Processing technologies for gold-telluride ores

Gold telluride ores are important gold refractory ores due to the presence of sulfides and other gangue materials. The classification and main physical properties of gold …

Processing technologies for gold-telluride ores

Tellurium could be pre-leached from the telluride-type gold flotation concentrate through the Na2S + NaOH alkaline leaching process to achieve the effective separation of tellurium from noble metals, which, when eliminating the adverse effects ofTelluride on the leaching of gold and silver, provides new ideas for the extraction of rare elementtellurium.

Treatment of Gold–Telluride Ores

The simplest and most common association of tellurium with gold is as the mineral calaverite [AuTe 2], but other metal associations also occur.Silver associations give rise to the minerals petzite [Ag 3 AuTe 2], sylvanite [(Au,Ag)Te 2], and krennerite [(Au,Ag)Te 2].A gold–telluride association with antimony also occurs with the mineral montbrayite [(AuSb) 2 Te …

Processing technologies for gold-telluride ores

Gold telluride ores are important gold refractory ores due to the presence of sulfides and other gangue materials. The classification and main physical properties of gold telluride …

Treatment of Gold–Telluride Ores | Request PDF

To efficiently extract gold and silver tellurides, chemical treatments are required. Through these techniques, economically successful gold and silver extractions with cyanide have been achieved ...

Processing technologies for gold-telluride ores

The low gold extraction can be attributed to the fact that some of the gold in the ore occurs as gold telluride minerals having slow dissolution characteristic in cyanide solutions, which results ...

Treatment of gold-telluride ores

While extracting gold and silver from telluride-type gold deposits, it is beneficial to develop a comprehensive recovery technology for tellurium. In this paper, we report process mineralogy based on … Expand. 5 [PDF] Save. Producing metals from common rocks: The case of gold.

Electro-hydrometallurgical chloride process for selective …

Over 84% of gold could be recovered onto cathode from refractory telluride-gold ore. Chloride leaching (Au yield 93%) outperforms cyanidation (64%) for telluride ore. The …

How to Extract Gold from Pyrite?

The gold can then be chemically extracted and refined to pure 24k gold. Method 2 – Chemical Extraction. Another method for getting gold from pyrite involves brute force chemical extraction by dissolving the telluride minerals present in …

Nitric Acid Pretreatment Applied to a Refractory Gold …

This paper presents the results obtained by processing a gold and silver telluride mineral concentrate from a mine in Colombia. An acid wash, also known as acidification, was carried out, followed by oxidation with nitric acid as a pretreatment. Cyanidations of the pretreatment residues were carried out and the results were compared with results from …

Process mineralogy of gold: gold from Telluride …

Petrographic and microanalytical studies of gold in gold-silver telluride deposits show that it occurs as "visible gold" extracted by cyanidation, and as visible gold and "invisible gold"...

Electro-hydrometallurgical chloride process for selective gold …

Gold extraction reached 76% in<30 min but drastically slowed down after that resulting in total yield of 91% after 24 h. Such behavior is likely related to the degree of liberation of the gold minerals. ... Firstly, it is suitable for leaching refractory (telluride) gold ores directly after grinding with leaching efficiency exceeding 90% ...

Process Mineralogy of Gold: Gold from Telluride …

characteristics of refractory gold ores that occur in the hypogene environment of epithermal and mesothermal gold-silver telluride deposits. Metallurgical problems associated with gold-bearing tellurides and "invisible gold" (i.e., structurally bound gold and inclusions of native gold <1,000 Å in size) are addressed. The use of secondary ion

Process mineralogy of gold: gold from Telluride-Bearing ores …

Petrographic and microanalytical studies of gold in gold-silver telluride deposits show that it occurs as "visible gold" extracted by cyanidation, and as visible gold and "invisible gold ...

