Rotating magnetic grids are used for filtering small amounts of micron ferromagnetic particles from sticky powders in free-fall transport pipes (for example flour). Rotation of the magnetic bars inside the magnetic grid prevents bridging and blockages of the sticky powders.
Cleaning: manual with taking out the magnetic rotor unit out of the product channel. After that you can pull the magnetic bars out of pipes and in this way ferromagnetic particles and oxides fall off the pipes.