Bacterial leaching of a copper sulphide ore containing activated pyrite

سال انتشار: 1386
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,104

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شناسه ملی سند علمی:

ICHEC05_045

تاریخ نمایه سازی: 7 بهمن 1386

چکیده مقاله:

Bioleaching of a copper sulfide ore containing activated pyrite has been studied using a mixed culture of mesophilic bacteria. Microscopic observations showed that pyrite was coated by a thin film of chalcocite mineral and therefore, this kind of copper ore is not suitable for flotation, as a concentrate containing more iron and less copper will be produced. Hence, a bioleaching process was considered as an alternative to treat this ore. Following shake flask and acid consumption tests, column tests of the crushed ore (75% –12.5 mm) were initiated and the effects of culture medium, agglomeration, and irrigation type on copper recovery were studied. Results showed that all the columns containing bacteria had copper recoveries around 90% compared to the abiotic control column with a recovery of 50%. Bioleaching can easily be applied for copper ores containing pyrite rimmed with a thin layer of chalcocyte.

نویسندگان

Manafi

Sarcheshmeh Copper Complex, Research and Development Centre, Rafsanjan, Iran

Seyed Baghery

Sarcheshmeh Copper Complex, Research and Development Centre, Rafsanjan, Iran

Atashdehghan

Sarcheshmeh Copper Complex, Research and Development Centre, Rafsanjan, Iran

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  • S.A. Seyed Bagheri and H.R. Hassani, "Isolation and Identification of ...
  • Z. Manafi, "Bioleaching of Ag glomerated Low-Grade Sulphide Copper Ore", ...
  • L.A. Brickett, "Comparison of Methods used to Inhibit Bacteria Activity ...
  • نمایش کامل مراجع