Reaction Characteristics and Existing Form of Phosphorus during Coal-Based Reduction of Oolitic Iron Ore

It is particularly significant to investigate the reduction behavior and existing form of phosphorus in metal slag phase during coal-based for efficient development utilization high-phosphorus oolitic hematite. The minerals their high hematite were systematically investigated using HSC software simulation, thermodynamic calculation, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS). results show that after Fe2O3 was reduced iron, apatite promoted by providing most inclined enrichment site (metallographic phase). Phosphorus existed mainly two forms phase—one Fe3P compound at boundary phase, other solid solution iron. There incompletely reacted apatite, formed as CaO–SiO2–P2O5 solution. In early stage reduction, while later stage, it