喷射-搅拌耦合式煤泥浮选装置研究
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摘要
泡沫浮选是分选细粒矿物的有效方法。以浮选设备低能量损耗、高能量转化率为原则,结合喷射式浮选机与机械搅拌式浮选机的优点,与射流技术的有机耦合,设计了Ⅰ型、Ⅱ型2种新型浮选装置,介绍了2种装置的结构和工作原理,探讨了喷射吸气与搅拌吸气方式对气泡粒径分布、气泡矿化及流场均匀性的影响。Ⅰ型结合喷射吸气与搅拌吸气2种方式,能够实现浮选装置大吸气量、气泡粒径分布均匀、流场稳定。Ⅱ型喷射吸气搅拌型浮选机能在较低能耗、较低转速下得到较大吸气量,获得均匀的气液固三相流场。喷嘴的工况参数(入流压力、气液比等)、结构参数(喷嘴距、截面比等)是影响能量转化、浮选效果优劣的关键因素。本装置能同时对矿浆进行预处理和浮选。
Froth flotation is an effective separation method for fine minerals.Incorporated the principle of the flotation equipment with less power consumption,high energy conversion,two new types of flotation devices were designed by coupling jet technology.The effect of jet inspiration and stirring inspiration on particle size distribution of bubbles,bubble mineralization and flow field uniformity were researched.Jet inspiration and stirring inspiration aare combined in the Ⅱ type,which can realize large inspiratory capacity,uniform distribution of bubble size and stable flow field.The Ⅱ type is able to get large inspiratory capacity and uniform three phase flow field under the lower energy consumption and lower speed.The energy transformation and flotation efficiency are affectd by operating mode and structural parameters,such as inflow pressure,gas-liquid ratio,nozzle spacing,section ratio and so on. The flotation device achieves the purpose of pretreatment and flotation.
Froth flotation is an effective separation method for fine minerals.Incorporated the principle of the flotation equipment with less power consumption,high energy conversion,two new types of flotation devices were designed by coupling jet technology.The effect of jet inspiration and stirring inspiration on particle size distribution of bubbles,bubble mineralization and flow field uniformity were researched.Jet inspiration and stirring inspiration aare combined in the Ⅱ type,which can realize large inspiratory capacity,uniform distribution of bubble size and stable flow field.The Ⅱ type is able to get large inspiratory capacity and uniform three phase flow field under the lower energy consumption and lower speed.The energy transformation and flotation efficiency are affectd by operating mode and structural parameters,such as inflow pressure,gas-liquid ratio,nozzle spacing,section ratio and so on. The flotation device achieves the purpose of pretreatment and flotation.
引文
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[14]江明东,王微微,闫锐敏,等.喷射式浮选机浸没式充气搅拌装置结构参数的试验[J].洁净煤技术,2011,17(1):18-21.JIANG Mingdong,WANG Weiwei,YAN Ruimin,et al.Study on structure parameters of submerged aeration mixing device in a jet-type flotation machine[J].Clean Coal Technology,2011,17(1):18-21.
[15]TASDEMIR T,OTEYAKA B,TASDEMIR A.Air entrainment rate and holdup in the Jameson cell[J].Minerals Engineering,2007,20(8):761-765.
[16]田野,杨润全,王怀法.不同结构空化气泡发生器的试验研究[J].煤炭技术,2014,33(6):216-218.TIAN Ye,YANG Runquan,WANG Huaifa.Experimental study of different structure cavitation bubble generator[J].Coal Technology,2014,33(6):216-218.
[17]UCURUM M.Influences of Jameson flotation operation variables on the kinetics and recovery of unburned carbon[J].Powder Technology,2009,191(3):240-246.
[18]KARAGUZEL Cengiz,COBANO GLU Gülsah.Stage-wise flotation for the removal of colored minerals from feldspathic slimes using laboratory scale Jameson cell[J].Separation and Purification Technology,2010,74(1):100-107.
[19]王超,朱金波,胡标.环空淹没射流吸气性能与能量耗散特征研究[J].农业机械学报,2016,47(8):14-21.WANG Chao,ZHU Jinbo,Hu Biao.Suction performance and energy dissipation characteristics of annular submerged jets[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(8):14-21
[20]费之奎.基于喷射流驱动的混合流场浮选系统:CN201610057037.7[P].2016-05-11.
