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Hot asphalt batching plant – components and features.

All Tech Group is a manufacturer ofhot asphalt batching plants. We have successfully exported many machines of different capacities. This blog is about our recent installation of a 260 tph asphalt mixer and about its components and features. All Tech Group manufactures top quality asphalt batch plants with focus on quality and service. The equipment is designed to be working for long time without breakdown. The use of quality brought out items in the manufacturing enables us to offer the best quality.

Stringent quality norms are followed at each manufacturing stage. In the end, the equipment is sand blasted prior to application of paint. This process allows us to get a plant that is more finished and better looking. When higher quality components are used, the machine tends to perform better. Each component is designed with care, and it works in tandem with other units for a trouble free performance. Better- and high-quality raw materials = better quality and performance.

Components of hot asphalt batching plant 260 tph

All the components of the hot asphalt batching plant are important and crafted with precision. Since this is a tower type batch asphalt plant of 260 tph the components are bigger compared to the other smaller plants of 60 tph, 100 tph, 120 tph or even the 160 tph plants. The components are modular means the plant is easily broken down into different small components for easy installation. This also facilitates easy transportation of the full plant. The key components of this machine are listed as below:

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All tech group

5 bin cold aggregate feeder.

Primary vibrating screen and slinger conveyor.

Drying drum

Fuel efficient air atomization burner.

Bag filter with pre-separator

Filler silo with elevator

Hot aggregate elevator

5 deck vibrating screen

5 deck hot bins

Mixing unit

Weighing scales for filler, aggregates and bitumen on tower of hot asphalt plant.

Bitumen storage tanks with thermic heating unit.

Fuel tank for drum burner.

Control panel system

Features of hot asphalt batching plant (asphalt mixer) of 260 tph capacity

There are many strong advantages of All Tech Group hot asphalt batching plant. The asphalt mixer of 260 tph is designed to perform with precision. It is manufactured to produce quality hot mix asphalt as per the desired mix recipe. Some of them are under:

The 5-bin feeding unit is with adjustable push up roller for easy alignment.

The corrugated auxiliary belt avoids material wastage at the site.

Drum unit is supported by EN 350 forged rings.

Bigger trunnion rollers for better drum support.

Low noise air atomization burner

Proven and fuel efficient burner compliments the drum

Hot elevator with dual chain design for prolonged life.

5 or 6 screening decks – upon request of customer

Larger screening area for uninterrupted production.

Bigger hot bins for storing sufficient quantity of aggregates into separate compartments.

Hot bins are thermally insulated for heat retention.

Mixer is supplied by BHS. It is of 3500 kgs. Capacity.

Stringent and proven design of mixer that works smooth.

Aggregate scale size is 4500 kgs.

Filler scale size is 450 kgs.

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All Tech Group

Bitumen scale size is 300 kgs.

Bag filter with larger filtration area.

Bag filter has high cleaning efficiency.

Bag house is thermally insulated to keep the bags away from moisture.

Exhauster is heavy and bigger.

It is equipped with a variable frequency drive for efficient operation.

Foreign filler silo provided is of 60 m3 capacity.

Four bitumen tanks of 50 tons each provided with the plant.

Bitumen tanks are heated by a 700,000 thermic heater.

Control cabin is double storey with 2 PC’s on the top floor and all the control boards on the bottom floor.

Both the floors are air conditioned.

High technology cabin with user friendly software.

PLC with SCADA and with Siemens HMI.

Fuel tanks provided are 2 in number for using 2 different fuels. Each tank is of 24,000 liters.

Platform railings and ladders are of high quality with diamond shaped grating and anti-slip design.

Duct line comes with an improved design which is now maintenance free. It also allows free flow of gases.

Some advantages of All Tech Group hot asphalt batching plant, 260 tph

All Tech Group asphalt mixing plantshave proven their advantages and worth with more than 140 installations in 5 years. Below are some of the advantages of the All Tech Grouphot asphalt batching plant of 260 tph. The higher level of acceptance with customers is a proof of our quality product. The higher number of units is also a testimony of low maintenance, better after sales support, low fuel consumption, more savings and superior overall performance.

Few of the core benefits of asphalt mixers by All Tech Groupare as below:

● Structure: Overall structure is heavy with the plant tower unit girders being wider compared to the competition.

It’s advantage: It aids in getting more stability to the machine. The equipment can withstand harsh weather. The machine life will not be affected even after several re-installations.

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How Does a Bitumen Drum Decanter Work ?

Bitumen drum decanter is a machine for safe and reliable melting of bitumen. The process of working of bitumen drum decanter is safe because it uses heat generated by the hot oil for the melting process. The applications and value that a drum decanter gives is immense. Added to that, our design of it being reliable, safe and economic operation makes it ideal and very easy choice for those sites where bitumen is available only in the form of barrels. Bitumen Decanter Working (process):.

The process of melting of bitumen is simple. Bitumen drum decanter working can be categorized into a total of three steps, which includes:. - Feeding of the barrels. - Heating process. - Pumping out of bitumen. In the first step, the barrels have to be fed into the machine by use of the hydraulically operated arms. The second process which is heating process consists of the heating of bitumen in the barrels by continuous flow of heat transfer oil in the pipelines. This heat transfer oil continuously flows from the pipelines surrounding the barrels to ensure fast heating of the bitumen. As the bitumen is heated, it will start melting and start falling in the chamber below due to gravity. From here it will be transferred to the storage tank by use of bitumen transfer pump. Key Components of Bitumen Drum Decanter,. All Tech manufacturer and Exporters of asphalt batch mix plant.

Key components of bitumen decanter include a heating/ melting chamber, barrel feeding hydraulic arms, hydraulic power pack, thermic oil heater, pipelines for thermic oil transfer and bitumen pumping system. All these components can be easily connected to each other easily at the site. Some of the main components are highlighted as below:. - Melting chamber: It consists of a thermally insulated room with a network of pipelines designed to transfer the thermic oil for heating process. The melting chamber is divided into two parts.

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All Tech Group

The upper part will hold the barrels for heating, and the lower part will temporarily store bitumen till the time it is pumped out. - Hydraulics: The role of all the hydraulically operated arms in this machine is very important. They have to be of adequate capacity to push the bitumen barrels with good pressure. A hydraulic power pack has the hydraulic levers for individual hydraulic feeding gate control. - Thermic oil heater: This is the key component of the bitumen drum decanter. Atlas provides a three pass system for maximum fuel efficiency. It consists of a burner which will heat the oil flowing from the coils. - Pipelines for heat transfer: In the bitumen drum decanter, there is a series of pipelines that run from near each of the barrel feeding system.

