Abstract: Against the backdrop of increasingly depleted,fine-grained,and complex mineral resourc⁃ es,and in response to the development demands for large-scale flotation machine and simplified processes in mineral processing,this study focuses on Dexing Copper Mine.Adopting a technical approach combining "experimental research +process simulation,"the applicability of large-scale flotation machines in short flow configurations was investigated.Through condition tests,the optimal roughing process parameters were determined:grinding fineness of -0.074 mm accounting for 65%,lime dosage of 300 g /t,and collector MAC-12 dosage of 44 g/t.Based on standard floatability tests and a first-order kinetic model ,the flotation kinetic parameters of chalcopyrite in four types of flotation machines with different volumes were obtained. It was found that large-volume flotation machines exhibit a significantly higher fast-floating rate constant , demonstrating their superior initial separation efficiency.These parameters were input into JKSimFloat soft ⁃ ware to establish a flotation process model,and simulation comparisons were conducted for configuration schemes involving flotation machines of different volumes（130 ~680 m³）.The results showed that the short-flow configuration using 680 m³ultra-large flotation machines achieved excellent indices ,with a cop⁃ per concentrate grade of 5.39%and a recovery rate of 85.19%.This study validates the feasibility of JKSim ⁃ Float simulations based on precise kinetic parameters for the selection of large-scale flotation machine and process optimization.It lays the foundation for a complete methodological framework ,from kinetic parame⁃ter measurement to process simulation and validation,effectively addressing the limitations of traditional se ⁃ lection methods.The findings provide theoretical basis and technical support for the efficient configuration of short flows and the scientific application of ultra-large flotation machines.

Key words: large-scale flotation machine, flotation kinetics, standard floatability test, JKSimFloat sim ? ulation