Abstract
A prototype of a Superconducting Electromagnet Iron Remover (SEIR) system with a 3 tesla (T) central field has been designed and manufactured at the Institute of High Energy Physics (IHEP) of China. The SEIR system is deliberately designed to separate small pieces of hazardous ferromagnetic materials, such as detonators, from coal to achieve high purity and good yield. The SEIR system consists of a NbTi superconducting magnet, a LHe recondensation type cryostat with two GM cryocoolers (31 W/40 K, 1 W/4.2 K), and a pair of binary current leads (CLs), etc. This paper presents the thermal analysis and experimental results of the SEIR system. A three-dimensional (3D) model of calculation for the magnet system was built. The heat load and the temperature distribution of the magnet system were analyzed using a finite element method. With regard to the heat load of the system, the finite element analysis (FEA) simulation results were quite close to the experimental results.
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