Slag Properties in the Primary Production Process of Mn-Ferroalloys.
Peer reviewed, Journal article
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Date
2021Metadata
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Original version
Tangstad, M., Bublik, S., Haghdani, S. et al. Slag Properties in the Primary Production Process of Mn-Ferroalloys. Metall Mater Trans B 52, 3688–3707 (2021). https://doi.org/10.1007/s11663-021-02347-8 10.1007/s11663-021-02323-2Abstract
The thermodynamic and kinetic properties of the carbothermic reduction of MnO in the five-component slag, MnO-SiO2-CaO-MgO-Al2O3, is critical in the production process of Mn-ferroalloys. While the reduction rate is mainly dependent on the presence of a solid MnO phase in the slag for Mn-Fe-alloys, the rate for the Mn-Si-Fe alloys has two distinct steps, a slow step followed by a fast step. The extent of the slow step has been shown to be dependent on the S content in the slag. The thermo-physical properties of viscosity, density, interfacial tension and electrical resistivity is reviewed, and these properties are mainly determined by the total basicity.