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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
ZHANG Guang-ji, FANG Zhao-heng. The contribution of direct and indirect actions in bioleaching of pentlandite[J]. Hydrometallergy, 2005(80): 59–66.
CRUNDWELL F K. How do bacteria interact with minerals[J]. Hydrometallergy, 2003(71): 75–81.
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.
ACAR S, BRIERLEY J A, WAN Rong-yu. Conditions for bioleaching a covellite-bearing ore[J]. Hydrometallurgy, 2005(77): 239–246.
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)
WU Ai-xiang, YIN Sheng-hua, LIU Jin-zhi, et al. Formative mechanism of preferential solution flow during dump leaching[J]. Journal of Central South University of Technology, 2006, 13(5): 590–594.
WU Ai-xiang, WANG Hong-jiang JIANG Huai-chun. Rule of oxygen transmission in dump leaching[J]. Journal of Central South University of Technology, 2006, 13(3): 295–299.
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)
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)
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)
ZOU Z Y, YOUNG M H, LI Z, et al. Estimation of depth averaged unsaturated soil hydraulic properties from infiltration experiments[J]. Journal of Hydrology, 2001 (242): 26–42.
SIMUNEK J, van GENUCHTEN M T. Estimating unsaturated soil hydraulic properties from tension disc infiltrometer data by numerical inversion[J]. Water Resour Res, 1996(32): 2683–2696.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(50325415)supported by the National Science Fund for Distinguished Young Scholars; Project (50621603) supported by China Science Fund for Distinguished Group; Project (2004CB619200) supported by National Key Fundamental Research and Development Program of China; Project (50574099) supported by National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Yin, Sh., Wu, Ax., Su, Yd. et al. Experimental study on preferential solution flow during dump leaching of low-grade ores. J Cent. South Univ. Technol. 14, 584–588 (2007). https://doi.org/10.1007/s11771-007-0112-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-007-0112-2