Brown corundum material

Corundum high quality bauxite as raw material, anthracite, iron Xiao, in the arc by ? ? ? ? degrees above the melting temperature is made by crushing ? plastic from the mill, magnetic separation to iron, screening a variety of granularity, which dense texture, high hardness, formation of spherical particles, for the manufacture of pottery ? porcelain, resin, high abrasive grinding, polishing, sandblasting, precision casting, etc., can also be used to manufacture advanced refractories. Main component is alumina corundum, graded to distinguish it from aluminum content, the lower aluminum content will lower the hardness of it.