microwave pretreatment of a refractory gold

Microwave roasting of a carbonaceous sulphidic gold …

Gold ores containing carbonaceous matter and sulphidic minerals are generally referred to as double refractory. Extraction of the gold from such ores usually requires an oxidation step to both liberate the ultra-fine gold from the matrix of the sulphides and remove the carbon that preg-robs the dissolved gold. In this investigation, a double refractory flotation concentrate was microwave ...

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refractory ore gold and pretreatment 2012

Home>Solutions > refractory ore gold and pretreatment 2012 150tph andesite crushing and reshaping production line Material : andesite Output size : 0-5-10-20-30mm Capacity : 150tph Equipment : ZSW1100X4200+PE750X1060+CSB160+VSI5X8522 Message ...

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Optimizing the alkaline oxidation pretreatment of a …

 · This study investigates the alkaline oxidation pretreatment process of Zarshuran refractory gold ore. Taguchi method-orthogonal array design (OAD) is applied to evaluate and optimize the influence of five main factors including solution pH, aeration rate, …

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Pretreatment Process on Refractory Gold Ores with As

The process of crushing or decomposition before gold leaching is called pretreatment 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.

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Pretreatment Microwave Pretreatment Of A Refractory …

Pretreatment Microwave Pretreatment Of A Refractory Gold Study on microwave pretreatment of refractory,By using the heating feature of microwave, it has shown from condition tests that the gold leaching recovery can be improved from 74% to more than 90% if the gold concentrates is treated for minutes in a microwave oven at 450. therefore, the gold leaching recovery of cyanide residue of more ...

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refractory gold pretreatmentbing

microwave pretreatment of a refractory gold cellhd Gold ore which is difficult to concentrate often referred to gold or refractory gold ore, whi pre-treatment package, Microwave . …

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Removal of arsenic and sulfur from a refractory gold …

 · Prior investigation by the authors on the microwave pretreatment of a typically primary refractory gold flotation concentrate demonstrated that a maximum gold recovery of 97% was achieved, and that gold recoveries of the refractory gold concentrate quickly increased to the maximum with microwave irradiation time (Qiao, 2005).

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Extraction of Gold from a Low-Grade Double Refractory …

Abstract The treatment process of a low-grade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by all-sliming cyanidation was only 11.75%. Hence, a pretreatment was necessary. In ...

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pretreatment of refractory gold ore with microwaves

 · 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 ...

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Microwave Assisted Pretreatment Of Refractory Gold Ores

Microwave Assisted Pretreatment Of Refractory Gold Ores Pretreatment of arsenic-bearing gold ore with microwave-assisted alkaline leaching Pretreatment of arsenic-bearing gold ore with microwave-assisted alkaline leaching Ma Honghou Yan Chao Wang Yaoning 2016-06-01 000000 In this paper the removal of arsenic from arsenic-bearing gold ore through air oxidation and sodium hydroxide leaching …

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Energies | Free Full-Text | Grinding Behaviour of …

 · Microwave pretreatment has been studied in two ways: microwave-assisted sorting and microwave-assisted grinding [24]. The former has been demonstrated to reduce the rock to be comminuted by about 30%, by sorting the gangues from the targeted minerals after microwave treatment [ 25 ], while some of the previous studies on the latter approach are presented in Table 1 .

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Microwave roasting of flash flotation concentrate …

 · Nanthakumar et al. (2007) investigated the use of microwave energy in pretreating a double refractory gold ore containing 1.56% sulphur and 5.96% total carbon. Wei et al (2009) applied microwave energy in a similar pretreatment of refractory gold ores and reported improvements in the subsequent gold extraction.

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gold refractory ores microwave assisted recovery

Sep 01, 2007 · Microwave pretreatment of a double refractory gold ore Microwave pretreatment of a double refractory gold ore Nanthakumar, B.; Pickles, C.A.; Kelebek, S. 2007-09-01 00:00:00 Double refractory gold ores, such as Barrick''s Goldstrike ore, contain

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Removal of arsenic and sulfur from a refractory gold …

Removal of arsenic and sulfur from a refractory gold concentrate by microwave heating @article{Shaojian2010RemovalOA, title={Removal of arsenic and sulfur from a refractory gold concentrate by microwave heating}, author={Ma Shao-jian and W. Luo and W. Mo and Su Xiu-juan and P. Liu and Yang Jin-lin}, journal={Minerals Engineering}, year={2010}, volume={23}, pages={61-63} }

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Potential pre-treatment and processing routes for recovery of gold from complex (refractory) gold …

2.1 Microwave pre- treatment of refractory gold ores Most of refractory gold occurs within sulphide minerals such as FeS 2 and FeAsS and are treated by roasting, pressure leaching or bacterial leaching to render the gold amenable to recovery by subsequent

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STUDY ON MICROWAVE PRETREATMENT OF …

STUDY ON MICROWAVE PRETREATMENT OF REFRACTORY MICRODIMENSIONAL GOLD PACKAGED BY PYRITE IN GOLD ORES WEI Ming an, ZHANG Rui min (Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China)

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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 ...

