Effect of High Temperature Reconstruction and Modification on Phase Composition and Structure of Steel Slag

This study investigates the pattern of influence blast furnace slag tempering on composition and structure steel slag. The chemical composition, equilibrium phase microscopic morphological characteristics elemental regions modified by high temperature reconstruction were analyzed using X-ray diffractometer (XRD), FactSage7.1 thermodynamic analysis software, mineral microscopy field emission scanning electron microscopy. results show that blending can promote generation a low melting point in slag, as well reducing its improving kinetic conditions. On one hand, incorporation was found to C2S improve gelling activity. Notably, at 1400 °C, content (mass fraction) with 15% reached 39.04%, while unmodified this only 16.92%, i.e., 1/4 other inhibited a-C2S-C3P calcium ferrate minerals, refined grains calcium–aluminum yellow feldspar, reduced alkalinity promoted silicate phases hydration activity