Method for controlling cadmium precipitation through zinc powder replacement through potential

The invention discloses a method for controlling cadmium precipitation through zinc powder replacement through potential. The method comprises the following steps that A, copper and cadmium slag is subjected to acid leaching, and a replacement pre-liquid is obtained; B, zinc powder is added to the r...

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Bibliographische Detailangaben
Hauptverfasser:	ZENG PENG, SHENG JUN, WU HAIYAN, ZHANG SHAOBO, WANG QIUYIN, QIU WEIJIA, JIANG YAN, LI GUOFENG, CHEN GUOMU, WANG NA, ZHOU ZHONGHUA, LIU XUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses a method for controlling cadmium precipitation through zinc powder replacement through potential. The method comprises the following steps that A, copper and cadmium slag is subjected to acid leaching, and a replacement pre-liquid is obtained; B, zinc powder is added to the replacement pre-liquid for primary replacement, and sponge cadmium and a primary replacement post-liquid are obtained; the zinc powder addition amount in the primary replacement process is controlled by the aid of potential; C, the zinc powder is added to the primary replacement post-liquid for secondary replacement, and secondary replacement slag and a lean cadmium liquid are obtained; and the zinc powder addition amount in the secondary replacement process is controlled by the aid of potential.According to the method, the process of cadmium precipitation through zinc powder replacement is controlled through the potential, the electrochemical principle is sufficiently utilized, and the replacement reaction endpoint