Abstract

SANTAMARIA RONCANCIO, José Isaí; TORRES GOMEZ, Robinson de Jesús; PARRA PINILLA, Mario  and  ORTIZ OTALORA, César Armando. Comparison Between Cyanide and Thiourea, as Leaching Agents of a Colombian Gold Ore. Rev. Fac. ing. [online]. 2013, vol.22, n.34, pp.97-103. ISSN 0121-1129.

A preliminary study was made by leaching gold from a gold ore from Marmato (Departament of Caldas). As leaching agents were used thiourea and sodic cyanide. The study was divided into three stages: The first one, was the ore characterization by X-ray diffraction (XRD), plus gold fire essay and a quantification by Atomic Absorption (AA). In the second stage, leaching was carried out, on mineral samples agents of 100 g during 8 hours, with agitation at 800 rpm and environmental temperature, taking solution samples at controlled time intervals. Third, an analysis of the gold extraction yields. The thiourea leaching tests out performed the cyanide ones.

Keywords : Leaching; Leaching Agents; Thiourea; Cyanide; Gold.

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