超细全尾砂絮凝沉降实验研究  

Experimental study on flocculating sedimentation of ultra-fine unclassified tailings

作　　者：张钦礼[1] 周登辉[1] 王新民[1] 赵建文[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《广西大学学报（自然科学版）》2013年第2期451-455,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(2008BAB32B03)

摘　　要：针对超细全尾砂难以沉降的问题,为确定合理的全尾砂沉降参数,选取尾砂浓度、絮凝剂单耗和絮凝剂浓度作为影响因素,依据单一变量和均匀实验原则,进行全尾砂絮凝沉降实验,并利用SPSS软件对实验数据进行回归分析。实验结果表明,采用先添加聚合氯化铝250 g/t,后添加阴离子聚丙乙酰胺(作为主絮凝剂,其分子量为1.8×107,浓度为0.04%)45 g/t,尾砂浓度为5%时,全尾砂沉降效果最好。各因素对沉降速度影响程度为:尾砂浓度>絮凝剂单耗>絮凝剂浓度。研究结果对矿山全尾砂絮凝沉降各因素的控制具有很好的指导作用。To deal with the sedimentation problem for the unclassified tailings, and determine the reasonable settlement parameters of classified railings, by choosing railings concentration, flocculant solution concentration and flocculant unit consumption as influence factors, the flocculation settle- ment experiments were carried out based on the principle of single variable and orthogonal test. The experimental data was processed by regression analysis with the software SPSS. The results showed that the optimum settlement effect was obtained with the tailings concentration of 5% when the addi- tion of PAC was 250 g/t followed by the addition of 45 g/t APAM the main flocculant with the mo- lecular mass of 18 million at concentration of 0. 04%. The order of factors that influences the settling velocity in descending is tailings concentration, the flocculant unit consumption and flocculant solu- tion concentration. The experimental conclusion provides a good guidance to control flocculent settle- ment parameters on the flocculent settlement of classified tailings in mines.

关 键 词：超细尾砂 絮凝沉降 均匀设计 回归分析 

分 类 号：TD235.4[矿业工程—矿井建设]