The drying process of refractory brick is divided into the following three stages.
The first stage is the constant speed drying stage. The evaporation of water only occurs on the surface of the green body. The drying speed is equal to the evaporation speed of water, which is related to the temperature, humidity and movement speed of the drying medium
The second stage is the deceleration drying stage. The evaporation rate of water from the surface exceeds the diffusion rate from the inside of the green body to the surface. The drying rate at this stage depends on the water content, the internal structure of the green body, the particle size of water and the lifting properties. The higher the drying temperature, the easier the diffusion
The third stage is the balanced drying stage. The drying speed gradually approaches zero and the water in the green body no longer decreases, which is called balanced water. After drying, the balance water in the green body is generally less than 1.0%, which meets the requirements of green body entering the kiln
