Aluminium-silicon carbide-carbon refractory material

Abstract

The alumina-silicon carbide-carbon refractory material includes alumina, silicon carbide and graphite on the carrier of bauxite, brown corundum and white corundum. The present invention features that waste furnace lining is crushed and impurity eliminated to obtain recovered material, which is used to replace partial new material of bauxite, brown corundum and white corundum. The added amount of the recovered material is based on the total alumina content in the refractory material not more than 30 %, and the recovered material has grain size up to 8 mm and water content not higher than 0.5 %. The present invention solves the technological problem of using partial waste alumina-silicon carbide-carbon brick to replace new material while ensuring the normal campaign life.

Description

Technical field: [0001] The invention relates to a refractory material for molten iron pretreatment smelting containers, especially a refractory material utilizing waste. Background technique: [0002] In order to achieve the purification, upgrading and cost reduction of steelmaking, steel mills adopt the molten iron pretreatment method, that is, the molten iron is sent from the blast furnace to the furnace steel furnace for pretreatment such as desiliconization, dephosphorization and desulfurization, and the container used for pretreatment (such as mixed iron cars, ladles, torpedo tanks) lining refractory materials must consider the erosion caused by the above pretreatment. The unburned brick made of aluminum-silicon carbide-carbon refractory is an excellent refractory material because of its good chemical corrosion resistance, thermal shock resistance, mechanical erosion resistance and wear resistance. It replaces the previously used dense Clay bricks and mullite bricks, ...

AI Technical Summary

Problems solved by technology

After reaching the age of the furnace, the treatment container needs to be repaired, and the old inner lining that has been dismantled is discarded. In the long run, these discarded refractory materials are piled up like a mountain, which not only occupies land, but also causes environmental pollution, becoming a big burden for steel enterprises

On the other hand, the refractory material factory is disturbed by the rise in raw material prices and production costs, and on the contrary, the sales price of products has been suppressed and dropped.