Resumo

GAVIRIA C., ANA C.; GONZALEZ, JORGE  e  MORA, HERMES F.. USING MICROWAVES IN AURIFEROUS REFRACTORY MENAS AND THEIR EFFECT IN THE EXTRACTION OF GOLD. Dyna rev.fac.nac.minas [online]. 2006, vol.73, n.150, pp.29-37. ISSN 0012-7353.

This paper presents the answer of two different minerals, considered like refractory in the extractive process of Gold, to the application of the oxidating pre-treatment using microwaves, like power plant to generate the heat of transformation of sulfides to oxides and, once applied the pre-cure, the mineral is put under the leaching with sódico cyanide, under conventional conditions, with the intention of showing the mineral effect that this process has on minerals or species that cause the refractory. The minerals coming from the mine the Roble and the Zancudo, which present a physical and chemical refractory, due to the associations of gold, their presentation and to consuming the cyanide mineral presence Cyanide and oxygenate, multiway whose 2450 frequency is of MHz and one power of 1000 W were exposed to the microwaves within a cavity; managing to oxidize more of 90% of sulfides in a time nonsuperior to the 10 minutes. Finally it was possible to be concluded from the experimental phase, that the energy microwave has a great potential in the field of the extractive metallurgy, specially in auriferous the refractory menas.

Palavras-chave : Mineral; Microwaves; Refractory; Oxidating pre-treatment; Roasting; Gold; Receive.

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