Chemistry Of Pyrite Depression In Flotation

Chemistry Of Pyrite Depression In Flotation

Minerals Free Full Text Effects of Pyrite Texture on Flotation

Oct 18 2021An alternative flotation chemistry was applied on Ore B using Na2S for surface cleaning and Na Metabisulfite MBS for pyrite depression in the copper flotation stage The surface cleaning reduced the rate of oxidation of the framboidal pyrite in Ore B As a result the copper recovery could be increased to 52% Cu for Ore B and 65% for the

A study on the effect of active pyrite on flotation of porphyry copper ores

Active pyrite is one of the most undesirable phenomena in the flotation of porphyry copper ores Misreported pyrite into copper concentrates decreased the grade and recovery of copper In this study the effective parameters on the flotation process including grinding condition and chemical parameters were evaluated in order to decrease the

Kawatra Flotation Fundamentals fasracademy

The flotation machine used was a Denver laboratory scale machine with a 1 2 L flotation cell with the impeller operating at 1200 rpm Reagents The frothing reagent used was Dowfroth 200 a polypropylene glycol ether Dow Chemical Company Midland MI

Montana Tech Library Digital Commons Montana Tech

D8 Depression in Chalcopyrite Molybdenite Flotation Systems Chairperson Dr Courtney A Young The chalcopyrite molybdenite Cu Mo flotation industry is increasingly turning to organic depressants as suitable replacements for inorganic reagents such as NaHS due to environmental

Pyrite depressant useful in flotation separation Google

The present invention relates to a process for separating pyrite from sulfide ores and coal during flotation separation which comprises the depressing of pyrite with from about 0 05 to 0 75 kilograms per ton of concentrate solids using a pyrite depressant compounds selected from the group consisting of R1 R2 R3 N sup O sub 2 H sub 4 SR4X sup

Effects of Process Parameters on Selective Flotation of Lead CORE

flotation separation by depression of zinc bearing minerals using a combination of sodium cyanide and zinc sulphate as depressant and flotation of lead minerals using potassium ethyl xanthate as collector and methyl iso butyl carbinol MIBC as frother Lime was used as pH regulator and this also helped in depression of pyrite

The depression of pyrite in selective flotation by different reagent

Janetski et al 1977 studied the depression of pyrite flotation from an electrochemical viewpoint and found that an increase in pH facilitated pyrite oxidation It was suggested that oxidation of pyrite replaced oxidation of xanthate as the dominant anodic process Thus the formation of dixanthogen is inhibited at high pH

The depression of pyrite in selective flotation by different reagent

2024 Depression of pyrite observed below pH 2 is due to decom position of xanthate while the depression above pH 11 is due to the thermodynamic instability of dixanthogen and the formation of ferric hydroxide islands on pyrite surface Leppinen 1990; Fuerstenau et al 2024 While it is clear that ﬂotation or depres

The depression of quartz in sulphide flotation Missouri University of

hence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite quartz mixture Flotation of any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid l4 that flotation is not 14 Wark I i Principles of Flotation

Reverse Flotation IntechOpen

The depression of pyrite in selective flotation by different reagent systems A literature review Minerals Engineering 2024; 96 97 143 156 DOI 10 1016/j mineng 2024 06 018 Wang XH Parekh BK Leonard JW The surface and solution chemistry of pyrite flotation with xanthate in the presence of iron ions Colloids and Surfaces A

Pyrite Depressant Froth Flotation Sulphide & Oxide Metallurgist

Can be used at a slightly elevated pH 9 It is a common approach in copper flotation If promoter floats pyrite badly it floats badly other sulfides too For example if you replace the butyl xanthate to thionocarbamate recovery of pyrite will decrease by 10% and the recovery of chalcopyrite will decrease by 5%

The solution electrochemistry of sulfide xanthate cyanide systems in

1996 English In Minerals Engineering ISSN 0892 6875 E ISSN 1872 9444 Vol 9 no 5 p 527 546 Article in journal Refereed Published Abstract [en] Extensive thermodynamic calculations have been performed for a number of flotation systems of metal sulfide minerals using cyanide as a depressant to investigate the physicochemical principles underlying the effective depression processes

Surface Chemical Studies on Pyrite in the Presence of PubMed

The interaction of dextrin and guar gum with pyrite has been investigated through adsorption flotation and electrokinetic measurements The adsorption densities of the polysaccharides onto pyrite reveal a region of higher adsorption density in the pH range 7 5 11 with a maximum around pH 10 for b …

Surface Chemistry and Rheology of Pittsburgh No 8 Coal Water Slurry in

To understand the effect of these reagents on the depression of pyrite during coal flotation both the surface chemistry and the rheology of coal pyrite systems must be studied This paper summarizes the results of flotation tests at a 200 mesh of grind of Pittsburgh No 8 coal using TEPA reagent for pyrite depression

