FIELD: inorganic compounds technology. SUBSTANCE: vanadium-containing industrial products are treated with alkali reagent, insoluble precipitate is separated and washed. Industrial water is combined with filtrate and ammonium-containing mineral compounds are added to combined solution to form ammonium metavanadate, which is separated from solution in the form of crystals by filtration, washed, dried, and calcined to give desired product. According to invention, addition of ammonium-containing mineral compounds to solution is preceded by dissolving therein sodium and/or potassium chloride (halite or selenite) to achieve their summary concentration between 50 and 350 g/cu. dm. In addition, mother solution after separation of ammonium metavanadate is divided in half and ammonium-containing mineral compounds, for example ammonium chloride or nitrate, are added to 20-50% mother solution to form saturated chloride salt solutions, which are further added to sodium metavanadate solution. EFFECT: increased degree of vanadium recovery and simplified detoxification of waste waters. 3 cl, 2 ex
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机译：领域：无机化合物技术。物质：含钒的工业产品用碱试剂处理，分离不溶的沉淀物并洗涤。将工业用水与滤液合并，并将含铵的矿物化合物添加至合并的溶液中，以形成偏钒酸铵，将其通过过滤从晶体形式的溶液中分离出来，进行洗涤，干燥和煅烧，从而获得所需的产品。根据本发明，在向溶液中添加含铵的矿物化合物之前，先在其中溶解氯化钠和/或氯化钾（卤石或亚硒酸盐），以使其总浓度在50至350g / cu之间。 dm。此外，将偏钒酸铵分离后的母液分为两半，将含铵的矿物化合物（例如氯化铵或硝酸铵）添加到20-50％的母液中以形成饱和的氯化物盐溶液，然后将其进一步添加到钠中。偏钒酸溶液。效果：提高钒的回收程度并简化废水的排毒过程。 3 cl，2 ex
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