Bunting has developed a Rare-Earth Tube Magnet for removing fine iron from dry powders.
The new teardrop design will prevent fine powder from building up on the magnet surface, but retains the high magnetic field of 12,000 gauss.
Processors can use tube magnets to capture magnetic objects like iron shards, screws and bolts in wet and dry settings. Metal contamination can cause expensive damage to equipment, and the tube magnets are commonly used in the form of a Grate Magnet, where several tubes make up a Magnetic Separation grid.
The magnets are made of Neodymium Iron Boron magnet slugs. This material has the highest permanent magnetic field. It can separate very fine iron and weakly magnetic stainless steel from solids and liquids.
When the teardrop magnet is pointed towards the product flow the tiny surface area of the point will stop fine powder building up in the parallel direction. In curved magnets with a higher surface area, magnetic material can build up - over time this ‘bridging’ can increase and cause a blockage. The build-up always reduces the separation performance, increasing the likelihood of metal contamination continuing through the process.
With the teardrop shape the magnetic parts will flows under gravity to the opposite side of the Tube Magnet, any magnetically susceptible materials are attracted to the high magnetic force. These magnetics migrate to the bottom of the Tube Magnet, where they are securely held away from the product flow.
The new Teardrop Tube Magnet is available as a single Tube or as part of a multi-Tube Grate Magnet assembly.
Bunting teardrop diagram
The Bunting Magnetics Europe Teardrop Tube Magnet Magnetic Separator