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Study on Carbonization Activated Binary f-CaO Phase in Steel Slag

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Abstract

In this study, binary f-CaO in steel slag was simulated and prepared. By synthesizing different proportions of binary f-CaO, the influence of carbonization on the binary f-CaO, its carbonization performance, and hydration activity were investigated. When the iron content increased, the hydration activity of binary f-CaO decreased, and the hydration rate of the CaO·0.3FeO sample (77.01%) was the lowest. The main products of binary f-CaO carbonization are cubic calcite and rod-shaped aragonite. With the progress of carbonization, the carbonization degree of binary f-CaO increased and then decreased with the increase in iron content. Among them, the carbonization rate of CaO·0.1FeO was the highest (96.91%). The carbonization can effectively react Ca2Fe2O5 in binary f-CaO to improve its carbonization degree. Finally, compared with hydration, the ability of carbonization to remove CaO was improved by 18.01%.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 52074019, 51874013).

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Authors and Affiliations

  1. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China

    Zhe Wang, Taiyue Chen & Jiaxiang Liu

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  1. Zhe Wang
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  2. Taiyue Chen
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  3. Jiaxiang Liu
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Correspondence to Jiaxiang Liu.

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The contributing editor for this article was Sharif Jahanshahi.

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Wang, Z., Chen, T. & Liu, J. Study on Carbonization Activated Binary f-CaO Phase in Steel Slag. J. Sustain. Metall. 9, 1050–1060 (2023). https://doi.org/10.1007/s40831-023-00710-4

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  • DOI: https://doi.org/10.1007/s40831-023-00710-4

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