Chalcopyrite leaching in a dimethyl sulfoxide solution containing copper chloride
Chalcopyrite leaching in a dimethyl sulfoxide solution containing copper chloride
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黄铜矿在含有氯化铜的二甲亚砜溶液中浸出
DOI：
10.1007/s42461-021-00400-3
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Akihiro Yoshimura and Yasunari Matsuno
中科院分区：
文献类型：
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作者：
Kota Takatori;Hidekazu Kato;Akihiro Yoshimura and Yasunari Matsuno
黄铜矿(CuFeS_2)是传统硫酸盐介质浸出体系中最难处理的铜矿。这是首次研究使用含有氯化铜(CuCl2)的二甲基亚砜(CH3SOCH3，DMSO)溶液浸出黄铜矿。对以黄铜矿为主的铜精矿在313~413K常压下进行了浸出试验，考察了铜、铁、S、金、砷的浸出形态。结果表明，在373K的温度下，浸取时间为2小时，铜的浸出率为90%，浸出时间为4小时，铜的浸出率为94%，与其他常规工艺相比具有一定的竞争力。含CuCl2的DMSO溶液可以选择性地从黄铜矿中溶解有价金属铜和金，但在残渣中留下黄铁矿(FeS_2)和As等几乎没有经济价值的矿物。铜离子氧化黄铜矿，与精矿中铜与DMSO溶液中初始铜离子的化学计量比成正比，在低于373K的氧气存在下，这一比例得到增强。
Chalcopyrite (CuFeS2) is the most refractory copper mineral when treated in conventional sulfate media leaching systems. This is the first study to examine the use of a dimethyl sulfoxide (CH3SOCH3, DMSO) solution containing copper chloride (CuCl2) for the leaching of chalcopyrite. Leaching experiments for a copper concentrate composed mainly of chalcopyrite were conducted at ambient pressure at 313–413 K. The leaching fractions of Cu, Fe, S, Au, and As were investigated. It was found that 90% of the Cu was extracted in 2 h, and 94% was extracted in 4 h at 373 K, which is competitive with other conventional processes. A DMSO solution containing CuCl2could selectively dissolve the valuable metals Cu and Au from chalcopyrite, but leave minerals with little economic value such as pyrite (FeS2) and As in the residue. Chalcopyrite is oxidized by cupric ion in proportion to the stoichiometric ratio of Cu in the concentrate to the initial cupric ion in the DMSO solution, which is enhanced by the presence of oxygen below 373 K.