讨论了煅烧预处理硅灰石在机械粉碎过程中矿物的受力状况 ,分析了圆盘式气流磨和星式球磨在粉碎针状硅灰石中 ,对其粒度及长径比的影响因素 ,讨论了针状硅灰石超细粉碎过程中的粉碎机理、择优破碎方位及对长径比的影响。经热锻烧预处理的硅灰石 ,采用圆盘式气流磨粉碎 ,能较好地保护其针状结构 ,且能获得较细粒度的超细针状粉 ,这对针状矿物超细粉碎过程中的晶形保护具有指导意义 The mechanical behavior of wollastonite pretreated by calcination in mechanical crushing process was discussed. The influencing factors on particle size and aspect ratio of disc wollastonite and star mill in pulverized acicular wollastonite were analyzed. The mechanism of pulverization, the location of preferential crushing and the effect on the aspect ratio of the acicular wollastonite are discussed. The wollastonite pretreated by hot calcination can be finely ground by the disc-type jet milling, which can protect the needle-shaped structure and obtain fine-grained fine needle-shaped powder, which is finely pulverized Crystal protection during the process is instructive