Dry centrifugal-force magnetic separator with rotating separating channel walls

摘要

The invention relates to the implementation of a magnetic separator which operates dry, in which an anadynamic, isodynamic or possibly also a weakly catadynamic magnetic force field counteracts centrifugal mass forces and in this way permits selective separation. To ensure the centrifugal mass forces, the granular mixture to be separated is concentrated locally and put into a separating channel formed by a rotating U-shaped annular profile and a belt which runs together with the latter over part of its circumference, covers it on the outside and is set revolving. The insufficiently magnetizable grains migrate outwards as a result of the predominant centrifugal forces and are deposited close to the belt covering the separating channel, being conveyed as far as the end of the closed separating channel and finally discharged there. The more highly magnetizable grains, on the other hand, migrate inwards as a result of the predominant magnetic forces, where they are fixed magnetically as a co-rotating granular ring, so that they can finally be discharged at a suitable point separately from the weakly magnetic granules. IMAGE