Leaching of chalcopyrite with ferric ion.: Part II:: Effect of redox potential
Leaching of chalcopyrite with ferric ion.: Part II:: Effect of redox potential
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DOI：
10.1016/j.hydromet.2008.04.016
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发表时间：
2008-08-01
期刊：
影响因子：
4.7
通讯作者：
Ballester, A.
中科院分区：
文献类型：
--
作者：
Cordoba, E. M.;Munoz, J. A.;Ballester, A.
本文报道了氧化还原电位（或 Fe3+/Fe2+ 比）对黄铜矿浸出的影响。还评估了氧化还原电位与其他变量（铁浓度和温度）之间的关系。浸出测试在搅拌锥形瓶中用 0.5 g 纯黄铜矿和 100 mL Fe3+/Fe2+ 硫酸盐溶液进行。在 pH 1.8、180 rpm、温度为 35°C 或 68°C 的条件下，溶液的氧化还原电位范围为 300 至 600 mV Ag/AgCl。结果表明，虽然三价铁离子负责黄铜矿的氧化，但亚铁离子在控制黄钾铁矾的沉淀和成核方面起着重要作用。最终导致该硫化物钝化。黄铜矿通过形成中间产物（蓝铜矿，CuS）而溶解，随后被铁离子氧化，释放出 Cu2+ 离子。 (c) 2008 Elsevier B.V. 保留所有权利。
This paper reports the effect of redox potential (or Fe3+/Fe2+ ratio) on chalcopyrite leaching. The relationship between redox potential and other variables (iron concentration and temperature) is also evaluated. Leaching tests were performed in stirred Erlenmeyer flasks with 0.5 g of pure chalcopyrite and 100 mL of a Fe3+/Fe2+ sulphate solution. The redox potential ranged between 300 and 600 mV Ag/AgCl for the solution at a pH 1.8, 180 rpm, with temperatures at 35 degrees C or 68 degrees C. The results show that although ferric ion is responsible for the oxidation of chalcopyrite, ferrous ion has an important role in that it controls precipitation and nucleation of jarosites. which ultimately causes passivation of this sulphide. Chalcopyrite dissolves through the formation of an intermediary product (covellite, CuS) that is later oxidized by ferric ion, releasing Cu2+, ions. (c) 2008 Elsevier B.V. All rights reserved.