摘要
从颗粒细度的描述方法、粉碎方式、超细粉碎特殊性等方面，对机械法超细粉碎机理和粉碎能耗进行了理论研究，得出利用挤压、研磨力作用方式粉碎物料能量利用率高，新生表面积大，是超细粉碎的较好方式的结论。提出了超细粉的疲劳破碎机理和颗粒粉碎能耗机制，并根据线弹性断裂力学理论，把陶瓷类等脆性材料的破碎能定义为颗粒破碎时所具有的弹性应变能，推导了粒度与能耗的解析关系式，提出了磨机粉碎的极限粒度和经济粒度两个新概念。
The mechanism and fracture energy of mechanical method about preparation of ultrafine powder as viewed from particle size,means and particular properties of ultrafine grinding are inversti-gated,It is concluded that compression and attribution are the better methods of ultrafine grinding;Onthe basis of this, the mechanism of exhaustion grinding and energy consume are presented.Accordingto the theory of linear elastic fracture meclianics,the fracture energy of particle is defined as elasticstress energy when the particle has been fracture. The physical model of grinding in machine is estab-lished.The relationship between particle sizes and grinding energy consunies is derived.The two newconcepts of grinding limit particle size and economical grinding particle size are presentedh.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1994年第4期1-7,共7页
Journal of Southeast University：Natural Science Edition
关键词
超细粉碎
超细粉
粉末技术
能耗
powder
preparation
mechanism
energy comsuption / ultrafine grinding
conipression and attribution
.grinding limit porticle size
grinding economical particle size
