Research and Development of Superconducting Magnetic Separation System for Powdered Products

The superconducting magnetic separation system which separates ferromagnetic particles from powder mixture has been developed. It is required to remove the impurities from the powdered products without using chemical or heating processing. The impurities are usually powdered stainless steel from the piping which are deformed strongly and shows ferromagnetism. Magnetic separation using permanent magnets have been used for the separation. The conventional magnetic separation system has not shown the expected performance especially for the small sized impurities. To solve the problem, superconducting magnetic separation system was developed. We used the magnet with magnetic field up to 2 T. The boa size was 100 mm in diameter. Inside of the magnetic boa the magnetic filters are located to produce the high magnetic gradient. The performance of the separator was reported together with the design guideline.