Abstract

OROZCO, Ivana Marcela; BAZAN, Vanesa Lucia; DIAZ, Andrea Alejandra  and  LARA, Rodolfo Francisco. Roasting of sulphide using carbothermal reduction. Dyna rev.fac.nac.minas [online]. 2016, vol.83, n.198, pp.228-234. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v83n198.50769.

The carbothermic reduction process is a direct reduction of sulfides. It allows a roasting in which higher concentrations of metals such as molybdenum are obtained by using both a reducing agent (in this case, carbon C) and a sulfur scavenger, such as CaO so as to prevent air toxic gases pollution such as SO₂. In this paper, we analyze sulfur concentrates rich in copper, iron, and molybdenum that are obtained through rougher flotation and differential floats, which give rise to different laws. The concentrates were subjected to a carbothermic reduction process in which the working parameters were studied. The values of both the capturing agent and the reducing agent were adjusted to retain higher concentrations of sulfur. Analyzing the results obtained, the temperature was set and we reached the optimal working time and optimum molar ratio of CaO and C for the greatest recovery of metals such as molybdenum.

Keywords : carbothermic reduction; sulfides; roasting.

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