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Kinetic Study of the Ferrosilicon Nitriding Process

  • Metallurgical Kinetics
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Abstract

The ferrosilicon nitride used for steelmaking has been synthesized by direct nitriding. The relationship between the reaction temperature and nitriding effect was investigated. The results show that the initial reaction temperature between FeSi75 and nitrogen is approximately 900°C. Increasing holding temperature or prolonging holding time is beneficial to increase the nitrogen content in the nitrided product. At 1400°C, the nitrogen content in ferrosilicon nitride reached 30.28% when the holding time was 4 h. With the increase of nitriding reaction temperature, the phase of α-Si3N4 transferred to β-Si3N4 gradually. Pore diffusion was identified as the dominant restrictive link during the ferrosilicon nitriding process.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51604047) and the Large Instrument Foundation of Chongqing University (Grants 201712150115, 201712150036 and 201712150109).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

    Jiang Diao, Guang Wang, Zhaoqun Ke, Bing Xie & Gang Li

  2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing, 400044, People’s Republic of China

    Jiang Diao, Guang Wang, Bing Xie & Gang Li

  3. Technical Development Department, Pangang Group Company Limited, Panzhihua, 617000, People’s Republic of China

    Shaogang He

  4. State Grid Tibet Economic and Economic Research, Lhasa, 850000, People’s Republic of China

    Jiaxin Zhao

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  1. Jiang Diao
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  2. Guang Wang
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  3. Shaogang He
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  4. Zhaoqun Ke
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  5. Bing Xie
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  6. Jiaxin Zhao
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  7. Gang Li
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Correspondence to Jiang Diao.

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Diao, J., Wang, G., He, S. et al. Kinetic Study of the Ferrosilicon Nitriding Process. JOM 71, 2821–2826 (2019). https://doi.org/10.1007/s11837-019-03491-y

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  • DOI: https://doi.org/10.1007/s11837-019-03491-y

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