ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Bioleaching of the copper flue dust emanating from smelters at Sarcheshmeh CopperComplex has been studied. At the present, the dust is sent back to the smelter, which reduces itsefficiency. In this study, a continuous system including a feed tank and two-stage aerated stirredtank bioreactors was established. Mixed mesophile bacteria with different amounts of the dustcontaining 35% of copper mainly in the form of sulfide minerals were used. The effects of pulpdensities, residence times and temperatures on the final copper recovery and redox potential wereexperienced. Despite the copper concentrates bioleaching, the process of dust bio-treating was netacid consuming. Lower pulp densities resulted in a stable redox potential in both reactors. However,increasing the pulp density to 7%, was created an unstable redox potential in the first bioreactorespecially at lower temperatures. Final copper recoveries were calculated for pulp densities of 2%,4% and 7%, were 91.8%, 90.3% and 87.6% with residence times of 2.7, 4 and 6 days respectively.The promising results indicated that bioleaching is a feasible process that can be applied to copperflue dusts
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.143.pdf
Permalink
