三产品干扰床粗煤泥分选机及其数学模型的研究
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摘要
粗煤泥干扰床分选机作为一种新型的细粒煤分选设备，其应用越来越广泛。本文利用流化理论分析了干扰床中颗粒的流化状态，解释了干扰床的分选机理，在对传统干扰床进行单因素试验、正交试验的基础上，研制了三产品干扰床粗煤泥分选机。通过试验发现新型三产品干扰床对难选煤泥分选效果远好于传统干扰床分选机，对于易选煤可获得比传统干扰床更高的数量效率，对于难选煤可获得更低的精煤灰分。基于干扰沉降速度经验公式和有限差分法构建了传统干扰床分选的数质量平衡模型，并进一步构建了三产品干扰床的数学模型，为三产品干扰床分选机的深入研究和工业化奠定了良好基础。
As new equipment for fine coal separation, the application of TBS for coarse coal slime hasbeen more and more extensive. The fluidization statement of the particles in TBS has beenanalyzed using fluidization theory. Separation mechanism of TBS was explained. Based on thesingle factor and orthogonal experiments of traditional TBS, a new three-product TBS wasdeveloped. Single factor experiments of new machine were conducted. It was shown thatperformance of the new machine is better than traditional machine. Higher organic efficiency wasobtained for coal which is easy to process, and lower ash content of clean coal was obtained forcoal which is hard to process. A population balanced model has been developed to represent theseparation in a traditional TBS based on empirical formula for hinded-settling velocity andpopulation balance. Furthermore, a mathematical model of three-product TBS was developed.Validation of model using experimental data was conducted. The foundation for further researchand industrialization of the new equipment was established by mathematical model study.
As new equipment for fine coal separation, the application of TBS for coarse coal slime hasbeen more and more extensive. The fluidization statement of the particles in TBS has beenanalyzed using fluidization theory. Separation mechanism of TBS was explained. Based on thesingle factor and orthogonal experiments of traditional TBS, a new three-product TBS wasdeveloped. Single factor experiments of new machine were conducted. It was shown thatperformance of the new machine is better than traditional machine. Higher organic efficiency wasobtained for coal which is easy to process, and lower ash content of clean coal was obtained forcoal which is hard to process. A population balanced model has been developed to represent theseparation in a traditional TBS based on empirical formula for hinded-settling velocity andpopulation balance. Furthermore, a mathematical model of three-product TBS was developed.Validation of model using experimental data was conducted. The foundation for further researchand industrialization of the new equipment was established by mathematical model study.
引文
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3.濮洪九.中国煤炭可持续开发利用及环境对策研究[M].徐州:中国矿业大学出版社,2010:1-7.
4.陈清如,中国洁净煤战略思考.黑龙江科技学院学报,2004(05)
5.陈清如,发展洁净煤技术推动节能减排.中国高校科技与产业化,2008(03)
6.中华人民共和国科学技术部，国科发计〔2012〕196号，洁净煤技术科技发展“十二五”专项规划，北京：2012
7.刘佳喜等.选煤工业现状及发展战略.煤炭科学技术，2011.5，89-92
8.李延锋．细粒煤在液固流化态介质中高效分离研究[D]．徐州：中国矿业大学，2004．
9.欧泽深．煤炭洗选和脱硫的最佳工艺——重介质旋流器与微泡浮选柱的合理配合．内部资料．
10.杨俊利．我国选煤技术现状及其发展方向[J]．第十届煤炭分选及加工学术研讨会论文集，徐州：中国矿业大学出版社，2004：16-18．
11.程敢，徐宏祥等.细粒煤分选技术与设备发展.矿山机械，2012，8：1-2
12.王建军，焦红光，谌伦建.干扰床分选技术的发展与应用.选煤技术，2007，（3）：70~72
13. Zhou J, Walton K, Laskovski D, et al. Enhanced separation of mineral sands using the refuxclassifer. Minerals Engineering,2006,19:1573~1579
14.舒长河，张小平，梁翾翾.液-固流化床回收印刷线路板中金属的研究.环境工程学报，2009，3（5）：902~906
15. Mankosa M J, Carver R. M. Processing of chopped wire waste material using the floatexdensity separator..3rd international symposium on recycling of metals and engineeredmaterials.1995:111-120
16. Hyde, D.A., et al., Beneficiation of fine coal using the hydrosizer.. Mine and Quarry,1988.17(3): p.50-54.
17. Galvin, K.P., Pratten S.J. and Nicol, S.K.． Dense Medium Separation Using a Teetered-BedSeparator[J]．Minerals Engineering，1999(12)：1059-1087．
18. Maharaj, L. Pocock, J., Loveday, B.K.．The effect of distributor configuration on thehydrodynamics of the teetered bed separator[J]．Minerals Engineering,2007,20（11）：1089-1098．
19. K. P. Galvin, S. J. Pratten, N. Lambert, A. M. Callen, J. Lui．Influence of a jigging action onthe gravity separation achieved in a teetered bed separator[J]．Minerals Engineering，2002，15（12）：1199-1202．
20. J.N. Kohmuench， M.J. Mankosa． Process engineering evaluation of the CrossFlowseparator[J]．Minerals&Metallurgical Processing．2002，19(2)：43-49．
21. Kohmuench, J.N., Mankosa, M.J. etc． Industrial applications of the CrossFlowseparator[J]．2005Heavy Minerals Conference Proceedings, HMC2005：189-195．
22. Partha Venkatraman，Weng S．Kow.．application of floatex/spiral circuit in processing silicasand[J]．2000SME Annual Meeting. Preprint No00-162．
23. G. Kapure, C. Kari, S.M. Rao and N.D. Rao．The feasibility of a slip velocity model forpredicting the enrichment of chromite in a Floatex density separator[J]．International Journalof Mineral Processing，2007，82（2）：86-95．
24. K.P. Galvin, S. Pratten, G. Nguyen Tran Lam．A generalized empirical description for particleslip velocities in liquid fluidized beds[J]．Chemical Engineering Science，1998,19(11)：1045-1052．
25. E. Doroodchi, J. Zhou a, D.F. Fletcher, K.P. Galvin．Particle size classification in a fluidizedbed containing parallel inclined plates[J]．Chemical Engineering Science，2005，19(9)：162–171．
26. K.P. Galvin, E. Doroodchi, A.M. Callen, N. Lambert, S.J. Pratten．Pilot plant trial of the refluxclassifier[J]．Minerals Engineering，2001：19-25．
27. Nguyentranlam, G., Galvin, K.P.．Particle classification in the reflux classi.er[J]．MineralsEngineering，2001（14）：1081–1091．
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