alkaline flotation of copper sulphide
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alkaline flotation of copper sulphide

Alkaline Flotation Of Copper Sulphide

Alkaline Flotation Of Copper Sulphide. 1972-10-10ensp0183enspA method for the flotation of nickel and copper sulphide minerals from talcose bearing ores using an alkaline circuit in which at least one of the alkaline reagents is soda ash or ammonium hydroxide and following conditioning of the pulp with a collecting agent of the xanthate family to activate the nickel and copper sulphide ...

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alkaline flotation of copper sulphide

Alkaline flotation of copper sulphide nkvf-regio20froth flotation is widely used for the treatment of base metal sulphides and relies on the differences in surface chemistry between valuable sulphide minerals and gangue minerals xian et al 2015b ejtemaei and nguyen 2017 pyrite fes 2 and other sulphide minerals are closely associated.

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Copper Sulphide Ore Reagents For Copper Flotation

Alkaline flotation of copper sulphide nkvf-regio20.froth flotation is widely used for the treatment of base metal sulphides, and relies on the differences in surface chemistry between valuable sulphide minerals and gangue minerals (xian et al., 2015b, ejtemaei and nguyen, 2017).pyrite (fes 2) and other sulphide minerals are closely associated with each other in most copper ores, and their.

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FLOTATION OF COPPER AND NICKEL SULFIDES FROM

A method for the flotation of nickel and copper sulphide minerals from talcose bearing ores using an alkaline circuit in which at least one of the alkaline reagents is soda ash or ammonium hydroxide and following conditioning of the pulp with a collecting agent of the xanthate family to activate the nickel and copper sulphide materials, the pulp is conditioned with a flocculating agent to depress the host rock minerals and in which following flotation

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FLOTATION OF COPPER-NICKEL SULFIDE ORES -

A process for the flotation recovery of copper and nickel sulphide minerals from ore containing both such minerals by a process in which at least two conditioning steps precede flotation, said process comprising: -- conditioning a pulp of the ore in the presence of an alkaline agent to produce a conditioned alkaline pulp; then, in at least one further conditioning step, further conditioning said pulp in the presence of a member of the xanthate family of flotation

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Mining Industry Copper Sulfide Ore and Flotation

2019-7-9  Excess lime and sodium sulfide and ammonium sulfide inhibit chalcopyrite in alkaline slurries. (2) Chalcocite (Cu2S) The chalcocite is one of the most common associated copper minerals. It is brittle and easy to be crushed and muddy. It has good floatability in both acidic and alkaline pulps.

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EFFECTS OF EDTA ON SELECTIVE FLOTATION OF

2004-10-13  It is very well known that majority of copper ions added into alkaline solutions precipitate in the form of Cu(OH)2 (Fuerstenau and Fuerstenau 1982). Copper hydroxide can rapidly adsorb on sphalerite surface. However, copper sulphide may form in the following stages due to low stability of Cu(OH)2. At the end of activation

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The electrochemical behaviour of copper in alkaline ...

When the potential increases from −1.2V upwards, copper sulphide layers are firstly formed at potentials close to the equilibrium potentials of the Cu/Cu2S and Cu/CuS reversible electrodes. When the potential exceeds 0.0 V (NHE), the copper oxide layer is electroformed. Pitting corrosion of copper is observed at potentials greater than −0.3 V.

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AN INVESTIGATION OF COPPER RECOVERY FROM A

2010-1-19  improvement of sulphide-oxide copper ores processing through the use of mixed collector systems has surged. The flotation of a natural porphyry copper ore with bornite and malachite was investigated via fundamental work with pure minerals and a bench-scale testing regime. The

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The Importance of pH in Flotation - 911 Metallurgist

2015-8-10  In flotation, pH control is a vital method to control selective mineral separation. A standard depressant that is used is an Alkali. An Alkali is any substance that when mixed with Acid will neutralize each other and form a new chemical

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FLOTATION OF COPPER AND NICKEL SULFIDES FROM

A method for the flotation of nickel and copper sulphide minerals from talcose bearing ores using an alkaline circuit in which at least one of the alkaline reagents is soda ash or ammonium hydroxide and following conditioning of the pulp with a collecting agent of the xanthate family to activate the nickel and copper sulphide materials, the pulp is conditioned with a flocculating agent to ...

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Interpreting the role of reagents in the flotation of ...

2009-8-26  alkaline range via the reaction of Cu2+ with surface sulphur sites to the reduced form Cu+ together with an over layer of colloidal Cu(OH)2. In the classical understanding of the activation process, the copper ions are added to the system initially to allow the adsorption of the copper ions on the surface of the sulphide minerals.

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Method of flotation of sulfide copper-zinc ores

Copper-zinc ore is enriched by the scheme of direct selective copper flotation. The ore is ground with the addition of calcium oxide to create an alkaline environment and depression of pyrite, sodium sulphide and zinc sulphate for depression zinc materials. The crushed pulp is subjected to conditioning with reagents-regulators sulfur NAT is ...

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Interpreting the role of reagents in the flotation of ...

2009-8-26  the alkaline range via the reaction of Cu2+ with surface sulphur sites to the reduced form Cu+ together with an over layer of colloidal Cu(OH) 2. In the classical understanding of the activation process, the copper ions are added to the system initially to allow the adsorption of the copper ions on the surface of the sulphide minerals.

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Enhancing flotation separation of chalcopyrite and ...

2021-3-18  Results of copper sulphide ore beneficiation test. The flotation results of copper sulfide ore are shown in Table 7. At pH 9.2, PAAS and GA were used as combined depressant and PBX as collector to ...

