低温离解高温自还原制备细颗粒蓝色氧化钨  

Preparation of Fine Blue Tungsten Oxide by Low Temperature Dissociation and High Temperature Self-Reduction

作　　者：陈升 CHEN Sheng(Ganzhou Huaxing Tungsten Products Co.,Ltd.,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州华兴钨制品有限公司

出　　处：《中国钨业》2019年第4期62-65,共4页China Tungsten Industry

摘　　要：研究采用仲钨酸铵作为原料,先在回转炉中200℃条件下进行低温煅烧,脱去部分结晶水与氨,再在500~750℃高温条件下利用剩余的氨进行自还原,最终制备出费氏粒度低至9.8μm的细颗粒蓝色氧化钨。研究分析了仲钨酸铵晶体在煅烧分解过程中的化学成分变化以及低温煅烧后晶体颗粒粒度与形态的变化,比较了常规的高温还原法与试验研究介绍的方法所制备的蓝色氧化钨在粒度与微观形貌上的区别。最终通过试验数据分析,该方法可以在不显著增加能耗的条件下有效地制备出费氏粒度在9~12μm的细颗粒蓝色氧化钨。In the experiment,ammonium paratungstate was used as the raw material.The calcinations at a temperature of 200℃in rotary furnace removes some crystal water and ammonia.The residual ammonia was utilized for self-reduction at a high temperature of 500~750℃.Fine blue tungsten oxide particles with Feynman particle size as small as 9.8μm were prepared.The change of chemical composition of ammonium paratungstate crystal during calcination and decomposition and the change of crystal particle size and morphology after low-temperature calcination were studied and analyzed.The difference in particle size and microscopic morphology between blue tungsten oxide prepared by conventional high-temperature reduction method and the method introduced by experimental research was compared.The analysis of experimental data shows the method can effectively prepare fine-grained blue tungsten oxide with a Fischer particle size of 9~12μm without significantly increasing energy consumption.

关 键 词：仲钨酸铵 蓝色氧化钨 低温离解 自还原 细颗粒 

分 类 号：TF111.13[冶金工程—冶金物理化学]