蓝钨还原碳化法制备超粗碳化钨粉的工艺研究  

Research on the Process of Preparing Ultra Coarse Tungsten Carbide Powder by Reduction-carbonization Method of Blue Tungsten Oxide

作　　者：赖唐龙 蒋家发 刘斌 钟鑫 吴宇腾 张帆 谢中华 LAI Tanglong;JIANG Jiafa;LIU Bin;ZHONG Xin;WU Yuteng;ZHANG Fan;XIE Zhonghua(Ganzhou Huamao Tungsten Material Co.,Ltd.,Ganzhou 341000,Jiangxi,China;Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd.,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州华茂钨材料有限公司,江西赣州341000 [2]赣州有色冶金研究所有限公司,江西赣州341000

出　　处：《中国钨业》2024年第1期34-41,共8页China Tungsten Industry

基　　金：江西钨业股份有限公司科技计划项目(JWGF-24A-10)。

摘　　要：采用蓝钨进行还原碳化制备超粗碳化钨粉,通过对比超粗钨粉和超粗碳化钨粉的微观形貌与粒度,探讨不同还原碳化工艺对超粗碳化钨粉形貌及性能的影响规律。结果表明:超粗钨粉和超粗碳化钨粉的形貌一定程度上会受蓝钨形貌影响,较小的颗粒会附着在较大颗粒周围长大;添加Na_(2)CO_(3)可显著提升超粗钨粉及超粗碳化钨粉的FSSS粒度,而对粉末的形貌影响较小;当添加适量Na_(2)CO_(3)后,在还原温度为1000℃、还原时间为3 h、氢气流量为4 m^(3)/h时,可获得FSSS粒度为44μm的超粗钨粉;超粗钨粉再经2000℃碳化8 h后,可获得FSSS粒度为62.25μm的超粗碳化钨粉。Blue tungsten oxide was applied to prepare ultra-coarse tungsten carbide powder through reduction-carbonization method.The microstructure and particle size of ultra-coarse tungsten powder and ultra-coarse tungsten carbide powder were studied,and the influence of different reduction-carbonization method on the morphology and properties of ultra-coarse tungsten carbide powder was discussed.The results show that the morphology of ultra-coarse tungsten powder and ultra-coarse tungsten carbide powder prepared in this paper will be affected by the morphology of blue tungsten oxide,where smaller particles tend to grow around larger ones.Adding Na_(2)CO_(3)can significantly increase the FSSS particle size of ultra-coarse tungsten powder and tungsten carbide powder,which has little effect on the morphology.When the reduction temperature is 1000℃,the reduction time is 3 h,the hydrogen flow rate is 4 m^(3)/h,and an appropriate amount of Na_(2)CO_(3)is added,the ultra-coarse tungsten powder with a relatively uniform FSSS particle size of 44μm can be obtained.After carbonization at 2000℃for 8 h,the ultra-coarse tungsten carbide powder with a FSSS particle size of 62.25μm can be obtained.

关 键 词：蓝钨 还原 超粗钨粉 碳化 超粗碳化钨粉 

分 类 号：TF12[冶金工程—粉末冶金]