CAJ | 학술논문

分析了传统液固流化床对粗煤泥分选的局限性，介绍了重介质液固流化床理论，指出可以通过提高悬浮液的密度来提高分选效果.对重介质液固流化床的流化特性进行研究，考察了不同容积浓度及上升水速时床层内部的流化特性，研究发现0.045~0.074 mm做为主导粒级的磁铁矿粉在流化床内部分布最为均匀稳定，有利于物料分选.利用普通液固流化床及重介质液固流化床对煤样开展对比试验，并对数据进行了分析后发现，与传统液固流化床相比重介质液固流化床分选所得精煤灰分降低了0.98％，尾煤灰分提高了6.55％，分选效果得到明显改善.
분석료전통액고류화상대조매니분선적국한성，개소료중개질액고류화상이론，지출가이통과제고현부액적밀도래제고분선효과.대중개질액고류화상적류화특성진행연구，고찰료불동용적농도급상승수속시상층내부적류화특성，연구발현0.045~0.074 mm주위주도립급적자철광분재류화상내부분포최위균균은정，유리우물료분선.이용보통액고류화상급중개질액고류화상대매양개전대비시험，병대수거진행료분석후발현，여전통액고류화상상비중개질액고류화상분선소득정매회분강저료0.98％，미매회분제고료6.55％，분선효과득도명현개선.
The authors analyzed limitation of coarse coal slime separation in traditional liquid solid fluidized bed,introduced separation principle of dense medium liquid solid fluidized bed,and also pointed out that enhancing separation effect by increasing suspension density. According to the study on fluidization characteristics of dense medium liquid solid fluidized bed and investiga-ting fluidization characteristics of interior bed layer with different volumetric concentrations and water rise velocities,the results showed that when the particle size of magnetite is 0.045~0.074 mm within the liquid solid fluidized bed,the distribution is most stable and the most favor-able to separation. Analysis the data of comparison experiments between common medium liquid solid fluidized bed and the dense liquid solid fluidized bed,the authors found that comparing with traditional liquid solid fluidized bed,the cleaned coal ash decreased 0.98% and the tail coal ash increased 6.5 5% in separation of dense medium liquid solid fluidized bed. Thus,the separation effects were obvious changed.