What Is The Difference Between The Status Of Active Alumina Powder And High Temperature Alumina Powder

High temperature alumina powder is made of industrial aluminum hydroxide and bauxite, molecular sieve and grinding ball as raw materials, and is calcined at high temperature for a long time in the tunnel kiln. During the smelting process, the carbon in the anthracite reduces impurities such as silicon oxide (SiO2), iron oxide and titanium oxide in the bauxite to metals, which are combined to become ferroalloys, which settle to the bottom of the furnace and separate from the corundum molten liquid due to its density.
High temperature aluminum oxide powder has strong crushing resistance, oxidation resistance, corrosion resistance, and good chemical stability, and is a widely used abrasive.

Active aluminum oxide powder is an abrasive made from industrial aluminum hydroxide powder which is heated and melted and recrystallized in electric arc furnace. Impurities in the raw materials are not excluded in the smelting process, so the quality of activated alumina is closely related to the purity of the raw materials. The content of A12O3 in activated alumina should be above 99.5%, and its hardness is higher than that of high-temperature aluminum oxide powder, but it is brittle.

It has good cutting, oxidation resistance and gas corrosion properties, and has good insulation. Mainly used for hardening steel, alloy steel fine grinding and fine grinding, grinding threads and gears, active aluminum oxide powder can also be used for precision casting and high-grade refractory materials.