不锈钢粉尘气体还原过程中Fe_(2)NiO_(4)的分解行为研究  

Study on Decomposition Behavior of Fe_(2)NiO_(4) during Gas Reduction of Stainless Steel Dust

作　　者：李建朝[1] 齐素慈[1] 许继芳 LIJian-chao;QISu-ci;XUJi-fang(Department of Intelligent Manufacturing,Hebei College of Industry and Technology,Shijiazhuang050091,China;School of Ironand Steel,Soochow University,Suzhou 215137,Jiangsu,China)

机构地区：[1]河北工业职业技术学院智能制造学院,石家庄050091 [2]苏州大学沙钢钢铁学院,江苏苏州215137

出　　处：《有色金属（冶炼部分）》2021年第5期17-24,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51704201);河北省高等学校科学研究计划青年基金项目(QN2020161);河北工业职业技术学院自然科学项目(ZRY2017001)。

摘　　要：研究CO和H2气体还原Fe2NiO4的热力学过程和分解特征,探讨气体组成和温度对Fe2NiO4分解行为和还原产物的影响。结果表明,CO和H2气体能够将Fe2NiO4还原为镍氧化物和铁氧化物,以及铁氧化物逐级还原,甚至直接还原成金属Ni和Fe;CO-H2混合气体还原Fe2NiO4过程失重率随混合气体中H2含量和温度发生明显变化,当温度<820℃时,CO的还原能力比H2强,失重率随着混合气体中H2含量的增加而逐渐减小;当温度>820℃时,H2的还原能力比CO强,失重率随混合气体中H2含量的增加而逐渐增大;若将Fe2NiO4完全还原为金属Ni和Fe,所需混合气体量至少为理论值的4倍。Thermodynamic process and decomposition characteristics of reduction of Fe2NiO4 by CO and H2 gases were studied.Effects of gas composition and temperature on decomposition behavior and reduction products of Fe2NiO4 were discussed.The results show that CO and H2 gas can reduce Fe2NiO4 to nickel oxide and iron oxide,then reduction of iron oxide obeys a stepwise mechanism,and even directly reduce to metallic Ni and metallic Fe.Weight loss rate during reducing of Fe2NiO4 by CO-H2 mixed gas changes significantly with H2 content and temperature in mixed gas.When temperature is lower than 820℃,reducing ability of CO is stronger than that of H2,and weight loss rate drops gradually with increase of H2 content in mixed gas.When temperature is higher than 820℃,reducing ability of H2 is stronger than that of CO,and weight loss rate rises gradually with increase of H2 content.Amount of mixed gas required to completely reduce Fe2NiO4 to metal Ni and Fe is at least 4 times of theoretical value.

关 键 词：Fe_(2)NiO_(4) 不锈钢粉尘 还原反应 气体还原 分解行为 

分 类 号：TF111.13[冶金工程—冶金物理化学] TF123