Corundum-silicon nitride-silicon carbide composite pouring material

Abstract

The invention discloses a corundum-silicon nitride-silicon carbide composite castable for iron-making blast furnace tuyeres. The castable is composed of corundum, silicon nitride, silicon carbide, aluminate cement, metal aluminum powder, metal Silica, silica micropowder, alumina micropowder, and polypropylene fiber are mixed, which realizes rapid pouring and repairing of the remaining bricks with composite brown corundum refractory bricks at the tuyere of the blast furnace. Corundum refractory shaped bricks do not need to be fired at high temperatures during the production process, so they are also an energy-saving refractory material for blast furnace tuyere belts. The pouring construction is not limited by the construction space, and can be poured and masonry quickly. Normal furnace is an inorganic non-metallic refractory material for quick-drying and rapid furnace construction and repair for blast furnace repair and new blast furnace tuyere belt.

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.