Drying And Separating Process Of Air Dense Medium Fluidized Bed

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.