Refractory Gold Ore Treatment Methods
Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and …
Pretreatment Process on Refractory Gold Ores with As
Currently, there are four main methods of pretreatments of refractory gold ores with As. Pretreatment options for dealing with refractory gold ores are illustrated in Fig. 1 and described in detail in the subsequent sections. Fig. 1. General process options for pretreating refractory gold ores. 2. Roasting Oxidation Pretreatment
Application Note Refractory Gold Pretreatment - pH
150μm ore Flotation Thickening Separation Lime Addition Cooling Water & O 2 Addition Neutralized Pulp to Cyanidation and Electrowinning Lime Addition Air Addition Low pH Barren Liquid to Waste Treatment For Neutalization Application Note Refractory Gold Pretreatment - pH 2 Bacterial Oxidation Bacterial oxidation (Bio-oxidation) of refractory ...
Review Pretreatment Process on Refractory Gold Ores with As
refractory gold ores with As. Pretreatment options for deal-ing with refractory gold ores are illustrated in Fig. 1 and described in detail in the subsequent sections. 2. Roasting Oxidation Pretreatment So far, the application of roasting oxidation pretreatment has a history of 70 years. The principle is to destroy the ores
Developments in the pretreatment of refractory gold
pressure oxidation refractory gold:Pressure Oxidation is a process for extracting gold from refractory ore The most common refractory ores are pyrite and arsenopyrite which are sulfide ores that trap the gold within them Refractory ores require pretreatment before the gold can be adequately extracted. More Detail; Gold mineral processing Hatch Ltd
refractory ore gold and pretreatment
Mineralogy and Pretreatment of a Refractory Gold (B) Fine-grained gold, which was highly dispersed in the ore-bearing minerals, and the large amount of stratified silicate minerals were the main reasons for the poor pretreatment effect of the refractory gold ore …
Gold extraction - Wikipedia
A "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.
Improvement of Gold Leaching from a Refractory Gold ...
Refractory gold ores have increasingly been the main source of gold production with the exhaustion of amenable gold ores. Of the 2630 tons of total world gold production in 2011, about 25% was produced from refractory gold deposits, and of the top 20 gold operations in 2011, eight were processing refractory ores [1].
refractory ore gold and pretreatment 2012
The Oxidation Pretreatment of a Sulfidic Refractory Gold Ore with ... The Oxidation Pretreatment of a Sulfidic Refractory Gold Ore with Pyrolusite ... The optimum leaching conditions were pyrolusite/gold ore mass ratio of 3.0, H2SO4 concentration of 3.0 M, temperature of …
(PDF) A Preliminary Study on Nitric Acid Pre-treatment of ...
A Preliminary Study on Nitric Acid Pre-treatment of Refractory Gold/silver Ores ... The nitric acid pre-treatment experiments for refractory silver ore and gold/silver concentrate were performed ...
Improved gold and silver extraction from a refractory ...
The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The latter mineral was identified to be the most important ...
ALTA Gold 2012 E-Doc
A significant contemporary challenge for gold mining companies is to define economic process options for treating more complex ore bodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves.
(PDF) Pretreatment with Ozone for Gold and Silver Recovery ...
In this work ozonization was studied as pretreatment for two Mexican refractory ores in order to increase the gold and silver extraction. Two methods for contacting ozone with the mineral were ...
Microwave pretreatment of a double refractory gold ore ...
With regards to the application of microwaves to refractory gold ores, Haque, 1987a, Haque, 1987b has studied the microwave pretreatment of refractory sulphidic ores and achieved gold extractions of over 98%. However, there is no information published on the microwave processing of the double refractory gold ores.
pretreatment of refractory ores prior to gold leaching
pretreatment of refractory ores prior to gold leaching. ... ECONOMICS OF REFRACTORY GOLD ORE PROCESSES. 2 INTRODUCTION Refractory gold ores present a number of problems to the gold producer. Much has been written about the suitability of particular pretreatment... Rebellious Ores: Sulfides, Selenides and Tellurides.
refractory ore gold and pretreatment 2012 zimbabwe
Refractory gold ore pretreatment Treatment of refractory gold ore whole ore and flotation concentrates has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory. Refractory pretreatment processes include pressure oxidation, biological oxidation and various forms of.