Abstract: Pulsating high gradient magnetic separation is one of the effective ways to separate weakly magnetic minerals.Presently, there are pulsating high gradient magnetic separators with a vertical or horizontal magnet system.The kind with a horizontal magnet system adopting multi-gradient and air-gas joint discharge techniques was tested in Shanghai Meishan Iron Concentrator.The test results showed that, at the same operation conditions, its performance indexes reached those with a vertical magnet system operating on the production site, which were kept in a long-term operation.It ran for three months on the site of Meishan Concentrator without replacing the medium box, which indicates that this equipment is rationally designed and its ore discharging mode is both advanced and efficient.

Key words: Horizontal magnet system, Multi-gradient, Air-water joint discharge of ore