autoclave oxidization of gole ore

  • POX Oxidation of refractory gold ore

    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

  • Pressure oxidation overview

     · Oxidation releases encapsulated gold grains from the sulfides and makes the oxidation residue of the ore or concentrate more amenable for gold recovery by cyanidation in a subsequent leaching step. Pressure oxidation of gold ores is therefore a pretreatment leaching step to …

  • Pressure oxidation

    The pressure oxidation process is used to prepare such ores for conventional gold extraction processes such as cyanidation. It is performed in an autoclave at high pressure and temperature, where high-purity oxygen mixes with a slurry of ore.

  • Process and technology of gold ore dressing …

     · (2) Autoclave oxidation is mainly to add acid or alkali under the higher temperature and pressure of the more difficult gold ore to decompose the sulfide, so that the gold is exposed, contact with the cyanide solution, and react to form a gold cyanide complex.

  • Gold Sulphide Ore Oxidation by Alkaline Pressure

     · The authors of this study have recently applied pressure leaching with iodide to refractory gold ores, a technique developed as a noncyanide process for refractory gold ores. This new process is a one stage operation, where the oxidation of sulfide and the dissolution of gold …

  • Pressure Oxidation Overview

     · Oxidation releases encapsulated gold grains from the sulfides and makes the oxidation residue of the ore or concentrate more amenable for gold recovery by cyanidation in a subsequent leaching step. Pressure oxidation of gold ores is therefore a pretreatment leaching step to enhance gold …

  • Pressure Oxidation Circuit

     · The autoclave was designed to operate at 180 C (356 F) with a slurry residence time of 48 minutes. Design criteria calls for 75% sulfide oxidation through the circuit. Gold is leached and recovered from the oxidized slurry in a six stage CIL circuit.

  • a flow sheet of autoclave leaching of gold

    autoclaves an overviewScienceDirect Topics K.G. Thomas1, M.S. Pearson2, in Gold Ore Processing Second Edition, 2016 This technique uses autoclave leaching with pure air/oxygen, high pressure, and temperature The flow sheet for the autoclave facility is shown

  • Arsenic Precipitation from Solutions in Autoclave …

    Autoclave oxidation is a promising method of pretreatment of the refractory sulfide-arsenic gold-bearing raw materials before cyanidation. A serious problem of auriferous ores autoclave-hydrometallurgical processing is the removal of contained arsenic into relatively harmless and capable of being kept forms.

  • Pressure Oxidation | 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 …

  • ''autoclave oxidation ore for gold extraction''''

     · Gold extraction from well washed ore, after oxidation at 210 C for 66 minutes in the autoclave, … » More detailed Gold recovery using controlled oxygen distribution pressure oxidation

  • PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE REFRACTORY …

    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

  • Development of a Production Scheme for Processing …

     · Results are provided for a study of the substance composition of rebellious gold-copper-arsenic concentrate. The nature of gold dissemination in concentrate mineral components is demonstrated and it is established that gold is associated to a considerable extent with iron sulfides, and less with oxides. Based on results of substance analysis, comparative production schemes are …

  • Macraes Operation

    Its annualised gold production is split approximately 75% to open pit production and about 25% underground production. Macraes Operation has celebrated several extraordinary milestones, including pouring five million ounces and having its 10,000 th bar poured, both in 2019. Between 2007 and 2016, flotation concentrate from the Reefton Mine was ...

  • Autoclave

    This technique uses autoclave leaching with pure air/oxygen, high pressure, and temperature for the treatment of refractory carbonaceous ore treatment (Sibrell, 1991; Schmitz et al., 2001b). Pressure oxidation is used to treat highly refractory sulfide ores containing chalcopyrite, pyrite, pyrrhotite, and/or arsenopyrite to release gold for subsequent cyanidation; this is discussed in detail ...

  • Pressure Oxidation of a Refractory Sulfide Concentrate and …

     · Normally, gold is extracted from neutralized autoclave leach residue by cyanidation. Silver extraction, however, remains low due to silver jarosite formation. Atmospheric digestion of the oxidized solids slurry with lime at 90 to 95 °C prior to cyanidation enhances the …

  • Process for the recovery of gold from refractory ores by …

    What is claimed is: 1. A process for recovering gold from a refractory ore slurry, said process comprising the steps of: introducing the slurry to at least one agitated autoclave maintained at an autoclave temperature in excess of about 150 C. and an autoclave

  • Autoclave Use In Gold Ore Dressing

    The Gold Strike Pressure Oxidation Plant Process Feb 06, 1996 a process for recovering gold from a refractory auriferous ore containing sulfide sulfur.An aqueous slurry of refractory auriferous ore is subjected to pressure oxidation in an autoclave while the ...

  • PRETREATMENT OF GOLD ORE CONTAINED S AND As

    autoclave and then take out the ore and solution. After filtrating, Au can be cyaniding-leached from the ore pretreated. Table.1 Chemical Composition of Ore Au g/T As % S % C % Gold Concentrate Rich Gold Ore Gold Ore 38.82 36.65 5.28 3.07 15.55 3.19

  • ''autoclave oxidation ore for gold extraction''''

     · The Lihir Gold Project: Pressure Oxidation Process Development …for "The Lihir Gold Project: Pressure Oxidation Process …Gold extraction from well washed ore, after oxidation at 210 C for 66 minutes in the autoclave, … »More detailed

  • Biological Oxidation Of Sulphides In Gold Ore

    Biological Oxidation Of Sulphides In Gold Ore Behavior of gold and silver from the ore.2 materials and methods 2.1 materials in this study, high grade akoluk ordu refractory goldsilver ore was used.A total amount of 150 kg ore sample was obtained from the deposit.Hand-picked pieces of the ore were used to prepare the polished sections for mineralogical examination under an ore.

