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Pore structure of ore granular media by computerized tomography image processing

  • Wu Ai-xiang  (吴爱祥)
  • Yang Bao-hua  (杨保华)Email author
  • Xi Yong  (习泳)
  • Jiang Huai-chun  (江怀春)
Article

Abstract

The pore structure images of ore particles located at different heights of leaching column were scanned with X-ray computerized tomography (CT) scanner, the porosity and pore size distribution were calculated and the geometrical shape and connectivity of pores were analyzed based on image process method, and the three dimensional reconstruction of pore structure images was realized. The results show that the porosity of ore particles bed in leaching column is 42.92%, 41.72%, 39.34% at top, middle and bottom zone, respectively. Obviously it has spatial variability and decreases appreciably along the height of the column. The overall average porosity obtained by image processing is 41.33% while the porosity gotten from general measurement method in laboratory is 42.77% showing the results of both methods are consistent well. The pore structure of ore granular media is characterized as a dynamical space network composed of interconnected pore bodies and pore throats. The ratio of throats with equivalent diameter less than 1.91 mm to the total pores is 29.31%, and that of the large pores with equivalent diameter more than 5.73 mm is 2.90%.

Key words

ore granular media pore structure X-ray computerized tomography image processing 

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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Wu Ai-xiang  (吴爱祥)
    • 1
  • Yang Bao-hua  (杨保华)
    • 2
    Email author
  • Xi Yong  (习泳)
    • 2
  • Jiang Huai-chun  (江怀春)
    • 2
  1. 1.Civil and Environment Engineering SchoolUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Resources and Safety EngineeringCentral South UniversityChangshaChina

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