浮选柱气含率的影响因素研究进展
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摘要
气含率是影响浮选柱浮选性能的重要因素,受设备结构和操作参数两类因素的影响。分析了柱体长径比、水平和竖直挡板的数量和结构、充气器的结构等设备结构因素、充气和给矿速率、固体颗粒和起泡剂的类型及浓度等因素对气含率的影响规律,指出优化设备结构使气含率处于对矿物浮选最有利的范围,可提高矿物浮选指标。实际生产应用中一般通过调节充气速率、给矿流速和起泡剂的类型及用量,以获得最佳的气含率,同时指明提高气含率是今后浮选柱的一个研究方向。
Gas holdup plays an important role in flotation column and it is affected by column structure and operating parameters. It was analyzed that the influence rule of structural factors incuding height to diameter ratio,quantity and structure of vertical and horizontal baffles,aerator structure,operation parameters such as velocity of aeration and feeding,type and concentration of solid particles and foaming agent on gas holdup. Optimization of column structure keeping gas holdup in the best range for mineral flotation could improve the flotation targets of objective mineral; In actual production applications,it is feasible to adjust aeration and feeding velocity,type and dosage of foaming agent to get optimum gas holdup.Meanwhile,it is also indicated that gas holdup enhancement will be an important research field of flotation column in future.
Gas holdup plays an important role in flotation column and it is affected by column structure and operating parameters. It was analyzed that the influence rule of structural factors incuding height to diameter ratio,quantity and structure of vertical and horizontal baffles,aerator structure,operation parameters such as velocity of aeration and feeding,type and concentration of solid particles and foaming agent on gas holdup. Optimization of column structure keeping gas holdup in the best range for mineral flotation could improve the flotation targets of objective mineral; In actual production applications,it is feasible to adjust aeration and feeding velocity,type and dosage of foaming agent to get optimum gas holdup.Meanwhile,it is also indicated that gas holdup enhancement will be an important research field of flotation column in future.
引文
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[19]Sarhan A R,Naser J,Brooks G.CFD Modeling of Three-phase Flotation Column Incorporating a Population Balance Model[J].ProcediaEngineering,2017(4):313-317.
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[21]Ityokumbul M T,Salama A,Taweel A.Estimation of bubble size in flotation columns[J].Minerals Engineering,1995(8):77-89.
[22]Valkovska D S,Danov K D,Ivanov I B.Effect of surfactants on the stability of films between two colliding small bubbles[J].Physicochemical and Engineering Aspects,2000(175):179-192.
[23]Beneventi D,Allix J,Zeno E,et al.Influence of surfactant concentration on the ink removal selectivity in a laboratory flotation column[J].International Journal of Mineral Processing,2008(3):134-140.
[24]Luo X,Lee D J,Lau R,et al.Maximum stable bubble size and gas holdup in high-pressure slurry bubble columns[J].International Journal of Mineral Processing,1999,45(4):665-680.
[25]朱友益,张强,王化军,等.LHJ浮选柱流体静力学研究[J].北京科技大学学报,1999(2):15-18.
[26]程瑜,宋永胜,李宾.旋流喷射浮选柱气含率影响因素研究[J].金属矿山,2008(12):116-120.
[27]岳双凌,刘炯天,廖寅飞.工业浮选柱的气含率测定及其影响因素研究[J].矿山机械,2012(2):80-84.
[28]胡卫新,刘炯天,李振,等.旋流-静态微泡浮选柱气含率影响因素研究[J].中国矿业大学学报,2010,39(4):617-621.
[29]廖寅飞,桂夏辉,刘炯天,等.浮选柱气含率影响因素及其回归模型研究[J].煤炭科学技术,2011,39(3):108-111,124.
[2]张海军.浮选柱的自吸封闭式泡沫输配研究[D].徐州:中国矿业大学,2009.
[3]Matiolo E,Testa F,Yianatos J,et al.On the gas dispersion measurements in the collection zone of flotation columns[J].International Journal of Mineral Processing,2011(3):78-83.
[4]Tao D,Luttrell G H,Yoon R H.An experimental investigation on column flotation circuit configuration[J].International Journal of Mineral Processing,2000(3):37-56.
[5]Bouchard J,Desbiens A,Del Villar R,et al.Column flotation simulation and control:An overview[J].Minerals Engineering,2009,22(6):519-529.
