کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686705 889110 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chalcopyrite concentrate leaching with biologically produced ferric sulphate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Chalcopyrite concentrate leaching with biologically produced ferric sulphate
چکیده انگلیسی

Biological ferric iron production was combined with ferric sulphate leaching of chalcopyrite concentrate and the effects of pH, Fe3+, temperature and solids concentration on the leaching were studied. The copper leaching rates were similar at pH of 1.0–1.8 and in the presence of 7–90 g L−1 Fe3+ despite massive iron precipitation with 90 g L−1 Fe3+. Increase of the leaching temperature from 50 °C to 86 °C and solids concentration from 1% to 10% increased the copper leaching rate. Increase in solids concentration from 1% to 10% decreased the copper yields from 80% to 40%. Stepwise addition of ferric iron did not improve the copper yields. CuFeS2, Ag and Cu1.96S potentials indicated the formation of a passivating layer, which consisted of jarosite and sulphur precipitates and which was responsible for the decreased leaching rates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 97, Issue 14, September 2006, Pages 1727–1734
نویسندگان
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