A method of soaking cadmium-containing waste acid solution in acid to prepare wrapped pure yellow pigment
The technology of yellow pigment and waste acid solution is applied in the field of preparing packaged pure yellow pigment by soaking cadmium-containing waste acid solution in acid, which can solve the problems of environmental pollution and difficult treatment, and achieves reduction of pollution, cost reduction and high utilization rate. Effect
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[0043] A method for direct recycling of waste acid solution containing cadmium and selenium after acid soaking, using zirconium oxychloride, sodium hydroxide, zinc sulfate and sodium sulfide to treat waste acid solution containing cadmium and selenium after acid soaking in the production of wrapped color materials; Zirconia and zinc sulfate are mixed with acid-soaked cadmium-containing and selenium-containing waste acid solution to prepare an acidic mixed solution, and then sodium hydroxide and sodium sulfide are added to prepare an alkaline mixed solution according to the required amount, and then the acidic mixed solution is added to the alkali In the neutral mixed solution, after a co-precipitation chemical reaction occurs by stirring, it is washed by pressure filtration, dried, mixed evenly with mineralizer and white carbon black, and then calcined, and the calcined product is subjected to acidification, ball milling, pressure filtration, and water washing and drying to obt...
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