Dissolution behavior of a complex Cu–Ni–Co–Fe matte in CuCl2–NaCl–HCl leaching medium
Dissolution behavior of a complex Cu–Ni–Co–Fe matte in CuCl2–NaCl–HCl leaching medium
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DOI：
10.1016/j.seppur.2007.02.013
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发表时间：
2007-09
影响因子：
8.6
通讯作者：
K. Park;D. Mohapatra;Kim Hong-In;Guo Xueyi
中科院分区：
文献类型：
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作者：
K. Park;D. Mohapatra;Kim Hong-In;Guo Xueyi
本文报道了在酸性强盐水溶液中用氯化铜浸出复杂铜镍钴铁冰铜的研究。研究了氯化铜、氯化钠、盐酸、时间和温度对反应的影响。硫酸盐和四氯化碳在浸提介质中的作用已经在金属提取效率方面进行了评估。在此基础上，可以确定一种合适的工艺参数组合，用于浸出大部分相关的铜、镍和钴价值，并产生低铁溶液。铜和镍的提取被发现是快速的，并在2小时内达到平衡，相比之下，钴，需要延长浸出达到平衡。而在一个初始的快速反应速率后，浸出液中的铁浓度随时间缓慢下降。在最佳条件下（Cu（II）70 gL-1，温度20 ℃），120°C，NaCl 300 gL-1，HCl 0.5M，6小时），95.2%的Cu，98.4%的Ni，83.6%的Co和16.8%的Fe被提取到浸出溶液中。浸出过程中发现，提高温度，高氯化物和Cu（II）的浓度。浸出介质中SO_4含量不超过10 g时，金属浸出率不受影响。四氯化碳的存在并没有提高金属萃取效率。
The paper reports leaching studies on a complex Cu–Ni–Co–Fe matte with cupric chloride in an acidic and strong brine solution. The influences of cupric chloride, NaCl, HCl, time and temperature have been studied. The role of sulphate and carbon tetrachloride in the leaching medium has been evaluated with respect to metal extraction efficiency. On the basis, it has been possible to define a suitable combination of process parameters for leaching out most of the associated copper, nickel and cobalt values and to generate a solution low in iron. Copper and nickel extractions were found to be fast and reached equilibrium within 2h, compared to cobalt, which need prolonged leaching to reach equilibrium. Whereas, after an initial fast reaction rate, iron concentration in leach solution slowly decreased with time. Under optimum conditions (Cu(II) 70gL−1, temp. 120°C, NaCl 300gL−1, HCl 0.5M, 6h), 95.2% Cu, 98.4% Ni, 83.6% Co and 16.8% Fe were extracted to the leach solution. The leaching process was found to be enhanced by elevated temperature, high chloride and Cu(II) concentrations. The metal extractions were unaffected up to 10g SO4in the leaching medium. The presence of CCl4did not improve the metal extraction efficiency.