Journal of Central South University

, Volume 18, Issue 5, pp 1434–1440 | Cite as

Mathematical model for coupled reactive flow and solute transport during heap bioleaching of copper sulfide

  • Sheng-hua Yin (尹升华)Email author
  • Ai-xiang Wu (吴爱祥)
  • Xi-wen Li (李希雯)
  • Yi-ming Wang (王贻明)


Based on the momentum and mass conservation equations, a comprehensive model of heap bioleaching process is developed to investigate the interaction between chemical reactions, solution flow, gas flow, and solute transport within the leaching system. The governing equations are solved numerically using the COMSOL Multiphysics software for the coupled reactive flow and solute transport at micro-scale, meso-scale and macro-scale levels. At or near the surface of ore particle, the acid concentration is relatively higher than that in the central area, while the concentration gradient decreases after 72 d of leaching. The flow simulation between ore particles by combining X-ray CT technology shows that the highest velocity in narrow pore reaches 0.375 m/s. The air velocity within the dump shows that the velocity near the top and side surface is relatively high, which leads to the high oxygen concentration in that area. The coupled heat transfer and liquid flow process shows that the solution can act as an effective remover from the heap, dropping the highest temperature from 60 to 38 °C. The reagent transfer coupled with solution flow is also analyzed. The results obtained allow us to obtain a better understanding of the fundamental physical phenomenon of the bioleaching process.

Key words

copper sulphide heap bioleaching leaching reaction solution flow solute transport 


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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Sheng-hua Yin (尹升华)
    • 1
    • 2
    Email author
  • Ai-xiang Wu (吴爱祥)
    • 1
    • 2
  • Xi-wen Li (李希雯)
    • 1
  • Yi-ming Wang (王贻明)
    • 1
  1. 1.Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal MinesUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Civil and Environment EngineeringUniversity of Science and Technology BeijingBeijingChina

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