|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Gasificating Dephosphorization During the Carbothermic Reduction of Medium Phosphorus Iron Ore Concentrate in Presence of Na2CO3 and SiO2
||Jing Zhang, Guoping Luo, Yanbiao Chen, Wenbin Xin, Jianguo Zhu
|On-Site Speaker (Planned)
To relieve the increasing lacking of high quality iron ore, the medium and high phosphorus refractory mineral resources are being developed worldwide due to the rich storage. The novel method of pre-reducing sinter process was applied to remove phosphorus, characterized by reduced atmosphere, high temperature and negative pressure. For medium phosphorus Bayan Obo iron ore concentrate, effect of carbon mixing ratio, reduction temperature and time on phosphorous gasification and iron metallization during carbothermic reduction was investigated using XRD, FESEM-EDS and FactSage software, in persence of Na2CO3 and SiO2. The optimal carbothermic reduction is conducted at 1050 °C for 60 min with 20 wt% carbon mixing ratio. The corresponding gasificating dephosphorization and iron metallization are 31% and 96%, respectively. Moreover, the further increased carbon mixing ratio and reduction temperature causes the large absorption of reduced phosphorus gas into metallic iron. Notably, the above result provides data support for pre-reducing sinter process.