These pipelines are very close to where the barrels stand during the melting process. Pipelines start from the thermic heating system where the burner is located and runs through the melting chamber back into the thermic heating system to complete the flow of thermic oil. - Bitumen pumping system: Bitumen pumping system is very important. It consists of a bitumen gear drive pump and a motor attached to it. Once bitumen is melt it will be transferred through this pumping system into another tank.

Installation Process For Bitumen Decanter. Proper installation of the bitumen decanter is key to long life of the equipment. There are many points that have to be taken care when installation of the machine is due. - For installation, we need to select the best available location which is slightly elevated. This is to avoid water seepage. - It is advisable to prepare a closed shade with some ventilation and place this machine inside a shade. - If construction of a shade is not possible, some barriers can be placed opposite to the entry and exit points of the barrels so that it blocks the free flow of the wind. This will help in minimizing heat loss. - Foundation drawing supplied should be strictly followed. - Before the trial run make sure all the components like cylinders, valves, burner, etc are working properly.

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All Tech Group

All the pipelines can also be checked and any extra materials, insects, etc can be removed prior to operation. - We want to ensure that no foreign particle enters the bitumen pump and damages the same, so having clean pipelines and storage chamber is a must. - Proper hygiene and safety standards have to be followed at the site at all times. Bitumen drumdecanter is a machine for safe and reliable melting of bitumen. It can safely extract bitumen from the barrels or bags by a melting method.

The process of working of bitumen drum decanter is safe because it uses heat generated by the hot oil for the melting process. - Pipelines for heat transfer: In the bitumen drum decanter, there is a series of pipelines that run from near each of the barrel feeding system. - Bitumen pumping system: Bitumen pumping system is very important.

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How To Get Quality Output from your Asphalt Batch Mix Plant

ALL TECH GROUP brings this blog series with the purpose of sharing its long-standing expertise by providing guidance for its readers on the salient objectives that should be kept in mind while operating a typical Asphalt Batch Mix plant. In this two-part series we will be discussing eight major objectives that should be kept in mind while operating a typical Asphalt Batch Mix Plant. Quality-- one goal accomplishing multiple objectives ALL TECH GROUP stresses on relying on quality machinery for quality outcomes; however, with our extensive experience in this sector, we can not stress enough on the need for following certain standard operating procedures while operating any plant machinery. One may have the best plant machinery at his disposal, but if one does not operate it properly, either it the machinery will malfunction or it will not produce the output of a standard and desirable quality.

Ensuring Quality with your Asphalt Batch Mix Plant Dear readers, this is a blog series where we discuss eight major objectives that should be kept in mind while operating a typical Asphalt Batch Mix Plant. Here in Part 1 of the blog series, we share with you four of them. Watch out for Part 2, to read the remaining. i. Physical Space for plant installation It is really worthwhile to have a clear idea of the physical layout where your batch mix plant will be erected with the view on whether you will be able to ensure appropriate and sufficient space for stockpiling the raw materials and their smooth delivery into the plant at its various entry points or not. We would advise you to avoid the erection and arrangement of your batch mix plant in congested locations where quick and smooth handling of the material might be restricted.

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Asphalt Batch mix plant Manufacture

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When the batch mix plant manufacture is facilitated by adequate space for the maintenance of large stock-piles of the raw-materials, experiences tell us that a uniform mix is produced. ii. Feeding of the cold aggregates The aggregates of different sizes are entered into your Asphalt Batch Mix plant through their own separate feeder bins. The aggregates are also referred to as cold aggregates in the process and this stage is also known as 'cold feeding'. It is very important that the plant functioning in this section ensures uniform input of each aggregate size and at the pre-determined speeds.

For a uniform output, one has to give a uniform input. Some points to keep in mind to ensure this are: Ensure there is no mixing or segregation of the aggregates in their respective stockpiles. Feeder gates should be properly calibrated so that they remain free flowing. Due to their size, the fines have the propensity to coalesce into larger sizes. To avoid this, the fines' feeder bin is attached to a vibrator that runs as long as the fines are entering the plant. It is important to note that vibration of the bin beyond its running time will lead to excessive packing of the fines in the bin. To ensure the above, the batch mix plants are furnished with calibrators at the feeder gates.

Your plant operator or the engineer should calibrate the batch mix plant before operating it on the site for work using real aggregates. The calibration process will involve setting the plant to produce the output at the desired rate, of desired consistency, and for pre-determined volume. Asphalt Batch Mix Plant Models iii. Appropriate aggregate moisture content Gradation of the aggregates and their moisture content are regarded by the industry-experts as one of the three most critical aspects to keep in mind when one desires a workable and perfect asphalt mix at the construction site. In fact, moisture content of the aggregates lying in the stock-pile and the feeder bins can vary with the surrounding environment including temperature.

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All Tech Group

Moisture content variation in aggregates affects the working in the Drying Drum in the following manner: Energy consumption incurred in the Drying drums will also increase with the increase in moisture content of the aggregates. It may also work inefficiently - sometimes over-drying an already dry aggregate or giving out an insufficiently dry aggregate. Aggregates leaving the drying drum will have varying temperatures due to which the temperature recorded at the Pug-Mill section will be incorrect. iv. Drying drums For efficient operation in the drying drum section of your batch mix plant, it is important that the air that is combined with the fuel for combustion is provided in appropriate amount.

Lack of insufficient air will cause incomplete combustion, leaving an oily coating on the aggregates which will in turn affect the quality of the finished mixture. The flow of air in a drying drum is provided by a blower and maintained by also having an exhaust fan on the other end. To check for oil coating on the aggregates, operators of the batch mix plant often take some of the aggregates coming out of the drying drums by a shovel and put them into a bucket of water. This imbalance of air draft causes 'hack pressure' in the drying drum and puffing back at the burner end.

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Things You should keep in Mind While Buying Asphalt batch mix plant.

If you've chosen to purchase an asphalt plant, it's going be a hard decision. The motives and the parameters needed to design the ideal machine could be difficult. It is often a difficult task choosing what storage containers, feeder bins and the type of controls needed. There are times when the distinction between the portable and stationary asphalt mixing plant could be complicated. On this page, we'll guide you through the purchase of asphalt plants.

When you've made the decision to build an asphalt plant of your own,, you must now take important choices. The choices will be related to the dimensions of the plant as well as the kind of asphalt plant, and the cost as well as the brand to choose. After these decisions are made, then we will decide on the design of the plant like bin size, tank size, kind of pollution control system storage silo.

There are two main kinds that asphalt plants can be found:

·         Drum mix plant (continuous plant)

·         Mix plant for batch mix (tower plant)

Batch Mix Plant

Batch mix plant creates hot mix asphalt large batches. Aggregates are fed into cold feed bins where they are transferred to the drum to be dried and heated. Following this, they are transferred to the tower unit by the bucket elevator. Then, on the tower unit, they will be divided and placed in several hot bins. In the meantime, bitumen and filler materials is transferred to separate weighing units that are on the top that of the tower.

