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Silver Sulfide Ores

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DETERMINATION OF SILVER, GOLD AND COBALT IN

2017-9-4silver sulfide ores, matte and their mixtures. INTRODUCTION . Sulfide ores are an important source of nonferrous metals, for example, copper, nickel and cobalt. In most of them, microquantity of precious metals including gold and silver are found. In the practice of the analytical chemistry laboratory of Institute of Metallurgy of UrB

Influences of silver sulfide on the bioleaching of ...

Abstract. The effects of silver sulfide Ag 2 S on the bioleaching of chalcopyrite and pyrite were investigated in this paper. It has been shown that Ag 2 S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition of Ag 2 S selectively increased the copper dissolution from the chalcopyrite-containing ores in shake flasks with a recovery of 85 ...

Establishing thE ProcEss MinEralogy of gold orEs

2015-12-16Silver-rich ores and copper sulfide ores Silver-rich ores and copper sulfide ores are often free-milling, but when the silver grade is high 10 gt andor the gold is present as electrum, the processing may need to be modified.

Froth Flotation Method - JXSC Machine

2020-5-21The froth flotation method is widely used to treat various veins of gold and silver ores for the following reasons 1 In most cases, the froth flotation process can enrich gold and silver in sulfide concentrate to the greatest extent and discard a large number of tailings, thus reducing the smelting cost.

Pressure Oxidation of a Refractory Sulfide

2020-5-18Significant advances have taken place in the treatment of refractory gold ores and concentrates during the past decade. In sulfide ores, pyrite is the most common host mineral for gold. Studies by Gasparrini 1983 showed that gold occurs in pyrite as native gold or electrum in all sizes and forms. Arsenopyrite is probably the second most common host for gold and forms similar associations ...

Recovery of Silver, Gold, and Lead From a Complex

tion is usually low with complex sulfide gold-silver ores. A procedure to extract silver from sulfide ores with FeC13 was patented by Hey in 1922 6. Considera ble work was completed by-Wong 7 to re cover lead from a galena concentrate with a combined FeC13-NaCl leach solution. Because both lead and silver

Smelting and Roasting Ores to recover gold, silver and ...

2014-6-26Smelting and Roasting Gold and Silver sulfide Ores to recover values Nevada Outback Gems. ... The addition of scrap iron to smelt mixes is a useful technique to small-scale operators experimenting with smelting techniques on gold-silver ores. It could also be used with small lots of sulfide

GOLD AND SILVER - Records Collections

2020-5-20After milling, sulfide ores may be subjected to oxidation by chlorination, bio-oxidation, roasting, or autoclaving. Chlorination is not commonly used to oxidize sulfide ores because of high equipment maintenance costs caused by the corrosive nature of the oxidizing agent. Bio-oxidation of sulfide ores employs bacteria to oxidize the sulfur-bearing

Handbook of Flotation Reagents | ScienceDirect

Silver recovery in a large number of ores, specifically from South America, is emphasized, and some of these circuits were in fact designed to provide the highest possible silver recovery. The reagent scheme used in the treatment of leadzinc ores varies considerably and depends on

DETERMINATION OF SILVER, GOLD AND COBALT IN

Sulfide ores are an important source of nonferrous metals, for example, copper, nickel and cobalt. In most of them, microquantity of precious metals including gold and silver are

Influences of silver sulfide on the bioleaching of chalcopyrite ...

Abstract The effects of silver sulfide Ag 2 S on the bioleaching of chalcopyrite and pyritewere investigated in this paper.It has been shown that Ag 2 S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition ofAg2S ...

The method of pre-roasting of sulfide ores and their ...

The method of pre-roasting of sulfide ores and their processing products containing gold and silver, assay analysis involves the oxidation of ores oxygen in fireclay boats in a muffle furnace at two modes of firing, and the firing begins at a temperature of 250-300 o C and hold it for 10-15 minutes and finish at a temperature of 450-500 o With ...

silver Ag - David Darling

2019-8-29Silver occurs both uncombined, sa native silver see Figure 1, and in ores such as galena and argentite. Argentite, also called silver glance, is a soft, dark gray sulfide ore of silver Ag 2 S, related to chalcocite. It occurs in veins, often together with native silver, in parts of Norway, Germany, the Czech Republic, South America, Mexico ...

Catalytic Effect of the Combined Use of Activated Carbon

The catalytic effect of combined use of activated carbon and silver ion on improving the efficiency of the bioleaching of Yongping Copper Mines low-grade primary copper sulfide ores was investigated through shaking flask experiment.The results show that the addition ...

Copper Ore Types Sulfides vs. Oxides | An Investors ...

Copper sulfide ores are typically the most profitable types of copper ores to mine. That is because they have high copper content, and the copper in them can more easily be separated from unwanted ...

Influences of silver sulfide on the bioleaching of chalcopyrite ...

2013-6-21Abstract The effects of silver sulfide Ag 2 S on the bioleaching of chalcopyrite and pyritewere investigated in this paper. It has been shown that Ag 2 S enhanced the yields of bioleaching of chalcopyrite but inhibited the bio-oxidation of pyrite. The addition ofAg2S ...

Influences of silver sulfide on the bioleaching of ...

Influences of silver sulfide on the bioleaching of chalcopyrite, pyrite and chalcopyrite-containing ore Article in Journal of Central South University of Technology 9111-15 January 2002 with ...

EXTRACTING METALS FROM SULFIDE ORES

Mixed oxide and sulfide copper ores are leached following the same process stages as in Figure 4. Also, some sulfidic ores that are too lean to treat by flotation are also leached in heaps or dumps. The recovery of metals from sulfides in this way utilizes bacteria either naturally present or inoculated into the material.

Sulfide Gold Ore - Fp Search

A new massive sulfide pod was discovered in a bedrock canyon, these are some of the high grade gold, silver and copper ore samples we pulled out from the High Grade Gold Silver Sulfide Veins In An Oxidized Outcrop Multiple solid mineral veins with gold, silver and copper exposed in a small quarry.

Copper sulfide ore Mineral information, data and

Quick NavTop About Copper sulfide ore Classification Mineralogy Age distribution Internet Links Mineral andor Locality Mindat.org is an outreach project of the Hudson Institute of Mineralogy , a 501c3 not-for-profit organization.

Copper Mining and Extraction Sulfide Ores

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. FeO s SiO2s FeO.SiO2 slag This is very similar to the removal of impurities in the blast furnace. The liquid left is a ...

Recovery of Gold in Pyritic Sulfide Ores - Mine

2013-1-13Recovery of gold in sulfide ores has fallen into several categories. First is froth flotation, and second is cyanidation of the ores. Using cyanide to recover gold from sulfide ores generally results in 30 to 35 recovery, and the best I have heard of is around 50 recovery. The fine coating of a iron compound definitely appears to be a key ...

Silver metal | Article about Silver metal by The Free ...

The sulfide can be obtained by the action of hydrogen sulfide on soluble silver salts or on aqueous suspensions of silver salts. The solubility of Ag 2 S in water is 2.48 10 -5 moleliter 25C. Examples of analogous compounds are the selenide Ag 2 Se and telluride Ag 2 Te.