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Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies pp 251–258Cite as

Influences of CaO/SiO2/MgO/Al2O3 on the Formation Behavior of FeO-Bearing Primary-Slags in Blast Furnace

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Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Slags play an important role in blast furnace operation, and their compositions are based on the CaO–SiO2–MgO–Al2O3 quaternary system. However, there is not a clear understanding of the effects of gangue on of the formation of FeO-bearing primary-slags process in blast furnace. In this work, the softening and dripping experiments under the blast furnace conditions are designed to explore the influences of CaO-/SiO2-/MgO-/Al2O3 on the softening and melting properties of FeO respectively. The results indicate that additions of CaO or Al2O3 decrease the starting softening temperature and no dripping behaviors are found in comparison with the base case results when only FeO is used. On the contrary, the addition of SiO2 or MgO rises the starting and ending softening temperature, as well as the dripping temperature. The lowest maximum pressure drop is obtained in the case with addition of SiO2. According to XRD analysis results, the initial phase with CaO addition in the primary-slags should be CaO·Fe3O4 and that with SiO2, MgO, Al2O3 additions are fayalite (2FeO·SiO2), magnesioferrite (MgO·FeO), hercynite (FeO·2Al2O3), respectively.

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Acknowledgements

The authors would like to thank the project supported by the National Natural Science Foundation of China (51304257), and the financial support from the Chongqing Research Program of Basic Research and Frontier Technology (cstc2015jcyjA50014) and National Natural Science Foundation of China (51374263) is also acknowledged.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Dongdong Wang, Kaihui Ma, Yang Xu, Jian Xu & Liangying Wen

Authors
  1. Dongdong Wang
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  2. Kaihui Ma
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  3. Yang Xu
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  4. Jian Xu
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  5. Liangying Wen
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Corresponding author

Correspondence to Jian Xu .

Editor information

Editors and Affiliations

  1. Rio Tinto Kennecott Utah Copper , Magna, Utah, USA

    Shijie Wang

  2. University of Utah , Salt Lake City, Utah, USA

    Michael L Free

  3. The University of Saskatchewan , Saskatoon, Saskatchewan, Canada

    Shafiq Alam

  4. ArcelorMittal Global R&D , Schereville, Indiana, USA

    Mingming Zhang

  5. Colorado School of Mines, George S. Ansell Chair Colorado School of Mines, Golden, Colorado, USA

    Patrick R. Taylor

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© 2017 The Minerals, Metals & Materials Society

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Wang, D., Ma, K., Xu, Y., Xu, J., Wen, L. (2017). Influences of CaO/SiO2/MgO/Al2O3 on the Formation Behavior of FeO-Bearing Primary-Slags in Blast Furnace. In: Wang, S., Free, M., Alam, S., Zhang, M., Taylor, P. (eds) Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51091-0_23

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