超声波同步处理强化煤泥浮选的试验研究
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摘要
为探究超声波对细粒煤泥浮选过程的影响,自制超声浮选装置进行浮选试验。使用激光粒度仪、扫描电子显微镜,分析超声波对浮选产品粒度组成和表面特性的影响;利用紫外分光光度计测定矿浆剩余捕收剂量,计算超声波对捕收剂吸附的影响。试验结果表明:在浮选过程加入超声波后,可燃体回收率、浮选完善指数均有提升;100 kHz超声波作用时,可燃体回收率比常规浮选提高10%,改进效果最佳;在同等浮选条件下,超声浮选比常规浮选所需浮选药剂用量低19%～35%。超声作用能够去除煤粒表面吸附细泥,促使浮选气泡团聚,形成气絮团,提高大于0.045 mm粒级的浮选效率。
In order to investigate the effect of ultrasonic simultaneous treatment on flotation of fine coal slimes,a new ultrasonic flotation device was made to conduct floatation experiment.The particle size distribution of clean coal was measured by Laser Particle Sizer,and the influence of ultrasound on surface characteristics of clean coal particles was investigated by SEM.The influence of ultrasound on adsorption of collector was investigated by UV spectrophotometer.The result revealed that combustible recovery and perfect index flotation of floated products increased by using ultrasonic treatment with same reagent dosages.The best flotation effect can be achieved with 100 kHz ultrasound,and the combustible recovery rate is 10% higher than that of conventional flotation.Ultrasonic floatation need 19%～35% less reagent dosages than conventional floatation under the same flotation condition.Ultrasonic can remove the fine mud adsorbed on the surface of coal particles,promote bubble agglomeration in the pulp,form air flocculation,and improve the flotation efficiency of particles with size of +0.045 mm.
In order to investigate the effect of ultrasonic simultaneous treatment on flotation of fine coal slimes,a new ultrasonic flotation device was made to conduct floatation experiment.The particle size distribution of clean coal was measured by Laser Particle Sizer,and the influence of ultrasound on surface characteristics of clean coal particles was investigated by SEM.The influence of ultrasound on adsorption of collector was investigated by UV spectrophotometer.The result revealed that combustible recovery and perfect index flotation of floated products increased by using ultrasonic treatment with same reagent dosages.The best flotation effect can be achieved with 100 kHz ultrasound,and the combustible recovery rate is 10% higher than that of conventional flotation.Ultrasonic floatation need 19%～35% less reagent dosages than conventional floatation under the same flotation condition.Ultrasonic can remove the fine mud adsorbed on the surface of coal particles,promote bubble agglomeration in the pulp,form air flocculation,and improve the flotation efficiency of particles with size of +0.045 mm.
引文
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[19] 王卫东,张楠.超声场中浮选泡沫粒度变化规律研究[J].矿业科学学报,2018,3(1):84-90.Wang Weidong,Zhang Nan.Flotation bubble size distribution rules with ultrasonic radiation[J].Journal of Mining Science and Technology,2018,3(1):84-90.
[20] Celik M S.Eeffet of ultrasonic treatment on the floatability of coal and galena[J].Separation Science and Technology,1989,24(14):1159-1166.
[21] 马奭文.超声空化气泡动力学行为研究[D].西安:陕西师范大学,2013.
[22] 王萍辉,方湄.超声空化清洗机理的研究[J].水力水电科技进展,2004,24(1):32-35.Wang Pinghui,Fang Mei.Research on ultrasonic cavitation cleaning mechanism[J].Advances in Science and Technology of Water Resources,2004,24(1):32-35
[23] J·赖亚.泡沫浮选表面化学[M].何伯泉,陈祥涌,译.北京:冶金工业出版社,1987:545.
[24] 唐超.超声预处理对煤泥浮选过程的强化作用研究[D].徐州:中国矿业大学,2014.
[25] 黄波.界面分选技术[M].北京:煤炭工业出版社,2008:141.
[26] 佘锦锦.超声及表面活性剂对柴油微乳化的影响[D].南京:南京工业大学,2005.
[2] 马力强,韦鲁滨,江兴华,等.调浆剪切强度对煤泥浮选的影响[J].煤炭学报,2013,38(1):140-144.Ma Liqiang,Wei Lubin,Jiang Xinghua,et al.Effects of shearing strength in slurry conditioning on coal slime flotation[J].Journal of China Coal Society,2013,38(1):140-144.
[3] Jia R H,Harris G H,Fuerstenau D W.An improved class of universal collectors for the flotation of oxidized and/or low-rank coal[J].International Journal of Mineral Processing,2000,58:99-118.
[4] 李志远,谢广元,梁龙,等.入料组成对细粒煤泥浮选的影响[J].煤炭技术,2015,34(7):318-320.Li Zhiyuan,Xie Guangyuan,Liang Long,et al.Influence of flotation feed composition on fine coal flotation.[J].Coal Technology,2015,34(7):318-320.
[5] 于跃先,马力强,张志军,等.高灰煤泥难选原因分析及分选技术探讨[J].煤炭工程,2016,48(7):118-121.Yu Yuexian,Ma Liqiang,Zhang Zhijun,et al.Cause analysis for separation difficulty of high ash fine coal and discussion on the separation techniques[J].Coal Engineering,2016,48(7):118-121.
[6] 瞿望,谢广元,彭耀丽,等.脱泥浮选与精煤精选工艺试验研究[J].煤炭工程,2014,46(3):97-99.Qu Wang,Xie Guangyuan,Peng Yaoli,et al.Experimental study on deslime-flotation process and the roughing-cleaning process.[J].Coal Engineering,2014,46(3):97-99.
[7] 佟顺增,夏灵勇,桂夏辉,等.高灰难选煤泥分级浮选试验研究[J].选煤技术,2011(5):18-22.Tong Shunzeng,Xia Lingyong,Gui Xiahui,et al.Experimental study on grading flotation of high-gray difficult coal[J].Coal Preparation Technology,2011(5):18-22.
[8] 桂夏辉,刘炯天,程敢,等.能量输入对煤泥浮选过程的影响[J].中南大学学报:自然科学版,2012,43(6):2075-2083.Gui Xiahui,Liu Jiongtian,Cheng Gan,et al.Effect of energy input on coal flotation process[J].Journal of Central South University:Science and Technology,2012,43(6):2075-2083.
[9] 宋国阳,刘杰,闫思勤,等.能量强度变化对不同粒级煤泥浮选影响的理论和试验研究[J].矿业科学学报,2018,3(1):91-98.Song Guoyang,Liu Jie,Yan Siqin,et al.Theoretical and experimental study on the effects of energy intensity on the flotation of different size coal slime[J].Journal of Mining Science and Technology,2018,3(1):91-98.
[10] 荀海鑫.超声强化稀缺难浮煤泥浮选研究[D].哈尔滨:黑龙江科技学院,2009.
[11] 康文泽,王慧,陈俊涛,等.煤泥超声浮选的试验研究[J].洁净煤技术,2005(3):35-37.Kang Wenze,Wang Hui,Chen Juntao,et al.Experimental study of slime ultrasonic flotation[J].Clean Coal Technology,2005(3):35-37.
[12] 史英祥,程宏志.利用超声波强化煤泥浮选效果的研究[J].选煤技术,2007(2):8-10,72.Shi Yingxiang,Cheng Hongzhi.Research on enhancement of coal slime flotation performance by use of ultrasonic wave[J].Coal Preparation Technology,2007(2):8-10,72.
[13] 康文泽,吕玉庭.超声波处理对煤泥特性的影响研究[J].中国矿业大学学报,2006,35(6):783-786,798.Kang Wenze,Lü Yuting.Effect of ultrasonic treatment on slime characteristics[J].Journal of China University of Mining & Technology,2006,35(6):783-786,798.
[14] 康文泽,荀海鑫,李明明.超声波预处理对稀缺难浮煤浮选的作用[J].中国矿业大学学报,2013,42(4):625-630.Kang Wenze,Xun Haixin,Li Mingming.The effect of ultrasonic pretreatment on the flotation of scarce difficult-to-float coals[J].Journal of China University of Mining & Technology,2013,42(4):625-630.
[15] Kang Wenze,Xun Haixin,Chen Juntao.Study of enhanced fine coal de-sulphurization and de-ashing by ultrasonic flotation[J].Journal of China University of Mining & Technology,2007,17(3):358-362.
[16] Kang Wenze,Xun Haixin,Hu Jun.Study of the effect of ultrasonic treatment on the surface composition and the flotation performance of high-sulfur coal[J].Fuel Processing Technology,2008,89(12):1337-1344.
[17] Ozkan S G.Effects of simultaneous ultrasonic treatment on flotation of hard coal slimes[J].Fuel,2012,93(1):576-580.
[18] Ozkan S G.Further investigations on simultaneous ultrasonic coal flotation[J].Minerals,2017,7(10):177.
[19] 王卫东,张楠.超声场中浮选泡沫粒度变化规律研究[J].矿业科学学报,2018,3(1):84-90.Wang Weidong,Zhang Nan.Flotation bubble size distribution rules with ultrasonic radiation[J].Journal of Mining Science and Technology,2018,3(1):84-90.
[20] Celik M S.Eeffet of ultrasonic treatment on the floatability of coal and galena[J].Separation Science and Technology,1989,24(14):1159-1166.
[21] 马奭文.超声空化气泡动力学行为研究[D].西安:陕西师范大学,2013.
[22] 王萍辉,方湄.超声空化清洗机理的研究[J].水力水电科技进展,2004,24(1):32-35.Wang Pinghui,Fang Mei.Research on ultrasonic cavitation cleaning mechanism[J].Advances in Science and Technology of Water Resources,2004,24(1):32-35
[23] J·赖亚.泡沫浮选表面化学[M].何伯泉,陈祥涌,译.北京:冶金工业出版社,1987:545.
[24] 唐超.超声预处理对煤泥浮选过程的强化作用研究[D].徐州:中国矿业大学,2014.
[25] 黄波.界面分选技术[M].北京:煤炭工业出版社,2008:141.
[26] 佘锦锦.超声及表面活性剂对柴油微乳化的影响[D].南京:南京工业大学,2005.