氢化钛粉颗粒的粉碎及机理研究  

Grinding and mechanism of titanium hydride powder

作　　者：王涛[1,2,3] 龙剑平[1] 杨绍利[1,2,3] 马兰[2] 李军[2] 廖先杰[2] 

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]攀枝花学院,攀枝花617000 [3]四川省钒钛材料工程技术研究中心,攀枝花617000

出　　处：《粉末冶金技术》2017年第3期208-215,共8页Powder Metallurgy Technology

基　　金：四川钒钛产业技术研究院资助项目(2013GC0146);攀枝花科技局资助项目(2014CY-G-5)

摘　　要：本文采用闭环气流磨系统对氢化后得到的粗颗粒氢化钛粉进行粉碎,利用扫描电子显微镜和粒度分析技术对结果进行表征,并对闭环气流磨的粉碎机理进行了讨论。结果表明,对粗颗粒氢化钛粉进行闭环气流磨粉碎,克服了氢化脱氢法(hydrogenation dehydrogenation,HDH)制备的钛粉存在的粒度不均匀、粒度分布较宽等品质问题;其粉碎机理可总结为,经多股高速高压氩气流冲击、打磨,粉末颗粒自身相互碰撞、摩擦,以及粉末颗粒与磨料腔腔壁、分级轮的碰撞,粗颗粒氢化钛粉从大颗粒粉碎成细小颗粒。Titanium hydride powder （Till2） was grinded by closed loop jet mill system, the morphology and grain size distribution of particles were investigated by scanning electron microscopy （SEM） and laser-diffraction diameter tester, and the related grinding mechanism was discussed. In the results, the quality problems of titanium powder caused by hydrogenation dehydrogenation （HDH）, such as the non-uniform and wider distribution of particle size, are solved by grinding using closed loop jet mill system. The grinding mechanism of titanium hydride powder from the larger particles into fine particles is summarized as the impacting and grinding by high pressure argon flow, the collision and friction by powder particles themselves, and the collision by the inner wall of grinding cavity and classifier wheel.

关 键 词：氢化钛粉 闭环气流磨 粒度 

分 类 号：TF123[冶金工程—粉末冶金]