A stable heat is provided by a heating device, and heat is transferred to the solid asphalt through heat conduction (e.g., contact heating), heat convection (e.g., heat medium circulation), or heat radiation (e.g., high-temperature flue gas heating), raising its temperature above the softening point (typically, the melting temperature of asphalt is 120-180℃, adjusted according to the asphalt type), gradually transforming it from a solid to a flowable liquid. Simultaneously, a collection and conveying system exports the liquid asphalt to storage tanks or subsequent equipment (e.g., modified asphalt equipment, emulsified asphalt equipment), and removes impurities.

The entire process requires control of heating temperature and rate: avoiding localized overheating that could lead to asphalt aging (e.g., volatilization of lightweight components, performance degradation), while ensuring the melted asphalt's fluidity meets conveying requirements.