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11期    总第236期    2018年11月

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文章编号:1004-0609(2018)-11-2327-14
堆浸水力学研究前沿:结构表征与模型仿真
缪秀秀1, 3,吴爱祥1,杨保华2

(1. 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;
2. 湖南涉外经济学院,长沙 410205;
3. 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉 430071
)

摘 要: 随着堆浸提铜工艺的推广,堆浸理论研究不断推进。渗流传质作为堆浸水力学过程的主线,是影响矿物浸出速度的关键。当前,矿堆水力学研究的前沿主要集中在矿堆散体结构表征及堆浸渗流传质过程的模拟。首先介绍以CT技术和计算机图像处理技术为核心的矿堆结构表征研究进展,分析这一技术在矿堆结构表征上的局限;其次阐述堆浸水力学过程仿真的发展,分析传统模型存在的问题,着重介绍孔隙尺度堆浸模型的种类和特征,认为孔隙尺度模型是实现堆浸过程精细化、机制透明化的发展趋势。

 

关键字: 堆浸;水力学;结构表征;CT技术;渗流传质模型

Recent advances in heap leaching research: Characterisation and modelling
MIAO Xiu-xiu1, 3, WU Ai-xiang1, YANG Bao-hua2

1. Key Laboratory of High-efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;
2. Information Science and Engineering School, Hunan International Economics University, Changsha 410205, China;
3. State Key Laboratory for Geo-mechanics and Geo-technical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

Abstract:Theories on heap leaching has advanced over time with widely operated leach heaps, especially copper heaps. The flow and transport comprise the main research line running through the study on heap hydraulics, which is a critical influence on mineral dissolving rate. Currently, ore aggregate characterisation and coupled flow and transport modelling have become a frontier of the hydraulics research. The structure characterisation advances were reviewed by means of computed tomography (CT) and computational image processing, and the defects of both technologies that limit further progress on structure characterisation were analysed. Subsequently, the development of heap leaching models was traced. Limitation of conventional models was revealed, and the newly merged pore-scale modelling was introduced with emphasis on its features. It is believed that pore-scale model that takes advantage of CT geometry promises to be a potential direction for the advance of leaching models to visualise leaching process and illuminate the mechanisms.

 

Key words: heap leaching; hydraulics; structure characterisation; computed tomography; flow and transport model

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

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

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