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Corundum Brick

Corundum bricks refer to refractory products with alumina content greater than 90% and corundum as the main crystal phase. The product has very high cold crushing strength, high wear resistance, high refractoriness under load (greater than 1700°C), and good chemical stability. It has strong corrosion resistance to acidic or alkaline slag, metal, and molten glass. There are two types of sintered corundum bricks and fused corundum bricks. Sintered alumina and fused corundum can be used as raw materials, or bauxite clinker with a high Al2O3/SiO2 ratio can be combined with sintered alumina and made by the sintering method.


Corundum bricks are mainly used in the iron and steel industry, glass industry and petrochemical industry, etc. In the iron and steel industry, it’s mainly used in ironmaking blast furnaces and hot blast furnaces, hot metal ladle and torpedo cars, refining furnaces, and sliding water heaters. It’s used as covers of glass melting furnace superstructure, burner bricks, forehearth, peep hole bricks, and forehearths in medium alkali borosilicate glass furnaces.

Item Behaviors
TY-G93 TY-G98
Chemical

Composition %

Al2O3 ≥93 ≥98
SiO2 ≤5.0 ≤0.2
Fe2O3 ≤0.1 ≤0.1
CaO ≤1.2 ≤1.2
Apparent Porosity (%) ≤17 ≤17
Bulk Density g/cm3 ≥3.15 ≥3.2
Cold Crushing Strength Mpa ≥100 ≥100
Modulus of Rupture at High
Temperature 1250℃ Mpa
≥9.5 ≥9.5
Refractoriness ℃ ≥1900 ≥1850
0.2Mpa Refractoriness Under Load T0.6 ℃ ≥1700 ≥1680
Permanent Linear Change on Reheating 1500℃×2h % ≤±0.2 ≤±0.2

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