Rotary furnace drying system

The invention discloses a rotary furnace drying system. The rotary furnace drying system comprises a motor, a furnace body, an inert gas manufacturing machine and a filtering system, wherein a roller which is in transmission connection with the motor and provided with a steam opening is arranged in the furnace body; a heating device is fixed to the roller; the inert gas manufacturing machine communicates with the roller through a ventilation pipeline; the filtering system communicates with the steam opening through a pipeline; and the roller is also provided with a pressure measuring device and a pressure relief device. The rotary furnace drying system has the advantages that copper powder can be prevented from being accumulated and caked in the drying process, and then the copper powder can be completely dried till the water content is lower than 0.05%; and in addition, steam generated in the roller can be prevented from carrying the copper powder to enter air, so that environment pollution is avoided, and o