The invention relates to the field of
beneficiation and
metallurgy with a function of comprehensively recovering valuable components such as
vanadium, aluminum,
potassium and
silicon from the
vanadium-containing siliceous shale as a
raw material. The process comprises steps as follows: the low-grade
vanadium-containing siliceous shale is taken as the
raw material, firstly, the vanadium-containingsiliceous shale is desiliconized with a flotation method, vanadium
ore concentrate is uniformly mixed with excessive limestone and
sodium carbonate, a mixture is subjected to high-temperature roastingin a
rotary kiln, and products such as
potassium aluminate,
potassium ferrite,
calcium metavanadate,
calcium orthosilicate,
carbon dioxide and the like are obtained; the sintered products are dissolved in a dilute alkaline solution, after a
dissolution solution is desiliconized and purified,
carbon dioxide gas produced by the
rotary kiln is introduced into a closed container for
carbonization reaction, Al(OH)3 precipitates are separated out, a dealumination solution is subjected to hydrolytic
precipitation under the acidic condition, coarse vanadium is obtained and dissolved with alkali,
ammonium chloride is added,
ammonium metavanadate is obtained, a final solution is a potassium-rich and
sodium-rich solution and evaporated step by step, and
potash and soda are obtained. According to theinvention, the problem of environmental
pollution produced by stockpiling of stone
coal leaching residues is solved completely.