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Depression In Copper Flotation

  • Hydrosulphide Depression of Copper-sulphide Minerals
    Hydrosulphide Depression of Copper-sulphide Minerals

    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

  • Selective depression effect in flotation separation of
    Selective depression effect in flotation separation of

    Selective depression effect in flotation separation of copper−molybdenum sulfides using 2,3-disulfanylbutanedioic acid Ming-yang LI 1, De-zhou WEI 1, Yan-bai SHEN , Wen-gang LIU , Shu-ling GAO , Guang-quan LIANG1,2 1. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; 2

  • Optimization of a Copper/Molybdenum Flotation
    Optimization of a Copper/Molybdenum Flotation

    Optimization of a Copper/Molybdenum Flotation Circuit by Depressing Pyrite from ... copper and reject iron to establish a base test to compare other reagent schemes with. ... Depression of Pyrite----- 6 Analytical Method-----10

  • Potential-Controlled Flotation and Depression of Copper
    Potential-Controlled Flotation and Depression of Copper

    Jul 18, 2013 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

  • [PDF] Selective depression effect in flotation separation
    [PDF] Selective depression effect in flotation separation

    Sep 01, 2015 Abstract 2,3-disulfanylbutanedioic acid (DMSA) was found to be a selective depressant in the flotation separation of copper– molybdenum sulfides. The flotation results suggest that a low dosage of DMSA has a strong depression effect on chalcopyrite in the pH range between 4 and 12. At pH 6, the recoveries of molybdenum are up to 85%, 75%, and

  • Pyrite depression by dextrin in flotation with xanthates
    Pyrite depression by dextrin in flotation with xanthates

    depressant in copper flotation plants using sea water where high pH is unpractical because of the high amount of lime that it would be required (Castro, 2012). Dextrins are commercially used for depression of carbonaceous pyrite in copper flotation, depression of lead in lead-copper bulk separation (Bulatovic

  • Physico-chemical models for activation, flotation and
    Physico-chemical models for activation, flotation and

    As the result of theoretical and experimental investigations in laboratory and industrial scale physico-chemical models for optimal conditions of copper and iron sulphides activation flotation and depression have been derived, varied, and proven

  • Flotation experiment research on a polymetallic sulfide
    Flotation experiment research on a polymetallic sulfide

    selectively with depression of zinc and iron, followed by reflotation of the copper-lead tailing for recovery of zinc[9]. The polymetallic separation flowsheet of copper/lead bulk flotation–copper lead separation–priority floating zinc and pyrite from the bulk flotation tailings was used based on the ore properties

  • 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

  • Enhancing flotation separation of chalcopyrite and
    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

  • DEPRESSION OF COPPER AND IRON SULFIDES IN
    DEPRESSION OF COPPER AND IRON SULFIDES IN

    The Nokes depression scheme described in U.S. Pat. No. 2,811,255 consists of conditioning a slurry comprising copper-containing and molybdenum-containing minerals, (“a CuMo slurry”) with Nokes Reagent (Sodium Dithiophosphate or Sodium Dithioarsenate) followed by multiple steps of flotation until an acceptable Molybdenite concentrate is

  • The depression of molybdenite flotation by sodium
    The depression of molybdenite flotation by sodium

    Jul 01, 2021 Abstract Sodium metabisulfite (MBS) has been widely applied to depress pyrite in copper-molybdenum flotation plants in particular when seawater is used as the main water resource. However, whether MBS depresses molybdenite flotation is unknown. In this study, the flotation of molybdenite at 106 and 53 m was carried out in the absence and presence of

  • Flotation Optimisers to Increase Recovery and Grade
    Flotation Optimisers to Increase Recovery and Grade

    Flotation Optimisers and Depressants. Pionera F-Range of biopolymers consists of selective depressants and flotation optimisers for a broad range of gangue minerals in mineral beneficiation processes. They can offer a significant economic advantage in the flotation of minerals by reducing smelter penalties, increasing grades and recovery of

  • Optimization of Chalcopyrite Froth Flotation Process by
    Optimization of Chalcopyrite Froth Flotation Process by

    The particle size of the particle and the froth stability, viscosity and pulp density during the process relevant factors during the process in the copper concentration process by flotation [2-5] Generally, flocculants and peptizes during flotation are applied to allow clays to be included into the pulp in suspended form. This reagent can

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

    The depression was associated with the copper(I)-biopolymer complex formed on pyrite surface which enhanced the oxidation of copper(I) and inhibited xanthate adsorption. While the molecular weight

  • Selectively Depress Copper-Activated Pyrite in
    Selectively Depress Copper-Activated Pyrite in

