how to depress pyrite mineral in floatation of copper ore

how to depress pyrite mineral in floatation of copper ore

Jun 01, 2016 · Pyrite is usually depressed during the flotation of sulfide minerals by the use of a depressant [4, 7], pulp-environment management [8,9], and grinding-environment changes [10,11]

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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

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 give a profitable recovery of the valuable minerals …

pyrite depressant on copper ore - froth flotation

pyrite depressant on copper ore - froth flotation

Am looking at what can be used to depress pyrite in sulphide ore without affecting copper recovery greatly. Am currently undertaking a project on the depression of pyrite, am trying to use aeration and milling at high pH and its proving to work but at the expense of copper recovery

pyrite depression in copper flotation

pyrite depression in copper flotation

Oct 08, 2015 · 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 and copper minerals are well liberated for good chemical separation by pH. In froth flotation, depressing pyrite or any metal is impossible if minerals are locked

copper lead concentrate separation

copper lead concentrate separation

Oct 01, 2015 · The lead-copper concentrate is cleaned if necessary, diluted to a suitable pulp density, and treated in a conditioner with sodium cyanide in sufficient strength to depress the copper minerals, the galena remaining unaffected, and with enough soda ash to make the pulp distinctly alkaline; a pH value of 9.0-10.0 is usual. The pulp then passes to a flotation machine where a lead concentrate more or less free from copper …

lime use and functionality in sulphide mineral flotation

lime use and functionality in sulphide mineral flotation

Nov 01, 2019 · Lime can be added to depress pyrite, with both the hydroxyl and calcium ions contributing to the formation of hydrophilic precipitates on the pyrite surface, but higher flotation pH is needed when pyrite is copper activated (pH > 11.5), thereby imposing a high lime consumption

selectively depress copper-activated pyrite in copper

selectively depress copper-activated pyrite in copper

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. Electrochemical measurements revealed that the presence of Cu2+ and

the depression of copper-activated pyrite in flotation by

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

how to separate copper from lead by cu depression

how to separate copper from lead by cu depression

Apr 16, 2015 · To achieve this copper/lead separation, bulk flotation is performed with depressants to control sphalerite and pyrite. Cyanide was used in the bulk rougher as it will also be used in the reverse. Rougher testing indicated that 10 to 50 g/tonne cyanide in the bulk rougher was sufficient

pyrite depression - froth flotation (sulphide & oxide

pyrite depression - froth flotation (sulphide & oxide

PYRITE DEPRESSION: I agree with you. But as per my experience pH play a major role in flotation. Different minerals behave differently at different pH. Lead is floated at low pH. 8 or 9. In cleaner cells pH >9. Cyanide consumption will be less if pH is controlled using instruments and PLC. Pyrite floats at very low pH or gets entrapped during

copper-lead-zinc ores

copper-lead-zinc ores

This flotation step is conducted at alkaline pH. In the case where galena is floated and the copper minerals are depressed, copper depression can be achieved by using sodium sulphide, hydrosulfite, lime, cyanide, zinc-cyanide and/or ferricyanide complexes. Selection of flotation reagents and frothers is an important, even critical, consideration

a review of the fundamental studies of the copper

a review of the fundamental studies of the copper

A review of the considerable, but often contradictory, literature examining the specific surface reactions associated with copper adsorption onto the common metal sulfide minerals sphalerite, (Zn,Fe)S, and pyrite (FeS(2)), and the effect of the co-location of the two minerals is presented. Copper "a …

(pdf) bulk flotation of complex copper ore | khmer lee

(pdf) bulk flotation of complex copper ore | khmer lee

2 There are two common options practiced in the treatment of these ores. These are (1) sequential copper flotation from pyrite and other sulfides, the most common practice in the treatment of sulfides ores and (2) bulk or semi-bulk flotation followed by copper– pyrite …

the influence of frother type on the flotation kinetics of

the influence of frother type on the flotation kinetics of

Jan 01, 1990 · Minerals Engi,eering. Vol. 3. No. 6. pp. 637-640. 1990 0892-6875/90 $3.00 + 00 Printed in Great Britain 1990 Pergamon Press pie TECHNICAL NOTE THE INFLUENCE OF FROTHER TYPE ON THE FLOTATION KINETICS OF A MASSIVE COPPER SULPHIDE ORE (~. ... Solid lime was added in the mill to depress pyrite in flotation. Flotation tests were conducted in a Wedag

depression of pyrite in the flotation of high pyrite low

depression of pyrite in the flotation of high pyrite low

Jan 01, 2010 · In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these …

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