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Predictive thermochemistry and phase equilibria of slags


It is well understood that the efficient recovery of values by pyrometallurgical processing of ores requires control of the slag chemistry. In an effort to improve the understanding of slags, a thermodynamic database on subsystems of the CaO-MgO-Fe-O-Al2O3-SiO2 system has been generated through critical assessment of the literature. Data for connecting systems of specific industrial interest are being added. The data can be combined using well-established thermodynamic principles to make calculations on the multicomponent systems of practical interest. Following a description of the calculations, this article illustrates specific applications of thermodynamic modeling to the extraction of copper, nickel, and precious metals; zinc extraction; purification of pig iron; meltdown in nuclear reactors; hot corrosion; and pollution control.

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Correspondence to Thomas I. Barry Ph.D..

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Barry, T.I., Dinsdale, A.T. & Gisby, J.A. Predictive thermochemistry and phase equilibria of slags. JOM 45, 32–38 (1993).

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  • Gibbs Energy
  • Liquid Iron
  • Excess Gibbs Energy
  • National Physical Laboratory
  • Tridymite