Fluidization behavior and reduction kinetics of pre-oxidized magnetite-based iron ore in a hydrogen-induced fluidized bed
Fluidization behavior and reduction kinetics of pre-oxidized magnetite-based iron ore in a hydrogen-induced fluidized bed作者机构：Chair of Ferrous MetallurgyMontanuniversitaet LeobenFranz-Josef-Straβe 188700LeobenAustria K1-MET GmbHStahlstraße 144020 LinzAustria The State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing 100083China
出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)
年 卷 期：2022年第29卷第10期
页 面：1873-1881页
核心收录：
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 0703[理学-化学] 0702[理学-物理学]
基 金：the funding support of K1-MET GmbH,metallurgical competence center the financial support from the program of China Scholarship Council(No.201908420284)
主 题：magnetite-based iron ore prior oxidation fluidization behavior kinetic analysis hydrogen reduction
摘 要：The influence of different pre-oxidation temperatures and pre-oxidation degrees on the reduction and fluidization behaviors of magnetite-based iron ore was investigated in a hydrogen-induced fluidized *** raw magnetite-based iron ore was pre-oxidized at 800 and1000℃ for a certain time to reach a partly oxidation and deeply oxidation *** structure and morphology of the reduced particles were analyzed via optical microscope and scanning electron microscopy(SEM).The reaction kinetic mechanism was determined based on the double-logarithm *** results indicate that the materials with higher oxidation temperature and wider particle size range show better fluidization *** lower oxidation temperature is more beneficial for the reduction rate,especially in the later reduction *** pre-oxidation degree shows no obvious influence on the fluidization and reduction *** on the kinetic analysis,the reduction progress can be divided into three *** reduction mechanism was discussed combing the surface morphology and phase structure.
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