环空射流浮选装置吸气性能研究
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摘要
利用引射吸气方式设计了一种环空射流浮选装置.为研究该浮选装置的吸气能力,对环空喷嘴在不同入料压力、喷嘴距下的吸气量、负压及叶轮转速的关系进行研究,分析射流吸气能力受射流边界层厚度2e与喷嘴出口直径D参数间关系的影响规律.结果表明:在同一喷嘴距条件下,环空喷嘴吸气量及喷嘴内的负压值随入料压力的增加逐渐增加,叶轮转速随入料压力增加先增加后平缓而后再增加;低入料压力、小喷嘴距条件下, 2e An annular jet flotation device was designed according to the jet suction mode. In order to study the inspiratory capacity of the flotation device, the relationship between the suction volume, negative pressure and impeller speed of the annular nozzle under different feeding pressure and nozzle distance was studied. The influence of jet boundary layer thickness 2e and the nozzle exit diameter D on jet suction capacity was also analyzed. The results show that the annular nozzle suction volume and the negative pressure gradually increase with the increase of the feeding pressure under the same nozzle distance condition; the impeller speed first increases, then remains steady and goes up again. Under the condition of low feeding pressure and small nozzle distance, 2e
引文
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[17] 段旭琴,宋猛,王晓宁,等.喷射式浮选机空气反应器数值计算及实验验证[J].煤炭学报,2015,40(增1):259-264.DUAN Xuqin,SONG Meng,WANG Xiaoning,et al.Numerical simulation of air-pulp mixer of jet flotation machine and experimental verification[J].Journal of China Coal Society,2015,40(Sup1):259-264.
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[19] 杨友胜,张建平,聂松林.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,ZHANG Jianping,NIE Songlin.Energy loss of nozzles in water jet system[J].Journal of Mechanical Engineering,2013,49(2):139-145.
[20] 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.
[21] 卢义玉,刘勇,夏彬伟,等.石门揭煤钻孔布置优化分析及应用[J].煤炭学报,2011,36(2):283-287.LU Yiyu,LIU Yong,XIA Binwei,et al.The novel technology of drilling arrangement of rock cross-cut coal uncovering basing on theoretical analysis[J].Journal of China Coal Society,2011,36(2):283-287.
[22] 陆宏圻.喷射技术理论及应用[M].武汉:武汉大学出版社,2004:16-53.LU Hongqi.Theory and application of jet technology[M].Wuhan:Wuhan University Press,2004:16-53.
[23] 刘勇,陈长江,刘笑天,等.高压水射流破岩能量耗散与释放机制[J].煤炭学报,2017,42(10):2609-2615.LIU Yong,CHEN Changjiang,LIU Xiaotian,et al.Mechanism on energy dissipation and release of rock breakage with high pressure water jets[J].Journal of China Coal Society,2017,42(10):2609-2615.
[2] TAO D,LI B,JOHNSON S,et al.A flotation study of refuse pond coal slurry[J].Fuel Processing Technology,2002,76(3):201-210.
[3] 罗成,何亚群,卜祥宁,等.窄粒级煤泥浮选经典动力学模型的改进[J].中国矿业大学学报,2015,44(3):477-482.LUO Cheng,HE Yaqun,BU Xiangning,et al.An improved classic flotation kinetic model of narrow size slime[J].Journal of China University of Mining & Technology,2015,44(3):477-482.
[4] 刘承帅,陈东,陈飞飞,等.自吸气浮选机设计参数对浮选流体动力学性能的影响[J].金属矿山,2018,47(2):160-163.LIU Chengshuai,CHEN Dong,CHEN Feifei,et al.Influence of self-aerated flotation design parameter on hydrodynamics performance of flotation cell[J].Metal Mine,2018,47(2):160-163.
[5] YU Yuexian,MA Liqiang,CAO Mingli,et al.Slime coatings in froth flotation:A review[J].Minerals Engineering,2017,114:26-36.
[6] 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].机械工程学报,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.
[7] 杨福新.机械搅拌式浮选机能耗分析[J].有色金属(选矿部分),2004(5):31-36.YANG Fuxin.Analyse of energy consumption in agitation flotation machine[J].Nonferrous Metals(Mineral Processing Section),2004(5):31-36.
[8] 沈政昌.浮选机发展历史及发展趋势[J].有色金属(选矿部分),2011(增1):34-46.SHEN Zhengchang.Development history and trend of flotation cell[J].Nonferrous Metals(Mineral Processing Section),2011(Sup1):34-46.
