Estudio de mecanismos de reducción heterogénea sólido-gas a alta temperatura de ferrita cúprica con monóxido de carbono

A. Quiero; I. Wilkomirsky

doi:10.3989/revmetalm.2003.v39.i6.357

Study of mechanisms of heterogeneous reduction solid-gas at high temperature of copper ferrite with carbon monoxide

Authors

A. Quiero Departamento de Metalurgia, Universidad Arturo Prat
I. Wilkomirsky Departamento de Metalurgia, Universidad de Concepción

DOI:

https://doi.org/10.3989/revmetalm.2003.v39.i6.357

Keywords:

Mechanism, Reduction, Copper, Ferrite, CO

Abstract

The mechanism of copper ferrite reduction in the carbon monoxide system, is investigated in this work. Tests were carried out in a horizontal reactor at 850 °C under the following parameters were studied: coarse particles (5 to 10 mm), ratio CO/(CO+CO₂) of 0.50 and time of reaction of 1, 5, 15, 30 and 60 min. Based on analysis by micrographies and electron microprobe for the partially reacted particles it allows to propose global mechanism of reduction in which metallic copper is formed by means of two simultaneous mechanisms. One pathway by sequential transformation of tenorite and cuprite CuO*Fe₂O₃ —> Cu₂O —> Cu and the another pathway by intermediates of poly-spinels CuO*Fe₂O₃ —> CuO_0,5Fe_2,5O₄ —> Cu_xFe_3-xO₄ —> Cu. Likewise, the iron is reduced across two simultaneous mechanisms, route CuO*Fe₂O₃ —> CuO_0,5Fe_2,5O₄ —> Fe₂O₃ —> Fe₃O₄ —> FeO or following the route CuO*Fe₂O₃ —> Cu_0,5Fe_2,5O₄ —> Cu_xFe_3-xO₄ —> Fe₃O₄ —> FeO.

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Published

2003-12-30

How to Cite

Quiero, A., & Wilkomirsky, I. (2003). Study of mechanisms of heterogeneous reduction solid-gas at high temperature of copper ferrite with carbon monoxide. Revista De Metalurgia, 39(6), 428–442. https://doi.org/10.3989/revmetalm.2003.v39.i6.357

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Issue

Vol. 39 No. 6 (2003)

Section

Articles

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