Competitive Oxidation of O2 and CO2 in Fe–C Melts Using Isotope Tracing Method,Steel Research International

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Competitive Oxidation of O2 and CO2 in Fe–C Melts Using Isotope Tracing Method
Steel Research International ( IF 1.9 ) Pub Date : 2020-06-02 , DOI: 10.1002/srin.202000127
Yuewen Fan ₁ , Xiaojun Hu ₁ , Rong Zhu ₂ , Kuochih Chou ₁

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The application of an O₂–CO₂ mixture gas in the steel industry makes an important contribution to energy savings and emissions reduction. To clarify the reaction mechanisms of this gas mixture, isotope gases (¹⁸O₂ and ¹³CO₂) are used to study the competitive oxidation of O₂ and CO₂, for Fe–C melts at 1873 K. Changes in gas mix composition during the decarburization of Fe–C melts with O₂–CO₂ are monitored using an online mass spectrometer. The results show that when the O₂/CO₂ ratio at the inlet is 4:1, the O₂ oxidation rate is approximately four times that of CO₂. O₂ and CO₂ decarburization abilities are found to be basically the same, even when the O₂ supply is more than sufficient. As for the ability to oxidize Fe in molten steel, when the ratio of O₂/CO₂ at the inlet is 4:1, the O₂ oxidation rate is approximately seven times that of CO₂, allowing us to conclude that CO₂ is less able to compete with molten iron oxide.

中文翻译：

同位素示踪法在Fe–C熔体中竞争性氧化O2和CO2

O ₂ -CO ₂混合气体在钢铁行业中的应用为节能和减排做出了重要贡献。为了阐明这种气体混合物的反应机理，使用了同位素气体（¹⁸ O ₂和¹³ CO ₂）研究了Fe-C熔体在1873 K时O ₂和CO ₂的竞争性氧化。使用在线质谱仪监控O ₂ -CO ₂对Fe–C熔体的脱碳。结果表明，当进口处的O ₂ / CO ₂比为4：1时，O ₂氧化速率约为CO _2的四倍。发现O ₂和CO _2的脱碳能力基本相同，即使O ₂供应量足够多。至于在钢水氧化铁的能力，当澳比₂ / CO ₂在入口为4：1中，O ₂氧化率接近七倍CO的那₂，使我们能够得出结论，CO ₂是与熔融氧化铁竞争的能力较弱。

更新日期：2020-06-02

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