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Abstract of the Article

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Optimization of Chalcopyrite Concentrate Bioleaching Using Thermophil

Authors:
[ Ghazi ] -
[ Ranjbar ] -
[ Manafi ] -

Abstract:

About 1430 (ton / day) of copper concentrate with grade of 99.99 is produced in Sarcheshmeh copper complex which is further treated in smelting process. In this project, tank bioleaching was considered as an alternative and environmental friendly process to recover the copper from concentrate. The bacteria (Acidianus brierleyi) used in this paper were originally isolated from Sarcheshmeh Copper Mine, adapted to the chalcopyrite concentrate with a pulp density in the range of 1-15 % (w/v) concentrate and routinely maintained on a 9K nutrient medium. The experiments were carried out in airlift reactor. Multivariable multilevel experiment design technique was used to investigate the effect of temperature and density on the copper recovery. From the results of this study, it can be pointed out that about 85% of copper at 10% (w/v) pulp density and temperature of 75° C was recovered in 120 hours using Acidianus brierleyi while at 15% (w/v) pulp density at temperature of 70° C, about 80% of copper was recovered in 240 hours.

Keywords:

Bioleaching, Chalcopyrite concentrate, Acidianus brierleyi, Airlift, Adaptation.