Thermodynamic Model for MnO-containing Slags and Gas-Slag-Metal Equilibrium in Ferromanganese Smelting
Laughlin, David E.
The thermodynamics of MnO-containing slags was reviewed, and the properties of such slags were correlated by application of the cell model. This model, together with a previously developed unified interaction parameter model for the metal phase, was used to simulate the gas-slag-metal conditions in the hearth of a ferromanganese submerged arc furnace. The calculated slag and metal compositions and distribution of Mn, Si, and K between slag, metal, and fume were compared with plant data and satisfactory agreement was obtained. A steady recirculation of potassium inside the furnace was also predicted. For a potassium percentage in the raw materials of 0.63 pet, the amount of the recirculating potassium was about 160 kg per metric ton of ferromanganese. Due to the recirculation, the average potassium content in the solid mix coming down to the hearth could be as high as 7 pct.
L. I. Hongjie et al., "Thermodynamic Model for MnO-containing Slags and Gas-Slag-Metal Equilibrium in Ferromanganese Smelting," Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 29, no. 6, pp. 1181-1191, Springer Verlag, Dec 1998.
The definitive version is available at http://dx.doi.org/10.1007/s11663-998-0040-z
Materials Science and Engineering
Keywords and Phrases
Gases; Manganese alloys; Mathematical models; Metals; Slags; Smelting; Thermodynamic properties; Ferromanganeses; Iron alloys
International Standard Serial Number (ISSN)
Article - Journal
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