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By G. S. Dobby, S. R. Rao

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Extra resources for Processing of Complex Ores. Proceedings of the International Symposium on Processing of Complex Ores, Halifax, August 20–24, 1989

Sample text

Redox potential of the X /X 2 system (E ) was r calculated according to Rao (1971). Some adsorption peaks can be seen for chalcocite on all curves, which appear above -450 mV. There occur also peaks connected with xanthate oxidation /at -230 mV for ethyl xanthate (Kowal and Pomianowski, 1973)/ and electrode surface oxidation at higher potential range. For xanthat-es with 6, 8 and 10 carbon atoms in alkyl chain sharp oxidation peaks are not observed, but anodic current rises slowly. —IC-R--HCJCO - H C T D H CJ -H œ i - t o c D c r s c o o u xzeD-HO-i-HCDcna en · Η ■H O O t-< · — O ^ U ' H H - F U C Ö H X - P S E t n r - I O O «M CLw - F Q ) t H CD C C O O O -M O CO CD O O .

ACKNOWLEDGEMENT The authors wish to acknowledge the financial support of American Cyanamid Company. They are also grateful to Beth Howell and Saundra Hutchison for reading and typing the manuscript. REFERENCES Allison, S. , Goold, L. , Nicol, M. J. and Granville, A. (1972) A determination of the products of reactions between various sulfide minerals and aqueous xanthate solution, and a correlation of the products with electrode rest potentials, Metall. Trans. 2» 2613-2618. Bellamy, L. J. (1975).

Monies, A. Komosa,and J. Szczypa (1988). XVI Internation a l Mineral Processing Congres. In E. ), Flotation of fine chalcocite grains by means of long-chain xanthates. , Amsterdam, pp. 1155-1161. Janusz, W. R. Sprycha, and J. Szczypa (1989). The method and apparatous for particle size and sedimentation análisis by gamma-ray absorption. Submited to publication. I. (1957). Proceding of Second International Congress on Surface Activity. H. ), Physicochemical properties of some flotation reagents and their salts with ions of heavy non-ferrous metals, Vol.

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