(1. 北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京 100083;
2. 北京科技大学土木与环境工程学院, 北京 100083)
摘 要: 全尾砂絮凝沉降过程是膏体充填工艺的重要环节。为考察多因素耦合条件下尾砂絮凝沉降规律，开展全尾砂静态絮凝沉降实验，应用Design-Expert软件分析并筛选影响全尾砂絮凝沉降的重要因素，探究单位面积处理量最大时各重要影响因素的最优值。结果表明：不同影响因素耦合条件下，各絮凝沉降曲线形态基本一致，呈现先迅速下降后趋于水平的趋势。影响絮凝沉降的重要因素为尾砂入料浓度、絮凝剂用量、絮凝剂溶液浓度，其最优值分别为16.02%、28.35 g/t、0.1541%，此时单位面积固体处理量最大，为3.04 t/(m2？h)。
关键字: 充填采矿法；全尾砂；絮凝沉降；影响因素；最优值
（1. Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal,
University of Science and Technology Beijing, Beijing 100083, China;？
2. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:Unclassified tailings flocculation sedimentation process is an important part of paste filling process. In order to investigate the law of the flocculation sedimentation in the multi-factors coupling condition, the unclassified tailings flocculation sedimentation experiments by Design-Expert software design were carried out. Besides, the important influence factors of the unclassified tailings flocculation sedimentation and the optimal value were analyzed and selected when the solid processing volume per unit area was the best. The results show that the trends of the flocculation sedimentation curves are consistent basically in the coupling conditions of different influence factors, decreasing rapidly first and tending to level finally. The important influence factors of unclassified tailings flocculation sedimentation are tailings slurry concentration, flocculant unit consumption and flocculant solution concentration, and the optimal values successively are 16.02%, 28.35 g/t, 0.1541%. Meanwhile, the solid processing volume per unit area is the biggest (3.04 t/(m2？h)).
Key words: back-filling mining; unclassified tailings; flocculation sedimentation; influence factor; optimal volume
