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Experimental study on preferential solution flow during dump leaching of low-grade ores

  • Yin Sheng-hua  (尹升华)Email author
  • Wu Ai-xiang  (吴爱祥)
  • Su Yong-ding  (苏永定)
  • Zhang Jie  (张 杰)
Article

Abstract

The phenomenon of preferential solution flow during dump leaching of low-grade ores was studied. The formative mechanism of preferential solution flow was investigated through analyzing the relationship between permeability and ore diameter, and the relationship between surface tension and ore diameter. The preferential solution flow happened within the fine ore area when the dump was unsaturated. And it could happen within the coarse ore area when the dump became saturated. The results of experiment show that the outflow of coarse ore area increases sharply with higher applied rate. The outflow of fine ore area is greater than that of coarse ore area when the applied rate is below 3.2 L/min, and the preferential solution flow happens in fine ore area. But the preferential solution flow happens in coarse ore area when the applied rate is higher than 3.2 L/min. The result of the experiment is consistent with the mechanism analyzing.

Key words

low-grade ore preferential solution flow permeability surface tension applied rate 

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Copyright information

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

Authors and Affiliations

  • Yin Sheng-hua  (尹升华)
    • 1
    Email author
  • Wu Ai-xiang  (吴爱祥)
    • 1
  • Su Yong-ding  (苏永定)
    • 2
  • Zhang Jie  (张 杰)
    • 2
  1. 1.School of Civil and Environment EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Resource and Safety EngineeringCentral South UniversityChangshaChina

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