[21]朱金波.基于矿浆管道压力驱动的多叶轮混合流场矿浆预处理器:CN201610055568.2[P].2016-05-04.
[22]朱金波.一种具备高压射流搅拌功能的矿浆自驱动式浮选装置:CN201710446150.9[P].2017-09-29.
[23]朱金波.具备矿浆自驱动及自吸气功能的浮选设备:CN201710446149.6[P].2017-09-15.
[24]王超.一种自带整流装置的反击式环空喷射吸气搅拌式浮选机:CN201610161571.2[P].2016-06-08.
[25]周伟.一种利用矿浆驱动的旋转射流搅拌低能耗浮选设备:CN201610272332.4[P].2016-07-20.
[26]郭德,张秀梅,石常省,等.压强预处理对煤泥浮选效果的影响[J].煤炭学报,2011,36(8):1365-1369.GUO De,ZHANG Xiumei,SHI Changsheng,et al.The effect of pressure-based pre-treat on the flotation efficiency of coal slurry[J].Journal of China Coal Society,2011,36(8):1365-1369.
[2]艾光华,刘炯天,曹亦俊,等.旋流-静态微泡浮选柱强化回收微细粒黑钨矿[J].中南大学学报(自然科学版),2016,46(11):3983-3990.AI Guanghua,LIU Jiongtian,CAO Yijun,et al.Strengthened recovery of fine wolframite by cyclonic-static microbubble flotation column[J].Journal of Central South University(Science and Technology),2016,46(11):3983-3900.
[3]邢耀文,桂夏辉,刘炯天,等.基于能量适配的分级浮选试验研究[J].中国矿业大学学报,2015,44(5):923-929.XING Yaowen,GUI Xiahui,LIU Jiongtian,et al.Experimental study of classified flotation based on energy input and distribution[J].Journal of China University of Mining&Technology,2015,44(5):923-929.
[4]SHEN Zhengchang,CHEN Jianhua,ZHANG Chenhu,et al.Computational fluid dynamics simulation of gas-liquid two phase flow in320 m3air-blowing mechanical flotation cell using different turbulence models[J].Journal of Central South University,2015,22(6):2385-2392.
[5]闫小康,刘煜,张秀宝.旋流-静态微泡浮选柱旅游流场的数值模拟与试验测量[J].煤炭学报,2016,41(6):1560-1566.YAN Xiaokang,LIU Yu,ZHANG Xiubao.Numerical simulation and experimental measurement on the cyclonic flow field of a cyclonicstatic micro-bubble flotation column[J].Journal of China Coal Society,2016,41(6):1560-1566.
[6]HACIFAZLIOGLU H.Enrichment of silica sand ore by cyclojet flotation cell[J].Separation Science and Technology,2014,49(10):1623-1632.
[7]韩伟,李仁年,杨瑞,等.基于内流场分析的机械搅拌式浮选机改型设计[J].农业工程学报,2009,45(12):84-88.HAN Wei,LI Rennian,YANG Rui,et al.Redesign of mechanically agitated flotation machine based on interior flow fields simulation[J].Journal of Mechanical Engineering,2009,45(12):84-88.
[8]徐建修,赵环帅,孙玉涛,等.国内外浮选柱技术与装备现状及发展趋势[J].煤矿机械,2008,29(12):4-5XU Jianxiu,ZHAO Huanshuai,SUN Yutao,et al.Current statu and development trends on technology and equipment of flotation column both in domestic and overseas[J].Coal Mine Machinery,2008,29(12):4-5
[9]张鹏.XJM-S28(3+2)型浮选机的设计与应用[J].洁净煤技术,2014,20(2):13-16.ZHANG Peng.Design and application of special structure XJM-S type flotation machine[J].Clean Coal Technology,2014,20(2):13-16.
