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Optimization of Cyclone-Type Rotary Kiln Reactor for Carbonation of BOF Slag

Author

Listed:
  • Ming-Sheng Ko

    (Department of Materials & Mineral Resources Engineering, National Taipei University of Technology, Taipei 106344, Taiwan)

  • Tong-Bou Chang

    (Department of Mechanical and Energy Engineering, National Chiayi University, Chiayi 600355, Taiwan)

  • Cho-Yu Lee

    (Department of Mechanical Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung 804201, Taiwan)

  • Jhong-Wei Huang

    (Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan 71005, Taiwan)

  • Chin-Fong Lim

    (Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan 71005, Taiwan)

Abstract

Mineral carbonation of the basic oxygen furnace (BOF) slag produced in the steel-making process not only provides an effective approach for carbon dioxide storage, but also stabilizes the slag such that it can be reused as a construction material. Generally speaking, carbonation performance improves as the time for which the carbon dioxide resides within the reactor increases. This research proposes a method to increase the residence time of carbon dioxide in the cyclone converter slag carbonization kiln by adjusting the inclination angle and length of the feed pipe. Therefore, it has the same effect of increasing the flow path length of the cyclone in the reactor. The optimal values of the inclination angle and length of the gas inlet tube are determined using the robust Taguchi design method. Computational fluid dynamics simulation results show that the optimized reactor design increases the average residence time of carbon dioxide gas by 60.4%, compared with the original rotating reactor design with a straight (non-cyclonic) flow path. Moreover, the experimental results show that the optimized design increases the carbon dioxide storage capacity from 12.15 g per kilogram of BOF slag in the original rotary kiln reactor to 16.00 g in the re-designed reactor.

Suggested Citation

  • Ming-Sheng Ko & Tong-Bou Chang & Cho-Yu Lee & Jhong-Wei Huang & Chin-Fong Lim, 2021. "Optimization of Cyclone-Type Rotary Kiln Reactor for Carbonation of BOF Slag," Sustainability, MDPI, vol. 13(20), pages 1-11, October.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:20:p:11556-:d:660042
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    References listed on IDEAS

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    1. Pan, Shu-Yuan & Lorente Lafuente, Ana Maria & Chiang, Pen-Chi, 2016. "Engineering, environmental and economic performance evaluation of high-gravity carbonation process for carbon capture and utilization," Applied Energy, Elsevier, vol. 170(C), pages 269-277.
    2. 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.
    3. Pan, Shu-Yuan & Chiang, Pen-Chi & Chen, Yi-Hung & Tan, Chung-Sung & Chang, E.-E., 2014. "Kinetics of carbonation reaction of basic oxygen furnace slags in a rotating packed bed using the surface coverage model: Maximization of carbonation conversion," Applied Energy, Elsevier, vol. 113(C), pages 267-276.
    4. Pan, Shu-Yuan & Eleazar, Elisa G. & Chang, E-E & Lin, Yi-Pin & Kim, Hyunook & Chiang, Pen-Chi, 2015. "Systematic approach to determination of optimum gas-phase mass transfer rate for high-gravity carbonation process of steelmaking slags in a rotating packed bed," Applied Energy, Elsevier, vol. 148(C), pages 23-31.
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    Cited by:

    1. Jiří Bojanovský & Vítězslav Máša & Igor Hudák & Pavel Skryja & Josef Hopjan, 2022. "Rotary Kiln, a Unit on the Border of the Process and Energy Industry—Current State and Perspectives," Sustainability, MDPI, vol. 14(21), pages 1-34, October.

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