METHOD FOR PROCESSING SPHENE CONCENTRATE Russian patent published in 2008 - IPC C01G23/00 C22B3/08 

FIELD: chemistry.

SUBSTANCE: method for processing sphene concentrate implies disintegration of concentrate, hot decomposition thereof with diluted sulphuric acid to dissolve titanium and to precipitate calcium and silicon, isolation of titanium-containing solution, treatment thereof with phosphoric acid resulting in titanium phosphate precipitation, and treatment of calcium-silicon precipitate. Concentrate is disintegrated down to size of not more than 10 mcm. Prior to treatment of titanium-containing solution with phosphoric acid, ammonium sulphate is added to the solution in amount providing for precipitation of not more than 85% of titanium, resulting precipitate is isolated and washed with saturated solution of ammonium sulphate, which results in titanium binary salt. The solution remaining after the precipitate isolation is treated with 50-70% phosphoric acid, and titanium phosphate precipitate is washed with diluted phosphoric acid.

EFFECT: increase in degree of titanium recovery from sphene concentrate and degree of sphene concentrate utilisation.

5 cl, 4 ex