Synthesis of hydrocarboaluminates of alkali earth metals from natural magnesium-containing feedstock in conditions of alumina production

Abstract

The results of investigations into the synthesis kinetics of magnesium hydrocarboaluminates are presented and the key role of the preliminary temperature activation of the magnesium component of the feedstock and temperature in the process rate is determined. The mechanism and conditions of the cocrystallization of calcium and magnesium hydrocarboaluminates from preliminarily activated natural Mg-containing feedstock are investigated. A high reaction ability of hexagonal structures of synthesized substances is established. An apparatus-and-process flowsheet of the synthesis process of hydrocarboaluminates of alkali earth metals in conditions of alumina production is proposed.