超声波辅助粉煤灰浮选脱碳
|
摘要
为了解决粉煤灰含碳高无法充分利用的问题,借助超声波对粉煤灰进行浮选脱碳。先用单因素试验,研究主要因素对粉煤灰脱碳的影响,再进行"一粗四精一扫"的全浮选工艺流程试验。结果表明:单因素试验矿浆质量浓度106.7 g/L、2号油用量976.5 g/t、煤油用量441.9 g/t、超声作用2min、浮选7 min时,浮选效果最好,获得精矿的烧失率和回收率分别为59.65%和68.41%,表明超声波能有效提升粉煤灰的浮选效果。"一粗四精一扫"试验获得精碳烧失率和回收率分别为75.96%和66.70%,实现了粉煤灰的有效回收。
In order to solve the high carbon content problem of fly ash,the flotation decarburization test on fly ash was carried out with the aid of ultrasonic.The effect of the main factors on the decarbonization of fly ash was studied by a single factor experiment,and then the full flotation process test of " one coarse four fine one sweeping" was conducted.The results show that in single factor experiment,when the pulp concentration is 106.7 g/L,No.2 oil dosage is 976.5 g/t,kerosene dosage is 441.9 g/t,ultrasonic treatment time is 2 min,flotation time is7 min,the flotation effect is the best,the ignition loss and recovery rate of concentrate is 59.65% and 68.41%,respectively.Ultrasonic can effectively improve the flotation effect of fly ash. " One coarse four fine one sweeping" test obtains fine carbon,the ignition loss and recovery rate are 75.96% and 66.70%,respectively,achieving the effective recovery of fly ash.
In order to solve the high carbon content problem of fly ash,the flotation decarburization test on fly ash was carried out with the aid of ultrasonic.The effect of the main factors on the decarbonization of fly ash was studied by a single factor experiment,and then the full flotation process test of " one coarse four fine one sweeping" was conducted.The results show that in single factor experiment,when the pulp concentration is 106.7 g/L,No.2 oil dosage is 976.5 g/t,kerosene dosage is 441.9 g/t,ultrasonic treatment time is 2 min,flotation time is7 min,the flotation effect is the best,the ignition loss and recovery rate of concentrate is 59.65% and 68.41%,respectively.Ultrasonic can effectively improve the flotation effect of fly ash. " One coarse four fine one sweeping" test obtains fine carbon,the ignition loss and recovery rate are 75.96% and 66.70%,respectively,achieving the effective recovery of fly ash.
引文
[1]缪应菊,敖显字,胡庆林,等.超声辅助改性粉煤灰对废水中氨氮去除率的影响[J].湿法冶金,2016,35(4):349-352.MIAO Yingju,AO Xianzi,HU Qinglin,et al.Influence of ultrasound-assisted modified fly ash on removeal of ammonia nitrogen in wastewater[J].Hydrometallurgy of China,2016,35(4):349-352.
[2]冉进财,李国胜,曹亦俊.无机盐阳离子对粉煤灰浮选泡沫稳定性的影响研究[J].煤炭学报,2015,40(3):646-651.RAN Jincai,LI Guosheng,CAO Yijun,et al.Influence of inorganic salt on flotation froth stability of coal fly ash[J].Journal of China Coal Society,2015,40(3):646-651.
[3]桂夏辉,刘炯天,陶秀祥,等.难浮煤泥浮选速率试验研究[J].煤炭学报,2011,36(11):1895-1900.GUI Xiahui,LIU Jiongtian,TAO Xiuxiang,et al.Studies on flotation rate of a hard-to-float fine coal[J].Journal of China Coal Society,2011,36(11):1895-1900.
[4]TAO Y,LIU J,YU S,et al.Picobubble enhanced fine coal flotation[J].Separation Science and Technology,2006,41(16):3597-3607.
[5]杨旸.超声处理西南地区煤泥的浮选效果研究[J].煤炭技术,2017,36(9):315-317.YANG Yang.Study on flotation effect of slime in southwest area by ultrasonic treatment[J].Coal Technology,2017,36(9):315-317.
[6]欧阳嘉骏,陈艺锋,王宇菲.超声波强化铝土矿浮选脱硫研究[J].中国矿山工程,2015,44(2):15-18.
[7]徐一雯,蒋建国,颜枫,等.超声波对粉煤灰提硅的强化效果研究[J].中国环境科学,2017,37(7):2656-2661.XU Yiwen,JIANG Jianguo,YAN Feng,et al.Enhancement effects of ultrasound on the extraction efficiency of silicon from coal fly ash[J].China Environmental Science,2017,37(7):2656-2661.
