Production of Si-Al-Fe Alloy with Carbothermal Reduction of Coal Fly Ash

Abstract:

In this study, production of Si-Al-Fe alloy with coal fly ash and bauxite as the major raw materials in the induction furnace at high temperatures were studied. The results show that carbothermal reduction of mixture of coal fly ash, bauxite, hematite, silica and CaF₂ in the induction furnace can produce Si-Al-Fe alloy, and it can therefore improve the utilization value of fly ash and reduce its pollution to the environment. The reduced alloy phase mainly contains ~23% Si, ~19% Al and ~52% Fe, and small amounts of P and S. The main phases of alloy are Al_0.5Fe₃Si_0.5, FeSi, SiC, Si₅C₃, FeC, and TiC.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 1808-1811
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.1808
• Online since: July 2011
• Authors: Guo Jun Ma, Yi Biao Jin, Da Bin Yang
• Keywords: Carbothermal Reduction, Fly Ash (FA), Si-Al-Fe Alloy

References

[1] Y. Wang, F. Zheng: Energy Saving and Environmental Protection 7(2005), p.43(in Chinese).

[2] L. Wang, X. Zhu: Beijing Energy Saving 4(1999), p.4(in Chinese).

[3] M. Zhang, Z. qiu, W. Ding, S. Jia, Y. Niu, Y. Song: Coal Conversion Vol. 15(1992), p.87(in Chinese).

[4] H. Jiang, S. Shun, L. Zhang: Ferroalloy 3(2003), p.26(in Chinese).

[5] Y. Wang, N. Feng, J. You, D. Yang: The Chinese Journal of Process Engineering Vol. 9(2009), p.531(in Chinese).

[6] A. Bao: Ferroalloy 6(1996), p.20(in Chinese).