期刊文献+

堆浸过程中矿岩散体粒间孔隙尺寸的演化规律 被引量:3

Pore size evolution of granular ore media during heap leaching
下载PDF
导出
摘要 根据X射线CT技术无损伤地探测细菌浸出前、后矿岩散体介质孔隙结构特征,利用MATLAB环境编写程序对矿岩散体介质颗粒间横向及纵向孔隙尺寸分布进行统计,研究细菌浸出过程中矿岩散体粒间孔隙尺寸演化规律及其对溶浸液渗流特性的影响。研究结果表明:矿岩散体介质孔隙尺寸分布不均匀,分布范围广,基本呈正态规律分布;浸出后顶部区域中等孔隙和大孔隙数量增加,小孔隙数量减少,底部区域中等孔隙也有所增加,但小孔隙数量减少,横向大孔隙数量减少,纵向大孔隙数量变化不明显;浸出后平均孔隙尺寸比浸出前有所增大,大孔隙含量增加,加强了浸堆的渗流各向异性;微细颗粒的运移和沉积对孔隙尺寸演化影响程度最大。 The pore structure characteristics of granular ore media before and after bacteria heap leaching were detected by X-ray computed tomography. Based on MATLAB software, the cross sectional and longitudinal pore size distributions of granular ore media were calculated to investigate the evolution of granular ore media's pore size distribution during heap leaching and its influences on permeability. The results show that intergranular pores are inhomogeneous. The pore size ranges widely and assumes a normal distribution. After leaching, the amounts of middle and large pores at top zone increase, while the amount of small pores decreases. The amount of middle pores at bottom zone increases, small pores decrease, cross sectional large pores decrease, and the longitudinal large pores have no obvious change. Average pore size increases after leaching, so the ratio of large pores increases and the permeability anisotropy is strengthened. The transport and precipitation of fine particles is the most critical factor for the evolution of pore size distribution.
出处 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2009年第6期1712-1717,共6页 Journal of Central South University:Science and Technology
基金 国家自然科学基金资助项目(50774011) 国家教育部博士点基金资助项目(20070008038)
关键词 细菌堆浸 矿岩散体介质 孔隙尺寸 CT技术 图像分析 bacteria heap leaching granular ore media pore size CT technology image analysis
  • 相关文献

参考文献15

  • 1Guyon E. Disorders in granular matter[J]. Physica A, 2005, 357(1): 150-158.
  • 2Pradhan N, Nathsarma K C, Rao K S, et al. Heap bioleaching of chalcopyrite: A review[J]. Minerals Engineering, 2008, 21(5): 355-365.
  • 3Leahy M J, Davidson M R, Schwarz M P. A model for heap bioleaching of chaIcocite with heat balance: Bacterial temperature dependence[J]. Minerals Engineering, 2005, 18(13): 1239-1252.
  • 4Mousavi S M, Jafari A, Yaghmaei S, et al. Computer simulation of fluid motion in a porous bed using a volume of fluid method: Application in heap leaching[J]. Minerals Engineering, 2006, 19(10): 1077-1083.
  • 5Bartlett R W. Solution mining: Leaching and fluid recovery of materials[M]. New York: Gordon and Breach Science Press, 1998: 33-34.
  • 6Al-Raoush R I, Willson C S. Extraction of physically realistic pore network properties from three-dimensional synchrotron X-ray microtomography images of unconsolidated porous media systems[J]. Journal of Hydrology, 2005, 300(1/4): 44-64.
  • 7Hirono T, Takahashi M, Nakashima S. In situ visualization of fluid flow image within deformed rock by X-ray CT[J]. Engineering Geology, 2003, 70(1/2): 37-46.
  • 8Ketcham R A, Carlson W D. Acquisition, optimization and interpretation of X-ray computed tomographic imagery: Applications to the geosciences[J]. Computers & Geosciences, 2001, 27(4): 381-400.
  • 9Monga O, Ngom F N, Delerue J F. Representing geometric structures in 3D tnmography soil images: Application to pore-space modeling[J]. Computers & Geosciences, 2007, 33(9): 1140-1161.
  • 10Appoloni C R, Femandes C P, Rodrigues C R O. X-ray microtomography study of a sandstone reservoir rock[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007, 580(1): 629-632.

二级参考文献24

  • 1张爱东,李炬,陈发,孙灵霞.工业CT图像的三维重建[J].核电子学与探测技术,2005,25(4):420-422. 被引量:11
  • 2宋卫卫,李冠华,欧宗瑛.医学体数据三维可视化技术[J].计算机工程与应用,2006,42(18):22-26. 被引量:8
  • 3张爱东,李炬,孙灵霞.MATLAB编程实现连续断层工业CT图像的三维重建[J].核电子学与探测技术,2006,26(4):489-491. 被引量:9
  • 4吴爱祥,张杰,江怀春.低渗透性矿堆浸孔隙率改善研究[J].矿冶工程,2006,26(6):5-8. 被引量:8
  • 5冈萨雷斯.数字图像处理(MATLAB版)[M].北京:电子工业出版社,2006.
  • 6Abreu R A C, Tavares W F, Castier M. Influence of particle shape on the packing and on the segregation of spherocylinders via Monte Carlo simulations [ J ]. Powder Technology, 2003, 134 ( 7 ) : 167 - 180.
  • 7Tashman L, Masad E, Crowe C, et al. Simulation of fluid flow in granular microstructure using a non-staggered grid scheme [ J ]. Computers & Fluids, 2003,32(2) :1299 -1323.
  • 8Cariaga E, Concha F, Sep'ulveda M. Flow through porous media with applications to heap leaching of copper ores[ J]. Chemical Engineering Journal, 2005,111 (2) :151 - 165.
  • 9Sheikhzadeh G A, Mehrabian M A, Mansouri S H, et al. Computational modelling of unsaturated flow of liquid in heap leaching using the results of column tests to calibrate the model [ J ]. International Journal of Heat and Mass Transfer, 2005, 48 (8) : 279 - 292.
  • 10Okabe H, Blunt J M. Pore space reconstruction using multiple-point statistics [ J ]. Journal of Petroleum Science and Engineering, 2005, 46 (2) :121 -137.

共引文献9

同被引文献73

引证文献3

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部