'AN IMPROVED PROCESS FOR PREPARATION OF PELLET-SINTER COMPOSITION AGGLOMERATE (P-SCA) OF IRON OXIDE FINES FOR USE IN BLAST FURNACE'

摘要

In the present invention an improved process for preparation of Pellet-Sinter Composition Agglomerate (P-SCA) of iron oxide fines for use in blast furnace is disclosed which uses Indian iron ore to utilize the micro-fines in sintering . The prior art although describes a process of composite agglomeration with china ore wherein carbon powder was used in pellet mix as heat source. Since, the carbon enhances porosity in the pellet, not much strength improvement of the pellet is possible according to prior art. This invention utilizes waste materials containing metallic iron or lower iron oxide viz. LD sludge, mill scale or DRI fines in the pellet, which are not susceptible to pore formation in the pellet but provide good strength. The process yields a very good quality sinter even at the lower basicity that is usable in the blast furnace. It increases the fines acceptability and decreases energy consumption and flux consumption.