• 标题：Effect of pores on the flotation of low-rank coal: An experiment and simulation study
• 关键词：Low-rank coal,Pore,Molecular dynamics,Bubble,Flotation
• 作者：Liang Shen, Chuanzhen Wang, Fanfei Min, Lingyun Liu, Changguo Xue

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Low rank coal contains a large number of pores and cracks which have an adverse inflfluence on its flflotation behavior. Effffects of pores on the hydration layer and flflotation behavior of low-rank coal were studied by molecular dynamics method and experiments in this paper. A specifific surface area/pore analyzer was employed to determine the pore structure. Pore distribution analysis indicated that the pores in the low-rank coal are mainly micropores. Pore volume and average pore diameter in low-rank coal can be reduced by pore compression pretreatment. Coal-bubble attachment experiments were conducted to study the effffect of pores on the effffect of pores on particle bubble adhesion process. Results showed that coal particles with less pores were more likely to adhere to the surface of the bubble. And a probable mechanism for the effffect of pores on the adhesion of coal particles to bubbles was proposed. Molecular dynamics simulation results revealed that the pores on the surface of low-rank coal reduce the mobility of water molecules and form a more stable hydration layer. Flotation results indicated that reducing the pore content in low-rank coal could reduce the collector dosage in flflotation process and improve the flflotation behavior of low-rank coal.