关键词: 氰化尾渣, 直接还原焙烧, 磁选, 还原铁粉

Abstract: Experimental research on cyanided tailings containing 48.05% grade of iron by the process of direct reduction roast-magnetic separation tests was carried out. The results indicated that under the condition of roasting at 1 150  ℃ for 40 min with 20% bituminous coal 2，and grinding fineness of -0.074 mm 78% and magnetic intensity，the DRI with Fe grade of 94.11% and recovery of 90.14% was obtained by the process of one roughing low intensity magnetic separation with intensity of 87.56 kA/m. In the process，iron was concentrated efficiently，meanwhile high content of harmful ingredients，sulfur are enriched into tailings.

Key words: Cyanided tailings, Direct reducing roast, Magnetic separation, Direct reduction iron