Home--->double refractory gold ore

  • Double-Refractory Carbonaceous Sulfidic Gold Ores

    2016-1-1 · Ores where gold is associated with sulfides and with high carbonaceous matter content are considered double refractory. Ores in the Carlin Trend District are characterized by the presence of submicroscopic gold (invisible gold) finely disseminated within a

    Sequential pretreatment of double refractory gold ore

    2019-7-1 · Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM) from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%.

    Sequential pretreatment of double refractory gold ore

    Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM) from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%. Additionally, the crude lignin-degrading

    Microwave pretreatment of a double refractory gold

    2007-9-1 · 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.

    Double-Refractory Carbonaceous Sulfidic Gold Ores

    Ores where gold is associated with sulfides and with high carbonaceous matter content are considered double refractory. Ores in the Carlin Trend District are characterized by the presence of...

    Microbial pre-treatment of double refractory gold

    A double refractory gold ore usually contains both sulfide minerals and carbonaceous matter and results in very low gold extraction. The micro-sized gold particles are enclosed inside the mineral...

    Study on the Gold Recovery of Double Refractory

    Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment. Article Preview. Abstract: In this paper, Bacterial oxidation-cyanide leaching experiments were carried out and the carbonaceous substances composition of carbonaceous gold concentrate was been studied. The elemental composition was 9.73 %

    Extraction of Gold from a Low-Grade Double

    Yang Y., Liu S., Xu B., Li Q., Jiang T., Lv P. (2015) Extraction of Gold from a Low-Grade Double Refractory Gold Ore Using Flotation-Preoxidation-Leaching Process. In: Neelameggham N.R., Alam S., Oosterhof H., Jha A., Dreisinger D., Wang S. (eds) Rare Metal Technology 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48188-3_7

    Refractory Gold Ore Treatment Methods

    2016-7-14 · At the plant of the Consolidated Murchison Co. in the Transvaal, South Africa, where a refractory high-antimony gold ore is being treated, flotation and cyanidation of the flotation concentrates and tailings are being practiced. The association of the antimony and gold is very intimate, and during 1946, while the antimony recovery amounted to 70.6 per cent, only 62.7 per cent of the contained gold

    (PDF) Cyanidation of Refractory Gold Ores: A Review

    1 The resistance of gold to the leaching process is categorized into 4 groups based on its refractoriness degree; Free milling ores, mildly refractory ores, moderately refractory ores,

    Microwave pretreatment of a double refractory gold

    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

    Study on the Gold Recovery of Double Refractory

    Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment. Article Preview. Abstract: In this paper, Bacterial oxidation-cyanide leaching experiments were carried out and the carbonaceous substances composition of carbonaceous gold concentrate was been studied. The elemental composition was 9.73 %

    Barrick Thiosulfate Leaching of Double Refractory Ore

    2019-6-26 · Double refractory ores present a unique challenge to the traditional method of gold recovery in mining. Double refractory ores are ores that contain sulfides and carbons, as opposed to single refractory ores which contain only sulfides. In general, the cyanide solution pulls the gold out of the ore and into solution.

    Extraction of Gold from a Low‐Grade Double

    2015-2-16 · 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.

    MICROBIAL PRE-TREATMENT OF DOUBLE

    The invention relates generally to hydrometallurgical gold recovery processes and particularly to biological processes for recovering gold from refractory and double refractory materials. BACKGROUND In carbonaceous gold bearing ores, preg robbing occurs when active carbon, indigenous to the ore, complexes with the gold dissolved in cyanide

    Biooxidation of a double-refractory gold-bearing

    2015-9-22 · The efficiency of biooxidation for treatment of a double-refractory gold-bearing sulfide ore concentrate from the Bakyrchik deposit (East Kazakhstan) was defined. The experiments were conducted in two different modes, i.e., with the standard liquid medium and the medium imitating the chemical composition of the Bakyrchik deposit groundwater and containing high concentrations of sodium

    ALTA MetBytes What's Happening in Gold Ore Processing

    2020-1-15 · double refractory ore has been achieved at Nordgold’s Suzdal mine in Kazakhstan which treats double refractory ore with both visible and invisible gold hosted in sulphide associations of pyrite and arsenopyrite and also,carbonaceous black shale. Following extensive laboratory and demonstration scale testing of the Outotec

    Establishing thE ProcEss MinEralogy of gold orEs

    2015-12-16 · A notable example of such a double-refractory carbonaceous sulfide ore is at Barrick’s Goldstrike Mine where gold occurs in pyrite in refractory sulfide ore and double-refractory sulfidic/ carbonaceous ore. These ores are pretreated by autoclave and roaster prior to cyanide leaching (Thomas et al., 2000; Wickens et al., 2003). In the Jinya

    Refractory ore trouble Russian gold miners Mining

    2016-9-28 · Refractory ore trouble Russian gold miners . Nowhere is this problem of complex ore more prevalent than in Russia, where approximately 80% of gold reserves are refractory or partly so, according to figures from Petropavlovsk PLC.

    杨洪英 东北大学

    2019-1-18 · (22) Study on the Gold Recovery of Double Refractory Gold Ore Concentrate by Biological Oxidation Pretreatment, Advanced Materials Research Vol. 1130 (2015): 379-381. ( EI 收录) (23) Electrochemical Research on N-Type and P-Type Semiconductor;

    Microwave pretreatment of a double refractory gold

    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

    Biotechnological Approaches to Facilitate Gold

    2020-10-30 · Double refractory gold ore (DRGO) not only include ppt levels of gold grains locked in sulfide minerals but also a problematic amount of carbonaceous matter. This causes a significant recovery loss of gold during cyanidation because of the strong affinity of the Au(CN)2 − with the carbonaceous matter. Combustion decreases the carbonaceous matter content, but also emits

    MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

    2020-3-24 · In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.

