Study on influencing factors of f-CaO and f-MgO content in steel slag

Xiwei Wang; Liqun Hu; Peien Wang

doi:10.1117/12.3015405

6 February 2024 Study on influencing factors of f-CaO and f-MgO content in steel slag

Xiwei Wang, Liqun Hu, Peien Wang

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129792F (2024) https://doi.org/10.1117/12.3015405
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

Steel slag as a large stock of bulk of industrial solid waste in our country, the current domestic of its utilization is only 30% or so. The main reason limiting the large-scale resource utilization of steel slag is that the f-CaO and f-MgO in it are easy to hydrate in water, resulting in the volume expansion of steel slag. The content of f-CaO and f-MgO in steel slag was determined by EDTA-EG method and NH4Cl-EG method. In this paper, the influence of crushing degree and accumulation height on steel slag is investigated, and the change of f-CaO and f-MgO content in steel slag with time is analyze. The results show that the content of f-CaO and f-MgO in steel slag after grinding is higher than that without grinding, and the content of f-MgO in steel slag is much smaller than that of f-CaO. The steel slag aged for three months under local climate conditions in Inner Mongolia has been basically in a chemically stable state, and the f-CaO and f-MgO in the slag will not be separated in a short period of time, indicating that it continues to participate in the hydration reaction. It is more beneficial to control the content of f-CaO and f-MgO when the steel slag accumulation height is less than 5 m.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiwei Wang, Liqun Hu, and Peien Wang "Study on influencing factors of f-CaO and f-MgO content in steel slag", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129792F (6 February 2024); https://doi.org/10.1117/12.3015405

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