Fire Resistance Al2O3-Sic-C Refractory ASC Bricks For Torpedo Tanks

Exported aluminum silicon carbide bricks usually use 60% of first-grade high-alumina bauxite clinker particles, 15% of first-grade high-alumina bauxite clinker fine powder, 10% of combined clay fine powder, 15% of silicon carbide fine powder, and aluminum phosphate. Or sulfite pulp waste liquid is a binder. According to a certain proportion and feeding sequence, it is fully mixed and evenly mixed in a wet mill, and formed by a friction brick press. After the green body is dried until the residual moisture is less than 0.5%, the impurity content in the raw materials used for sintering at 1350~1400℃ for 6~8h should be as little as possible, especially Fe2O3 has a great influence on the high temperature performance of the product. It is required that the SiC in the silicon carbide is greater than 93%. When the SiC content in the product is high, its thermal shock resistance is improved, but the compressive strength is reduced, and the slag resistance performance is also deteriorated. Because in the production of high-alumina silicon carbide bricks, the amount of silicon carbide fine powder is usually controlled below 30%, and most of them add about 15% and the amount of clay fine powder is below 20%, otherwise it will be more reduced. High temperature resistance of products.

In order to make the chemical composition of the matrix part of the product more uniform and easy to sinter, the bauxite clinker, the bonded clay and the silicon carbide raw materials are finely pulverized and ground to the required fineness to make a mixed fine powder, and then brick making