Thermodynamics and kinetics of FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process

doi:10.1088/2053-1591/ab2eeb

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Thermodynamics and kinetics of FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process
	Shen, Yingying; Chong, Junkai; Huang, Ziniu; Tian, Jianke; Zhang, Wenjuan; Tang, Xingchang; Ding, Wanwu; Du, Xueyan
刊名	MATERIALS RESEARCH EXPRESS
	2019-09
卷号	6 期号:9
关键词	thermodynamics kinetics magnetite phase oxidizing temperature oxidizing time
ISSN号	2053-1591
DOI	10.1088/2053-1591/ab2eeb
英文摘要	In view of the utilization of iron resources in nickel slag, water-quenched nickel slag from flash furnace was treated by using a molten oxidation method. During this process, the iron components in the nickel slag were melted and oxidized, finally transferred to magnetite phases (Fe3O4). In this paper, the thermodynamic analysis and calculation of the Fe-containing phase evolution during the molten oxidation process were carried out, the transfermation possibility of iron component as magnetite phase was analyzed, and the kinetics of FeO transfermation to Fe3O4 in modified nickel slag during molten oxidation process was studied. The study results show that the use of CaO in oxidizing process favors the decomposition of fayalite phase and formation of magnetite phase. The Fe3O4 spinel solid solution precipitated from the CaO-FeO-MgO-SiO2 system under the conditions of slag basicity of 0.90 and oxygen partial pressure of 0.21 atm. With the extension of oxidizing time, FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process. The magnetite crystals gradually change from fine dendritic shape to granular shape at lower oxidizing temperature. But dendrites exist during the oxidization at the higher oxidizing temperature. The formation rate constant and apparent activation energy of magnetite crystals is calculated to be 0.0183 and 68.17 kJ mol(-1), respectively.
资助项目	National Natural Science Foundation of China[51661021] ; Science and Technology Major Projects of Gansu Province[145RTSA004] ; Youth Science and Technology Foundation of Gansu Province[17JR5RA116]
WOS研究方向	Materials Science
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000474935400023
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31593]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院研究生院
通讯作者	Du, Xueyan
作者单位	Lanzhou Univ Technol, Sch Mat & Sci, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Shen, Yingying,Chong, Junkai,Huang, Ziniu,et al. Thermodynamics and kinetics of FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process[J]. MATERIALS RESEARCH EXPRESS,2019,6(9).
APA	Shen, Yingying.,Chong, Junkai.,Huang, Ziniu.,Tian, Jianke.,Zhang, Wenjuan.,...&Du, Xueyan.(2019).Thermodynamics and kinetics of FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process.MATERIALS RESEARCH EXPRESS,6(9).
MLA	Shen, Yingying,et al."Thermodynamics and kinetics of FeO transferred to Fe3O4 in modified nickel slag during molten oxidation process".MATERIALS RESEARCH EXPRESS 6.9(2019).