EFFECTS OF GALVANIC INTERACTIONS OF SULFIDES ON EXTRACTION OF PRECIOUS METALS FROM REFRACTORY COMPLEX SULFIDES BY BIOLEACHING

被引:21
作者
ATTIA, YA
ELZEKY, M
机构
[1] The Ohio State University, Department of Materials Science and Engineering, Mining Engineering Division, Columbus, OH 43210
关键词
D O I
10.1016/0301-7516(90)90068-A
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A process employing bioleaching was conceptually developed and tested for the recovery of precious metals from complex sulfide ores and tailings. Since the precious metals were associated with the sulfide minerals, a bulk sulfide flotation concentrate was produced and then subjected to bioleaching using Thiobacillus ferrooxidans, before final treatment of residues by cyanidation to extract the gold and silver. In agreement with the galvanic series of sulfides, our experimental results demonstrate that in a mixed sulfide concentrate containing pyrite (FeS2), galena (PbS), sphalerite (ZnS), and chalcopyrite (Cu FeS2), the biooxidation-leaching of chalcopyrite, sphalerite and galena proceeded preferentially, while that of pyrite was retarded compared with bioleaching of a chiefly pyrite concentrate. This was reflected in the recovery of precious metals also. A recovery of over 95% of gold and 98% of silver from the complex sulfide ore concentrate could be achieved after bioleaching ahead of cyanidation extraction.
引用
收藏
页码:99 / 111
页数:13
相关论文
共 34 条
  • [1] [Anonymous], 1966, ATLAS ELECTROCHEMICA
  • [2] ATTIA YA, 1985, MICROBIOLOGICAL EFFE, P111
  • [3] ATTIA YA, 1989, J HYDROMETALL, V22, P291
  • [4] ROLE OF BACTERIA IN COPPER MINING OPERATIONS
    BECK, JV
    [J]. BIOTECHNOLOGY AND BIOENGINEERING, 1967, 9 (04) : 487 - &
  • [5] BERRY VK, 1978, HYDROMETALLURGY, V3, P309, DOI 10.1016/0304-386X(78)90036-1
  • [6] BLEGLER T, 1979, ELECTROCHIM ACTA, V24, P415
  • [7] BRUYNESTEYN A, 1985, MICROBIOLOGICAL EFFE, P121
  • [8] MICROORGANISMS IN LEACHING SULFIDE MINERALS
    BRYNER, LC
    ANDERSON, R
    [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY, 1957, 49 (10): : 1721 - 1724
  • [9] CHIZHIKOV DM, 1959, T CHEOTVERTOGO SOVES, P715
  • [10] DUTRIZAC JE, 1973, CAN METALL QUART, V12, P409