气体雾化法制备锌粉及其性能研究  

Research on Preparation of Zinc Powder by Gas Atomization and Its Properties

作　　者：胡慧茹 尚青亮[3] 何萧含 周林[3] 刘捷[3] 易建宏[1,2] 甘国友[1,2] 张家敏[1,2] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]云南省新材料制备与加工重点实验室,云南昆明650093 [3]昆明冶金研究院,云南昆明650031

出　　处：《热加工工艺》2016年第18期112-116,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51464027);昆明理工大学分析测试基金资助项目(20150054;2014KF134)

摘　　要：探讨了锌粉雾化的基本原理,以及雾化喷嘴结构、喷射顶角、锌液温度和气体压力等对锌粉粒度的影响,并运用激光粒度分析仪、比表面积测试仪和蔡司显微镜等对制备的雾化锌粉的粒度分布、比表面积大小及锌粉形貌进行分析。研究的锌液温度为(620±10)℃,雾化压力为1.6 MPa;结果表明:适当提高锌液温度及提高喷枪入口的气流速度或压力均有利于锌粉的细化;雾化法制得的锌粉呈近球形,锌粉的D_(50)≤20μm;随锌粉的平均粒径减小,比表面积呈逐渐增大的趋势,锌粉粒径为-100^-325目时,比表面积从0.1367 m^2/g增大到0.2233 m^2/g。The fundamental of gas atomization and the influence of atomization nozzle structure, spray angle, liquid zinc temperature, and gas pressure on the size of zinc powder were discussed. The particle size distribution, specific surface area and powder morphology of the prepared atomization zinc powder were analyzed by laser particle size analyzer, specific surface area tester and Zeiss microscope. The temperature of experiment molten zinc is （620±10）℃, and the atomization pressure is 1.6 MPa. The results show that increasing the temperature of molten zinc and air velocity or pressure of gun inlet properly are conducive to refining the zinc powder. The zinc powder prepared by gas atomization is sphere and the zinc powder＇s D50≤20μm. With the decrease of the average size of zinc powder, the specific surface area increases. With the zinc powder＇s size increasing from-100 mesh to -325 mesh, the specific surface area increases from 0.1367 m^2/g to 0.2233 m^2/g.

关 键 词：雾化 喷嘴 锌粉 粒度分布 比表面积 形貌 

分 类 号：TF813[冶金工程—有色金属冶金] TG146.13[一般工业技术—材料科学与工程]