Potential controlled flotation and depression of copper

Jan 01, 1989 The complete behavior of flotation and depression of copper sulfides and oxides as a function of potential modified by sodium hydrosulfide in certain non-xanthate collector systems was studied using a Sulfide Ion Electrode (SIE). Detailed flotation tests on three diverse copper ores, using different types of collectors, and two Cu-Mo

A novel copper depressant for selective flotation of

Jun 01, 2020 Commonly, the separation of copper sulfide and molybdenite is achieved by means of Cu-Mo bulk flotation, followed by selective flotation of molybdenite from chalcopyrite using copper depressants such as sodium sulfide, sodium hydrosulfide, cyanide and Nokes reagents (Pearse, 2005, Ansari and Pawlik, 2007, Yin et al., 2017a, Yin et al., 2017b

CA2945354A1 Depression of copper and iron sulfides in

A method of depressing copper sulfides and iron sulfides in a molybdenite floatation recovery process uses alkaline or alkaline earth potysulftdes at high concentrate pH. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one

Minerals Free Full-Text Derivation of Flotation

Based on Figure 3, the condition for more heavily oxidized copper sulfides, i.e., 96 h, was chosen for use in succeeding flotation tests to evaluate the activation and depression of minerals by NaHS. Figure 4 shows the single mineral flotation results of chalcocite, bornite, and chalcopyrite.

Oxidation/Reduction Effects in Depression of Sulfide

Feb 01, 1985 A review of the published literature on the mechanism of depression of sulfide minerals shows that a unified theory is not yet available. Various mechanisms that have been postulated include competition between depressants and collectors to adsorb at the surface sites, creation of thermodynamic conditions nonconducive for formation of a metal collector salt, or formation of a

(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% Cu, 67.69% Pb,

CANATUAN CU/ZN FLOTATION METALLURGY

Copper, zinc, sulphide, separation, activation, depression, flowsheet INTRODUCTION TVI Pacific Inc. is a publicly-traded resource company focused on the production, development,

Minerals Free Full-Text Derivation of Flotation

The wettability and floatability of oxidized chalcocite, bornite, and chalcopyrite with the conditions of sodium hydrosulfide (NaHS) dosages and pHs were studied by contact angle measurements, and single and mixture mineral flotation tests. To evaluate the results of the flotation, the flotation kinetic model for copper sulfide minerals treated by NaHS was derived.

Potential controlled flotation and depression of copper

Jan 01, 1989 The complete behavior of flotation and depression of copper sulfides and oxides as a function of potential modified by sodium hydrosulfide in certain non-xanthate collector systems was studied using a Sulfide Ion Electrode (SIE). Detailed flotation tests on three diverse copper ores, using different types of collectors, and two Cu-Mo

WO2015157498A1 Depression of copper and iron sulfides in

A method of depressing copper sulfides and iron sulfides in a molybdenite floatation recovery process uses alkaline or alkaline earth potysulftdes at high concentrate pH. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one

Depressants Solvay

Solvay has developed highly efficient and versatile sulfide mineral depressants in diverse applications. In the Cu-Mo separation system, AERO® depressants assist in the depression of copper and iron sulfides at lower doses than traditional depressants such as NaHS and Nokes reagents.

THE EXTRACTION OF MOLYBDENITE FROM CERTAIN COPPER

The Depression of the Molybdenite 7 The Depression of the Copper and Iron Sulfide Minerals Using a Heat Treatment 8 The Depression of the Copper and Iron Sulfide Minerals with a Chemical M Other Procedures for Depressing the Copper and Iron Sul­ fide Minerals with Chemicals . 16 CHAPTER 3. THE EXPERIMENTAL PUN. 19 Introduction 19 Problem One 19

Use of ZnSO4 and SDD mixture as sphalerite depressant in

The depression performance and mechanism of the zinc sulfate (ZnSO4) and sodium dimethyl dithiocarbamate (SDD) combined depressant with butyl xanthate (BX) as collector in a mixed Cu-Zn sulfide

Enhancing flotation separation of chalcopyrite and

Mar 18, 2021 The effect of a new polysaccharide on the depression of talc and the flotation of a nickel-copper sulfide ore (vol 77, pg 99, 2015). Miner. Eng. 89,118–118.

Flotation Behavior of Complex Sulfide Ores in the Presence

Jun 12, 2017 As for zinc, Figure 10 shows that, at 50 g/ton of chitosan, the recovery of zinc in the froth increased by 40% compared to NaCN at its optimum dosage which is undesirable in the differential flotation of sulfide minerals where lead and copper sulfides are floated in the first flotation stages while sphalerite is depressed. Results also revealed

The depression of pyrite in selective flotation by

Oct 01, 2016 The selective depression of pyrite was attributed to the formation of more copper hydroxide species on copper-activated pyrite surface through the consumption of oxygen (Shen et al., 2001). Galvanic interactions may occur between the cuprous sulfide layer on pyrite or sphalerite surface and the mineral itself.

CANATUAN CU/ZN FLOTATION METALLURGY

Copper, zinc, sulphide, separation, activation, depression, flowsheet INTRODUCTION TVI Pacific Inc. is a publicly-traded resource company focused on the production, development,

The depression of pyrite in selective flotation by

Different reagents are usually applied in the selective separation and depression of iron sulfide minerals; they include inorganic depressants such as cyanide, lime, oxygen conditioning, sulfite

Selective flotation of molybdenite from chalcopyrite

The subsequent decrease in depression may result from partial oxidation of copper sulfide mineral surfaces, which may adsorb neutral di-xanthogen as a collector, thereby increasing floatability. Dixanthogens have proved to be good collectors for partly oxidized copper sulfides and cement copper under certain conditions.