    Transformation of the carbonaceous matter in double

    Sulfides and carbonaceous matter in double refractory gold ore (DRGO) were bio-treated sequentially using an iron-oxidizing archaeon Acidianus brierleyi followed by lignin peroxidase-dominating crude enzymes released from the white-rot fungus Phanerochaete chrysosporium to significantly improve gold recovery from 24% to 92%.

    MICROBIAL PRE-TREATMENT OF DOUBLE

    The invention relates generally to hydrometallurgical gold recovery processes and particularly to biological processes for recovering gold from refractory and double refractory materials. BACKGROUND In carbonaceous gold bearing ores, preg robbing occurs when active carbon, indigenous to the ore, complexes with the gold dissolved in cyanide

    Amursk POX-2 Polymetal

    The key to double refractory ore. Double refractory ore concentrate contain ore micron gold particles encapsulated in sulfides (pyrites and arsenic pyrites) together with high concentrations of organic carbon, that is why conventional methods such as cyanidation or heap leach gives very low recoveries.

    Complex Orebodies Conference 2018

    2021-5-9 · carbonaceous refractory gold ore (double refractory). This was a very disappointing finding but useful in that large amounts of money were not spent drilling a problematic gold ore. A small scale gravity and flotation test programme was developed to produce a concentrate with the majority of the gold.

    ALTA MetBytes What's Happening in Gold Ore Processing

    2020-1-15 · double refractory ore has been achieved at Nordgold’s Suzdal mine in Kazakhstan which treats double refractory ore with both visible and invisible gold hosted in sulphide associations of pyrite and arsenopyrite and also,carbonaceous black shale. Following extensive laboratory and demonstration scale testing of the Outotec

    ALTA Gold 2012 E-Doc Albion Process

    2017-12-21 · 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 through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked’ in sulphide

    refractory gold ore Chinese translation Linguee

    Many translated example sentences containing "refractory gold ore" Chinese-English dictionary and search engine for Chinese translations. 在这方面,他处理过不同类型的商业、金融和工业谈判、项目筹资、公营企业重组与私有化、国际仲裁、基础设施 建设的

    METHOD TO IMPROVE RECOVERY OF GOLD FROM

    A gold bearing sulfide ore is ground to P 80 less than 70 microns. The ore was pre-acidified to remove the carbonate components prior to acid Pressure Oxidation (POX), at 225° C. with oxygen over pressure of 100 psi, a pulp density of 30% and a residence time of 1 hour.

    ALTA MetBytes What's Happening in Gold Ore Processing

    2020-1-15 · double refractory ore has been achieved at Nordgold’s Suzdal mine in Kazakhstan which treats double refractory ore with both visible and invisible gold hosted in sulphide associations of pyrite and arsenopyrite and also,carbonaceous black shale. Following extensive laboratory and demonstration scale testing of the Outotec

    Complex Orebodies Conference 2018

    2021-5-9 · carbonaceous refractory gold ore (double refractory). This was a very disappointing finding but useful in that large amounts of money were not spent drilling a problematic gold ore. A small scale gravity and flotation test programme was developed to produce a concentrate with the majority of the gold.

    Optimizing the alkaline oxidation pretreatment of a

    2018-9-28 · Nanthakumar B, Pickles C A and Kelebek S 2007 Microwave pretreatment of a double refractory gold ore Miner. Eng. 20 1109–19. Crossref Google Scholar. Li Q, Li D and Qian F 2009 Pre-oxidation of high-sulfur and high-arsenic refractory gold concentrate by ozone and ferric ions in acidic media Hydrometallurgy 97 61–6.

    Refractory ore chemistry Britannica

    2021-5-11 · Other articles where Refractory ore is discussed: gold processing: Extraction from refractory ores: Many gold-bearing ores and concentrates are not readily amenable to cyanidation, owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold, preferentially adsorb the gold as it dissolves (a phenomenon called preg-robbing), or completely surround the

    Recovery of gold from refractory gold ores: Effect of

    2020-7-12 · The extraction of gold from refractory gold ores (RGOs) without side reactions is an extremely promising endeavor. However, most RGOs contain large amounts of sulfide, such as pyrite. Thus, investigation of the influence of sulfide on the gold leaching process is important to maximize the utilization of RGOs. In this work, the effects of pyrite on the stability of the thiourea system were

    ALTA Gold 2012 E-Doc Albion Process

    2017-12-21 · 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 through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked’ in sulphide

    Gold processing 101 Mining Magazine

    2017-9-7 · In the case of Goldstrike, this was a double-refractory ore combining sulphide-occluded gold with preg-robbing carbonaceous material that rendered the ore unsuitable for conventional cyanide leaching and carbon adsorption.

    refractory gold ore Chinese translation Linguee

    gold through open pit mining and conventional treatment of o xide gold ore. mmg. mmg. 自投產以來,Sepon 金經營作業通過露天開採及氧 化金 礦 石 傳統 處 理法 經已產出超逾一 百 萬 盎司 金。. mmg. mmg. This all-refractory meta l source. [...]

    Gold-PM Conference

    2017-6-28 · More ore bodies have been found where the gold is not amenable to simple cyanidation alone. In the simplest of terms, these are refractory ores. The best choice of a processing route to treat a refractory ore will in most cases be site specific, due mainly to the metallurgical and mineralogical characteristics of the ore.

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