Influence of coarse tailings on flocculation settlement
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第8期
论文作者：Shi Wang Xue-peng Song Xiao-jun Wang Qiu-song Chen Jian-chun Qin Yu-xian Ke
文章页码：1065 - 1074
摘 要：The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries. To study the influence of coarse particle tailings（CPTs） on the flocculation settlement of tailings slurries（TSs）, static flocculent settling tests, scanning electron microscopy observations, and laser particle size analyses were conducted using the tailings obtained from a copper mine. The results demonstrate that（i） in the accelerated and free settling process, CPTs did not directly settle at the bottom of graduated cylinders; instead, they were netted by the flocculent structures（FSs） and settled together more quickly. The CPTs accelerate the rapid settlement of TSs; the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.（ii） The most appropriate flocculant unit consumption（FUC） is 20 g·t-1, and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface（SLI）.（iii） In the effective settling space of the thickening facility, free water quickly flowed from the pores of FSs, which is reflected in the period from 0 to 1 min.
Shi Wang1，Xue-peng Song1，Xiao-jun Wang1，Qiu-song Chen2，Jian-chun Qin3，Yu-xian Ke1
1. School of Resources and Environmental Engineering, Jiangxi University of Science and Technology2. School of Resources and Safety Engineering, Central South University3. Department of Personnel, Guangxi University of Science and Technology
摘 要：The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries. To study the influence of coarse particle tailings（CPTs） on the flocculation settlement of tailings slurries（TSs）, static flocculent settling tests, scanning electron microscopy observations, and laser particle size analyses were conducted using the tailings obtained from a copper mine. The results demonstrate that（i） in the accelerated and free settling process, CPTs did not directly settle at the bottom of graduated cylinders; instead, they were netted by the flocculent structures（FSs） and settled together more quickly. The CPTs accelerate the rapid settlement of TSs; the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.（ii） The most appropriate flocculant unit consumption（FUC） is 20 g·t-1, and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface（SLI）.（iii） In the effective settling space of the thickening facility, free water quickly flowed from the pores of FSs, which is reflected in the period from 0 to 1 min.
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