Effects of Raw Material Contaminants on the Ferrosilicon Melting Process in the Submerged Arc Furnace

Abstract:

Based on the Minimum Gibbs Free Enthalpy algorithm (FEM) and a model of reaction zones located around electrode tips in the submerged arc furnace, an analysis of the raw material chemical composition influence on the ferrosilicon smelting process was carried out. A model of the ferrosilicon process in the submerged arc furnace is a system of two closed isothermal reactors: an upper one with a lower temperature T₁, and a lower one with a higher temperature T₂. Between the reactors and the environment as well as between the reactors inside the system, a periodical exchange of mass occurs at the moments when the equilibrium state is reached. Based on the model, sets of calculations were performed: for a Fe-Si-O-C system and, subsequently, for a more complex Fe-Si-O-C-Al-Ca-Mg-Ti system. For both systems, the energy and mass balance values were calculated and the effects of raw material contaminants on the efficiency of the ferrosilicon melting process were determined.

• Periodical: Solid State Phenomena (Volume 212)
• Pages: 183-186
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.212.183
• Online since: December 2013
• Authors: Bolesław Machulec, Wojciech Bialik
• Keywords: Ferrosilicon, Gibbs FEM Method, Model, Submerged Arc Furnace

References

[1] A. Schei, J. Kr. Tuset, H. Tveit, Production of High Silicon Alloys, Trondheim, (1998).

[2] B. Machulec, W. Bialik, Model of the ferrosilicon melting process in the submerged arc furnace, International Conference on Innovative Technologies, IN-TECH 2012, Rijeka (2012) 287-290.

DOI: 10.4028/www.scientific.net/ssp.212.183

[3] N.K. Batra, Modelling of ferrosilicon smelting in submerged arc furnace, Iron and Steelmaking 39 (5) (2003) 399-404.

DOI: 10.1179/030192303225004088

[4] G. Eriksson, T. Johansson, Thermodynamic Studies of Chemical and Thermal Equilibrium Calculations for a Quantitative Description of a Non-Isothermal Reactor with Application to the Silicon Arc Furnace, Scandinavian Journal of Metallurgy 7 (1978).

[5] A. Roine, HSC Chemistry 7. 0 User's Guide, vol. 1/2 Chemical Reaction and Equilibrium Software with Extensive Thermochemical Database and Flow sheet Simulation, Outotec, Finland, (2007).

[6] Dhananjaya Senapati, E.V. S Uma Maheswar, C.R. Ray, Ferro silicon operation at IMFA – a critical analysis, INFACON XI, Proceedings of the International Conference, New Delhi, India (2007) 371-380.