Microwave Pretreatment Of A Double Refractory Gold Ore

  • Microwave pretreatment of a double refractory gold ore

      In this paper, microwave pretreatment of a double refractory gold ore was investigated as an alternative method and the results are compared to conventional roasting 3 Experimental31 Ore sampleA lowgrade sample of a double refractory gold ore was obtained from Barrick Gold StrikeOne possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon In this research, microwave roasting of a double refractory gold ore was investigated as an alternative method and the results were compared to those obtained by conventional roasting The compositional changes of the ore during roasting were determined by thermogravimetric analysis (TGA)Microwave pretreatment of a double refractory gold ore Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leachingMicrowave pretreatment of a double refractory gold ore

  • Microwave pretreatment of a double refractory gold ore

    Abstract Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon In this research, microwave roasting of a double refractory gold ore was investigated as an   In this study, microbial pretreatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a whiterot fungus, Tramestes versicolor (ATTC 20869) Pulp density, temperature, pH and retention times were the process variables consideredMICROBIAL PRETREATMENT OF DOUBLE REFRACTORY   Because pyrite and arsenopyrite can be decomposed by microwave energy, then pretreatment of a typical refractory gold ore or concentrate with microwave energy is a possible option As microwave energy decomposes these refractory minerals, gold would be released from this mineral matrix along with arsenic and sulphur Thus freed gold would be extractable by conventional alkaline cyanidation To this end, a typical arsenopyritic gold concentrate was irradiated with microwaves, as a pretreatment MICROWAVE IRRADIATION PRETREATMENT OF A

  • Microwave roasting of a carbonaceous sulphidic gold

      Nanthakumar et al (2007) utilized microwaves in the pretreatment of a double refractory gold ore containing 156% sulphur and 596% total carbon The microwave response of this ore was poor and therefore it was indirectly heated by microwaves, using magnetite as a susceptor  Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cellfree spent medium (CFSM) from whiterot fungus Phanerochaete chrysosporiumThe pretreatment by A brierleyi significantly improved the gold recovery from 25% to 77% Additionally, the crude lignindegrading Sequential pretreatment of double refractory gold ore After roasting, microwave heating or alkaline pressure oxidation, the gold cyanidation ratio reached 8237%, 8126% and 7109% respectively Roasting was an effective, reliable and mature technique to oxidize sulfide minerals and carbonaceous matters “Microwave pretreatment of a double refractory gold ore,” Minerals Engineering, 20 (11 Extraction of Gold from a LowGrade Double Refractory

  • 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   Study on Pretreatment of Refractory Gold Ore by Microwave Roasting Method WEI Li1, QU Zhanlong1, PIAO Huijing2 (1 College of Materials Science and Engineering, Shenyang Ligong University, Shenyang, Liaoning , China; 2微波焙烧预处理难浸金矿物百度文库 Baidu  In this study, microbial pretreatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a whiterot fungus, Tramestes versicolor (ATTC 20869) Pulp density, temperature, pH and retention times were the process variables consideredMICROBIAL PRETREATMENT OF DOUBLE REFRACTORY

  • Microwave roasting of a carbonaceous sulphidic gold

      Nanthakumar et al (2007) utilized microwaves in the pretreatment of a double refractory gold ore containing 156% sulphur and 596% total carbon The microwave response of this ore was poor and therefore it was indirectly heated by microwaves, using magnetite as a susceptorrefractory gold ore8,9) Haque K E used microwave to dispose of arsenical pyrite and gold concentrate with pyrite, the gold leaching rate reached 98%10) Liu Quanjun etc made a test for a gold mine in Guizhou province The ore without microwave pretreatment could be hardly leached in cyanide On the other hand the cyanide leaching of gold oreReview Pretreatment Process on Refractory Gold Ores microwave pretreatment of a refractory gold Know More refractory gold ore milling in oregon atithipalacein, microwave pretreatment of a double refracto Inquire Now; Pretreatment of a refractory gold sulfide ore by means Latin American applied research as pretreatment of refractory gold ores is based on the ability of acidophilic refractory gold pretreatmentbing

