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首页> 外文期刊>International Journal of Electrochemical Science >Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes
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Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes

机译:使用不溶性和可溶性阳极处理废铜电解液

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摘要

The use of copper anodes with non standard content of impurities for the treatment of waste, sulphuracid solutions that came as a result of the industrial process of electrolytic copper refining wasinvestigated. Those solutions contain the high content of copper, nickel and arsine, and because of that,the copper anodes with high content of Ni, Pb, Sn and Sb were prepared. Examination the effect ofhigh impurities content as well as the influence of the solution temperature on the anodes behaviourduring the electrolytic process under the conditions that are the same as the industrial was the aim ofthis work. Obtained results clearly indicate that tested anodes could be used for the refined during theelectrorefining process. Dissolution of copper anodes was not stoppage after the first appearance of thepassivation region for A1 and A2 anodes while appearance of passivation for A3 anode, for testduration of 72 h, was not registered. The start time of the first passivation appearance is shorter in thecase of the anode with high content of all impurities, anode A1. The first passivation occurrence wasdetected on higher temperature after about 29 h from the test starts. The change of chemicalcomposition of electrolyte was monitored during electrolysis. Concentration of nickel in the workingelectrolyte at the end of process is increased and it corresponds to the Ni content in anodes. The copperand arsenic concentrations are decreased during the process. Arsenic passes into the anode slime, whilethe copper is deposited on the cathode and also passed in the slime. After the process is finished,obtained solution could be used for the nickel recover using the electrochemically or chemicallymethods.
机译:研究了使用具有非标准杂质含量的铜阳极来处理废料,硫酸铜工业电解铜工艺产生的硫酸溶液。这些溶液含有高含量的铜,镍和砷,因此,制备了具有高含量的Ni,Pb,Sn和Sb的铜阳极。在与工业相同的条件下,检验电解过程中高杂质含量的影响以及溶液温度对阳极行为的影响是本工作的目的。所获得的结果清楚地表明,在电精制过程中可以使用测试的阳极进行精制。在首次出现钝化区域的A1和A2阳极之后,没有停止铜阳极的溶解,而没有记录到测试时间为72小时的A3阳极的钝化出现。在所有杂质含量高的阳极(阳极A1)的情况下,第一次钝化出现的开始时间较短。从测试开始约29小时后,在较高的温度下检测到第一次钝化。在电解期间监测电解质的化学组成的变化。在过程结束时,工作电解质中镍的浓度增加,它对应于阳极中的镍含量。在此过程中,铜和砷的浓度会降低。砷进入阳极泥中,而铜沉积在阴极上,同时也进入泥中。该过程完成后,所得溶液可用于通过电化学或化学方法回收镍。

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