    Jan 26, 2021 Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ 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

  • Depression of pyrite in porphyry copper flotation
    Depression of pyrite in porphyry copper flotation

    Depression of pyrite in porphyry copper flotation Ian Wark Research Institute Australian Research Council Special Research Centre For Particle and Material Interfaces M. Zanin and S. Farrokhpay Case Study

  • Selective depression of talc in chalcopyrite flotation
    Selective depression of talc in chalcopyrite flotation

    Sep 05, 2020 This study aims to introduce xanthan gum as a favorable selective depressant for talc depression in sulfide copper flotation. As chalcopyrite is a crucial industrial mineral and a vital constituent of high-quality copper mines , it was chosen to be on behalf of sulfide copper minerals. Micro-flotation experiments on single minerals as well as artificial mixtures and real

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

    Oct 01, 2016 The mechanism underpinning the depression role of lignosulfonate-based biopolymers on the flotation of un-activated pyrite and copper-activated pyrite has been investigated. In the flotation of un-activated pyrite at pH 5, dixanthogen is the main species responsible for pyrite flotation, the formation of which is accompanied by the reduction of

  • (PDF) Effect of different depressants on galena
    (PDF) Effect of different depressants on galena

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

  • 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 thionocarbamate are used in combination with

  • Sodium Metabisulfite MBS for pH Control and Pyrite
    Sodium Metabisulfite MBS for pH Control and Pyrite

    Aug 07, 2013 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 iron/pyrite depression

  • Minerals | Free Full-Text | Derivation of Flotation
    Minerals | Free Full-Text | Derivation of Flotation

    Nov 18, 2020 In this study, we focused on the activation and depression by NaHS, a well-known activator and depressant of copper minerals. The flotation results showed that there can be a threshold NaHS dosage to activate the mineral surfaces, as evidenced by the depression of the minerals and reduction of recoveries at higher dosages of NaHS

  • Selectively Depress Copper-Activated Pyrite in Copper
    Selectively Depress Copper-Activated Pyrite in Copper

    Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I

  • MECHANISM OF SPHALERITE DEPRESSION IN AN OPEN
    MECHANISM OF SPHALERITE DEPRESSION IN AN OPEN

    transferred into a 4.3 L flotation cell, conditioned with lime (1100g/t), the collector 3418A (30g/t in total) and frother MIBC (70 L). Each reagent was conditioned for 0.5 minutes, for the flotation, the air flow was set at 2.4L/min and pH was maintained at 10.5. The total rougher copper flotation time was 7.5min

  • OPTIMIZATION OF FLOTATION PARAMETERS FOR
    OPTIMIZATION OF FLOTATION PARAMETERS FOR

    higher pH values caused depression of molybdenite too (Castro and Bobadilla, 1995). In this study, the determination of the flotation behavior of a molybdenum ore was investigated testing different particle sizes, pH values, types and amounts of collector, and frother. With the optimized flotation parameters, copper depression was examined

  • The Adsorption of Cu Species onto Pyrite Surface and Its
    The Adsorption of Cu Species onto Pyrite Surface and Its

    Jan 17, 2016 Due to the low adsorption of copper ions on pyrite surface at acidic and neutral pH, there is a high concentration of copper ions in solution. These copper ions precipitate with the collector KBX prior to adsorption and reduce the available KBX for flotation, which causes the depression of pyrite. 3.3. First-Principle Calculations

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

    Flotation is conducted at high pH levels often times greater than 11 using lime to ensure good depression of sulphide minerals, particularly iron sulphides and copper. Other depressants used include cyanide and Nokes reagent (thiophosphorous or thioarsenic compounds)

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

    Depression of pyrite is very important in sulphide ore flotation. 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 pyritic copper

  • Depression of copper and iron sulfides in molybdenite
    Depression of copper and iron sulfides in molybdenite

    The Nokes depression scheme described in U.S. Pat. No. 2,811,255 consists of conditioning a slurry comprising copper-containing and molybdenum-containing minerals, (“a CuMo slurry”) with Nokes Reagent (Sodium Dithiophosphate or Sodium Dithioarsenate) followed by multiple steps of flotation until an acceptable Molybdenite concentrate is

  • The Potential of Modified Starches as Mineral Flotation
    The Potential of Modified Starches as Mineral Flotation

    Jan 18, 2021 Flotation. Figures 1 and 2 present lab scale batch flotation results from two separate studies, focusing on graphite and copper-activated pyrite, respectively. In Fig. 1, the baseline graphite recovery where no starch is used yields a recovery of 93.9 0.5%.This decreases slightly to 82.3 4.3% for NWS dosed at the lowest depressant dose of 120 g/t

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