自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 4    August 2007

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Experimental study on preferential solution flow during dump leaching of low-grade ores
YIN Sheng-hua(尹升华)1, WU Ai-xiang(吴爱祥)1, SU Yong-ding(苏永定)2, ZHANG Jie(张 杰)2

1. School of Civil and Environment Engineering, University of Science and Technology Beijing,Beijing 100083, China;2. School of Resource and Safety Engineering, Central South University, Changsha 410083, China

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

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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