The
study was devoted to the investigation of the influence of the carbon reducer’s
surface on the rate of the copper removal (in the form of a copper-reach alloy,
Cu-Pb-Fe) from the slag produced in the flash direct-to-blister process at the
Glogów smelter in Poland. The
slag used in this work was taken from the direct-to-blister Outokumpu flash
furnace at the smelter in Glogów. Graphite penetrators of different surfaces
were used as the slag reducer, and the experiments were carried out at 1573 K.
It was found that the rate of the de-coppering process of the “Glogów” slag
increased with the increase of the reducer’s surface. The rate of the copper reduction from the slag in
the form of Cu-Pb-Fe alloys was identified with the oxygen removal from this
slag and described by the equation:, where:—the number of the oxygen moles which could be
removed from the slag;S—the surface on which the reduction took place (it was
assumed that it is equal to the penetrator area);k—the rate constant;n—the
exponent. It
was found that the
reaction rate “constant” as well as the exponent n increased with the increase of
the superficial gas velocity, which was caused by the decrease in the gaps
between the crucibles and the graphite penetrators. Therefore, it can be
concluded that the reduction process was very likely controlled by the
convective mass transfer.
Cite this paper
Madej, P. and Kucharski, M. (2014). The Influence of the Carbon Surface on the Rate of Copper Recovery from Slag of the Direct-to-Blister Process. Open Access Library Journal, 1, e1057. doi: http://dx.doi.org/10.4236/oalib.1101057.
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, where:
—the number of the oxygen moles which could be
removed from the slag;S—the surface on which the reduction took place (it was
assumed that it is equal to the penetrator area);k—the rate constant;n—the
exponent. It
was found that the
reaction rate “constant” as well as the exponent n increased with the increase of
the superficial gas velocity, which was caused by the decrease in the gaps
between the crucibles and the graphite penetrators. Therefore, it can be
concluded that the reduction process was very likely controlled by the
convective mass transfer.