<p>This study focuses on the “bulk-phase distributed” dissolution behavior of porous tungsten carbide (WC) anodes in the molten salt electrolysis process for cemented carbide recycling. Through electrochemical testing and multiscale characterization, the dissolution kinetics were systematically investigated. Based on the physical picture of a “localized shrinking-core” reaction governed by a hybrid mechanism of “interfacial oxidation-microscopic diffusion-macroscopic mass transfer,” an explicit kinetic equation describing the process was established. Galvanostatic electrolysis experiments under varying current densities and temperatures validated the theoretical relationships between key model parameters and operating variables. Arrhenius analysis further confirmed the physical rationality of the parameters. The model provides an effective tool for the quantitative analysis of dissolution behavior in porous anodes and can also provide a verifiable theoretical framework for understanding the dissolution kinetics of similar porous electrode systems.</p>