autoclaveing process for refractory ore
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Treatment of Refractory Gold Ores - XPS | Expert Process ...
Treatment of Refractory Gold Ores Extractive Metallurgy Once the cause has been identified, there are a number of alternatives for treating the ore. Firstly, the gold can be made more amenable to cyanidation by ultra-fine milling, followed by a hot atmospheric leach –the Albion Process.
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Recovery Refractory Resources - sgs.com
refractory resources Refractory gold ore needs pre-treatment for cyanidation to be effective in gold recovery. Ailbhe Goodbody looks at the advantages and disadvantages of the most common pre-treatment options, and speaks to some companies that offer or use the processes A refractory gold ore is gold-containing ore that is resistant to
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Process for Recovering Gold - McGill University
autoclave, thereby obviating the need for cyanide. The Need: Refractory gold ore pretreatment operations continue to attract attention as surface oxide ores are near depletion and deep seated sulphide deposits are increasingly encountered. Refractory ores are difficult to process as are copper-gold feedstocks hence recovery from these types of ...
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refractory ore crushing equipment - accgroup.co.za
autoclaveing process for refractory ore heavy industry is specialized in the design, manufacture and supply of crushing equipment used in mining industry. Chat Now; jaw crusher principle in the refractory …
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US5071477A - Process for recovery of gold from refractory ...
The present invention is directed to an improvement in a process for the recovery of gold from refractory sulfidic auriferous ores which comprises oxidizing a slurry of ore with oxygen gas under pressure in the presence of sulfuric acid, neutralizing the oxidized slurry, cyanidizing the neutralized slurry to leach gold therefrom, and recovering gold from the resultant leachate.
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US4552589A - Process for the recovery of gold from ...
A process as recited in claim 10 wherein the refractory ore contains a sulfur bearing compound which is at least partially oxidized in at least one autoclave. 17. A process as recited in claim 10 wherein the ore is less than 60% amenable to standard cyanidation techniques.
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autoclave gold recovery plant - BINQ Mining
Apr 19, 2013· The Goldstrike Autoclave Plant Design, Commissioning And Operation … plant is designed for the pressure oxidation of 1363 t/d (1500 stpd) of refractory gold ore. … design of the splash/flash system of heat recovery and the control systems.
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Newmont Mining - Mining Education - The Mining Process
Finding new mineral reserves is critical to the success of our company. Locating, extracting and processing these natural resources is a multiyear process that involves complex scientific, environmental and social planning.
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Autoclave Technology - Hatch
Autoclave Technology Hydrometallurgical pressure vessels for ore pretreatment. Home; Our Expertise ... high-pressure pretreatment process before leaching in order to improve metal recovery from the complex ore. Autoclaves are a preferred component of the process for many large-scale sulfidic refractory bodies, including such processes as Au-Ag ...
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processing of sulfuric ore by flotation concentrate ...
Jun 18, 2018· Keywords: Refractory ore, Sulfide minerals, Gold to Sulfur ratio, Pyrite, Hydrometallurgy, .. 2.3.5.2 PLATSOLTM Process . Pyrite oxidation is carried out in an autoclave to destroy the sulfides by severe chemical reactions to.
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Gold mineral processing - Hatch Ltd
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.
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Valves for autoclaves – high pressure acid leaching (HPAL)
Process overview In the mining and minerals processing industry, autoclaves are utilized to extract metals from refractory ore bodies. One of the typical processes for autoclaves is high pressure acid leaching (HPAL), which is often used for the extraction of nickel from laterite ore bodies but can also be applied in copper and cobalt production.
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pressure oxide technology to process refractory gold ore
pressure oxide technology to process refractory gold ore Oxy-hydrogen Flame Manual Ampoule Glass Sealing Ampoule . Working Pressure kg/cm2, 1.3, 1.3 Does not generate hydrocarbons, carbon monoxide, or carbon dioxide.
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Double-Refractory Carbonaceous Sulfidic Gold Ores ...
The mill/autoclave facility was dedicated to the processing of sulfidic single-refractory ore. Material with high preg-robbing characteristics was generally processed at the roaster facility described subsequently. In spring 2009, the scoping study for the implementation of a thiosulfate-based process at the mill/autoclave facility was initiated.
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Pressure chloride leaching of a refractory gold ore
A series of metallurgical methods were employed to recover gold contained in a pyrite matrix. Direct cyanidation of the ore at P80 = 75 μm yielded only 33% recovery after 24 hours leach time.
