PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE …
Pressure Oxidation Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores. The main pressure oxidation products from iron sulfide minerals are sulfuric acid (and metal sulfates) and hematite. Depending on the conditions within the autoclave, acid containing iron compounds can be formed. Such compounds include basic iron sulfate (BFS) and …
Pressure Oxidation Pretreatment of Refractory …
01.02.1984 · Pressure oxidation of gold containing concentrates and ores is an effective pretreatment for liberating refractory gold. This is particularly true when an appreciable portion of the gold is associated with sulfides and is not amenable to conventional cyanidation. A brief review of the literature on pressure oxidation of refractory gold materials is presented. The chemistry of the …
(PDF) Pressure oxidation of double refractory gold ...
01.01.2013 · The reasons for gold-bearing materials refractory nature and behaviour features of carbonaceous matter during pressure oxidation of concentrates were discussed. The stone processes that lead to...
Pressure Oxidation Refractory Gold
Pressure Oxidation Refractory Gold. Pressure oxidation of pyritearsenopyrite refractory gold concentrate 105 350 kpa 15 or increased very slowly test 3 165176c 1050 kpa 5 at higher tem perature and oxygen pressure the oxygen consumption was more rapid and reached a steady level in 5560 minutes test 9 i. More Details
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 pre-treatment before the gold can be adequately extracted.
Autoclave Pressure Oxidation Gold Au
Autoclave Pressure Oxidation Gold Au. A carbonaceous refractory sulphide ore is processed in an autoclave pressure oxidation plant and subsequently subjected to a cyanide leaching an initial mineralogical study of the feed ore by quantitative dynamic sims analysis has shown that 95 of the gold is contained as submicroscopic gold in pyrite with the remainder contained in primary feoxide ...
Pressure oxidation - Wikipedia
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 pre-treatment before the gold can be adequately extracted. [1]
ALTA MetBytes - Whats Happening in Gold Ore Processing
CSIRO, Australia, has developed a thiosulfate-based reagent system for gold leaching that has excellent stability and shown broad applicability in the laboratory compared to the thiosulfate system commercially implemented by Barrick to treat double refractory gold ore following pressure oxidation at its Goldstrike Mine in Nevada, USA.
Pressure Oxidation | Mining | SGS
Pressure oxidation (POX), high pressure oxidation (HiPOX) and ACTIVOX autoclave leaching are viable industry-standard technologies used to recover gold and other accessory metals. The process is particularly well suited for treating refractory gold ores, which give low recovery when directly leached with cyanide.
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 …
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. A refractory ore generally contains sulfide minerals, organic …
Lowering the Threshold for Refractory Gold Deposits with N.
encapsulating the gold particles in refractory ore. Biooxidation occurs at near ambient pressures and temperatures, whereas pressure oxidation occurs at 200 psig, and roasting at 1,000ºF. Inherently, biooxidation processes require less capital and less skilled operating and maintenance personnel.
Pressure oxidation of pyrite-arsenopyrite …
Pressure oxidation of pyrite-arsenopyrite refractory gold concentrate Article in Physicochemical Problems of Mineral Processing 49(1):101-109 · January 2013 with 243 Reads How we measure reads
Acid leaching decarbonization and following …
16.07.2016 · Carbonate decomposition of carbonic refractory gold ore and the following pressure oxidation were studied. In the carbonate decomposition procedure, the effects of liquid-to-solid ratio and reaction time on decomposition ratio of carbonate were investigated. The experimental result shows that the decomposition ratio of carbonate is 98.24% under the conditions of liquid-to-solid ratio of 5:1, …
PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE REFRACTORY …
PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE REFRACTORY GOLD CONCENTRATE Lauri RUSANEN, Jari AROMAA, Olof FORSEN Aalto University, Department of Materials Science. P.O. Box 16200, Aalto, Espoo, Finland, [email protected] Abstract: Refractory gold ores have poor gold recoveries with direct cyanide leaching. Typically the refractoriness is due to encapsulation of the gold …
Gold recovery from refractory gold concentrates by ...
Pressure oxidation technology for the treatment of refractory gold concentrates has been deployed in some countries. Shuiyindong gold deposit is one of the Carlin-type deposits which is a typical difficult-to-treat gold deposit, located in Guizhou province in western China.
Recovery Refractory Resources - SGS
Pressure oxidation, or autoclaving, was originally developed for processing base metal concentrates. In the last 30 years, it has been adapted for processing refractory gold ores and concentrates where gold is trapped in sulphide minerals, such as pyrite or arsenopyrite.
Venus/Rox rack up bonanza gold hits at Grace …
Venus Metals and Rox Resources have struck high-grade gold again in granite rock at the exciting Grace discovery at their historic joint-ventured Youanmi project in WA. The latest bonanza gold hits add to mounting evidence that a style of gold mineralisation not recognised at Youanmi previously has been discovered by the dynamic duo.