The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possible by first oxidizing auriferous sulfide ...

Residual hypochlorite ion concentrations in the test slurries were ... in the subsequent cyanide leaching step and renders the cyanide ineffective for gold leaching.

I am attempting to design a chlorine leach (sodium hypochlorite) ... Leaching of gold in chlorine media was industrially practiced before cyanide was used for this ...

HYPOCHLORITE LEACHING OF GOLD ORE 69 Overall reaction of equations (I), (2) and (3) can be summarized as follows: It is obvious that both hydrochloric acid

Read "Chloride–hypochlorite leaching of gold from a mechanically activated refractory sulfide concentrate, Hydrometallurgy" on DeepDyve, the largest online rental ...

The Recovery of Gold from Refractory Ores by the Use of Carbon-in-Chlorine Leaching ... Figure 2 illustrates that the hypochlorite ion assumed to be the

In this research, oxidation of sulfide and leaching of gold from a gold–bearing sulfide concentrate using chloride–hypochlorite solution has been investigated.

Oct 22, 2016· Gold Refining Forum ... If you do not have anything present in the leach which will consume high levels of hypochlorite, such as sulfides, then any gold …

Oct 24, 2013· Gold Refining Forum ... It might be just as easy to buy dry calcium hypochlorite and ... I looked again at one of the 1890's recipes for making a gold leaching ...

The use of chlorine is both the cheapest and most plentiful method for leaching gold. ... sodium hypochlorite and 33 ... Leach Gold Ore With Chlorination."

Sep 13, 2013· bleach, vinegar and salt dissolve gold ... contains sodium chloride and hypochlorite both. ... If you attempt to leach gold with this solution in an open ...

that the gold pH, various species of hypochlorite ion (OCI ), hypochlorous acid (HOCI) and aqueous chlorine ... KINETIC STUDIES FOR GOLD LEACHING OF A REFRACTORY

Chapter 8. HYPOCHLORITE LEACHING OF GOLD ORE W.T.Yen, R.A.Pindred and M.P.Lam Mining Engineering, Queen's University Kingston, Ontario, Canada K7L 3N6

Full-text (PDF) | Leaching experiments of gold and silver from roasted concentrate were carried out using a chlorine-hypochlorite solution. The leaching rate of gold ...

The Chemistry of the Extraction of Gold M.J. Nicol, C.A. Fleming and R.L. Paul ... leaching of gold and uranium, which would have obvious economic advan ...

with Sodium Hypochlorite, Followed by Extraction of Gold by Pressure Cyanidation, on Gold Removal . ... to expose gold to the leaching solution. Pyrometallurgi-

Leaching of Gold with Various Lixiviants ... hypochlorous acid, and hypochlorite acid. Complexation of gold with bromide ions can ... Leaching gold with ...

We will ignore fluorine because it does not dissolve gold. ... I’m sure that this was nothing more than sodium hypochlorite, ... Leaching:

In the QCM tests the chloride-hypochlorite alternative showed highest ... In leaching of gold a complexing ligand and oxidant are needed. Dissolution of

The Igoli Mercury Free Gold Extraction Process Acid Bleach Leaching ... THE IGOLI MERCURY - FREE GOLD EXTRACTION ... Therefore the mole balance on the hypochlorite ...

Investigations have shown sodium hypochlorite to be an effective disinfectant having broad applications. Although a number of other disinfectants (calcium ...

gold leaching with hypochlorite [ 4.6 - 6674 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We ...

gold leaching with hypochlorite_Use in Mining | International Cyanide Cyanide is manufactured and distributed for use in the gold and silver mining industries in a ...

Leaching of an oxide... | An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs ...

Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and ...

Fatma Arslan Istanbul Technical ... prior to cyanidation to treat refractory gold or es: chemical (chlorine, hypochlorite, chlorates, perchlorates, ... leaching, and ...

gold leaching with hypochlorite_ OP_AuTreatment - arlisTREATMENT OF ALASKAN REFRACTORY GOLD ORES By W R cyanidation, air oxidation, pressure oxidation, hypochlorite ...

A Method for Leaching or Dissolving Gold from Ores or Precious Metal Scrap Nicolas Geoffroy and François Cardarelli ... metallurgical leaching of gold ores by

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 ...

In this research, oxidation of sulfide minerals and leaching of gold from a gold-bearing sulfide concentrate using chloride-hypochlorite solution was investigated ...

Perchlorate, bromate, and chlorate in hypochlorite solutions: Guidelines for utilities ... and cobalt), and noble metal ion (silver, gold, platinum, ...

Sodium hypochlorite ... Then the chlorine gas with hydrochloric acid dissolves gold. Since the leach isn't as powerful as aqua regia the gold needs to be in fine ...

A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of ...

Read "Leaching of an oxide gold ore with chloride/hypochlorite solutions, International Journal of Mineral Processing" on DeepDyve, the …

CHLORIDE AS AN ALTERNATIVE TO CYANIDE FOR THE. ... hypochlorite) has to be used to ... gold can be recovered from the leach residue, ...

In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO−), which is 1,000 ...

EPA530-R-944J37 NTB PB94-201837 TECHNICAL REPORT TREATMENT OF CYANIDE HEAP LEACHES AND TAILINGS ... or hypochlorite ... Leach Gold Mine Facilities in ...

An oxide gold ore from Placer, Surigao Del Norte was subjected to chloride-hypochlorite and cyanide leaching at room temperature at 3 different hours – 4 hours, 12 ...