Abstract:As a new drying technology, microwave heating technology has been widely used in the field of mineral drying. In this paper, taking the pyrolusite in Daxin county, Guangxi province as the research object of microwave drying, taking microwave heating as the dry heat source, and the microwave drying experiments of pyrolusite were carried out under different conditions of initial moisture content, pyrolusite quality and microwave power respectively. The effect of experimental factors on microwave drying rate of pyrolusite was studied, and a new process of microwave drying of pyrolusite was developed, which provided theoretical basis and experimental data for industrial application of microwave drying of pyrolusite.