Carburization Behavior of High-Grade Pellets After Direct Reduction in Pure Hydrogen

IF 2.5 3区 材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Angelo Perrone, Pasquale Cavaliere, Behzad Sadeghi, L. Dijon, A. Laska, D. Koszelow
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Abstract

Carburization is a critical aspect in the iron and steel industry as it significantly affects the mechanical and chemical properties of the final product. This study provides a comprehensive analysis of the carburization potential of high-grade quality iron ore pellets after direct reduction in pure hydrogen. The results show that the porosity of the pellets has a significant impact on the efficiency and success of the direct reduction process with hydrogen. The reduction process can be completed at a lower temperature in pure hydrogen compared to carbon monoxide, with the iron carbide concentration peaking at temperatures up to 500 °C before decreasing with further temperature increases. The uniform distribution of SiO2, Al2O3, and CaO is critical to the carburizing process and affects the final properties of the steel. An increased degree of metallization and porosity are associated with an improved carburizing tendency. This study highlights the intricate interplay between temperature, carbon sources, and the resulting equilibrium concentration of iron carbides and provides insights into the complex dynamics of this phenomenon.

Graphical Abstract

Abstract Image

在纯氢气中直接还原后高级别颗粒的渗碳行为
渗碳是钢铁工业的一个关键环节,因为它对最终产品的机械和化学特性有重大影响。本研究全面分析了高品位优质铁矿球团在纯氢中直接还原后的渗碳潜力。结果表明,球团的孔隙率对氢气直接还原过程的效率和成功率有重大影响。与一氧化碳相比,纯氢中的还原过程可以在较低的温度下完成,碳化铁浓度在温度达到 500 °C 时达到峰值,然后随着温度的进一步升高而降低。SiO2、Al2O3 和 CaO 的均匀分布对渗碳过程至关重要,并影响钢的最终性能。金属化程度和孔隙率的增加与渗碳倾向的改善有关。这项研究强调了温度、碳源和由此产生的碳化铁平衡浓度之间错综复杂的相互作用,并为这一现象的复杂动态提供了见解。
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来源期刊
Journal of Sustainable Metallurgy
Journal of Sustainable Metallurgy Materials Science-Metals and Alloys
CiteScore
4.00
自引率
12.50%
发文量
151
期刊介绍: Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.
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