Abstract: Mineral processing operation of a concentrating plant in Jiangxi Province produced a large number of copper desulfurization tailings with iron and sulfur grades of 16.648% and 2.44% respectively. While the limited capacity of tailing dam， stacked tailings cause great harm to the environment. Therefore， magnetic separation combined flotation is used for the test. The result shows that， with the steel mesh whose diameter is 4 mm as magnetic medium， the background magnetic field intensity is 0.760 T， the slurry flow rate is 0.14 L/s， the pulsating impulse is 450 times/min， the iron grade of magnetic products has increased to 23.69% and sulfur content is 2.79%. Desulfurization flotation of magnetic products with FS as activator and isobutyl xanthate as collector shows that， the cement accessories products whose sulfur content is 1.01%， iron grade is 23.15% is gained， and the high sulfur tailing whose sulfur grade is 21.17% and sulfur recovery rate is 31.84% is simultaneously gained， desulfurization effect is good. The cement accessories products can meet the requirements of the cement industry， realize the comprehensive utilization of tailings， reduce the tailing discharge of 37.90%， reduce the pressure on the tailing dam and reduce environmental pollution.

Key words: Tailing, High-gradient magnetic separation, Flotation