In view of the similarity of chemical composition between steel slag,blast furnace slag and bentonite. In this study,the synergistic optimization effect of different metallurgical solid wastes on the performance of vanadium iron concentrate pellets is systematically explored by using the optimization blending strategy,aiming to solve the key problems such as poor pelletization,deterioration of fresh pellets quality and insufficient strength of fresh pellets in vanadium tailings. The results indicate that the pelletizing index is generally low when metallurgical solid waste is added,with only a steel slag ratio of 15% to 20% achieving a moderate level. Therefore,the optimal ore blending scheme is determined to be 20% steel slag or 25% blast furnace slag. Microscopic analysis shows that the strength of fresh pellets is dominated by the solid-phase diffusion connection bridge of ferrites such as calcium ferrite and calcium ferrite and magnesium ferrite, supplemented by the liquid phase bonding of compounds with low melting point. After the combination of solid waste,the compressive strength of fresh pellets is increased by about 59%,and the compressive strength of fresh pellets is increased by 28. 4% (steel slag) and 15. 6% (blast furnace slag) compared with the raw ore,respectively. This type of small pellets can be used as sintered mixture ingredients,effectively improving the air permeability of the material layer and improving the quality of sintered minerals.