Leaching Gold By Chlorite-GOLD MINING

MINING

How to Leach Gold Ore With Chlorination Sciencing

The gold is in liquid form in the HCL. Add sodium metabisulphate to force the gold to become metallic gold again. The sodium metabisulphate lowers the pH of the solution, turning the gold liquid into gold powder. Filter the water again using a fine gold filter and dump the water into another bucket and not onto the ground or down the drain.

Leaching of an oxide gold ore with chloride/hypochlorite

To avoid the complexity of gold species adsorption and precipitation, some researchers have opted to measure gold leaching kinetics in idealized chloride/hypochlorite system in terms of weight loss of pure gold disk and strips, rather than measuring dissolved gold concentration in solution Jeffrey et al., 2001a, Jeffrey et al., 2001b

Leaching of an oxide gold ore with chloride/hypochlorite

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca OCl 2 vs. NaOCl, OCl concentration, and HCl concentration on

Hypochlorite Leaching of Gold Ore

The reactions between gold and hypochlorite leach solutions containing hydrochloric acid and sodium chloride are demonstrated below: 4Au 16NaOCl 10H2O 4HAuCl4

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF REFRACTORY

2000 . Leaching of gold with hypochlorous acid follows reaction 1 Jeffrey et al., 2001 : 2Au 3HOCl 3H 5Cl 2 AuCl 4 3H 2 O. 1 Controlling solution pH and Eh is important for stabilizing the gold complex. Failing to do this would cause the gold to reprecipitate, after it is dissolved from the ores

PDF Leaching of an oxide gold ore with chloride

Calcium hypochlorite produced a sluggish gold leaching kinetics, requiring twice more time 46 h to achieve the maximum gold recovery of 58 compared to sodium hypochlorite. To have a reasonable gold leaching kinetics, it was found that OCl in solution must be equal or higher than 10 g/L.

PDF Chloridehypochlorite oxidation and leaching of

chlorite, initial pH 11 and In this paper, gold leaching of a refractory sulfide concentrate by chloridehypochlorite solution was investigated and effects of stirring speed, temperature

Alternative Lixiviants to Cyanide for Leaching Gold Ores

Chlorine dioxide ClO 2 generated from sodium chlorite and hydrochloric acid can potentially be used as an oxidant in hydrochloric acid systems for leaching gold appli ions have only been applied to oxidative dissolution of enargite Moldoveanu et al., 2014 .

Leaching process Action Gold Development Ltd.

Leaching processes for the recovery of metals are known and find particular appli ion in the recovery of gold. The chloride and cyanide leaching processes for gold recovery involve an initial oxidation of the gold to a higher oxidation state and then the formation of a complex anion with chloride or cyanide ions which take the gold into solution.

Influence of agitation leaching conditions to the behavior of

Deposition of gold ions in the process of agitation with a chloridehypochlorite solution with 8.15 g/l active chlorine concentration in the model material was studied. Fresh chloritehypochlorite solution was used in the study. The effect of the initial pH of the medium on the dynamics of gold deposition is considered. It was found that up to 56 of gold precipitates in alkaline medium

Leaching of Primary Copper Sulfide Ore in ChlorideFerrous Media

through to other leaching processes, such as the bacterial leaching of gold sulde concentrates, where ferric iron promotes the dissolution of pyrite and arsenopyrite 22 . In addition, numerous studies showed that leaching of chalcopyrite in chloride media results in higher copper extractions than in sulfate media 16,23,24 .

RompasRajapalot GoldCobalt Projec Mawson Gold Ltd.

Goldcobalt mineralization is a potassiciron type characterized by muscovitebiotitechlorite quartz pyrrhotiterich schist with subordinate albite, ironmagnesium amphiboles and tourmaline which is best developed to date at the Raja prospect.

InSitu Leach Mining The Next Quantum Leap

Clay, chlorite and felspar minerals present may be markedly changed by pH or redox potential variations, as may be the stability and reactivity of organic carbon, graphite and heavy metals present, especially iron. At Honeymoon in South Australia, leaching with sulphuric acid and

GOLD LECHING FROM A SAUDI ORE BY THE NONPOLLUTING THIOSULFATE

Gold leaching from a Saudi ore by the nonpolluting thiosulfate process 63 Fig. 1. Gold dissolution sketch by the ammoniacal thiosulfate process The reaction chemistry using cupric amine as an oxidant can be explained by the

Deportment of Gold and Silver in the Pinos Altos Composite

invisible gold in sulphide and non sulphide minerals. Gravity separation using a Knelson concentrator 3 and cyanide leaching using the bottle roll test were implemented to produce the leaching residues studied in this paper. The gold and silver overall recoveries vary, respectively, from 95 to 97 wt and 25 to 65 wt. Methodology

Dissolving Gold and Precipitating Gold Pyrometallurgy

To participate in the 911Metallurgist Forums, be sure to JOIN and LOGIN Use Add New Topic to ask a New Question/Discussion about Pyrometallurgy and Electrometallurgy. OR Select a Topic that Interests you. Use Add Reply to Reply/Participate in a Topic/Discussion most frequent . Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment to

Gold III chloride Wikipedia

Gold III chloride, traditionally called auric chloride, is a chemical compound of gold and chlorine. With the molecular formula Au 2 Cl 6, the name gold trichloride is a simplifi ion, referring to the empirical formula, AuCl 3. The Roman numerals in the name indi e that the gold has an oxidation state of 3

Summary of Gold Extraction Process

In the leaching process, the grinded ore is first conveyed to a series of leaching tanks, and the slurry is stirred by mechanical force or by injecting air to increase the contact between cyanide and gold and improve the leaching efficiency. The cyanide then dissolves the gold from the ore to form a stable metalcyanide complex.

