Hydrometallurgical treatment of disseminated gold in pyrite and arsenopyrite

• Autores: Azañero Ortiz, Angel, Núñez Jara, Pablo Antonio, Aramburú Rojas, Vidal, León Delgado, Elard, Fernández Salinas, Sosimo, Orihuela Salazar, Luis, Palomino Reyna, Jackeline, Romero Manzanares, Antonio
• Formato: artículo
• Fecha de Publicación: 2009
• Institución: Universidad Nacional Mayor de San Marcos
• Repositorio: Revistas - Universidad Nacional Mayor de San Marcos
• Lenguaje: español
• OAI Identifier: oai:revistasinvestigacion.unmsm.edu.pe:article/2760
• Enlace del recurso: https://revistasinvestigacion.unmsm.edu.pe/index.php/iigeo/article/view/2760
• Nivel de acceso: acceso abierto
• Materia: Hidrometalurgia del oro en pirita y arsenopirita; Hidrometallurgy of gold; pyrite; arsenopyrite

The ore is complex and presents abundant content of sulphurs: pyrite, arsenopyrite and pyrrhotite, also in few proportion: chalcopyrite, sphalerite and probably sulfhosals that add: copper, silver, arsenic and antimony. Free gold is not appreciated in the obtained results, the major content of gold is in tails of flotation Cu-Ag, constituted by sulphurs of iron, as a non metallic residue prevails the quartz, coal and the insolubles, it is quite strong and naturally very acid, pH:5.3. It is possible to obtain a concentrate of flotation Cu-Ag, with As and Sb like pollutants and around 80% of the total gold stays in tails, to which we effect a direct cyanidation having variant like pH and granulometry, it has not been possible to leach more than 11 % of the gold contained in tails that gives 3.2 grams Au/TM, considering the current prices it has an approximate value 100 US $ Ton.