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Performance analysis of hydrogen blowing in high manganese stainless steel smelting

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Abstract

In recent years, countries around the world are researching the use of hydrogen in the field of metallurgy to reduce carbon emission. However, the application of hydrogen is limited in ironmaking and the production of nonferrous metals, which is lack in steelmaking. The insufficiency of temperature and “slag dilution” phenomenon severely restrict the high manganese stainless steel smelting in conventional process. Based on the analysis of these two problems, this paper proposes a new method of stainless steel smelting by hydrogen blowing. By the theoretical calculation, the feasibility and advantages of hydrogen blowing in high manganese stainless steel smelting are analyzed. In the first decarbonization period, the temperature of molten steel can be increased more quickly by 188 K in 20 min, reducing 1.4 t carbon emissions at the same time, or additional 7.8–9.3 t of cold charge can be added by blowing hydrogen from the side gas jet. And the activity of chromium VI in the slag can be reduced to 10–20 effectively by blowing hydrogen. In the second decarbonization period, hydrogen blowing can also control the content of dissolved oxygen in molten steel and reduce the oxidation of chromium, manganese and iron, which may succeed in inhibiting “slag dilution” phenomenon. In the reduction period, the use of hydrogen to replace argon as the stirring gas can promote the reduction of chromium oxide, manganese oxide and iron oxide in the slag and increase the final metal yield.

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The advantages of hydrogen blowing in steelmaking

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The authors gratefully acknowledge the financial support of this research by the National Natural Science Foundation of China (Grant No. 51874028), the Central Guidance on Local Science and Technology Development Fund of Hebei Province (Grant No. 216Z1009G) and the Natural Science Foundation of Hebei Province (Grant No. E2021318004).

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All authors contributed to the study conception and design. Data collection and analysis were performed by Hao Xu. All authors cooperated to prepare each version of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jianhua Liu.

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Xu, H., Liu, J., He, Y. et al. Performance analysis of hydrogen blowing in high manganese stainless steel smelting. Clean Techn Environ Policy 25, 2377–2391 (2023). https://doi.org/10.1007/s10098-023-02518-y

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  • DOI: https://doi.org/10.1007/s10098-023-02518-y

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