the use of nitric acid in gold leaching

  • REFINING RECOVERY OF GOLD,SILVER AND PLATINUM GROUP METALS

    the 1 rule in refining gold is to concentrate the gold away from all other base metals prior to using acid or aqua regia systems. mechanical seperation will yeild the best results. to strain the gold flakes/pins from liquid use a painters filter first to get the large particals,use a minimg filter or coffee filters to collect small particals.

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  • Ammonia/nitric Acid Leaching of Copper Cobalt Oxidized Ore

    during the process. This is . Abstract The alkaline leaching behaviour of rich copper cobalt oxidised ore from Katanga has been investigated. Copper was leached in ammonia/nitric acid

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  • Leaching of copper(I) sulphide by sulphuric acid solution

    Nitric acid and nitrates are very strong oxidants. The former investigations were mainly aimed at leaching sulphides by using nitric acid as an oxidant, while leaching processes with use of nitrates have not been investigated.

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  • How to Extract Gold From Electronics Instructables

    Aug 13, 20140183;32;How to Extract Gold From Electronics. By ProjectPlace in Technology Electronics. 562,214. the only solution can dissolve gold is aqua regia (nitric acid, and hydrogen peroxide) 16 replies SuryaM20 4 months but any serious company will stay far away from mercury during gold leaching. Anyway, chlorine gas is indeed

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  • Old School Straight Nitric Acid Testing Stebgo Metals

    Straight Nitric Acid Testing In my previous blog post, I gave you a list of tools to have in your Simple Testing Tool Kit. One of the major tests you can conduct with your Simple Testing Tool Kit is the nitric acid test.

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  • Nitric acid leaching of silver sulphide precipitates

    Leaching of silver sulphide precipitates with nitric acid was performed at a variety of temperatures, pressures, acid concentrations and solids concentrations, with a maximum extraction of 96.1% achieved by leaching at 150176;C, 1100 kPa(g), and 9.6% solids with twice the stoichiometric amount of nitric acid.

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  • Gold refining by solvent extractionthe Minataur

    electrorefining circuit. The slime had been upgraded by leaching the silver in hot nitric acid. The material treated during the pilot plant campaign typically assayed 98.9%

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  • A Method for Leaching or Dissolving Gold from Ores or

    metallurgical leaching of gold ores by cyanidation or in the aqua regia process used for the recovery of secondary gold from electronic and precious scraps, the lixiviant and the reagent are both highly hazardous chemicals. These chemicals pose health and safety risks as well as a

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  • Gold extraction

    In the event that there are high levels of copper present, leaching of the precipitate using nitric or sulfuric acids may be required. Iron removal. Nitric acid or forced air oven oxidation can also be used to dissolve iron from the electrowinning cathodes before smelting.

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  • Gold Parting using Nitric Acid

    The ideal gold leaching formula is 71 (7 parts brine water to 1 part nitric acid), at a leaching temperature between, a low of 70 F and a maximum of 176 F. The higher the heat, the faster the reaction.

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  • RECOVERY AND REFINING WITH JUST NITRIC ACID SUBSTITUTE

    add the nitric substitute acid ,just enough to cover the materials. WITHOUT HEATING THE BATH IT WILL TAKE 3 TO 10 DAYS FOR THE ACID TO DESOLVE ALL THE NON GOLD METALS. IF YOU HEAT THE BATH IT CAN BE FINISHED IN HOURS INSTEAD OF DAYS.

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  • Nitric acid leaching of silver sulphide precipitates

    Leaching of silver sulphide precipitates with nitric acid was performed at a variety of temperatures, pressures, acid concentrations and solids concentrations, with a maximum extraction of 96.1%

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  • Gold Mining Process Development Denver Mineral

    Cyanide leaching is frequently used in conjunction with flotation. Cyanidation of flotation concentrates or flotation tailings is done depending upon the specific mineralogy and flowsheet economics. CYANIDATION. Cyanide leaching is the standard method used for recovering most of the gold throughout the world today.

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  • The Extraction of Gold from E waste by Hydrometallurgy

    The leaching waste from the first step (copper and silver) was operated with nitric acid to dissolve gold at a high temperature between 40 and 110 degrees Celsius with various ratios of choleric acid to nitric acid being 1 10 in minimum time of 60 minutes.

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  • How to Refine Gold With Nitric Acid Sciencing

    To refine gold with nitric acid, you will first need to blend the nitric acid with hydrochloric acid to produce aqua regia. Then, you will need to dissolve, filter and retrieve the gold

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  • Acid test (gold)

    An acid test is any qualitative chemical or metallurgical assay which uses acid; most commonly, and historically, the use of a strong acid to distinguish gold from base metals.Figuratively, acid test is any definitive test for some attribute, e.g. of a person's character, or of the performance of product.

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  • SSN Leach Sodium Chloride Platinum

    SSN leach solution contains in this instance about 1.44 molar nitric acid, therefore, you would expect to see a pH 0 when it is measured. This is not the case. Actually the pH reads from pH 0.8 to pH 1.5. So far there is The behavior of nitric acid (70%) in SSN is nothing spectacular in

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  • How to Refine Gold With Nitric Acid Sciencing

    With the gold inside the beaker, carefully add 30 mL of nitric acid for every ounce of your measured weight and then 120 mL of hydrochloric acid for every ounce of weight as well. Be careful not to inhale any of the fumes released by the acids.

