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ball mill for artisanal mining

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  9. Health Impact of Artisanal Gold Mining in Latin America

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  17. Published in Journal of Cleaner Production 183 2012Authors Kevin Drace 183 Adam M Kiefer 183 Marcello M Veiga 183 Matt K Williams 183 Benjamin AscariAffiliation Mercer University 183 University of British Columbia 183 University of MississippiAbout Sustainability
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    Ball Mills are generally used to grind material 1/4 inch and finer down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency with ball mills they must be operated in a closed system with oversize material continuously being recirculated back into the mill to be reduced.

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  32. Using a small ball mill to investigate gold liberation

    Using a small ball mill to investigate gold liberation . A small ball mill can be build to test the liberation. Artisanal miners in Mozambique (Fig. 2.5) make small manual ball mills using a gas cylinder. This can grind 10 to 20 kg of material in one or two hours depending on the size of the tank.

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