College of Materials and Metallurgy;
Guizhou University;
Guiyang;
550025;
Guizhou;
China;
School of Minerals Processing and Bioengineering;
Central South University;
Changsha;
410083;
Hunan;
China;
Sinosteel Equipment&Engineering Co.;
Ltd.;
Beijing;
100080;
China;
Ultrafine high-grade magnetite concentrate; Basicity; Metallurgical performance; Reduction behavior; Gas-based shaft furnace direct reduction; Fired pellet;