can nitric acid extract gold from sulfide ore

Small Scale Treatment of PM Sulfide Ores Gold Refining

Small Scale Treatment of PM Sulfide Ores Gold Refining

Feb 15, 2020 · The point is that sulfide ores can be highly variable. Part the gold and silver with nitric acid The silver and any small amounts of copper present will be soluble in plain nitric, and I will cement out the silver with metallic copper, then recover all the copper electrolyticly. I would think that even smaller particles would be easier

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Small Scale Treatment of PM Sulfide Ores Gold Refining

Small Scale Treatment of PM Sulfide Ores Gold Refining

Feb 15, 2020 · The point is that sulfide ores can be highly variable. Part the gold and silver with nitric acid The silver and any small amounts of copper present will be soluble in plain nitric, and I will cement out the silver with metallic copper, then recover all the copper electrolyticly. I would think that even smaller particles would be easier

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ON THE ISSUE OF GOLD EXTRACTION FORM PERSISTENT SULFIDE ORES

ON THE ISSUE OF GOLD EXTRACTION FORM PERSISTENT SULFIDE ORES

The technology of preparation of such ores for cyanidation based on the oxidation with nitric acid results in the escape of large amount of sulfur which significantly reduces the gold extraction into the solution in the course of cyanidation. The technology of pressure oxidation of sulfide ores is related to high capital and operational costs.

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What is Sulfide Mining? Mining Action Group

What is Sulfide Mining? Mining Action Group

Metallic sulfide mining (aka hard rock mining) is the practice of extracting metals such as nickel, gold and copper from a sulfiderich ore body. Sulfides are a geologic byproduct of mining in this area, and by exposing sulfides to the air and water in our atmosphere, sulfuric acid can be created — threatening to poison the nearby water

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Can Nitric Acid Extract Gold From Sulfide Ore

Can Nitric Acid Extract Gold From Sulfide Ore

May 18, 2016 · Here is How to extract silver from ore at home. Roasting Silver Ore begins with crushing the ore, then roasting off the sulphides, tabling it and finally, smelting inside the KK6 gas furnace.

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EXTRACTING METALS FROM SULFIDE ORES

EXTRACTING METALS FROM SULFIDE ORES

Biochemical oxidation of the sulfide minerals releases the gold and allows it to be leached by the chemicals used in conventional gold leaching. Biochemical processes are being developed for the treatment of copper, nickel and cobalt sulfide ores and are expected to become the major method for recovery of these metals in the future.

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Method for gold extraction from thrust sulphide ore

Method for gold extraction from thrust sulphide ore

SUBSTANCE: method for gold extraction from thrust sulphide ore includes biooxidation with receiving acid pulp and its preparation to sorption leaching of gold by means of neutralisation and by oxygen aeration. At that neutralisation is implemented simultaneously to oxygen aeration at keeping of its content in pulp not less than 10 mg/dm 3.

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Heap leaching Wikipedia

Heap leaching Wikipedia

This method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead of cyanide solution to dissolve the target minerals from crushed ore. The amount of sulfuric acid required is much higher than for copper ores, as high as 1,000 kg of acid per tonne of ore, but 500 kg is more common.

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Dissolving Ore? Gold Prospectors Association of America

Dissolving Ore? Gold Prospectors Association of America

This is an alternate method to using AquaRegia. The problem with using acids like this with "gold ore" is that other metals are almost always present in the ore with the gold, so once you dissolve the gold into solution, other metals are also spoiling the mix, which makes removing the gold even harder to do. Sulfuric Acid will "not" dissolve gold.

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Copper Mining and Extraction: Oxide Ores

Copper Mining and Extraction: Oxide Ores

Most of the copper ores mined today are oxide or sulfide ores. Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction: Sulfide Ores (11–14), but is introduced here because an important byproduct of this process is used for the extraction of oxide ores. Pyroprocessing Sulfide Ores Provides Acid for Leaching

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Dissolving Ore? Gold Prospectors Association of America

Dissolving Ore? Gold Prospectors Association of America

This is an alternate method to using AquaRegia. The problem with using acids like this with "gold ore" is that other metals are almost always present in the ore with the gold, so once you dissolve the gold into solution, other metals are also spoiling the mix, which makes removing the gold even harder to do. Sulfuric Acid will "not" dissolve gold.

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how to extract gold from ore with lead content

how to extract gold from ore with lead content

When gold dissolution is complete, the goldbearing solution is separated from the solids. With ores of higher gold content (greater than 20 grams of gold per tonne of ore), cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent in large tanks equipped with agitators.

