refractory gold ores treatment

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  • US4559209A Leaching refractory gold ores Google Patents

    A method is disclosed for leaching a gold ore which is refractory due to the presence of sulphide minerals of arsenic and antimony. The ground ore is leached with cyanide in a pipe reactor at a pressure of between 5 and 8 MPa. The terminal pH value of the pulp is controlled to be 10 or less than 10.

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  • ALTA Gold 2012 E Doc albionprocess

    Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide leaching circuits, even when the ore is finely ground. The cause of low gold recoveries can be either

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  • Pretreatment Process on Refractory Gold Ores with As

    Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding. 1) Arsenic bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice.

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  • US20090158893A1 Microbial pre treatment of double

    Guay, The Treatment of Refractory Gold Ores Containing Carbonaceous Material and Sulfides, Society of Mining Engineers of AIME, 81 34, pp. 1 4, 1981). An additional problem in recovering gold from highly carbonaceous ores is that a significant quantity of the gold may have been adsorbed onto carbon during formation of the mineral deposit.

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  • Ultra Fine Grinding A Practical Alternative to Oxidative

    Ultra Fine Grinding A Practical Alternative to Oxidative Treatment of Refractory Gold Ores S. Ellis Kalgoorlie Consolidated Gold Mines Kalgoorlie, WA.

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  • MICROBIAL PRE TREATMENT OF DOUBLE REFRACTORY

    In this study, microbial pre treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white rot fungus,

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  • Recovery Refractory Resources sgs

    extremely fine gold particles by a host mineral that is impervious to the cyanide leach solution. As a result, refractory ores require physical or chemical pre treatment for adequate gold recovery to be achieved through traditional cyanidation and carbon adsorption processes. Pyrite and arsenopyrite are the most common host minerals in refractory gold deposits.

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  • Ultra Fine Grinding A Practical Alternative to Oxidative

    Ultra Fine Grinding A Practical Alternative to Oxidative Treatment of Refractory Gold Ores S. Ellis Kalgoorlie Consolidated Gold Mines Kalgoorlie, WA.

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  • refractory gold ore dublinvacationrentals

    Treatment of Refractory Gold Ores XPS. 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 NIGEL BRIGGS DAVID LUNT AND AN ITCHIE .

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  • Chemical Used in Gold Mining quot;Refractory Gold orequot; Kemcore

    Refractory gold ores and concentrates are characterized by low gold recoveries and high cyanide consumptions when subjected to direct cyanide leaching. Therefore an oxidation pre treatment step is required before cyanidation that will break up the sulphide lattice and render gold

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  • Supercritical Water Treatment of Refractory Gold Ores

    Supercritical water alters the structure of common sulfide minerals by partially removing sulfur from the mineral structure. This discovery has been applied to the treatment of pyritic gold ores to improve precious metal recovery without generating or utilizing environmentally sensitive products such as SO2, chlorine, or cyanide.

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  • Treatment of Refractory Gold Ores XPS

    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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  • Refractory Ores

    During the period from 1994 to 2009 the percentage of world gold production from refractory gold ores increased from 5% to over 10%. Examples of Refractory Ore treatment include Pressure oxidation of flotation concentrates. Pressure oxidation of whole ore. Tank bio oxidation of flotation concentrates.

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  • Leachox Refractory and Sulphide Gold Process Maelgwyn

    The gold is normally present in refractory gold sulphide ores containing mainly pyrite, arsenopyrite or pyrrhotite and occurs in both the chemically bonded state and as micro or nano size grains of metallic gold.

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  • Pre treatment of a refractory gold sulfide ore by means of

    Biological oxidation (biooxidation) as pre treatment of refractory gold ores is based on the ability of acidophilic microorganisms to oxidize and dissolve pyrite and arsenopyrite, thus releasing the entrapped gold particles (Longhans et al., 1995; Komnitsas and Pooley, 1989).

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  • Process for treating refractory gold ores by roasting

    Process for treating refractory gold ores by roasting under oxidizing conditions. Minerals and Metallurgical Processing, 17(1), 1 6.

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  • Treatment of carbonaceous refractory gold ores ResearchGate

    Refractory ores, on the other hand, are difficult to treat and require pre cyanidation processes to liberate the gold. Underlying the difficulty of processing refractory gold ores is their mineralogy.

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  • refractory gold ore extraction by using vacuum oven

    Aug 04, 20160183;32;refractory gold ore extraction by using vacuum oven offers 1737 ceramic fiber spun blanket products. About 95% of these are ceramic fiber blankets, 1% are other heat insulation materials, and 1% are blanket.