RU2541236C2

FIELD: metallurgy. SUBSTANCE: invention relates to the field of metallurgy of non-ferrous and noble metals, in particular, to the method to extract gold from telluride ores and concentrates. Initial raw materials are treated with a solution containing 1-10 g/l of sodium sulphite, 0.1-1 mg/l of dissolved oxygen, at pH=10-11. After treatment the cake is separated …

A WET AND CRUCIB1E-FIRE METHODS

THE ASSAY OF GOLD TELLURIDE ORES, WITH NOTES ON THE ERRORS OCCURRING IN THE OPERATIONS OF FIRE ASSAY AND PARTING. By W. F. HILLEBRAND and E. T. ALLEN. ... It was found impossible to extract the whole of the gold by wet treatment. The residues always yielded by fire assay small amounts of gold, usually under 0.1 mg. when properly washed, …

Nitric Acid Pretreatment Applied to a Refractory Gold …

Gold extraction from ore to solution throughout the pilot test reached up to ca. 90%, whereas in reference cyanidation test only 64% of gold was dissolved. ... Calaverite is a gold telluride ...

Selective Pre-leaching of Tellurium From Telluride-Type …

With a telluride-type gold ore flotation concentrate as the research object, the Na 2S+ ... provides new ideas for the extraction of rare element tellurium. Keywords: telluride-type gold ...

5 Methods of Gold-Silver Ore Extraction

Gold-silver ore is hard to extract, how can we separate gold and silver in gold-silver ore properly? Let's see details in this article! Email: hm404298359@gmail. ... Oxidation roasting can decompose telluride, selenide, and simple sulfides and complex sulfides of silver, and can expose silver that is wrapped in pyrite, chalcopyrite and ...

How is gold extracted from its ore?

The important ores of gold is Alluvial sand (or) Gravel. Mac Arthur Forrest Cyanide process: The extraction of gold from telluride (or) sulphide ore involves the following steps: (i) Crushing grinding and concentration: The gold ore is crushed and powdered well and then concentrated by forth floatation process.

Popular Beneficiation Methods For Extracting Gold From …

The content of gold in minerals is relatively low. In order to extract gold, it is usually necessary to crush and grind the ore, and then use mineral processing methods to pre-enrich or separate the gold from the ore.However, there are many types of gold ores, such as placer gold, rock gold, associated gold, polymetallic sulfide gold, telluride gold ore, etc. Gold ore has a high …

Recovery of Tellurium from Cyanide Leaching Gold Tailings …

As most gold ores in Xiaoqinling Shaanxi China exist in polymetallic telluride gold deposits, 31,32 currently, the extraction of precious metals from these ores involves cyanide leaching, resulting in the entrapment of tellurium in the leach tailings, and this part of Te will be one of the important sources of the efficient tellurium recovery ...

Gold-Bearing Tellurides

Gold occurs primarily in its native form and secondarily as a gold solid-solution of which tellurides are an example. Gold extraction from tellurides has attracted increasing atttention over the past several decades. Gold tellurides have been …

Refing Gold from Colorado Tellurides | Gold Refining & Metal Extraction …

The bit you will probably not like is that you need to spend money to possibly save money. Get your assays done for gold, silver, platinum and palladium, if you get nothing on the platinum group metals then you do not have to worry about these metals in future processing.

Rebellious Ores: Sulfides, Selenides and Tellurides

For information on methods to deal with and extract gold, silver and base metals from these refractory ores, I recommend two pages on this website. ... Sylvanite: A rich telluride of gold and silver. After calaverite, sylvanite is probably the next most important telluride ore mineral. It can assay as high as 30% gold.

hoelp on recovery of gold from calvarite

I use a technique of simmering the gold in HCl until the gold clumps and then filtering the gold from the liquor. This will, no matter how dirty the gold is, get you at worst 999 gold, usually 9999 gold. Always note that the base metals dissolved from the gold in the above method will dissolve some of the gold you are trying to clean.

OneMine | The Recovery of Gold from a Telluride Concentrate

The recovery of gold from a high grade telluride/sulphide flotation concentrate was investigated. Conventional cyanidation resulted in very slow rates of gold extraction. Historically, the refractory nature of tellurides has been overcome by fine grinding, the use of excess lime and long leach times. In some instances, pre­oxidation of the tellurides has also been necessary, to render the ...