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of refractory gold ore with microwaves

of refractory gold ore with microwaves

Microwave pretreatment of a double refractory gold ore ...

Sep 01, 2007 · Thus, a double refractory gold ore containing quartz, dolomite, pyrite, and carbonaceous matter, would likely exhibit a complex interaction with the microwave radiation. The quartz and dolomite would not be good microwave absorbers while the pyrite and carbonaceous matter would exhibit the opposite effect ( Woodcock et al., 1988, Haque, 1987b ).

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Microwave Pretreatment of Refractory Gold Ores - CNKI

Abstract: The microwave pretreatment processes of refractory gold ores in solid and slurry, and effects of the microwave pretreatment on cyanide leaching are investigated The mechanism of microwave pretreatment is described The cyanide leaching recovery of Au in the sample A is up to 86 50%~89 19% with the solid microwave pretreatment, and the cyanide leaching

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Leaching of Refractory Gold Ores by Microwave Irradiation ...

高达12%返现 · Dec 10, 2013 · The experimental results show that the amount of gold extracted increases with microwave leaching temperature. The results demonstrate that microwave irradiation techniques can be applied effectively and efficiently to the leaching of refractory gold ores.

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Leaching of Refractory Gold Ores by Microwave Irradiation ...

The effects of microwave irradiation on the leachability of refractory gold ores have also been studied [28]. Compared to conventional processes, microwave leaching processes were found to

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Microwave pretreatment of a double refractory gold ore

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

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Microwave pretreatment of a double refractory gold ore ...

Sep 01, 2007 · 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

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Numerical modeling & microwave roasting of refractory gold ore

Numerical modeling & microwave roasting of refractory gold ore Abstract Microwave roasting of refractory ores is an attractive alternate to conventional thermal roasting. Temperature measurements and hence temperature control is a major problem which is obstructing the introduction of this new technology to mineral processing.

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(PDF) Recovery of Gold from the Refractory Gold ...

Apr 28, 2020 · Microwave-assisted leaching experiments for gold recovery were conducted for the refractory gold concentrate. More extreme reaction conditions (nitric acid concentration >1.0 M facilitated the...

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Review Pretreatment Process on Refractory Gold Ores with As

refractory gold ore.8,9) Haque K E used microwave to dis-pose 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 micro-wave pretreatment could be hardly leached in cya-nide. On the other hand the cyanide leaching of gold ore

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Refractory Gold Ore Treatment Methods

Jul 14, 2016 · The leachox Process is another recently developed hydrometallurgical approach to the treatment of refractory gold ores. The technology is owned and marketed by Maclgwyn Mineral Services (MMS) based in the United Kingdom.

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Microwave Pretreatment of Refractory Gold Ores - CNKI

Abstract: The microwave pretreatment processes of refractory gold ores in solid and slurry, and effects of the microwave pretreatment on cyanide leaching are investigated The mechanism of microwave pretreatment is described The cyanide leaching recovery of Au in the sample A is up to 86 50%~89 19% with the solid microwave pretreatment, and the cyanide leaching

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Microwave pretreatment of a double refractory gold ore ...

Sep 01, 2007 · 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

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Microwave pretreatment of a double refractory gold ore ...

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).

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Review Pretreatment Process on Refractory Gold Ores with As

refractory gold ore.8,9) Haque K E used microwave to dis-pose 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 micro-wave pretreatment could be hardly leached in cya-nide. On the other hand the cyanide leaching of gold ore

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Pretreatment Process on Refractory Gold Ores with As

Kyuesi and Haque, etc. have studied the role of microwave in the gold extraction process of arsenic-bearing refractory gold ore. 8,9) 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 ...

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Microwave roasting of a carbonaceous sulphidic gold ...

Oct 01, 2009 · Nanthakumar et al. (2007) utilized microwaves in the pretreatment of a double refractory gold ore containing 1.56% sulphur and 5.96% total carbon. The microwave response of this ore was poor and therefore it was indirectly heated by microwaves, using magnetite as a

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Removal of arsenic and sulfur from a refractory gold ...

Jan 01, 2010 · This implies that the cyanidation of primary refractory gold ores could be greatly improved with acceptable gold recovery provided that sulfur and arsenic are removed by microwave heating. Therefore, this study investigated the removal of sulfur and arsenic from a refractory flotation gold concentrate by microwave heating. 2. Experimental2.1.

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Refractory gold ores: Challenges and opportunities for a ...

Mar 23, 2021 · Gold miners are facing a reserves crisis, and what is left in the ground is becoming more and more challenging to process.Refractory gold reserves, which require more sophisticated treatment methods in order to achieve oxide-ore recovery rates, correspond to 24 percent of current gold reserves and 22 percent of gold resources worldwide (Exhibit 1).

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The Separation of Carbonaceous Matter from Refractory Gold ...

Nov 01, 2021 · As a pre-treatment method of refractory gold ore, carbonaceous matter (C-matter) flotation was investigated with multi-stage flotation by rougher, scavenger, and cleaner stages. Different dosages of kerosene and MIBC (4-Methyl-2-pentanol) were applied and the optimum dosage was selected by testing in each flotation stage. With the combination of each

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gold processing equipment for refractory gold

Refractory gold Free Online Library . The early and routine use of process mineralogy in optimizing refractory gold ore technology is a cost efficient tool to insure high recoveries and improved equipment performance Mineralogical studies can determine typical and unusual refractory gold ore process parameters prior to costly and time consuming test work

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autoclaveing process for refractory ore

Process for recovery of gold from refractory ores , - Know More. Dec 10, 1991 0183 32 The present invention is directed to an improvement in a process for the recovery of gold from refractory sulfidic auriferous ores which comprises oxidizing a slurry of ore with oxygen gas under pressure in the presence of sulfuric acid, neutralizing the oxidized slurry, cyanidizing the

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Gold Extraction from Cyanidation Tailing Using Microwave ...

