Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
ECCLESTON, E. and WHITE, J.. Development of roasting parameters for the ConRoast process with low-sulphur feedstock. J. S. Afr. Inst. Min. Metall. [online]. 2009, vol.109, n.1, pp. 65-69. ISSN 2411-9717.
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.