By using the digital electric drying oven and microwave drying system, experiment select different microwave power
and different hot air temperature for oil shale drying. The results indicated that: microwave drying is faster than hot
air drying by an order of magnitude; microwave drying of oil shale is obviously classified into three phases:
warming-up, constant rate and falling-rate periods. Drying took place mainly in constant rate and falling-rate periods.
Through the analysis of experimental data processing, we can see that microwave drying is not suitable for Page’s
model, while hot air drying using Page model is fitting