Alkaline Pre-oxidation for Refractory Gold Arsenosulfide ...

A new hydrometallurgical pre-oxidation process for the refractory gold arsenosulfide concentrates under normal temperature and pressure was presented. It comprised fine grinding, intensified agitation alkali-leaching, cyanidation and adsorption. In a stirring-type pulverizing-leaching tower mill, the concentrate was ground to 37μm of 98 %, then the intensified alkaline leaching for 24 h by ...

Get Price

孟宇群 - 中国科学院金属研究所 - 沈阳先进材料研究发展中心 ...

Yuqun Meng. Pretreatment and thiosulfate leaching of refractory gold-bearing arsenosulfide concentrates[J]. Journal of University of Science and Technology Beijing, 2005, 12 (5): 385-389. MENG Yu-qun. A new extraction process of carbonaceous refractory gold

Get Price

Refractory Gold Technology

2020-1-20  Sherritt had also provided extensive process development services to Homestake Mining Company, leading to the first commercial application of pressure oxidation for refractory gold ore treatment, at the McLaughlin Gold Complex in California, commissioned in 1985. Refractory Gold

Get Price

Refractory Gold Ore Treatment Methods

2016-7-14  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

Get Price

(PDF) Enriching gold from refractory gold concentrate by ...

PDF A new technology composed of two main processes, namely, enriching gold by reducing sulfur-retention smelting and electrolysis to separate lead... Find, read and cite all the research you ...

Get Price

Extraction of Gold from a Low‐Grade Double Refractory

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 ...

Get Price

Treatment of refractory gold: more sustainable gold

2020-8-19  Metso Outotec, a frontrunner in minerals and metals processing, has recently launched the Outotec MesoTHERM BIOX ® process for the treatment of refractory gold

Get Price

Treatment of Refractory Gold Ores SpringerLink

Rose and Newman’s very comprehensive book, The Metallurgy of Gold, does not even contain the term refractory in its latest, fourth edition (1937). 1 Dorr and Bosqui’s Cyanidation and Concentration of Gold and Silver (2d edition, 1950) has a brief chapter (XIII) on “Cyanicides and Refractory Ores,” with only four pages devoted to ...

Get Price

Gold Extraction Recovery Processes

2016-2-29  If the project is an entirely new mine operation, the process is critical. If the project is a plant expansion, the existing operation has an impact on the design factors. ... For gold extraction the strength of cyanide solution ranges from 0.01 to 0.05%. Lime is added to the process

Get Price

Alkaline Pre-oxidation for Refractory Gold Arsenosulfide ...

A new hydrometallurgical pre-oxidation process for the refractory gold arsenosulfide concentrates under normal temperature and pressure was presented. It comprised fine grinding, intensified agitation alkali-leaching, cyanidation and adsorption. In a stirring-type pulverizing-leaching tower mill, the concentrate was ground to 37μm of 98 %, then the intensified alkaline leaching for 24 h by ...

Get Price

孟宇群 - 中国科学院金属研究所 - 沈阳先进材料研究发展中心 ...

Yuqun Meng. Pretreatment and thiosulfate leaching of refractory gold-bearing arsenosulfide concentrates[J]. Journal of University of Science and Technology Beijing, 2005, 12 (5): 385-389. MENG Yu-qun. A new extraction process of carbonaceous refractory gold

Get Price

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

Get Price

New Chloride Leaching Process for Gold Extraction from ...

2017-8-28  2017-8-28  New Chloride Leaching Process for Gold Extraction from Refractory Ores WS Rapson REFERENCES attainment of higher leaching temperatures and higher efficiencies possible. Decomposition ofthe refractory sulfides and arsenides occurs in the chloride leach solutions and their gold content made susceptible to cyanide leaching.

Get Price

人才库----中国科学院金属研究所 - CAS

A new extraction process of carbonaceous refractory gold concentrate [J]. Transactions of Nonferrous Metals Society of China, 2005, 15 (5): 1178-1184. 3. Yuqun Meng, Tao Jin, Minjie Wu, Longbao Wang. A new extraction process of refractory gold [J].

