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Superconducting Magnet Design for a Vertical-Ring High Gradient Magnetic Separation System | IEEE Journals & Magazine | IEEE Xplore

Superconducting Magnet Design for a Vertical-Ring High Gradient Magnetic Separation System


Abstract:

This paper describes a design of a Vertical-ring High Gradient Superconducting Magnetic Separation (VHGMS) system for recovery of the magnetic ore and purification of non...Show More

Abstract:

This paper describes a design of a Vertical-ring High Gradient Superconducting Magnetic Separation (VHGMS) system for recovery of the magnetic ore and purification of non-metallic minerals. Compared to the conventional design which uses copper wires, using superconducting magnet can help reduce the energy consumption and increase the magnetic field. The first part of this paper introduces the operation margin design of the superconducting magnet. This magnet is wound with NbTi wires and its temperature margin is designed to be higher than 1 K. It generates an average magnetic field above 2 T in the filtering area. The second part of this paper introduces a quench protection circuit implemented in this magnet and post-quench analysis is also presented. Simulation results show that maximum temperature and terminal voltage are within the safe limits. So, the superconducting magnet can be effectively protected from burning-out during a quench. The third part of this paper proposes a novel reinforcement structure for the coil and analyzes the stress status during magnet charging and quench process. The Von mises stresses in the coil and stainless steel are both in allowable stress region and have a large safety margin.
Published in: IEEE Transactions on Applied Superconductivity ( Volume: 32, Issue: 6, September 2022)
Article Sequence Number: 3700305
Date of Publication: 25 February 2022

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I. Introduction

High Gradient Magnetic Separation (HGMS) is an efficient way to recover weakly magnetic minerals. Since the 1970s, HGMS separators have been implemented to the recovery of the magnetic ore such as hematite, siderite limonite and rare earth minerals, and purification of non-metallic ore like quartz, feldspar, fluorite and kaolin [1]. In order to prevent matrix clogging and improve beneficiation efficiency, Vertical-ring High Gradient Magnetic Separators (VHGMS) with pulsating mechanism were invented and successfully applied to treat weakly magnetic minerals [2].

References

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