METHOD OF EXTRACTION OF VANADIUM BY CARBONIZED LEACHING OF VANADIUM SLAG AND REUSE OF MEDIUM Russian patent published in 2023 - IPC C22B34/22 C22B1/02 C22B3/12 C01G31/02 

FIELD: pharmaceuticals.

SUBSTANCE: invention relates to the extraction of vanadium by carbonized leaching of vanadium slag and reuse of the medium. Powdered clinker is prepared by burning and grinding vanadium slag after it is evenly mixed with a calcium-containing compound. A concentrated solution is prepared, after which vanadium is precipitated, while ammonium salt and EDTA sodium are added to the concentrated solution to precipitate vanadium, the solid and liquid are separated to obtain a supernatant liquid for the precipitation of vanadium and ammonium metavanadate, which is oxidized and calcined to obtain divanadium pentoxide. The vanadium precipitation supernatant is heated to obtain a deamination solution and mixed gas. The mixed gas is condensed to produce ammonia-containing condensate and condensed gas. To absorb ammonia, the condensed gas is introduced into a phosphoric acid solution and/or ammonium phosphate solution. A three-stage absorption of condensed gas is carried out.

EFFECT: method allows to reduce solid waste from water treatment and reuse the medium.

10 cl, 1 dwg, 3 tbl, 3 ex