Material Composition of High Purity Corundum Refractory Castable
High-purity corundum insulating castable refractory in the large and medium-sized ultra-high power electric furnace cover triangle and LF refining steel bag cover applications such as the service life of a considerable or more than the level of imported materials to reduce business costs, but also convenient for users. The following table shows the properties of high purity corundum insulation clay brick castables. Table 1 to 3 using fused white corundum as refractory aggregate and some powder; No. 4 to 5 respectively, using corundum and dense corundum as refractory aggregate, with dense corundum as part of the magnesia carbon refractory refractory powder; No. 6 using high-grade high-alumina aggregate and white corundum aggregate for casting refractories aggregate, with white corundum powder to do refractory powder. Fire-resistant powder were steel plant refractories added in the amount of calcined alumina powder and activated silica powder; 1 CA-80 cement as binder, and the rest with CA-70 cement as binder. At the same time, both dispersant and water reducing agent were added. Such cement is generally easy to quick-setting, affecting the construction. In this case, should be added oxalic acid and sodium citrate and other retarder to ensure the castable fluidity and compactness. As can be seen from the table, the total content of Al2O3 and CaO out of the number 4 and 6 are greater than 95%, high up to 98.7%, indicating that the material is high purity. At the same time, the volume density, high strength, but the 1500 ℃ or 1600 ℃ burning line after the change in the number 3 and 4, were in a state of contraction.
Yingkou Ruizhi Refractories Co., Ltd. is a professional manufacturer of refractory material for high temperature melting furnaces.Ruizhi Refractories’ main products are: Refractory material for converter, electric arc furnace, ladle, LF furnace, tundish, foundry ladle, torpedo ladle, etc. Shaped refractories. Ruizhi Refractories products have been exported to Indonesia, Iran, America, Canada, etc.