Experimental study on preferential solution flow during dump leaching of low-grade ores
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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 wordslow-grade ore preferential solution flow permeability surface tension applied rate
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- CRUNDWELL F K. How do bacteria interact with minerals[J]. Hydrometallergy, 2003(71): 75–81.Google Scholar
- ZHOU Hong-ming, ZHENG Shi-li, ZHANG Yi. Leaching of a low-grade niobium-tantalum ore by highly concentrated caustic potash solution[J]. Hydrometallurgy, 2005(80): 83–89.Google Scholar
- NI Yu-wen, OU Zi-qing. Research advance of soil preferential flow and pollutant priority migrate[J]. Soil and Environment, 2000, 9(1): 60–63. (in Chinese)Google Scholar
- CHEN Yong-ping, SHI Ming-heng. Determination of permeability for porous media using fractal theory[J]. Journal of Tsinghua University: Science and Technology, 2000, 40(42): 94–97. (in Chinese)Google Scholar
- LIU Xiao-li, LIANG Bing, XUE Qiang. Fractal description of porous media permeability[J]. Advances in Water Science, 2003, 14(6): 769–773. (in Chinese)Google Scholar
- LIU Jun-rong, QIN Ji-shun, WU Xiao-dong. Experimental study on relation between temperature and rocky permeability[J]. Journal of the University of Petroleum: Edition of Natural Science, 2001, 25(4): 51–53. (in Chinese)Google Scholar