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How to depress pyrite mineral in floatation of copper ore

Apr 12, 2021

Jan 26, 2021 Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu 2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0

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  • The depression of pyrite in selective flotation by
    The depression of pyrite in selective flotation by

    The use of quebracho extract as a pyrite depressing agent to improve Cu/Fe ratio in copper minerals flotation was studied. The depressing effect in the case of pure pyrite, pure chalcopyrite and a sample of disseminated copper ore was tested considering different pH values and modifiers, and different levels of tannin addition

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  • The depression of copper-activated pyrite in flotation by
    The depression of copper-activated pyrite in flotation by

    Oct 01, 2016 1. Introduction. Pyrite (FeS 2), the most abundant sulfide mineral, is undesirably associated with minerals of economic value such as chalcopyrite, sphalerite and galena (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).To produce and utilize the valuable components, selective depression of pyrite in differential flotation is

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  • US20110155651A1 - Separation of copper minerals from
    US20110155651A1 - Separation of copper minerals from

    In other words, a large amount of lime is necessary to alter and maintain the pH at the optimal operating conditions. The addition of lime can also depress the flotation of minerals such as chalcopyrite, sphalerite, molybdenite, pyrite, pyrrhotite, and gold and other precious metals via the deposition of calcium on the metal surface

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  • (PDF) Role of starch and metabisuphite on pure pyrite and
    (PDF) Role of starch and metabisuphite on pure pyrite and

    This paper investigates the role of non-toxic depressants on the flotation of pyrite. Starch and meta bisulphite were used as a depressant for pure pyrite sample and a

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  • Study of Flotation Parameters for Copper Recovery from
    Study of Flotation Parameters for Copper Recovery from

    Keywords: Refractory Copper-pyrite Ores, Flotation, Tennantite, Arsenic, Recovery 1.Introduction The treatment processes for the beneficiation of copper-pyrite ores consisting of tennantite-tetrahedrite series minerals along with chalcopyrite, pyrite and sphalerite are generally complex. Tetrahedrite-tennantite minerals

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  • (PDF) A Review of the Flotation of Copper Minerals
    (PDF) A Review of the Flotation of Copper Minerals

    Flotation of sulphidic and oxidic copper minerals is reviewed, with particular reference to previous studies of refractory copper ore flotation. Principle of

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  • Copper-Zinc ores - Danafloat
    Copper-Zinc ores - Danafloat

    The copper flotation tailings are the feed to the sphalerite flotation circuit where the zinc minerals are floated as explained in the lead-zinc flotation section. Sphalerite is first activated with CuSO4 and floated typically at elevated pH for iron sulphide depression. Combinations of xanthate with either dithiophosphate and/or

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  • Enhancing flotation separation of chalcopyrite and
    Enhancing flotation separation of chalcopyrite and

    Mar 18, 2021 As for the talc type Copper-Nickel Sulfide Ores, the talc entrained in flotation concentrate with foam will affect the grade of copper sulfide ore, so gum Arabic (GA) is a good depressant to

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  • Mineral Flotation - International Mining
    Mineral Flotation - International Mining

    Nov 01, 2011 Mineral species such as talc, carbon and carbon associated minerals, such as carbonaceous pyrite, can all be difficult to depress in a flotation circuit. On the other hand, floating them off in a prefloat circuit before the rougher is an easier way to handle them

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  • Chapter 7 Electrochemical Control of Pyrite-Activation
    Chapter 7 Electrochemical Control of Pyrite-Activation

    Pyrite, like a number of other sulfides, may be activated for more efficient flotation by interaction with dissolved heavy metals ions, e.g., Cu2+. Activation may be accomplished intentionally for the purpose of floating pyrite from other minerals, or it can occur inadvertently when the ore is

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  • SHENYANG FLORREA CHEMICALS CO., LTD_thionocarbamate
    SHENYANG FLORREA CHEMICALS CO., LTD_thionocarbamate

    used as a flotation depressant to depress Sphalerite and pyrite in the flotation of Pb/Zn, Cu/Zn, and Cu/Pb/Zn ores. Florrea D113: sodium bisulphite: Florrea D114: sodium etabisulphite: can be used in conjunction with either lime or Na2S for depression of pyrite during flotation of copper-zinc ores

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  • Effect of bacterial conditioning and the flotation of
    Effect of bacterial conditioning and the flotation of

    copper grade increase of about 22% in flotation copper ore through bacterial conditioning of pyrite surfaces resulting in pyrite depression. Key words: Chalcopyrite, bio-oxidation, bacteria, mineral surface, froth flotation. INTRODUCTION Acidothiobacillus ferrooxidans is an aerobic, acidophilic, rod-shaped, autotrophic, gram-negative bacterium

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  • Separation of chalcopyrite and pyrite from a copper
    Separation of chalcopyrite and pyrite from a copper

    Sep 01, 2018 For the copper tailings, the objective of the flotation is to detach the copper minerals from other sulfide minerals (usually pyrite) and the gangue minerals. The main difficulty lies in the depression of pyrite, which conventionally proceeds in high pH conditions by using large amounts of lime (CaO)

