Microcrystalline Fused Alumina

Microcrystalline corundum is a derivative of brown corundum, similar to brown corundum in appearance, color and chemical composition, and is obtained by changing the cooling crystallization method of corundum. The abrasive grains are polymerized from fine crystals and are tough, strong and self-sharpening. The abrasives made of microcrystalline corundum are suitable for grinding stainless steel, carbon steel, ductile cast iron, etc. The grinding method is suitable for molding grinding, plunge-cut grinding, fine grinding and heavy duty grinding.

Product Introduction

microcrystalline corundum used raw materials and smelting methods and brown corundum is basically the same, is bauxite as the main raw material, high temperature melting, through the rapid cooling of the crystallization mode and obtain, in the furnace immediately after the stopping of the molten liquid through the flow of the discharge or pouring method of pouring into the branches of the mold cooled rapidly (generally within 30 minutes), and thus get the collection of micro-fine crystals. Microcrystalline corundum in the smelting process, the degree of reduction of impurities is poor, the Al2O3 content of 94~96%, the crystal size is generally in the 80~300 microns, crystals accounted for 57~85% of the maximum crystal size does not exceed 400~600 microns.

Scope of application 

grinding ,sandpaper and grinding wheel

 Performances and Usages 

It is characterized by high strength and high toughness. It is suitable for heavy load grinding, and can grind stainless steel, carbon steel, bearing steel and special ductile iron, etc. As the abrasive grains are micro-edged and broken during the grinding process, it is also used for precision grinding and even mirror grinding.

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