Abstract: In view of disadvantages of present iron and boron separation technology, this paper proposed to adopt the RHF iron bead technology to treat the boron-bearing iron concentrate, and then it was verified by the thermodynamic feasibility analysis and laboratory tests. The laboratory research indicated that for the boron-bearing iron concentrate with Fe and B₂O₃ content of 47.20% and 6.90% respectively in Fengcheng of Liangning, an effective separation of slags and iron was realized by taking anthracite used in Laiwu Iron and Steel Company as reductant, QT-10 as pelletizing binder, high-temperature silicon-molybdenum furnace to simulate the rotary hearth furnace, under conditions of the mixing ratio of boron-bearing iron concentrate and coal dust at 83.3% and 16.7%, the amount of binder occupying 2% of total mass of concentrate and coal dust, moisture content in mixing materials at 7%, and carbon pellet calcined at 1 400 ℃ for 15 min. By this process, the boron-bearing iron beads and the high active boron-bearing steel slags obtained can be used as high-quality raw materials for steelmaking and boron chemical industry separately.

Key words: Boron-bearing iron concentrate, Boron and iron separation, RHF, Iron bead, Boron-rich slag