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Основност шљаке×Elektroizdvajanje×Dijagram Elinghamovih (Ellingham) vrednosti×Model skupljajućeg jezgra×
OblastRudarstvoRudarstvoRudarstvoRudarstvo
PorodicaProcess / pipelineProcess / pipelineProcess / pipelineProcess / pipeline
Godina nastanka1950189019441976
TvoracPyrometallurgical PracticeIndustrial Electrometallurgy PracticeHarold Jeffrey Torreyson EllinghamSzekely, Evans, and Sohn
TipSlag composition parameter for controlling roast/smelt conditionsElectrochemical metal extraction and purificationGibbs free energy diagram for high-temperature reactionsReaction kinetics model for solid-fluid reactions
Temeljni izvorBarnes, J. F., Edwards, C. C., & Sims, R. L. (2010). Copper smelting and refining: pyrometallurgical fundamentals. JOM, 52(12), 38-43. link ↗Habashi, F. (2011). Electrometallurgy: principles, processes and materials. Metallurgical Transactions, 29(7), 1569-1589. link ↗Ellingham, H. J. T. (1944). Reducibility of oxides and sulfides. Journal of the Society of Chemical Industry, 63(5), 125-160. link ↗Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York. link ↗
Drugi naziviBasicity Index, Slag Chemistry ParameterElectrodeposition, Electrolytic ExtractionGibbs Free Energy Diagram, High-Temperature Reduction DiagramShrinking Unreacted Core Model, SCM, Leaching Kinetics Model
Srodne3333
SažetakSlag 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.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 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.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.
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ScholarGateUporedite metode: Slag Basicity · Electrowinning · Ellingham Diagram · Shrinking Core Model. Preuzeto 2026-06-18 sa https://scholargate.app/sr/compare