This research allowed us to evaluate the behavior of an oxidized ore from the Cerro El Toro – Huamachuco -Province of Sanchez Carrion-La Libertad, using thiourea as an effective alternative that replaces a1 cyanide leaching gold, justifying this research to minimize environmental pollution and increase the percentage of gold extraction or maintain cyanide obtained, but with the advantage of rapid dissolution rate under leaching times and especially controlled acid pH with citric acid (C₆H₈O₇) and this Finally an organic acid which replaces sulfuric acid (H₂SO₄) in a normal process of leaching. The particle size of the oxidized ore was 100% solids and mesh # 200 and the tests were performed in the laboratory mineral processing metallurgical engineering department at the National University of Trujillo. In the experimental part, tests were performed on the electric agitator, wh...