The process of preparing wollastonite ultrafine powder by impact smashing method is investigated in order that the product’s size can reach to micrometre grade and aspect ratio over 10∶1,and hence satisfy the applic...The process of preparing wollastonite ultrafine powder by impact smashing method is investigated in order that the product’s size can reach to micrometre grade and aspect ratio over 10∶1,and hence satisfy the application demand as fibre filler in industry. The results show that the aspect ratio of the wollastonite ultrafine powder manufactured by impact smashing method is 10.86:1,and the key of increasing the aspect ratio is to raise the probability of selective smashing in smashing zone.展开更多
文摘The process of preparing wollastonite ultrafine powder by impact smashing method is investigated in order that the product’s size can reach to micrometre grade and aspect ratio over 10∶1,and hence satisfy the application demand as fibre filler in industry. The results show that the aspect ratio of the wollastonite ultrafine powder manufactured by impact smashing method is 10.86:1,and the key of increasing the aspect ratio is to raise the probability of selective smashing in smashing zone.
文摘以粗颗粒Al2O3粉为原料,采用气流循环粉碎法制备了d50<1μm的Al2O3超细粉.按正交表L9(34)安排正交试验,通过方差分析确定了制备Al2O3超细粉的最佳气流循环粉碎条件,并分析了各因素对气流循环粉碎过程的影响程度.不同物料的最佳气流循环粉碎条件应通过实验确定.在本研究的实验条件下,制备Al2O3超细粉的最佳条件为:进气压力1.0 MPa,给料压力0.4 MPa,循环时间1.5 h.