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Abstract
Exergy-based efficiency analysis provides a powerful tool for optimizing industrial processes. In this article, the use of this technique for pyrometallurgical applications is explored in four steps. First, the exergy concept is introduced, the outline of exergy calculations is presented, and the role of a reference state is discussed. Second, it is shown that an unambiguous exergy calculation for pyrometallurgical streams with a complex, unknown phase composition is not straightforward. Hence, a practical methodology is proposed in which a suitable phase-based stream description is estimated prior to the actual exergy calculation. For this, the equilibrium phase composition is calculated, whereas all known stream properties are incorporated as boundary conditions. Third, the proposed methodology is validated by recalculating literature results. This reveals significant deviations for exergy values of the same pyrometallurgical streams. Our results are probably more accurate because of the incorporation of additional phase-related information. And fourth, a full analysis of a zinc-recycling process is presented. In a base case scenario, the total exergetic efficiency turns out to be only 1.2 pct. Based on this result, different process modifications are suggested and evaluated quantitatively. We find that significant efficiency gains are possible.
Keywords
ZINC-BEARING RESIDUES, ELECTRIC-ARC FURNACE, BLAST-FURNACE, RESOURCE EFFICIENCY, ENERGY, LOSSES, SLAG, RECOVERY, QUALITY, METAL

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Please use this url to cite or link to this publication:

Chicago
Klaasen, Bart, Peter-Tom Jones, Dirk Durinck, Jo Dewulf, Patrick Wollants, and Bart Blanpain. 2010. “Exergy-based Efficiency Analysis of Pyrometallurgical Processes.” Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science 41 (6): 1205–1219.
APA
Klaasen, Bart, Jones, P.-T., Durinck, D., Dewulf, J., Wollants, P., & Blanpain, B. (2010). Exergy-based efficiency analysis of pyrometallurgical processes. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 41(6), 1205–1219.
Vancouver
1.
Klaasen B, Jones P-T, Durinck D, Dewulf J, Wollants P, Blanpain B. Exergy-based efficiency analysis of pyrometallurgical processes. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE. 2010;41(6):1205–19.
MLA
Klaasen, Bart, Peter-Tom Jones, Dirk Durinck, et al. “Exergy-based Efficiency Analysis of Pyrometallurgical Processes.” METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 41.6 (2010): 1205–1219. Print.
@article{2042378,
  abstract     = {Exergy-based efficiency analysis provides a powerful tool for optimizing industrial processes. In this article, the use of this technique for pyrometallurgical applications is explored in four steps. First, the exergy concept is introduced, the outline of exergy calculations is presented, and the role of a reference state is discussed. Second, it is shown that an unambiguous exergy calculation for pyrometallurgical streams with a complex, unknown phase composition is not straightforward. Hence, a practical methodology is proposed in which a suitable phase-based stream description is estimated prior to the actual exergy calculation. For this, the equilibrium phase composition is calculated, whereas all known stream properties are incorporated as boundary conditions. Third, the proposed methodology is validated by recalculating literature results. This reveals significant deviations for exergy values of the same pyrometallurgical streams. Our results are probably more accurate because of the incorporation of additional phase-related information. And fourth, a full analysis of a zinc-recycling process is presented. In a base case scenario, the total exergetic efficiency turns out to be only 1.2 pct. Based on this result, different process modifications are suggested and evaluated quantitatively. We find that significant efficiency gains are possible.},
  author       = {Klaasen, Bart and Jones, Peter-Tom and Durinck, Dirk and Dewulf, Jo and Wollants, Patrick and Blanpain, Bart},
  issn         = {1073-5615},
  journal      = {METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE},
  keyword      = {ZINC-BEARING RESIDUES,ELECTRIC-ARC FURNACE,BLAST-FURNACE,RESOURCE EFFICIENCY,ENERGY,LOSSES,SLAG,RECOVERY,QUALITY,METAL},
  language     = {eng},
  number       = {6},
  pages        = {1205--1219},
  title        = {Exergy-based efficiency analysis of pyrometallurgical processes},
  url          = {http://dx.doi.org/10.1007/s11663-010-9424-y},
  volume       = {41},
  year         = {2010},
}

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