  • Pretreatments Applied to Refractory Gold Ores Request

    Doublelayered pellet (DLP) roasting is a novel pretreatment method for sulfur and arsenicbearing gold concentrates In this process, preparation of DLPs is a fundamental step which is required Request PDF Experimental Study on Microwave Pretreatment with some Refractory Flotation Gold Concentrate The microwave pretreatment of a typically refractory flotation gold concentrate was Experimental Study on Microwave Pretreatment with some   The present paper attempts to assess the effects of microwave irradiation on the leachability of refractory gold ores Characteristics of the crystal structure and microstructure of the ores were determined by xray structural analysis (XRD) and scanning electron microscopy (SEM) before and after microwave irradiation Compared to conventional processes, microwave leaching processes are Leaching of Refractory Gold Ores by Microwave Irradiation

  • Optimizing the alkaline oxidation pretreatment of a

      This study investigates the alkaline oxidation pretreatment process of Zarshuran refractory gold ore Taguchi methodorthogonal array design (OAD) is applied to evaluate and optimize the influence of five main factors including solution pH, aeration rate,   Carbonaceous sulfidic gold ores are commonly double refractory and thus require pretreatment before gold extraction In this paper, the capacity of prebiooxidation can simultaneously decompose sulfides or deactivate carbonaceous matters (CM) from BioOxidation of a Double Refractory Gold Ore and Do not surround your terms in doublequotes ("") in this field With at least one of the words: Find any of these words, separated by spaces Without the words: Exclude each of these words, separated by spaces With words in the article title: for these terms only in the title of an article DeepDyve Unlimited Access to PeerReviewed Journals

  • Experimental Study on Microwave Pretreatment with some

    Request PDF Experimental Study on Microwave Pretreatment with some Refractory Flotation Gold Concentrate The microwave pretreatment of a typically refractory flotation gold concentrate was   A twostage bacterial pretreatment process for double refractory gold ores RK Amankwah a,*, WT Yen a, JA Ramsay b a Mining Engineering Department, Queen’s University, Kingston, Ontario, Canada K7L 3N6 b Chemical Engineering Department, Queen’s University, Kingston, Ontario, Canada K7L 3N6 Received 7 April 2004; accepted 11 May 2004 Abstract Double refractory gold A twostage bacterial pretreatment process for double USA1 US12/277,046 USA USA1 US A1 US A1 US A1 US A US A US A US A1 US A1 US A1 Authority US United States Prior art keywords feed gold carbon fungal agent component Prior art date Legal status (The legal status is USA1 Microbial pretreatment of double

  • Increasing leaching rate of gold cyanide of twostage

      Nanthakumar B, Pickles CA, Kelebek S Microwave pretreatment of a double refractory gold ore Miner Eng 2007;20(11):1109 Article Google Scholar [5] Gudyanga FP, Mahlangu T, Roman RJ, Mungoshi J, Mbeve K An acidic pressure oxidation pretreatment of refractory gold concentrates from the KweKwe Roasting Plant1 Introduction Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding 1) Arsenicbearing 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 latticePretreatment Process on Refractory Gold Ores with AsThe effect of ultrasonic energy on the pretreatment and leaching of gold from the refractory ore was investigated Firstly, the refractory ore was pretreated with sodium hydroxide under ultrasoundUltrasoundintensified Leaching of Gold from a Refractory

  • Optimizing the alkaline oxidation pretreatment of a

      This study investigates the alkaline oxidation pretreatment process of Zarshuran refractory gold ore Taguchi methodorthogonal array design (OAD) is applied to evaluate and optimize the influence of five main factors including solution pH, aeration rate, The grade and recovery of gold in the flotation concentrates were 4944 g/t and 3336%, respectively The total recovery of gold was 9094% The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of goldMineralogy and Pretreatment of a Refractory Gold Deposit Hence, this refractory gold ore in its processing requires pretreatment methods before cyanidation Some conventional pretreatment methods such as the preaeration method by chlorination, roasting, pressure oxidation, ultrafine grinding, and flotationintensive leaching are proven to be less suitable to process refractorytype gold ores PAPER OPEN ACCESS Biooxidation pretreatment of low

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