Study of Slurry Concentration and Flocculant Unit Consumption on the Permeability and Damage of Paste Stockpiles
YIN Shenghua1,2,*, CAO Yong1,2, WU Aixiang1,2, HOU Yongqiang1,2, YANG Shixing1,2
1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
Abstract: Paste stockpile variable head permeation test was carried out to study the influence law of slurry concentration and flocculant unit consumption on the permeability coefficient of paste and the mode of permeation destruction. In this paper, the permeability coefficient of 28 sets of specimens was measured by TST-55 type permeameter with a nickel mine whole tailings as the experimental object. The results show that the permeability coefficient of specimens without flocculants follows the law of decreasing quadratic function with concentration of specimens increasing, and the concentration of specimens can significantly affect the permeability of specimens. When the mass concentration of specimens is 64%, the permeability coefficient of specimens first decreases and then increases with the increase of flocculant unit consumption; when the mass concentration of the sample is 66% to 70%, the permeability coefficient of the sample increases first and decreases with the increase of the flocculant unit consumption, but then increases all the time; under the condition that the mass concentration of the paste is 68% and the unit consumption of the flocculant is 20 g/t, the sample has the strongest resistance to permeation damage. From the examination of the permeability, seepage stability and economic indexes of the paste stockpile, it can be concluded that the best critical discharge mass concentration of the tailing sand is between 66% and 70%, that the effect of the flocculant unit consumption of 20 g/t for the paste stockpile is the best , and that this indoor test can provide theoretical support for the paste stockpile technology.
作者简介: 尹升华,北京科技大学土木与资源工程学院教授、博士研究生导师。2003年中南大学资源与安全工程学院采矿工程专业本科毕业,2006年中南大学资源与工程学院采矿工程专业硕士毕业,2010年北京科技大学采矿工程专业博士毕业后留校任教至今,目前主要从事溶浸采矿、金属矿高效开采及矿山岩体力学等方面的研究工作。发表论文100余篇,包括Construction and Building Materials, International Journal of Minerals、Metallurgy and Materials、 Bioresource Technology、 Engineering Geology等。
引用本文:
尹升华, 曹永, 吴爱祥, 侯永强, 杨世兴. 料浆浓度与絮凝剂单耗对膏体堆存渗透性及破坏研究[J]. 材料导报, 2022, 36(24): 21070202-6.
YIN Shenghua, CAO Yong, WU Aixiang, HOU Yongqiang, YANG Shixing. Study of Slurry Concentration and Flocculant Unit Consumption on the Permeability and Damage of Paste Stockpiles. Materials Reports, 2022, 36(24): 21070202-6.
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2022, Vol. 36 
