Refractory Ore Processing Gold

Sulfides Selenides and Tellurides rebellious and refractory gold ores

Gold bearing tellurides were important in some of the richest ores at Goldfield Nevada high grade ore that contained upwards of 10 000 ounces of gold per ton If you have tellurides in your ore it s important that you are aware of that fact because it affects how you will process it

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GOLD RECOVERY OF REFRACTORY SULFIDE CONCENTRATES

refractory sulfide gold ore provided by PT USA a small scale gold mining in West Java For experimental tests the ore sample was prepared by grinding and sieving and dried in air at room temperature for 24 hours The refractory gold ore concentrate was ground down to 74 µm using laboratory ball mill and steel balls

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SIPS2016 The Gold Recovering Process with Ore Roasting

The mineral processing research of gold ore with arsenic carbon fine disseminated has been the focus of the work of researchers these years various methods and technology for Refractory gold ore have been studied each one has its own merits the ore roasting method is one of the world recognized can effectively solve this kind of ore but more the main Chinese reported in the experimental

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Developments in the pretreatment of refractory gold

processing refractory gold ores especially development in the pretreatment of refractory gold minerals by nitric acid These processes include the high pressure and the atmospheric pressure oxidation methods High pressure oxidation processes are difficult to carry out because they require high capital cost autoclaves Atmospheric pressure oxidation processes are easier to manipulate but

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Extraction of Gold from a Low‐Grade Double Refractory Gold

Extraction of Gold from a Low‐Grade Double Refractory Gold Ore Using Flotation‐Preoxidation‐Leaching Process Yongbin Yang School of Minerals Processing & Bioengineering Central South University Changsha Hunan 410083 China Search for more papers by this author Shiqian Liu School of Minerals Processing & Bioengineering Central South University

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The Mining Process Newmont Corporation About Us

Refractory ore resists normal processing methods as the high sulfide minerals trap gold particles making it difficult for the cyanide to reach the gold and leach it Heating To leach gold from refractory ore it must be subjected to high temperature high pressure and/or oxygen

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Novel biooxidation process for low grade refractory

The gold extraction after 43 days of Sand Farming showed 72% and 68% Tank biooxidation showed more gold extraction improvement mainly because of the much smaller particle sizes Sand Farming with coarser materials showed promising results that can applied to treat the low grade sulphidic refractory ores CITATION Ahn J Wu J and Lee J 2021

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OPTIMISATION OF ROASTING OF ARSENIC CARBON REFRACTORY

CiteSeerX Document Details Isaac Councill Lee Giles Pradeep Teregowda To optimize the technology for Bakyrchik deposit gold ore processing according to roasting cyani dation pattern the researches on sorption properties and the influence of carbon bearing minerals content in calcine on gold recovery have been carried out The results of conducted investigations showed that sorption

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The Mining Process Newmont Corporation About Us

Alternative Ore Processing We use alternative gold recovery methods in some processing plants to accommodate different ore characteristics or other requirements For example ore that has a high level of sulfide minerals or carbon or both is called refractory ore Refractory ore resists normal processing methods as the high sulfide minerals trap gold particles making it difficult for the

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Refractory gold ores and concentrates part 1

2021 Refractory gold ores and concentrates part 1 mineralogical and physico chemical characteristics Mineral Processing and Extractive Metallurgy Vol 130 No 3 pp 240 252

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Refractory gold ores in Archaean greenstones Western Australia mineralogy gold

Arsenical ores vary from highly refractory to free milling Arsenopyrite in highly refractory ores is finer grained As deficient 27 at % As contains high average concentrations of submicroscopic gold 60 270 ppm but does not contain inclusions of particulate gold Arsenopyrite in free milling ores is coarser grained less As

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Refractory gold BioMineWiki

Refractory gold ore is generally defined as ore containing gold which cannot be satisfactorily recovered by conventional methods used to treat non refractory gold ores like gravity concentration or Cause The refractory nature of these ores can be attributed to the presence of substances that consume the cyanide reagent before it can dissolve the gold preferentially adsorb

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New Chloride Leaching Process for Gold Extraction from Refractory Ores Gold

New Chloride Leaching Process for Gold Extraction from Refractory Ores From certain gold ores known as refractory gold attainment of higher leaching temperatures and ores the gold cannot be fully recovered by direct higher efficiencies possible Decomposition of the cyanide leaching A major cause of this is the refractory sulfides and arsenides occurs in the occurrence of much of the

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Eco friendly gold leaching Eco Goldex Reagent

Eco Goldex O series ; The O Series it refers to Ores is specially formulated and manufactured with the purpose of replacing the toxic sodium cyanide in gold/silver/PGM rock ore leaching The O series can compete sodium cyanide easily in most rock ore processing including gold leaching rate similar or even better agent consumption similar or slightly higher and leaching time similar or

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Synergistic extraction of gold from the refractory gold

A synergistic extraction method for gold from the refractory gold ores via ultrasound and chlorination oxidation was developed The effects of solid liquid ratio extraction time ultrasound power NaClO concentration and NaOH concentration on the extraction rate of gold from the refractory gold ore were investigated

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PorgeraJV Our Operation page Porgera Gold Mine Papua New

Ore is processed in a complex minerals processing plant The open pit and underground mines supply both course gold and refractory ore to a processing plant that includes crushing grinding gravity recovery flotation oxidation autoclave and Carbon In Pulp CIP circuits to produce a gold dore product and a high grade pyrite concentrate for shipment to offsite refineries and smelters for

