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What is the difference between the state of activated alumina powder and high temperature alumina powder

Release date: 2019-10-21 Views: Article source: Henan Ruishi Group

Introduction: High temperature alumina powder is made of industrial aluminum hydroxide and bauxite, molecular sieves and grinding balls. It is calcined in a tunnel kiln for a long time at high temperature. During the smelting process, carbon in anthracite removes
High temperature alumina powder is made of industrial aluminum hydroxide and bauxite, molecular sieves and grinding balls, and is calcined in a tunnel kiln for a long time at high temperature. During the smelting process, carbon in anthracite reduces impurities such as silicon oxide (SiO2), iron oxide, and titanium oxide in alumina to metals. These metals combine to form an iron alloy, which is settled to a higher density than corundum The furnace bottom is separated from the corundum melt.

High temperature alumina powder has strong anti-breaking ability, anti-oxidation, anti-corrosion, good chemical stability, and is a kind of abrasive with wide application.

Activated alumina powder is an abrasive obtained by melting and recrystallizing in an electric arc furnace with industrial aluminum hydroxide powder as a raw material. Impurities in the raw materials are not excluded during the smelting process. Therefore, 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%, its hardness is higher than that of high-temperature alumina powder, but its brittleness is greater.

It has good cutting, oxidation and gas corrosion resistance, and has good insulation. Mainly used for fine grinding and fine grinding of quenched steel and alloy steel, grinding thread and gear, etc. Activated alumina powder can also be used for precision casting and advanced refractory materials.

Related Reading

Raw materials: bauxite raw ore equipment: bauxite kiln, smelting furnace, sand production line, magnetic separation equipment, mill, laboratory equipment finished products: refractory raw materials and abrasives two series specifications: aggregate: 0-1,1-3, 3-5,5-8
Abrasive: F12-F1200
Principle: The raw bauxite ore is fired into alumina bauxite through an alumina kiln, smelted into an alumina corundum by electric arc furnace electricity smelting, and then crushed into sand by a crushing device, and processed by a mill and a magnetic separator.

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