Views: 125 Author: SEPPE Publish Time: 2022-09-14 Origin: SEPPE
An impure mixture of aluminous minerals. There are four basic grades of bauxite- Chemical grade- (55-58% min. pure), Abrasive grade- (55% min. pure), Refractory grade- (59-61% min. pure) and Metallurgical grade- (50-55% min. pure). Bauxites are typically classified according to their intended commercial application: metallurgical, abrasive, cement, chemical and refractory.
The name bauxite is applied to earthy deposits and rock principally composed of one or more hydrated aluminum oxide mineral species. Bauxite contains a large number of impurities such as silica, iron and titanium oxides, and various other elements mostly in minor or trace amounts.
The hydrated aluminum oxide minerals are gibbsite, boehmite and diaspore. Both boehmite and diaspore are monohydrate and have the same chemical compositions, but diaspore is harder and has a higher specific gravity than boehmite. Gibbsite is an aluminum trihydrate mineral.
Production of alumina, refractories, abrasives, chemicals, castables, plastics, and cement. Bauxite should have a positive future as an industrial mineral in minor applications like for use as a proppant.
