CO Desorption and Absorption in Molten Steel: A Review

Liu, Zhuangzhuang; Jones, Peter Tom; Blanpain, Bart; Guo, Muxing

doi:10.2355/isijinternational.isijint-2020-509

ISIJ Int.

2021

DOI: 10.2355/isijinternational.isijint-2020-509

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CO Desorption and Absorption in Molten Steel: A Review

Zhuangzhuang Liu

Peter Tom Jones

Bart Blanpain

et al.

Abstract: Previous work on the mechanism of carbon monoxide absorption and desorption from liquid steel/iron is reviewed. The experimental setup employed in these studies is summarized and the characteristics of each methodology are discussed and compared. The reaction kinetics, particularly the rate-limiting step of the CO gas-molten steel/iron reaction is analysed with respect to experimental parameters, comprising temperature, CO partial pressure in the gas mixture, gas flow rate, crucible materials, and carbon and o… Show more

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Cited by 3 publications

References 60 publications

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Production of Nitrogen‐Alloyed Stainless Steels in Argon Oxygen Decarburization Converter: Kinetics and Modeling of Nitrogenation and Denitrogenation

Pitkälä,

Holappa,

Jokilaakso

2023

steel research int.

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The study aims to comprehend the behavior of nitrogen in the argon oxygen decarburization (AOD) process during the production of nitrogen‐alloyed stainless steels, where the precise adjustment of nitrogen content plays a crucial role in enhancing productivity. Furthermore, the objective is to investigate the rate of change in nitrogen content when blowing a mixture of nitrogen and argon, instead of using pure nitrogen or argon alone. Hence, both nitrogenation and denitrogenation cases are examined, and kinetic models are developed. While solution thermodynamics can predict the final nitrogen content, the kinetics are influenced by the gas flow rate, steel temperature and composition, and levels of the surface active elements in the steel. By integrating a previously developed thermodynamic equilibrium equation with the kinetic models, nitrogen contents in the range of 0.150–0.400% can be reliably predicted. Consequently, the equations can be applied to predict nitrogen content during both the nitrogenation and denitrogenation stages in the reduction and desulfurization phases of the AOD process.

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Production of Nitrogen‐Alloyed Stainless Steels in Argon Oxygen Decarburization Converter: Kinetics and Modeling of Nitrogenation and Denitrogenation

Pitkälä,

Holappa,

Jokilaakso

2023

steel research int.

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Real-Time Analysis of 18O2-13CO2 Mixed Gas Decarburization Mechanism by Online Mass Spectrometry

Fan

Zhu

et al. 2022

JOM

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Decarburization Kinetics of Fe–C Melt with CO<sub>2</sub>–O<sub>2</sub> Mixed Gas by Isotope Tracing Method

Fan

Matsuura

et al. 2023

ISIJ Int.

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The partial substitution of O 2 with CO 2 in steelmaking process is an important technology to reduce CO 2 emission and recycle. In order to improve CO 2 -O 2 decarburization utilization, the decarburization kinetics of Fe-C melt with CO 2 -O 2 mixed gas have been studied using 13 CO 2 -18 O 2 dual isotope tracing method and established the decarburization kinetic model. The results show that less than 40% of the oxygen is partially replaced by CO 2 , which improves the O 2 utilization involved in the decarburization reaction and the CO 2 utilization is still more than 80%. For the rate limiting steps, regarding O 2 , it is governed by the mixed control mechanism involving gas-phase mass transfer and interfacial chemical reaction; regarding CO 2 , with the increase of CO 2 partial pressure, the rate limiting step changes from the mixed control to gas-phase mass transfer control only. As bath temperature increase from 1723 to 1873 K, the overall decarburization rate increases; bath temperature mainly affects O 2 decarburization rates, whereas, the rates of CO 2 are not significantly affected. The apparent activation energy of CO 2 -O 2 mixed gas decarburization is 21.5 kJ•mol -1 .

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CO Desorption and Absorption in Molten Steel: A Review

Cited by 3 publications

References 60 publications

Production of Nitrogen‐Alloyed Stainless Steels in Argon Oxygen Decarburization Converter: Kinetics and Modeling of Nitrogenation and Denitrogenation

Production of Nitrogen‐Alloyed Stainless Steels in Argon Oxygen Decarburization Converter: Kinetics and Modeling of Nitrogenation and Denitrogenation

Real-Time Analysis of 18O2-13CO2 Mixed Gas Decarburization Mechanism by Online Mass Spectrometry

Decarburization Kinetics of Fe–C Melt with CO<sub>2</sub>–O<sub>2</sub> Mixed Gas by Isotope Tracing Method

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