%0 Journal Article
%T Occurrence and speciation of copper in slags obtained during the pyrometallurgical processing of chalcopyrite concentrates at the Huelva smelter (Spain)
%A Fern¨¢ndez-Caliani J.C.
%A R¨ªos G.
%A Mart¨ªnez J.
%A Jim¨¦nez F.
%J Journal of Mining and Metallurgy, Section B : Metallurgy
%D 2012
%I Technical Faculty, Bor
%R 10.2298/jmmb111111027f
%X Slags involved in smelting-converting-refining operations to produce blister copper at the Atlantic Copper smelter, in Huelva (Spain), have been investigated by quantitative electron microprobe analysis, X-ray diffraction and digital imaging techniques. The results showed that mechanically entrapped matte particles are the dominant copper losses in the slags. The largest proportion of Cubearing particles (2.0-3.5 vol %) is present in the magnetite-rich converter slags, due to the negative effect of viscosity on coalescence and precipitation of copper matte during conversion. They consist of high-grade matte particles with a core of copper metal rimmed by a copper sulfide phase (Cu2S). The mechanical entrainment of copper matte by slags from both the flash and electric furnaces resulted in copper losses accounting for less than 1.5 vol %, mostly occurring as tiny particles with a stoichiometric composition close to that of bornite (Cu5FeS4). Copper was not found to be enriched in fayalite and magnetite as solid solution.
%K smelting
%K matte conversion
%K slag
%K copper
%K chalcopyrite
%U http://www.doiserbia.nb.rs/img/doi/1450-5339/2012/1450-53391200027F.pdf