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	Model Teras Tirus	Diagram Ellingham
Bidang	Kejuruteraan Perlombongan	Kejuruteraan Perlombongan
Keluarga	Process / pipeline	Process / pipeline
Tahun asal	1976	1944
Pengasas	Szekely, Evans, and Sohn	Harold Jeffrey Torreyson Ellingham
Jenis	Reaction kinetics model for solid-fluid reactions	Gibbs free energy diagram for high-temperature reactions
Sumber perintis	Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York.	Ellingham, H. J. T. (1944). Reducibility of oxides and sulfides. Journal of the Society of Chemical Industry, 63(5), 125-160.
Alias	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Gibbs Free Energy Diagram, High-Temperature Reduction Diagram
Berkaitan	3	3
Ringkasan	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.	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.