Then, based on the needed percentage, the aggregates will be incorporated into a unit of pug milling. The process is followed by the addition of filler and bitumen to the mixer unit. After the mixing process, the material will be discharged to the trucks that are waiting or the storage silo.

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Advantages of batch mix plants

The main advantage of a batch mix plant is that it is able to produce high-quality hot mix asphalt of any mix type. The final product is of high quality hot mix asphalt, with the highest level of precision. Additionally, it is possible to incorporate various mix designs and run the plant with various mix designs. Because the components are modular, it is possible to upgrade or retrofit parts as and as needed. This enhances the functionality that the mixer can offer.

The weaknesses from the batch mixer plant

A batch plant is required to spend much of its time moving and weighing the materials. A significant amount of energy is used during this process which makes the batch plant use more energy in order to produce hot mix asphalt. Because the number of steps used are higher and the amount of energy required is also higher. Additionally, the batch plant will require more space, and a high initial cost to set up.

Drum mix plant

The drum mix plant a basic form of asphalt plant. It employs a straightforward method to produce the hot mix asphalt. It is a straightforward and continuous method to produce HMA continually. The process begins with the material being fed into the Cold feed bins. The aggregates are progressively taken to the drum to be heated as well as for mixing. Within the drum, mixing and heating are done in one unit. When the aggregates are introduced into the drum, they weigh them together and this weight is transmitted through the panel in order to ensure that how much bitumen as well as filler material.

In the beginning, the drum heating process, the drum is heated and mixing takes place in the latter part of the drum. After mixing thoroughly with bitumen and filler material the filler material is taken out of the storage silos or waiting trucks.

Continuous drum mix plants may be a parallelflow as well as counterflow types. Parallelflow means that the material flow and the burner flame are both in the exact same direction. Counterflow is when both the material flow and burner flame are in opposite directions.

The main advantages of mixing drums

The primary benefit of a drum mix plants is that it employs the most basic procedure to make hot mix asphalt. In removing many processes drum mix plants use less energy to create hot mix asphalt. The initial investment cost is less, as well as the power required for operation is also reduced. Maintenance costs are lower when compared to batch. The overall cost for running and maintaining is significantly lower than an asphalt batch plant.

If it is necessary to have a portable unit for your needs, a drum plant would be superior because it uses a lesser quantity of components. A drum plant will make use of fewer components, which means the expense of transport will be lower.

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The weaknesses of the batch mixing plant for drums

A lower degree of accuracy in the end product is the primary problem with Drum mix plants. Bag filters are a type of pollution control device can't be utilized with drum mixers. The numerous customization options offered on a batch facility might not be available in the mixing plant for drums.

The style of asphalt plant

There are two main types of asphalt plants: stationary and portable. The choice between the two is easy. If the plant has to move frequently, an asphalt plant that is portable is the an ideal choice, whereas stationary plants are preferred.

If we evaluate specifications against the specifications of various manufacturers, then a mobile asphalt plant is more expensive when compared to stationary asphalt plants. If the plant is required to be moved only a couple of times throughout the year or more frequently, then a mobile form of asphalt plant can be beneficial. If the movement of the plant needs to be performed once in the next few years, the portable or mobile plant is not the best choice because the price for portability is higher.

In these cases plants with a skid-mounted design is far superior. Atlas also produces and sells skid-mounted plants that are wired components that are ready for installation.

Dimensions and components of the asphalt plant

It is essential to study the requirements of the plant, and determine the capacity. It is important to keep in mind that a high capacity plant is not going to be favored. The plant must be moderate and medium-sized, with a focus on the inclusion of crucial elements.

The plant shouldn't be tiny with small components that are too small. This will make it difficult to upgrade later on. When the plant's size is of a medium size, consider whether it is feasible to increase the capacity of the plant by replacing a few parts.

The ideal plant is one that it's operating at around 80percent capacity. This makes certain that the components perform better and last longer. But, you could also select a moderate-sized plant that has an storage silo in order to boost production prior to.

Important to have the correct configuration of components of the asphalt plant

·         Correct and proper configuration of components is essential for the selecting the asphalt plants. A proper selection of configuration and the set of components is crucial to the overall success of the project. The main components that are crucial include:

·         Cold aggregate bins for feeders. The design of the feeder bins is crucial. It is all dependent on the amount of aggregates required to be used and this can influence the layout that the bins are placed in.

·         The size that the tanks for bitumen must to be of a sufficient size. It is not advisable to make larger amounts of asphalt without an adequate supply of bitumen. It is essential to have enough of the storage tank for bitumen in order to allow production to be carried out without issue.

·         The burner's configuration is crucial because in some areas, various fuel choices like coal, natural gas, etc . are readily available. If the consumer is informed and chooses the right burner it will save a significant amount of dollars in the long term.

·         Storage of hot mix asphalt Storage of hot mix asphalt must have enough capacity. When the number of trucks is smaller in number , the plant must not be waiting for to get the following truck. This ensures uninterrupted output for the factory. The silo is an extremely useful device when continuous production is required to be maintained.

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Which is better ? Paver Blocks vs Concrete Slabs

If you are thinking of paving your walkway or driveway there are a variety of options but making the right choice is crucial as it could alter the appearance of your drive or walkway way and could even impact the lifespan of the pavement based on the use.

Pavers vs concrete slabs

Poured concrete is set in huge blocks. It is robust. It can withstand patterns and acid stains, as well as rough. However pavers are also known as bricks or paving stones pavers are interlocked tile made of concrete. Many people appreciate the flexibility, the color, and look of bricks that are paved and prefer them to concrete poured. Both choices come with their own advantages and drawbacks.

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All tech Group

Aesthetics

Paved concrete blocks offer advantages in terms of aesthetics. With a variety of patterns to choose from you can pick what your walkway appears and then customize the look. Different colored paver blocks can be combined to make the appearance more unique.

Concrete can be stretched or placed in a stone to make it look attractive and appealing. Concrete that is stamped closely resembles pavers stones.

Cost

Poured concrete is less expensive initially than block paved with asphalt, however the long duration of repairs or maintenance costs of concrete may be far more than the price of bricks and exceed the initial savings that can be made with concrete slabs.

Poured concrete is less expensive initially than bricks that are paved, but the lengthy repair or maintenance cost of concrete may be far more than the price of bricks and overshadow the savings initially made by concrete slabs.

