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Article

Effects of Dust Addition on the Reactivity and High-Temperature Compressive Strength of Ferro-Coke

by
Rongrong Wang
1,2,
Siqi Li
1,
Yongsheng Yang
3,
Runsheng Xu
3,*,
Jianliang Zhang
3,*,
Yu Zeng
3,4,
Yuchen Zhang
3 and
Bin Wu
3
1
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2
Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting, University of Science and Technology Beijing, Beijing 100083, China
3
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
4
Angang Steel Company Limited, Anshan 114009, China
*
Authors to whom correspondence should be addressed.
Materials 2025, 18(24), 5637; https://doi.org/10.3390/ma18245637
Submission received: 19 November 2025 / Revised: 10 December 2025 / Accepted: 12 December 2025 / Published: 15 December 2025
(This article belongs to the Special Issue Advances in Metallurgy Technologies: Materials Preparation and Metal Recycling)
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Abstract

This study evaluated how raw-material compounding strategies affect the high-temperature compressive strength of ferro-coke. Ferro-coke was prepared using varying additions of iron-carbon-containing dust (ICD) and different gasification temperatures. High-temperature experiments were conducted to study the reactivity (CRI) and hot strength of ferro-coke, and fracture morphologies were examined by microscopy and Micro-CT. The results show that both the increase in ICD addition amount and gasification temperature would increase the reactivity and decrease the high temperature of ferro-coke. As ICD addition increased from 5% to 20%, the reactivity of the ferro-coke rose from 58.70% to 76.32%, and high-temperature strength decreased from 3260 N to 1954 N at 800 °C. This trend is attributed to catalytic components in ICD (e.g., Fe, Zn), which would accelerate gasification, increase porosity, and reduce high-temperature strength. Similarly, increasing the gasification temperature from 1000 °C to 1200 °C enhanced reactivity from 51.95% to 65.51%, but the hot strength was reduced. The higher carbon gasification rate at elevated temperature increases porosity and weakens the coke matrix, lowering compressive strength.
Keywords: iron-carbon-containing dust (ICD); ferro-coke; reactivity; high-temperature compressive strength; pore structure iron-carbon-containing dust (ICD); ferro-coke; reactivity; high-temperature compressive strength; pore structure

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MDPI and ACS Style

Wang, R.; Li, S.; Yang, Y.; Xu, R.; Zhang, J.; Zeng, Y.; Zhang, Y.; Wu, B. Effects of Dust Addition on the Reactivity and High-Temperature Compressive Strength of Ferro-Coke. Materials 2025, 18, 5637. https://doi.org/10.3390/ma18245637

AMA Style

Wang R, Li S, Yang Y, Xu R, Zhang J, Zeng Y, Zhang Y, Wu B. Effects of Dust Addition on the Reactivity and High-Temperature Compressive Strength of Ferro-Coke. Materials. 2025; 18(24):5637. https://doi.org/10.3390/ma18245637

Chicago/Turabian Style

Wang, Rongrong, Siqi Li, Yongsheng Yang, Runsheng Xu, Jianliang Zhang, Yu Zeng, Yuchen Zhang, and Bin Wu. 2025. "Effects of Dust Addition on the Reactivity and High-Temperature Compressive Strength of Ferro-Coke" Materials 18, no. 24: 5637. https://doi.org/10.3390/ma18245637

APA Style

Wang, R., Li, S., Yang, Y., Xu, R., Zhang, J., Zeng, Y., Zhang, Y., & Wu, B. (2025). Effects of Dust Addition on the Reactivity and High-Temperature Compressive Strength of Ferro-Coke. Materials, 18(24), 5637. https://doi.org/10.3390/ma18245637

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