Tabular Corundum Refractories Are Mainly Used

Tabular corundum refers to the corundum obtained by sintering method, which also includes the kind of tabular corundum. Fused corundum is made by smelting bauxite or industrial alumina in an electric arc furnace at 2000 ~ 2400℃. The main types of fused corundum used in furnace refractory industry are white corundum, compact corundum, sub-white corundum and brown corundum.

Tabular corundum is a kind of granular crystalline corundum material produced by different sintering processes, also known as sintered alumina. It has the advantages of high purity (Al2O3 > 99%), density, high thermal conductivity, good thermal shock resistance and erosion resistance, and high single particle strength. In recent years, its application in the domestic refractory industry has gradually expanded.

According to the different materials used, sintered corundum can be divided into alumina sintered corundum and alumina sintered corundum. The main raw material of sintered corundum is high bauxite. It is generally selected bauxite after calcination, crushing, wet ball grinding, molding and high temperature calcination, mainly used in abrasive industry, refractory materials rarely used.

The sintered corundum used in refractory materials refers to alumina sintered alumina sintered corundum made of high quality alumina as raw material at high temperature. It is generally considered in the kiln that the sintered alumina with Al2O3 content of 99.3%-99.7%, true density of 3.9g/cm3, volume density of 3.4g/cm3 and porosity of less than 2% is sintered corundum used as refractory material.