【作者】 李凌月；

【导师】 韦鲁滨；

【作者基本信息】 中国矿业大学（北京） ， 矿物加工工程， 2014， 博士

【摘要】 本文综合运用矿物加工学、流体力学、颗粒学、干燥动力学、传热传质学等理论对空气重介质流化床干燥与分选过程进行研究。研究了潮湿煤炭在热态流化床中的分选过程，考察了煤炭表面水分、干燥温度、干燥时间、风量等因素对分选效果的影响，建立了分选精度和分选密度与各影响因素间的数学关联式；研究了热态流化床干燥动力学，得到了剩余表面水分、加重质粘附量数学模型；分析了潮湿煤炭在热态流化床中的传热传质过程，并建立了热态流化床传热传质数学模型；研究了煤炭在热态流化床中的干燥破碎行为，建立了破碎百分比、破碎煤粉含量、跌落强度、跌落煤粉含量与各影响因素间数学关联式；对空气重介质振动流化床分选机进行了小型试验，系统研究了不同粒度、可选性煤炭分选效果随风量和抛掷指数的变化规律，并考察了煤炭粒度及可选性对小试分选机分选特性的影响；在小型试验基础上进行了空气重介质振动流化床半工业性试验，考察了风量、煤炭粒度、处理量、煤炭外在水分、煤炭可选性等因素对中试分选机分选特性的影响，并对半工业性试验工艺系统可靠性及分选机结构优化进行了研究，为设备的工业化应用奠定基础。更多还原

【Abstract】 Drying and separating process of air dense medium fluidized bed was studied by manytheories including mineral processing engineering, hydromechanics, particuology, drying kinetics,heat and mass transfer. The influence of surface water of coal, drying temperature, drying time andair volume on separation effect was investigated and mathematic correlation of separationaccuracy and separation density with each influence factor were also built up through the study ofseparation process of moist coal in thermal state fluidized bed; Mathematical models of theremaining surface water content and the adhesive medium were obtained based on the study ofdrying dynamics in thermal state fluidized bed; Heat and mass transfer process of moist coal inthermal state fluidized bed was studied, heat and mass transfer mathematical model was aquired aswell; Furthermore, mathematic correlation of fragmentation quality percentage, crushedpulverized coal content, drop strength and dropped pulverized coal content with each influencefactor were built up by the research of drying fragmentation behavior of moist coal in thermalstate fluidized bed; Small-scale test of air dense-medium vibrated fluidized bed was conducted,the change law of separation effect of different particle size of coal and coal washability with airvolume and throw index was systematically researched, and the influence of particle size of coaland coal washability on separation characteristic was studied; On the basis of small-scale test,semi-industrial test of air dense-medium vibrated fluidized bed was conducted, the influence of airvolume,particle size of coal, unit handling capacity,surface water of coal and coal washability onseparation characteristic was studied; Meanwhile, a further research on the reliability of air-densemedium semi-industrial test system and the structural optimization of separator was researched,which laid a good foundation on industrial application of the equipment.更多还原