Abstract
Chalcopyrite reacts readily with SO3 at about 100°C to form water-soluble sulfates; the reaction is approximately: 3CuFeS2+26SO3→3CuSO4+FeSO4+Fe2(SO4)3+25SO2 The presence of about 4 pct O2 in the gas phase greatly accelerates the reaction presumably due to the complete transformation of ferrous into ferric sulfate in an extremely porous form: 2CuFeS2+17SO3+1/2O2→2CuSO4+Fe2(SO4)3+16SO2 A stoichiometric mixture of SO2+1/2O2 behaves towards chalcopyrite in nearly the same way as SO3 although only in the temperature range 350° to 700°C.
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A. W. Sommer and H. H. Kellogg:Trans. TMS-AIME, 1959, vol. 215, pp. 742–44.
H. Jonas and H. Guth:German Patent 940115 (1956).
F. Habashi and R. Dugdale:Z. Anorg. Allgem. Chem., 1971, vol. 380, pp. 322–25.
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FATHI HABASHI and RAYMOND DUGDALE, formerly with the Anaconda Co., Tucson, Ariz.
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Habashi, F., Dugdale, R. The action of sulfur trioxide on chalcopyrite. Metall Trans 4, 1553–1556 (1973). https://doi.org/10.1007/BF02668007
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DOI: https://doi.org/10.1007/BF02668007