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Experimental Verification of the Use of Free-energy Minimization Techniques for Modeling Complex Sulfide Smelting.
Ph d Dissertation Univ Mo-Rolla :105 pages
This paper describes research into the use of free-energy minimization techniques as a method for modeling complex sulfide smelting. Model results were verified experimentally by smelting a variety of sulfide concentrates using a submerged lance technique where the matte, slag, and gas phases are in virtual equilibrium. Experiments were conducted at 1,523 k. It was found that a combination of the submerged lance technique with an equilibrium computer program was a useful way for estimating activity coefficients in systems where the volatility of species such as lead and zinc and their compounds make it difficult to determine activities using conventional experimental techniques. In addition, it was found that a chemical equilibrium program using activity coefficient expressions derived from simpler systems can be applied to complex sulfide smelting to determine the distribution of elements between the matte, slag, and gas phases.
Ph.d. Dissertation, Univ. Mo-Rolla
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