福建冶金2026，Vol.55Issue(1)：21-24,4.
Na2WO4熔盐体系下公斤级电解回收硬质合金工艺研究
Kilogram-Scale Electrolytic Recycling of Cemented Carbide in Na2WO4 Molten Salt System
摘要
Abstract
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.关键词
硬质合金/熔盐电解/电流密度/公斤级/粒度Key words
cemented carbide/molten salt electrolysis/current density/kilogram-scale/particle size引用本文复制引用
张涵,苏水杰,张楠,刘春佳..Na2WO4熔盐体系下公斤级电解回收硬质合金工艺研究[J].福建冶金,2026,55(1):21-24,4.基金项目
国家重点研发计划(2023YFB3811800) （2023YFB3811800）
