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	電解採取法	収縮コアモデル
分野	鉱山工学	鉱山工学
系統	Process / pipeline	Process / pipeline
提唱年	1890	1976
提唱者	Industrial Electrometallurgy Practice	Szekely, Evans, and Sohn
種類	Electrochemical metal extraction and purification	Reaction kinetics model for solid-fluid reactions
原典	Habashi, F. (2011). Electrometallurgy: principles, processes and materials. Metallurgical Transactions, 29(7), 1569-1589.	Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York.
別名	Electrodeposition, Electrolytic Extraction	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model
関連	3	3
概要	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.	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.