Get Price

Refractory Gold Technology

2020-1-20  Sherritt had also provided extensive process development services to Homestake Mining Company, leading to the first commercial application of pressure oxidation for refractory gold ore treatment, at the McLaughlin Gold Complex in California, commissioned in 1985. Refractory Gold

Get Price

(PDF) Enriching gold from refractory gold concentrate by ...

PDF A new technology composed of two main processes, namely, enriching gold by reducing sulfur-retention smelting and electrolysis to separate lead... Find, read and cite all the research you ...

Get Price

Extraction of Gold from a Low‐Grade Double Refractory

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 ...

Get Price

Refractory Gold Ore Treatment Methods

2016-7-14  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

Get Price

Treatment of refractory gold: more sustainable gold

2020-8-19  2020-8-19  Metso Outotec, a frontrunner in minerals and metals processing, has recently launched the Outotec MesoTHERM BIOX ® process for the treatment of refractory gold. This innovative solution for the ...

Get Price

OXIDATION OF REFRACTORY GOLD CONCENTRATES

2010-12-21  complex reactions of gold with thiosulfate ions promoted by the catalytic effect of copper ions. Up to 80% of the gold may be extracted during the oxidation of selected refractory arsenical gold concentrates, which suggests a possible one-step process for the extraction of gold.

Get Price

Bioenhanced Gold Extraction from Refractory Ores ...

2013-7-18  The continuing depletion of high grade oxide gold deposits has created a need for new, economically viable and environmentally safe methods to treat refractory sulphidic ores. One of the alternative leaching processes uses micro-organisms, Thiobacillus ferro-oxidans , partially to oxidise pyrite and/or arsenopyrite containing finely ...

Get Price

refractory gold Archives - International Mining

2021-8-27  “The new plant will enable Petropavlovsk to take full advantage of Pioneer’s substantial refractory ore reserves while providing an additional source of own-mined concentrate for our state-of-the-art Pressure Oxidation (POX) Hub.” The new Pioneer flotation plant has the capacity to process 3.6 Mt/y of refractory gold ore.

Get Price

Treatment of refractory gold: more sustainable gold

2020-8-19  Metso Outotec, a frontrunner in minerals and metals processing, has recently launched the Outotec MesoTHERM BIOX ® process for the treatment of refractory gold. This innovative solution for the ...

Get Price

Improvement of Gold Leaching from a Refractory Gold ...

A total gold extraction of 70.2% could only be reached via direct cyanidation from a refractory As-, S- and C-bearing gold concentrate calcine, and the gold extraction varied noticeably with different size fractions. The reasons for unsatisfactory gold extraction

Get Price

A review of gold extraction using noncyanide lixiviants ...

Alkaline sulfur-containing lixiviants, including thiosulfate, polysulfides, and alkaline sulfide solutions, stand out as a promising class of alternatives to cyanide because of their low toxicity, high efficiency, and strong adaptability. In this paper, we summarized the research progress and remaining challenges in gold extraction using these noncyanide reagents.

Get Price

(PDF) Gold Extraction and Recovery Processes For Internal ...

6 M3TC Report GOLD EXTRACTION AND RECOVERY PROCESSES Cyanide Process It is the most common used process for gold extraction. This process involves the dissolution of gold (and of any silver present in soluble form) from the ground ore in a dilute cyanide solution (usually NaCN or KCN) in the presence of lime and oxygen according to the ...

Get Price

Gold Processing Methods Gold Ore Extraction

2015-9-15  Gold Processing Methods Gold Ore Extraction. Of all the methods of extracting gold processing it from its ore, I used a few to evaluate two principal flowsheets in this case study. The flowsheets utilized operations that involved flotation,

Get Price

Recovery of gold from refractory auriferous iron ...

A process for recovering gold from refractory auriferous iron containing sulphidic material which comprises treating an aqueous slurry of the material in a pressure oxidation step at a temperature in the range of from about 135° to about 250° C. under a total pressure of from about 500 to about 5000 kPa to oxidize sulphide sulphur to sulphate form and release gold from a refractory state.

Get Price