Slurry enters chute through ore tank, and then gets into separating zone by waterpower. Minerals with strong magnetism is absorbed on the barrel’s surface under the force of magnetic field and get into the ore concentrate outlet along with the rotation of cylinder. After leaving the magnetic field, they flow into ore concentrate box by the action of gravity and flushing water. Gangue and ore with weak magnetism are discharged into a pipe in the opposite direction of cylinder rotation.