SOME SELECTED ASPECTS OF HIGH GRADIENT MAGNETIC SEPARATION USING SUPERCONDUCTING MAGNETS

摘要

Since the 1970s, magnetic separation has been increasingly used for purification of liquid, such as heavy-metal ion removal from laboratory waste-water, purification of kaolin clay in the paper-coating industry, waste water recycling in the steel industry, and recycling of glass grinding sludge in cathode-ray tube polishing factories. In the 1980s, large superconducting magnets were adopted for the field coils of high-gradient magnetic separation system used for kaolin clay purification. In this paper some practical aspects of the construction of a matrix high-gradient separator equipped with the DC superconducting electromagnet as well as the problems of working conditions of the separator are presented. In the separator, magnetic field will be generated by superconducting windings than low temperature superconductors (LTS) or high temperature superconductors (HTS).