Research on chemical leaching mechanism of chalcopyrite with difference mineralization
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 type and porphyry type chalcopyrite were 85. 7％ and 66. 6％ , respectively. It was found that sulfur element formed on the surface of two samples as the result of XRD and SEM-EDAX, which was very porous that didnt inhibit chemical leaching reaction. In the meanwhile, (Cu, Fe)12As4S13 formed on the surface of porphyry type chalcopyrite, which caused low leaching ration of porphyry type chalcopyrite as passivation. (Cu, Fe)2As4S13 may be one kind of the polysulphide compounds.
chalcopyrite chemical leaching passivation
Jing Bai Jiankang Wen Songtao Huang Biao Wu Guocheng Yao
National Engineering Lab. of Biohydrometallury in General Research Institute for Nonferrous Metals, 100088, Beijing, China
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
126-128
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）