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depression of pyrite in the flotation of copper ores

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Depression of pyrite in the flotation of copper ores

Thesis (PhDAppliedScience)--University of South Australia, 2006 Includes bibliographical references. One of the problems in the flotation of copper sulphide ores in moderately alkaline pH conditions is the misreporting of iron sulphide minerals into copper concentrates, which results in low copper grades. The relatively strong flotation of iron sulphides is caused by their copper activation

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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 that pH for effective pyrite depression. You also need to insure your pyrite

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The depression of pyrite in selective flotation by

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 oxygen or ferric hydroxides on pyrite surface

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Depression of pyrite in the flotation of high pyrite low

Depression of pyrite in the flotation of high pyrite low-grade lead will most likely lead to a search for more advanced solutions to the problem of beneficiation of some refractory ores in cases where conventional flotation or flocculation approaches yield poor results (Carta et al., 1980). The utility of microorganisms in mineral beneficiation has been recently elucidated. Recent

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Depression of lead-activated sphalerite by pyrite via

Complex sulfide ores are typically mixtures of various sulfide minerals like sphalerite (ZnS), chalcopyrite (CuFeS 2), galena (PbS), pyrite (FeS 2), and barite (BaSO 4) and processed by selective flotation to recover target-sulfide minerals like chalcopyrite and sphalerite.Some complex sulfide ores, however, contain anglesite (PbSO 4), a mineral with relatively high solubility, that

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Post-regrind selective depression of pyrite ResearchGate

The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to

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(PDF) A Review of the Flotation of Copper Minerals

The recovery of these copper minerals by flotation or hydrometallurgy from ores, typically containing 0.5%TCu (open pit mines) and 1-2%TCu (underground mines) is of great commercial importance

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The Adsorption of Cu Species onto Pyrite Surface and Its

Copper ions precipitate the collector and reduce the concentration of collector available for pyrite flotation and thus depress the flotation of pyrite. On the other hand, previous studies have suggested that nonactivated pyrite exhibits an excellent flotation performance at acidic and neutral pH, and the adsorption of Cu 2+ on surface S active sites does not result in the increase of

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The depression of copper-activated pyrite in flotation by

The depression of copper-activated pyrite in flotation in the presence of biopolymers was related to the adsorption amount of biopolymers on pyrite surface. The correlation between biopolymer structures and adsorption isotherms reveals that the high depression effect of DP-1775 might be due to its high molecular weight leading to a high adsorption amount. The special counterion Ca

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Sodium Metabisulfite MBS for pH Control and Pyrite

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 using Sodium Metabisulfite

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Sodium Metabisulfite MBS for pH Control and Pyrite

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 using Sodium Metabisulfite

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A study on the effect of active pyrite on flotation of

A study on the effect of active pyrite on flotation of porphyry copper ores Nahid Molaei 1, Fatemeh Sadat Hoseinian 2, Bahram Rezai 2 1 Department of Mining Engineering, Research and Science Campus, Islamic Azad University, Poonak, Hesarak Tehran, Iran 2 Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran Corresponding author:

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pH Ranges for Sequential Cu Pb Zn Flotation Separation

Copper (Chalcopyrite and others) As Lime is added and rises pH towards 12, depressed again is Iron (pyrite), followed by Zinc. ** Activated Zinc, in the Cu and/or Pb Circuit, will float like Copper. More on SEQUENTIAL FLOTATION OF SULFIDE ORES

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Copper and Pyrite Separation by Selective and Sequential

A copper-pyrite mill in Canada uses the 12-cell No. 21 “Sub-A” Flotation Machine, shown above, for roughing, and a 2-cell No. 21 “Sub-A” Flotation Machine for cleaning to produce a fairly coarse pyrite concentrate ranging from 50-62% minus 200 mesh. Feed at the rate of 230-240 tons per day comes from the tailings of a zinc flotation unit. It is introduced by gravity flow into the

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Optimisation of gold recovery by selective gold flotation

Optimisation of gold recovery by selective gold flotation 229 Depressants Calcium ions depress pyrite by physical adsorption on the mineral surface, which is negatively charged at high pH (Fuerstenau, 1982). This is not so effective when high concentrations of xanthate collector are used. Lins and Adamian (1993) establish that CaO had no significant effect on the recovery of free gold up to a

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Pyrite Depression Froth Flotation (Sulphide & Oxide

If copper is replaced by other reagents to carry out pre activation then copper consumption is reduced and hence any inadvertent activation of pyrite is eliminated leading to improved separation efficiency. That is less Fe in Zinc concentrate. Lime/ Cyanidemay be added in the Zinc cleaners to prevent pyrite flotation.

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study problems of pyrite folotation of copper sulphide ore

The nickel-copper sulphide ore used in this study was supplied by Trojan Nickel .. copper ore by flotation, Physicochemical Problems of Mineral Processing, 42, pp. Depression of pyrite in the flotation of copper ores, DPhil Theses, More details » Get Price. Developing a Bulk Circuit Suitable for Chalcopyrite-Pyrite Ores with through pyrite flotation from the tailing of the

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(PDF) Pyrite Flotation: A Review ResearchGate

Complex sulfide ores are concentrated mainly through flotation. Sulfide minerals are semiconductors, and pyrite is the major gangue mineral associated with these ores. Main interest in the

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copper flotation parameters of chalcocite ore

copper flotation parameters of chalcocite ore. MEI Blog: Flotation of chalcocite at very low pH. Aug 21, 2012 I do not know how much of this chalcocite is in the froth on the top of the the stability of the ore characteristics in relation to these parameters. Chat Now. Fundamentals for optimization of cyanide processes in flotation. pyrite, copper-zinc and polymetallic ores with the

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The depression of copper-activated pyrite in flotation by

The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to

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