Installation

Concrete can be poured , and is simple to set up. The process of drying concrete will require time, and the process of installation could comprise excavation, foundation preparation and the setting of concrete pouring. The ground needs to be stabilized otherwise concrete will break over time. We've seen poorly graded concrete that has resulted in low spots, which can hold water and cause stains to the concrete. Therefore, we are aware of how important concrete grade.

The installation of paving stones involves greater labor costs in comparison. In this case, there is no curing process and the surface is ready for use immediately after the installation. Grading, excavation, and laying an appropriate sub base layer and compaction in the bottom layer is extremely crucial. Even after the pavers are laid, the compaction of the paver blocks in the beams of bonding and sealing the blocks in a complete manner is vital for the best results using paver blocks. The issue of grading could be addressed later through readjusting or changing the paver blocks.

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Durability

Concrete slabs may crack in the event that the ground beneath them changes. Its strength is largely dependent on the shifting of the ground below. If the grade is not correct it is likely to result in the possibility of water accumulation across the concrete slab. However the water will not sit on paver blocks because of the many joints within the paver blocks. When the grade is done correctly it will not remain on the top of the paver blocks and not cause drainage problems. Paving blocks are beneficial because they permit water to soak into the soil, which will also help to improve the level of ground water. If done correctly they can last for years and also withstand greater load than concrete slabs. The distribution of load is more efficient when paving blocks are used since they can distribute the pressure or weight equally.

Maintenance

If the concrete cracks, it must be sealed, which can degrade the durability of the concrete and also the appearance of the driveway or the pavement due to the mismatch in coloration. In the end, this is a very expensive process. Pits and stains can form on concrete slabs due to the atmospheric pressure.

Since pavestones are made up of blocks that are paved and interconnected, it is simple to replace just one piece at a time. The smaller parts of the concrete blocks could be removed and problems with underground could be addressed which would be a challenge when concrete is laid. This is less costly when compared to maintaining concrete slabs.

Value addition

Concrete is slippery when wet, but only if the surface is ground in wet. Anti skid agents can be applied to avoid slippage.

Paving blocks are not skid-resistant and provide good traction. They also give immediate aesthetic value after installation.

Article Credit:- All Tech Group Pvt. Ltd. All Tech is among the best exporters and manufacture of Asphalt plant, counter flow drum mix plant, Batch mix plant.

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What Batch Type Asphalt Plant Suits Your Cement

The days when Batch Type Asphalt Plant added to the planet's contamination as well as pollution are currently now gone. Today, you can discover Batch Type Asphalt Plant (otherwise called concrete plant) with a manageable configuration, decreasing dust and molecule outflow and reusing waste water. In the meantime, Mobile Asphalt Plant is ideal for undertakings that move from spot to another, for example, street works and pipelining activities. When searching for a Batch Type Asphalt Plant, there are a couple of things you have to consider. When looking for one, remember these.

Focus your financial plan Do you have to purchase your own particular or simply rent a couple? Obtaining your own particular is an enormous business speculation. Those in the development business will discover this instrument important. In the meantime, those taking a shot at a real one-time undertaking, for example, pipelining and burrowing, may want to rent units. Work with the financial backing that you have and search at a unit inside your cost range. Consider what Type Asphalt batch mix plant suits your cement Observe the concrete sort you are utilizing for your development venture. Diverse hardware handles distinctive bond blend and total (stones, sand, rock, and rocks) blends. See which machines can prepare the sort of cements you will utilize.

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All Tech Group

The essential highlights you have to search for in every kind of clumping plant are the blending gear and capacity compartments for every fixing. Your blending chamber ought to be sufficiently huge to oblige your evaluated measure of concrete yield every clump. Select the technology you require There are three sorts of solid blending plant units: programmed, self-loader and manual. Sustain the machine your concrete formula and it will sort totals, measure every fixing precisely, and burden them into the blender for transforming. Your concrete needs to be decent with nearby construction standards. Blenders arrive in an extensive variety of sizes, from convenient small scale blenders to sizeable business blending trucks.

Check the highlights of every clumping plant and verify every one capacity well. Most development destinations have their own concrete blending master on the group. For those that don't, or for the individuals, who are not acquainted with the Batch Type Asphalt Plant interface, verify you get some information about the things included in your rental package. Keep in mind these tips and you will find the most ideal Plant for Cement Mixing. The days when Batch Type Asphalt Plant or counter flow drum mix plant added to the planet's contamination as well as pollution are currently now gone.

Today, you can discover Batch Type Asphalt Plant (otherwise called concrete plant) with a manageable configuration, decreasing dust and molecule outflow and reusing waste water. Pick a stationary solid blending plant for consistent cement needs. In the meantime, Mobile Asphalt Plant is ideal for undertakings that move from spot to another, for example, street works and pipelining activities. For those that don't, or for the individuals, who are not acquainted with the Batch Type Asphalt Plant interface, verify you get some information about the things included in your rental package.

Article Credit:- All Tech Group. ALL Tech Group is a well know asphalt batch mix plant manufacturer and Exporters in India.

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What Batch Type Asphalt Plant Suits Your Cement

The days when Batch Type Asphalt Plant added to the planet's contamination as well as pollution are currently now gone. Today, you can disco...

The days when Batch Type Asphalt Plant added to the planet's contamination as well as pollution are currently now gone. Today, you can disco...

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Some of Useful Tips For Asphalt Paving Driveway Maintenance

When presenting carports of new homes, black top clearing or Hot Mix Asphalt is usually what one considers. It is by a wide margin one of the scarcest expensive procedures for clearing a surface in new home development goals. Suitably presented black-top cleared carports have a future of around no less than thirty years. These black-top cleared carports include shake particles, sand, and black-top bond, which make it solid and versatile.

The new asphalt is by far the most versatile in light of the fact that in spite of all that it holds an impressive part of the lighter hydrocarbon oils that make up its DNA structure. Pounded rock makes up the foundation on which the asphalt is laid, to propel soundness of the asphalt structure. By laying five to eight creeps of rock underneath the asphalt you are ensuring an essential future for your asphalt garage. Maintaining your asphalt batch mix plant is essential because that can expand lifespan.

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All Tech Group

Moreover, by having your black-top clearing organization present your black-top finish no short of what one foot before the asphalt covers the stone, you are allowing your black-top garage to not break when visitors drive to the edge of the finished surface. This will give more conspicuous flexibility and allow your black-top garage to look as not too bad as it can for whatever time allotment that possible. The accompanying step is to seal your black-top garage after around six to nine months Baltimore Paving. The new black-top garage must cure out over that time span. On the off chance that fixed to rapidly, the hydrocarbon oils that give the asphalt clearing its adaptability will make it be excessively adaptable, along these lines, permitting more prominent imprints to exist after some time.

