Abstract
The physicochemical processes of the fluoride processing of aluminum ores with ammonium hydrodifluoride were studied theoretically and experimentally. The kinetics of the sintering of raw materials, the sublimation of ammonium hexafluorosilicate, and the formation of aluminum fluoride and alumina are described. The rate constants and activation energies of the chemical reactions were determined. As a result of the investigations, a rational chemical and metallurgical method for alumina production from different aluminum ores with the complex extraction of other useful components has been developed.
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