METHOD OF RECOVERING VANADIUM FROM NATURAL-ALLOYED VANADIUM CAST IRON Russian patent published in 2018 - IPC C21C5/28 C21B3/06 C21C5/36 

FIELD: metallurgy.

SUBSTANCE: at the first stage of duplex process involving pouring of vanadium liquid cast iron into a converter, blowing with oxygen and introducing into converter coolers in the form of iron-containing iron briquette for devanadation of cast iron in amount of 20-100 kg/t of cast iron. The briquette for devanadation of cast iron is made by method of cold briquetting of iron-containing gas cleaning waste-slimes of blast-furnaces or converters 20-40%, oil scale of secondary settlers 5-30%, roll scale 30-60% and contains sodium liquid glass as a binder, wherein the total content of iron in the briquette should be 65%, and the content of CaO is not more than 1.5%.

EFFECT: disposing metallurgical production waste, preparation of vanadium slag conditioned by chemical composition and provision of deep extraction of vanadium from pig iron into commercial vanadium slag with required chemical composition.

3 tbl