Method of isolating alkali metal and titanium values from red slime and similar materials

摘要

Alkali metal salts and titanyl sulphate are obtained by fusing red slime or a similar raw material in a reducing atmosphere with limestone and anhydrite, recovering alkali metals in form of a sublimate, separating iron, cooling the slag, leaching out aluminium oxide with alkali, and treating the residue which contains a high temperature modification of perowskite (CaO.TiO2) with sulphuric acid to obtain a titanyl sulphate solution.