Thermal analysis in examinations of reduction of mixtures of acidic pellets and high-basicity sinters

The aim of this work was to investigate the application of mixtures of high -basicity sinters and acidic pellets in blast furnace charges. The ratio of high-basicity sinter and pellets depends on the nature and bas icity of the latter, and is established in order to secure desired properti es of the slag and sufficient reducibility and mechanical strength of the f urnace charge. Such a composition of the charge leads to a considerable cos t decrease related to coke saving, the elimination of fluxes and a decrease in air pollution. Examinations of phase composition and physicochemical properties of the sin ters and pellets as separate materials were carried out. The effect of the mineral composition of sinters with a basicity of 1.7-2.0 on the reducibili ty was determined. Sinters of different basicities (CaO/SiO2=1.7; 2.0) mixed with pellets from Poltawavere reduced in a CO/CO2 gas mixture. The reduction process was fol lowed by thermal analysis.