Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第3期    总第228期    2018年3月

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文章编号:1004-0609(2018)-03-0604-08
激波对堆浸渗透性与浸出率的影响
艾纯明1,王贻明2,刘 超3

(1. 辽宁工程技术大学 安全科学与工程学院,葫芦岛 125105; 2. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京 100083; 3. 万宝矿产有限公司,北京 100053)

摘 要: 为解决浸出矿堆渗透性差、浸出率低的问题,引入激波管试验,并结合渗流力学原理、CT扫描等手段考察应力波改善堆浸渗透性的效果,采用变水头法对矿柱的渗透性进行了测量。结果表明:激波对堆浸散体介质的孔隙结构起到了松散作用,矿柱孔隙当量直径扩大了32%,孔隙率提高了5.72%,渗透系数增加了3.8~10倍,溶液渗流得到了强化,并体现出一定的时效性;经过激波作用后,矿石浸出率提高了近10%,在反应后期激波提高浸出率的作用更明显。

 

关键字: 激波;堆浸;渗透性;浸出率;孔隙结构

Effect of shock wave on permeability and leaching rate during heap leaching
AI Chun-ming1, WANG Yi-ming2, LIU Chao3

1. College of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, China? 2. Key Laboratory of High Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China; 3. Wanbao Mining Limited, Beijing 100053, China

Abstract:To improve heap permeability and leaching rate of ore, the shock tube experiment was introduced in the heap leaching. The improved effect of the permeability with the shock wave was examined based on both the seepage mechanics principle and the CT scanning. The results show that shock wave has impact on the pore structure of heap leaching medium, and the equivalent diameter of pillar pore is increased by 32%, the porosity is increased by 5.72%. When the permeability of pillar is measured by the means of variable water head, the permeability coefficient increases 3.8-10 times. The solution seepage which reflects certain timeliness has reinforced. The ore leaching rate increases by nearly 10% due to the function of the shock wave. In the late reaction, the effect of the reinforcement is more apparent.

 

Key words: shock wave; heap leaching; permeability; leaching rate; pore structure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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