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	Model skupljajuće jezgre	Dijagram nagiba
Područje	Rudarstvo	Rudarstvo
Obitelj	Process / pipeline	Process / pipeline
Godina nastanka	1976	1944
Tvorac	Szekely, Evans, and Sohn	Harold Jeffrey Torreyson Ellingham
Vrsta	Reaction kinetics model for solid-fluid reactions	Gibbs free energy diagram for high-temperature reactions
Temeljni izvor	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.
Drugi nazivi	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Gibbs Free Energy Diagram, High-Temperature Reduction Diagram
Srodne	3	3
Sažetak	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.