Influences of silver sulfide on the bioleaching of chalcopyrite, pyrite and chalcopyrite-containing ore

来源期刊：中南大学学报(英文版)2002年第1期

论文作者：胡岳华 王军 邱冠周 王淀佐

文章页码：11 - 15

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

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”.