关键词: 钒钛磁铁矿, 提质降杂, 磁选柱, 浮选脱硫

Abstract: Vanadium-titanium magnetite is an important strategic mineral resource in Western Pan⁃ zhihua area of China. However，its iron concentrate generally has problems such as low iron grade and high sulfur and phosphorus content，which affects the subsequent smelting efficiency and environmental protec⁃ tion cost. In order to improve the quality of vanadium-titanium iron concentrate and reduce the sulfur con⁃ tent，the vanadium-titanium iron concentrate of a concentrator in Western Panzhihua area was taken as the research object，and the proces mineralogy properties of the ore，such as chemical multi-elements，miner⁃ al composition and content，particle size composition and iron distribution，mineral embedding characteris⁃ tics and particle size were studied. On this basis，the combined process of ultra-fine grinding of tower mill-one roughing one cleaning low intensity magnetic separation-magnetic separation column cleaning�one roughing one cleaning flotation desulfurization was proposed to carry out the experimental study on quality improvement and impurity reduction. The results show that the high-quality vanadium-titanium iron concentrate with yield of 81.64%，iron grade of 60.47%，iron recovery of 89.66% and sulfur content of 0.27% can be obtained under the conditions of tower mill grinding fineness of -0.043 mm of 90%，mag⁃ netic induction intensity of low intensity magnetic roughing separation is 200 mT，magnetic induction in⁃ tensity of cleaning is 120 mT，rising water of magnetic separation column is 330 mL/s，using sulfuric acid as activator and liquid xanthate as collector for flotation desulfurization. This process significantly improves the quality of iron concentrate，and provides a technical reference for similar vanadium-titanium iron con⁃ centrate to improve quality and reduce impurities.

Key words: vanadium titanium magnetite, quality improvement and impurity reduction, magnetic sepa? ration column, flotation desulfurization