Abstract
The residue drying area (RDA) is the major source of fugitive red sand (RS) dust emissions in the bauxite mining industry and causes serious environmental and safety detriments. Polymer stabilizer (PS) is one of the promising non-traditional stabilizers to mitigate such issues. This research investigated the unconfined compressive strength (UCS) of RS using synthetic polymer stabilizer (SPS) and natural polymer stabilizer (NPS), and to determine the optimum application concentration and mixing ratio of the PAM and Guar gum mixture. Results illustrated that PAM apparently outperform Guar gum in stabilizing sand particles. The mixture of PAM and Guar gum is more effective than individual use. The optimum polymer concentration and the mixing ratio are 0.94 wt.% and 0.6 (PAM: total (PAM + Guar gum)), respectively. A rigorous regression model was developed to predict the UCS value based on application concentration and mixing ratio for the purpose of cost and time efficiency.
摘要
在铝土矿产业中,尾矿库作为主要尘源会导致严重的环境及安全问题。使用高分子固沙剂降低 尾矿库扬尘是较有潜力的治理方案。本文深入研究了人工合成高分子材料聚丙烯酰胺及天然高分子材 料瓜尔胶对铝土矿尾矿砂单轴抗压强度的影响并得出了两种固沙剂的最优配比。结果表明,聚丙烯酰 胺在固沙效能上高于瓜尔胶且两者混合使用的效果优于单一使用。聚丙烯酰胺及瓜尔胶在0.94 wt. % 浓度及3:2 混合时达到最优固沙效果。本文同时提出了基于两种固沙剂不同浓度及配比条件下的有效 快速预测单轴抗压强度的数学模型。
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Foundation item: Project(2016YFC0501103) supported by the National Key Research and Development Program of China; Project(51574222) supported by the General Program of National Science Foundation of China; Project(SKLCRSM15KF01) supported by Independent Research Projects of State Key Laboratory of Coal Resources and Safe Mining, CUMT, China; Project(2015) supported by the Mining Education Australia Collaborative Research Grant Scheme
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Ding, Xh., Xu, G., Zhou, W. et al. Treatment of bauxite residue dust pollution by improving structural stability via application of synthetic and natural polymers. J. Cent. South Univ. 26, 440–448 (2019). https://doi.org/10.1007/s11771-019-4016-8
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DOI: https://doi.org/10.1007/s11771-019-4016-8