[6]Vadlakonda B,Mangadoddy N.Hydrodynamic study of two phase flow of Column Flotation using Electrical Resistance Tomography and Pressure Probe techniques[J].Separation and Purification Technology,2017(4):168-187.
[7]朱友益,张强,王化军.新结构短柱体浮选柱的研究现状[J].化工矿山技术,1996(5):23-26.
[8]荀志远,张强,王化军.低高度浮选柱几个重要参数的研究[J].金属矿山,1998(3):25-27.
[9]Wang J,Wang L,Hanotu J,et al.Improving the performance of coal flotation using oscillatory air supply[J].Fuel Processing Technology,2017(5):131-137.
[10]李延锋,张敏,刘炯天.浮选柱筛板充填的气含率研究[J].中国矿业大学学报,2008(2):255-258.
[11]胡卫新.浮选柱气含率的影响机制与调控研究[D].徐州:中国矿业大学,2010.
[12]Auxiliadora M,Persechini M.Application of Adaptive Control for a Pilot-Scale Flotation Column[J].Ifac Proceedings Volumes,2009(23),84-89.
[13]El-Shall H,Sharma R,Abdel-Khalek N A,et al.Column flotation of Florida phosphate:An optimization study[J].Minerals&Metallurgical Processing,2001,18(3):142-146.
[14]廖寅飞,刘炯天,李树磊.煤泥柱浮选的承载能力与气含率轴向分布[J].煤炭学报,2013,38(8):1443-1447.
[15]Uribe-Salas A,Perez-Garibay R,Nava-Alonso F.Operating parameters that affect the carrying capacity of column flotation of a zinc sulfide mineral[J].Minerals Engineering,2007,20(7):710-715.
[16]Uribe-Salas A,Lira-Gomez P D,Pérez-Garibay R,et al.Overloading of gas bubbles in column flotation of coarse particles and effect upon recovery[J].International Journal of Mineral Processing,2003,71(1-4):167-178.
[17]Sarhan A R,Naser J,Brooks G.CFD simulation on influence of suspended solid particles on bubbles'coalescence rate in flotation cell[J].International Journal of Mineral Processing,2016(11):54-64.
[18]Sarhan A R,Naser J,Brooks G.CFD analysis of solid particles properties effect in three-phase flotation column[J].Separation and Purification Technology,2017(4):1-9.
[19]Sarhan A R,Naser J,Brooks G.CFD Modeling of Three-phase Flotation Column Incorporating a Population Balance Model[J].ProcediaEngineering,2017(4):313-317.
[20]Banisi S,Finch J A,Laplante A R,et al.Effect of solid particles on gas holdup in flotation columns-II.Investigation of mechanisms of gas holdup reduction in presence of solids[J].1995,50(14):2335-2342.
[21]Ityokumbul M T,Salama A,Taweel A.Estimation of bubble size in flotation columns[J].Minerals Engineering,1995(8):77-89.
[22]Valkovska D S,Danov K D,Ivanov I B.Effect of surfactants on the stability of films between two colliding small bubbles[J].Physicochemical and Engineering Aspects,2000(175):179-192.
[23]Beneventi D,Allix J,Zeno E,et al.Influence of surfactant concentration on the ink removal selectivity in a laboratory flotation column[J].International Journal of Mineral Processing,2008(3):134-140.
[24]Luo X,Lee D J,Lau R,et al.Maximum stable bubble size and gas holdup in high-pressure slurry bubble columns[J].International Journal of Mineral Processing,1999,45(4):665-680.
[25]朱友益,张强,王化军,等.LHJ浮选柱流体静力学研究[J].北京科技大学学报,1999(2):15-18.
[26]程瑜,宋永胜,李宾.旋流喷射浮选柱气含率影响因素研究[J].金属矿山,2008(12):116-120.
[27]岳双凌,刘炯天,廖寅飞.工业浮选柱的气含率测定及其影响因素研究[J].矿山机械,2012(2):80-84.
[28]胡卫新,刘炯天,李振,等.旋流-静态微泡浮选柱气含率影响因素研究[J].中国矿业大学学报,2010,39(4):617-621.
[29]廖寅飞,桂夏辉,刘炯天,等.浮选柱气含率影响因素及其回归模型研究[J].煤炭科学技术,2011,39(3):108-111,124.