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TECHNOLOGY FOR PROCESSING OF REFRACTORY ... - Albion …
from flotation concentrate produced from refractory ore of one Russian deposit. The testing has shown that Albion technology makes it possible to process refractory products with quite small capital investments. It enables involving medium and small refractory gold …
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ECONOMICS OF REFRACTORY GOLD ORE PROCESSES
ECONOMICS OF REFRACTORY GOLD ORE PROCESSES John E. Litz and R. Wayne Carter 119th TMS Annual Meeting February 18-22, 1990 Hazen Research, Inc. 4601 Indiana Street Golden, Colorado 80403 Abstract Refractory gold ore pretreatment processes continue to receive much attention. ... prepared for each oxidation process and each sulfur level with and ...
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Iodide Pressure Oxidation Gold Leaching - Autoclave
The pressure oxidation process is especially suitable for the sulfide type of refractory ores. It includes two stages of operation. First, the refractory ore is subjected to an autoclave oxidation.
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POX Oxidation of refractory gold ore - Hydrometallurgy ...
Hi as you know one of the method for treatment of refractory gold ore is POX. could you please explain about the limitation of S content in the concentrate? because I found in a Chinese text that the maximum content of S in the sulfide concentrate not be more than 10%. if it is true, please tell
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Petropavlovsk processes first refractory ore at POX
Autoclave one processed 320 t of refractory ore concentrate, yielding a gold recovery rate of 93%, which is close to the projected design recovery of 98%. ... as we begin to process our refractory ...
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Mining gold turns to scientific world - Las Vegas Sun ...
Mining gold turns to scientific world. Alison Calkins. ... microscopic gold from refractory ore -- the ore out of which it's difficult to get gold because of the presence of sulfides and active ...
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Petropavlovsk processes first refractory ore at POX hub ...
Following the hot commissioning process of the POX Hub and supporting equipment, announced 27 November 2018, the Company began processing refractory concentrate through Autoclave 1. The process of sulphide oxidation inside the autoclave vessel is working well, achieving gold recovery of 93%, close to projected design recovery of 98%.
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PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE …
Pressure oxidation of pyrite-arsenopyrite refractory gold concentrate 103 Autoclave oxidation tests were conducted in Büchi ecoclave model 075 titanium autoclave. The total volume of the autoclave vessel was about 1.1 dm3 and it was equipped with magnetic agitation unit, gas inlet and outlet, and sampling system with
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Processing of Konkola copper concen- trates and Chingola ...
medium of the copper leached in the autoclave. Key to the concept is the introduction of a new copper SX circuit operating at a high ‘delta’ copper which provides a raffinate of sufficient acid strength (70–80 g/l H2SO4) to attack the refractory copper-bearing micas in the CRO ore at elevated temperatures.
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Barrick invests heavily in new processing | nnbusinessview.com
Roasters and autoclaves are advanced milling processes for recovering gold from refractory ores, or ores that require complex treatments to free the gold molecules from either carbonate or sulfide minerals. Roasters use fine grinding and heat to burn off the carbonate minerals and recover gold.
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autoclave mining process - retrofilmfestival.eu
Valves control various liquid and gaseous flows in gold autoclave pressure oxidation process Autoclave pressure oxidation (POX) is an effective pre-treatment option when extracting gold from refractory ore bodies, such as pyrite and arsenopyrite.
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Processing of refractory gold ores - ResearchGate
The treatment process of a low-grade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by all-sliming cyanidation ...
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Pressure Oxidation - CalderaEngineering
Pressure Oxidation (POX) is a process used to extract gold, copper, zinc, molybdenum, and uranium from refractory ore bodies. The POX process utilizes elevated temperatures (roughly 230 degrees Celsius), elevated pressures (roughly 35 bar or 510 psi), and oxygen to liberate the minerals from refractory …
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Determining Gold Balance In Refractory Gold Ores ...
Determining gold balance in refractory gold ores Feed, mill and autoclave products were studied at different stages of an autoclave process to identify the reason for variable recovery in some ores. Under the standard operating conditions of the autoclave mill, there is a high recovery of gold, which occurs predominately as chemically included ...
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Pressure Oxidation | Mining | SGS
The process is particularly well suited for treating refractory gold ores, which give low recovery when directly leached with cyanide. SGS is a world leader in batch and pilot plant testing and flowsheet development for pressure oxidation processing.
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