Utilization of carbon dioxide injection in BOF–RH steelmaking process

Han, Baochen; Wei, Guangsheng; Zhu, Rong; Wu, Weijie; Jiang, Juanjuan; Feng, Chao; Dong, Jianfeng; Hu, Shaoyan; Liu, R.Z.

doi:10.1016/j.jcou.2019.05.038

Cited by 41 publications

(15 citation statements)

References 60 publications

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“…The continuous increase in greenhouse gas emissions from human activities is the primary cause of global warming, and carbon dioxide accounts for over 75% of the produced greenhouse gases. 1 In 2018, the European Commission announced that global warming has exceeded preindustrial levels by 1°C and is increasing at a rate of 0.2°C per year. Consequently, without international climate action, the global temperature could increase by 2°C by 2060.…”

Section: Introductionmentioning

confidence: 99%

Prospects for green steelmaking technology with low carbon emissions in China

Fucheng,

Lukuo,

Ying

2024

Carbon Energy

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The steel industry is a major source of CO2 emissions, and thus, the mitigation of carbon emissions is the most pressing challenge in this sector. In this paper, international environmental governance in the steel industry is reviewed, and the current state of development of low‐carbon technologies is discussed. Additionally, low‐carbon pathways for the steel industry at the current time are proposed, emphasizing prevention and treatment strategies. Furthermore, the prospects of low‐carbon technologies are explored from the perspective of transitioning the energy structure to a “carbon–electricity–hydrogen” relationship. Overall, steel enterprises should adopt hydrogen‐rich metallurgical technologies that are compatible with current needs and process flows in the short term, based on the carbon substitution with hydrogen (prevention) and the CCU (CO2 capture and utilization) concepts (treatment). Additionally, the capture and utilization of CO2 for steelmaking, which can assist in achieving short‐term emission reduction targets but is not a long‐term solution, is discussed. In conclusion, in the long term, the carbon metallurgical process should be gradually supplanted by a hydrogen–electric synergistic approach, thus transforming the energy structure of existing steelmaking processes and attaining near‐zero carbon emission steelmaking technology.

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Section: Introductionmentioning

confidence: 99%

Prospects for green steelmaking technology with low carbon emissions in China

Fucheng,

Lukuo,

Ying

2024

Carbon Energy

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“…GAS injection technology has been widely adopted in steelmaking reactors such as ladle, [1][2][3] Ruhrstahl-Heraeus (RH), [4] tundish, [5,6] and mold. [7,8] As gas-driven metallurgical equipment, RH vacuum degasser is of enormous importance in the secondary refining process of ultra-low carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Modeling of Two-Phase Flow in the Industrial Ruhrstahl–Heraeus Degasser: Effect of Bubble Expansion Models

Chen

2021

Metall Mater Trans B

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In an industrial Ruhrstahl-Heraeus (RH) degasser, gas bubbles can expand rapidly due to heating by the melt as well as to the significant pressure drop when they rise in the melt. A suitable model for the bubble expansion is, therefore, essential for the accurate numerical prediction of argon-melt hydrodynamics in an RH degasser. This study focuses on the evaluation and comparison of different bubble expansion models available in the literature based on a coupled computational fluid dynamics-population balance model. The simulation results show that compared with the measured results, the modified Szekely-Martins model demonstrates the suitability for treating the bubble expansion behavior and thereby simulating the argon-melt hydrodynamics in an industrial RH degasser. The flow field and bubble expansion, breakup, and coalescence phenomena are then investigated.

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“…6 Emission reduction and recycling of carbon dioxide in metallurgical processes have become more prominent and urgent. 7 In recent years, Zhu and co-workers [7][8][9] conducted a series of industrial experiments to study the CO 2 -O 2 mixed injection (COMI) process in the basic oxygen furnace (BOF). It was found that the dust generation rate of the COMI process was reduced by about 19.3%, and the dephosphorization rate was increased by 7.53-13.39%, compared with the conventional steelmaking process.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Mechanism During Pyrometallurgical Vanadium Extraction Process Using CO2-Containing Gas

You

et al. 2021

JOM

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In the present work, the oxidation characterization and mechanism of vanadium extraction by bottom injection of CO 2 were investigated based on laboratory experiments and pilot tests. In addition, variations of the compositions of all stable phases including gas, hot metal, slag, and spinel during the vanadium extraction process through injecting pure O 2 , 15 vol.% CO 2 -85 vol.% O 2 , and 30 vol.% CO 2 -70 vol.% O 2 gases were simulated based on the recently optimized vanadium-containing oxides database stored in FactSage software. As a consequence, oxidation of vanadium by CO 2 was an apparent secondorder reaction. Transformation of dissolved vanadium to vanadium-containing spinel can be enhanced with bottom injection of 15 vol.% CO 2 -85 vol.% O 2 into the hot metal. With the increase of bottom injected CO 2 from 15 vol.% to 30 vol.%, the oxidation of dissolved vanadium could be restrained due to the reduction of oxygen potential originating from partial replacement of O 2 by CO 2 .

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Utilization of carbon dioxide injection in BOF–RH steelmaking process

Cited by 41 publications

References 60 publications

Prospects for green steelmaking technology with low carbon emissions in China

Prospects for green steelmaking technology with low carbon emissions in China

Hydrodynamic Modeling of Two-Phase Flow in the Industrial Ruhrstahl–Heraeus Degasser: Effect of Bubble Expansion Models

Oxidation Mechanism During Pyrometallurgical Vanadium Extraction Process Using CO2-Containing Gas

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