| 低品位硫化铜矿的细菌浸出 |
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| 引用本文： | 赖绍师,覃文庆,杨聪仁,王军,张雁生,张博,常自勇,匡浩华.低品位硫化铜矿的细菌浸出[J].中国有色金属学报,2011,21(6). |
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| 作者姓名： | 赖绍师 覃文庆 杨聪仁 王军 张雁生 张博 常自勇 匡浩华 |
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| 作者单位： | 中南大学资源加工与生物工程学院,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展计划项目，国家高技术研究发展计划重点项目 |
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| 摘 要： | 以宁夏某低品位硫化铜矿为研究对象,利用嗜酸氧化亚铁硫杆菌(Acidithiobacillusferrooxidans)和嗜酸氧化硫硫杆菌(Acidithiobacillusthiooxidans)的混合菌,采用摇瓶浸出、小型柱浸和大型柱浸对矿石可浸性进行研究；采用X射线衍射仪分析矿物及其浸渣的成分；采用扫描电镜分析浸渣表面形貌及其表面元素的含量.结果表明摇瓶矿浆浓度为5%,浸出55d铜浸出率为94.38%;小型柱浸处理矿石2.10kg,矿石粒度小于15mm,浸出226d铜浸出率为62.50%;大型柱浸处理矿石77.85kg,矿石粒度小于25mm,浸出285d铜浸出率为50.63%.柱浸过程中,铜的浸出速率逐渐下降；浸渣中钙含量基本不变,而元素硫的含量明显增加,且存在新的石膏相；浸出后矿石表面元素硫、钙、铁的含量明显增加,在浸出过程中生成的硫酸钙结晶覆盖在矿石表面,铁在矿石表面形成沉淀,使矿石的渗透性变差,导致铜的浸出率逐渐下降.
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| 关 键 词： | 硫化铜矿 硫酸钙 细菌浸出 铁沉淀 |
Bioleaching of low grade copper sulfide ore |
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| LAI Shao-shi,QIN Wen-qing,YANG Cong-ren,WANG Jun,ZHANG Yan-sheng,ZHANG Bo,CHANG Zi-yong,KUANG Hao-hua.Bioleaching of low grade copper sulfide ore[J].The Chinese Journal of Nonferrous Metals,2011,21(6). |
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| Authors: | LAI Shao-shi QIN Wen-qing YANG Cong-ren WANG Jun ZHANG Yan-sheng ZHANG Bo CHANG Zi-yong KUANG Hao-hua |
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| Affiliation: | LAI Shao-shi,QIN Wen-qing,YANG Cong-ren,WANG Jun,ZHANG Yan-sheng,ZHANG Bo,CHANG Zi-yong,KUANG Hao-hua (School of Resource Processing and Bioengineering,Central South University,Changsha 410083,China) |
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| Abstract: | A mixed culture consisting of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans was used to study technical feasibility of bioleaching of some copper sulfide ore from Ningxia.The bioleaching test was carried out in flask,small-scale column and large-scale column.The residues were analyzed by chemical analysis and X-ray diffractometry.The residues surface and element content were analyzed by scanning electron microscopy and energy spectrum.The results show that 94.38% copper is extracted after... |
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| Keywords: | copper sulfide calcium sulphate bacterial leaching iron precipitation |
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