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Flocculated unclassified tailings settling efficiency improvement by particle collision optimization in the feedwell

引用

International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2126-2135页

作者： Huazhe Jiao Weilin Chen Aixiang Wu Yang Yu Zhuen Ruan Rick Honaker Xinming Chen Jianxin Yu School of Civil Engineering Henan Polytechnic UniversityJiaozuo 454003China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo 454000China China Geological Environmental Monitoring Institute Beijing 100081China State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization Jiaozuo 454150China Mining Engineering Faculty University of KentuckyLexington 40506America

Efficient thickening of tailings is a prerequisite for the metal mine tailings backfill and surface disposal *** effective collision of ultrafine tailings particles in suspension with flocculant molecules is essential for flocs aggregates formation and *** feeding speed and flocculant adding method will lead to the failure of effective dispersion of flocculant and high particle content in thickener *** this work,the effect of turbulence intensity and flocculant adding method on floc size,strength,and movement characteristics are *** to solve the turbidity increased,a pilot-scale continuous thickening test was carried *** a single particle and multiple flocs of full tailings as the research object,the particle iterative settlement model of flocs was *** influence of turbulence intensity on collision effect is studied by tracking and simulating particle *** results show that in the process of single particle settlement,chaos appears in the iterative process owing to particle adhesion which caused by micro *** the turbulence intensity is 25.99%,the maximum particle size of tailings floc is 6.21 mm and the maximum sedimentation rate is 5.284 cm·s^(−1).The tailings floc presents a multi-scale structure of particle-force chain system when hindered settling,and the interweaving of strong and weak force chains constitutes the topological structure of *** results are applied to a thicker in plant,the flocculant addition mode and feed rate are optimized,and the flocs settling speed and overflow clarity are improved.

关键词： unclassified tailings flocculation settling rate thickener feedwell turbulence intensity flocs micro-structure

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