NbCl_5氢还原制备金属铌粉的热力学模拟  

Thermodynamic simulation of hydrogen reduction of NbCl_5 to produce Nb metal powder

作　　者：曹战民[1] 乔芝郁[1] 朱骏[1] 朱鸿民[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《北京科技大学学报》2008年第6期640-643,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50601001)

摘　　要：基于过程模拟开发组件库SimuSage开发了通过氢气还原氩气气氛中的NbCl5制备超细铌粉的热力学模拟程序,讨论了蒸发温度、载气用量(Ar(g))、还原反应温度、H2(g)用量、收集区温度等关键参数的影响.研究表明:NbCl5(s)的蒸发率以及气相中NbCl5(g)的浓度取决于蒸发温度及氩气的用量;还原温度为1000℃时固相产物为Nb(s)单一相所需的最小H2(g)用量为20 mol/1 mol NbCl5;提高收集区温度有利于获得高纯度固相Nb粉产物.A thermodynamic simulation program for Nb powder production process by hydrogen reduction of NbCl5 in argon was developed by using SimuSage Software, which is a component library used in the developing of process simulation. The effects of the key parameters such as evaporation temperature, loading gas amount （Ar（g））, reduction temperature, He （g） amount and collection temperature were studied by the simulation program. The results show that the evaporation rate of NbCl5 （s） and the content of NbCls（g） in gas are dependent upon the evaporation temperature and the amount of Ar（g） used. To get Nb（s） as the unique solid product, a minimum H2 （g） amount of 20 mol per mol NbCls is needed when the reduction temperature is 1000 ℃. High temperature of collection is helpful to the purity of the solid Nb powder product.

关 键 词：铌粉 氢还原 热力学模拟 工艺参数 

分 类 号：TG146.4[一般工业技术—材料科学与工程]