Materials Properties and Liquid Flow in the Hearth of the Experimental Blast Furnace
Abstract
:1. Introduction
2. Methodology
2.1. EBF Campaign 32
2.2. Copper Injection in the End of EBF Campaign 32
2.3. Collection of Samples from the EBF Hearth
2.4. Analysis of the Samples
3. Results and Discussion
3.1. Properties of the Coke
3.2. Properties of the Slag
3.3. Properties of the Metal
3.4. Properties of the Aggregates
3.5. Properties of the Materials along the Flow Field in the EBF Hearth
3.6. Hearth Conditions before Quenching of the EBF
4. Conclusions
- Alkali in the coke and slag, ash contents in the coke and basicity of the slag show vertical and radial variations in the hearth; higher alkali in the coke and slag, higher ash content in the coke and lower basicity (wt.%CaO/wt.%SiO2) in the slag were found in the close-to-wall region and the lower part of the hearth.
- The chemistries of the hot metal, slag, and coke were found to vary slightly along the liquid flow field.
- There exists an area beneath and in front of tuyere 3, where the flow resistance of the liquid is high.
- The flow resistance contributed to the formation of a cold zone in the close-to-wall region and at the bottom of the EBF hearth. The division of the cold zone and hot zone has significant impacts on the chemical properties of the materials in the EBF hearth, as well as on the radial and vertical distributions of certain elements/components in the hearth materials.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
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MPBO Pellets | Pulverized Coal | Coke | Quartzite | BOF Slag (from SSAB) | Limestone |
---|---|---|---|---|---|
1380 | 130 | 420 | 18-22 | 40-45 | 40 |
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Hu, X.; Sundqvist Ökvist, L.; Ölund, M. Materials Properties and Liquid Flow in the Hearth of the Experimental Blast Furnace. Metals 2019, 9, 572. https://doi.org/10.3390/met9050572
Hu X, Sundqvist Ökvist L, Ölund M. Materials Properties and Liquid Flow in the Hearth of the Experimental Blast Furnace. Metals. 2019; 9(5):572. https://doi.org/10.3390/met9050572
Chicago/Turabian StyleHu, Xianfeng, Lena Sundqvist Ökvist, and Martin Ölund. 2019. "Materials Properties and Liquid Flow in the Hearth of the Experimental Blast Furnace" Metals 9, no. 5: 572. https://doi.org/10.3390/met9050572