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use of lime copper flotation

Lime use and functionality in sulphide mineral flotation

Nov 01, 2019· Although pH control and the use of lime at high concentration may: (i) not always be sufficient to depress pyrite, and (ii) negatively affect Cu and Mo recovery, adding lime is still the most common strategy adopted in the industry, with only a few copper flotation plants adopting other solutions (e.g. intense aeration, addition of

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Lime in Flotation and Recovery Processes Graymont

Lime in Flotation and Recovery Processes Both quicklime and hydrated lime are widely used in the flotation or recovery of non-ferrous metals, including copper, zinc, nickel and lead-bearing ores. Ores, either run-of-mine, milled, autoclaved or roasted, are combined with lime and a cyanide solution.

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Lower-pH Copper Flotation Reagent System Department of

Lime produces scaling in piping and equipment, requiring the use of descaling reagents. It flocculates fine material and may occlude fine copper-sulfide particles. Lime increases the viscosity of the mineral slurry and tends to hinder aeration, slowing flotation kinetics.

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Optimization of a Copper/Molybdenum Flotation Circuit by

specific use of lime, in rougher flotation was conducted. Specifically, the goal was to determine an effective alternative to pH adjustment using lime. Experiments were conducted using the most common selection of reagents: xanthate and lime to recover copper and reject iron to establish a base test to compare other reagent schemes with.

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Modeling and Control of Lime Addition in a Flotation Process

Flotation is an important and versatile mineral processing technique that is used to separate hydrophobic materials from hydrophilic. This technique makes it pos-sible to mine complex ores that otherwise would have been regarded as uneco-nomic and non-beneficial. In this case flotation is used to separate copper from the unwanted gangue.

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LIME CONTROL METHOD FOR HIGHLY ALKALINE FLOTATION

We claim 1. A method of controlling lime additions to an alkaline flotation circuit operating on a sulfide mineral ore in order to substantially maintain a predetermined degree of alkalinity in the flotation pulp of such circuit at or above a pH of about 9, comprising continuously sensing the electrical conductivity of the flotation pulp in said circuit; continuously comparing the values of

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Copper Flotation Mineral Processing & Metallurgy

Metallurgical ContentA Copper Flotation FlowsheetCOPPER MININGCRUSHING COPPER ORECOPPER ORE STORAGEGRINDING COPPER ORECOPPER FLOTATION CIRCUITCOPPER THICKENING AND FILTERINGPROCESS CONTROLSCopper Flotation Process SummaryFlotation of Copper Ores Although basic porphyry copper flotation and metallurgy has remained virtually the

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Copper Sulfide Flotation

Copper Sulfide Flotation Circuit Beneficiation of Copper Sulfide by Flotation Copper, due to the present world demand and price, is of foremost interest to the mining industry. Many new properties are either in the process of being brought into production or are

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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 Importance of pH in Flotation

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 substance called a BASE. This is very important. The ore may be either alkaline or Acidic. To have a positive control over flotation, it is necessary to be

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lime use on copper mining AD DIFFUSION

use of lime in copper leaching Fruitful Mining Only then are the copper minerals broken free of the rest of the rock to be separated by flotation. Concentrating The slurry of water and pulverized ore is mixed with milk of lime to raise the pH and small amounts of special reagents: a frother to make bubbles, and a collector chemical that causes

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Modeling and Control of Lime Addition in a Flotation Process

Flotation is an important and versatile mineral processing technique that is used to separate hydrophobic materials from hydrophilic. This technique makes it pos-sible to mine complex ores that otherwise would have been regarded as uneco-nomic and non-beneficial. In this case flotation is used to separate copper from the unwanted gangue.

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Lime use and functionality in sulphide mineral flotation

It is common that in the copper industry lime is used as the sole depressant for pyrite, The use of seawater in the flotation of copper-molybdenum sulphide ores is becoming increasingly

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Copper Flotation Elmhurst University

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, an alcohol to strengthen the bubbles, and a

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The role of sodium sulfide in the flotation of pyrite

Apr 01, 2018· Fig. 1 shows the recoveries of chalcopyrite and pyrite as a function of flotation time in copper flotation. Lime was used to increase pH to 9.5 in flotation to depress pyrite. It can be seen that chalcopyrite was selectively floated from pyrite with about 90% chalcopyrite recovery and

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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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Froth flotation Wikipedia

Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic.This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.

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widely used copper flotation plant

Copper Flotation Chemistry Elmhurst Elmhurst College Ore Concentration by Froth Flotation The copper ore slurry from the grinding mills is mixed with milk of lime simply water and The waste material that comes out of the bottom of the tanks at the tail end of this process is called "tailings.

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Mineral processing Wikipedia

There are a number of cells able to be used for the flotation of minerals. these include flotation columns and mechanical flotation cells. The flotation columns are used for finer minerals and they typically have a higher grade and lower recovery of minerals than mechanical flotation cells. The cells in use at the moment can exceed 300 m 3

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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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MARUTI LIME-CHEM INDUSTRIES :: Uses of Lime :: Use of Lime

Lime is a key component in a number of nonferrous metal applications. Ore Concentration. Both quicklime and hydrated lime are widely used in the flotation or recovery of many non-ferrous ores--in particular copper ore flotation in which lime acts as a depressant (settling aid) and maintains proper alkalinity in the flotation circuit. In the

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minerals that increase the consumption of lime in

Jun 30, 2019· hi, and sorry for the missunderstanding, maybe my questions are wrong, i'm currently working in a model to predict lime consumption in flotation of copper ores, as function of

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Reduction of pH modifying agent in the flotation of copper

Additionally, lime by itself, or in conjunction with a sulfoxy reagent, acts to depress certain minerals. For example in complex copper/lead/zinc ores, lime with or without sulfoxy reagents acts to depress sphalerite, pyrite and pyrrhotite. A typical flow chart for a conventional flotation process using lime for pH adjustment is shown in FIG. 1.

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Method of flotation of copper molybdenum ores

The flotation method is edno-molybdenum ore, including grinding ore and collective flotation of copper and molybdenum in alkaline environment, created lime, characterized in that the collective flotation is carried out in the presence of the collector Aero-MX 3601 and the expander, then the bulk flotation concentrate after evaporation and desorption heated slurry to 40-60°With live steam in

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