Na2WO4熔盐体系下公斤级电解回收硬质合金工艺研究OA

As a crucial material in industry,the optimization of recycling processes for cemented carbide holds significant importance for industrial applications.Molten salt electrolysis has emerged as a promising research direction due to its high efficiency and controllability.In this study,WC-15Co cemented carbide was recycled through a Na2WO4 molten salt system using current densities of 60,80,and 100 mA/cm² in kilogram-scale experiments.The obtained metal powders were characterized using X-ray diffractometer(XRD),scanning electron microscope(SEM),energy dispersive spectrometer(EDS),and laser particle size analyzer to investigate the particle size,morphology,and phase composition.The effects of current density on recovery rate,powder morphology,and particle size were systematically explored.Experimental results demonstrate that the products primarily consist of three phases:W,WC,and Co6W6C.At 80 mA/cm² current density,the highest recovery rate was achieved with predominantly equiaxed grain growth and minimal particle size variation.However,at 100 mA/cm² current density,the powder yield decreased significantly,accompanied by increased particle size disparity and the formation of acicular and lamellar grain structures.