Feeding device for external magnetic drum separator

The utility model discloses a feeding device for an external magnetic drum separator. The feeding device comprises an ore pup buffer tank, wherein a magnetic box is arranged at the bottom of the ore pulp buffer tank; an ore inlet pipe and an ore outlet pipe are respectively arranged at the top and the tail part of the ore pulp buffer tank; the ore inlet pipe is connected with external equipment through a flange; the ore outlet pipe is connected with an ore distributor through a flange; an overflow plate is arranged at the bottom of the ore pulp buffer tank and is arranged at the edge part of one side, close to the ore outlet pipe, of the mounting position of the magnetic box; a partition sieve is arranged on an ore outlet pipe of the ore pulp buffer tank; a coarse discharge opening is formed below the partition sieve; the ore distributor comprises an ore distribution pipe; an ore distributing partition plate is arranged in the ore distribution pipe; a plurality of ore outlets are formed in the front middle part of the ore distribution pipe; a magnetic pole group is arranged in the magnetic box; and the polar direction of the magnetic pole group is alternating along the transverse section or along the advance direction of the ore pulp. According to the feeding device, uniform feeding along the axial direction of a sorting cylinder of the external magnetic drum separator can be realized; the wear-resisting property is good; and the service life is long.