This paper presents the effect of mineralization on chalcopyrite chemical leaching in very simple H2SO4 solution systems at pH 1.0, with 5 % chalcopyrite concentrate at 65℃. The copper extractions after 12 days leaching of marine volcanic and porphyry chalcopyrite were 85.7 and 66.6 %, respectively. It was found that sulphur element formed on the surface of two samples as a result of XRD and SEM-EDAX, which was very porous that did not inhibit chemical leaching reaction. Meanwhile, (Cu, Fe)12As4S13 formed on the surface of porphyry type chalcopyrite, which may cause low leaching ratio of porphyry type chalcopyrite as passivation. (Cu, Fe)12As4S13 may be one kind of the polysulphide compounds.
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机译:中国双重上市公司a、h股价差影响因素的实证研究 =An Empirical Study on the Influence Factors of Price Difference between A-share and H-share of China's Dual-listed Companies