Development of a Superconducting High Gradient Magnetic Separator for a Highly Viscous Fluid

A magnetic separator which can remove martensitic transformed stainless steel particles from highly viscous fluid was developed. In the process of industrial products such as chemicals and foods, stainless steel wear debris are mixed from the movable parts of the manufacturing line into highly viscous working fluid. It is necessary to remove these impurities, because these can be the factor of the quality loss. Recently, the separation efficiency of the debris is decreasing drastically because the requirement of the viscosity of the working fluid is increasing over 10 . It becomes more difficult to remove the debris with smaller than 25 micrometers. To solve the problem, superconducting high gradient magnetic separator was developed. We report the design guideline of the system based on the calculation and experiments to achieve high separation efficiency of the debris from the highly viscous fluid.