Selective depression effect in flotation separation of

done on the copper sulfide ore depressants for copper–molybdenum separation, there is still a lack of understanding on the flotation characteristics of copper− molybdenum sulfides when DMSA is used as the depressant. Thus, the main purpose of this work is to investigate the copper–molybdenum separation

NIOSHTIC-2 Publications Search 10011090 Hydrosulphide

To elucidate the mechanisms of sulfide mineral depression, the U.S. Bureau of Mines examined the depressant effect of hydrosulfide on flotation of copper sulfides, using electrochemical techniques and flotation tests. Hydrosulfide addition is commonly used to achieve separation of copper sulfides from molybdenite. Depression of chalcocite and chalcopyrite floated by ethylxanthate and o-isobutyl-

US7004326B1 Arsenide depression in flotation of multi

A mineral separation process includes wet-grinding the ore to liberation of minerals, oxidizing the slurry using air, hydrogen peroxide or other oxidants and floating the valuable minerals at a pH between about 9.0 and 10.0 with a xanthate as collector, and a combination of a polyamine and a sulfur containing species as depressants for arsenide minerals.

Selective depression effect in flotation separation of

done on the copper sulfide ore depressants for copper–molybdenum separation, there is still a lack of understanding on the flotation characteristics of copper− molybdenum sulfides when DMSA is used as the depressant. Thus, the main purpose of this work is to investigate the copper–molybdenum separation

Depressants Solvay

Solvay has developed highly efficient and versatile sulfide mineral depressants in diverse applications. In the Cu-Mo separation system, AERO® depressants assist in the depression of copper and iron sulfides at lower doses than traditional depressants such as NaHS and Nokes reagents.

Flotation Behavior of Complex Sulfide Ores in the Presence

Jun 12, 2017 As for zinc, Figure 10 shows that, at 50 g/ton of chitosan, the recovery of zinc in the froth increased by 40% compared to NaCN at its optimum dosage which is undesirable in the differential flotation of sulfide minerals where lead and copper sulfides are floated in the first flotation stages while sphalerite is depressed. Results also revealed

Recovering Moly from Copper Oxide and Sulfide Froth

But is brief you have to regrind your copper sulfide concentrate to less than definite size such as d99 smaller -0.045 mm and then depress the copper sulfide and float the MoS2, one rare hydrophobic mineral. There are a lot of details and technical notes in operation of the plants and also in engineering which is important to consider.

US7004326B1 Arsenide depression in flotation of multi

A mineral separation process includes wet-grinding the ore to liberation of minerals, oxidizing the slurry using air, hydrogen peroxide or other oxidants and floating the valuable minerals at a pH between about 9.0 and 10.0 with a xanthate as collector, and a combination of a polyamine and a sulfur containing species as depressants for arsenide minerals.

Selective flotation of molybdenite from chalcopyrite

The subsequent decrease in depression may result from partial oxidation of copper sulfide mineral surfaces, which may adsorb neutral di-xanthogen as a collector, thereby increasing floatability. Dixanthogens have proved to be good collectors for partly oxidized copper sulfides and cement copper under certain conditions.

CANATUAN CU/ZN FLOTATION METALLURGY

Copper, zinc, sulphide, separation, activation, depression, flowsheet INTRODUCTION TVI Pacific Inc. is a publicly-traded resource company focused on the production, development,

Overdose NaHS Depression Froth Flotation (Sulphide

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

2. Sulphide as depressant (S 2-) Lead sulphide is a very insoluble compond so that additions of sodium sulphide (Na 2 S) result in the formation of lead sulphide rather than lead xanthate. 2PbX 2 (s) + S- PbS(s) + 2X The depression effect of S2-depends on pH of the solution. Of all the sulphides listed ,

Copper Wikipedia

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.A freshly exposed surface of pure copper has a pinkish-orange color.Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling

Copper Molybdenum Flotation depressant Barium Sulphate

Separation and upgrading the molybdenite from the bulk copper-molybdenite concentrate is generally accomplished by selective molybdenite flotation following copper and iron sulphide depression. Standard depressant schemes include high pH via lime addition, sodium hydrosulphide, Nokes reagent, etc.

Copper-Lead-Zinc ores Danafloat

This flotation step is conducted at alkaline pH. In the case where galena is floated and the copper minerals are depressed, copper depression can be achieved by using sodium sulphide, hydrosulfite, lime, cyanide, zinc-cyanide and/or ferricyanide complexes. Selection of flotation reagents and frothers is an important, even critical, consideration.

Depression of gangue minerals using tailor-made CMCs in

Carboxymethyl cellulose, CMC, is widely used in mineral processing as a flotation depressant, mainly for the depression of carbonate and talcaceous gangue in the flotation of Cu-Ni sulfide and PGM

Depression of pyrite in porphyry copper flotation

the copper sulphide 2. Surface Cu activation and genuine flotation 2 grinding medium pyrite e-e-Fe 3+ OH-Galvanic interactions in complex sulphide ores (Huang & Grano, 2005) 40 50 60 70 80 90 • Limited pyrite depression was achieved by increasing the pH with lime • Na 2SO 3and DETA were effective in preventing/reversing the