中文摘要：

福建紫金山含砷低品位硫化铜矿年产300tCu和1000tCu生物堆浸工业试验结果表明：铜浸出率随着矿石粒度的减小而提高,矿石粒度为-30mm,浸出周期为270d,铜的浸出率达到80.58%;铜萃取率和电积电流效率随着浸出液pH值的降低和电积液中铁的质量浓度的增加而降低,当浸出液pH值下降到1.19时,铜萃取率下降到了50%;通过增加堆高、定期中和萃余液、增加负载有机相洗涤和活性炭＋沙滤＋气浮塔脱除电积原液中有机物等工艺改进后,降低了萃取剂、煤油和电能的消耗量,提高了铜的浸出速率,浸出周期为200d,铜浸出率为81.31%,铜萃取--电积的耗电量为2679.98kW·h·t^-1,高纯阴极铜生产成本1.05万元·t^-1.

英文摘要：

Industrial heap bioleaching tests of 300 t Cu and 1000 t Cu per year were done for low-grade copper sulfide ore bearing arsenic from Zijinshan Copper Mine in Fujian Province,China.The results of the industrial tests indicate that the copper leaching rate increases with the decrease of ore grain size and the leaching rate of 80.58% is obtained during the leaching cycle of 270 d at the particle size of-30 mm.The copper extraction rate and electrowinning current efficiency reduce with the decrease in pH values of the pregnant leaching solution and the increase in mass concentration of iron ions in the electrowinning solution.The copper extraction rate declines to 50% when the pH value of the pregnant leaching solution fells to 1.19.After the innovation process,such as raise of heap height,periodical neutralisation of raffinate solution,load increase of organic phase scrubbing,and removing organic matter from the electrowinning original solution with activated carbon,sand filtration and air flotation column,the consumptions of extractant,kerosene and electrical energy drop and the copper leaching rate is enhanced.The copper leaching rate of 81.31% and the cost of RMB 10500 per ton high-purity cathode copper were gained during the leaching cycle of 200 d with the power consumption of 2 679.98 kW·h·t^-1.