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Journal of the Southern African Institute of Mining and Metallurgy

versão On-line ISSN 2411-9717
versão impressa ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.109 no.1 Johannesburg Jan. 2009




Development of roasting parameters for the ConRoast process with low-sulphur feedstock



E. EcclestonI; J. WhiteII

ITechnip USA Inc
IIHazen Research Inc




The ConRoast process for the production of platinum group metals involves the use of a fluidized bed reactor for the removal of sulphur from ore concentrates by roasting prior to smelting in a DC-arc furnace. Test work was carried out in 2007 at Hazen Research in Golden, Colorado to provide the data necessary for a commercial roaster to be designed by Technip. This paper discusses the rationale behind the test work, the goals for calcine composition to be used as smelting furnace feed, the results of various roaster operating parameters in terms of calcine composition (particularly residual sulphur and the fate of trace elements), and the impact of the results in terms of a commercial roaster design.



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1. JONES, R.T. DC arc smelting of dead-roasted sulphide concentrates, Sulphide Smelting. Stephens R.L. and Sohn H.Y. (eds.), TMS, Seattle, 17-21 February 2002, pp. 435-456.         [ Links ]

2. JONES, R.T., BARCZA, N.A., KAIURA, G., O'CONNELL, G., and HANNAFORD, T. Treatment of metal sulphide concentrates by roasting and arc furnace reduction, US patent 6,699,302 (March 2004).         [ Links ]

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