High-gradient magnetic separation for wastewater treatment based on direct-conduction cooling superconducting magnets with large diameter, room temperature aperture

Abstract The development of cryogenic technology has greatly reduced the cost of large-diameter superconducting magnets and the difficulty of operation, making it possible for industrial fields. Our team has developed a large-diameter (room temperature aperture of more than 400 mm) superconducting magnet with direct-conduction cooling by a single GM refrigerator, combined with the designs of the transmission device, we have developed a superconducting magnetic separation water treatment system that can operate continuously. In order to apply this system to practical engineering projects, it is necessary to optimize its operating parameters to improve the equipment’s treatment capacity and ensure the treatment effect. Through experimentation, we obtained relatively reasonable parameters for water flow rate and chain drive speed, which have been verified in actual engineering projects.