Formative mechanism of preferential solution flow during dump leaching

来源期刊：中南大学学报(英文版)2006年第5期

论文作者：吴爱祥 尹升华 刘金枝 杨保华

文章页码：590 - 594

Key words：macropore; segregation; sliming; permeability; preferential solution flow

Abstract: 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.

基金信息：National Key Fundamental Research and Development Program of China
the National Science Fund for Distinguished Young Scholars
the National Natural Science Foundation of China