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
赖唐龙 1蒋家发 2刘斌 1钟鑫 1吴宇腾 1张帆 2谢中华1
作者信息
- 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
- 折叠
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 Na2CO3 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Na2CO3后,在还原温度为1 000℃、还原时间为3 h、氢气流量为4 m3/h时,可获得FSSS粒度为44 μm的超粗钨粉;超粗钨粉再经2 000℃碳化8 h后,可获得FSSS粒度为62.25 μm的超粗碳化钨粉.
Abstract
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 Na2CO3 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 1 000℃,the reduction time is 3 h,the hydrogen flow rate is 4 m3/h,and an appropriate amount of Na2CO3 is added,the ultra-coarse tungsten powder with a relatively uniform FSSS particle size of 44 μm can be obtained.After carbonization at 2 000℃for 8 h,the ultra-coarse tungsten carbide powder with a FSSS particle size of 62.25 μm can be obtained.
关键词
蓝钨/还原/超粗钨粉/碳化/超粗碳化钨粉Key words
blue tungsten oxide/reduction/ultra-coarse tungsten powder/carbonization/ultra-coarse tungsten carbide powder引用本文复制引用
基金项目
江西钨业股份有限公司科技计划项目(JWGF-24A-10)
出版年
2024
NETL
NSTL
万方数据