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method of recovery of very pure electrolytic copper by electrolysis, simplistic.
method of recovery of very pure electrolytic copper by electrolysis, simplistic.
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机译:通过电解回收非常纯的电解铜的方法,方法很简单。
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Copper sulfate solution obtained by the sulfuric acid leaching of cupriferous material and containing impurities such as Fe, As, Sb, Bi, Se, Te, Sn, Pb, Cl, Ag, Hg, and PO4, are subjected to a two step purification process. In the first step, the pH is adjusted to 2.7-3.3 with, e.g. Ca(OH)2, and the potential in relation to the standard hydrogen electrode is adjusted to at least 575 mv with an oxidizing agent, e.g. air. The temperature is 50 DEG -90 DEG C. Impurities precipitate and are separated. Se, Cl, and possibly Ag and Hg remain in solution and are removed in the second step, wherein the potential is reduced to below 350 mv by addition of a cupriferous reducing agent, e.g. Cu or Cu2O. The pH is below 3 and the temperature is below 50 DEG C. Impurities precipitate as copper (I) compounds, and are separated to provide the solution in condition for the electrolysis. The copper produced is of high purity, having a conductivity of at least 58.8 mho x m/mm2 and a maximum semi-hard temperature of 200 DEG C.
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机译:通过硫酸浸出铜质材料得到的硫酸铜溶液,其中包含诸如Fe,As,Sb,Bi,Se,Te,Sn,Pb,Cl,Ag,Hg和PO4等杂质,经过两步纯化工艺。在第一步中,用例如pH调节pH至2.7-3.3。 Ca(OH)2,以及相对于标准氢电极的电势,用氧化剂(例如,NaCl)调节至至少575 mv。空气。温度为50℃-90℃。杂质沉淀并分离。硒,氯以及可能的银和汞保留在溶液中,并在第二步中除去,其中,通过添加铜的还原剂,例如硫酸镁,将电势降低至350 mv以下。 Cu或Cu 2O。 pH低于3且温度低于50℃。杂质以铜(I)化合物的形式沉淀,并被分离以提供在电解条件下的溶液。所生产的铜具有高纯度,导电率至少为58.8 mho x m / mm2,最大半硬温度为200℃。
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