不同粒径团聚硼颗粒的堆积密度研究

Bulk Density of Different Sizes of Agglomerated Boron Particles

对团聚硼颗粒进行筛分,测量并研究了不同粒径团聚硼颗粒的松散堆积密度和振实堆积密度,采用电子扫描显微镜对团聚硼颗粒的表面形貌进行了观察。结果表明,无定形硼粉经团聚后,颗粒粒径增大,松散堆积密度和振实堆积密度均提高;随团聚硼颗粒粒径的减小,两种堆积密度均先减小后增大,当颗粒粒径在0.25 mm<d≤0.30 mm范围,颗粒的振实堆积密度达到最小;颗粒粒径在d≤0.104 mm范围,振实堆积密度达到最大;颗粒粒径在0.30 mm<d≤0.84 mm范围,颗粒的松散堆积密度达到最小,此时,团聚硼颗粒的振实堆积密度较松散堆积密度相对于其他颗粒粒径增加的程度最大。

After the agglomerated boron particles were sieved,the loose and the tap bulk densities for different sizes of agglomerated boron particles were determined,and the microstructures of agglomerated boron particles were obtained by scanning electrical microscope.Results show that the diameter of boron particles and the loose and tap bulk density increase after agglomerated for amorphous boron powder,and both of the loose bulk density and tap bulk density decrease firstly and then increase when the diameters of agglomerated boron particles decrease.The tap bulk density is the smallest when the diameter of agglomerated boron particles is in the range of 0.25-0.30 mm,meanwhile,the tap bulk density is the biggest when the diameter of agglomerated boron particles is in the range of d≤0.104 mm,and the loose bulk density is the smallest when the diameter of agglomerated boron particles is in the range of 0.30-0.84 mm,at the same time,the tap bulk density increases faster than the loose bulk density.