BALL MILL MAGNETIC SEPARATOR Russian patent published in 2010 - IPC B03C1/10 B02C23/10 

FIELD: mechanical engineering.

SUBSTANCE: invention is intended for removal of magnetic metal impurities from bulk materials. The ball mill magnetic separator contains a rotary non-magnetic drum casing, a discharge device and a magnetic system with permanent magnets shaped as rectangular prisms. The drum is mounted on the outlet flange of the rotary ball mill and rotates together with it. Around the drum a support structure is arranged; mounted thereon at a gap relative to the drum casing and within its rotation plane is a magnetic conductor shaped as an arched magnet frame whose sector is equal to 200°-220° and mounted as displaced by an angle of 20°-40° from the vertical axis of the drum rotation plane in the direction opposed to that of the drum rotation. On the magnet frame surface turned towards the drum casing there are magnetic systems arranged with permanent magnets based on rare-earth metal alloys. The permanent magnets shaped as rectangular prisms whose side length ratio a:b:h, is 2:1:0,8. The pole pitch S of the permanent magnets on the arched magnet frame is 80-160 mm. On the inner surface of the steel drum there are polar metal concentrators arranged for the frame magnetic system. Attached to the support structure and arranged perpendicular to the drum rotation plane and at a slant downwards is a discharge device represented by a box-shaped tray serving for discharge of magnetic impurities. The tray is mounted in such a way that its beginning is positioned under the upper end of the frame arch with magnetic systems.

EFFECT: improved efficiency of magnetic impurities removal.

3 dwg