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粉末冶金材料科学与工程  2020, Vol. 25 Issue (3): 227-233    
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
高氧铌粉的镁还原降氧工艺
刘芳1,2, 李庆奎1, 罗俊锋2, 徐国进2, 张巧霞2
1.郑州大学 河南省资源与材料工业技术研究院,郑州 450001;
2.有研亿金新材料有限公司,北京 102200
Deoxygenation process of high oxygen niobium powders by magnesium reduction
LIU Fang1,2, LI Qingkui1, LUO Junfeng2, XU Guojin2, ZHANG Qiaoxia2
1. Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University, Zhengzhou 450001, China;
2. Grikin Advanced Materials Co., Ltd, Beijing 102200, China
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摘要 采用真空烧结炉对氧含量为4.1×10-3的工业铌粉进行镁热还原,然后酸洗,以降低铌粉的氧含量。通过研究还原温度、还原时间和镁粉用量对铌粉氧含量的影响,优化铌粉的镁还原降氧工艺。结果表明,在还原温度为1 133 K、镁添加量足够的条件下还原2~6 h,铌粉的氧含量随还原时间延长先降低而后趋于稳定。在镁添加量为理论用量的4倍、还原时间为4 h条件下,随还原温度从953 K升高至1 133 K,脱氧铌粉的氧含量从8.90×10-4下降至3.56×10-4;继续升高还原温度至1 203 K,铌粉的氧含量反而升高。铌粉的最佳镁还原脱氧工艺为还原温度1 133 K、镁用量为理论用量的4倍、还原4 h,脱氧后铌粉的氧含量为3.56×10-4,铌粉形貌基本不变。
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刘芳
李庆奎
罗俊锋
徐国进
张巧霞
关键词 高氧铌粉降氧镁还原还原温度还原时间    
Abstract:Hydrogen-dehydrogenation and oxygen reduction equipment was used to reduce the oxygen content of the industrial niobium powder with an original oxygen content of 4.1×10-3 by magnesium reduction. The effects of reduction temperature, reduction time and magnesium powder amount on the oxygen content of niobium powder were studied. The magnesium reduction and oxygen reduction process of niobium powder was optimized. The results show that when the reduction temperature is 1 133 K and the amount of magnesium is enough, the oxygen content of niobium powder decreases first and then tends to be stable with the increase of reduction time. The oxygen content of deoxidized niobium powder decreases from 8.90×10-4 to 3.56×10-4 with the increase of reduction temperature from 953 K to 1 133 K at 4 times of theoretical magnesium addition and 4 h of reduction time. With increasing the temperature to 1 203 K, the oxygen content of niobium powder increases instead. The best magnesium reduction process of niobium powder is that the reduction temperature is 1 133 k, the amount of magnesium is 4 times of the theoretical amount, the reduction time is 4 h, and the oxygen content of niobium powder after deoxidization is 3.56×10-4. The morphology of niobium powder is basically unchanged.
Key wordshigh oxygen niobium powders    deoxygenation    magnesium reduction    reduction temperature    reduction time
收稿日期: 2019-12-16      出版日期: 2020-08-11
ZTFLH:  TG146.4+16  
通讯作者: 李庆奎,教授。电话:18310299062;E-mail: 18236138640@163.com   
引用本文:   
刘芳, 李庆奎, 罗俊锋, 徐国进, 张巧霞. 高氧铌粉的镁还原降氧工艺[J]. 粉末冶金材料科学与工程, 2020, 25(3): 227-233.
LIU Fang, LI Qingkui, LUO Junfeng, XU Guojin, ZHANG Qiaoxia. Deoxygenation process of high oxygen niobium powders by magnesium reduction. Materials Science and Engineering of Powder Metallurgy, 2020, 25(3): 227-233.
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