仲钨酸铵一步还原法制备钨粉的新工艺研究  

New Process to Prepare Tungsten Powder from Ammonium Paratungstate with One-step Reduction

作　　者：王亚雄[1] 董海刚[1] 

机构地区：[1]昆明贵金属研究所,贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《有色金属（冶炼部分）》2014年第11期52-56,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家高技术研究发展计划(863计划)项目(2012AA063204)

摘　　要：以仲钨酸铵为原料,通过分段控制还原气氛,经一步还原制备钨粉。研究了仲钨酸铵粒径、还原气氛、温度、时间和装舟量等参数对钨粉粒度和形貌的影响。结果表明,最佳工艺参数为:装舟量50g、氢气流量32L/h、升温速率10℃/min、500℃保温20min、900℃保温1.5h、风冷降温到100℃,钨粉收率大于98.5%。该工艺制备的钨粉粒径可控,同时可降低生产成本。One-step reduction process to prepare tungsten powders with ammonium paratungstate as raw material by subdivision control of reducing atmosphere was studied.The effects of particle size of ammonium paratungstate,reducing atmosphere,temperature,time and raw materials load on particle size and morphology of tungsten powders were investigated.The results show that the optimum process parameters include raw materials load of 50 g,hydrogen flow of 32 L/h,heating rate of 10 ℃/min,holding at 500 ℃ of 20 min,holding at 900 ℃ of 1.5h,and air cooling to 100 ℃.The yield rate of tungsten powder is 98.5% above.One-step reduction process has the advantages of controllable product size and low production cost.

关 键 词：仲钨酸铵 一步法 氢还原 钨粉 

分 类 号：TF123.12[冶金工程—粉末冶金]