|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||D-39: Mineral Composition and Microstructure Changes of Iron Ore Sinter during the Gas-Solid Reduction
||Xia Zhao, Ze-jun Ma, Yan-juan Yang, Yong Zhao, Wen Pan
|On-Site Speaker (Planned)
Characteristics of the gas-solid reduction reaction between iron ore sinter and CO gas at 1273 K were studied with Thermal-Gravity analyzer. The micro-structure, mineral compositions and porosity of sample before reduction, 30 % reduced sample, 70 % reduced sample and fully reduced sample were investigated. At the reduction degree of 30 %, the hematite and calcium ferrite was reduced to 44.4 % and 60.4 % respectively. At the reduction degree of 70 %, all the hematite, calcium ferrite and magnetite were reduced to metal iron, only 36 % wustite was left in the core area. The reduction reaction began with the loose structures and spread to the nearby area. In the area of micro-pores, the reducing gas can easily diffuse to the reaction interface to proceed the reduction reaction effectively. So increasing the content of micro-pores is an effective way to improve the reducibility of the sinter.