(PDF) Evaluation of pretreatments to increase gold ...
A pretreatment to remove and recover base metals present in complex sulfide refractory ores is proposed as a method to improve the extraction of precious metals with thiourea.
Treatment of Refractory Gold Ores | SpringerLink
12%The treatment of refractory gold ores containing carbonaceous material and sulfides. In Gold and Silver Leaching: Recovery and Economics, edited by W. J. Schlitt, W. C. Larson, and J. B. Hiskey. New York: SME-AIME, 17–22.
Options to Treat Refractory Ores - Albion Process
options for treating more complex orebodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide- leaching circuits, even when the ore is finely ...
ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES
ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES Duncan Turner (Core Resources) Mike Hourn (Xstrata Technology) 2 Presentation Topics • Overview of Albion Process ... (e.g. pyrite) to make refractory gold available for cyanide leaching Stirred Mills Feed P 80 ~75 µm Product P 80 10-12 µm Atmospheric Pressure Temperature ~95oC Oxygen ...
Treatment of carbonaceous refractory gold ores - ScienceDirect
In addition the paper describes the various pre-cyanidation treatment methods for carbonaceous refractory gold ores namely, (1) flotation and depression, (2) blanking, (3) the use of activated carbon or resin in leach, (4) roasting, (5) chemical oxidation and (6) bioleaching. Previous article. in …
Recovery Refractory Resources - SGS
As a result, refractory ores require physical or chemical pre-treatment for adequate gold recovery to be achieved through traditional cyanidation and carbon adsorption processes. Pyrite and arsenopyrite are the most common host minerals in refractory gold deposits. "Recent introduction of hydrometallurgi-cal pre-treatment processes, such as
Review Pretreatment Process on Refractory Gold Ores with As
Atmospheric acid treatment usually uses permonosulfuri-cacid to oxidize refractory gold or e with As. It's said that the method is not suitable for all refractory gold ores, but has good results in dealing with symbiotic arsenopyrite gold ore. Because arsenopyrite is easily oxidized. Compared with roasting pretreatment and pressure oxida-
Refractory gold ores: Challenges and opportunities for a ...
Gold miners are facing a reserves crisis, and what is left in the ground is becoming more and more challenging to process.Refractory gold reserves, which require more sophisticated treatment methods in order to achieve oxide-ore recovery rates, correspond to 24 percent of current gold reserves and 22 percent of gold resources worldwide (Exhibit 1).
Processing of refractory gold ores - ScienceDirect
Processing of refractory gold ores 1037 The oxidation tanks themselves are often configured in four stages with additional tanks employed in the first stage to accommodate the increased oxidation rates and aeration requirements in the initial phases of the reaction. Residence times in the tanks are often of the order of 3 to 4 days.
(PDF) Refractory gold-bearing ores: a review of treatment ...
The problem of the refractory nature of gold-bearing sulphide ores is described and possible pretreatments are reviewed. Among them, bioleaching is an …
(PDF) Refractory gold-bearing ores: a review of treatment ...
Hydrometallurgy, 34 (1994) 383-395 383 Elsevier Science B.V., A m s t e r d a m Refractory gold-bearing ores: a review of treatment methods and recent advances in biotechnological techniques Nieves Iglesias and Francisco Carranza Chemical Engineering Department, Universityof Sevilla, 41012 Sevilla, Spain (Received January 10, 1993; revised version accepted March 16, 1993) ABSTRACT …
(PDF) Cyanidation of Refractory Gold Ores: A Review
In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1.09% As, and 0.5% sulfur were ...
Treatment of Refractory Gold Ores | SpringerLink
The treatment of refractory gold ores containing carbonaceous material and sulfides. In Gold and Silver Leaching: Recovery and Economics, edited by W. J. Schlitt, W. C. Larson, and J. B. Hiskey. New York: SME-AIME, 17–22.
Treatment of carbonaceous refractory gold ores - ScienceDirect
Refractory ore treatment by this method normally gives gold extraction in excess of 95%. Autoclave leaching of refractory gold ores on an industrial scale started in the 1980's because of the high gold price and because pressure oxidation is an environmentally accepted alternative to roasting.
Refractory Gold Ore Treatment Methods
The leachox Process is another recently developed hydrometallurgical approach to the treatment of refractory gold ores. The technology is owned and marketed by Maclgwyn Mineral Services (MMS) based in the United Kingdom. This process has been installed at the Vasgold project in Kazakhstan, and the development, design, construction, and ...
