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| Ellinghamdiagram× | Shrinking Core Model× | |
|---|---|---|
| Ämnesområde | Gruvteknik | Gruvteknik |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1944 | 1976 |
| Upphovsperson≠ | Harold Jeffrey Torreyson Ellingham | Szekely, Evans, and Sohn |
| Typ≠ | Gibbs free energy diagram for high-temperature reactions | Reaction kinetics model for solid-fluid reactions |
| Ursprungskälla≠ | Ellingham, H. J. T. (1944). Reducibility of oxides and sulfides. Journal of the Society of Chemical Industry, 63(5), 125-160. link ↗ | Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York. link ↗ |
| Alias≠ | Gibbs Free Energy Diagram, High-Temperature Reduction Diagram | Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model |
| Närliggande | 3 | 3 |
| Sammanfattning≠ | The Ellingham Diagram, introduced by Harold Ellingham in 1944, is a graphical representation of the Gibbs free energy change for oxide formation and reduction as a function of temperature. It is an essential tool for predicting the thermodynamic feasibility of ore reduction and selecting appropriate reducing agents and temperatures for smelting and roasting operations. | The Shrinking Core Model, formalized by Szekely, Evans, and Sohn in 1976, describes the kinetics of chemical reactions between solid ore particles and surrounding fluids (leaching solutions, roasting gases). As the reaction proceeds from the particle surface inward, an unreacted core shrinks while products accumulate in a product layer. The model enables prediction of leaching times and optimization of hydrometallurgical processes. |
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