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Recovery of gold from sulfide refractory gold ore: Oxidation …

Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many oxidation pretreatment technologies were …

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THE TREATMENT OF REFRACTORY COPPER-GOLD ORES …

Activox® is a hydrometallurgical process used to oxidise sulphide concentrates. The process is based on two relatively simple, established unit operations; i.e. fine or ultra-fine …

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EVALUATING PROCESS OPTIONS FOR TREATING …

A significant contemporary challenge for gold mining companies is to define economic process options for treating more complex ore bodies as the less refractory ores become depleted.

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Recovery of copper from dump slag by a segregation process

When the slag was roasted at 650 with 1% NaC1 and 3% coke more than 90% of the copper was recovered. Slag with an initial copper content below 1% cannot be treated by the conventional TORCO (Treatment of refractory copper ores) process with sodium chloride as a chloridizing agent.

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Treatment of a refractory gold—copper sulfide concentrate by copper

The use of thiosulfate to extract gold from refractory ores is promising because of its non-toxicity and high selectivity. Sulfide minerals (i.e., pyrite, arsenopyrite, chalcopyrite), major gold carriers in refractory gold ores, however, hinder gold extraction due to the high consumption of a lixiviant. ... Treatment of a refractory gold-copper ...

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Flotation of Gold and Gold-Bearing Ores

Gold particles in an ore deposit will vary in size from large nuggets to particles locked in the crystal lattice of sulfide minerals. These sulfide minerals are referred to as gold carrier minerals and contain trace to minor amounts of gold (Taggart, 1927, Chryssoulis and Cabri, 1990).Often it is found that gold ores are refractory due to the small size of the gold …

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Case study flowsheets: copper–gold concentrate treatment

The conventional treatment of copper–gold concentrates involves smelting, converting, and electro-refining to produce a copper-cathode product. The conventional treatment of copper–gold concentrates does elicit some compelling reasons to seek an alternative hydrometallurgical process for the recovery of concentrate values.

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Treatment of oxidized copper ores with emphasis on refractory ores

Treatment of oxidized copper ores with emphasis on refractory ores Author TONG DENG; JIAYONG CHEN Acad. sinica, inst. chemical metallurgy, Beijing 100080, China Source. Mineral processing and extractive metallurgy review. 1991, Vol 7, Num 3-4, pp 175-207, 33 p ; ref : 201 ref

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Treatment of Au-Cu refractory ores using SART Technology: …

Buy Treatment of Au-Cu refractory ores using SART Technology: Design of a 40 cbm/hr copper recovery plant for a gold mine with Au-Cu bearing refractory ores on Amazon FREE SHIPPING on qualified orders ... Copper grade of Athens gold mine was found to be 1100g/t after a series of metallurgical test-works performed. Process design proves that ...

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Treatment of sulphide-oxide copper ore by segregation

During the present authors testing of the segregation of Santa Rosalia (SR) copper ore, sulphide copper rather than metallic copper was found to precipi- rate on coal particles. The present work reports the results of investigations on the optimization of segregation conditions for the SR ore and the results of the identification of segregation ...

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Pretreatment and Processing Refractory Gold and Copper Ore for …

Pre-treatment: Refractory ores are often pre-treated to make the copper and gold more accessible to leaching. ... Here are ten literature references related to processing refractory copper and ...

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A Preliminary Study on Nitric Acid Pre-treatment of Refractory …

In this regard, nitric acid can be also used to readily destroy the gold-bearing phases such as pyrite and arsenopyrite and recalcitrant silver sulphides in refractory gold and silver ores ...

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The treatment of copper–gold ores by ammonium thiosulfate leaching

Copper–gold ores form a type of refractory gold ore. Large quantities of this ore type are available for processing. Cyanide treatment of ores with a high cyanide soluble copper to gold ratio is unfavourable due to high cyanide consumption resulting from the formation of copper–cyanide complexes.

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THE TREATMENT OF REFRACTORY COPPER ORES BY …

The treatment of refractory copper ores by the segregation process— E. T. Pinkney and N. Plint 41 In treating calcitic and dolomitic ores, the first question is the possibility of the formation of …

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Flotation behaviour of gold during processing of porphyry copper …

Some of the innovative flotation practice.~, are discussed. 0 1997 Elsevier Science Ltd KeyworiJs Gold ores, flotation depressants, flotation collectors, mineral processing E47RODUCTION The flotation characteristics of gold or gold minerals found in porphyry copper ores and in refractory sulphide ores hai,e not been described in detail in the ...

