The Effect of SiC on the Phase Composition and Structure of Mixed Slag

In order to investigate the influence of SiC on composition and structure mixed slag (blast-furnace slag: steel = 1:9), chemical composition, equilibrium-phase microscopic morphological characteristics elemental distribution in region SiC-reagent-tempered samples were analyzed by X-ray diffractometer (XRD), FactSage7.1 thermodynamic analysis software, scanning electron microscope, energy spectrum analyzer. It was found that main physical phases tempered magnesia–silica–calcite (Ca3Mg(SiO4)2, C3MS2), calcium–aluminum yellow feldspar (Ca2Al2SiO7, C2AS), C2S, iron alloy. Theoretical calculations suggest experimental temperature should be higher than 1500 °C facilitate combination P5+ with Fe Mn liquid phase form an alloy, reduce content slag, create conditions for self-powdering conditioned slag. The doping reagent can increase line binary basicity phase; temperatures 1150 °C, 1200 1300 basicities 4.68, 4.13, 3.10 amounts 3%, 4%, 5% reagent, respectively. doped 4% achieves reduction ferroalloys during air-cooling cooling processes, realizing purpose “resource utilization” blast-furnace