High alumina bauxite is a natural high bauxite by product after high temperature calcination. Natural bauxite is mainly composed of three kinds of aluminum hydroxide and aluminum silicate minerals. Three kinds of aluminum hydroxide for diaspore (diaspore, gibbsite, boehmite) (boehmite, wave brucite, gibbsite) and gibbsite (water stone, stone, aluminum hydroxide, aluminum hydroxide gibbsite).