0702 Relief Canyon Landore

6. Heap leaching with fine crushing and agglomeration can achieve acceptable extractions of gold 84 at test conditions . 7. In fineground material, gold occurs predominantly as coarse liberated particles and as attachments and inclusions in chlorite and cobaltite. Minor quantities of gold are associated with tellurides. 8.

GOLD LECHING FROM A SAUDI ORE BY THE NONPOLLUTING THIOSULFATE

Gold leaching from a Saudi ore by the nonpolluting thiosulfate process 63 Fig. 1. Gold dissolution sketch by the ammoniacal thiosulfate process The reaction chemistry using cupric amine as an oxidant can be explained by the

DETAILED METALLURGICAL ASSESSMENT BAM GOLD DEPOSIT Company

6. Heap leaching with fine crushing and agglomeration can achieve acceptable extractions of gold 84 at test conditions . 7. In fineground material, gold occurs predominantly as coarse liberated particles and as attachments and inclusions in chlorite and cobaltite. Minor quantities of gold are associated with tellurides. 8.

Epithermal Gold for Explorationists Journal

The Arc Low Sulphidation gold deposits display strong field associations with intrusive rocks and are agorised below on the basis of varying ore pyrite, sphalerite, galena, chalcopyrite, arsenopyrite , gangue quartz, carbonate, clay and wall rock clay, chlorite mineralogies, which essentially relate to formation at increasingly shallow

Volume 4, Issue 12, June 2015 Preliminary Cyanidation of Gold

optimum leaching time which gives the gold recovery of 93.5. Elsevier, Chapter 19. Fig 4. The recovery of gold in different leaching time 10 . IV. CONCLUSION Based on the results obtained from gold distribution in different particle size, mean grade was measured about 1.9 g/t.

Dissolving Gold and Precipitating Gold Pyrometallurgy

To participate in the 911Metallurgist Forums, be sure to JOIN and LOGIN Use Add New Topic to ask a New Question/Discussion about Pyrometallurgy and Electrometallurgy. OR Select a Topic that Interests you. Use Add Reply to Reply/Participate in a Topic/Discussion most frequent . Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment to

Blagodatnoye Gold Mine, Krasnoyarsk, Russia

The gold mineralisation occurs in silica, chlorite, and sericite alteration zones, with the main gold forms in the ores being free, connected with barren minerals, and in aggregates. Majority of the gold exists as disseminated native gold, while the rest is associated with the sulphide minerals.

HEAP LEACHING FOR SUSTAINABLE DEVELOPMENT IN THE SOUTH

efficiently recovered from cyanide leach solutions using adsorption to carbon and subsequent elution Synders et al., 2013 Mpinga et al, 2013 . While cementation is adequate for gold recovery it does not effectively recover PGMs Mpinga et a., 2014 .

Reducing cyanide consumption in gold recovery from finely

Precious metals such as gold can be extracted from a refractory ore using a conventional cyanide leaching step and with reduced cyanide consumption by pretreating the ore prior to cyanide leaching. The refractory ore is pretreated by fine grinding and an initial leaching step which uses inexpensive limestone and lime to maintain the initial

Assets Operations El Castillo Complex, Argonaut Gold Inc.

Argonaut Gold has a strong operating history of delivering profitable production from low grade, heap leach mines. The grade at the El Castillo Complex often runs 0.3 to 0.4 grams per tonne gold. Yet, due to a relatively low strip ratio and good leach kinetics, we are able to operate efficiently and profitably.

Systematics of chlorite alteration at the Phelps Dodge

Alteration at constant Al was initiated by hydration, addition of Fe Mg, silicifi ion, and leaching of Ca Na which produced Alsaturated chlorites with a wide range of Fe/Fe Mg ratios within the assemblage quartzchloritealbiteepidote or sericite.

OREAS 254b Certified Reference Material CRM OREAS

The Wilber Lode is a shear hosted, narrow vein, quartz lodestyle gold deposit situated within the MeekatharraWydgee greenstone belt in the Archaean Yilgarn Craton of Western Australia. The common primary mineral assemblage as stated by Mason and Harris 2011, 2012, cited in Hingston et al, 2014 is quartz, calcite, chlorite, fuchsite, pyrite

Copper Oxide Ore Leaching Ability and Cementation Behavior

Generally alteration occurs when rocks react to hydrothermal and magmatic fluids and this reaction leads to chemical and mineralogic changes. Chlorite alteration has occurred in large scale which is a specific form of Propylitic alteration. Al, Fe and Mg rich fluids cased chlorite alteration in basic rocks 18 .

Florida Canyon Gold Mine Western Mining History

The first ore was delivered to the leach pad in September and the first gold was poured in November 1986. Since the haul distance is shorter to the leach pad than the waste dump, leaching of lowgrade, runofmine ore commenced in 1989. 760,000 tons of runofmine material containing between 0.008 and 0.014 opt Au were loaded on a portion of

Previous: Limestone Powdering Machine In Ethiopia
Next: Underground Ore Dressing Equipmnt For Sale

Related Articles

Leaching Gold By Chlorite