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ALTA Gold 2012 E-Doc

Demonstration of economic treatment options allows gold companies to maintain and increase their ... options for treating more complex orebodies as the less refractory ores become depleted. ... (and Luzonite) is a common copper-arsenic mineral that can be a significant gold carrier. Other less common are chalcopyrite and other sulphides and ...

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Flotation behaviour of gold during processing of porphyry copper …

This may be an alternative treatment route for gold room applications where fine gold losses can occur when treating gravity concentrates with pyrite and copper sulphides present. Floating gold from the sulphides could produce a directly smeltable product. Copper sulphides are selectively floated from pyrite ores at high pH's in excess of 11.

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Refractory gold ores: Challenges and opportunities for …

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 …

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Refractory Gold Ore Treatment Methods

E. B. Leaver and J. A. Woolf of the U.S. Bureau of Mines described a number of experiments on California carbonaceous ores in T.P. 481, 1924, and some of their further work on the same subject was published in R.I. 2998, U.S.B. of M., 1930. Cyanidation and concentration of gold and silver ores. List Gold Refractory Process Methods

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sbm treatment refractory copper ores.md

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Cyanidation of Refractory Gold Ores: A Review

However, the treatment of so-called refractory gold ores using cyanidation is problematic and new solutions are needed due to the constant depletion of easy-to-treat gold ores [1,3]. ...

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Oxidative pretreatment of refractory gold ore using persulfate …

The pretreatment of refractory gold ore is a complex chemical process. In addition to the oxidation of pyrite, some side reactions also occur. The phase changes of refractory gold ore before and after pretreatment are shown in Fig. 11. The main phases of refractory gold ore include quartz (SiO 2), pyrite (FeS 2), and dolomite (CaMg(CO 3) 2 ...

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Treatment of sulphide-oxide copper ore by segregation

Oxidizing-roasting of the ore at a temperature of 800°C results in the formation of copper oxides. By segregating the ore thus oxidized with the addition of 1% NaCl and 1.5% …

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Treatment Of Copper-Cobalt Oxide Ores By The Segregation …

The segregation process has been known for many years and applied industrially for the treatment of various refractory copper ores. The principles of the process are briefly reviewed; the process was tested in the laboratory on two copper-cobalt oxide ores from Gecamines, Shaba Province, Zaire. Various parameters of the process, such as segregation temperature, dosage …

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Beneficiation of Gold and Silver Ores

The nanosecond HPEMP treatment showed promising results in the treatment of gold refractory ores due to high efficiency and selectivity in the disintegration of mineral complexes. ... Flotation behaviour of gold during processing of porphyry copper-gold ores and refractory gold bearing sulfides. Minerals Engineering 10: 895–908.

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Enhanced leaching of copper from refractory oxidized copper ore …

Herein, to improve the leaching rate of copper, an enhanced leaching test of refractory copper oxide ore from Luanshya was conducted using CaF 2 as a leaching aid. The effects of the sulfuric acid dosage, CaF 2 dosage, time, and temperature on leaching were also studied. The CaF 2-enhanced leaching of cupriferous biotite and phlogopite was theoretically …

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(PDF) Ammoniacal Cyanide Leaching for Gold Recovery

Breuer, P L, Dai, X and Jeffrey, M I, 2005. Leaching of gold and copper minerals in cyanide deficient copper solutions, Hydrometallurgy, 78(3-4), 156-165. Bulatovic, S M, 1997. Flotation behaviour of gold during processing of porphyry copper-gold ores and refractory gold-bearing sulphides, Minerals Engineering, 10(9), pp 895–908.

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The treatment of refractory copper ores by the segregation process

Probably the most important differences are the following: (1) The heating unit is a fluidized bed roaster which provides efficient heat transfer and which also permits roasting of any copper …

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Chlorination Treatment for Gold Extraction from Refractory Gold-Copper

In refractory gold-bearing concentrates, the gold metal is generally contaminated and encapsulated either in a sulfide matrix or in quartz, while the efficiency of the extraction of gold is low due to the structural/chemical characteristics of the concentrates itself [].Refractory concentrates, which have gold in the form of fine inclusions in sulfides, contain 30% of the …

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Pretreatment of refractory gold ore by curing with concentrated

2.1 Materials and reagents. All the reagents used in the experiment, such as sulfuric acid (H 2 SO 4), nitric acid (HNO 3), copper sulfate (CuSO 4), sodium thiosulfate (Na 2 S 2 SO 3), and sodium hydroxide (NaOH), were analytically pure, and the water used in the whole experiment was deionized water with the electrical resistivity of 18.5 MΩ*cm.. The refractory …

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