Development of vertical ring high gradient magnetic separator with evaporative cooling system

A prototype of vertical ring high gradient magnetic separator was designed and fabricated, and the exciting coils, which generate a 1.5 Tesla background magnetic field, are cooled by evaporative cooling system. The operating magnetic flux density distribution was computed carefully by magnetic circuit method and finite element method, and the operating temperature distribution of exciting coils was computed too by finite element method. The test values of the distribution of magnetic flux density and temperature are in accord with design computations.