collectorless flotation of gold

MINING

A review of the flotation of native gold and electrum ...

Collectorless flotation If native gold does have some natural floatability it may be possible to float such gold before proceeding with flotation of other minerals such as auriferous pyrite or base metal sulphide minerals.

The behaviour of free gold particles in a simulated flash ...

Interestingly in comparison to gravity-recoverable gold recovery from pure Au powders was better in collectorless flotation and cumulative recovery decreased with higher levels of collector addition. Improved coarse particle recovery appeared linked to increased collector additions for both the gravity concentrate and the pure gold powders.

Gold Ore Processing Volume 15 - 2nd Edition

Chapter 20. Flotation of Gold and Gold-Bearing Ores . 1. Background; 2. Collectorless Flotation of Naturally Occurring Gold; 3. Collectors in Gold Flotation; 4. Frothers in Gold Flotation; 5. Activators in Gold Flotation; 6. Depression of Gold in Flotation; 7. Flotation of Gold and Gold-Bearing Minerals; 8. Influence of Conditions on Gold ...

A potential application of collectorless flotation in a ...

Request PDF | A potential application of collectorless flotation in a copper/gold operation | A recent study found that chalcopyrite in the Telfer ore could float without a collector whilst pyrite ...

Reagents to Recover Gold - 911metallurgist.com

The industrial processing of ores containing precious metals such as gold is generally very mining site specific. The variety of various mineral processing techniques employed is extensive and includes size reduction size classification gravity separation roasting cyanidation chemical and/or bacterial leaching ion exchange and/or solvent extraction and froth flotation. Gold occurs in ...

(PDF) Redox potential control during flotation of sulphide ...

The electrodes were platinum gold chalcopyrite pyrite and galena. ... Behaviour and mechanism of collectorless and collector-induced flotation of sulphide minerals in various flotation systems ...

Selectivity in the Collectorless Flotation of Two Complex ...

"Laboratory investigations on two complex ores the A1 zone ore from Les Mines Selbaie and the Lyon Lake ore from Mattabi Mines Ltd. (Division of Noranda Minerals) have been carried out to determine some of the main variables in collectorless flotation.

Flotation of Gold and Gold-Bearing Ores - ScienceDirect

Collectorless Flotation of Naturally Occurring Gold Numerous references are to be found in the literature on the observed skin flotation of gold especially during the recovery of gold by gravity separation (Hoover 1916 Rickard 1917 Taggart 1945). On this evidence gold was presumed to be naturally hydrophobic.

Gold recovery from chalcopyrite concentrates in the ...

Gold does float readily however and the free gold can be selectively floated away from an ore containing sulphides. This may be an alternative treatment route for gold room applications where ...

Effect of Particle Size on Gold Flotation Recovery

Natural or collectorless flotation of native or free gold is generally possible at least to a degree with many gold containing ores. The first factor in such flotation studies is the quantification of what the limitations are of particle size on the flotation process. Some unique studies have been conducted by this author at a number of plants.

A review of the flotation of native gold and electrum ...

The range of applicability of flotation is from about 200 μm flakes to 1 μm particles. Fundamental concepts of gold and electrum flotation are considered including the possibility of collectorless flotation of the minerals. This question is not yet resolved properly but gold in some ores does float without a collector.

Gold recovery from chalcopyrite concentrates in the ...

A potential application of collectorless flotation in a copper/gold operation ... Gold flotation is often overlooked as a processing option as the precious metal is viewed as being associated with ...

A potential application of collectorless flotation in a ...

The 30 min pre-aeration promoted collectorless flotation of chalcopyrite but had a negligible effect on pyrite flotation. Pyrite only started to float strongly when the collector was added.Gold recovery was 70.4% at the end of the 10 min collectorless flotation and increased to 94.3% after extended 6 min flotation with collector addition. The increased gold recovery appeared to be strongly associated with pyrite flotation.

(PDF) A Brief Review of Auriferous Sulphide Flotation ...

Notwithstanding in the separation of gold bearing sulphides during froth flotation a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and ...

Effect of Particle Size on Gold Flotation Recovery

Natural or collectorless flotation of native or free gold is generally possible at least to a degree with many gold containing ores. The first factor in such flotation studies is the quantification of what the limitations are of particle size on the flotation process.

JME

application of collectorless flotation in a copper/gold operation Mineral engineering 23: -902. [3]. Yoon R.H. (1981) Collectorless flotation of chalcopyrite and sphalerite ores by using sodium sulfide International Journal of Mineral Processing 1-48.) E(V) vs Ag/AgCl A

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collectorless flotation of gold