料浆浓度与絮凝剂单耗对膏体堆存渗透性及破坏研究

doi:10.11896/cldb.21070202

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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.

Key words： paste stockpile paste mass concentration flocculant unit consumption permeability coefficient permeation damage

Published: Online: 2023-01-03

CLC number:

TD853

Fund:Key Program of National Natural Science Foundation of China(51734001) and the Fundamental Research Funds for the Central Universities (FRT-TP-18-003C1).

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	Articles by authors
	YIN Shenghua
	CAO Yong
	WU Aixiang
	HOU Yongqiang
	YANG Shixing

Cite this article:

YIN Shenghua,CAO Yong,WU Aixiang, et al. Study of Slurry Concentration and Flocculant Unit Consumption on the Permeability and Damage of Paste Stockpiles[J]. Materials Reports, 2022, 36(24): 21070202-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21070202 OR http://www.mater-rep.com/EN/Y2022/V36/I24/21070202

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