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Nucleation and growth of iron- and phosphorus-rich phases from a modified steelmaking waste slag
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Li, Juncheng, Li, Guoxuan, Qiu, Feng, Wang, Rong, Liang, Jinshan, Zhong, Yi, Guan, Dong, Sridhar, Seetharaman and Li, Zushu (2023) Nucleation and growth of iron- and phosphorus-rich phases from a modified steelmaking waste slag. International Journal of Minerals, Metallurgy and Materials, 30 . pp. 378-387. doi:10.1007/s12613-022-2553-x ISSN 1674-4799.
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WRAP-Nucleation-and-growth-of-iron-and-phosphorus-rich-phases-from-a-modified-steelmaking-waste-slag-Li-2023.pdf - Accepted Version - Requires a PDF viewer. Download (1554Kb) | Preview |
Official URL: https://doi.org/10.1007/s12613-022-2553-x
Abstract
Recovering the iron (Fe) and phosphorus (P) contained in steelmaking slags not only conserves natural resources, but also supports achieving the sustainability of the steel industry. We had previously found the possibility of recovering Fe and P resources contained in steelmaking slags by adjusting oxygen partial pressure and adding modifier B2O3. As a fundamental study for efficiently recovering Fe and P from steelmaking slag, in this study, the crystallization behaviors of the CaO-SiO2-FeO-P2O5-B2O3 melt has been observed in situ, through a confocal scanning laser microscope. The kinetics of nucleation and growth of Fe- and P-rich phases have been calculated using a classical crystallization kinetic theory. During cooling, a Fe3O4 phase with faceted morphology was observed as the 1st precipitated phase in the isothermal interval of 1300 ℃-1150 ℃, while Ca10P6O25, with rod-shaped morphology, was found to be the 2nd phase to precipitate in the interval 1150 ℃ -1000 ℃. The crystallization abilities of Fe3O4 and Ca10P6O25 phases in the CaO-SiO2-FeO-P2O5-B2O3 melt were quantified with the index of (TU-TI)/TI (where TI and TU are the peak temperatures of the nucleation rate and growth rate of a phase) and the crystallization ability of magnetite (Fe3O4) was found to be larger than that of calcium phosphate (Ca10P6O25) phase. The optimum temperature range for the crystallization of magnetite (Fe3O4) and calcium phosphate (Ca10P6O25) phases was optimized subsequently. This study provides necessary information for the recovery and utilization of Fe and P from steelmaking slag, by selectively precipitating Fe and P rich phases.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Steelwork, Slag , Magnetite, Calcium phosphate, Nucleation | |||||||||||||||
Journal or Publication Title: | International Journal of Minerals, Metallurgy and Materials | |||||||||||||||
Publisher: | Springer | |||||||||||||||
ISSN: | 1674-4799 | |||||||||||||||
Official Date: | February 2023 | |||||||||||||||
Dates: |
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Volume: | 30 | |||||||||||||||
Page Range: | pp. 378-387 | |||||||||||||||
DOI: | 10.1007/s12613-022-2553-x | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Copyright Holders: | University of Science and Technology Beijing | |||||||||||||||
Date of first compliant deposit: | 3 January 2023 | |||||||||||||||
Date of first compliant Open Access: | 21 December 2023 | |||||||||||||||
RIOXX Funder/Project Grant: |
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