关键词: 含硼铁精矿, 金属化还原铁, 磁选, 铁精矿, 硼精矿

Abstract: There is 55.55% Fe and 4.22% B₂O₃ in a boron bearing iron concentrate from Liaoning.Iron and boron were predominantly in the form of magnetite and szaibelyite，respectively.Meanwhile，serpentine and pyrrhotite were the main gangue minerals.In order to separate iron from boron，an innovative method of combined briquetting followed by metallic reduction roasting and low-intensity magnetic separation was employed.The results showed that the reduced briquettes (Φ15 mm×20 mm) with a metallization ratio of 88.82% were obtained after roasted by excessive coal (n(C)∶n(Fe)=2.5) at 1 125 ℃ for 150 min.Subsequently，iron concentrate containing 92.7% Fe with recovery of 94.4% and boron concentrate containing 14.5%  B₂O₃  with recovery of 84.4% were achieved after ground the reduction products to 65% passing 0.074 mm and low intensity magnetic separation with magnetic field intensity of 80 kA/m.Effective separation of iron from boron was realized.

Key words: Boron-bearing iron concentrate, Iron metallic reduction, Magnetic separation, Iron concentrate, Boron concentrate