(1. 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083;
2. 北京科技大學土木與環(huán)境工程學院, 北京 100083)
摘 要: 全尾砂絮凝沉降過程是膏體充填工藝的重要環(huán)節(jié)。為考察多因素耦合條件下尾砂絮凝沉降規(guī)律，開展全尾砂靜態(tài)絮凝沉降實驗，應用Design-Expert軟件分析并篩選影響全尾砂絮凝沉降的重要因素，探究單位面積處理量最大時各重要影響因素的最優(yōu)值。結(jié)果表明：不同影響因素耦合條件下，各絮凝沉降曲線形態(tài)基本一致，呈現(xiàn)先迅速下降后趨于水平的趨勢。影響絮凝沉降的重要因素為尾砂入料濃度、絮凝劑用量、絮凝劑溶液濃度，其最優(yōu)值分別為16.02%、28.35 g/t、0.1541%，此時單位面積固體處理量最大，為3.04 t/(m2？h)。
關鍵字: 充填采礦法；全尾砂；絮凝沉降；影響因素；最優(yōu)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
