The effect of the composition of magnesia flux on the sinter structure and properties

The metallurgical properties of magnesian fluxes of the Khalilovo deposit with different ratios in the composition of magnesite and serpentine are studied. The results of laboratory study experiments the effect of magnesian fluxes properties of the Khalilovo deposit on the sinter production from the ore of the Kursk Magnetic Anomaly at the plant of JSC Ural Steel are presented. It is revealed that the use of experienced fluxes contributes to the sinter strength, increase the yield ratio and specific capacity. Thus, using experienced fluxes instead of Bakal siderite, an increase in the yield of sinter is provided by 3-5 % (rel.) as a result of acceleration of solid-phase reactions involving magnesite and serpentine. At the same time, the sinter productivity increases from 1.04 to 1.08-1.15 t / m²/h, that is, by 4-10% (rel.). The use of experienced magnesian fluxes supports to increase the drum strength of the sinter by 4-6 % abs. Improving the strength characteristics of the sinter when using the magnesian fluxes of the Khalilovo deposit is due to the formation of a "reinforcing" of hedenbergite solid solutions as well as homogenization of the solidifying melt and crystallization of it in the form of a glass phase of rankinite composition, which together limit the formation of β-Ca₂SiO₄. (paper)