METHOD OF PROCESSING VANADIUM CONTAINING IRON-TITANIUM CONCENTRATE Russian patent published in 2017 - IPC C22B34/22 C22B34/12 C22B1/02 C22B3/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of processing vanadium-containing iron-titanium oxide concentrate. Charge is formed from concentrate and sodium chloride. Charge is ground. Further, method comprises thermal treatment at 800–1,200°C in presence of oxygen to form a sinter. Sinter is ground and leached with water with transfer into solution 1 of sodium salt of vanadium and formation of primary leaching residue, containing undissolved compounds of vanadium, iron and titanium. Vanadium-containing solution is separated from primary residue, which is treated with solution of reagent, containing sulphur (IV), to form a solution 2, containing sodium salt of vanadium (IV). Obtained secondary residue is treated with sulphuric acid solution to form a solution of 3 and tertiary iron-titanium-containing residue. Produced solutions 1, 2 and 3 are combined, neutralised to pH 7–8 with precipitation of a mixture of salts. Tertiary residue is reduced at 1,100–1,300 °C to obtain iron-containing and titanium oxide concentrate. Method employs cheaper and readily available reagents.

EFFECT: method increases degree of extraction of iron and titanium oxide.

6 cl, 2 dwg, 6 ex