摘要
研究了振动能量在粗颗粒(直径大于1mm)气固流化床中的传递与耗散规律,分析了振动改善流化性能的机制,揭示了振动流化床对细粒煤的分选机理.分别对6～3mm和3～1mm粒级乌海煤样进行分选,试验结果表明:振动流化床可有效排出高灰矸石,得到低灰精煤产品,2种入选煤样的分选可能偏差E值分别为0.19～0.225和0.175～0.195,说明了振动流化床可以有效地实现细粒煤的分选.
The transition and dissipation of vibration in a gas-solid fluidized bed with coarse par ticles （〉1 mm） was studied experimentally. The mechanism for the enhancement of fluidization peformance due to vibration was analyzed, from which a model for the separation fine coal particles in the bed was proposed. Finally, two types of feed coal from Wuhai region, 6-- 3 mm and 3--1 mm in diameter, were tested to evaluate the separation capability of the vibra- ted fluidized bed, and demonstrated that it can effectively discharge the gangue with high ash content and get clean coal product with low ash content. The separation efficiency, i.e. possible error E value of these two feed coal was 0. 175--0. 195 and 0.19--0. 225, respectively.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2013年第2期266-270,共5页
Journal of China University of Mining & Technology
基金
国家重点基础研究发展计划(973)项目(2012CB214904)
国家自然科学基金重点项目(51134022)
国家自然科学基金项目(51174203)
国家自然科学基金创新研究群体科学基金项目(51221462)
关键词
振动流化床
密度离析
细粒煤分选
vibrated fluidized bed
density segregation
fine coal separation