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  • Depression of pyrite in the flotation of high pyrite low
    Depression of pyrite in the flotation of high pyrite low

    Test results indicated the copper grade increase of about 22% in flotation copper ore through bacterial conditioning of pyrite surfaces resulting in pyrite depression. View Show abstract

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  • Copper Flotation - Elmhurst University
    Copper Flotation - Elmhurst University

    Remember that only 0.67% of the ore is copper. The copper minerals and waste rock are separated at the mill using froth flotation. The copper ore slurry from the grinding mills is mixed with milk of lime (simply water and ground-up limestone) to give a basic pH, pine oil (yes, it comes from trees -- a by-product of paper mills) to make bubbles

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  • Method of floatation of copper-zinc-pyrite ore (versions)
    Method of floatation of copper-zinc-pyrite ore (versions)

    1. Method of flotation of copper-zinc-pyrite ore, including grinding in an alkaline medium, air conditioning with reagents - collectors and frothers, collective copper-zinc flotation to produce collective concentrate containing copper minerals and natural-activated sphalerite, and tails, characterized in that as the collector used is supplied in the following sequence composition

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  • Copper-Molybdenum ores - Danafloat
    Copper-Molybdenum ores - Danafloat

    Recovery of copper is by standard flotation reagents identified in the copper ore flotation description. Molybdenum will float naturally with the copper but can be crowded in the froth by the copper mineralization and use of a moly collector (such as diesel oil, kerosene, refined oils, pine oil or xanthate ester) enhances its floatability

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  • A study on selective flotation in low and high pyritic
    A study on selective flotation in low and high pyritic

    impact of pyrite on copper flotation. [27–30] It has been ... than 11 are essential to extensively depress pyrite in the presence of xanthate collectors. ... mineral in the ore. According to the

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  • Copper ores - Danafloat
    Copper ores - Danafloat

    Effective flotation collector reagent selection is dependent on the sulphide minerals present, their mineral associations in the ore, and circuit characteristics. Because an ore typically has more than one copper sulphide mineral type, often a combination of sulphide flotation collectors is used to maximize metallurgical performance

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  • ROLE OF STARCH AND METABISUPHITE ON PURE
    ROLE OF STARCH AND METABISUPHITE ON PURE

    Role of starch and metabisulphite on pure pyrite and pyritic copper ore flotation 43 occurred with 1.7 mg/ dm3, while 21% depression occurred with the same dosages of starch at pH 6.5 where pyrite flotation is expected to be weak at pH 10

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  • Pyrite Depression in Copper Flotation
    Pyrite Depression in Copper Flotation

    Oct 08, 2015 Pyrite Depression in Copper Flotation. 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 curve. The more flotation collector you have on, the higher you will need to increase

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  • Pyrite Depressant on copper ore - Froth Flotation
    Pyrite Depressant on copper ore - Froth Flotation

    pH plays a major role in process. Before changing parameters confirm from lab tests different pH Vs Recovery and grade and then fix the parameters. In plant practice actual pH will be very nearer to it. Even high pH depress copper. Keep minimum pH and try NaCN. Even at low pH NaCN depress pyrite. You try 1st in lab and then try in plant

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  • Pyrite Depressant - Froth Flotation (Sulphide & Oxide
    Pyrite Depressant - Froth Flotation (Sulphide & Oxide

    I experienced a copper-gold massive ore type where thionocarbamate seemed to work better. Also, SMBS is a common pyrite depressant. Dithionocarbamates are very selective in copper flotation. It will not float pyrite. Can be used at a slightly elevated pH (9). It is a common approach in copper flotation

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  • The depression of copper-activated pyrite in
    The depression of copper-activated pyrite in

    In response to the high pyrite recovery in copper flotation using seawater, this study investigated the role of sodium metabisulphite (MBS), a widely used pyrite depressant, in depressing the

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  • Copper Flotation - Mineral Processing & Metallurgy
    Copper Flotation - Mineral Processing & Metallurgy

    May 16, 2016 When pyrite is present, lime performs the additional function of a depressor, the amount used being balanced against that of the promoter—that is, no more lime should be added than is required to prevent the bulk of the pyrite from floating, as any excess tends to depress the copper minerals, and no more of the promoter should be employed than is needed to

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  • Chalcopyrite (Cu) Sphalerite (Zn) Separation by
    Chalcopyrite (Cu) Sphalerite (Zn) Separation by

    Apr 14, 2016 BALL MILL GRINDING. Grinding the washed rod mill discharge to approximately 90% minus 200 mesh was necessary to get fairly good liberation of the copper and zinc from the bulk of the pyrite. Lime was added to the ball mill to give a

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  • Gold-Pyrite ores - Danafloat
    Gold-Pyrite ores - Danafloat

    Natural pH is recommended for gold flotation. Alternatively using soda ash for pH adjustment can reduce gold depression. Where gold is associated with pyrite in base metal ores where iron sulphides are depressed and report to the tailings, a separate tailings pyrite flotation concentrate should be considered

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