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A 40–60 t/h modularized dry coal beneficiation process with a novel method to control the bed was designed around a gas-solid
fluidized bed separator. Furthermore, the hydrodynamics of medium-solids consisting of wide-size-range magnetite powder (0.3–0.06
mm) and <1 mm fine coal were numerically studied. The simulation results show that the fluidization performance of the wide-size-range
medium-solid bed is good. The separation performance of the modularized system was then investigated in detail using a mixture
of <0.3 mm magnetite powder (mass fraction of 0.3–0.06 mm particles is 91.38 %) and <1 mm fine coal as solid media. The experimental
results show that at separation densities of 1.33 g/cm3 or 1.61 g/cm3, 50–6 mm coal can be separated effectively with probable error, E, values of 0.05 g/cm3 and 0.06 g/cm3, respectively. This technique is beneficial for saving water resources and for the clean utilization of coal. 相似文献
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介绍了空气重介流化床干法选煤介耗形成的主要原因,从实际出发提出了严格控制入选原煤外在水分、改善脱介筛的脱介效果、合理选择和使用磁选设备、正确设计及调节除尘系统、加强生产管理等一系列措施。有效降低了介耗,减少了生产成本。 相似文献
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隔振器是用来支撑振动机并降低振动机械工作过程中所产生的动载荷对地基影响的机构,在振动机械设计过程中,如果隔振器参数选择不当,将会导致隔振器无法支撑振动机或振机跳出弹簧等不良后果,因此,合理地选择隔振器的参数具有十分重要的意义。 相似文献