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Goldcopper ores ScienceDirect

Goldcopper ores ScienceDirect

The presence of sulfides in the ore can also have a significant impact on cyanidation of gold/copper ores. Fig. 4 shows the Eh–pH diagram for the system. Download : Download fullsize image Fig. 4. EhpH diagram for the Cu–CN–S–H 2 O system at 25°C (after OsseoAsare et al., 1984).

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Minerals Free FullText Improvement of Gold Leaching

Minerals Free FullText Improvement of Gold Leaching

A total gold extraction of 70.2% could only be reached via direct cyanidation from a refractory As, S and Cbearing gold concentrate calcine, and the gold extraction varied noticeably with different size fractions. The reasons for unsatisfactory gold extraction from the calcine were studied through analyses of chemical composition, chemical phase and SEMEDS of different sizes of particles

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EXTRACTING METALS FROM SULFIDE ORES InvestorsHub

EXTRACTING METALS FROM SULFIDE ORES InvestorsHub

Most sulfides are electrically conducting, generally semiconducting, and this allows electrochemical reactions to occur at the solid/solution interface In fact, electrochemical mechanisms play a key role in each of the processes that are involved in obtaining the component metals from their sulfide ores, namely, prospecting for ores (weathering

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Gold extraction Wikipedia

Gold extraction Wikipedia

Although gold does not dissolve in pure nitric acid solutions, some dissolution of gold in sulfide systems can be attributed to the formation of thiosulfate during the oxidation process (Marsden

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How is sulfur extracted from its ores? Quora

How is sulfur extracted from its ores? Quora

Aug 25, 2018 · There are no (or very little) sulfur ores, at least today. The main source is the purifiion process of natural gas and oil : the sulfur is converted into H2S and part of it is burned into SO2 which then react with H2S : SO2 + 2 H2S → 3 S + 2 H2

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Gold Ore an overview ScienceDirect Topics

Gold Ore an overview ScienceDirect Topics

Gold ores are classified "freemilling" and "refractory" based on their response to cyanide dissolution. Bioprocessing can be used to treat refractory goldbearing sulfide ores as well as carbonaceous gold ores. It is essential to characterize different types of gold ores to understand the extent and nature of goldentrapment in different associated mineral phases before an appropriate

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Processing gold sulphide ore Gold Refining Forum.com

Processing gold sulphide ore Gold Refining Forum.com

Apr 14, 2014 · If your acid turned a nice yellow you can extract the gold out of it with small amounts of zinc just add small amounts until your acid turns clear this part is fun as it seems like magic watching it haha. Do not overdue the zinc though just a little bit at a time until it slowly removes the yellow out of acid.

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How to Extract Precious Metals From Sulfides Sciencing

How to Extract Precious Metals From Sulfides Sciencing

Extract sulfide ore deposits from the ground and place in to the crusher to mince ore from 5 to 50 micrometers. Crushing begins the separation process by preparing the ore to be floated in water. First, the ore is crushed using a gyratory crusher to reduce the ore to 6inch diameter pieces.

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extracting pper from sulfide ores MC Machinery

extracting pper from sulfide ores MC Machinery

The Extraction of Copper Chemistry LibreTexts. Extracting of Copper from Other Ores. Copper can be extracted from nonsulfide ores by a different process involving three separate stages: Reaction of the ore (over quite a long time and on a huge scale) with a dilute acid such as dilute sulfuric acid to produce a very dilute copper(II) sulfate solution.

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Pretreatment Process on Refractory Gold Ores with As

Pretreatment Process on Refractory Gold Ores with As

Electrochemical oxidation 28) uses electrodereaction to oxidize gold ore bearing arsenide and sulfide in a certain media. The dielectric system contains vitriol, nitric acid and hydrochloric acid, etc. The result of reaction is similar to pressure oxidation. The process can change microstructure of refractory gold ore to improve porosity of ore.

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Sulfide Ore Treatment Gold Silver Copper Cobalt

Sulfide Ore Treatment Gold Silver Copper Cobalt

A procedure was developed for recovering gold, silver, cobalt, copper, and zinc from a massive sulfide ore by a hydrometallurgical process. The procedure consists of (1) oxygen pressure leaching (2) iron, arsenic, and copper removal from the leach solution by precipitation (3) selective extraction of cobalt and zinc from solution (4) electrodeposition of the cobalt and zinc from the strip

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Rebellious Ores: Sulfides, Selenides and Tellurides

Rebellious Ores: Sulfides, Selenides and Tellurides

Rebellious Ores: Sulfides, Selenides and Tellurides. , with the rebellious sulfide ores they were recovering less than 50%. 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.

