BigPatents India

Process for the manufacture of ultra high reducible sinter having high strength. The process yields sinter having RDI of between 24.2 to 27% and RI between 71.6 to 76% and comprising 55.5 to 58% Fe, 9.37 to 11% FeO and CaO/SiO2 ratio of 2.14 to 2.37. The process comprises providing a sinter pot having side wall insulation, providing raw materials comprising ore fines with Fe content of at least 63.5% and particle size of —3mm 70%, balling the raw materials and heating the raw materials in the sinter pot at average bed temperature of 1350 to 1390 0C and with VSS selected such that VSS is low in top sinter layer and high at bottom sinter layer. The ultra high reducible sinter of the present invention results in improved blast furnace operation and especially helps in raising the reduction efficiency. (FIG.3)