METHOD OF EXTRACTION OF VANADIUM OUT OF AFTER BURNING WASTE OF SULPHURIC BLACK OIL Russian patent published in 2008 - IPC C22B34/22 C22B1/04 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: invention refers to non-ferrous metallurgy and can be used for extraction of vanadium out of ashes which is waste produced by burning of sulphuric vanadium containing black oil in heat engines of heat and hydropower stations. The method consists in the following: source ashes are mixed with sodium carbonate and water at a weight ratio of 100:(10-60):(30-50), then produced mixture is held at temperature of 100-150°C, preferably 115-120°C, during 2 hours. Vanadium is leached out of produced self-diffusing cake with water at temperature of 95-100° and a ratio of liquid: solid = (1.5-3):1.

EFFECT: avoiding of generating harmful gas exhausts at extraction of vanadium and implementation of available equipment.

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