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Effects of Low-temperature Pre-oxidation on the Titanomagnetite Ore Structure and Reduction Behaviors in a Fluidized Bed
Adetoro, Ajala Adewole1,2; Sun, Haoyan1; He, Shengyi1,2; Zhu, Qingshan1,2; Li, Hongzhong1
2018-04-01
发表期刊METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN1073-5615
卷号49期号:2页码:846-857
摘要With respect to high efficient utilization of low-grade iron ore resource, the behavior of low-temperature "973 K to 1123 K (700 A degrees C to 850 A degrees C)" oxidation, on the phase transition of SA TTM ore (South African titanomagnetite), and its effect on subsequent reduction was investigated. The results showed that hematite and rutile are the oxidation product below 1048 K (775 A degrees C), while pseudobrookite is the stable phase above 1073 K (800 A degrees C). With the increase in temperature and oxidation time, there is a competitive relationship between the amount of hematite and pseudobrookite generated. The reduction efficiency of SA TTM was significantly improved by oxidation pretreatment, primarily due to the dissociation of titania-ferrous oxides to more easily reducible hematite. But the generation of pseudobrookite phase decreases the amount of free hematite available for reduction, which weakens the improvement effect of pre-oxidation. The equilibrium relationship between the metallization degree and the gas reduction potential for TTM ore with pre-oxidation treatment has been built. Finally, the reduction metallization degree for the first and second step can be improved averagely by 16.67 and 3.45 pct, respectively, for sample pre-oxidized at 1098 K (825 A degrees C) for 15 and 90 minutes, while 26.96 and 7.4 pct, improvement is achieved for sample pre-oxidized at a lower temperature of 1048 K (775 A degrees C) for 120 minutes. (C) The Minerals, Metals & Materials Society and ASM International 2018
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1007/s11663-018-1193-z
收录类别SCI
语种英语
关键词[WOS]TITANIA-FERROUS ORE ; CARBON-MONOXIDE ; METALLURGICAL PROCESSES ; ILMENITE ; OXIDATION ; KINETICS ; MAGNETITE ; VANADIUM ; CONCENTRATE ; EXTRACTION
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者National Program on Key Basic Research Project of China (973 Program)(2013CB632603) ; Chinese Academy of Sciences-The World Academy of Sciences (CAS-TWAS) ; National Natural Science Foundation of China(51404228 ; 21736010)
WOS记录号WOS:000426808500034
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文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24102
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Adetoro, Ajala Adewole,Sun, Haoyan,He, Shengyi,et al. Effects of Low-temperature Pre-oxidation on the Titanomagnetite Ore Structure and Reduction Behaviors in a Fluidized Bed[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2018,49(2):846-857.
APA Adetoro, Ajala Adewole,Sun, Haoyan,He, Shengyi,Zhu, Qingshan,&Li, Hongzhong.(2018).Effects of Low-temperature Pre-oxidation on the Titanomagnetite Ore Structure and Reduction Behaviors in a Fluidized Bed.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,49(2),846-857.
MLA Adetoro, Ajala Adewole,et al."Effects of Low-temperature Pre-oxidation on the Titanomagnetite Ore Structure and Reduction Behaviors in a Fluidized Bed".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 49.2(2018):846-857.
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