PROCEDURE FOR PROCESSING TITANIUM-MAGNETITE CONCENTRATE Russian patent published in 2010 - IPC C22B34/12 C22B3/10 

FIELD: metallurgy.

SUBSTANCE: procedure for processing titanium-magnetite concentrate consists in leaching concentrate with sulphuric acid and heating in presence of metal iron, in transfer of iron and vanadium into leaching solution and in concentrating titanium in residue. Further, solution is evaporated; iron containing residue is extracted and subjected to pyrolysis producing iron oxide and regenerated hydrochloric acid. Titanium containing residue is dried and baked producing a titanium product. Also titanium-magnetite concentrate is leached at concentration of hydrochloric acid of 15-19% and temperature 95-105°C. Iron-vanadium product in form of sediment of iron and vanadium hydroxides is settled from leaching solution by means of processing with ammonia solution at pH 2.4-2.8; there is produced iron chloride solution (II). Produced iron chloride solution is evaporated; iron containing sediment is extracted and the left sediment is subjected to pyrolysis. Titanium containing sediment is baked at temperature 700-800°C.

EFFECT: production of pure iron oxide (Fe₂O₃ not more than 99,3 wy %).

3 cl, 1 tbl, 6 ex