Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation

Jesus Leobardo Valenzuela.García; Soto Uribe Juan Carlos; Martín Antonio Encinas Romero; Guillermo del Carmen Tiburcio Munive; Víctor Manuel Vázquez Vázquez; José R. Parga-Torres

doi:10.3390/min13010116

Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation

Título traducido de la contribución: Extracción de Oro de un mineral sulfuro concentrado refractario por medio de Oxidación / Lixiviación simultánea a presión

Jesus Leobardo Valenzuela.García^*, Soto Uribe Juan Carlos^*, Martín Antonio Encinas Romero, Guillermo del Carmen Tiburcio Munive, Víctor Manuel Vázquez Vázquez, José R. Parga-Torres

^*Autor correspondiente de este trabajo

Departamento de Ingeniería Química y Metalurgia

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

Resumen

Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus,
precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous
pressure oxidation and cyanidation. The effectiveness of this process of extraction can be influenced
by the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conducted
experiments to characterize the effects on gold extraction of ores using a range of sodium cyanide
concentrations (1–8 g/L), temperatures (40–75 C), and oxygen pressures (0.5–1.1 MPa). Characterization
of the ores showed that pyrite and quartz were the main minerals present in the concentrate.
The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of
0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 C, along with a constant stirring speed of
600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.

Título traducido de la contribución	Extracción de Oro de un mineral sulfuro concentrado refractario por medio de Oxidación / Lixiviación simultánea a presión
Idioma original	Inglés
Número de artículo	13
Páginas (desde-hasta)	1
Número de páginas	11
Publicación	Minerals
Volumen	13
N.º	116
DOI	https://doi.org/10.3390/min13010116
Estado	Publicada - 12 ene. 2023

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10.3390/min13010116

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@article{258b450baef84bef9f3beac8d3ee319a,

title = "Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation",

abstract = "Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus,precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneouspressure oxidation and cyanidation. The effectiveness of this process of extraction can be influencedby the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conductedexperiments to characterize the effects on gold extraction of ores using a range of sodium cyanideconcentrations (1–8 g/L), temperatures (40–75 C), and oxygen pressures (0.5–1.1 MPa). Characterizationof the ores showed that pyrite and quartz were the main minerals present in the concentrate.The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 C, along with a constant stirring speed of600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.",

author = "Valenzuela.Garc{\'i}a, {Jesus Leobardo} and {Juan Carlos}, {Soto Uribe} and {Encinas Romero}, {Mart{\'i}n Antonio} and {Tiburcio Munive}, {Guillermo del Carmen} and {V{\'a}zquez V{\'a}zquez}, {V{\'i}ctor Manuel} and Parga-Torres, {Jos{\'e} R.}",

year = "2023",

month = jan,

day = "12",

doi = "10.3390/min13010116",

language = "Ingl{\'e}s",

volume = "13",

pages = "1",

journal = "Minerals",

issn = "2075-163X",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "116",

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TY - JOUR

T1 - Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation

AU - Valenzuela.García, Jesus Leobardo

AU - Juan Carlos, Soto Uribe

AU - Encinas Romero, Martín Antonio

AU - Tiburcio Munive, Guillermo del Carmen

AU - Vázquez Vázquez, Víctor Manuel

AU - Parga-Torres, José R.

PY - 2023/1/12

Y1 - 2023/1/12

N2 - Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus,precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneouspressure oxidation and cyanidation. The effectiveness of this process of extraction can be influencedby the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conductedexperiments to characterize the effects on gold extraction of ores using a range of sodium cyanideconcentrations (1–8 g/L), temperatures (40–75 C), and oxygen pressures (0.5–1.1 MPa). Characterizationof the ores showed that pyrite and quartz were the main minerals present in the concentrate.The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 C, along with a constant stirring speed of600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.

AB - Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus,precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneouspressure oxidation and cyanidation. The effectiveness of this process of extraction can be influencedby the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conductedexperiments to characterize the effects on gold extraction of ores using a range of sodium cyanideconcentrations (1–8 g/L), temperatures (40–75 C), and oxygen pressures (0.5–1.1 MPa). Characterizationof the ores showed that pyrite and quartz were the main minerals present in the concentrate.The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 C, along with a constant stirring speed of600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.

U2 - 10.3390/min13010116

DO - 10.3390/min13010116

M3 - Artículo

SN - 2075-163X

VL - 13

SP - 1

JO - Minerals

JF - Minerals

IS - 116

M1 - 13

ER -