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Energy recovery from molten slag and exploitation of the recovered energy

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  • Bisio, G.

Abstract

A considerable amount of exergy is contained in the liquid slag tapped from blast furnaces. Relatively new processes for heat recovery from these slags are described in this paper. The slags yield a useful, dry granulated product with a glass content that depends on the process employed. Exergy in liquid and solid slags can be exploited to produce both steam and heated air. The steam may be used to generate electricity, while hot air is employed to preheat the combustion air for the blast furnace. Using a second law analysis, it is proved that the second alternative is preferred for blast-furnace slag when heated air is used for combustion in the hot blast stoves of the blast furnace.

Suggested Citation

  • Bisio, G., 1997. "Energy recovery from molten slag and exploitation of the recovered energy," Energy, Elsevier, vol. 22(5), pages 501-509.
    • Handle: RePEc:eee:energy:v:22:y:1997:i:5:p:501-509
    DOI: 10.1016/S0360-5442(96)00149-1
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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. Sun, Yongqi & Shen, Hongwei & Wang, Hao & Wang, Xidong & Zhang, Zuotai, 2014. "Experimental investigation and modeling of cooling processes of high temperature slags," Energy, Elsevier, vol. 76(C), pages 761-767.
    3. Luo, Siyi & Feng, Yu, 2016. "The production of hydrogen-rich gas by wet sludge pyrolysis using waste heat from blast-furnace slag," Energy, Elsevier, vol. 113(C), pages 845-851.
    4. 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.
    5. Bisio, G & Rubatto, G & Martini, R, 2000. "Heat transfer, energy saving and pollution control in UHP electric-arc furnaces," Energy, Elsevier, vol. 25(11), pages 1047-1066.
    6. 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).
    7. Ding, Jing & Wang, Yarong & Gu, Rong & Wang, Weilong & Lu, Jianfeng, 2019. "Thermochemical storage performance of methane reforming with carbon dioxide using high temperature slag," Applied Energy, Elsevier, vol. 250(C), pages 1270-1279.
    8. Zhang, Hui & Wang, Hong & Zhu, Xun & Qiu, Yong-Jun & Li, Kai & Chen, Rong & Liao, Qiang, 2013. "A review of waste heat recovery technologies towards molten slag in steel industry," Applied Energy, Elsevier, vol. 112(C), pages 956-966.
    9. McKenna, R.C. & Norman, J.B., 2010. "Spatial modelling of industrial heat loads and recovery potentials in the UK," Energy Policy, Elsevier, vol. 38(10), pages 5878-5891, October.
    10. Luo, Siyi & Fu, Jie & Zhou, Yangmin & Yi, Chuijie, 2017. "The production of hydrogen-rich gas by catalytic pyrolysis of biomass using waste heat from blast-furnace slag," Renewable Energy, Elsevier, vol. 101(C), pages 1030-1036.
    11. Luo, Siyi & Yi, Chuijie & Zhou, Yangmin, 2013. "Bio-oil production by pyrolysis of biomass using hot blast furnace slag," Renewable Energy, Elsevier, vol. 50(C), pages 373-377.
    12. Tan, Yu & Wang, Hong & Zhu, Xun & Lv, Yi-Wen & Ding, Yu-Dong & Liao, Qiang, 2020. "Film fragmentation mode: The most suitable way for centrifugal granulation of large flow rate molten blast slag towards high-efficiency waste heat recovery for industrialization," Applied Energy, Elsevier, vol. 276(C).
    13. Barati, M. & Esfahani, S. & Utigard, T.A., 2011. "Energy recovery from high temperature slags," Energy, Elsevier, vol. 36(9), pages 5440-5449.
    14. Wang, Hong & Wu, Jun-Jun & Zhu, Xun & Liao, Qiang & Zhao, Liang, 2016. "Energy–environment–economy evaluations of commercial scale systems for blast furnace slag treatment: Dry slag granulation vs. water quenching," Applied Energy, Elsevier, vol. 171(C), pages 314-324.
    15. Yongqi Sun & Zuotai Zhang & Lili Liu & Xidong Wang, 2014. "Multi-Stage Control of Waste Heat Recovery from High Temperature Slags Based on Time Temperature Transformation Curves," Energies, MDPI, vol. 7(3), pages 1-12, March.
    16. Mariusz Tańczuk & Maciej Masiukiewicz & Stanisław Anweiler & Robert Junga, 2018. "Technical Aspects and Energy Effects of Waste Heat Recovery from District Heating Boiler Slag," Energies, MDPI, vol. 11(4), pages 1-19, March.

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