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The depression of pyrite in selective flotation by

2016-10-1  The depression of pyrite flotation by cyanide may result from one or more of the following mechanisms: (1) Cyanide may depress pyrite flotation by replacing xanthate ions on pyrite surface, similar to hydroxyl ions (Wark and Cox, 1934, Prestidge et al., 1993).

Surface chemistry of activation of lime-depressed pyrite

2021-12-16  The depression of pyrite by lime is attributed to the surface formation of Ca(OH)2, CaSO4 and Fe(OH)3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other

Pyrite Depression in Copper Flotation

2015-10-8  The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper,

An electrochemical investigation of pyrite flotation and

1977-9-1  An electrochemical investigation of pyrite flotation and depression. Int. J. Miner. Process., 4: 227--239. The oxidation of ethyl xanthate on pyrite electrodes, and the influence of the flota- tion depressants hydroxide, cyanide, and sulphide, have been investigated using cyclic voltammetry. A layer of a hydrated iron oxide has been identified

Pyrite Depressant Froth Flotation (Sulphide & Oxide

2022-1-4  Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs. recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation test work. Depressing Pyrite is

Depression of Pyrite in Seawater Flotation by Guar Gum

The application of guar gum for pyrite depression in seawater flotation was assessed through microflotation tests, Focused Beam Reflectance Measurements (FBRM), and Particle Vision Measurements (PVM). Potassium amyl xanthate (PAX) and methyl isobutyl carbinol (MIBC) were used as collector and frother, respectively. Chemical species on the pyrite surface were

Pyrite depression by AMBS Froth Flotation (Sulphide

2022-1-16  While I was studying flotation using seawater, I had a problem with understanding the reason why Aeration and Sodium Metabisulfite is used as a Pyrite depressant in Cu-Mo flotation in seawater. An article said that sufficient Cu-Mo recovery is attained at the expense of allowing large amount of pyrite in flotation froth and AMBS could be a

The role of sodium metabisulphite in depressing pyrite in

2019-10-1  The single minerals, chalcopyrite and pyrite, were obtained from GEOdiscoveries, Australia. Their elemental compositions were analysed by ICP-MS and shown elsewhere (Mu and Peng, 2019).The XRD patterns of chalcopyrite and pyrite samples are shown in Fig. 1(a) and (b), respectively. The impurities in chalcopyrite are mainly quartz and a small amount of sphalerite

Pyrite Depression in Copper Flotation

2015-10-8  The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper, you need to bring the plant’s pH up to the other side (right side) of the PYRITE

2000-Surface chemistry of activation of lime-depressed

2015-4-2  AbstractThe depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other

Depression of Pyrite in Seawater Flotation by Guar Gum

The application of guar gum for pyrite depression in seawater flotation was assessed through microflotation tests, Focused Beam Reflectance Measurements (FBRM), and Particle Vision Measurements (PVM). Potassium amyl xanthate (PAX) and methyl isobutyl carbinol (MIBC) were used as collector and frother, respectively. Chemical species on the pyrite surface were

Pyrite depression during coal flotation Part I — Inorganic

1992-5-1  This investigation is an exploratory study to evaluate a large number of potential pyrite depressants for use during coal flotation. Subsequently, the more promising reagents can be evaluated in detail. Several reagent categories (such as alkalis, lime, oxidizing agents, reducing agents, specific inorganic ions and dispersants) that were found to be effective pyrite

(PDF) The Depression and Adsorption Mechanism of

2019-8-24  The rejection of pyrrhotite and pyrite has become a long-standing problem in the copper ore industry. This paper describes the first successful depression and adsorption mechanism of a novel and

Effects of Pyrite Texture on Flotation Performance of

2021-10-18  Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance.

(PDF) Diethylenetriamine depression of Cu

The results showed that DETA affects the flotation behaviour and surface chemistry of pyrite. However, high dosages are required. Pyrite depression in copper ore flotation often requires large

Journal of Industrial and Engineering Chemistry

Oxidation of pyrite and its effects on the flotation, activation of pyrite, depression of pyrite, are also discussed in detail in this review. In addition, interactions betweenpyrite and

Flotation Depressants Mineral Processing &

2015-8-12  Sodium cyanide. Sodium cyanide is mainly used to depress sphalerite in the first or lead-flotation stage in separating lead from zinc minerals. Its action on pyrite is nearly as strong as on sphalerite, but it does not affect

Mechanism of Depression by Fe3+ During Hemimorphite

2020-9-8  Sulfide hemimorphite can be depressed by Fe3+ during flotation. In this study, the depression mechanism was studied by microflotation, inductively-coupled plasma mass spectrometry, local electrochemical impedance spectroscopy (LEIS), and X-ray photoelectron spectroscopy (XPS). Flotation test results suggested that sulfated hemimorphite can be

2000-Surface chemistry of activation of lime-depressed

2015-4-2  AbstractThe depression of pyrite by lime is attributed to the surface formation of Ca(OH) 2, CaSO 4 and Fe(OH) 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other

Surface chemistry of activation of lime-depressed pyrite in

2000-12-6  Xanthate flotation tests show that oxalic acid and other organic acids, as well as sulphuric acid and other inorganic acids and their salts can restore xanthate flotation of pyrite after depression by lime. In terms of XPS analysis, solution chemistry calculations and

Pyrite depression by phosphates in coal flotation

1998-2-1  The selective depression of pyrite from the Kentucky No. 9 coal seam was systematically examined using various kinds of inorganic and organic chemicals. Most of the organic chemicals tested showed little selectivity in pyrite depression. It was found that both orthophosphate and pyrophosphate were effective for the selective depression of coal pyrite in

(PDF) Diethylenetriamine depression of Cu-activated pyrite

The results showed that DETA affects the flotation behaviour and surface chemistry of pyrite. However, high dosages are required. Pyrite depression in

Effects of Pyrite Texture on Flotation Performance of

2021-10-18  Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance.

(PDF) The Depression and Adsorption Mechanism of

2019-8-24  The rejection of pyrrhotite and pyrite has become a long-standing problem in the copper ore industry. This paper describes the first successful depression and adsorption mechanism of a novel and

Flotation behaviors of pyrites with different chemical

2004-5-1  Microflotation tests, electrokinetic and electrochemical measurements were carried out to investigate the flotation behavior of pyrite samples taken from different regions of Turkey. Chemical analyses and mineralogical examinations showed that these pyrite samples have different impurities and structural properties. The flotation characteristics of pyrites using ethyl

Sodium Metabisulfite MBS for pH Control and Pyrite

2013-8-7  Sodium Metabisulfite aka MBS is used for pH control in froth flotation to control Pyrite depression. Below is a graph showing pH VS pyrite recovery at various collector addition rates. It is also used to prevent flotation of sphalerite by copper activation in the presence of Tennantite/Covellite in the ore. For pyrite flotation, you see maximum

Mechanism of Depression by Fe3+ During Hemimorphite

2020-9-8  Sulfide hemimorphite can be depressed by Fe3+ during flotation. In this study, the depression mechanism was studied by microflotation, inductively-coupled plasma mass spectrometry, local electrochemical impedance spectroscopy (LEIS), and X-ray photoelectron spectroscopy (XPS). Flotation test results suggested that sulfated hemimorphite can be

(PDF) Effect of different depressants on galena flotation

In flotation tests, depression was achieved using non-toxic reagents and consequently individual copper, lead and zinc concentrates assaying 31.68%