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  • Treatment of Refractory Gold Ores Home Springer

    CHAPTER 5 Treatment of Refractory Gold Ores Problem ores that yield low (say less than 80%) gold recovery by cyanida173; tion when quot;normally groundquot; are defined as refractory.The term, as well as

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  • early developments in treating pyritic gold ores

    Jul 12, 20180183;32;Supercritical Water Treatment of Refractory Gold Ores. Nov 6, 2017 This discovery has been applied to the treatment of pyritic gold ores to improve Supercritical water, however, exhibits even greater changes from the . Early tests were conducted to assure that heating in supercritical water.

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  • Ozone Science amp; Engineering Pretreatment with Ozone for

    Gold and Silver Recovery from Refractory Ores with Ozone MarchApril 2007 101 Downloaded By [Smith, Dj] At 0619 4 August 2010 directly into the mineral slurry.

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  • Treatment of Refractory Gold Ores SpringerLink

    Abstract. Problem ores that yield low (say less than 80%) gold recovery by cyanidation when normally ground are defined as refractory.The term, as well as the technical methods used to treat such ores, are relatively new.

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  • Review Pretreatment Process on Refractory Gold Ores with As

    of refractory gold. Statistics show that, in the world, about 2/3 gold resource belongs to the difficult processing ores, and about 1/3 total output of world gold is produced from refractory gold. This proportion will further increase in future. Therefore, pre treatment of arsenic bearing refractory gold has an extreme ly important significance.

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  • Refractory Gold Mining SGS

    First, the gold recovery to the concentrate should be sufficiently high that the tailings can be discarded without further treatment, and the mass ratio of concentrate to tailings should be low. SGS has extensive experience with environmentally sustainable refractory gold extraction.

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  • cost of a gold ore treatment cyanidation cip plant

    Jul 12, 20180183;32;Refractory gold ore pretreatment processes continue to receive much paper compares the relative economics of treating ores by oxygen pressure total ore cyanidation, were that the plant would be sited in central Nevada, power would be costs for the crushing, grinding, flotation, leaching and CIP circuits were.

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  • US4919715A Treating refractory gold ores via oxygen

    Gold containing ores, having refractory sulfidic matter or a combination of refractory sulfidic matter and refractory carbonaceous matter, are processed to recover their gold values. The process uses an ore roasting procedure that utilizes a two state, fluidized bed roaster. The process also employs a pure oxygen atmosphere during roasting.

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  • Developments in the pretreatment of refractory gold

    Such ores require a pre treatment process to alter or destroy the sulphide matrix and render the gold accessible to cyanide and oxygen (Gudyanga et al., 1999). The gold in high sulphur and high processing refractory gold ores, especially development in the pretreatment of refractory gold minerals by nitric acid. These processes include the

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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. This the treatment steps were estimated separately for each size and

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  • Refractory Gold Ore Treatment Methods

    Metallurgical ContentGold Leaching amp; 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

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  • Gold Mining Process Development Denver Mineral Engineers

    REFRACTORY ORE PROCESSING. The common definition of refractory gold ores, are those ores that do not allow the recovery of gold by standard gravity concentration or direct cyanide leaching. One major category of refractory ores are gold values contained within the crystalline structure of sulfide minerals such as pyrite and arsenopyrite.

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  • refractory gold, gold leaching, complex gold ore leaching

    The Eco Goldex C Series (a special auxiliary agent for complex gold ore pre treatment before apply the O series in is formulated for complex gold ores (gold ores with complex mineralogy and high contents of harmful elements such as As, Sb, Pb, Cu, and gold ores with sulfide contents over 5%).

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  • Gold extraction

    A quot;refractoryquot; 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 carbon, or both.

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  • Treatment of carbonaceous refractory gold ores ResearchGate

    Gold ores can be categorized into two types free milling and refractory. Free milling ores are those easy to process by simple gravity techniques or direct cyanidation. Refractory ores, on the

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  • US4919715A Treating refractory gold ores via oxygen

    Gold containing ores, having refractory sulfidic matter or a combination of refractory sulfidic matter and refractory carbonaceous matter, are processed to recover their gold values. The process uses an ore roasting procedure that utilizes a two state, fluidized bed roaster.

    Get Price >>
  • Carbon in chlorine Treatment of Refractory Gold Ores.

    Chlorination in the treatment of refractory gold ores is applicable in many low grade gold operations. When usable, this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon. Chlorination, however, is a pretreatment technique that requires the neutralization of the

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  • John T. Boyd Company Refractory Ore Specialist

    Refractory Ores. It is well known throughout the mining industry that direct leaching gold deposits are becoming far less common and that the percentage of gold produced from refractory ore deposits will continue to increase for the foreseeable future.

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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 Refractory gold ores present a number of problems to the gold producer. Much has the treatment steps were estimated separately for

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  • Treatment of carbonaceous refractory gold ores ScienceDirect

    Gold ores can be categorized into two types free milling and refractory. Free milling ores are those easy to process by simple gravity techniques or direct cyanidation. Refractory ores, on the other hand, are difficult to treat and require pre cyanidation processes to liberate the gold.

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