When the time has come to seal your black-top cleared garage, recollect putting no less than two layers of excellent seal coat over the whole carport. This is to be rehashed each three to five years for the most extreme future of your black-top cleared carport. By being patient and taking after this exhortation, your black-top cleared carport will be around for a long time to come. The new dark top carport must cure out over that time traverse. In the case settled too quickly, the hydrocarbon oils that give the asphalt clearing its flexibility will make it be too much versatile, thusly, allowing more noticeable engravings to exist after some time. At the point when the time has come to seal your dark top cleared garage, remember to put no under two layers of brilliant seal coat over the entire garage.

This is to be reiterated every three to five years for the most outrageous future of your asphalt cleared carport. By being patient and taking after this admonishment, your dark top cleared garage will be around for quite a while to come. Suitably presented black-top cleared carports have a future of around no less than thirty years. These black-top cleared carports include shake particles, sand, and black-top bond, which make it versatile and solid. When the time has come to seal your black-top cleared garage, recollect putting no less than two layers of excellent seal coat over the whole carport.

Article Credit:- ALL Tech Group. ALL Tech Group is manufacture and exporters of asphalt batch mix plant manufacturer and exporters of India.

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Some of Useful Tips For Asphalt Paving Driveway Maintenance

When presenting carports of new homes, black top clearing or Hot Mix Asphalt is usually what one considers. It is by a wide margin one of the scarcest expensive procedures for clearing a surface in new home development goals. Suitably presented black-top cleared carports have a future of around no less than thirty years. These black-top cleared carports include shake particles, sand, and black-top bond, which make it solid and versatile.

The new asphalt is by far the most versatile in light of the fact that in spite of all that it holds an impressive part of the lighter hydrocarbon oils that make up its DNA structure. Pounded rock makes up the foundation on which the asphalt is laid, to propel soundness of the asphalt structure. By laying five to eight creeps of rock underneath the asphalt you are ensuring an essential future for your asphalt garage. Maintaining your asphalt batch mix plant is essential because that can expand lifespan.

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Asphalt batch mix plant Manufacturer

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All Tech Group

Moreover, by having your black-top clearing organization present your black-top finish no short of what one foot before the asphalt covers the stone, you are allowing your black-top garage to not break when visitors drive to the edge of the finished surface. This will give more conspicuous flexibility and allow your black-top garage to look as not too bad as it can for whatever time allotment that possible. The accompanying step is to seal your black-top garage after around six to nine months Baltimore Paving. The new black-top garage must cure out over that time span. On the off chance that fixed to rapidly, the hydrocarbon oils that give the asphalt clearing its adaptability will make it be excessively adaptable, along these lines, permitting more prominent imprints to exist after some time.

When the time has come to seal your black-top cleared garage, recollect putting no less than two layers of excellent seal coat over the whole carport. This is to be rehashed each three to five years for the most extreme future of your black-top cleared carport. By being patient and taking after this exhortation, your black-top cleared carport will be around for a long time to come. The new dark top carport must cure out over that time traverse. In the case settled too quickly, the hydrocarbon oils that give the asphalt clearing its flexibility will make it be too much versatile, thusly, allowing more noticeable engravings to exist after some time. At the point when the time has come to seal your dark top cleared garage, remember to put no under two layers of brilliant seal coat over the entire garage.

This is to be reiterated every three to five years for the most outrageous future of your asphalt cleared carport. By being patient and taking after this admonishment, your dark top cleared garage will be around for quite a while to come. Suitably presented black-top cleared carports have a future of around no less than thirty years. These black-top cleared carports include shake particles, sand, and black-top bond, which make it versatile and solid. When the time has come to seal your black-top cleared garage, recollect putting no less than two layers of excellent seal coat over the whole carport.

Article Credit:- ALL Tech Group. ALL Tech Group is manufacture and exporters of asphalt batch mix plant manufacturer and exporters of India.

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Some of Useful Tips For Asphalt Paving Driveway Maintenance

When presenting carports of new homes, black top clearing or Hot Mix Asphalt is usually what one considers. It is by a wide margin one of ...

When presenting carports of new homes, black top clearing or Hot Mix Asphalt is usually what one considers. It is by a wide margin one of ...

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Construction - Supreme Equipment, Top in Class Manufacturers, And Worldwide Exporters

Asphalt batch mix plants manufacturers

furnish good quality mini asphalt drum mix plant that is manufactured from excellent quality raw materials that mark them highly reliable and dependable. Theses drum mix plant is known for effectual performance and easy operation. These drum plants are available in varied production capacities and can even be customized as per requirements of honored customers.

Asphalt batch mix plants manufacturers ensure easy accessibility. Modern Drum Mix technology is used to produce the highest quality hot Asphalt mixture. Coating action in the drum mix produces uniform high quality hot mix with equipment that has few wearing parts and requires less maintenance.Asphalt drum mix plants exporters too exports high quality, matching up to their customer's requirement.

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Vacuum Excavators - vacuum excavators are prepared when vacuum excavation occurs when high-pressure water or pressurized air breaks up and cuts the soil, while a high-flow vacuum system lifts the soil up and out of the excavation area.

Buried natural gas, petroleum pipelines, and water mains can be quickly and efficiently uncovered with greatly reduced risk of strike. Fiber optic lines, cables, and other utilities can be efficiently located without the damage that can happen with the help of vacuum excavators.

The most critical portions of this design involves the lower portion for silo construction, where the large loads from the material being stored are channelled, and an efficient flow pattern that allows for efficient unloading of the silo.

Asphalt Pavers - The multi-function paver is applicable to the paving operation of various kinds of road basic stabilizing material and surface material. The travel of the asphalt pavers are driven independently by right and left sides, and controlled by microcomputer

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asphalt plant manufacturer

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All Tech Group

The interface also facilitates the transfer of all data from the control system to a computer where the data can be processed as per the customer's requirements.

Road Construction Equipment such as hot mix plant, dryer drum, wet dust collector, bitumen storage tank, bag house, vibratory tandem roller etc are used for many kind of construction. And to manufacture and exports them there are road construction equipment exporters,and road construction equipment manufacturers.

Road Construction Equipment manufacturers continuously endeavor to bring forth the technology, the world looks forward to, the manufacturers have always responded to every need and application with perfect solution.The entire range of road construction equipment and road construction machinery is a masterful creation that construct roads though masterful strokes provided by these road construction equipment manufacturers.

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The Way An Asphalt Batch Mix Plant Functions

Mixing different sizes and grades of aggregates in asphalt mix plants produces asphalt material. These aggregates are mixed with the appropriate amount of liquid bitumen, and heated together to create hot asphalt mixture. Asphalt is a mix of bitumen and pulverized stones that is used for making pavements.

