COMPARATIVE STUDY OF GOLD EXTRACTION FROM REFRACTORY PYRITIC ORES THROUGH CONVENTIONAL LEACHING AND SIMULTANEOUS PRESSURE LEACHING/OXIDATION. GOLD EXTRACTION FROM REFRACTORY PYRITIC ORES THROUGH SIMULTANEOUS PRESSURE LEACHING/OXIDATION.

Jesus L Valenzuela, Maria Mercedes Salazar Campoy, Luis Sergio Quiroz-Castillo, Patricia Guerrero Germán, Martín Antonio Encinas Romero, Guillermo del Carmen Tiburcio Munive, Jose Refugio Parga Torres

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Pressure oxidation is a hydrometallurgical oxidative pretreatment for refractory ores, such as sulfide ores. Here, simultaneous alkaline pressure oxidation and sodium cyanide leaching treatments were carried out on a pyritic ore from the Mulatos Mine located in Sahuaripa, Sonora, Mexico. Mineral characterization, agitation leaching, hot cyanidation under atmospheric pressure conditions, simultaneous moderated pressure oxidation and leaching, and kinetic testing results are shown. The modified variables were temperature, pressure, and cyanide concentration. Characterization indicated that pyrite was the main mineral. Simultaneous pressure oxidation and leaching experiments were conducted at a temperature range of 40–80 °C, oxygen pressure of 87.5–200 psi, and cyanide concentration of 0.8–1.2 wt% in a 2-L Parr pressure reactor. A dissolution rate of 81–86% was achieved under the following conditions: 87.5 psi, 80 °C, 0.8 wt% NaCN, for 1 h.
Translated title of the contributionEstudio Comparativo de la Extracción d eOro de Minerales Piríticos Refractarios utilizando Lixiviación Convencional y Simultánea Oxidación y Lixiviación a Presión
Original languageEnglish
Article numberdoi.org/10.1007/s42461-020-00217-6
Pages (from-to)1-6
Number of pages6
JournalMINING, METALLURGY AND EXPLORATION
Volume2
Issue number1
DOIs
StatePublished - 6 May 2020

Keywords

  • Gold extraction
  • Oxidation
  • Pressure leaching
  • Pyritic ores
  • Refractory ores

Cite this