难选尾煤磨矿分级浮选提质实验研究
|
摘要
实验使用磨球直径为8mm的搅拌磨对尾煤进行磨矿,磨矿时间为4min。将磨矿后煤泥经Φ50mm小锥角旋流器进行分级,脱除其中硬度大、灰分高的粗颗粒。结果表明:分级后的底流产率为3.26%(质量分数,下同),灰分为60.46%;尾煤分级后,将Φ50mm旋流器溢流产物进行浮选,浮选实验整体采用一次粗选和二次精选的实验流程进行提质研究;DLVO理论研究表明,能量输入是细泥罩盖污染的重要因素;能量扰动实验结果表明,二次精选有效实现了精煤回收和黏土矿物富集,可燃体回收率最高为21.82%,灰分最低达到9.63%,尾煤灰分最高为87.26%。
A stirring mill with 8 mm ball was used to grind the coal,and the grinding time was 4 min in the experiment.The grinded coal slime was classified by 50 mm small cone angle cyclone to remove the coarse particles with high hardness and ash mass fraction.The results show that the underflow rate is 3.26% and the ash mass fraction is 60.46%.After tailings classification,the overflow product of 50 mm cyclone is to be floated.The whole flotation test flow is one roughing stage and two cleaning stages to upgrade the quality of flotation.The DLVO theory study shows that energy input is an important factor affecting the mud cover.After energy disturbance test,the results show that secondary cleaning can effectively actualize the recovery of clean coal and enrichment of clay minerals.The highest recovery rate of combustible matter is 21.82%,the lowest ash mass fraction is 9.63%,and the highest ash mass fraction of tailings is 87.26%.
A stirring mill with 8 mm ball was used to grind the coal,and the grinding time was 4 min in the experiment.The grinded coal slime was classified by 50 mm small cone angle cyclone to remove the coarse particles with high hardness and ash mass fraction.The results show that the underflow rate is 3.26% and the ash mass fraction is 60.46%.After tailings classification,the overflow product of 50 mm cyclone is to be floated.The whole flotation test flow is one roughing stage and two cleaning stages to upgrade the quality of flotation.The DLVO theory study shows that energy input is an important factor affecting the mud cover.After energy disturbance test,the results show that secondary cleaning can effectively actualize the recovery of clean coal and enrichment of clay minerals.The highest recovery rate of combustible matter is 21.82%,the lowest ash mass fraction is 9.63%,and the highest ash mass fraction of tailings is 87.26%.
引文
[1]谢和平,刘虹,吴刚.我国GDP煤炭依赖指数概念的建立与评价分析[J].四川大学学报(哲学社会科学版),2012(5):89-94.XIE Heping,LIU Hong,WU Gang.An Evaluation of China’s Economic Dependence on Coal Consumption[J].Journal of Sichuan University(Social Science Edition),2012(5):89-94.
[2]谢和平,刘虹,吴刚.经济对煤炭的依赖与煤炭对经济的贡献分析[J].中国矿业大学报(社会科学版),2012,14(3):1-6.XIE Heping,LIU Hong,WU Gang.A Quantitative Analysis of Dependent Index and Contribution Rate Between China’s Economic and Coal Development[J].Journal of China University of Mining and Technology(Social Sciences),2012,14(3):1-6.
[3]谢和平,刘虹,吴刚.煤炭对国民经济发展贡献的定量分析[J].中国能源,2012,34(4):5-9.XIE Heping,LIU Hong,WU Gang.Quantitative Analysis of the Contribution of Coal to the Development of National Economy[J].Energy of China,2012,34(4):5-9.
[4]谢和平.煤炭科学开采与技术变革[R].中国工程院国际工程科技大会报告,2014.XIE Heping.Scientific Coal Mining and Technological Change[R].Report of International Engineering Science and Technology Conference of China Academy of Engineering,2014.
[5]谢和平.煤炭科技之探索和展望[R].煤炭工业十三五科技发展规划编制会议报告,2015.XIE Heping.Exploration and Prospect of Coal Science and Technology[R].Preparation Report of the 13th Five-year Plan of Science and Technology Development of Coal Industry,2015.
