(PDF) Cyanidation of a pyrrhotite-bearing gold ore
The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined...
Cyanidation of a pyrrhotite-bearing gold ore
The presence of pyrrhotite in gold ores is known to have a negative impact on the dissolution of gold and on the consumption of cyanide. This report presents the results of a cyanidation study on a sample containing pyrrhotite as the only cyanicide. The purpose of …
Cyanidation of a pyrrhotite-bearing gold ore | Semantic ...
Cyanidation of a pyrrhotite-bearing gold ore. The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal.
Cyanidation of a pyrrhotite-bearing gold ore - 911 ...
ABSTRACT The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. A leach using 8ppm dissolved oxygen yielded only 82.3% gold extraction with a 0.29kg/t NaCN consumed.
Cyanidation Of A Pyrrhotite Bearing Gold Ore
Cyanidation of a pyrrhotite bearing gold ore that gold cyanide is reduced on the surface of sulphide minerals adams et al996e leach slurry flows by gravity to the cip circuite oxidation of pyrrhotite in a basic media yields iron hydroxide and sulphate according to equation.
The effect of grinding chemistry on cyanide leaching of ...
For that reason, cyanide gold leaching is very efficient when ceramic or high chromium media was used during the grinding of the ore. It can be expected that the leach behaviour would be different if leaching is preceded by pre-oxidation, as is often done for pyrrhotite bearing ores.
Improvements in gold ore cyanidation by pre-oxidation with ...
It is known that the presence of sulphidic minerals in the cyanidation of gold ores may cause significant consumption of oxygen supplied in the injected air. This may result in dissolved oxygen starvation for the oxidative leaching of the gold, and ultimately it will reduce the maximum attainable recovery of …
cyanidation of a pyrrhotite bearing gold ore
cyanidation of a pyrrhotite bearing gold ore the process of gold extraction from its ore Micromax Funbook Gold extraction or recovery from its ores may require a combination of comminution, mineral processing, 353 361 Cyanidation of a pyrrhotite bearing gold ore Get Price MODELING OF GOLD CYANIDATION Maintained by Rudi
Bottle Roll Testing for Cyanidation of Gold Ores: Problems ...
Cyanide leaching of gold is a very common methodology for evaluation of low grade gold ores. Despite risks associated with cyanide, the method proved to be highly effective provided that necessary precautions are taken. Gold cyanidation in field scale is mainly conducted through heap leaching and tank leaching methods.
Gold Metallurgy and Leaching Process
Consumption of oxygen from solution, e.g. Pyrrhotite accompanying gold in its ores decomposes in an alkaline medium forming ferrous hydroxide (Fe(OH) 2) and sodium sulphide each of which oxidize readily, depleting 0 2 levels in solution. Formation of complex cyanides, eg.
Establishing thE ProcEss MinEralogy of gold orEs
A notable example of such a double- refractory carbonaceous sulfide ore is at Barrick’s Goldstrike Mine where gold occurs in pyrite in refractory sulfide ore and double-refractory sulfidic/ carbonaceous ore. These ores are pretreated by autoclave and roaster prior to cyanide leaching (Thomas et al., 2000; Wickens et al., 2003).
(PDF) Reactions of gold and sulfide minerals in cyanide media
The effect of pyrite, pyrrhotite, chalcopyrite, realgar and arsenopyrite on gold dissolution in cyanide media was investigated. The cyanidation of synthetic gold ores in the presence of various...
Gold cyanidation - Wikipedia
Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction.
Gold processing - Mining and concentrating | Britannica
When gold dissolution is complete, the gold-bearing solution is separated from the solids. With ores of higher gold content (i.e., greater than 20 grams of gold per ton of ore), cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent for …
cyanidation process in tin ore advanced
Cyanide Process Extraction Of Gold Through Cyanidation. Gold is usually found in low concentration in the form of ore which is mined. Gold should be separated from other minerals present in the ore. As gold is insoluble, it should be separated from other minerals to make it soluble.