Thermodynamic analysis of recovering valuable elements from steel slag by thermite reduction in converter

Cao Lei; Shi Jiahao; Gao Yuning

doi:10.7513/j.issn.1004-7638.2023.06.014

Volume 44 Issue 6

Dec. 2023

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Cao Lei, Shi Jiahao, Gao Yuning. Thermodynamic analysis of recovering valuable elements from steel slag by thermite reduction in converter[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 93-97. doi: 10.7513/j.issn.1004-7638.2023.06.014

Citation:

Cao Lei, Shi Jiahao, Gao Yuning. Thermodynamic analysis of recovering valuable elements from steel slag by thermite reduction in converter[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 93-97. doi: 10.7513/j.issn.1004-7638.2023.06.014

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Thermodynamic analysis of recovering valuable elements from steel slag by thermite reduction in converter

doi: 10.7513/j.issn.1004-7638.2023.06.014

Cao Lei^1
,,
Shi Jiahao²,
Gao Yuning^{1
,
,}

1.
Department of Materials Engineering, Hebei Polytechnic University, Shijiazhuang 050091, Hebei, China
2.
School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China

Received Date: 2023-08-31
Available Online: 2024-01-11
Publish Date: 2023-12-30

Abstract

Abstract

Aiming at recovery of valuable elements such as Fe, P, Mn and Si from Bessemer steel slag and utilization of steel slag, the thermodynamic conditions and influencing rules of thermite reduction and recovery of valuable elements from Bessemer steel slag were analyzed by a Factsage8.2 software thermodynamic calculation system. The results show that basicity of the slag has little effect on the recovery of FeO, P₂O₅ and MnO in thermite reduction, and the improvement of slag basicity is beneficial to SiO₂ recovery. The change of temperature has little effect on the recovery of FeO, P₂O₅ and MnO, but increasing temperature is not conducive to the reduction of SiO₂ in the steel slag. When the slag basicity is 3.18 and the temperature is 1873K, w(Al/Slag)=20%, the recovery of valuable elements can be achieved the relatively best effect, and the reduction rates of FeO, P₂O₅, MnO and SiO₂ in the slag are as high as 100%, 100%, 99.97% and 98.12%, respectively. These studied results can be used for the efficient recovery of valuable elements and resource utilization of steel slag by thermite reduction.
- converter steel slag,
- thermite reduction,
- valuable elements,
- recovery,
- reduction rates,
- thermodynamic conditions

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References(15)

References

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