[10]廖达雄,陈吉明,余永生,等.引射器增强混合喷嘴性能实验研究[J].实验流体力学,2007,21(3):24-29.LIAO Daxiong,CHEN Jiming,YU Yongsheng,et al.Experimental study on the performance of mixing-enhancing nozzles in ejectors[J].Journal of Experiments in Fluid Mechanics,2007,21(3):24-29.
[11]杨友胜,郑建平,聂松林,等.水射流喷嘴能量损失研究[J].机械工程学报,2013,49(2):139-145.YANG Yousheng,ZHENG Jianping,NIE Songlin,et al.Energy loss of nozzles in water jet system[J].Chinese Journal of Mechanical Engineering,2013,49(2):139-145.
[12]陈建中,马晓东,沈丽娟.机械搅拌式与喷射式浮选机工艺效果比较[J].矿山机械,2014,42(7):103-105.CHEN Jianzhong,MA Xiaodong,SHEN Lijuan.Contrast of mechanical agitation flotator and jet flotator in technological effects[J].Mining&Processing Equipment,2014,42(7):103-105.
[13]李仁年,唐堃,韩伟,等.气液固三相流在机械搅拌充气式浮选机内运动的数值模拟[J].兰州理工大学学报,2009,35(1):37-40.LI Rennian,TANG Kun,HAN Wei,et al.Numerical simulation of gas-liquid-solid three-phase inner flow in mechanically stirring air-charging floatation machine[J].Journal of Lanzhou University of Technology,2009,35(1):37-40.
[14]江明东,王微微,闫锐敏,等.喷射式浮选机浸没式充气搅拌装置结构参数的试验[J].洁净煤技术,2011,17(1):18-21.JIANG Mingdong,WANG Weiwei,YAN Ruimin,et al.Study on structure parameters of submerged aeration mixing device in a jet-type flotation machine[J].Clean Coal Technology,2011,17(1):18-21.
[15]TASDEMIR T,OTEYAKA B,TASDEMIR A.Air entrainment rate and holdup in the Jameson cell[J].Minerals Engineering,2007,20(8):761-765.
[16]田野,杨润全,王怀法.不同结构空化气泡发生器的试验研究[J].煤炭技术,2014,33(6):216-218.TIAN Ye,YANG Runquan,WANG Huaifa.Experimental study of different structure cavitation bubble generator[J].Coal Technology,2014,33(6):216-218.
[17]UCURUM M.Influences of Jameson flotation operation variables on the kinetics and recovery of unburned carbon[J].Powder Technology,2009,191(3):240-246.
[18]KARAGUZEL Cengiz,COBANO GLU Gülsah.Stage-wise flotation for the removal of colored minerals from feldspathic slimes using laboratory scale Jameson cell[J].Separation and Purification Technology,2010,74(1):100-107.
[19]王超,朱金波,胡标.环空淹没射流吸气性能与能量耗散特征研究[J].农业机械学报,2016,47(8):14-21.WANG Chao,ZHU Jinbo,Hu Biao.Suction performance and energy dissipation characteristics of annular submerged jets[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(8):14-21
[20]费之奎.基于喷射流驱动的混合流场浮选系统:CN201610057037.7[P].2016-05-11.
[21]朱金波.基于矿浆管道压力驱动的多叶轮混合流场矿浆预处理器:CN201610055568.2[P].2016-05-04.
[22]朱金波.一种具备高压射流搅拌功能的矿浆自驱动式浮选装置:CN201710446150.9[P].2017-09-29.
[23]朱金波.具备矿浆自驱动及自吸气功能的浮选设备:CN201710446149.6[P].2017-09-15.
[24]王超.一种自带整流装置的反击式环空喷射吸气搅拌式浮选机:CN201610161571.2[P].2016-06-08.
[25]周伟.一种利用矿浆驱动的旋转射流搅拌低能耗浮选设备:CN201610272332.4[P].2016-07-20.
[26]郭德,张秀梅,石常省,等.压强预处理对煤泥浮选效果的影响[J].煤炭学报,2011,36(8):1365-1369.GUO De,ZHANG Xiumei,SHI Changsheng,et al.The effect of pressure-based pre-treat on the flotation efficiency of coal slurry[J].Journal of China Coal Society,2011,36(8):1365-1369.
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