METHOD OF OBTAINING TITANIUM CONCENTRATES WITH HIGH CONTENT OF TiO AND LOW CONTENT OF RADIONUCLIDE ELEMENTS FROM ANATASE CONCENTRATES OBTAINED FROM MECHANICAL PREPARATION Russian patent published in 2009 - IPC C01G23/47 C22B34/12 C22B3/10 C22B3/22 

FIELD: chemistry.

SUBSTANCE: method of obtaining titanium concentrates involves processing anatase concentrates obtained from mechanical preparation in the following sequence: burning (A), reduction with gas (B), magnetic separation of the reduced product in a weak field (C), magnetic separation in a strong field of the non-magnetic fraction, obtained from magnetic separation in a weak field (D), leaching the product of magnetic separation in a strong field with hydrochloric acid (E), filtration and dehydration of the leached product, high-temperature oxidation of the dehydrated material (F), water hardening of the oxidation product (G), leaching the hardened product with hydrochloric acid (H), filtration and drying of the product of second leaching and magnetic separation in a strong field (I). The non-magnetic fraction of the last magnetic separation becomes the final product. Alkaline solution from first and second leaching is fed into a device for extracting rare earth elements and recycling HCl (J).

EFFECT: reduced content of radionuclide elements in titanium concentrates.

8 cl, 1 dwg, 4 tbl, 4 ex