RING-SHAPED MAGNETIC POTENTIAL BARRIERS FOR SEPARATION OF WEAKLY MAGNETIC PARTICLES

摘要

Weakly magnetic materials may be separated within Open Gradient Magnetic Separators using dry or wet processes. Axial-symmetric arrangments are of special interest when utilizing centrifugal forces in addition to magnetic forces. Thereby gradient fields are needed which generate mainly radially inwards directed forces. Such forces form a kind of magnetic potential barrier which cannot be transversed by magnetic particles. The necessary field distributions can be attained by means of properly shaped coils which are arranged similar to the known Helmholtz configuration. The layout of such superconducting coils for applications in centrifugal separators in discussed.