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Facile and Economical Preparation of SiAlON-Based Composites Using Coal Gangue: From Fundamental to Industrial Application

Author

Listed:
  • Jinfu Li

    (Department of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China)

  • Changsheng Yue

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

  • Mei Zhang

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

  • Xidong Wang

    (Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing 100871, China)

  • Zuotai Zhang

    (Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing 100871, China)

Abstract

The present study aims to synthesize SiAlON-based composites utilizing coal gangue. Different types of SiAlON-based composites were synthesized using coal gangue by carbothermal reduction nitridation method through control of different reaction atmospheres. The experimental results indicate that the oxygen partial pressure was an essential factor in the manufacture of SiAlON-based composites and under proper control of the atmospheres, SiAlON-based composites with different crystal structures could be synthesized. The optimum conditions of synthesis of different SiAlON-based composites were respectively determined. Based on the laboratory results, a prototype plant was proposed and constructed, and β-SiAlON composite was successfully produced using coal gangue. The synthesized β-SiAlON composite was applied in preparation of iron ladle brick instead of SiC, which showed that the compression strength, refractoriness under load and high temperature bending strength were increased from 44.5 ± 6.7 MPa, 1618 ± 21 °C and 5.4 ± 1.2 MPa to 64.1 ± 2.5 MPa, 1700 ± 28 °C and 7.1 ± 1.6 MPa, respectively. Compared with the traditional synthesis method, the present technique is expected to save energy both in raw materials and technical process.

Suggested Citation

  • Jinfu Li & Changsheng Yue & Mei Zhang & Xidong Wang & Zuotai Zhang, 2015. "Facile and Economical Preparation of SiAlON-Based Composites Using Coal Gangue: From Fundamental to Industrial Application," Energies, MDPI, vol. 8(7), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:7:p:7428-7440:d:52959
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    References listed on IDEAS

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    1. I-Wei Chen & Anatoly Rosenflanz, 1997. "A tough SiAlON ceramic based on α-Si3N4 with a whisker-like microstructure," Nature, Nature, vol. 389(6652), pages 701-704, October.
    2. AfDB AfDB, . "Annual Report 2012," Annual Report, African Development Bank, number 461.
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    Cited by:

    1. Jiuping Xu & Lurong Fan & Chengwei Lv, 2017. "Equilibrium Strategy Based Recycling Facility Site Selection towards Mitigating Coal Gangue Contamination," Sustainability, MDPI, vol. 9(2), pages 1-27, February.

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