Rotating drum and method of manufacturing the rotating drum

摘要

The invention provides a rotation rolling cylinder and a rotation rolling cylinder magnetic separation device, which can accurately convey the cutting power to the top of the rotation rolling cylinder when the cutting process is performed and the cutting powder is generated to prevent the leakage of the recovery. In the rotation rolling cylinder, a plurality of magnetic iron (4,4...) are fixed within the cylinder (5), and the outer cylinder constituted by the non-magnet materials rotate around the surrounding of the inner cylinder (5). One or more than one projections (31) from one end side to another end side are positioned on the circumference surface of the outer cylinder of the rotation rolling cylinder.