In the southern part of Peru, it is found Zn-Pb-Cu-Ag-Au mix ore carbonate deposits and polymetallic sulfides in volcanic rocks. It is known that such types of ores are difficult to process, so this ore was tested by leaching using solutions containing hydrogen peroxide and ammonia (H2O2 / NH3); which are, respectively, the oxidant and the complexings agent. Lab work was done with a mix ore, (oxides and sulfides), containing copper, silver, gold and zinc in the form of chalcopyrite, bornite, brochantite, proustite, marmatite, pyrite and few amounts of lead oxide; gangue, basically carbonates. Using H2O2 / NH3, and pH fixed between 9 to 10, metallic recovery was gotten close to 90 % for copper, gold, silver and zinc. Lead and iron do not dissolve in alkaline solution. Metals recovery was done by redox cementation with metallic zinc, which allowed gold, silver, and copper precipitation, th...

The arsenopyrite, FeAsS, it is a mineral that is commonly found associated with gold. In this kind of mineral, Gold is presented in sub-microscopic size particles, encapsulated in a matrix of the same mineral or forming a solid solution, this does not allow the recovery of gold with the available lixiviation techniques. Moreover, a fine grinding does not a chive to break the matrix in which the gold is located, not allowing the lixiviation solutions to come in. Some alternatives that lead to the recovery of gold from those minerals include chemical oxidation, oxidation under pressure, bacterial oxidation and roasting oxidation (which is very polluting due to the emission of As2O3 y SO2 gases. The aim of the following study is to identify the conditions to break the arsenopyrite matrix for continuing the usual process of cianuration. For doing so, experiments were carried out containing a...

La arsenopirita, FeAsS, es un mineral que se encuentra frecuentemente en asociación con oro. En este tipo de mineral, el oro se suele encontrar en forma sub-microscópica, encapsulado en la matriz del mismo mineral, o bien constituyendo una solución sólida, lo cual dificulta o impide la recuperación del oro mediante las técnicas disponibles de lixiviación. Inclusive, una molienda muy fina no logra romper la matriz en la que se encuentra el oro, inhabilitando el acceso a las soluciones de lixiviación. Algunas alternativas conducentes a la recuperación de oro a partir de aquellos minerales, consisten en oxidación química, oxidación a presión, oxidación bacteriana y tostación oxidante (muy contaminante por generación de gases de As2O3 y SO2). El presente estudio pretende identificar las condiciones para ruptura de la matriz de la arsenopirita para con ello continuar con el pr...

The mining industry of porphyry copper deposits process complex and low-grade minerals (Romero Toledo et al., 2017). One of the problems related to this practice, is the type of mineral, harming the mining - metallurgical treatment that affects the consumption of excessive energy and the critical recovery of economic minerals (Mudd, 2010). The objective of the research was to analyze the mineralogical characterization; then to contrast the behavior of the minerals in the process of flotation of minerals in the porphyry deposits of copper and with it to implement improvements (Díaz Villena, 2017). The techniques used were X-ray diffraction, optical-electronic microscopy (Manzaneda Cabala, 2010) and chemical analysis. They provided reliability and support to determine qualitatively and quantitatively the mineral phases that cause problems in the flotation of copper minerals  (Donoso ...