Process for extracting vanadium by acid leaching of stone coal
A stone coal acid and leaching technology, which is applied in the direction of improving process efficiency, can solve the problems of affecting vanadium recovery rate, high production cost, and large reagent consumption, so as to achieve low vanadium loss, good product quality, and low reagent consumption. little effect
Inactive Publication Date: 2010-06-30
CENT SOUTH UNIV
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The invention provides a process for extracting vanadium by acid leaching of stone coal. The process mainly comprises the following steps of: removing aluminum from crystal aluminum sulfate ammonium vanadium obtained from acid leaching solution of stone coal, performing selective oxidation and adjustment of a pH value of the solution obtained after the aluminum removal to remove iron, performing oxidizing transformation of vanadium in the solution obtained after the iron removal, adsorbing the vanadium in the transformed solution by anion exchange resin, desorbing and regenerating the vanadium-loaded resin, performing ammonium salt precipitation of the vanadium-desorbing solution, performing pyrolysis of ammonium metavanadate, transforming the aluminum sulfate ammonium vanadium and the like. The process has the advantages of short flow, little consumption of reagent, high vanadium recovery rate, low production cost, good product quality and the like.
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