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	収縮コアモデル	スラグ塩基度
分野	鉱山工学	鉱山工学
系統	Process / pipeline	Process / pipeline
提唱年	1976	1950
提唱者	Szekely, Evans, and Sohn	Pyrometallurgical Practice
種類	Reaction kinetics model for solid-fluid reactions	Slag composition parameter for controlling roast/smelt conditions
原典	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.
別名	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Basicity Index, Slag Chemistry Parameter
関連	3	3
概要	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.