There are a few factors that determine the characteristics and quality of an asphalt mix. These factors include the amount of aggregate used and the type or recycled pavement.

How does hot mix asphalt get made? Once the aggregates have dried, they are heated to coat them with bitumen. You can dry the aggregate by rolling it in a dryer drum. To evaporate dampness and generate heat, the dryer drum is heated to below. The aggregate remains in the top half of drum. The interior contains several types of flight that heat the drum. The mixing chamber is where the aggregates are covered with bitumen.

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Asphalt Batch Mix Plant Manufacturer

All Tech Group

There are two main types of asphalt plants.

Asphalt is produced in small batches by the batch plant, also known to be called the discontinuous tower plant.

Drum plant also known as continuous plant. This plant is capable of producing asphalt continuously, without any stopping. These plants can work in parallel or against flow

How an Asphalt Batch Plant works

Mixing begins when aggregates are removed from feeders. The aggregates are then moved by a conveyor to a drying drum. This drum has an internal flight that quickly dries the contents. The aggregates are then transported outside to the drying drum, where they are separated through sedimentation. The aggregates are then sorted according to their size and placed in the hot bins.

Once the aggregate sizes are sorted and controlled they can be allowed to enter the mixing chamber. The aggregate sizes are then combined with bitumen in a controlled quantity. The bitumen is taken directly from the container. It is then stored at high temperatures. The product is delivered in the right proportions by the mixing unit. The mixture is ready to be discharged. It is then unloaded from the hot storage silo. It can be loaded on a truck if it is ready to transport.

Parallel Flow Drum Plants – Functioning

Parallel flow drum asphalt plants produce asphalt continuously unlike batch-producing plants. Parallel flow drum asphalt plants only require one dryer to dry and mix. The dryer is used for drying the mixture and mixing it with bitumen. The mixture is weighed as it moves from the cold feed bins to the mixing drum via the charging conveyor belt. After the mixture has been weighed it is placed in the drum's lower section to be stored in one the silos. You can also load the mix directly into a truck to transfer it immediately. Asphalt mixers that utilize parallel flow can be used with both dry and wet types of pollution control systems. There are a variety of capacities available, ranging from 40 tph to 200 tph.

Article Credit:- All Tech Group. All Tech Group is

manufacturer and supplier of asphalt batch mix plant, asphalt plant,

counter flow drum mix  plant,

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The Wet Mix Macadam

Wet Mix Macadam (WMM)  or the wet drum mix plant is a reasonably newer principle used for laying the base program, which is positioned right before the hot mix asphalt during road construction. The binding products utilized for a base in the case of WMM are prepared in the plant and then offered to website for rolling and overlaying. An essential WMM plant features the following parts:

Cold Accumulation Feeders

Vibrating screen

Conveyor with tons cell

Pugmill mixer

Lots out conveyor

Silo or Hopper

Water storage tank

Control board inside the cabin

The WMM plant provides the versatility to provide it with additional concrete. The plant is offered with a cement hopper and also a cement silo for pumping the extra cement directly right into the pug mill. The electric motor that comes geared up with the screw conveyor of the concrete hopper/silo is synchronized with the tons cell, and the needed amount of concrete can be included in the pug mill.

Accumulated feeders: The four-bin aggregate feeder of the WMM plant is constructed to keep four sorts of accumulations. Each of the bins is supplied with a gate for hand-operated change. In addition, each container is offered with belts driven by variable-speed electric motors to discharge the products to the gathering conveyor.

Solitary Deck Vibrating Display: The celebration conveyor belt passes through the shaking display before supplying the accumulations to the charging conveyor belt. The shaking screen filters the significant collections.

Charging Conveyor: Once the aggregates are filtered with the help of the shaking displays, the billing conveyor supplies the totals to the pug mill mixer after the load cell attached to the conveyor evaluates the accumulations. Finally, it sends out the material to the panel so that the cement and the water flow can be integrated.

The rugged structure of the pug mill consists of lining plates, arms, and also tips. These are replaceable elements of the WMM plant, which are expected to be changed for better performance. The mixing system contains two arms that are parallel to each other and are geared up with pointers. When it comes in contact with water from the pipelines over, the material inside the pug mill is combined well with these arms' aid and suggestions as it obtains splashed.

The concrete silo that is available in various capabilities adds the cement directly into the pug mill mixer. Cement is the material used as a binding representative, is generally added in restricted quantities with the help of the screw conveyor with a variable rate electric motor.

Control panel: The control board placed inside the cabin, which is generally situated to have full sight of the plant, provides complete control of the equipment with the help of a straightforward software program.

The load-out conveyor is the one that transfers the mixture to the storage space silo, which consequently pumps the material into the trucks.

Lively design's Wet Mix Macadam Plants are challenging, straightforward to run, friendly job machines that provide premium WMM for our roadway building and construction.

All Tech Group is a swiftly expanding Asphalt batch Plant Suppliers based in Mahesana,India. We offer an extensive range of road-building equipment that assists in constructing secure, sturdy, and cost-effective roads. We give asphalt batch mix plant, asphalt drum mix plant, WMM plant, bitumen sprayer

Wet Mix Macadam (WMM)  or the wet drum mix plant is a reasonably newer principle used for laying the base program, which is positioned right before the hot mix asphalt during road construction. The binding products utilized for a base in the case of WMM are prepared in the plant and then offered to website for rolling and overlaying. An essential WMM plant features the following parts:

Cold Accumulation Feeders

Vibrating screen

Conveyor with tons cell

Pugmill mixer

Lots out conveyor

Silo or Hopper

Water storage tank

Control board inside the cabin

The WMM plant provides the versatility to provide it with additional concrete. The plant is offered with a cement hopper and also a cement silo for pumping the extra cement directly right into the pug mill. The electric motor that comes geared up with the screw conveyor of the concrete hopper/silo is synchronized with the tons cell, and the needed amount of concrete can be included in the pug mill.

Accumulated feeders: The four-bin aggregate feeder of the WMM plant is constructed to keep four sorts of accumulations. Each of the bins is supplied with a gate for hand-operated change. In addition, each container is offered with belts driven by variable-speed electric motors to discharge the products to the gathering conveyor.

Solitary Deck Vibrating Display: The celebration conveyor belt passes through the shaking display before supplying the accumulations to the charging conveyor belt. The shaking screen filters the significant collections.

Charging Conveyor: Once the aggregates are filtered with the help of the shaking displays, the billing conveyor supplies the totals to the pug mill mixer after the load cell attached to the conveyor evaluates the accumulations. Finally, it sends out the material to the panel so that the cement and the water flow can be integrated.

