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    自然科學版 英文版

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    中南大學學報(英文版)

    Journal of Central South University

    Vol. 9    No. 1    March 2002

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    Influences of silver sulfide on the bioleaching of
    chalcopyrite, pyrite and chalcopyrite-containing ore
    HUYue-hua1(胡岳華),WANG Jun2(王 軍),QIUGuan-zhou1(邱冠周),WANG Dian-zuo1(王淀佐)

    1.Department ofMineral Engineering, Central South University, Changsha410083, China;
    2.Center ofEnvironmental Sciences, Beijing University, Beijing100871, China

    Abstract:The effects of silver sulfide (Ag2S) on the bioleaching of chalcopyrite and pyritewere investigated in this paper. It has been shown that Ag2S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition ofAg2S selectively increased the copper dissolution from the chalcopyrite-containing ores in shake flasks with a recovery of 85.3% compared with 24.3% without Ag2S, while slightly decreased the iron yields from 51% to 41.8%. The copper extraction of the chalcoopyrite-containing waste rock in column leaching charged with 18 kgmass increased up to 21.7% in the presence ofAg2S, while only 3.4% in the absence of the catalyst. The mechanismofAg2S catalysis could be explained well by the“Mixed potential model”.

     

    Key words: silver sulfide; catalysis; chalcopyrite-containing ores; bioleaching

    中南大學學報(自然科學版)
      ISSN 1672-7207
    CN 43-1426/N
    ZDXZAC
    中南大學學報(英文版)
      ISSN 2095-2899
    CN 43-1516/TB
    JCSTFT
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