Cu^2+、Fe^2+和Fe^3+对中等嗜热混合菌浸出黄铜矿的影响  

Effects of Cu^2+,Fe^2+,and Fe^3+on bioleaching of chalcopyrite by moderate thermophilic mixed bacteria

作　　者：田祖源 李浩东 魏茜[1] 焦芬[1,2] 覃文庆[1,2] 杨聪仁[1,2] TIAN Zu-yuan;LI Hao-dong;WEI Qian;JIAO Fen;QIN Wen-qing;YANG Cong-ren(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,Central South University,Changsha 410083,China)

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083 [2]中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083

出　　处：《中国有色金属学报》2021年第1期171-180,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51904339,51974364);战略含钙矿物资源清洁高效利用湖南省重点实验室(2018TP1002)。

摘　　要：在50℃、pH 1.6的条件下,研究了Fe^2+、Fe^3+和Cu^2+对中等嗜热混合菌浸出黄铜矿的影响。结果表明:添加低质量浓度Fe^2+时,在浸出前期能够促进黄铜矿的浸出;而添加较高质量浓度Fe^2+时,铜的浸出率反而降低;当添加不同质量浓度Fe^3+时,由于形成黄钾铁矾而导致总铁质量浓度降低,但铜的浸出率并没有明显变化;添加不同质量浓度Cu^2+对黄铜矿的浸出没有显著的影响。同时,添加Fe^2+和Cu^2+与单独添加Fe^2+对黄铜矿的浸出影响是相似的。因此,在生物浸出过程中,可以通过调节浸矿微生物组成降低微生物的亚铁氧化活性,提高硫氧化能力来控制溶液电位,从而强化黄铜矿的生物浸出。The effects of Fe^2+,Fe^3+,and Cu^2+on bioleaching of chalcopyrite by moderate thermophilic mixed bacteria were studied at 50℃and pH 1.6.The experimental results show that addition of lower concentration of Fe^2+can enhance of the bioleaching of chalcopyrite in the early stage,while addition of higher concentration of Fe^2+will case the reduce the copper extraction percentage.When different concentrations of Fe^3+are added,the total Fe concentration will decrease owing to the formation of jarosite,but the copper extraction does not change significantly.The addition of Cu^2+at different concentrations has no obvious effect on the bioleaching of chalcopyrite.The effect of adding Fe^2+and Cu^2+on chalcopyrite leaching is similar to that of adding Fe^2+alone.Therefore,during the bioleaching process,the solution potential can be controlled by adjusting the composition of the microorganisms-decreasing the ability of ferrous oxidation and increasing the ability of sulfur oxidation-to enhance the bioleaching of chalcopyrite.

关 键 词：黄铜矿 中等嗜热混合菌 铜离子 二价铁离子 三价铁离子 

分 类 号：TD952[矿业工程—选矿] TF18[冶金工程—冶金物理化学]