To meet the requirements of a high proportion of fluxed pellets in blast furnace smelting,belt sintering machines are used to produce fluxed pellets in Tangsteel New District since early 2021.By renovating the lime distribution equipment,changing the dusting ash mixing method,increasing the proportion of fine iron concentrate,lowering the temperatures in the drying section,preheating section,and sintering section,and strictly controlling the chemical composition of fluxed pellets,such as SiO2 not exceeding 3.5%and TiO2 content not exceeding 0.5%,the stability of the chemical composition of fluxed pellets is significantly improved.The low-temperature reduction disintegration index RDI+6.3 is increased from around 70%to around 93%,providing assurance for long-term stable operation with up to 35%fluxed pellet ratio in the blast furnace.
Belt sintering machineFluxed pelletsProduction practiceLow-temperature reduction disintegration
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