-0.5mm煤粉对空气重介质流化床流化特性的影响  

-0.5 mm Fine Coal Affected to Fluidized Features of Air Heave Medium Fluidized Bed

作　　者：付芝杰[1] 赵跃民[1] 骆振福[1] 段晨龙[1] 杨旭亮[1] 董良[1] 李强[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《煤炭科学技术》2013年第1期125-128,共4页Coal Science and Technology

基　　金：国家自然科学基金创新群体资助项目(51221462);国家自然科学基金资助项目(51174203);国家自然科学基金委-神华集团"煤炭联合基金"重点资助项目(51134022)

摘　　要：为研究-0.5 mm煤粉在空气重介质流化床中的分布规律与影响效果,采用煤粉含量分布标准差、煤粉灰分分布标准差以及在稳定区间内的压降波动标准差3个指标分析了煤粉在分选流化床中的流化质量及分选性能。结果表明:-0.5 mm煤粉对流化质量有显著影响,少量-0.5 mm煤粉能促进形成密度均匀稳定的分选流化床,过多煤粉含量对流化床密度稳定不利,试验条件下最佳的-0.5 mm含量为6%;同时揭示了-0.5 mm煤粉在流化床中的分布规律,为空气重介质流化床的分选稳定控制提供了依据。In order to study the distribution law and influence effect of the-0.5 mm fine coal on the air heave medium fluidized bed,a fine coal content distribution standard difference,an ash content distribution standard difference of the fine coal and a pressure fluctuation standard difference within the stabilized sections were applied to analyze the fluidized quality and separation performances of-0.5 mm fine coal on the separation fluidized bed.The results showed that-0.5 mm fine coal would obviously affect to the fluidized quality,small amount-0.5 mm fine coal could promote and form an uniform and stable density separation fluidized bed,more-0.5 mm fine coal content would not favorable to the density stability of the fluidized bed and the optimal initial content of-0.5 mm fine coal would be 6% under the test condition.Meanwhile the distribution law of-0.5 mm fine coal on the fluidized bed was revealed to provide the basis to the separation stable control of the air heave medium fluidized bed.

关 键 词：空气重介质流化床 煤粉 压降 床层密度 流化性能 

分 类 号：TD94[矿业工程—选矿]