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ABSTRACT
Coal fly ash (CFA) was used as the main object of study to prepare ash microcrystalline glass by co-sintering with metastable slag (MS) using its strong crystallization ability and sintering activity at low and medium temperatures. The effects of different material ratios on the crystalline phase composition and properties of the microcrystalline glass were discussed using various physical and chemical analysis methods in combination with mechanical properties tests. The results show that the compressive strength, density, chemical resistance and sintering densities of ash microcrystalline glass gradually increase with the increase of sintering temperature and the proportion of metastable slag. The compressive strength of the prepared ash microcrystalline glass can meet the requirements of GB/T19766–2016 “Natural Marble Building Panel” (≥50 MPa) when the addition amount of fly ash is 10–40% and the sintering temperature is 850–1085°C; among them, the chemical corrosion resistance of the prepared product meets the industrial requirements when the addition amount of fly ash is 10–30% and the sintering temperature is 940°C (acid loss rate ≤ 96%, alkali loss rate ≤ 98%).
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No potential conflict of interest was reported by the author(s).
Supplementary material
Supplemental data for this article can be accessed online at https://doi.org/10.1080/15567036.2024.2382913
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Notes on contributors
Lei Chai
Lei Chai graduated from Zhejiang University with a major in Power Engineering. He is employed at Huadian Electric Power Research Institute Co., Ltd. His research interests include the resource utilization of solid waste and the development of environmental protection technology.
Tian Yue
Tian Yue graduated from Hebei University of Technology with a major in Energy and Power Engineering. His research interests focus on the resource utilization of solid waste and the harmless disposal of solid waste.
Qiang Liu
Qiang Liu graduated from North China Electric Power University with a major in Power Engineering.He is employed at Huadian Electric Power Research Institute Co., Ltd. His research interests include the disposal of power plant waste gases and solid wastes.
Jianping Jiang
Dr. Jianping Jiang graduated from Zhejiang University with a major in Power Engineering. He serves as the director of the Boiler Environmental Protection and Chemical Research Center at Huadian Electric Power Research Institute Co., Ltd. His research interests include carbon capture and the development of environmental protection equipment technology.
Pengcheng Zhao
Pengcheng Zhao is studying at Hebei University of Technology. His research interest lies in the comprehensive disposal of solid waste.
Zhikun Zhang
Zhikun Zhang is studying at Hebei University of Technology. His research interest is in the resource utilization of solid waste.
Yue Zhu
Yue Zhu serves as the Director of the Boiler Environmental Protection and Chemical Research Center at Huadian Electric Power Research Institute Co., Ltd. His research interests include the development and application of environmental protection technology and the development of boiler combustion technology.
Boxiong Shen
Boxiong Shen is the Dean of the School of Energy and Environmental Engineering at Hebei University of Technology. His research interests include the resource utilization of solid waste and CO control and removal.
Xing Yin
Xing Yin serves as the Director of the Production Technology Department at Hebei Huadian Shijiazhuang Yuhua Thermal Power Co., Ltd. His research interests include comprehensive treatment of waste gases and comprehensive treatment of wastewater.