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Study on gold leaching performance of biologicals

Xiong Ying et al. (Researching Center of Biological Engineering of Mining Industry,Ministry of Geology and Mineral Product)  
This paper made a brief description on the principles of leaching gold by biologicals.The gold leaching biologicals were prepared from protein rich surplus stock of food industry after changing property through hydrolysis.Factors influencing the performance of gold leaching as density of ore pulp and oxidant and leaching temperature and time were studied.It showed that in the given conditions,the gold leaching rate of oxidized type gold ore by biologicals was more than 95% while the gold leaching rate of refractory gold concentrate after bacterial pre oxidation was the same as that by cyanide leaching.
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