D0I:10.13374/.issn1001-053x.2011.12.005 第33卷第12期 北京科技大学学报 Vol.33 No.12 2011年12月 Journal of University of Science and Technology Beijing Dec.2011 全尾砂絮凝沉降特性实验研究 焦华喆吴爱祥四王洪江刘晓辉 杨盛凯肖云涛 北京科技大学土木与环境工程学院，北京100083 区通信作者，E-mail:wuaixiang(@126.com 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5g·t·,絮凝 剂溶液浓度0.05%，给料浓度5.233%. 关键词絮凝：沉降；尾砂：均匀设计法 分类号TD926.4 Experiment study on the flocculation settlement characteristic of unclassified tail- ings JIAO Hua-zhe,WU Ai-xiang,WANG Hong-jiang,LIU Xiao-hui,YANG Sheng-kai,XIAO Yun-tao School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:wuaixiang@126.com ABSTRACT Laboratory experiments were carried out by uniform design to investigate the effects of flocculant unit consumption,floc- culant solution concentration and feed-slurry concentration on settling velocity and settling concentration in solidiquid separation.Ac- cording 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 corre- lation 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 concen- tration and feed-slurry concentration,but is independent of flocculant unit consumption.Nonlinear programme is used to find the opti- mal ratio,and the deviation of the predicted values and the measured ones from verification experiments is less than 8%.The recom- mended operating parameters for deep cone thickeners are the flocculant unit consumption of 5gt,the flocculant solution concentra- tion of 0.05%and feed-slurry concentration of 5.233%. KEY WORDS flocculation:settlement;tailings;uniform design 絮凝沉降在现代固液分离技术中应用十分广 如湿法治金浸取后矿浆的沉降分离-习以及堆浸液 泛，其中人们普遍关心的是固体颗粒沉降速度和沉 中少量悬浮物的分离净化B.在浓密作业中，其操 降浓度.在澄清作业中，要求能够快速获取含固率 作的重点是取得更稠的底流，加入絮凝剂后的沉降 最小的上清液，因此固体颗粒的沉降速度至关重要， 浓度成为关键参数，如从氰化浸取液中回收金 收稿日期：2010-1104 基金项目：“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(NECT07O070):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)第 33 卷 第 12 期 2011 年 12 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 33 No． 12 Dec． 2011 全尾砂絮凝沉降特性实验研究 焦华喆 吴爱祥 王洪江 刘晓辉 杨盛凯 肖云涛 北京科技大学土木与环境工程学院，北京 100083 通信作者，E-mail: wuaixiang@ 126． com 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% ． 关键词 絮凝; 沉降; 尾砂; 均匀设计法 分类号 TD926. 4 Experiment study on the flocculation settlement characteristic of unclassified tail￾ings JIAO Hua-zhe，WU Ai-xiang ，WANG Hong-jiang，LIU Xiao-hui，YANG Sheng-kai，XIAO Yun-tao School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China Corresponding author，E-mail: wuaixiang@ 126． com ABSTRACT Laboratory experiments were carried out by uniform design to investigate the effects of flocculant unit consumption，floc￾culant solution concentration and feed-slurry concentration on settling velocity and settling concentration in solid-liquid separation． Ac￾cording 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 corre￾lation 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 concen￾tration and feed-slurry concentration，but is independent of flocculant unit consumption． Nonlinear programme is used to find the opti￾mal ratio，and the deviation of the predicted values and the measured ones from verification experiments is less than 8% ． The recom￾mended operating parameters for deep cone thickeners are the flocculant unit consumption of 5 g·t － 1 ，the flocculant solution concentra￾tion of 0. 05% and feed-slurry concentration of 5. 233% ． KEY WORDS flocculation; settlement; tailings; uniform design 收稿日期: 2010--11--04 基金项目: “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) 絮凝沉降在现代固液分离技术中应用十分广 泛，其中人们普遍关心的是固体颗粒沉降速度和沉 降浓度． 在澄清作业中，要求能够快速获取含固率 最小的上清液，因此固体颗粒的沉降速度至关重要， 如湿法冶金浸取后矿浆的沉降分离［1--2］以及堆浸液 中少量悬浮物的分离净化［3--4］． 在浓密作业中，其操 作的重点是取得更稠的底流，加入絮凝剂后的沉降 浓度成为关键参数，如从氰化浸取液中回收金 DOI:10.13374/j.issn1001-053x.2011.12.005