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羊拉铜矿氧化铜矿柱浸扩大试验研究

ISSN号：0253-6099
期刊名称：矿冶工程
时间：2011.4.4
页码：79-82
分类：TD853.38[矿业工程—金属矿开采;矿业工程—矿山开采] TF803.21[冶金工程—有色金属冶金]
作者机构：[1]School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
相关基金：Funded by the National Natural Science Foundation of China （No 50934002）, New Century Excellent Talents （No. NECT-07-0070）; and Yunnan Provincial Programs for Science and Technology Innovation （No. 2007AD001）.
相关项目：多相多场条件下浸矿体系响应机制及其过程调控

关键词：碱的混合的铜氧化物和硫醚矿物质, BIOLEACHING, 一致设计, 铜恢复, 酸平衡, alkaline mixed copper oxide and sulphide mineral, bioleaching, uniform design, copper recovery, acid equilibrium

中文摘要：

我们进行了二阶段的 acidification-bioleaching 实验为一种混合的碱的铜氧化物和硫醚矿物质探查 bioleaching 的可行性。我们为数据分析和试验性的优化使用了一致设计方法，与起始的 pH 价值，肉密度，细菌的接种和作为有影响的因素选择的铁的铁集中。多项式回归证明四个因素顺序在 14.430% ， 8.555% ， 1.982% 和 3.895% 影响铜恢复。在 bioleaching 系统的酸平衡被碱的脉石内容，化学反应和细菌的活动主要影响。提取的倔强的铜的最大的部分到达 71.08% 。铜恢复的动态分析显示 bioleaching 通过一个 lag 沥滤阶段，主要沥滤阶段和相应于细菌的生长阶段的沥滤的静止阶段。与 80.87% 的预言的价值相比，确定的实验观察 78.21% 铜在 1.5 的 pH 的最佳的条件下面的恢复， 5% 的肉密度， 30% 的细菌接种和 9 g L-1 的起始的铁的铁集中。结果建议 bioleaching 对改进全部的铜恢复技术上可行。

英文摘要：

We conducted two-stage acidification-bioleaching experiments to probe the feasibility of bioleaching for a kind of mixed alkaline copper oxide and sulphide mineral. We used the uniform design method for data analysis and experimental optimization, with initial pH value, pulp density, inoculation of bacteria and ferrous iron concentration selected as the influential factors. Polynomial regression shows that the four factors sequentially influence the copper recovery by 14.430%, 8.555%, 1.982% and 3.895%. Acid equilibrium in the bioleaching system is mainly influenced by alkaline gangue content, chemical reactions and bacterial activity. A maximal portion of refractory copper extracted reaches 71.08%. The dynamic analysis of copper recovery indicates that bioleaching goes through a lag leaching phase, prime leaching phase and leaching stationary phase corresponding to the growth phases of bacteria. Compared with the predicted value of 80.87%, the confirmatory experiment observes a 78.21% copper recovery under the optimal conditions of pH of 1.5, pulp density of 5%, bacteria inoculation of 30% and initial ferrous iron concentration of 9 g L^-1. Results suggest that bioleaching is technically feasible to improving total copper recovery.

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