With the increasing scarcity and diversification of global iron ore resources,the application of non-mainstream iron ore powders (such as Toker powder and Tieqiao concentrate powder) in pellet sintering processes has gradually become a focal point for the steel industry. Non-mainstream ores usually refer to mineral resources with total iron content (TFe) below 62%,high impurity content,and high levels of harmful elements such as phosphorus,sulfur,and aluminum, or mineral resources with low output,small market share,and significant quality fluctuations. These are mainly produced by small and medium-sized mines and serve as supplementary sources for mainstream mines (such as the four major mine products),requiring beneficiation or ore blending to enhance their value for use. This paper systematically studies the physicochemical properties,pelletizing performance,consolidation behavior,and their impact on pellet quality during pellet roasting,mainly with OTF ore as the main focus and OIB as supplementary to other non-mainstream ores. Test results show that all ore mixing schemes using OTF as the main material and adding other non-mainstream ores improve the drop strength of the pellets as moisture increases,with compressive strength greater than 10 N/ P in all ratios. Among them,OIB increases compressive strength and lowers burst temperature. Under conditions of a preheating temperature of 1 050 ℃, preheating time of 6 min,roasting temperature of 1 220 ℃,and baking time of 15 min,the compressive strength of preheated pellets can be obtained at 537 ~693 N/ P,roasted pellets at 2 902 ~3 144 N/ P,with a drum index of about 95% and a wear resistance index of about 3%. All indicators meet industrial production requirements. Pellet reduction expansion is relatively low ( <12%). The low-temperature reduction powdering index ( > 3. 15 mm) is greater than 96%,but the reducibility is slightly below 60%.