ELECTROCHEMICAL RECOVERY OF ZINC FROM NH4CI LEACHING SOLUTION OF ZnO

机译：ZnO的NH4Cl浸出溶液电化学回收锌。

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Ammonium chloride leaching and electrowinning were used for dissolution of ZnO and recovery of zinc metal as a part of recycling research program of electric arc furnace dust. The effects of process variables were evaluated by factorial design experiments. The leaching was greatly affected by concentration of NH4CI. Zn(NH_3)_2Cl_2 was precipitated when solution temperature was lowered after leaching. Adding ammonia in the leaching solution prevent the precipitation at low temperature below 50℃. The current efficiency of electrowinning was steeply increased in proportion to current density at low current densities. In the process region over the current efficiency of 80%, ammonia content in electrolyte had a great effect on current efficiency.

机译：作为电弧炉粉尘回收研究计划的一部分，氯化铵浸出和电解沉积用于溶解ZnO和回收锌金属。过程变量的影响通过析因设计实验进行了评估。 NH4Cl的浓度极大地影响了浸出。浸出后降低溶液温度会使Zn（NH_3）_2Cl_2沉淀。在浸出液中加入氨水可防止50℃以下的低温下析出。在低电流密度下，电解沉积的电流效率与电流密度成比例地急剧增加。在电流效率超过80％的过程区域中，电解液中的氨含量对电流效率有很大影响。

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来源
《Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES)》|2004年|P.1893-1899|共7页
会议地点 Madrid(ES)
作者
Min-Seuk Kim; Jae-Chun Lee; Byung-Su Kim; Jae-Min Yoo; Young-Yoon Choi; Jin-Tae Park;
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作者单位

Korea Institute of Geoscience and Mineral Resources 30, Kajung-dong, Yusung-gu, Daejon, Korea, 305-350;

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原文格式 PDF
正文语种 eng
中图分类废物处理与综合利用;
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4. ELECTROCHEMICAL RECOVERY OF ZINC FROM NH4CI LEACHING SOLUTION OF ZnO [C] . Min-Seuk Kim, Jae-Chun Lee, Byung-Su Kim, Global Symposium on Recycling, Waste Treatment and Clean Technology . 2004

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ELECTROCHEMICAL RECOVERY OF ZINC FROM NH4CI LEACHING SOLUTION OF ZnO

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