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《Metal Mine》 2006-02
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Study on Bioleaching Conditions of Low-grade Primary Copper Sulfide Ore from Yongping Copper Mine

Zhang Weimin~(1,2) Gu Shifei~2 Yu Rong~2(1.China University of Geosciences,Wuhan;2.Donghua Institute of Technology)  
To recover and utilize the low-grade primary copper sulfide ore resource in the waste ore in Yongping Copper Mine,the effect of inoculation concentration,initial Fe~(2+) concentration,ore particle size and pulp density on its bioleaching was studied.The results show that the conditions beneficial to the copper leaching include inoculation concentration of 20%,initial Fe~(2+) concentration of 0 g/L,initial pH value of 1.2,controlling the pH value in the leaching process to be under 1.50,ore particle size of 5 mm and pulp density of 20%~25%.Too high a ferric concentration and the iron precipitation in the solution will directly affect the bioleaching effect.Though the leaching bacteria can well adapt to the ore leaching environment,measures for strengthening the leaching should be taken due to the slow leaching speed and rate of copper.
【CateGory Index】: TD952
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