Formative mechanism of preferential solution flow during dump leaching

被引:18
作者
Wu Ai-xiang [1 ]
Yin Sheng-hua
Liu Jin-zhi
Yang Bao-hua
机构
[1] Beijing Univ Sci & Technol, Sch Civil & Environm Engn, Beijing 100083, Peoples R China
[2] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China
来源
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2006年 / 13卷 / 05期
基金
中国国家自然科学基金;
关键词
macropore; segregation; sliming; permeability; preferential solution flow;
D O I
10.1007/s11771-006-0093-6
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Preferential flow is a rapid movement of solution through pores caused by coarse ores. Macropore is the main factor for the preferential flow. Macropore can be defined from three aspects. Segregation of the ores during dumping was studied according to particle kinematics. Small ores become smaller under the effect of acid and weathering. Clay in the rainwater from the hillside precipitates in the dump. Segregation and fine ores are the main causes in macropore. The permeability in coarse ores is better than that in fine ores. The mechanism in the preferential flows was studied combining the fast conducting effect of the macropore. Experimental result shows that, at certain application rate, fine ore area is saturated while large volume of solution flows laterally to the coarse ore area and leaks out quickly through the macropores. Thus the mechanism of preferential solution flows is further illustrated.
引用
收藏
页码:590 / 594
页数:5
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