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Preparation of Slag Wool by Integrated Waste-Heat Recovery and Resource Recycling of Molten Blast Furnace Slags: From Fundamental to Industrial Application

Author

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  • Dawei Zhao

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

  • Zuotai Zhang

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

  • Xulong Tang

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

  • Lili Liu

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

  • Xidong Wang

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

Abstract

The present paper investigated the process of the slag wool fabrication using high temperature blast furnace (BF) slag modified by coal ash (CA). The liquidus temperature and viscosity of the slag system with different mass ratios of BF slag and CA were measured through an inner cylinder rotation method. The approximate mass ratio used to fabricate the slag wool was therefore determined and slag wool was then successfully prepared with a high-speed air injection method in the laboratory. The effect of mBF/m ratio, slag temperature for injection and air pressure on the preparation of slag wool was systematically investigated. The mechanical and thermal properties were also studied to confirm the long-term working conditions of the slag wool. An industry-scale slag wool production application was established. The energy consumption and the pollutant generation, were analyzed and compared with the traditional production method, which indicated a 70% reduction in energy consumption and a 90% pollution emission decrease.

Suggested Citation

  • Dawei Zhao & Zuotai Zhang & Xulong Tang & Lili Liu & Xidong Wang, 2014. "Preparation of Slag Wool by Integrated Waste-Heat Recovery and Resource Recycling of Molten Blast Furnace Slags: From Fundamental to Industrial Application," Energies, MDPI, vol. 7(5), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:5:p:3121-3135:d:35938
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    References listed on IDEAS

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    1. Bisio, G., 1997. "Energy recovery from molten slag and exploitation of the recovered energy," Energy, Elsevier, vol. 22(5), pages 501-509.
    2. Barati, M. & Esfahani, S. & Utigard, T.A., 2011. "Energy recovery from high temperature slags," Energy, Elsevier, vol. 36(9), pages 5440-5449.
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    Cited by:

    1. Yongqi Sun & Zuotai Zhang & Lili Liu & Xidong Wang, 2015. "Heat Recovery from High Temperature Slags: A Review of Chemical Methods," Energies, MDPI, vol. 8(3), pages 1-19, March.
    2. Zhang, Huining & Dong, Jianping & Wei, Chao & Cao, Caifang & Zhang, Zuotai, 2022. "Future trend of terminal energy conservation in steelmaking plant: Integration of molten slag heat recovery-combustible gas preparation from waste plastics and CO2 emission reduction," Energy, Elsevier, vol. 239(PE).

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