| Autor: |
Vusikhis, A. S., Selivanov, E. N., Leont'ev, L. I. |
| Zdroj: |
Russian Metallurgy (Metally); Aug2022, Vol. 2022 Issue 8, p881-886, 6p |
| Abstrakt: |
To describe the joint reduction of iron and copper from the oxide melt (1273–1773 K) of the B2O3–CaO–FeO–CuO system with carbon monoxide and hydrogen, we used thermodynamic modeling in the approximation to open systems, with fractional introduction of CO (H2) and periodic removal of metal phases and gases from the composition of the working fluid. The calculations are carried out taking into account the disproportionation of FeO into Fe and Fe3O4. For the considered compositions of the melt having a FeO/CuO ratio of 10, the disproportionation of the lower iron oxide and its interaction with CuO makes it possible to transform copper into the metallic state by 20–80% at low temperatures. The dependences of the contents of iron and copper oxides in the oxide melt, the degrees of their reduction, and the composition of the resulting alloy on the temperature and the amount of the introduced reducing agent are revealed. The required amount of hydrogen for the reduction of the metals to a fixed degree of copper metallization is shown to be significantly lower than that of carbon monoxide. The information obtained is useful for predicting thermoextraction processes occurring during the extraction of valuable components from nonferrous metallurgy slags. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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