排浆速度对尾矿沉积影响的模型试验研究
发布时间：2018-08-09 19:14
【摘要】：尾矿库中尾砂的沉积规律受颗粒级配、浆体浓度和排浆速度等因素的影响,其中排浆速度是影响尾矿沉积规律的主要因素之一。本文采用自行研制的水力分选粒度分析装置,对阜新同乃铁尾矿砂进行排浆速度分别为0.15cm/s、0.30cm/s、0.45cm/s的尾矿沉积模型试验。研究结果表明:(1)通过单粒尾矿砂临界状态分析,得到了尾矿颗粒运动-沉积临界速度关系和尾矿沉积判据,并通过试验验证其正确性。(2)沉积滩坡度随排浆速度的增加而减小,沉积池内的沉积坡度几乎不受排浆速度影响。(3)排浆速度越大,水平方向尾矿颗粒的分选性越好,以中值粒径为0.040mm代表,三种流速对应位置分别为61.4cm、70.8cm和76.7cm。
[Abstract]:The sedimentation law of tailings in tailings reservoir is affected by particle gradation, slurry concentration and slurry discharging rate, among which the rate of slurry drainage is one of the main factors affecting the deposition law of tailings. In this paper, a self-developed hydraulic separation granularity analysis device is used to test the sediment model of the tailings of Tonai iron tailings in Fuxin, with slurry discharge velocity of 0.15 cm / s 0.30 cm / s and 0.45 cm / s of iron tailings respectively. The results show that: (1) by analyzing the critical state of single tailings, the relationship between the movement of tailing particles and the critical velocity of sediment deposition and the criterion of tailings deposition are obtained, and the correctness of these criteria is verified by experiments. (2) the slope of sediment beach decreases with the increase of slurry discharge velocity. (3) the higher the slurry velocity, the better the separation of horizontal tailings particles, represented by the median particle size of 0.040mm, and the corresponding positions of the three velocities are 61.4 cm / 70.8 cm and 76.7 cm / cm respectively.
【作者单位】： 辽宁工程技术大学力学与工程学院;辽宁工程技术大学土木与交通学院;辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金资助项目(5157041488,5150041215)
【分类号】：TV149
本文编号：2175052
[Abstract]:The sedimentation law of tailings in tailings reservoir is affected by particle gradation, slurry concentration and slurry discharging rate, among which the rate of slurry drainage is one of the main factors affecting the deposition law of tailings. In this paper, a self-developed hydraulic separation granularity analysis device is used to test the sediment model of the tailings of Tonai iron tailings in Fuxin, with slurry discharge velocity of 0.15 cm / s 0.30 cm / s and 0.45 cm / s of iron tailings respectively. The results show that: (1) by analyzing the critical state of single tailings, the relationship between the movement of tailing particles and the critical velocity of sediment deposition and the criterion of tailings deposition are obtained, and the correctness of these criteria is verified by experiments. (2) the slope of sediment beach decreases with the increase of slurry discharge velocity. (3) the higher the slurry velocity, the better the separation of horizontal tailings particles, represented by the median particle size of 0.040mm, and the corresponding positions of the three velocities are 61.4 cm / 70.8 cm and 76.7 cm / cm respectively.
【作者单位】： 辽宁工程技术大学力学与工程学院;辽宁工程技术大学土木与交通学院;辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金资助项目(5157041488,5150041215)
【分类号】：TV149
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