The effect of potential heap construction methods on column bioleaching of copper flotation tailings containing high levels of fines by mixed cultures
The effect of potential heap construction methods on column bioleaching of copper flotation tailings containing high levels of fines by mixed cultures
复制标题
潜在堆建方法对混合培养含高细粉铜浮选尾矿柱生物浸出的影响
DOI：
10.1016/j.mineng.2016.07.015
复制
发表时间：
2016-11-01
影响因子：
4.8
通讯作者：
Liu, Xueduan
中科院分区：
文献类型：
--
作者：
Hao, Xiaodong;Liang, Yili;Liu, Xueduan
众所周知，在堆浸过程中，过多的细粉会降低堆的渗透性，阻碍渗滤液流动的通道，进而导致金属回收率低。比较了铜浮选尾矿分层堆法(A法)、团聚式堆法(B法)和球团烧结法(C法)3种可能的堆法对柱生物浸出行为的影响。在3种造堆方法中，尾矿铜浸出率在A、B和CON第83天分别达到54.61%、60.09%和43.93%。方法B的铜萃取率最高。此外，利用基于16S rRNA扩增的Illumina MiSeq测序技术对微生物群落的组成和结构进行了分析。酸性硫杆菌、钩端螺旋体和铁质体菌群是三种堆体构建方法中的主要微生物。去势对应分析表明，方法C对微生物群落影响不大。这些研究揭示了不同的堆筑方法对浸出行为和微生物动力学的影响，这将有助于细粒矿石的生物浸出。(C)爱思唯尔有限公司出版的2016年。
It is known that excess fines may reduce heap permeability and block channelings of leachate flow in heap bioleaching operation, and further cause low metal recovery. The purpose of this investigation was to compare the effects of three potential heap construction methods including layered heap construction method (Method A), agglomerate heap construction method (Method B) and pelletized sintering heap construction method (Method C) of copper flotation tailings on column bioleaching behaviors. In the three heap construction methods, the tailings copper extractions achieved 54.61%, 60.09% and 43.93%, respectively, in Method A, B and Con day 83. Copper extraction of Method B reached maximum. In addition, compositions and structures of microbial communities were examined using Illumina Miseq sequencing technology based on 16S rRNA amplification. Acidithiobacillus, Leptospirillum and Ferroplasma were main microorganisms in three heap construction methods. Detrended correspondence analysis showed that Method C had little effect on microbial communities. These studies revealed the influence of different heap construction methods on leaching behaviors and microbial dynamics, which will facilitate the bioleaching of fine-grained ores. (C) 2016 Published by Elsevier Ltd.