Nonisothermal Crystallization, Growth, and Shape Control of Magnetite Crystals in Molten Nickel Slag During Continuous Cooling

doi:10.1007/s11663-022-02491-9

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	Nonisothermal Crystallization, Growth, and Shape Control of Magnetite Crystals in Molten Nickel Slag During Continuous Cooling
	Li, Bin; Du, Xueyan; Shen, Yingying; Zhang, Zhilong; Rong, Taolin
	2022-06
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN	1073-5615
卷号	53 期号:3 页码:1816-1826
摘要	Efficient recovery of valuable metals from metallurgical slag has attracted an increasing amount of attention in recent years. In this paper, iron from nickel slag was recycled efficiently via a molten oxidation method. Nonisothermal crystallization of oxidized molten nickel slag and the growth of magnetite crystals were observed in situ by high-temperature confocal laser scanning microscopy (HT-CLSM). The growth and shape-control mechanism of magnetite crystals were also analyzed. The results show that the initial crystallization temperature of magnetite crystals in the melt was approximately 1450 degrees C, and the stable growth temperature ranged from 1400 degrees C to 1200 degrees C. The average growth rate of the crystals ranged from 0.013 to 0.141 mu m/s at cooling rates of 5 to 50 degrees C/min. The magnetite crystals formed in the molten slag exhibit granular and dendritic morphologies. Stirring in the melt favors the formation of granular crystals with octahedral structures and depresses dendrite growth. The crystallization dynamics of magnetite crystals in molten slag is dominated by diffusion control, and the crystallization changed from three-dimensional growth to low-dimensional growth with the decrease of crystallization temperature. The apparent crystallization activation energy is in the range of - 581.98 +/- 46.86 to - 339.36 +/- 34.01 kJ/mol at a cooling rate of 5 to 50 degrees C/min.
关键词	Activation energy Cooling Growth rate Magnetite Metal recovery Continuous cooling Cooling rates Crystallization control Crystallization growth Growth control Magnetite crystals Molten Slag Nonisothermal crystallization Recovery of valuable metals Shape control
DOI	10.1007/s11663-022-02491-9
收录类别	SCIE ; EI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000773847800003
出版者	SPRINGER
EI入藏号	20221311875132
EI主题词	Nickel
EI分类号	548.1 Nickel ; 641.2 Heat Transfer
来源库	WOS
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158090
专题	研究生院材料科学与工程学院
通讯作者	Du, Xueyan
作者单位	Lanzhou Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Li, Bin,Du, Xueyan,Shen, Yingying,et al. Nonisothermal Crystallization, Growth, and Shape Control of Magnetite Crystals in Molten Nickel Slag During Continuous Cooling[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2022,53(3):1816-1826.
APA	Li, Bin,Du, Xueyan,Shen, Yingying,Zhang, Zhilong,&Rong, Taolin.(2022).Nonisothermal Crystallization, Growth, and Shape Control of Magnetite Crystals in Molten Nickel Slag During Continuous Cooling.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,53(3),1816-1826.
MLA	Li, Bin,et al."Nonisothermal Crystallization, Growth, and Shape Control of Magnetite Crystals in Molten Nickel Slag During Continuous Cooling".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 53.3(2022):1816-1826.

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