Abstract: Experiment on the effects of boron-bearing iron concentrate applied to sintering of high chromium vanadium-titanium magnetic ore was carried out under laboratory conditions. The results show that， with the increase of boron-bearing iron concentrate addition， vertical sintering speed， sinter yield， tumbler strength， utilization coefficient raise at first then decrease， as well as composite indicator and RDI_+3.15. When boron-bearing iron concentrate addition is 5.0%， the maximum values of the above indexes are 28.84mm·min^-1， 86.02%， 61.2%， 1.919t·(m²·h)^-1， 363 and 90.76%， respectively. The properties of sinter ore with adding 5.0% boron-bearing iron concentrate ore are superior to the properties of sinter ore without boron-bearing concentrate. As a result， properties of high chromium vanadium-titanium magnetite sinter ore are optimized with adding balanced amount of boron-bearing iron concentrate， and can meet the higher requirements of blast furnace process.

Key words: high chromium vanadium-titanium magnetite ore, sinter ore, boron-bearing iron concentrate, metallurgical performance, composite indicator