[9] 牟联胜.采用高效射流浮选机从某尾矿中回收硫的工业实验[J].矿产综合利用,2010(3):46-48.MU Liansheng.Adopt high-efficiency jet flotation machine from tailings recovery of sulfur in the industrial test[J].Multipurpose Utilization of Mineral Resources,2010(3):46-48.
[10] XIE Yongfang,CAO Binfang,HE Yongping,et al.Reagent dosages control based on bubble size characteristics for flotation process[J].IET Control Theory and Applications,2016,10(12):1404-1411.
[11] 王超.环空射流吸气搅拌装置结构优化及气泡生成机理研究[D].淮南:安徽理工大学,2016:37-47.WANG Chao.The structure optimization and bubble production mechanism study of annular jet suction mixing device[D].Huainan:Anhui University of Science & Technology,2016:37-47.
[12] 周勃,吕洁,王毅,等.具有环形射流的吸气流动的性能分析[J].沈阳工业大学学报,2004,26(5):576-578.ZHOU Bo,Lü Jie,WANG Yi,et al.Study and analysis on inhalational flowing performance with annular ejection[J].Journal of Shenyang University of Technology,2004,26(5):576-578.
[13] 林豹.射流作用下吸气流动临界射流速度的实验确定[J].沈阳建筑工程学院学报,1993,9(1):7-13.LIN Bao.Experimental dedermination for the critical injection velocity of exhaustion flow under jet interaction[J].Journal of Shenyang Architectural and Civil Engineering Institute,1993,9(1):7-13.
[14] 徐志强,皇甫京华,曾鸣,等.射流浮选柱气泡发生器及其充气性能的研究[J].中国矿业大学学报,2003,32(6):615-618.XU Zhiqiang,HUANGFU Jinghua,ZENG Ming,et al.Research bubble generator of jet flotation column and its aerating performance[J].Journal of China University of Mining & Technology,2003,32(6):615-618.
[15] 刘炯天,王永田.自吸式微泡发生器充气性能研究[J].中国矿业大学学报,1998,27(1):27-30.LIU Jiongtian,WANG Yongtian.Study of aeration performance of self-absorption micro-bubble generator[J].Journal of China University of Mining & Technology,1998,27(1):27-30.
[16] 费之奎,朱金波,朱宏政,等.喷射-搅拌耦合式浮选装置吸气机理研究[J].煤炭学报,2017,42(增2):472-478.FEI Zhikui,ZHU Jinbo,ZHU Hongzheng,et al.Air-suction mechanism of jet-stirring coupling flotation device[J].Journal of China Coal Society,2017,42(Sup2):472-478.
[17] 段旭琴,宋猛,王晓宁,等.喷射式浮选机空气反应器数值计算及实验验证[J].煤炭学报,2015,40(增1):259-264.DUAN Xuqin,SONG Meng,WANG Xiaoning,et al.Numerical simulation of air-pulp mixer of jet flotation machine and experimental verification[J].Journal of China Coal Society,2015,40(Sup1):259-264.
[18] 朱金波,韩有理,费之奎,等.喷射-搅拌耦合式煤泥浮选装置研究[J].洁净煤技术,2018,24(1):69-73.ZHU Jinbo,HAN Youli,FEI Zhikui,et al.Research on jet-stirring coupling coal slime flotation device[J].Clean Coal Technology,2018,24(1):69-73.
[19] 杨友胜,张建平,聂松林.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,ZHANG Jianping,NIE Songlin.Energy loss of nozzles in water jet system[J].Journal of Mechanical Engineering,2013,49(2):139-145.
[20] 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.
[21] 卢义玉,刘勇,夏彬伟,等.石门揭煤钻孔布置优化分析及应用[J].煤炭学报,2011,36(2):283-287.LU Yiyu,LIU Yong,XIA Binwei,et al.The novel technology of drilling arrangement of rock cross-cut coal uncovering basing on theoretical analysis[J].Journal of China Coal Society,2011,36(2):283-287.
[22] 陆宏圻.喷射技术理论及应用[M].武汉:武汉大学出版社,2004:16-53.LU Hongqi.Theory and application of jet technology[M].Wuhan:Wuhan University Press,2004:16-53.
[23] 刘勇,陈长江,刘笑天,等.高压水射流破岩能量耗散与释放机制[J].煤炭学报,2017,42(10):2609-2615.LIU Yong,CHEN Changjiang,LIU Xiaotian,et al.Mechanism on energy dissipation and release of rock breakage with high pressure water jets[J].Journal of China Coal Society,2017,42(10):2609-2615.
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