全尾砂絮凝沉降特性实验研究  

Experiment study on the flocculation settlement characteristic of unclassified tailings

作　　者：焦华喆[1] 吴爱祥[1] 王洪江[1] 刘晓辉[1] 杨盛凯[1] 肖云涛[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《北京科技大学学报》2011年第12期1437-1441,共5页Journal of University of Science and Technology Beijing

基　　金："十一五"国家科技支撑计划资助项目(2006BAB02A01);新世纪人才支持计划资助项目(NECT-07-0070);国家自然科学基金重点资助项目(50934002);国家自然科学基金资助项目(51074013)

摘　　要：采用均匀法进行室内实验设计,研究絮凝剂单耗、絮凝剂溶液浓度和给料浓度三因素对固液分离技术中沉降速度和沉降浓度的影响.对实验数据进行回归分析后认为,各因素对沉降速度的影响程度从大到小为:给料浓度>絮凝剂单耗>絮凝剂溶液浓度.沉降速度与絮凝剂单耗、絮凝剂溶液浓度正相关,与给料浓度负相关;对沉降浆体浓度影响程度从大到小为:给料浓度>絮凝剂单耗>絮凝剂溶液浓度.沉降浓度与絮凝剂单耗、给料浓度正相关,与絮凝剂溶液浓度基本无关.利用非线性规划寻找最优配比,预测值与验证实验的实测值误差小于8%.推荐的深锥浓密机运行参数为絮凝剂单耗5 g.t-1,絮凝剂溶液浓度0.05%,给料浓度5.233%.Laboratory experiments were carried out by uniform design to investigate the effects of flocculant unit consumption,flocculant solution concentration and feed-slurry concentration on settling velocity and settling concentration in solid-liquid separation.According to the regression analysis of experimental data,the influence degrees of the three factors on settling velocity in descending order are feed-slurry concentration,flocculant unit consumption and flocculant solution concentration.Settling velocity shows a positive correlation with flocculant solution concentration and flocculant unit consumption,but a negative correlation with feed-slurry concentration.The influence degrees of the three factors on settling concentration in descending order are feed-slurry concentration,flocculant unit consumption and flocculant solution concentration.Settling concentration exhibits a positive correlation with flocculant solution concentration and feed-slurry concentration,but is independent of flocculant unit consumption.Nonlinear programme is used to find the optimal ratio,and the deviation of the predicted values and the measured ones from verification experiments is less than 8%.The recommended operating parameters for deep cone thickeners are the flocculant unit consumption of 5g·t-1,the flocculant solution concentration of 0.05% and feed-slurry concentration of 5.233%.

关 键 词：絮凝 沉降 尾砂 均匀设计法 

分 类 号：TD926.4[矿业工程—选矿]