分级式冲击磨制备超细云母微粉的工艺研究

Technologic Study on Preparation of Ultra-fine Mica Powder by Multi-scale Impact Mill

为了得到高纯、超细云母粉体,本实验采用分级式冲击磨在干法状态下制备超细云母微粉。考察了在改变分级机转速、引风机流量工艺参数时云母微粉的粒度和产量变化情况。结果表明:云母微粉的100目筛上量主要受分级机转速的影响,而云母微粉的产量及粒度分布则主要受引风机流量的影响,并通过优化分级机和引风机工作参数可以实现对云母产量和出料粒度的控制,满足不同利用领域的要求,解决传统加助磨剂和湿法处理还存在的二次处理问题。

in order to obtain highly pure ultra-fine mica powder, the multi-scale impact mill was adopted to prepare it with the drying method in this experiment. After the investigation of the yield and particle size of mica powder by changing the speed of classifier and flux of induced-draft fan, the results show that： the quantity of mica powder plus 100 mesh sieve is mainly affected by the speed of classifier, whilst the yield and particle size of mica powder are mainly affected by the flux of induced-draft fan, and they can be controlled by optimizing the working parameters of classifier and induced draft fan to meet the requirements of various fields, which can avoid the problem of secondary treatment for the grinding aids or wet treatment.