ABSTRACT
The sinter qualities are decided by the bonding and structure formed following the physical-chemical reactions among the constituting minerals of the mix during sintering, as well as in the cooling stages. The major mineral constituents in sinter, namely, hematite, magnetite, ferrites, and silicates, and their changes with respect to the sinter basicity are outlined. The formation of silicon-ferrite of calcium and aluminum (SFCA) through the sequence of sintering reactions and their compositional changes with respect to the solids assimilated are described. The distribution of the mineral phase under different flame front speeds (also bed height effects) is mentioned. The magnetite mineral is converted to hematite during the cooling cycle and depends on the oxygen potential. The formation of bonding phases out of the melt generated in the reaction zone is discussed. The Chapter also outlines the sinter porosity and morphological characteristics of sinter and their effect on the sinter quality parameters.
