|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||D-44: The Effect of Temperature and Additive on Transport and Transformation of P of High-phosphorus Iron Ore during Carbothermic Reduction
||Yuanyuan Zhang, Qingguo Xue, Guang Wang, Jingsong Wang
|On-Site Speaker (Planned)
Due to complicated structure and composition of high-phosphorus iron ore, pure substances were used to simulate the chemical composition of high-phosphorus iron ore to study the reaction of fluorapatite at different temperatures and effect of additives. The gasification process of P during carbothermic reduction process was investigated using a quadrupole mass spectrometer gas analysis. It is found fluorapatite was reduced to phosphorus which diffused into iron and gas phase. From the gas analysis, it was observed that PO gas species were vaporized around 700℃-800℃ temperature range and P gas were vaporized above 1000℃. As the reduction temperature increased, the diffusion of phosphorus into iron was enhanced. The presence of Ca(OH)2 and Na2CO3 as additives not only promoted the reduction of iron oxide, but also decreased the degree of fluorapatite reaction to inhibit P into iron .