Corundum-silicon nitride-silicon carbide composite pouring material

Abstract

The invention discloses a corundum-silicon nitride-silicon carbide compound castable used for a blast tuyere zone of an ironmaking blast furnace. The corundum, the silicon nitride, the silicon carbide, aluminate cement, aluminum powder, silicon metal, ultrafine silica powder, alumina powder and polypropylene fiber are mixed to form the castable. Residual brick of compound brown corundum refractory brick can be fast poured and repaired at the blast tuyere zone of the ironmaking blast furnace. When building a blast furnace, residual brick can be direct poured and formed to replace the compound brown corundum refractory forming brick and no high temperature is needed to fire during the production process; therefore, the invention is also an energy saving refractory for the blast tuyere zone of the ironmaking blast furnace and cast-place construction is not limited by space; fast pouring masonry is carried out and fast drying method is adopted, thereby being an inorganic nonmetal refractory applied to fast-drying quick furnace building and repairing during the blast furnace repairing and the tuyere zone of the newly-built blast furnace. The invention can normally furnace dry with the blast furnace.

Description

technical field [0001] The invention relates to an inorganic non-metallic refractory material for the tuyere belt of an ironmaking blast furnace, in particular to an inorganic non-metallic refractory material containing silicon nitride, silicon carbide, aluminate cement, metal aluminum powder, metal silicon, silicon micropowder, aluminum micropowder, poly Unshaped refractory castable mixed with acrylic fiber. technical background [0002] At present, the blast furnace tuyere belt is built with composite brown corundum refractory bricks, which are formed products in refractory materials. When composite brown corundum refractory bricks are used in the blast furnace tuyere for a period of time, it needs to be repaired. During the repair process, the blast furnace tuyere belt is made of composite brown corundum Corundum refractory bricks have residual safety thickness or irregularly shaped residual bricks that are greater than the safe thickness. If new shaped composite brown co...

AI Technical Summary

Problems solved by technology

[0002] At present, the blast furnace tuyere belt is built with composite brown corundum refractory bricks, which are formed products in refractory materials. When composite brown corundum refractory bricks are used in the blast furnace tuyere for a period of time, it needs to be repaired. During the repair process, the blast furnace tuyere belt is made of composite brown corundum Corundum refractory bricks have residual safety thickness or irregularly shaped residual bricks that are greater than the safe thickness. If new shaped composite brown corundum refractory bricks are used for repair, because the refractory lining of residual bricks has irregular shape and uneven thickness, it must be repaired. Repairs can only be carried out after all the remaining bricks are removed, which will cause a lot of waste of refractory resources. At the same time, molded products need to be shaped and fired again, resulting in energy waste due to the long production cycle

Therefore, composite brown corundum refractory bricks need to be shaped, fired, cut and ground, and pre-built. These cumbersome processes cause the production cycle to be too long, which is not conducive to rapid building and repairing.