THE REDUCTION KINETICS OF Fe_3O_4-(xFeS·yCu_2S)-FeO-SiO_2 SYSTEM
by HUA Yixin; LIU Chunpen (Kunming Institute of Techology)
Cite this article:
by HUA Yixin; LIU Chunpen (Kunming Institute of Techology). THE REDUCTION KINETICS OF Fe_3O_4-(xFeS·yCu_2S)-FeO-SiO_2 SYSTEM. Acta Metall Sin, 1986, 22(6): 92-94.
Abstract The reduction kinetics of Fe_3O_4-(xFeS·yCu_2S)-FeO-SiO_2 system has been investigated against the slagging flux, silica granule size, mattegrade, initial magnetite content and temperature. The experimental results showed that the reaction rate increases with decreasing αFeO, matte grade and silica granule size as well as with increasing temperature. The reaction rate is controlled by the slagging reaction if the matte is saturated with Fe_3O_4, and by the reaction between S and O_2 in the melt if the matte is not saturated with Fe_3O_4. The corresponding rate equations can be expressed as: γSO_2=2.8×10~7exp(-154200/RT)W_(SiO_2)~(2/3)-α (1150-1300℃) γSO_2=3.1×10~8exp(-237900/RT)(%OFe_3O_4-b)~2(%S) (1200-1300℃) The activation energy for the reactions was found to be E_α=154.2 and E_b=237.9 kJ/mol respectively.
