Influence of NaCl Additive on the Reduction Process of MoO3 to Mo2Cby High-Purity CO Gas

Archives of Metallurgy and Materials

article

Biao-Hua Que¹  Lu Wang¹  Bao Wang³  Yi Chen³  Zheng-Liang Xue³ 

[1] Wuhan University Of Science And Technology, Hubei Provincial Key Laboratory For New Processes Of Ironmaking And Steelmaking;Foshan ,(Southern China) Institute For New Materials;Wuhan University Of Science And Technology, The State Key Laboratory Of Refractories And Metallurgy

关键词: Mo2C;    ·MoO3;    CO;    ·NaCl;   

DOI  :  10.24425/amm.2022.137819

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

In this work, influence of NaCl additive on the transformation process of MoO3 to Mo2C under pure CO atmosphere in therange of room temperature to 1170 K was investigated. The results showed that transformation of MoO3 to Mo2C can be roughlydivided into two stages: the reduction of MoO3 to MoO2 (the first stage) and the carburization of MoO2 to Mo2C (the secondstage). As to the first stage, it was found that increasing the content of NaCl (from 0 to 0.5 wt.%) was beneficial for the increaseof reaction rate due to the nucleation effect; while when the content of NaCl increased to 2 wt.%, the reaction rate will be decreased in turn. As to the second stage, the results showed that reaction rate was decreased with the increase of NaCl, which maybe due to the formation of low-melting point eutectic. The work also found that morphology of as-prepared Mo2C was irregularand particle size of it was gradually increased with increasing the NaCl content. According to the results, the possible reactionmechanism was proposed.

【 授权许可】

CC BY-NC