Sinter is the primary raw material for blast furnaceBlast furnace ironmaking, and the sinteringSintering processProcess is also a major energy consumer and pollutant emitter in iron production. With the implementation of ultra-low emissionEmission standards in Chinese steelSteel enterprises, the issue of CO emissionsCO emission from sinteringSintering has become a key focus for environmental mitigation. This paper presents an integrated CO recyclingRecycling and utilization technology for sinteringSintering flue gasFlue gas. Through the development and application of technologies such as large flue gas recirculationFlue gas recirculation, steam injection onto the sinteringSintering bed surface, and CO catalytic oxidationCatalytic oxidation, a 38.66% reductionReduction in CO emissionsCO emission from sinteringSintering flue gasFlue gas was achieved. Additionally, the consumption of blast furnaceBlast furnace gas in the desulfurization and denitrization systems was reduced by 66.63%. These advancements have enabled large and medium-sized sinteringSintering machines to achieve ultra-low CO emissionsCO emission below 2800 mg/m3 in discharged flue gasFlue gas.