The rugged structure of the pug mill consists of lining plates, arms, and also tips. These are replaceable elements of the WMM plant, which are expected to be changed for better performance. The mixing system contains two arms that are parallel to each other and are geared up with pointers. When it comes in contact with water from the pipelines over, the material inside the pug mill is combined well with these arms' aid and suggestions as it obtains splashed.

The concrete silo that is available in various capabilities adds the cement directly into the pug mill mixer. Cement is the material used as a binding representative, is generally added in restricted quantities with the help of the screw conveyor with a variable rate electric motor.

Control panel: The control board placed inside the cabin, which is generally situated to have full sight of the plant, provides complete control of the equipment with the help of a straightforward software program.

The load-out conveyor is the one that transfers the mixture to the storage space silo, which consequently pumps the material into the trucks.

Lively design's Wet Mix Macadam Plants are challenging, straightforward to run, friendly job machines that provide premium WMM for our roadway building and construction.

All Tech Group is a swiftly expanding Asphalt batch Plant Suppliers based in Mahesana,India. We offer an extensive range of road-building equipment that assists in constructing secure, sturdy, and cost-effective roads. We give asphalt batch mix plant, asphalt drum mix plant, WMM plant, bitumen sprayer

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Why Counter Flow Asphalt Plant?

Since a lot of our clients, both existing and brand-new, enjoy the counter flow asphalt mix plant, it becomes part of our assembly line. The standard hot mix plant makes use of a counter circulation asphalt mixer. It is simpler to make excellent quality warm mix asphalt than the parallel flow drum mix plants Counter circulation asphalt blending plant with dual drums It is virtually similar except that the drying out of accumulations happens in a different way Mixing of accumulations remains in the very first drum, and also in the 2nd drum after that The drying out process is finished.

This is not the only specialty of the drum mixing plant; there are two other notable factors. When the aggregates get in the exhauster, the exhauster fools dirt from them Drum. The dust is dried and also wet gathered. The accumulations When moving in the direction of the heater fire, make sure to keep your hands tidy.

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Counter flow mix plant manufacture

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All Tech Group

This will aid you conserve fuel The clothes dryer drum heats up the accumulations and eats it. Waste is absolutely no When contrasted to parallel circulation asphalt drum plants. The setting The clothes dryer heater runs in the opposite direction to the flow of aggregates. This allows for optimum home heating of accumulations while they are being moved. Towards the heater flame throughout their entire trip in the very first drum.

Asphalt prepared for building and construction. Fulfills local environmental criteria for asphalt plants. We also supply mobile asphalt plants with counterflow design. Cold feed bins and also vibrating screen are the parts of an asphalt plant. Charge conveyor with load cell to evaluate aggregates These are moved to the following drying drum. The drying drum is geared up with a burner to warmth accumulations efficiently After the The drying drum is the mixing drum, which mixes warmed accumulations. lime and also bitumen The plant also includes gas and also lime. Tank for clothes dryer burner, asphalt tanks(s), mineral filler as well as completely dry and wet powder enthusiast type contamination control gadget. A control cabin furnished with PLC.. Control of asphalt is done by a microprocessor-based control board Concrete plant can be run in handbook or auto setting. Options for storage silo They are also readily available. The design difference contrasted to The solitary drum asphalt blending plant could seem tiny. You will pay even more for asphalt drum mix plant solitary drum than you would. You will certainly be able to understand this article by the end of the post The concept behind the plant.

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Why You Should Invest In Asphalt Batch Plant

An asphalt mixing plant is definitely one of the best ways to simplify your road construction process. There are five reasons why you should consider investing the cost of an asphalt mixing machine to ensure the best outcomes. There are a variety of kinds and types of mixing and batching plants. One of the benefits of owning an individual batching machine is the fact that it allows you the ability to control your the ability to control the supply. You also have the ability to control your quality HMA and have the assurance of. The advantages of this are immense.

The most basic kinds (category) for asphalt batch mix plants are:

Batch mix

Continuous type

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Asphalt batch mix plant

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All Tech Group

Like the name implies, batch mix refers to the final product is created in specific batches. Most of the time, they are more expensive to buy. Batch machines are also more precise. They are more flexible and is able to prepare various mixes according to the requirements. The machine has modular structure which can be retrofitted anytime.

Continuous plants produce HMA continuously. They typically take up smaller areas and can be more affordable to purchase. Asphalt plants that mix continuously are generally easy to construct and maintain. They are often simpler to set up and then reinstall. Modern models have also upgraded control panels , which include facilities to save mix recipe recipes.

The benefits of investing in an asphalt Batch Plant include the following:

There are many benefits of investing in an asphalt batch plant Five points are highlighted below:

Efficiency - The traditional technology for making hot mix asphalt has proven to be not efficient. Customers demand more advanced technology and a better operation. This will allow them to keep ahead of their competitors. If the process is automated there will be lesser human involvement. This can reduce the chance of errors and improve efficiency. If the process is automated, you can modify to meet our needs. The process can be modified and improved to make it more efficient. The process of hiring and managing high-quality and efficient labor is not easy. All this automation can reduce dependence on labour.

Environmental protection Batch mixing machines include bag filters to reduce pollution. This reduces the environmental impact. We can lower the burden on the environment while also conserving our precious resources.

Safety first - Safety is the first priority for those working on asphalt mixing plant. They are outfitted with all the safety equipment needed to safeguard oneself in the event incidental accidents. Lower emissions create more peace of mind and less accumulation of harmful elements. This is a long-term huge investment in security.

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Asphalt batch mix plant Exporters

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All Tech Group

Greater precision - When the precision is greater it can bring many direct and indirect benefits. One of these is less waste of material, higher quality, less use of fuel as well as a higher quality end product. This all will result in better control over quality , which in turn increases profits.

High-quality end product - The quality of the end product is the goal we aim for. This can result in less physical and mental stress as employees and customers will be satisfied. A higher level of revenue and customer satisfaction will be the norm because the business will grow with more revenue.

A batching plant for asphalt is an investment that will last for a long time. The plant requires planning as well as staff to run the plant. But the advantages are numerous in addition to the fact that the hot mix quality is high-end. If you purchase it from a reputable manufacturer that can provide your purchase with excellent service and spare parts support, you'll be halfway done.

Article Credit:- All Tech Group. All tech is one of the top tier manufacturer and exporters of Asphalt batch mix plant in India.

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Technologies that Top Asphalt Batch mix plant Factory Have.

If you are looking for high-quality hot mix asphalt, then an Asphalt batch mix plants are your solution. It is the best equipment to make top-quality hot mix asphalt batch sizes. It is highly regarded because it can make high quality final product. Each piece of material is measured and the final product is much superior to continuous mixing plants. The latest technology that an excellent asphalt batch mixing plant is able to utilize and will contribute to increasing production rate and decreasing the costs. This is all done without affecting the final product's quality.