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Rebellious Ores: Sulfides, Selenides and Tellurides

Rebellious Ores: Sulfides, Selenides and Tellurides

Rebellious Ores: Sulfides, Selenides and Tellurides. , with the rebellious sulfide ores they were recovering less than 50%. 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.

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How to Extract Gold From Scrap Sciencing

How to Extract Gold From Scrap Sciencing

Observe the muddy separation that collects at the bottom of the acid container. This substance is pure gold. Extract the gold from the container by pouring off the acid using a filter, then rinsing and refiltering the substance three times with distilled water. The result will be nearly 100 percent gold.

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how to extract gold from ore with lead content

how to extract gold from ore with lead content

When gold dissolution is complete, the goldbearing solution is separated from the solids. With ores of higher gold content (greater than 20 grams of gold per tonne of ore), cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent in large tanks equipped with agitators.

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Can Nitric Acid Extract Gold From Sulfide Ore

Can Nitric Acid Extract Gold From Sulfide Ore

Can Nitric Acid Extract Gold From Sulfide Ore. Oct 19 2012 · If your nitric acid did digest the silver from the ore and the assay you performed on the residues showed no other precious metals then you should follow Butchers advice and leave it acidic and cement the dissolved silver with copper. Get Price.

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(PDF) Gold recovery of refractory sulfide concentrates

(PDF) Gold recovery of refractory sulfide concentrates

The problem of refractory sulfide gold ore that has a gold recovery less than 50% when direct . capable of extracting gold from the ore. by nitric acid'', in World Gold Conference .

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Copper Sulfide Ore Metalcess

Copper Sulfide Ore Metalcess

Copper Sulfide Ore About 80% of the world''s copperfromore originates in CuFeS ores, such as chalcopyrite (CuFeS2) and chalcocite (Cu2S). The concentration of these minerals in an ore body is low.

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Refractory Gold Ore Treatment Methods

Refractory Gold Ore Treatment Methods

Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and

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Smelting high grade leadsilver ore [Archive

Smelting high grade leadsilver ore [Archive

Let''s see, you could powder the ore to start, then roast it (heat it to redness on a piece of sheetmetal until no more sulfur burns off.. beware of the fumes), then extract with nitric acid giving a solution of lead and silver nitrates, then precipitate the silver with some muriatic acid (HCl). Add it

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How to Extract Silver from Ore at Home by  YouTube

How to Extract Silver from Ore at Home by YouTube

May 18, 2016 · Here is How to extract silver from ore at home. Roasting Silver Ore begins with crushing the ore, then roasting off the sulphides, tabling it and finally, smelting inside the KK6

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Extracting gold from rock OpenLearn Open University

Extracting gold from rock OpenLearn Open University

The mercury vapour can be condensed on the walls of a cold test tube as metallic beads, making them quite easy to collect. The amalgamation So how do you use mercury to extract the gold from goldbearing rock? When you mix the finely powdered goldbearing rock with some mercury, the gold within the rock dissolves, to form what''s called a gold

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Sulfides Gold Recovery Methods ICMJ''s Mining Journal

Sulfides Gold Recovery Methods ICMJ''s Mining Journal

Sep 04, 2015 · Most sulfide ores are processed by flotation. Depending on the ore, gravity methods can produce a fair concentrate not as good as flotation. The problem with sulfides is extraction of values Most extraction of sulfides is by smelting. There are no smelters in the US accepting custom ores that I know of (Thanks EPA, now we are dependent on

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A Method for Leaching or Dissolving Gold From Ores or

A Method for Leaching or Dissolving Gold From Ores or

Aug 18, 2005 · It is known that gold can be efficiently leached from gold bearing ores using a mixture of hydrochloric acid, ferric chloride, and manganese dioxide.12 The chemical reaction involved during the

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Gold Mining Process Development – Denver Mineral Engineers

Gold Mining Process Development – Denver Mineral Engineers

Chemical oxidation using nitric acid at ambient pressure and temperature has also been used on a limited basis. Other ore types considered refractory include: Carbonaceous ores that allow cyanide to dissolve gold but quickly adsorb gold back onto the active carbon in the ore

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