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  • What Is The Use Of Acid In Leach? YouTube

    Aug 18, 20170183;32;Acid leaching is commonly performed by agitating an ore leach mixture for 4 to as long 48 hours at ambient temperature. Used in acid leaching of saimm. Acid leaching use for uranium ores. M hydrochloric acid from the soil was acid, edta, and subcritical water are most used reagents oct 24, 2014 he says it can be to more easily extract gold poly metallic ores, such as copper by staging extractions.

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  • Gold Refining Chemistry Science Forums

    If it is uric acid in solution that would make sense heap leaching gold wise as uric acid acts to corrode (oxidise) iron in which much native lode gold is found in association. In addition uric acid or urea the chrystal when heated during electrolysis produces cyanide (the primary agent for leaching processes for precious metals)which further

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  • Will nitric acid dissolve pyrite Hydrometallurgy

    I recommend doing more research on the roasting of sulfide gold ores. Whatever you do, don't mix nitric acid with the HCl. Depending on relative concentrations of the two acids, that can make aqua regia, which will dissolve your gold as well.

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  • Going for gold Alternative processing methods

    The breakthrough was the use of sulfite in the solution used to recover remove the gold thiosulfate from the resin, which has now opened up a new area of recovery potential applications of

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  • A Method for Leaching or Dissolving Gold From Ores or

    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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  • How To Use Mercury To Recover Gold

    Nitric acid can be absorbed through the skin, causing nitric acid poisoning. WEAR RUBBER GLOVES Always use mercury, sulfuric acid and nitric acid in a well ventilated area.

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  • Diagnostic Leaching for Refractory Gold Ores SRK

    Stage 4 Leach residue from Stage 3 is reacted in a hot nitric acid leach to dissolve more resistant sulfide minerals, such as pyrite and arsenopyrite, and liberate any gold that might be locked in these minerals. The residue is then subjected to cyanidation and a sample of the residue is assayed for gold.

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  • HYDROMETALLURGICAL PROCESS FOR

    Sheng and Etsell [9] investigated leaching of gold from computer chips. The first stage was leaching of base metals with nitric acid and the second, leaching of gold with

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  • How to Refine Gold by the Acid Method Shor

    How to Refine Gold by the Aqua Regia Acid Method. Instructions. The two acids which are used in this process are concentrated hydrochloric and nitric acids. Nitric acid is very corrosive. When combined with hydrochloric acid, the fumes become much more corrosive. Nitric acid, or nitric acid substitute such as MX3 Concentrate; Baking

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  • Diagnostic Leaching for Refractory Gold Ores SRK

    The sulfuric acid leach residue is then subjected to cyanidation and a sample of the residue is assayed for gold. Stage 4 Leach residue from Stage 3 is reacted in a hot nitric acid leach to dissolve more resistant sulfide minerals, such as pyrite and arsenopyrite, and liberate any

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  • Dissolving Gold with Nitric and Sulfuric Acids chemistry

    Normally, in these situations, refiners have to resort to inquartation, where the gold silver alloy is first dissolved in a greater quantity of molten silver to decrease the gold content, then the resulting new alloy is dissolved with plain nitric acid.

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  • Chemical Leaching of Black Sands Gold Claims Sale

    May 05, 20120183;32;Chemical Leaching of Black Sands; User Info Username Password Welcome, Guest. Please login or register. Did you the gold. The dilute nitric acid should get all or most of the iron and some other metals but if there is also silver, it will get that too as silver nitrate (AgNO3). But no matter as it can be cemented out of the

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  • Use of Nitric to get rid of base metals Gold Refining

    Jul 05, 20130183;32;I see no reason to use nitric at this point ($$$), when you can leach most base metals with another acid like sulfuric acid, or hydrochloric acid, or even weaker acids like citrus acid or even vinegar depending on the base metal and ore.

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  • The Extraction of Gold from E waste by Hydrometallurgy

    The leaching waste from the first step (copper and silver) was operated with nitric acid to dissolve gold at a high temperature between 40 and 110 degrees Celsius with various ratios of choleric acid to nitric acid being 1 10 in minimum time of 60 minutes.

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  • quot;Gold Recovery for Dummies?quot; Finishing

    When using nitric acid to remove base metals in gold recovery it is very easy to misplace your gold. On electronics that use gold for shielding (such as RF shielding) the gold can be very thin and instead of coming off in foils will separate into finely divided particles and will get lost in trash.

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  • The Chemistry of the Extraction of Gold SAIMM

    The Chemistry of the Extraction of Gold M.J. Nicol, C.A. Fleming and R.L. Paul For example, gold does not dissolve in either nitric acid (an oxidizing agent) or hydrochloric acid (a complexing ligand), but dissolves quite easily in a leaching of gold and uranium, which

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  • Aqua regia

    Aqua regia dissolves gold, though neither constituent acid will do so alone, because, in combination, each acid performs a different task. Nitric acid is a powerful oxidizer, which will actually dissolve a virtually undetectable amount of gold, forming gold ions (Au 3+ ).

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