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refractory gold ore crushing process,stone quarry south …

Review Pretreatment Process on Refractory Gold Ores wave in the gold extraction process of arsenicbearing refractory 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 ...

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Review Pretreatment Process on Refractory Gold Ores with As

decomposition before gold leaching is called pretreatment 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

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microwave pretreatment of a double

 · 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 leaching One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon.

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Leaching of Refractory Gold Ores by Microwave …

 · 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 x-ray structural analysis (XRD) and scanning electron microscopy (SEM) before and after microwave irradiation. Compared to conventional processes, microwave leaching processes …

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Optimizing the alkaline oxidation pretreatment of a …

 · References Pretreatment methods used Results Nanthakumar et al [] Microwave pretreatment For both conventional and indirect microwave roasting, gold recoveries of over about 98% were achieved after cyanide leaching. Li et al [] Pre-oxidation by ozone and ferric

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MICROWAVE IRRADIATION PRETREATMENT OF A …

ABSTRACT Microwave energy was applied in the pretreatment of a typical refractory arsenopyritic gold concentrate. More than 80% of As and S were volatilized off as As 2 O 3 and SO 2 ; whereas iron was oxidized mostly to hematite (Fe 2 O 3 ). All the gold was present in the calcine which responded favourably to the conventional alkaline cyanidation process and yielded 98% of Au and 60% of Ag ...

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microwave pretreatment of a refractory gold

 · Dec 10, 2011· 2.5. Microwave assisted pretreatment of refractory gold concentrate. Gold is considered to be refractory when it cannot be easily recovered by alkaline cyanide leaching. The vast majority of refractory gold occurs in sulphidic minerals such as …

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Model of process of microwave action on refractory …

1. A number of different methods have been used to study the material composition and particle size distribution of a gravity concentrate.2. Several different processing regimes have been tested in the treatment of the gravity concentrate in a microwave field. It has been established that a processing scheme consisting of calcination followed by cyaniding gives a 94.8% recovery of gold from ...

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Removal of arsenic and sulfur from a refractory gold …

 · Microwave pretreatment of a double refractory gold ore Minerals Engineering, 20 ( 11 ) ( 2007 ), pp. 1109 - 1119 Article Download PDF View Record in Scopus Google Scholar

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Microwave energy for mineral treatment processes—a …

 · Microwave assisted pretreatment of refractory gold concentrate Gold is considered to be refractory when it cannot be easily recovered by alkaline cyanide leaching. The vast majority of refractory gold occurs in sulphidic minerals such as pyrite …

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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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Experimental Study on Microwave Pretreatment with …

The microwave pretreatment of a typically refractory flotation gold concentrate was investigated. The results demonstrated that a maximum gold recovery of 97% was achieved, and that gold recoveries of the refractory gold concentrate quickly increased to the maximum with microwave heating time. Adding additives during microwave heating process was helpful to improve the leaching rate of gold ...

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pretreatment of refractory gold ore with microwaves

The microwave pretreatment processes of refractory gold ores in solid and slurry, and effects of the microwave. This page is about pretreatment of refractory gold ore with microwaves in johannesburg gauteng south africa, click here to get more infomation about .

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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 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 ...

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Review Pretreatment Process on Refractory Gold Ores with As

Pretreatment Process on Refractory Gold Ores with As Xin-yuan NAN, Xin CAI* and Jun KONG School of Electrical Engineering, Xinjiang University, 1230 Yan''an Road, Tianshan District, Urumqi, 830047 P. R. China.

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microwave pretreatment of a refractory gold

Home microwave pretreatment of a refractory gold

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Microwave Pretreatment Of A Refractory Gold

Microwave pretreatment of a refractory gold 465 pretreatment of refractory gold ore with microwaves Pretreatment Process on Refractory Gold Ores with As Jun 24 2017183 Gold ores are considered refractory if gold extractions from a conventional cyanidation ...

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