The composite brown corundum brick is made of brown corundum and silicon carbide as main raw materials, with special additives added, molded, finely ground after firing and delivered after pre assembly. It has the characteristics of good alkali resistance and low dissolution rate of slag. It is applicable to the bottom, hearth ceramic masonry, tuyere, iron port, slag port and other parts of blast furnace with different furnace capacities. Stainless steel, surface decontamination, welding slag removal and matte effect; iron workpieces, rust removal, decontamination, deoxidization skin, increase the adhesion of coating and coating; aluminum workpieces, oxide skin removal, surface strengthening, polishing effect; surface decontamination, welding slag removal and matte effect; iron workpieces, rust removal, decontamination, deoxidization skin, increase the adhesion of coating and coating; aluminum workpieces, oxide skin removal, Surface strengthening and polishing;

Project	Indicators
AL2O3/%	≥78
SiC,%	≥14
Fe2O3/%	≤1.0
bulk density g/cm3	≥2.9
Apparent porosity %	≤15
Normal temperature compressive strength MPa	≥100
0.2MPa load softening start temperature ℃	≥1660
Change rate of reheating line（1500℃×3h）	0-+0.2
Thermal expansion rate（1000℃）	0-+0.5
Slag corrosion resistance	≤10
Compressive strength after alkali resistance test	≥70