At present, gold mines are increasingly scarce in the world. The yield of cyanidation tailing (CT) of refractory gold ores with a grade of 10 g/T is huge; however, the effective capitalization of the cyanidation tailing is a significant problem in the gold industry. In this work, a new treatment method, a microwave-roasting process developed.

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Microwave energy for mineral treatment processes—a brief ...

This review is a brief account of R&D results generated from microwave-assisted mineral treatments tests. The R&D results demonstrate that microwave energy has potential in mineral treatment and metal recovery operations such as heating, drying, carbothermic reduction of oxide minerals, leaching, roasting/smelting, pretreatment of refractory gold ore and concentrate,

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Gold-bearing arsenopyrite and pyrite in refractory ores ...

Gold-bearing arsenopyrite and pyrite in refractory ores: analytical refinements and new understanding of gold mineralogy Volume 71, Issue 2 M. Benzaazoua (a1) (a2) , P. Marion (a1) , F. Robaut (a3) and A. Pinto (a4)

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Microwave Pretreatment of Refractory Gold Ores - CNKI

Abstract: The microwave pretreatment processes of refractory gold ores in solid and slurry, and effects of the microwave pretreatment on cyanide leaching are investigated The mechanism of microwave pretreatment is described The cyanide leaching recovery of Au in the sample A is up to 86 50%~89 19% with the solid microwave pretreatment, and the cyanide leaching

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Concentrate Using Microwave Assisted Leaching

The refractory gold ore and concentrate were obtained from a gold mine in Haenam, Korea. ... refractory gold concentrate, a microwave system (2.45

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Recovery of Gold from the Refractory Gold Concentrate ...

Apr 28, 2020 · Gold has excellent physical and chemical properties, and is one of the most important noble metals. The current rapid decline in high-grade gold ores and readily available low-grade gold ores has made the mineral processing industry increasingly reliant on complex and refractory gold ores [1,2].Consequently, mineral processing challenges related to the

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Pretreatment Process on Refractory Gold Ores with As

Kyuesi and Haque, etc. have studied the role of microwave in the gold extraction process of arsenic-bearing refractory gold ore. 8,9) 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 ...

Read More
autoclaveing process for refractory ore

Process for recovery of gold from refractory ores , - Know More. Dec 10, 1991 0183 32 The present invention is directed to an improvement in a process for the recovery of gold from refractory sulfidic auriferous ores which comprises oxidizing a slurry of ore with oxygen gas under pressure in the presence of sulfuric acid, neutralizing the oxidized slurry, cyanidizing the

Read More
The Separation of Carbonaceous Matter from Refractory Gold ...

Nov 01, 2021 · As a pre-treatment method of refractory gold ore, carbonaceous matter (C-matter) flotation was investigated with multi-stage flotation by rougher, scavenger, and cleaner stages. Different dosages of kerosene and MIBC (4-Methyl-2-pentanol) were applied and the optimum dosage was selected by testing in each flotation stage. With the combination of each

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US5824133A - Microwave treatment of metal bearing ores and ...

US5824133A US08/614,352 US61435296A US5824133A US 5824133 A US5824133 A US 5824133A US 61435296 A US61435296 A US 61435296A US 5824133 A US5824133 A US 5824133A Authority US United States Prior art keywords cavity ore concentrate microwave energy Prior art date 1996-03-12 Legal status (The legal status is an assumption and is not a

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gold processing equipment for refractory gold

Refractory gold Free Online Library . The early and routine use of process mineralogy in optimizing refractory gold ore technology is a cost efficient tool to insure high recoveries and improved equipment performance Mineralogical studies can determine typical and unusual refractory gold ore process parameters prior to costly and time consuming test work

Read More
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

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The Application and Advantages of Microwave Heating

Jul 21, 2017 · In the late 1980s, microwave can be used in the pretreatment of refractory gold deposits, the recovery of gold from low-grade ores and tailings, the extraction of rare metals and heavy metals,the ...

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Study on Vacuum Roasting Pretreatment of Carbonaceous Gold ...

Nov 15, 2021 · Carbonaceous gold ores are important refractory gold ores in the world. In China, the accumulated resources of carbonaceous gold ores are 1,000 t, accounting for 8% of the gold resources and ranking second in the world [2–4]. Therefore, the development and utilization of carbonaceous gold ores have gained considerable attention .

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(PDF) Microwave-assisted leaching—a review | Mohammad Al ...

It was indicated that microwave energy The main types of dielectric polarization are (Metaxas could have a potential application in comminution, and Meredith, 1983): drying, pre-treatment of refractory gold ores, coal desulphurisation, leaching, roasting, carbon reactiva- electron polarization due to the change of electron tion, carbothermic ...

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10.1016/j.mineng.2009.09.018 | DeepDyve

Jun 11, 2020 · It has been demonstrated that microwave heating of primary refractory gold ores not only effectively oxidizes the sulfide matrix and so increases gold recovery during the cyanidation process, but also has the potential to significantly reduce the operating cost compared to other pretreatment processes, such as autoclave, roaster, bio-oxidation ...

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