cyanidation of gold ores containing antimony

DOI: 10.1016/J.MINPRO.2010.03.002 Corpus ID: 97276990; Cyanidation of gold ores containing copper, silver, lead, arsenic and antimony …

The gold content of the ore sample, coming from Bolivia, was of 10 g t−1 Au.After 24 h leaching time by direct cyanidation, low gold recovery was obtained (<20% Au), with a high reagent consumption.

In general, it is suitable for antimony containing refractory gold ores. The principle is that gold can be enriched into smelting product directly. The refractory gold ore with a high content of antimony (25.0–35.0% Sb, Au 30 g/t) is commonly used as an important raw material in the smelting of antimony . The melting products are antimony ...

A cyanidation study was conducted on a mild refractory gold ore sample from the Central zone of Clarence Stream Property, owned by Freewest Resources Canada, to develop a leaching strategy to ...

The presence of even small concentrations of antimony in gold-containing ores has a detrimental effect on the process of gold cyanidation. Antimonite undergoes oxidation, forming compounds such as antimonites (HSbO 3 2− ), antimonates (HSbO 4 2− ), thioantimonates (SbS 3 ), and others.

The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or silver from …

The insusceptibility of gold ores to conventional cyanidation is defined by its mineralogical information and exacerbated by the ... antimony and arsenic). These side reactions deplete

In this research, optimization of effective parameters for increasing gold recovery in Cyanidation process was carried out on …

Sulfur containing anions such as thioantimonates (SbS 3 3−) and sulfides (S 2−) are known to be strong 'poisons' in the cyanidation of gold (Nicol et al., 1987), and Fink and Putnam (1950) have shown that dissolved sulfide levels of as low as 0.5 mg/L can have a significant deleterious effect on rates of gold dissolution.. In many cases where …

Cyanidation tests on two ore samples from two different gold deposits are reported. The first sample contained 10.5 ppm gold with high arsenic and antimony. …

The presence of even small concentrations of antimony in gold-containing ores has a detrimental effect on the process of gold cyanidation. Antimonite …

Gold containing antimony ore is a type of refractory gold in which gold is intimately associated with stibnite (Guo et al., 2017). When the traditional cyanidation method is used for gold extraction, thioantimonate by stibnite decomposition reacts with oxygen to form antimony acid salt, or antimony

5.1 Introduction. Cyanide is a general term which refers to a group of chemicals whereby carbon and nitrogen combine to form compounds (CN – ). Cyanide leaching is currently the dominant process used by the minerals industry to extract gold (and silver ) from geological ores. Gold extraction is accomplished through the selective …

Preparation of Antimony Sulfide and Enrichment of Gold by Sulfuration–Volatilization from Electrodeposited Antimony. Electrodeposited antimony can be treated with sulfuration–volatilization technology, which causes antimony to volatilize in the form of antimony sulfide. During this process, gold is enriched in the….

Cyanidation of gold ores containing copper, silver, lead, arsenic and antimony ... contained 10.5 ppm gold with high arsenic and antimony. The second sample had a low …

3. Cyanidation of Complex Gold Ores and Concentrates The cyanidation process has become one of the most used methods for the recovery of gold from ores. The use of cyanide leaching for gold recovery is based on gold's properties, whereby gold does not become oxidized at ordinary temperatures. Additionally, gold is not soluble in sulphuric,

As a kind of refractory gold ore resources [3], deposit of carbonaceous gold ore account for more than 20% gold reserves over the world, containing more than 0.20% carbonaceous matter, Which ...

This research was carried out on Aghdareh gold ore. The Aghdareh mine and gold processing plant is located 32 km from Takab city in the western Azerbaijan province, Iran, at 46°58′30′′N and 36°39′29′′E. The grade of gold ore is 3 ppm. Also, cyanide leaching is used to process gold in the Aghdareh mine . The main problem in ...

Aurostibite, a gold antimony compound, is particularly known to be insoluble in cyanide solution. The antimony dissolves in cyanide solution to form antimonates, which retards gold dissolution. ... Gold ores containing stibnite are usually processed at a pH lower than 10 to avoid the dissolution of antimony that precipitates gold in solution ...

The association of gold and antimony in many ores provides additional complications in the gold extraction process. Improvements in mineralogical …

Arsenic and antimony are environmental pollutants associated with several diseases, including skin cancer. One of the main sources of both elements is the oxidation of sulphide minerals, particularly arsenopyrite and therefore any of both elements is a concern in gold mining operations because arsenic- and antimony-bearing sulphides …

In this research, optimization of effective parameters for increasing gold recovery in Cyanidation process was carried out on Hamzeh-Qarnein gold ore containing 0.8 ppm gold. Accordingly, the effect of parameters such as particle size (d 80), pH, cyanide concentration, and leaching time on the gold recovery examined through agitation …

Dissolution of elemental sulfur in sodium hydroxide can also used as a lixiviant for alkaline sulfide leaching of antimony (Anderson and Krys, 1993). The combination of sodium hydroxide and elemental sulfur results in the formation of metastable species other than just sulfide (S2−). Both polysulfide (SX 2–) and thiosulfate (S2O32–) are ...

The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or silver from these sources, which are named ...

Thin gold inclusion in rock-forming minerals is the most common cause of hardness of such ores; and a significant arsenic, antimony and iron compounds content increases the operating costs on its ...

Cyanidation, a process used for over a century to extract gold from free milling ores, is so effective that it can economically treat low-grade ores (0.5 g/t Au). The concentration of cyanide added to dissolve gold is much higher than the stoichiometric requirement because of various interferences. The occurrence and composition of the …

An investigation was carried out on synthetic ores containing high purity pyrite, pyrrhotite and chalcopyrite and on two gold ores currently processed to evaluate the impact of cyanicides on ...

It can be seen from Eq. () that Sb 2 S 3 is deposited on the surface of gold particles, forming a dense product layer and hindering the diffusion of CN − and O 2 to the gold particles, leading to low leaching ratio [3, 4].Effect of Antimony on Pretreatment Process. The melting point of antimony compounds, generated in the roasting process …

Direct cyanide leaching of copper-bearing gold ores/concentrates results in low gold extractions (<80%) with high consumption of cyanide due to the ready dissolution of some copper minerals in ...