doi:10.16186/j.cnki.1673-9787.2020050106

Received:2020/05/31

Revised:2020/09/24

Published:2022/07/15

Pickling technology in the wet purification process of sodium reduction high specific capacity tantalum powder

LI Fucheng 1,2,3

1.State Key Laboratory of Rare Metal Special Materials， Northwest Rare Metal Materials Research Institute， Shizuishan  753000,Ningxia,China;2.National Engineering Research Center of Antalum and Niobium Materials,Shizuishan  753000,Ningxia，China;3.Ningxia Orient Tantalum Industry Co., Ltd.，CNMC Ningxia Orient Group Co., Ltd.，Shizuishan  753000,Ningxia,China

Abstract: In order to reduce the content of various chemical impurities in tantalum powder, and to improve the powder purity and quality ,after the metal tantalum powder after sodium reduction ( primary particles ) was processed through wet purification processing experiment with different pickling process parameters.According to the designed pickling process , the removal effects of the same volume of tantalum powder (FTa-40K) in differ- ent acid concentration, under the condition of different time and different ratio of acid pickling of O、Fe、Ni chemical impurities were studied. The results showed that the mixed acid concentration of Φ =(10 ±0. 1)%（HNO₃）、Φ =（1.5 ±0. 1）% (HF),the ratio of acid that HNO₃: HF=10.8:1 ，pickling time as （150±2）min, were the optimum chemical pickling process parameters. It provided theory for research and production of high specific capacity tantalum powder.

Key words:high specific capacity tantalum powder;wet purification;pickling technology;impurty content

钠还原高比容钽粉湿法提纯过程中酸洗新工艺_李福成.pdf