Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms
In light of the steel industry's rapid advancements, the availability of high-quality mineral resources is diminishing. Therefore, the recovery of iron from BOF slag is of great significance to the sustainability development. Considering the compositional characteristics of BOF slag, the transf...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423030867 |
| _version_ | 1797338335586287616 |
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| author | Lan Huang Shengli An Fang Zhang Jun Peng Yuxin Chen Xin Ping Chunheng Liu |
| author_facet | Lan Huang Shengli An Fang Zhang Jun Peng Yuxin Chen Xin Ping Chunheng Liu |
| author_sort | Lan Huang |
| collection | DOAJ |
| description | In light of the steel industry's rapid advancements, the availability of high-quality mineral resources is diminishing. Therefore, the recovery of iron from BOF slag is of great significance to the sustainability development. Considering the compositional characteristics of BOF slag, the transformation of the iron-containing phase into (Mn,Mg)yFe3-yO4 is the key step. Thus, a novel process for recovering iron resources by synergistic treatment of blast furnace slag (BFS) and BOF slag was proposed. This research employed FactSage thermodynamic simulation, XRD, SEM-EDS, XPS, and EPMA to analysis the impact of BFS addition (10–50 %), cooling methods (from water-cooling to furnace-cooling), and temperature (1400–1600 °C) on phase transformation and the RO oxidation mechanism, and the conditions of (Mn,Mg)yFe3-yO4 generation and enrichment was obtained. The results show that at BFS addition of 30 %, reaction temperature 1400 °C and furnace-cooling, the iron-containing phase (Ca2Fe2O5 and RO) was almost completely transformed into (Mn,Mg)yFe3-yO4. The oxidation mechanism of RO was formation of (Mn,Mg)yFe3-yO4 by cation diffusion. Under optimal conditions, the iron recovery rate and the grade reached 65.74 % and 32.07 %, respectively, which can be used as raw material for ironmaking. Meanwhile, the main phase of the tailing slag was β-Ca2SiO4, without f-CaO, which has the potential to be used in the cement and concrete industries with the advantages of both low cost and eco-friendly. Therefore, the process with green, efficient and low cost was provided, which is a feasible idea for the comprehensive utilization of industrial solid waste. |
| first_indexed | 2024-03-08T09:28:35Z |
| format | Article |
| id | doaj.art-1dfce6b3562249f395ba366fbb8f0767 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:35Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1dfce6b3562249f395ba366fbb8f07672024-01-31T05:43:19ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012823472362Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanismsLan Huang0Shengli An1Fang Zhang2Jun Peng3Yuxin Chen4Xin Ping5Chunheng Liu6School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, China; Corresponding author. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, China; Corresponding author. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, 014010, ChinaIn light of the steel industry's rapid advancements, the availability of high-quality mineral resources is diminishing. Therefore, the recovery of iron from BOF slag is of great significance to the sustainability development. Considering the compositional characteristics of BOF slag, the transformation of the iron-containing phase into (Mn,Mg)yFe3-yO4 is the key step. Thus, a novel process for recovering iron resources by synergistic treatment of blast furnace slag (BFS) and BOF slag was proposed. This research employed FactSage thermodynamic simulation, XRD, SEM-EDS, XPS, and EPMA to analysis the impact of BFS addition (10–50 %), cooling methods (from water-cooling to furnace-cooling), and temperature (1400–1600 °C) on phase transformation and the RO oxidation mechanism, and the conditions of (Mn,Mg)yFe3-yO4 generation and enrichment was obtained. The results show that at BFS addition of 30 %, reaction temperature 1400 °C and furnace-cooling, the iron-containing phase (Ca2Fe2O5 and RO) was almost completely transformed into (Mn,Mg)yFe3-yO4. The oxidation mechanism of RO was formation of (Mn,Mg)yFe3-yO4 by cation diffusion. Under optimal conditions, the iron recovery rate and the grade reached 65.74 % and 32.07 %, respectively, which can be used as raw material for ironmaking. Meanwhile, the main phase of the tailing slag was β-Ca2SiO4, without f-CaO, which has the potential to be used in the cement and concrete industries with the advantages of both low cost and eco-friendly. Therefore, the process with green, efficient and low cost was provided, which is a feasible idea for the comprehensive utilization of industrial solid waste.http://www.sciencedirect.com/science/article/pii/S2238785423030867Industrial BOF slagBlast furnace slagModificationPhase transformationiron recovery |
| spellingShingle | Lan Huang Shengli An Fang Zhang Jun Peng Yuxin Chen Xin Ping Chunheng Liu Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms Journal of Materials Research and Technology Industrial BOF slag Blast furnace slag Modification Phase transformation iron recovery |
| title | Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms |
| title_full | Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms |
| title_fullStr | Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms |
| title_full_unstemmed | Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms |
| title_short | Synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron: Phase transformation and oxidation mechanisms |
| title_sort | synergistic treatment of blast furnace slag and basic oxygen furnace slag for efficient recovery of iron phase transformation and oxidation mechanisms |
| topic | Industrial BOF slag Blast furnace slag Modification Phase transformation iron recovery |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423030867 |
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