سال انتشار: ۱۳۸۶

محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی

تعداد صفحات: ۸

نویسنده(ها):

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

چکیده:

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% –۱۲٫۵ 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.