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EFFECTS OF EDTA ON SELECTIVE FLOTATION OF

2004-10-13  After copper activation, sphalerite electrode was conditioned in the presence of 10-3 M EDTA to remove the adsorbed copper ions from the surface (Figure 1). The anodic peak remained in the presence of EDTA under stirred conditions, confirming formation of copper sulphide rather than copper hydroxide as an end product even at pH 9.2.

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The Complete Collection of Copper Beneficiation

2020-7-1  Copper and sulfur in copper ore have strong collection properties, which is also conducive to improving the recovery of associated gold in copper sulphide ores. The flotation effect of refractory copper-sulfur ore containing secondary copper minerals is better than that with butyl xanthate, but its selectivity is worse.

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New reagents for controlling of H O by metal sulfide and ...

2021-6-12  the flotation improved recovery of fine copper particles (−10 μm) [6]. Houot and Duhamet (1992) reported that sodium sulphide depressed galena and increases selectivity of copper sulphide from other sulphides [7]. Sodium sulphite was used to improve the separation of copper-activated sphalerite from pyrite in mildly alkaline pH conditions [8 ...

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Recover - Molycop

Effective copper collector in medium acidity circuits. Can also be applied in alkaline zinc circuits. Ester Modified Xanthate (MC-C3320) Strong track record as a collector of metallic sulfide minerals. An effective collector of copper in both alkaline and acidic circuits. Also effective for the flotation of zinc in alkaline

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Atmospheric alkaline pre-oxidation of refractory

Atmospheric alkaline pre-oxidation of refractory sulphide gold ores. Creator. Rego, Alan Joseph. Publisher. University of British Columbia. Date Issued. 2018. Description. Four iron-sulphide-containing gold ores from the White Mountain mine in the Jilin Province, China were studied to examine the benefits of using oxidative treatment prior to ...

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Interpreting the role of reagents in the flotation of ...

2009-8-26  alkaline range via the reaction of Cu2+ with surface sulphur sites to the reduced form Cu+ together with an over layer of colloidal Cu(OH)2. In the classical understanding of the activation process, the copper ions are added to the system initially to allow the adsorption of the copper ions on the surface of the sulphide minerals.

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separation by flotation of copper lead zinc sulphides

28/08/1990 The depressant of the present invention improves the selective flotation separation of copper-zinc sulphide ores, copper-lead-zinc sulphidic ores, lead-zinc and copper-nickel sulphides. The LS depressants, as discussed above, are reaction products of quebracho, guar gum or dextrin with lignin sulphonate further reacted with selected ...

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The chemistry of flotation activation and depression

The activation process in acidic media is essentially an electrochemical one. Sulphide activation by Cu(II) results in a sulphur-rich copper sulphide surface. In alkaline media, activation proceeds by a surface precipitation. The quantity of copper(II) adsorbed by the sulphides depends on the solution pH, Cu(II) concentration and oxygen content.

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Oxidative weathering of a copper sulphide ore and its ...

2017-12-9  Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation S. Jacquesa,⇑, C.J. Greetb, D. Bastinc a Magotteaux Andino SA, Panamericana Norte Km. 37 S/N , Til-Til, Santiago, Chile bMinerals Processing Research, Magotteaux Australia Pty Ltd, PO Box 54, Mansfield Park, SA 5012, Australia cUniversity of Liège, Laboratory of Minerals Engineering and ...

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DE-ZINCING OF LEAD-COPPER SULPHIDE MINERALS

Typical lead-copper-zinc sulphide minerals were found hard to be separated selectively by froth flotation in the plant practice operation due to part of sphalerite was progressively entrapped into lead-copper bulk flotation. A series of de-zincing on lead-copper flotation tests has been conducted in the laboratory to reduce unwanted zinc content.

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EFFECTS OF EDTA ON SELECTIVE FLOTATION OF

2004-10-13  After copper activation, sphalerite electrode was conditioned in the presence of 10-3 M EDTA to remove the adsorbed copper ions from the surface (Figure 1). The anodic peak remained in the presence of EDTA under stirred conditions, confirming formation of copper sulphide rather than copper hydroxide as an end product even at pH 9.2.

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The Adsorption of Cu Species onto Pyrite Surface and

2016-1-17  The adsorption of Cu species onto pyrite surface and its effect on flotation were investigated by using microflotation tests, first-principle calculations, and XPS surface analysis. The results indicated that the flotation of pyrite appears to be activated with CuSO4 only at alkaline pH, while being depressed at acidic and neutral pH. The adsorption of copper ions on pyrite surface ...

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A TECHNO-ECONOMIC COMPARISON OF

problematic as these minerals are generally concentrated with the sulphide copper minerals during flotation leading to high-arsenic copper concentrates, destined for smelting. The current general industry practice is that copper smelters only accept concentrates with less than 0.2% (i.e. 2000 ppm) arsenic without payment of any

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Recover - Molycop

Effective copper collector in medium acidity circuits. Can also be applied in alkaline zinc circuits. Ester Modified Xanthate (MC-C3320) Strong track record as a collector of metallic sulfide minerals. An effective collector of copper in both alkaline and acidic circuits. Also effective for the flotation of zinc in alkaline

Read More
Atmospheric alkaline pre-oxidation of refractory

Atmospheric alkaline pre-oxidation of refractory sulphide gold ores. Creator. Rego, Alan Joseph. Publisher. University of British Columbia. Date Issued. 2018. Description. Four iron-sulphide-containing gold ores from the White Mountain mine in the Jilin Province, China were studied to examine the benefits of using oxidative treatment prior to ...

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