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Effects of bioleaching on the mechanical and chemical properties of waste rocks

ISSN号：1674-4799
期刊名称：International Journal of Minerals Metallurgy and M
时间：2012.1.1
页码：1-8
分类：TS224.4[轻工技术与工程—粮食、油脂及植物蛋白工程;轻工技术与工程—食品科学与工程] TS64
作者机构：[1]Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing100083, China, [2]School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
相关基金：This work was financially supported by the National Natural Science Foundation of China （Nos.50934002 and 51104011）, the Program for Changjiang Scholars and Innovative Research Team in Universities （IRT0950）, and China Postdoctoral Science Foundation （No.20100480200）.
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

作者： Yin, Sheng-hua|Wu, Ai-xiang|Wang, Shao-yong|Ai, Chun-ming|

关键词：浸出工艺, 机械测试, 化学性能, 废石, 岩石性质, 浸出过程, 金属回收, 故障模式, bioleaching, mechanical properties, chemical properties, waste rocks

中文摘要：

Bioleaching 过程在浪费岩石的机械、化学的性质引起戏剧的变化，并且在金属恢复和垃圾场稳定性起一个重要作用。这研究集中了于受到 bioleaching 的浪费岩石的特征。一系列实验被进行在 bioleaching 过程期间调查岩石性质的进化。沥滤的浪费岩石的机械行为例如失败模式，正常应力，砍力量，和结合通过机械测试被决定。SEM 成像的结果在在垃圾场的不同部分定位的沥滤的岩石的表面形态学显示出可观的差别。沥滤的岩石的矿物学的内容在 bioleaching 期间反映溶解和降水的程度。垃圾场孔和岩石尺寸在溶解，降水，和泥土交通的效果下面变化。沥滤的岩石的粒子尺寸由于岩石正直和干燥降水的变换的损失减少了进好粒子。

英文摘要：

Bioleaching processes cause dramatic changes in the mechanical and chemical properties of waste rocks, and play an important role in metal recovery and dump stability. This study focused on the characteristics of waste rocks subjected to bioleaching. A series of ex- periments were conducted to investigate the evolution of rock properties during the bioleaching process. Mechanical behaviors of the leached waste rocks, such as failure patterns, normal stress, shear strength, and cohesion were determined through mechanical tests. The results of SEM imaging show considerable differences in the surface morphology of leached rocks located at different parts of the dump. The minera- logical content of the leached rocks reflects the extent of dissolution and precipitation during bioleaching. The dump porosity and rock size change under the effect of dissolution, precipitation, and clay transportation. The particle size of the leached rocks decreased due to the loss of rock integrity and the conversion of dry precipitation into fine particles.