Preparation of Foamed Ceramic Materials from Fly Ash and Blast Furnace Slags

LI Haiyan; ZHANG Leihua; LI Fusong

doi:10.3969/j.issn.1000-6532.2024.05.023

2024 Vol. 45, No. 5

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Article navigation > Multipurpose Utilization of Mineral Resources > 2024 > 45(5): 161-167

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LI Haiyan, ZHANG Leihua, LI Fusong. Preparation of Foamed Ceramic Materials from Fly Ash and Blast Furnace Slags[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(5): 161-167. doi: 10.3969/j.issn.1000-6532.2024.05.023

Citation:

LI Haiyan, ZHANG Leihua, LI Fusong. Preparation of Foamed Ceramic Materials from Fly Ash and Blast Furnace Slags[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(5): 161-167. doi: 10.3969/j.issn.1000-6532.2024.05.023

Preparation of Foamed Ceramic Materials from Fly Ash and Blast Furnace Slags

1.
Zhengzhou Institute of Finance and Economics, Zhengzhou 450000, Henan, China
2.
North China University of Science and Technology, Tangshan 063000, Hebei, China
3.
Taigang Group, Laiwu 271100, Shandong, China

Received Date: 18 December 2022

Publish Date: 25 October 2024

Abstract

Abstract

This is an article in the field of ceramics and composites.The high-temperature sintering method was used to prepare foamed ceramics by using fly ash and blast furnace slag as the main raw materials, adding silicon carbide (SiC) as a high temperature foaming agent and sodium borate (Na₂B₂O₇) as a flux. The effects of raw material ratio, SiC addition and Na₂B₂O₇ addition on the bubble structure, bulk density, water absorption, compressive strength and thermal conductivity of foamed ceramics were mainly studied. The experimental results showed that when the fly ash was 70%, the blast furnace slag was 30%, 0.3% SiC powder and 5% Na₂B₂O₇ were added additionally, and the sintering temperature was 1 100℃ for 40 min, the foamed ceramic had the best comprehensive properties, and its bulk density was 0.516 g/cm³, with water absorption rate of 3.82%, compressive strength of 3.62 MPa, thermal conductivity of 0.094 W/(m·K). The main phases of the sample under this condition included quartz phase (SiO₂), anorthite (CaAl₂Si₂O₈) and pyroxene phase (Ca(Mg,Al,Fe)Si₂O₆), the massive precipitation of crystals enhanced the strength of the material. This research provided a new method for converting industrial solid wastes such as fly ash and blast furnace slag into high value-added building insulation materials.
- Ceramics and composites /
- Foamed ceramics /
- Fly ash /
- Blast furnace slag /
- Bubble structure /
- Comprehensive properties

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References

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