全尾砂动态絮凝沉降试验研究  

Experimental study on dynamic flocculating sedimentation of unclassified tailings

作　　者：卞继伟[1] 王新民[1] 肖崇春 BIAN Jiwei;WANG Xinmin;XIAO Chongchun(School of Resources and Safety Engineering, Central South University, Changsha 410083, China;Feny Ltd., Changsha 410600, China)

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]飞翼股份有限公司,湖南长沙410600

出　　处：《中南大学学报（自然科学版）》2017年第12期3278-3283,共6页Journal of Central South University:Science and Technology

基　　金：国家"十二五"科技支撑计划项目(2012BAC09B02)~~

摘　　要：运用浓密机动态试验装置,通过连续进料和连续放砂,以沉降速度、底流质量分数、溢流水悬浮物质量浓度作为动态絮凝沉降效果的评价指标,研究不同条件下全尾砂动态絮凝沉降的变化规律。研究结果表明:沉降速度与絮凝剂单耗、供料速度、料浆质量分数均呈正相关;底流质量分数随絮凝剂单耗的增加先增加后基本保持不变,与供料速度呈负相关,与料浆质量分数呈正相关;溢流水悬浮物质量浓度与絮凝剂单耗呈正相关,与供料速度、料浆质量分数均呈负相关。确定该尾砂最佳动态絮凝沉降条件如下:絮凝剂单耗为10 g/t,供料速度为1.5L/min,全尾砂料浆质量分数为13%左右。Taking sedimentation velocity,underflow density and suspended solid concentration of overflow water as the evaluation indexes of dynamic flocculating sedimentation effect,the changing laws of dynamic flocculating sedimentation of unclassified tailings were experimented at different conditions using the dynamic test apparatus of thickener for continuous feeding and continuous sands-discharge.The results show that there is a clear positive correlation between the sedimentation velocity and the changes of flocculant consumption,feed velocity and solution concentration.The underflow density increases firstly with the increase of the flocculant consumption,then remains unchanged,and it has negative correlation with the feed velocity and positive correlation with solution concentration.The suspended solid concentration of overflow water is positively correlated with flocculant consumption,but is negatively correlated with feed velocity and solution concentration.The best conditions for dynamic flocculating sedimentation are as follows:flocculant consumption is10g/t;the feed velocity is1.5L/min,and the solution concentration is about13%.

关 键 词：全尾砂 动态沉降 絮凝沉降 

分 类 号：TD853[矿业工程—金属矿开采]