絮凝沉降对全尾砂料浆流变特性的影响  

Effect of flocculation settling on rheological characteristics of full tailing slurry

作　　者：杨柳华[1,2] 王洪江[1,2] 吴爱祥[1] 李红[1,2] 陈辉[1] 霍成月 YANG Liuhua WANG Hongjiang WU Aixiang LI Hong CHEN Hui HUO Chengyue(School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, Beijing 100083, China School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083 [3]北京科技大学化学与生物工程学院,北京100083

出　　处：《中南大学学报（自然科学版）》2016年第10期3523-3529,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51374034);国家"十二五"科技支撑计划项目(2012BAB08B02)~~

摘　　要：通过研究沉降后料浆流变参数变化规律,探索基于料浆流变特性作为全尾砂絮凝沉降参数优化的可行性。以某铜锌矿全尾砂为实验材料,通过考察絮凝剂种类、入料体积分数、絮凝剂单耗这3个因素,进行静态絮凝沉降及料浆流变测试实验。实验结果表明：在絮凝剂种类筛选实验中,所选4种絮凝剂沉降效果区别较小,不同絮凝沉降后料浆屈服应力相差不大,添加N123作为絮凝剂时料浆黏度最小,絮团内部水分容易被挤出,絮凝沉降效果最佳;在入料体积分数及单耗实验中,当入料体积分数为10%~15%、絮凝剂单耗为25 g/t时,单位面积固体处理量和底流体积分数均较高,并且屈服应力及黏度达到极小值,有利于料浆进一步压密脱水及耙架运行。The feasibility of optimizing flocculation settling parameters by analyzing how slurry rheological parameters change was tested. The flocculation settling experiments and the slurry rheological tests were carried out with full tailings from a copper zinc deposit in which three factors（flocculant type, feed slurry concentration and flocculant dosage） were studied. The results show that in the flocculant type screening experiments, there is little difference between the four flocculants and the yield stress of their respective slurries. The slurry has the minimum viscosity when using N123, and the inside water of aggregates can be easily extruded, thus the best flocculation settling results are obtained. The solid flux and the underflow volume fraction are high when the feed slurry concentration is 10%-15% and the flocculant dosage is 25 g/t. Meanwhile, the minimum yield stress and viscosity can be reached, which benefits the consolidation dewatering and rake running.

关 键 词：絮凝沉降 流变特性 压密脱水 絮凝剂 

分 类 号：TD853[矿业工程—金属矿开采]