Recovery of Bismuth and Antimony from Silver-separation Slag of Copper Anode Slime
Received:May 05, 2014   Revised:May 07, 2014   Accepted:May 08, 2014      Published Online:August 21, 2014
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DOI:10.3969/j.issn.1007-7545.2014.09.005
KeyWord:copper anode slime; silver-separation slag; bismuth; antimony; comprehensive recovery
                 
AuthorInstitution
Wang Chao 青海铜业有限责任公司
Jiang Xunxiong 北京矿冶研究总院
Jiang Wei 北京矿冶研究总院
Wang Shengdong 北京矿冶研究总院
Fen Linyong 北京矿冶研究总院
Dong Hongjun 西部矿业集团有限公司
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Abstract:
      The silver-separation slag from smelting process of copper anode slime in Kardo furnace was leached by mixed solution of sulfuric acid and sodium chloride. The results show that bismuth and antimony enter into leacheate after being leached, and lead remains in residue after being transformed into lead sulfate. The leaching rates of Bi, Sb, Pb, Ag are 99.5%, 91.2%, 0.7%, 0.8% respectively, and gold is hardly leached under the optimum conditions including H2SO4 concentration of 2.5 mol/L, NaCl concentration of 125 g/L, ratio of liquid to solid of 4∶1, temperature of 95 ℃, and leaching duration of 4 h.
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