红格钒钛磁铁矿氧化物相转变及非等温氧化动力学

在对红格钒钛磁铁矿基础特性研究基础上,探讨了其球团氧化过程物相的存在形式和转变过程,并通过热分析法研究了红格矿非等温氧化动力学.结果表明：红格钒钛磁铁矿属于高铬型钒钛磁铁矿,Cr2O3的质量分数为1.48%,连晶强度为625 N;主要物相组成为磁铁矿、钛磁铁矿、钒磁铁矿、铬铁矿;温度低于300℃时其氧化速率缓慢;球团氧化过程有价组元物相迁移变化历程为：Fe3O4→Fe2O3;Fe2VO4→（Cr0.15V0.85）2O3;Fe2.75Ti0.25O4→FeTiO3→Fe9TiO（15）;FeCr2O4→（Fe0.6Cr0.4）2O4,Fe（0.7）Cr1.3O3,（Cr0.15V0.85）2O...

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Published in东北大学学报(自然科学版) Vol. 38; no. 4; pp. 517 - 521
Main Author 李尉 付贵勤 储满生 朱苗勇
Format Journal Article
LanguageChinese
Published 东北大学冶金学院,辽宁 沈阳,110819 2017
Subjects
基础特性
氧化
物相转变
红格钒钛磁铁矿
非等温动力学
氧化
non-isothermal kinetics
非等温动力学
Hongge vanadium-bearing titanomagnetite
phase transformation
oxidation
物相转变
基础特性
fundamental characteristics
红格钒钛磁铁矿
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ISSN1005-3026
DOI10.3969/j.issn.1005-3026.2017.04.013

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Summary:在对红格钒钛磁铁矿基础特性研究基础上,探讨了其球团氧化过程物相的存在形式和转变过程,并通过热分析法研究了红格矿非等温氧化动力学.结果表明：红格钒钛磁铁矿属于高铬型钒钛磁铁矿,Cr2O3的质量分数为1.48%,连晶强度为625 N;主要物相组成为磁铁矿、钛磁铁矿、钒磁铁矿、铬铁矿;温度低于300℃时其氧化速率缓慢;球团氧化过程有价组元物相迁移变化历程为：Fe3O4→Fe2O3;Fe2VO4→（Cr0.15V0.85）2O3;Fe2.75Ti0.25O4→FeTiO3→Fe9TiO（15）;FeCr2O4→（Fe0.6Cr0.4）2O4,Fe（0.7）Cr1.3O3,（Cr0.15V0.85）2O3.红格矿非等温氧化动力学研究表明：当升温速率为10℃/min时,温度在220~380℃,380~500℃和500~800℃时,反应活化能分别为47.02,14.95和30.36 kJ·mol^-1.
Bibliography:Hongge vanadium-bearing titanomagnetite; fundamental characteristics; oxidation; phase transformation; non-isothermal kinetics
21-1344/T
The existence form and phase transformation of Hongge vanadium-bearing titanomagnetite（HVTM） pellets during oxidation process were investigated based on the study of fundamental characteristics of the ore.The non-isothermal oxidation kinetics of HVTM was also studied by the thermogravimetry.The results indicated that the HVTM is high chromium vanadium-bearing titanomagnetite with 1.48wt% Cr2O3 and its crystal stock strength is 625 N,the ore mainly consists of magnetite,titanomagnetite,coulsonite and chromite.The HVTM oxidizes slowly below 300 ℃.Phase transformation behavior of valuable elements is as follows： Fe3O4→Fe2O3,Fe2VO4 →（Cr0.15V0.85）2O3,Fe2.75Ti0.25O4 →FeTiO3 →Fe9TiO15,FeCr2O4 →（Fe0.6Cr0.4）2O4,Fe0.7Cr1.3O3 and（Cr0.15V0.85）2O3.The results of non-isothermal oxidation kinetics of HVTM showed that when the HVTM oxidized at 220~380 ℃,380~500 ℃ and 500~800 ℃with a heating r
ISSN:1005-3026
DOI:10.3969/j.issn.1005-3026.2017.04.013