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	Shrinking Core Model	Slaggbasicitet
Ämnesområde	Gruvteknik	Gruvteknik
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1976	1950
Upphovsperson	Szekely, Evans, and Sohn	Pyrometallurgical Practice
Typ	Reaction kinetics model for solid-fluid reactions	Slag composition parameter for controlling roast/smelt conditions
Ursprungskälla	Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York.	Barnes, J. F., Edwards, C. C., & Sims, R. L. (2010). Copper smelting and refining: pyrometallurgical fundamentals. JOM, 52(12), 38-43.
Alias	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Basicity Index, Slag Chemistry Parameter
Närliggande	3	3
Sammanfattning	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.	Slag basicity is a measure of the composition of slag formed during smelting and roasting operations. It is typically expressed as the ratio of basic oxides (CaO, MgO) to acidic oxides (SiO2). Basicity controls slag fluidity, viscosity, and reactivity, directly affecting metal recovery, processing temperature, and product quality. It is a critical parameter in copper, nickel, and lead smelting.