工程科学学报.第43卷，第4期：495-502.2021年4月 Chinese Journal of Engineering,Vol.43,No.4:495-502,April 2021 https://doi.org/10.13374/j.issn2095-9389.2020.02.27.002;http://cje.ustb.edu.cn 硫化铜矿粒孔隙模型重构与溶液渗流模拟 尹升华2)，宋庆2)四，陈威2，陈勋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，北京1000832)北京科技大学土木与资源工程学院，北京100083 ☒通信作者，E-mail:SQ1213ueen@163.com 摘要以次生硫化铜矿粉为原料，添加黏结剂、氯化钠制备矿粒，并借助CT扫描技术、图像处理及三维重构方法，开展了 单个矿粒浸出试验，探究了溶浸前后矿粒内部的孔隙变化；运用COMSOL Multiphysics模拟仿真软件，构建了溶液在孔隙通 道中流动的仿真模型.结果表明：经过一周时间的溶浸，矿粒内部孔隙的数目、平均体积、平均表面积及孔隙平均等效直径分 别增长了99%、151%、223%和90%.孔隙率增长了4倍，孔隙连通度增长了近2倍.在孔隙通道较狭窄的区域和底部区域， 溶液的流速、压力急剧增加，对矿粒结构的稳定性产生较大影响. 关键词硫化铜矿旷：制粒技术；CT扫描技术；孔隙演变；数值模拟 分类号TD862 Pore model reconstruction of copper sulfide ore agglomerate and simulation of solution seepage YIN Sheng-hua2),SONG Qing2,CHEN Wei2),CHEN Xun2) 1)Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal,University of Science and Technology Beijing,Beijing 100083,China 2)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:SQ1213ueen@163.com ABSTRACT Bioleaching technology,a method used in mining,utilizes organisms or microorganisms to dissolve and leach useful components from ore.This technology is applied widely in many countries in mining and production of various metals.Although considerable economic benefits have been obtained with the help of bioleaching technology,this technology faces many challenges.For example,as the leaching process progresses,the permeability of the ore heap is worsened from the presence of fine particles and muddy ore.As such,improving heap permeability is a key focus in the field of leaching mining technology.Agglomeration technology,an effective method for improving the permeability of ore heaps,involves crushing the ore and agglomerating it with binders before leaching,which alters the structure of the ore,especially ore powder.The resulting granular structure provides space for the flow of the solution and greatly improves the permeability of the leaching system.The pore structure is constantly changing as the leaching process progresses,which affects the seepage of the solution and even the effect of leaching the ore.In this study,leaching tests were conducted using single-ore granulation of secondary copper sulfide ore powder,binders,and NaCl.Changes in the pore structure during leaching were investigated using X-ray computerized tomography,digital image processing,and three-dimensional reconstruction methods.In addition,COMSOL Multiphysics simulation software was used to construct a simulation model of the flow of the solution in the pore channels.The results reveal that the number,average volume,average surface area,and average equivalent diameter of pores inside the 收稿日期：2020-02-27 基金项目：国家优秀青年科学基金资助项目(51722401)：国家自然科学基金重点资助项目(51734001)：中央高校基本科研业务费专项资金 资助项目(FRF-TP.18-003C1)硫化铜矿粒孔隙模型重构与溶液渗流模拟 尹升华1,2)，宋    庆1,2) 苣，陈    威1,2)，陈    勋1,2) 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) 北京科技大学土木与资源工程学院，北京 100083 苣通信作者，E-mail：SQ1213ueen@163.com 摘    要    以次生硫化铜矿粉为原料，添加黏结剂、氯化钠制备矿粒，并借助 CT 扫描技术、图像处理及三维重构方法，开展了 单个矿粒浸出试验，探究了溶浸前后矿粒内部的孔隙变化；运用 COMSOL Multiphysics 模拟仿真软件，构建了溶液在孔隙通 道中流动的仿真模型. 结果表明：经过一周时间的溶浸，矿粒内部孔隙的数目、平均体积、平均表面积及孔隙平均等效直径分 别增长了 99%、151%、223% 和 90%，孔隙率增长了 4 倍，孔隙连通度增长了近 2 倍. 在孔隙通道较狭窄的区域和底部区域， 溶液的流速、压力急剧增加，对矿粒结构的稳定性产生较大影响. 关键词    硫化铜矿；制粒技术；CT 扫描技术；孔隙演变；数值模拟 分类号    TD862 Pore model reconstruction of copper sulfide ore agglomerate and simulation of solution seepage YIN Sheng-hua1,2) ，SONG Qing1,2) 苣 ，CHEN Wei1,2) ，CHEN Xun1,2) 1) Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal, University of Science and Technology Beijing, Beijing 100083, China 2) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣 Corresponding author, E-mail: SQ1213ueen@163.com ABSTRACT    Bioleaching  technology,  a  method  used  in  mining,  utilizes  organisms  or  microorganisms  to  dissolve  and  leach  useful components  from  ore.  This  technology  is  applied  widely  in  many  countries  in  mining  and  production  of  various  metals.  Although considerable economic benefits have been obtained with the help of bioleaching technology, this technology faces many challenges. For example, as the leaching process progresses, the permeability of the ore heap is worsened from the presence of fine particles and muddy ore.  As  such,  improving  heap  permeability  is  a  key  focus  in  the  field  of  leaching  mining  technology.  Agglomeration  technology,  an effective  method  for  improving  the  permeability  of  ore  heaps,  involves  crushing  the  ore  and  agglomerating  it  with  binders  before leaching, which alters the structure of the ore, especially ore powder. The resulting granular structure provides space for the flow of the solution and greatly improves the permeability of the leaching system. The pore structure is constantly changing as the leaching process progresses, which affects the seepage of the solution and even the effect of leaching the ore. In this study, leaching tests were conducted using single-ore granulation of secondary copper sulfide ore powder, binders, and NaCl. Changes in the pore structure during leaching were  investigated  using  X-ray  computerized  tomography,  digital  image  processing,  and  three-dimensional  reconstruction  methods.  In addition, COMSOL Multiphysics simulation software was used to construct a simulation model of the flow of the solution in the pore channels. The results reveal that the number, average volume, average surface area, and average equivalent diameter of pores inside the 收稿日期: 2020−02−27 基金项目: 国家优秀青年科学基金资助项目（51722401）；国家自然科学基金重点资助项目（51734001）；中央高校基本科研业务费专项资金 资助项目（FRF-TP-18-003C1） 工程科学学报，第 43 卷，第 4 期：495−502，2021 年 4 月 Chinese Journal of Engineering, Vol. 43, No. 4: 495−502, April 2021 https://doi.org/10.13374/j.issn2095-9389.2020.02.27.002; http://cje.ustb.edu.cn