摘要：采用自制的控制性气流粉碎机制备等积球形墨粉,通过改变粉碎强度、第一级分级机转速和第一级分级机二次风量来控制墨粉的颗粒形貌,通过改变第二级分级机转速和第二级分级机二次风量来控制墨粉粒度分布的集中性。结果表明,在流化床粉碎强度为0.6 MPa,流化床底部二次风量为86 m³/h,第一级分级机电机变频器频率为17 Hz,第二级分级机电机变频器频率为36 Hz,第二级分级机二次风量为287 m³/h时,制得墨粉的粒度分布最集中,形貌最均匀,球形度最高,此时第二级分级机产量为72.5 kg/h,成品率为79.2%。

关键词：墨粉；控制性气流粉碎；气流分级；等积球形

Abstract： Equivalent spherical toners were prepared by a self-developed controlled air jet mill. The particle shape of toners was controlled by changing grinding strength， rotation rate of the first stage classifier， and secondary flow of the first stage classifier. The particle size distribution of toners was controlled by changing rotation rate of the second stage classifier and secondary flow of the second stage classifier. The results show that when the grinding strength of fluidized bed is 0.6 MPa， the secondary flow at the bottom of fluidized bed is 86 m³/h， the frequency of the first stage motor frequency converter is 17 Hz， the frequency of the second stage motor frequency converter is 36 Hz， and the secondary flow of the second stage classifier is 287 m³/h， relatively centralized particle size distribution， even particle shape and higher sophericity are obtained. The production yield is 72.5 kg/h and the qualified rate is 79.2%. 

Keywords: toner； controlled air grinding； air classification； equivalent spherical