微纳米气泡对细粒稀土矿物聚团行为的影响
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摘要
通过自制微纳米气泡产生装置,研究微纳米气泡对细粒稀土矿物聚团行为的影响。运用图像拍摄系统和Image J图像处理软件,对絮团进行了粒度级的划分,通过统计学的方法和Stokes沉降公式对每个粒度级的絮团与气泡的碰撞及吸附效率进行了分析与计算,较为直观的揭示了微纳米气泡对絮团形态特征的影响。研究结果表明:微纳米气泡的粒径会影响絮团粒度及密度,而絮团的粒径和絮团密度对碰撞效率和吸附效率起主导作用。
The effect of micro-nano bubbles on the aggregation behavior of fine-grain rare earth minerals was studied by a selfmade micro-nano bubble generating device.Using image capture system and Image J processing software,the particle sizes of flocs were divided into different levels.The collision and adsorption efficiency between flocs and bubbles of each particle size was analyzed and calculated by statistical method and Stokes sedimentation formula.The effect of micro-nano bubbles on the morphological characteristics of flocs was revealed intuitively.The results showed that the particle size of the micro-nano bubbles would affect the particle size and density of the flocs,while the particle size and density of the flocs played a leading role in collision and adsorption efficiency.
The effect of micro-nano bubbles on the aggregation behavior of fine-grain rare earth minerals was studied by a selfmade micro-nano bubble generating device.Using image capture system and Image J processing software,the particle sizes of flocs were divided into different levels.The collision and adsorption efficiency between flocs and bubbles of each particle size was analyzed and calculated by statistical method and Stokes sedimentation formula.The effect of micro-nano bubbles on the morphological characteristics of flocs was revealed intuitively.The results showed that the particle size of the micro-nano bubbles would affect the particle size and density of the flocs,while the particle size and density of the flocs played a leading role in collision and adsorption efficiency.
引文
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[17]李大勇,王伟杰,赵学增.固液界面纳米气泡研究[J].化学进展,2012(8):1447-1455.
[18]王婕,等.煤泥絮团分选超净煤的试验研究[J].煤炭学报,2015(8):1929-1935.
[19]于保强.微细粒稀土矿物浮选研究[D].北京:北京有色金属研究总院,2014.
[20]邹文杰,曹亦俊,孙春宝.煤泥选择性絮凝浮选中颗粒间相互作用研究[J].中国矿业大学学报,2015(6):1061-1067.
[21]赵静,付晓恒,宋杨国,等.絮团形态学特征对絮团与气泡碰撞、吸附的影响的影响[J].煤炭学报,2017(3):738-744.
[2]宋少先,李长根,崔洪山.细粒矿物絮团浮选的理论和应用[J].国外金属矿选矿,2007(5):4-9+40.
[3]黄波.界面分选技术[M].北京:煤炭工业出版社,2008:32+191.
[4]谢登峰.选择性絮凝-浮选法制备超纯煤的试验研究[J].选煤技术,2008(5):25-27.
[5]骆庆群,杨洁明.基于纳米气泡的煤炭浮选模型研究[J].太原理工大学学报,2014(2):201-209.
[6]CALGAROTO S.On the nanobubbles interfacial properties and future applications in flotation[J].Minerals Engineering,2014,60(6):33-40.
[7]NAJAFI A S,DRELICH J,YEUNG A,et al.A novel method of measuring electrophoretic mobility of gas bubbles[J].Journal of Colloid and Interface Science,2007,308(2):344-350.
[8]SOBHY A.Nanobubble column flotation of fine coal particles and associated fundamentals[J].International Journal of Mineral Processing,2013,124(6):109-116.
[9]MATSUMOTO M,TANAKA K.Nanobubble-size dependence of surface tension and inside pressure[J].Fluid Dynamics Research,2008,40(7):546-553.
[10]RAHMAN A.Nano-microbubble flotation of fine and ultrafine chalcopyrite particles[J].International Journal of Mining Science and Technology,2014,24(4):559-566.
[11]FAN M,TAO D,HONAKER R,et al.Nanobubble generation and its applications in froth flotation(part II):fundamental study and theoretical analysis[J].Mining Science and Technology(China),2010,20(2):159-177.
[12]XIONG Y.Bubble size effects in coal flotation and phosphate reverse flotation using apico-nano bubble generator[D].Morgantown:West Virginia University,2014:70-83.
[13]WEIJS J H,LOHSE D.Why surface nanobubbles live for hours[J].Physical review letters,2013,110(5):54-61.
[14]郭明明.煤泥浮选过程中气泡与煤及矿物质粘附几率的研究[D].太原:太原理工大学,2017.
[15]葛英勇,侯静涛,余俊.微细粒矿物浮选技术进展[J].金属矿山,2010(12):90-94+106.
[16]赵静.超净煤分选过程中絮团形成机理的研究[D].北京:中国矿业大学(北京),2017.
[17]李大勇,王伟杰,赵学增.固液界面纳米气泡研究[J].化学进展,2012(8):1447-1455.
[18]王婕,等.煤泥絮团分选超净煤的试验研究[J].煤炭学报,2015(8):1929-1935.
[19]于保强.微细粒稀土矿物浮选研究[D].北京:北京有色金属研究总院,2014.
[20]邹文杰,曹亦俊,孙春宝.煤泥选择性絮凝浮选中颗粒间相互作用研究[J].中国矿业大学学报,2015(6):1061-1067.
[21]赵静,付晓恒,宋杨国,等.絮团形态学特征对絮团与气泡碰撞、吸附的影响的影响[J].煤炭学报,2017(3):738-744.
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