The first stage of the experiment was a convective drying (CV) test, at a temperature
of 50 C and hot air flow rate of 4 m/s. The drying kinetics of this process and the
temperature of the material are shown in Fig. 1. As shown in Fig. 1, the temperature
of the material rises during the process and reaches a constant value in the fourth
hour. The time of the process was 5.13 [h].