1. Rotary Drum
It is the main part where limestone is placed and dried. The drum is usually a long, cylindrical container made of high temperature and abrasion resistant material to withstand the rotation and drying process of the limestone.

2. Transmission device
 used to drive the rotation of the drum, usually composed of a motor, reducer, etc. The transmission is designed to provide sufficient torque and a stable rotational speed to ensure that the limestone is evenly heated within the drum.

3. Support device
The structure that supports and stabilizes the drum to ensure its normal operation. The support device usually includes the bearings, bearing seats and other parts of the drum.

4. Feeding device
The part where the limestone to be treated is introduced into the drum. The design of the feeding device should ensure that the limestone can be evenly distributed in the drum to improve the drying effect.

5. Discharge device
Take out the part of dried limestone from the drum. The design of the discharging device should facilitate the smooth discharge of limestone.

6. Hot air stove
Provides hot air or other heat sources, and introduces hot air into the drum through the air inlet. The heating effect of hot air evaporates the water in the limestone, completing the drying process.

7. Sealing device
To prevent the leakage of hot air and moisture, sealing rings and other devices are usually used to improve drying efficiency and protect the environment.