Calculation of the Reduction Rate of Copper, Nickel, and Cobalt
from Oxide Melts by Carbon(II) Oxide

S. A. Lyamkin^a,*, E. N. Selivanov^a,*, and N. S. Semenova^b

^aInstitute of Metallurgy, Ural Branch, Russian Academy of Sciences, ul. Amundsena 101, Yekaterinburg, 620016 Russia

^bUral Federal University, ul. Mira 19, Yekaterinburg, 620002 Russia

*e-mail: pcmlab@mail.ru

Abstract—The kinetic equation for the calculation of the reduction rate, which takes into account the physic-
ochemical properties of contacting phases, is derived under the assumption of the electrochemical nature of
interaction between the reducing gas (CO) and the oxide melt. Satisfactory agreement of calculated and exper-
imental data is shown by the example of the interaction of the oxide melt of the CaO–SiO₂–Al₂O₃ system con-
taining up to 6.0 wt % Me_nO_m (NiO, CoO, Cu₂O) blown by the gas phase with partial pressure P_CO=(0.4–5.0)
10² MPa at T = 1623 K.

Keywords: rate calculation, reduction, oxide melt, metal cations, carbon monoxide

DOI: 10.3103/S1067821214030092

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.