[6]吴尧萍.中国“十二五”及2020年碳减排目标实现模式研究[D].南京:南京大学,2014.WU Yaoping.A Study on the Implementation Modes of the Carbon Emissions Reduction Target in the“12th Five Year”and2020[D].Nanjing:Nanjing University,2014.
[7]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 and Technology,2015,44(3):477-482.
[8]XU Zhenghe,LIU Jianjun,CHOANG J W,et al.Electrokinetic Study of Clay Interactions with Coal in Flotation[J].International Journal of Mineral Processing,2003,68(1/2/3/4):183-196.
[9]倪超.柱浮选精煤细泥污染形成机理及抑制研究[D].徐州:中国矿业大学,2016.NI Chao.Understanding and Inhibition of Fine Slime Contamination to Clean Coal in Column Flotation[D].Xuzhou:China Mining University,2016.
[10]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahui,XING Yaowen,LI Chenwei,et al.Clay Coating and Its Behavior Regulation in Fine Coal Flotation[J].Coal Science and Technology,2016,44(6):175-181.
[11]桂夏辉,程敢,刘炯天,等.异质细泥在煤泥浮选中的过程特征[J].煤炭学报,2012,37(2):301-309.GUI Xiahui,CHENG Gan,LIU Jiongtian,et al.Process Characteristics of Heterogeneous Fine Mud in the Coal Flotation[J].Journal of China Coal Society,2012,37(2):301-309.
[12]ZHANG Zhijun,LIU Jiongtian,XU Zhiqiang,et al.Effects of Clay and Calcium Ions on Coal Flotation[J].International Journal of Mining Science and Technology,2013,23(5):689-692.
[13]OATS W J,OZDEMIR O,NGUYEN A V.Effect of Mechanical and Chemical Clay Removals by Hydrocyclone and Dispersants on Coal Flotation[J].Minerals Engineering,2010,23(5):413-419.
[14]于跃先,马力强,张仲玲,等.煤泥浮选过程中的细泥夹带与罩盖机理[J].煤炭学报,2015,40(3):652-658.YU Yuexian,MA Liqiang,ZHANG Zhongling,et al.Mechanism of Entrainment and Slime Coating on Coal Flotation[J].Journal of Coal Science,2015,40(3):652-658.
[15]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahu,XIN Yaowen,LI Chenwei,et al.Clay Coating and Its Behavior Regulation in Fine Coal Flotation[J].Coal Science and Technology,2016,44(6):175-181.
[16]王宝俊,李敏,赵清艳,等.煤的表面电位与表面官能团间的关系[J].化工学报,2004,55(8):1329-1334.WANG Baojun,LI Min,ZHAO Qingyan,et al.Relationship Between Surface Potential and Functional Groups of Coal[J].Journal of Chemical Industry and Engineering(China),2004,55(8):1329-1334.
[17]吉登高,蔡阳辉,彭素琴,等.提高煤泥浮选捕收剂性能的实验研究[J].洁净煤技术,2012,18(2):6-9.JI Denggao,CAI Yanghui,PENG Suqin,et al.Experimental Research on Improvement of Coal Flotation Collectors[J].Clean Coal Technology,2012,18(2):6-9.
[18]刘晓文,胡岳华,黄圣生,等.高岭土的化学成分与表面电性研究[J].矿物学报,2001,21(3):443-447.LIU Xiaowen,HU Yuehua,HUANG Shengsheng,et al.Chemical Composition and Surface Property of Kaolins[J].Aata Mineralogica Sinica,2001,21(3):443-447.
[2]谢和平,刘虹,吴刚.经济对煤炭的依赖与煤炭对经济的贡献分析[J].中国矿业大学报(社会科学版),2012,14(3):1-6.XIE Heping,LIU Hong,WU Gang.A Quantitative Analysis of Dependent Index and Contribution Rate Between China’s Economic and Coal Development[J].Journal of China University of Mining and Technology(Social Sciences),2012,14(3):1-6.
[3]谢和平,刘虹,吴刚.煤炭对国民经济发展贡献的定量分析[J].中国能源,2012,34(4):5-9.XIE Heping,LIU Hong,WU Gang.Quantitative Analysis of the Contribution of Coal to the Development of National Economy[J].Energy of China,2012,34(4):5-9.