[8]陈东,梁殿印,韩登峰,等.超声波对常用浮选药剂分散乳化效果研究[J].有色金属(选矿部分),2011,13(3):50-53.CHEN Dong,LIANG Dianyin,HAN Dengfeng,et al.Effect of ultrasonic treatment on the emulsion dispersion of common flotation reagent such as xanthate,aerofloat,calcium hydroxide and oleic acid[J].Nonferrous Metals(Mineral Processing Section),2011,13(3):50-53.
[9]李琳,刘炯天,王运来,等.阴-非离子表面活性剂微乳捕收剂的制备及应用[J].煤炭学报,2014,39(11):2315-2320.LI Lin,LIU Jiongtian,WANG Yunlai,et al.Preparation and application of anionic-nonionic surfactant microemulsified collector[J].Journal of China Coal Society,2014,39(11):2315-2320.
[10]CHEN Z X,DENG S P,LI X K.Micellization and synergistic interaction of binary surfactant mixtures based on sodium nonylphenol polyoxyethylene ether sulfate[J].Journal of Colloid and Interface Science,2008,318(2):389-396.
[11]勒特马瑟C,崔洪山,肖力子.应用超声波强化泡沫浮选[J].国外金属矿选矿,2002,39(10):21-25.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.煤的工业分析方法:GB/T 212—2008[S].北京:中国标准出版社,2008.
[2]冉进财,李国胜,曹亦俊.无机盐阳离子对粉煤灰浮选泡沫稳定性的影响研究[J].煤炭学报,2015,40(3):646-651.RAN Jincai,LI Guosheng,CAO Yijun,et al.Influence of inorganic salt on flotation froth stability of coal fly ash[J].Journal of China Coal Society,2015,40(3):646-651.
[3]桂夏辉,刘炯天,陶秀祥,等.难浮煤泥浮选速率试验研究[J].煤炭学报,2011,36(11):1895-1900.GUI Xiahui,LIU Jiongtian,TAO Xiuxiang,et al.Studies on flotation rate of a hard-to-float fine coal[J].Journal of China Coal Society,2011,36(11):1895-1900.
[4]TAO Y,LIU J,YU S,et al.Picobubble enhanced fine coal flotation[J].Separation Science and Technology,2006,41(16):3597-3607.
[5]杨旸.超声处理西南地区煤泥的浮选效果研究[J].煤炭技术,2017,36(9):315-317.YANG Yang.Study on flotation effect of slime in southwest area by ultrasonic treatment[J].Coal Technology,2017,36(9):315-317.
[6]欧阳嘉骏,陈艺锋,王宇菲.超声波强化铝土矿浮选脱硫研究[J].中国矿山工程,2015,44(2):15-18.
[7]徐一雯,蒋建国,颜枫,等.超声波对粉煤灰提硅的强化效果研究[J].中国环境科学,2017,37(7):2656-2661.XU Yiwen,JIANG Jianguo,YAN Feng,et al.Enhancement effects of ultrasound on the extraction efficiency of silicon from coal fly ash[J].China Environmental Science,2017,37(7):2656-2661.
[8]陈东,梁殿印,韩登峰,等.超声波对常用浮选药剂分散乳化效果研究[J].有色金属(选矿部分),2011,13(3):50-53.CHEN Dong,LIANG Dianyin,HAN Dengfeng,et al.Effect of ultrasonic treatment on the emulsion dispersion of common flotation reagent such as xanthate,aerofloat,calcium hydroxide and oleic acid[J].Nonferrous Metals(Mineral Processing Section),2011,13(3):50-53.
[9]李琳,刘炯天,王运来,等.阴-非离子表面活性剂微乳捕收剂的制备及应用[J].煤炭学报,2014,39(11):2315-2320.LI Lin,LIU Jiongtian,WANG Yunlai,et al.Preparation and application of anionic-nonionic surfactant microemulsified collector[J].Journal of China Coal Society,2014,39(11):2315-2320.
[10]CHEN Z X,DENG S P,LI X K.Micellization and synergistic interaction of binary surfactant mixtures based on sodium nonylphenol polyoxyethylene ether sulfate[J].Journal of Colloid and Interface Science,2008,318(2):389-396.
[11]勒特马瑟C,崔洪山,肖力子.应用超声波强化泡沫浮选[J].国外金属矿选矿,2002,39(10):21-25.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.煤的工业分析方法:GB/T 212—2008[S].北京:中国标准出版社,2008.