关键词: 超导磁选, 超导高梯度磁选机, 稀土, 稀有金属, 萤石

Abstract: The contents of REO， Nb₂O₅ and Sc₂O₃ in the tailings of Bayan Obo Plant are 2.41%， 0.16% and 0.22% respectively， containing a large amount of fluorite. For improving the recovery of REO， Nb₂O₅ and Sc₂O₃ and creating conditions for comprehensive recovery of fluorite， the technology of REO， Nb₂O₅ and Sc₂O₃ recovery process were studied by SLon-100 periodic superconducting high gradient magnetic separator， and the XRD and main chemical components of magnetic separation products were analyzed. The experimental results show that the concentrate with REO grade of 3.04% and recovery of 88.91% can be obtained by SLon-100 periodic superconducting high gradient magnetic separator with the diamond mesh as magnetic matrices type， background magnetic induction intensity 6 T， the feeding density in slurry 12%， the slurry velocity 7.1 L/min， and pulsating 100 P/min. Rare earth and rare metal minerals are obviously enriched in concentrates， which creates conditions for further enrichment of rare earth and rare metal minerals， and significantly reduces the use of gangue mineral inhibitors in the process of flotation purification of rare earth and rare metal minerals； Fluorite is obviously enriched in tailings， creating conditions for floatation of fluorite from tailings.

Key words: Superconducting magnetic separation, Superconducting high gradient magnetic separator, Rare earth, Rare metals, Fluorite