The drying and heating system can be regarded as an important part of the whole, so in actual work, it processes materials in a countercurrent heating manner, thereby fully dehydrating the cold aggregate and heating it at the same time. to a certain temperature, thus providing the necessary conditions for the normal and continuous operation of the asphalt mixing plant.
During the entire heating process of the asphalt mixing plants, the main purpose is to make the performance of the mixture more in line with the requirements of use, and to help the finished material have good paving performance. Normally, the heating temperature of aggregate is approximately in the range of 160℃-180℃.

The drying and heating system of the asphalt mixing plant mainly consists of two parts: a drying drum and a combustion device. The drying drum is mainly a device that completes the drying and heating of cold and wet aggregates. In order for the cold-wet aggregate to be able to complete the three requirements of preheating, dehydration, drying and heating within a limited time, it is not only necessary to evenly distribute the aggregate in the drum, but also to provide it with sufficient operation time, only in this way can the discharge temperature of the asphalt mixing plant reach the specified requirements.
The combustion device of the asphalt mixing plant is used to provide a heat source for drying and heating the cold aggregate. That is to say, in addition to selecting the appropriate fuel, it is also necessary to select a suitable burner for the asphalt mixing plant. In order to ensure the heating effect of the asphalt mixing plant, in addition to the reasonable selection of the above two devices, certain insulation measures also need to be taken.
Because for the asphalt mixing process, only by ensuring the normal operation of the heating system can we provide guarantee for the operation of the entire system, provide the necessary foundation for subsequent production, and meet the production requirements of the asphalt mixing plant.