  • Gold recovery using controlled oxygen distribution …

    A process for recovering gold from a refractory auriferous ore containing sulfide sulfur. An aqueous slurry of refractory auriferous ore is subjected to pressure oxidation in an autoclave while the distribution of oxygen to the various compartments of the autoclave is ...

  • Autoclave Circuit & Gold

     · Sulfide sulfur oxidation through the autoclave is typically of the order of 90—92%. Residual S exiting the autoclave is targeted at less than 0.2%. Values greater than 0.25% S" typically result in poorer gold recoveries in the C1L circuit.

  • ALTA Gold 2012 E-Doc

    Direct cyanidation of Ore A yielded poor gold extractions in the mid twenty percentile for ore ground to a P 80 of 53 micrometres. Some test work investigated cyanidation of tails but the grade of the gold in the tails was significantly low to be of value (0.2 g/tkg/t.

  • Autoclave Pressure Oxidation Gold Au

    20191110Pressure oxidation Continuous Concrete Mixing PlantsIt is performed in an autoclave at high pressure and temperature where highpurity oxygen mixes with a slurry of ore. high pressure oxidation gold. Ready Mix Concrete Batch Plants. Customie ready

  • ON THE PHYSICOCHEMICAL PROBLEMS OF AQUEOUS OXIDATION OF POLYMETALIC GOLD BEARING SULPHIDE ORE IN AN AUTOCLAVE

    oxidation in autoclave. The results show that modelling of the process parameters of oxidation in autoclave can be used to predict efficiency of pre-treatment of sulphide refractory ores for valorisation of gold.* Key words: polymetallic ore, gold, oxidation, oxygen

  • TECHNOLOGY FOR PROCESSING OF REFRACTORY GOLD-CONTAINING CONCENTRATES BASED ON ULTRAFINE GRINDING AND ATMOSPHERIC OXIDATION

    Autoclave oxidation* 81 более 98 520 670 94 97.2 Albion 190 64 360 660 11 95.9 * autoclave oxidation conditions: 210 C, O 2 addition at 10 bar, oxidation for 1 h 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 ials %. n % Oxidation time, h

  • Autoclave Technology

    Every autoclave and preleach circuit is a custom design, based on the experience and expertise of the design team. With the right innovative and proprietary equipment designs, your pressure-oxidation needs can be effectively met. Our services are unique to your needs. We operate through the entire range of activities: feed-stock testing ...

  • Pressure oxidation

    Iodide Pressure Oxidation Gold Leaching - Autoclave

  • autoclave technology client list pressure oxidation

    Client Getchell Gold Corporation (formerly FirstMiss Gold Inc.) Location ... mine and construction of a new mill utilizing autoclave technology to process 3,000 tons ... For treating refractory gold ore in pressure oxidation autoclaves, the process ...

  • PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE METATES GOLD PROJECT EXPERIENCE

    Pressure oxidation test work was conducted in North America and in Australia on concentrates containing 2.8 – 3.8 g/t gold, 100 – 117 g/t silver, 24 – 26% iron and 27 – 29% sulfur. The results of this work and a high level presentation of their impact onthis paper.

  • REFRACTORY GOLD ORE OXIDATION — SIMULATION …

     · Pressure oxidation is an effective method of liberating gold values from many refractory sulfide ores. Pressure oxidation testwork is most conveniently and economically conducted in batch laboratory autoclaves; however, the chemistry and kinetics may …

  • US4738718A

    ore gold autoclave slurry Prior art date 1985-10-28 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee ...

  • Acid leaching decarbonization and following pressure …

     · 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 refractory gold

    Autoclave and Pressure Oxidation Mining and Minerals. Pressure oxidation was developed for processing refractory ores where gold is occluded in the sulfide minerals typically pyrite or arsenopyrite Oxidation of the sulfides at elevated temperatures and pressures liberates the gold allowing it to be economically recovered by conventional circuits.

  • Valves for gold autoclave pressure oxidation (POX) | Neles

    Autoclave pressure oxidation (POX) is an effective pre-treatment option when extracting gold from refractory ore bodies, such as pyrite and arsenopyrite. While gold processing plants are the most common utilizers of POX technology, the process can also be …

  • US5536297A

    Gold is recovered from the gold-bearing leachate by cementation, adsorption on an adsorbent, or cyanidation. A process for recovering gold in which an ore slurry of refractory sulfidic and refractory carbonaceous ore having preg-robbing characteristics due to the presence of organic carbon is subjected to pressure oxidation in an autoclave.

  • autoclave pressure oxidation gold au

    Deportment of gold in an autoclave pressure Deportment of gold in an autoclave pressure oxidation ACPOXcarbon in leach CIL residue of pregrobbed surface gold in two different forms metallic gold and Au Free Online Chat Processes Autoclaving Circuit Gulinc ...

  • Design of the New Lihir Gold Pressure Oxidation Autoclave

    Newcrest Mining Limited, originally as Lihir Gold, has operated a pressure oxidation plant for the recovery of gold from refractory ore since 1997. The mine and gold plant are located on Lihir Island in Papua New Guinea. Design of the original pressure oxidation circuit ...

  • Pressure-oxidation autoclave as an analogue for acid …

    Gold extraction at the Macraes gold mine in New Zealand involves concentration of pyrite and arsenopyrite, oxidation of those sulphides, then cyanidation. The ore concentrate is predominantly Otago Schist host rock (andesitic composition) with up to 15% sulphides. The oxidation step is conducted on ore concentrate slurry in an autoclave at 225°C and 3,800 kPa oxygen gas pressure …

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