Powder vacuum drying mixer

The utility model relates to the technical field of mixers. The powder vacuum drying and mixing machine comprises a conical machine shell, an inner shell, a circulating constant-temperature medium, aninner spiral blade, an outer spiral blade, a pulse dust collector and a temperature sensor, the inner shell is located in the conical machine shell, and the circulating constant-temperature medium islocated in a gap between the inner shell and the conical machine shell. According to the utility model, dehydration and drying are carried out in a vacuum state; the heat of the circulating constant-temperature medium is in contact with the wet material through the inner wall of the inner shell; vapour is evaporated after the wet material absorbs heat; a vacuum pump is used for pumping away through a vacuum exhaust pipe; due to the fact that the whole device is in a vacuum state, the forward rotation state of the inner spiral blade is matched with the opposite rotation direction of the outerspiral blade, materials are