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Research on flocculation sedimentation characteristics of fine unclassified-tailings

Wang Yong1,Wang Hongjiang1,Wu Aixiang1,Li Hui1,Liu Hongjun1,2,Gu Zhijun1,3(1.School of Civil and Environmental Engineering,University of Science and Technology Beijing; 2.Inner Mongolia Mining Industry Co.,Ltd.,China National Gold Group Corporation; 3.China National Gold Group Corporation)  
Fine unclassified-tailings have slow settling speed and it's difficult for de-watering,which affects the paste preparation.Therefore,it is needed to use flocculant to improve the settlement characteristics of this kind of tailings.According to a mine's tailings physical properties,the flocculant N123 which has the quickest settlement speed is selected from 7 kinds of anionic polyacrylamide flocculants,and its indoor settlement experiments are carried out.The 3 factors 5 levels tests are established by uniform design method,and the different-level settling velocities and limiting concentration equations are regressed.Finally,we get the best combinations of factors.The effects of mortar retention time on flocculation are investigated.
【Fund】: 国家自然科学基金资助项目(50934002 51104011 51074013);; 长江学者和创新团队发展计划项目(TRT0950)
【CateGory Index】: TD926.4
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