关键词: 金红石, 中强磁预先抛尾, 浮选, 提纯

Abstract: In order to exploit and utilize rutile ore resources in Zaoyang Hubei in an efficient，low cost，little contamination and more economical way，rutile beneficiation experiment was conducted by high gradient medium-high intensity magnetic processing based on low intension magnetism in main gangues，while rutile has no magnetism.The results showed that:①tailings discarding yield rate can reach 29.16% using the process of one roughing，one scavenging high gradient medium-high intensity magnetic separation at grinding fineness of 88.60% passing 0.074 mm，medium-high intensity magnetic concentrate with rutile content of 3.07% and recovery of 89.50% was obtained.②after medium-high intensity magnetic concentrate was treated by the closed circuit flotation of one roughing three cleaning three scavenging，rutile flotation concentrate was obtained with rutile content of 64.53% and recovery of 82.21%.③treating the rutile flotation concentrate via high gradient high intensity magnetic separation-roasting-hydrochloric acid leaching process to refine flotation concentrates，final rutile concentrates contained 87.88% rutile with rutile recovery of 71.21%，and the grade of TiO2 90.12% was obtained at the conditions of background field intensity for high gradient high intensity magnetic separation of 1.2 T，roasting temperature 900 ℃ for 45 min，and then hydrochloric acid was chosen to leach，the solids of acid was 10%，ratio between liquid and solids was 1 to 5，leaching time was 30 min with temperature at 80 ℃.Compared with traditional gravity concentration as pre-concentration processing，magnetic processing to pre-concentrate rutile can reduce fine rutile particles loss，improve its recovery，which provides a new idea of processing rutile resource effectively at domestic.

Key words: Rutile, Pre-discarding with medium-high intensity magnetic separation, Flotation, Purified