Effect of the Carbon Mixing Ratio on Mineral Evolution and Gasification Dephosphorization during the Pre-reduction Sintering Process of Bayan Obo Iron Ore Concentrate

The pre-reduction sintering process is an effective measure to fundamentally solve the detrimental circulating accumulation of phosphorus in iron- and steel-making procedures. effect carbon mixing ratio on mineral evolution, gasification dephosphorization degree products was primarily investigated based occurrence status Bayan Obo iron ore concentrate. obtained results indicated that oxide dominantly transformed from magnetite into wüstite, metallic basically not detected. Regarding silicate slag, precipitated dendritic phase accounted for a higher content FeO MgO lower Na2O + K2O SiO2 over vitreous matrix phase. Moreover, as increased 5 25 wt%, first 11.3% 30.7%, respectively, 70.0% 67.4%, due enhanced reducing atmosphere then decreased 45.0% 59.0%, led by liquid slag reduced permeability burden layer. Both maximum values were at 20 wt% ratio. Furthermore, raw materials blast furnaces could only largely reduce hot metal but also dramatically decrease coke usage dioxide emissions, which be highly beneficial realize peaking neutrality.