[4]谢和平.煤炭科学开采与技术变革[R].中国工程院国际工程科技大会报告,2014.XIE Heping.Scientific Coal Mining and Technological Change[R].Report of International Engineering Science and Technology Conference of China Academy of Engineering,2014.
[5]谢和平.煤炭科技之探索和展望[R].煤炭工业十三五科技发展规划编制会议报告,2015.XIE Heping.Exploration and Prospect of Coal Science and Technology[R].Preparation Report of the 13th Five-year Plan of Science and Technology Development of Coal Industry,2015.
[6]吴尧萍.中国“十二五”及2020年碳减排目标实现模式研究[D].南京:南京大学,2014.WU Yaoping.A Study on the Implementation Modes of the Carbon Emissions Reduction Target in the“12th Five Year”and2020[D].Nanjing:Nanjing University,2014.
[7]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 and Technology,2015,44(3):477-482.
[8]XU Zhenghe,LIU Jianjun,CHOANG J W,et al.Electrokinetic Study of Clay Interactions with Coal in Flotation[J].International Journal of Mineral Processing,2003,68(1/2/3/4):183-196.
[9]倪超.柱浮选精煤细泥污染形成机理及抑制研究[D].徐州:中国矿业大学,2016.NI Chao.Understanding and Inhibition of Fine Slime Contamination to Clean Coal in Column Flotation[D].Xuzhou:China Mining University,2016.
[10]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahui,XING Yaowen,LI Chenwei,et al.Clay Coating and Its Behavior Regulation in Fine Coal Flotation[J].Coal Science and Technology,2016,44(6):175-181.
[11]桂夏辉,程敢,刘炯天,等.异质细泥在煤泥浮选中的过程特征[J].煤炭学报,2012,37(2):301-309.GUI Xiahui,CHENG Gan,LIU Jiongtian,et al.Process Characteristics of Heterogeneous Fine Mud in the Coal Flotation[J].Journal of China Coal Society,2012,37(2):301-309.
[12]ZHANG Zhijun,LIU Jiongtian,XU Zhiqiang,et al.Effects of Clay and Calcium Ions on Coal Flotation[J].International Journal of Mining Science and Technology,2013,23(5):689-692.
[13]OATS W J,OZDEMIR O,NGUYEN A V.Effect of Mechanical and Chemical Clay Removals by Hydrocyclone and Dispersants on Coal Flotation[J].Minerals Engineering,2010,23(5):413-419.
[14]于跃先,马力强,张仲玲,等.煤泥浮选过程中的细泥夹带与罩盖机理[J].煤炭学报,2015,40(3):652-658.YU Yuexian,MA Liqiang,ZHANG Zhongling,et al.Mechanism of Entrainment and Slime Coating on Coal Flotation[J].Journal of Coal Science,2015,40(3):652-658.
[15]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahu,XIN Yaowen,LI Chenwei,et al.Clay Coating and Its Behavior Regulation in Fine Coal Flotation[J].Coal Science and Technology,2016,44(6):175-181.
[16]王宝俊,李敏,赵清艳,等.煤的表面电位与表面官能团间的关系[J].化工学报,2004,55(8):1329-1334.WANG Baojun,LI Min,ZHAO Qingyan,et al.Relationship Between Surface Potential and Functional Groups of Coal[J].Journal of Chemical Industry and Engineering(China),2004,55(8):1329-1334.
[17]吉登高,蔡阳辉,彭素琴,等.提高煤泥浮选捕收剂性能的实验研究[J].洁净煤技术,2012,18(2):6-9.JI Denggao,CAI Yanghui,PENG Suqin,et al.Experimental Research on Improvement of Coal Flotation Collectors[J].Clean Coal Technology,2012,18(2):6-9.
[18]刘晓文,胡岳华,黄圣生,等.高岭土的化学成分与表面电性研究[J].矿物学报,2001,21(3):443-447.LIU Xiaowen,HU Yuehua,HUANG Shengsheng,et al.Chemical Composition and Surface Property of Kaolins[J].Aata Mineralogica Sinica,2001,21(3):443-447.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |