METHOD OF PROCESSING OF SUBLIMATES OF TITANIUM CHLORINATORS Russian patent published in 1998 - IPC

FIELD: nonferrous metallurgy, particular, methods of processing of sublimates of titanium chlorinators. SUBSTANCE: the offered method includes dissolving to produce pulp; treatment of pulp with alkali reagent; separation of precipitate of mixture of hydroxides; treatment of solution with alkali reagent to produce iron-oxide pigments; filtering; washing and drying. Pulp after leaching of wastes is treated with reducing agent for reduction of iron (III) into iron (II). Treatment of pulp with alkali reagent is carried out at pH 4-5. Aluminum from formed hydroxide is recovered by repulpation in solution of sodium hydroxide with concentration of 30-120 g/cu.dm with liquid-solid ratio determined by the formula given in the invention description, with subsequent treatment of obtained solution with mineral acid up to pH 6-8, separation of precipitate, its washing and drying. Solution is treated with alkali reagent in production of iron-oxide pigment in the presence of oxygen-containing gas with pH 2.5-3.5. EFFECT: higher efficiency. 6 tbl