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Atmospheric alkaline pre oxidation of refractory sulphide

Atmospheric alkaline pre oxidation of refractory sulphide gold ores Creator Rego Alan Joseph Publisher University of British Columbia Date Issued 2021 Description Four iron sulphide containing gold ores from the White Mountain mine in the Jilin Province China were studied to examine the benefits of using oxidative treatment prior to

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AN INVESTIGATION OF PRESSURE ATMOSPHERIC AND BACTERIAL OXIDATION PROCESSES

refractory gold ore was beneficiated by bench scale flotation to produce a bulk sulphide concentrate containing 10 11 g/t Au 1314% S 11 12% Fe % C and % As Mineralogical analyses showed that the gold in the primary ore was primarily associated with pyrite and arsenian pyrite

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Improving gold recovery from a refractory ore via Na₂SO₄

Gold recovery from refractory gold ores with controlled roasting remained well below 80% Na2SO4 was added in an O 2 enriched single stage roasting of a refractory gold ore to improve its gold recovery Changes in physicochemical properties of the calcines suggested that this reduced the sintering as well as facilitated the formation of pores and a water soluble phase within the calcine

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IOP Conference Series Earth and Environmental Science PAPER

processing ore raw materials E A Gorbatova E A Emelianenko and M V Zaretckii Coal oil gold agglomeration assisted flotation to recover gold from refractory ore A Otsuki and C Yue Beneficiation and leaching study of a muti Au carrier and low grade refractory gold ore W J Li Y S Song Y Chen et al This content was downloaded from IP address on 08/04/2021 at 03 22 1 Content

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Non ferrous metallurgical processing Lhoist Minerals

Refractory gold ore generally contains iron sulfide typically pyrite FeS 2 which needs to be oxidized and removed prior to cyanidation All the various oxidation methods generate acid requiring significant levels of lime consumption for acid neutralization impurity precipitation and

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Rcovery of gold in pyritic ores Mine

Low grade ores that do not respond well to cyanide or flotation are generally referred to a refractory ore Which usually means that it needs to be roasted to release the gold Roasting has to be one of the most expensive methods of recovering gold with current environmental considerations and is usually cost prohibitive except in a few circumstances where grade and volume justify the

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Processing of refractory gold sulphide carbonbearing ores

Based upon experimental findings process scheme for combined oxidative preparation of sulphide carbon bearing ore with dispersive deportment of gold was developed In connection with the depletion of mineral resources base of gold the engagement of refractory ores reserves in the processing becomes a necessary condition to stabilize gold market Standard methods of processing of refractory

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Extraction of gold from an Indian low grade refractory

The work carried out on the processing of a low grade and refractory gold ore using thiourea is presented Direct leaching of the as received ore with thiourea has yielded only 16% gold extraction Starting with ore containing 14 g/t of gold it has been possible to generate a sulphide concentrate with g/t of gold by physical beneficiation of the ore through froth flotation

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Technology to enhance gold recovery for double refractory

Tech to enhance gold recovery for double refractory ore processing GUIYANG CITY A new technology to improve gold recovery in the processing of double refractory

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Substantiation of the effective geotechnological

The difficulties associated with the hydrometallurgical processing of refractory ores and some methods of their solution are discussed in the article Difficulties associated with leaching of goldcopper ores are characterized Gold and copper content is ppm and % respectively in the primary ores of the Malmyzh deposit The ore is characterized as low grade

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Technology to enhance gold recovery for double refractory

Tech to enhance gold recovery for double refractory ore processing GUIYANG CITY A new technology to improve gold recovery in the processing of double refractory ores which

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New techniques in the characterisation of complex gold ores

Three main ores have been investigated including the Kitchener ore as an example of an atypical complex quartz carbonate ore the North Shaw ore as an example of a typical complex refractory sulphide ore and the Mickey s Find oxide ore to demonstrate the applicability of methods described to non complex free milling ores

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Beneficiation of refractory Au ore from Karnataka

A refractory gold ore sample from Mines Chitradurga District Karnataka was collected for evolving an exploratory flow sheet which is viable and adaptable in the erstwhile 500 tpd carbon in pulp plant of CGU HGML It was reported by HGML that the reserves were about million tons and gold recoveries in CGU carbon in pulp plant were 40% only The review of literature [2 17] on

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Process for Recovering Gold McGill University

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 gold bearing raw materials can be low On the other hand

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Refractory Manufacturing

Refractory Manufacturing Process Description1 2 Refractories are materials that provide linings for high temperature furnaces and other processing units Refractories must be able to withstand physical wear high temperatures above 538°C [1000°F] and corrosion by chemical agents There are two general classifications of

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Extraction of gold from an Indian low grade refractory

The work carried out on the processing of a low grade and refractory gold ore using thiourea is presented Direct leaching of the as received ore with thiourea has yielded only 16% gold extraction Starting with ore containing g/t of gold it has been possible to generate a sulphide concentrate with g/t of gold by physical beneficiation of the ore through froth flotation

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Advances in Gold Ore Processing Volume 15 1st Edition

Refractory Ores Refractory sulphide ores D Lunt N Briggs Preg robbing gold ores J Miller R Y Wan X Díaz Treatment of gold telluride ores S Ellis Treatment of antimonial gold ores M Millard Summary of gold plants and processes M Adams Description The gold processing industry is experiencing change As free milling and oxide ores become depleted more complex

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