Increase in the Slag Resistance of Refractories Based on the Al_2O_3-SiC-SiO_2 System

摘要

The technology for manufacturing corundum-carbide-silicon refractories with increased slag resistance has been developed. It is shown that one of the directions for improving the quality of carbon-containing products is the creation of protective antioxidant coating on the surface of particles. A dense protective film is formed during the processing on the surface of carbon-containing particles. The coating does not break down when heated to the melting temperature of steel. Therefore, the number of heat-conducting particles in the bond can be increased without the risk of loss of strength. An increase of the number of high-heat-conducting particles reduces the value of the temperature gradient inside the refractory and reduces the zone impregnated with the melt. A technique has been developed that makes it possible to determine the degree of interaction of a refractory with metal (slag) in ground samples under the binocular microscope MBS-9. The proof of high slag resistance is the depth of penetration of metal and slag into the structure of the sample by not more than 1 to 2 mm without changing the lateral surface of the conical hole.