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《Journal of University of Science and Technology Beijing》 2011-12
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Experiment study on the flocculation settlement characteristic of unclassified tailings

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  
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%.
【Fund】: “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)
【CateGory Index】: TD926.4
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