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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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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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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Unlock Refractory Gold with ALS: Cutting-Edge Pre-treatment …

Refractory gold evaluation testwork services. Refractory gold ores generally contain sulphide minerals, and as such, a primary flotation stage is the obvious choice to concentrate the sulphides into a smaller mass for downstream pre-treatment prior to …

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Direct Cupric Chloride Leaching of Gold from …

Chloride and thiosulfate may find their uses in the treatment of refractory ores, however, such as complex copper ores (Dreisinger Citation 2005; Zhang and Senanayake Citation 2016), or carbonaceous preg-robbing ores in …

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(PDF) Refractory gold-bearing ores: a review of treatment …

In a paper on treatment methods for refractory gold-bearing ores (Iglesias and Carranza 1994), bioleaching is mentioned as a pre-treatment based on the action of bacteria (mainly Thiobacillus ...

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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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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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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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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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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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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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(PDF) A Review of the Cyanidation Treatment of Copper-Gold Ores …

Research has been undertaken relating to the treatment of copper-gold ores, as well as to the lowering of the effects of copper-cyanide complexes. Some of the processing options include [25,26]: (1) Ore Segregation Technologies Metals 2020, 10, 897 8 of 11 Separating high-copper-containing ores selectively prior to the leaching process is an ...

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Treatment of Oxidized Copper Ores with Emphasis on Refractory …

Oxidized copper ores are exhibiting increasingly their importance as copper resources as worldwide high grade copper sulfide deposits become depleted. Extensive …

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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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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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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 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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Potential pre-treatment and processing routes for recovery of …

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Enhanced leaching of copper from refractory oxidized copper ore …

Numerous researchers have explored various methods to enhance the leaching rate of copper from cupriferous mica or other refractory copper oxide ores. These methods include …

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A systematic review of sustainable gold extraction from raw ores …

copper–gold ores: A dithiophosphate collector at an alkaline pH must be used (controlled by lime or soda ash if the pyrite content in the ore is low). Oxide copper–gold ores: ... which can be accomplished by applying pre-treatments to the refractory ores/concentrates prior to leaching. Some refractory gold ores present unique challenges ...

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Overview of the Challenges and Opportunities in Processing

Molleman E, Dreisinger D (2002) The treatment of copper–gold ores by ammonium thiosulfate leaching. Hydrometallurgy 66(1-3):1–21. Article Google Scholar Aylmore MG (2001) Treatment of a refractory gold-copper sulfide concentrate by copper ammoniacal thiosulfate leaching. Miner Eng 14(6):615–637

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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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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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Ultra Fine Grinding-A Practical Alternative to Oxidative Treatment …

Since early 2001, Kalgoorlie Consolidated Gold Mines (KCGM) has successfully operated an ultra fine grinding (UFG) circuit to supplement its roaster capacity for the treatment of the refractory gold flotation concentrate. A second UFG mill was installed in 2002 taking the total UFG capacity to over 20tph while grinding to 11-12 microns and achieving over 90% gold recovery. A …

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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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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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sbm treatment refractory copper ores.md

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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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Minerals Beneficiation

Copper segregation developments within the Anglo American Group are described with particular reference to the work of the TORCO Project Team. Some radical differences have been adopted in the mechan-ical approach as compared with methods used by previous workers. Most important among these are the following: (1) The heating unit is a fluidized-bed roaster. (2) A …

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