All Tech Group is an Indian manufacturing and exporting hot mix asphalt plant, with distinct advantages, including:

·         Plates for skids on all models

·         Bag house that has the highest cleaning effectiveness

·         Modular structure

·         Containerized design

·         Multi fuel and efficient burner

The above factors are designed to improve its overall performance. This will also give customers certain benefits such as quality, reliability, efficiency savings, performance and so on.

What is the latest technology in the top asphalt batch plant?

A factory that manufactures asphalt batch plants that is to be of the highest quality requires to be better than flawless. The technology used to manufacture the equipment needs to be advanced. Atlas ensures that we are constantly improving our equipment in a manner that will benefit our customers greatly.

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Counterflow drum mix plant

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All Tech Group

A few of them are listed below:

Mixing unit of the Asphalt plant is among the most important elements. It's robust for optimal and continuous performance. Mixing unit has individual gear boxes for each shaft. Mixing unit provides enough space to perform routine maintenance. The tips, arms and the liner plates have been constructed of toughened materials for long-lasting use.

Drying drums of asphalt plants includes a multiple fuel burner. Burner is compatible using diesel LDO or FO. Gas, too. It's efficient and a modulating type. The burner complements the drying drum to perfection. It is able to heat aggregates evenly while using less fuel. The design of the flights, coupled with the burner's efficiency aids in to heat with less fuel. The aggregates will be released at the bottom of the drum before they reach the upper part of the drum to heat.

A baghouse unit can be a a crucial component. It was designed to maximize cleaning effectiveness. The oval bags provide a large cleaning space. There are rotors on top to allow for an effective clean-up of bags. Three or more rotors are separated for simple efficient and quick cleaning.

Control panel for the asphalt plant is simple and intuitive to use. It is equipped with a colour HMI display. It is simple to work with SCADA as a standard. The system is essential to monitor all variables for the plant to attain the best hot mix asphalt quality.

A well-designed asphalt batch plant can make high-quality hot mix asphalt, with significant benefits in terms of quality. As a reputable manufacturer, we insist on the quality of our product. Our aim is to deliver the highest quality product that will endure for a long time and work with precision.

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Crusher Machine Used For The Highly Energy - Intensive Mining And Crushing Industry

Stone Crushing Industry

Crushed stone and sand & gravel are the main types of natural aggregate used in the United States. Despite the low value of its basic products, the crushed rock industry is a major contributor to and an indicator of the economic well being of the nation. Industry consolidation is on the rise as large producers buyout the smaller producers. Individual crushed-stone quarries range in size from 50,000 to 10 million tons of product annually and the major assistance is given by asphalt batch plant manufacturer.

Asphalt Batch Plant Exporters

In 2011, 1,260 companies operating 3,300 active quarries and distribution yards produced 1.5 billion tons of crushed stone valued at $8.6 billion and employing more than 70,000 people. Of the total crushed stone produced in 2011, about 71% was limestone and dolomite; 15%, granite; 7%, trap rock; and the remaining 7% was shared, in descending order of quantity, by sandstone and quartzite, miscellaneous stone, marble, calcareous marl, slate, volcanic cinder and scoria, and shell. Leading states, in order of production, were Texas, Florida, Pennsylvania, Missouri, Illinois, Georgia, Ohio, North Carolina, Virginia, and California, together accounting for 51.8% of the total output (USGS, 2011).

During the past 25 years, production of crushed stone has increased at an average annual rate of about 3.3%. These projections suggest that vast quantities of crushed stone and sand and gravel will be needed in the future and that much of it will have to come from resources yet to be delineated or defined. Further growth will be fueled by new legislation that is allocating significant monetary resources into the construction and repair of highways and bridges in the United States.

Asphalt Batch Plant Exporter

Asphalt Industry

Asphalt creation starts with a mixture of sand and small and large rocks (called aggregate), which are combined with heated asphalt cement - thus the name hot mix asphalt (HMA). There are two basic types of plant designs used to manufacture HMA: batch plants and drum plants. There are approximately 3,600 HMA plants in the United States, accounting for a total annual production of 450 to 500 million tons of asphalt paving material. About 2,300 of the HMA plants are batch plants, with the remaining 1,300 are drum mix plants. The asphalt pavement industry employs approximately 330,000 people in the U.S. About 94% of the nation's roads and highways are surfaced with asphalt.

Stone Crushing Process

Stone crushing involves the following processes: mining, processing, crushing, screening and transportation. These processes are discussed in detail below.

Mining

The shot-rock is typically transported to the crushing plants using trucks. The large end users in the crushing plant consist of feeders, crushers, conveyors and screens.

Crushing

Crushers mechanically break the stone into smaller pieces. Reduction in size is generally accomplished in several crushing stages, as there are practical limitations on the ratio of size reduction through a single stage. Crusher selection is based on rock type, required size reduction, output rock shape and production rate. Details on the different available crusher designs are presented below.

- jaw crusher

Jaw crushers are typically used as primary crushers. A jaw crusher consists of a set of vertical jaws, one jaw being fixed and the other moving. The progressive compression by the back-and-forth motion of the moving jaw breaks the stone. Jaw crushers operate best when fullyloaded but not flood-fed.

- impact crusher

Impact crushers are typically used in the primary and secondary crushing stages, are well suited for softer rocks and can achieve reduction ratios of up to 40:1. Impact crushers tend to wear faster than other crushers because of constant high-velocity collision with the stone.

- cone crusher

Cone crushers are a type of gyratory crushers that are well suited for applications that require a reduction ratio of 6:1 and provide a tight control over the rocks leaving the crusher. They are typically applied in the secondary and tertiary crushing stages. For proper reduction and consistent product gradation, cone crushers must be choke fed at all times.

- mobile crusher

A typical quarry face will recede approximately 45 feet every year. This extra distance increases the work of the haul trucks that feed the primary crushers with the shot rock. Mobile crushers offer the option of crushing near the blast site and using efficient conveyors to supply the secondary crushing operations. Mobile crushers are also popular for projects with a limited project life.

Crusher Machine Selection and Application

Table below shows a generic crusher selection guide, as well as unloaded power draw.

The primary crushing stage is the most economical segment of the aggregate plant in which to make material reduction, after the initial quarry blast. Primary crushing involves reducing shot rock from 40-inch minus to 9-inch minus rock. The secondary and tertiary crushers reduce the stone from 9-inch minus to less than 2-inch rock size. Different stages of crushing are required based on the intended final product size. Typically, a greater number of crushing stages are required to get smaller rock sizes.