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	収縮コアモデル	電解採取法
分野	鉱山工学	鉱山工学
系統	Process / pipeline	Process / pipeline
提唱年	1976	1890
提唱者	Szekely, Evans, and Sohn	Industrial Electrometallurgy Practice
種類	Reaction kinetics model for solid-fluid reactions	Electrochemical metal extraction and purification
原典	Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York.	Habashi, F. (2011). Electrometallurgy: principles, processes and materials. Metallurgical Transactions, 29(7), 1569-1589.
別名	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Electrodeposition, Electrolytic Extraction
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.	Electrowinning is an electrochemical process that extracts and refines metals from dilute leaching solutions by passing electric current through an electrolytic cell. Metal ions migrate to the cathode (negative electrode) and are reduced to pure metal, while impurities remain in solution. This process is essential for copper, zinc, cobalt, nickel, and gold refining, producing metals of exceptional purity.