Method for preparing cadmium phosphide from copper-cadmium slag
The invention relates to a method for preparing cadmium phosphide by using copper-cadmium slag, which comprises the following steps: (1) oxidizing and acid leaching: mixing the copper-cadmium slag, ammonium dichromate and water, stirring to react, controlling the pH value at the end point to be 5-5....
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| creator | YAO YINGFENG FANG YANXIA WU KEFU WANG YUANRUI SUN SHUAINAN WANG YAPING MA JIANFEI ZHANG YANCUI ZHAN ZHIWANG WANG HONGYAN GUO YONGHONG PANG ZHENYE NIU YONGSHENG GONG YANFEI YANG YANG |
| description | The invention relates to a method for preparing cadmium phosphide by using copper-cadmium slag, which comprises the following steps: (1) oxidizing and acid leaching: mixing the copper-cadmium slag, ammonium dichromate and water, stirring to react, controlling the pH value at the end point to be 5-5.2, and performing solid-liquid separation to respectively obtain a mixed solution of zinc sulfate and chromium sulfate and a solid phase; (2) zinc and chromium separation: adding ammonia water into the mixed solution of zinc sulfate and chromium sulfate for chromium precipitation reaction to respectively obtain a [Zn (NH3) 4] (OH) 2 solution and a mixed precipitate of chromium hydroxide and chromium oxysulfate; (3) copper and cadmium separation: adding a sulfuric acid solution and water into the solid phase for acid leaching reaction to respectively obtain a cadmium sulfate solution and copper slag with the copper content of more than 90%; and (4) preparing cadmium phosphide: pumping the cadmium sulfate solution in |
| format | Patent |
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(2) zinc and chromium separation: adding ammonia water into the mixed solution of zinc sulfate and chromium sulfate for chromium precipitation reaction to respectively obtain a [Zn (NH3) 4] (OH) 2 solution and a mixed precipitate of chromium hydroxide and chromium oxysulfate; (3) copper and cadmium separation: adding a sulfuric acid solution and water into the solid phase for acid leaching reaction to respectively obtain a cadmium sulfate solution and copper slag with the copper content of more than 90%; and (4) preparing cadmium phosphide: pumping the cadmium sulfate solution in</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Method for preparing cadmium phosphide from copper-cadmium slag |
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