Abstract:In order to make full use of vanadium and titanium ore resources and improve the performance of pellets and increase their proportion in the blast furnace, the metallurgical properties of alkaline all-vanadium and titanium pellets and the its relationship with alkalinity, bentonite ratio, physical phase composition and microstructure are researched by adding quicklime to adjust the alkalinity of vanadium and titanium pellets, and the quality of pellets is evaluated by using a stratified comprehensive evaluation method. The results show that; under the conditions of preheating temperature of 950 ℃, preheating time of 20 min, roasting temperature of 1 230 ℃ and roasting time of 25 min, the compressive strength of most obtained pellets is above 2 000 N/P and the maximum is 3 340 N/P; the RDI+3.15mm of the specimens is higher than 96%. The RI of more than 55% pellet is higher than 70%, up to 89.9%; the free swelling index is all lower than 13%. The stratified comprehensive evaluation results show that the pellets with alkalinity of 0.6, 0.8 and 1.0 have the best overall performance after adding 2.0%, 1.5% and 1.8% bentonite, respectively. On balance, it is suggested that the alkalinity of pellets production should be 0.8 and the ratio of bentonite should be 1.5%.