Abstract
The present study is concerned with the pre-reduction process of some manganese ores using CO, H2 and C as a reducing agent, respectively. The multi-techniques of TG, DTA and DTGA (Differential Thermal Gas Analysis) were used for more hight precision measurements. MnO2 or Mn2O3 phase in manganese ore is continuously converted into lower oxides under a suitable condition of temperature and oxygen partial pressures. MnO phase is obtained easily in the reduction process up to about 1273K. The reduction of MnFe2O4 which yields MnO-FeO phase also investigated by the examination of X-ray diffraction.