Yongjun Peng 0000 0001 9398 3963 ORCID

Starch chemical modification for selective flotation of copper sulphide minerals from carbonaceous material A critical review Electrochemical and spectroscopic studies of pyrite cyanide interactions in relation to the depression of pyrite flotation Minerals Engineering 2024 06 The mechanism of pyrite depression at acidic pH by

Surface chemistry of activation of lime depressed pyrite in flotation

The depression of pyrite by lime is attributed to the surface formation of Ca OH 2 CaSO4 and Fe OH 3 as determined by XPS analysis Xanthate flotation tests show that oxalic acid and other

Flotation S Komar Kawatra

Eisele T C and Kawatra S K Depression of Pyrite Flotation by Microorganisms as a The Role of Nonpolar Oils as Flotation Reagents Chapter 19 Chemical Reagents in the Mineral Processing Industry Malhotra and Riggs eds Society of

Pyrite Depression Froth Flotation Sulphide & Oxide Metallurgist

Cyanide is used in the lead circuit to depress both sphalerite and pyrite From the lead tail we have to recover sphalerite depressing pyrite Now we use copper sulphate to activate cyanide depressed sphalerite while doing so we must ensure that pyrite is not activated Copper added to lead tails has to do two functions

THERMODYNAMIC MODELS FOR DEPRESSION OF PYRITE BY LIME lN COPPER ANO

Flotation of copper or zinc sulphides by depression of the iron sulphides in selective ore t1otation or in separation of bulk copper pyrite or zinc pyrite concentrales is realized as usual in alkaline medium created with lime Ahramov 1983 But the maximum recovery of coppcr or zinc into concentrates of high

Research Development of Depression and Activation Separation of Pyrite

At present the main process of flotation of nonferrous metal sulfide ores containing pyrite is to first recover other useful metal minerals with the inhibition of pyrite and then activate and collect pyrite However due to the crystal defects and the difference in the chemical composition of pyrite and the diversity and complexity of the

pyrite flotation conducted

The depression of pyrite in selective flotation by Oct 01 2024· A study conducted by Mu et al 2024 demonstrated that three lignosulfonate based biopolymers DP 1775 DP 1777 and DP 1778 differing in molecular weight and polymer chemistry depressed the flotation of un activated pyrite at pH 5 copper activated pyrite at pH 9 and

The upgrading of low grade nickel ore stockpiles at Western Areas Ltd

Flotation launder design and the measurement of critical fro Understanding minerals in mineral processing the basics an How to find the optimum air rate for flotation cells Pyrite depression at Boliden Tara using F 250 a biopolymer High shear rotor trials in the Mount Isa Mines Copper Concen

An Overview of Technologies and Selective Depressing Agents for

Preferential flotation of talc before the flotation of chalcopyrite [1] Using frothing agents with good selectivity to float some parts of talc before the flotation of sulfide minerals can reduce the interference of talc to the chalcopyrite flotation 3 Selective Depressing Agents

A Brief Review of Auriferous Sulphide Flotation Concentration; Pyrite

3 Separation of Pyrite and Arsenopyrite 3 1 Pulp Chemistry Control Pulp pH is one of the most significant parameters in deciding the flotability and selectivity of sulphides López Valdivieso et al 2024 For both pyrite and arsenopyrite high flotation recoveries are achieved under acidic pH conditions proposed to be as a result

Alternatives For Sodium Cyanide For Flotation Control October 1981 EPA

Key words which were used in the broadly defined search were the following flotation ore treatment chalcocite chalcopyrite sphalerite galena pyrite and depress A total of 38 articles relevant to the topic of pyrite depression were identified in the computer search

Flotation of Sphalerite and Pyrite in The Presence of Sodium Scribd

Table 1 Chemical composition of sphalerite and pyrite samples Mineral Element Zn Sphalerite ZnS Elmwood mine Tennessee Pyrite FeS 2 Huanzala Peru 64 9 50 ppm infrared and XPS spectroscopic studies have shown that the selective depression of the flotation of pyrite with sodium sulfite is the result of an increased oxidation of the

Pyrite Depression in Copper Flotation Mineral Processing & Metallurgy

In froth flotation depressing pyrite or any metal is impossible if minerals are locked Effective grinds liberation and good pH targeting will let you effectively depress pyrite Generally the higher you raise the pH the less floatable sulphides become pH control and pyrite depression/rejection in a poly metallic environment is different

Canyon lake boat ramp 3 swtvv tortownicajagoda pl

man jumps off ben franklin bridge 2024; whatsapp terminal download lock my device google queen of wands and queen of pentacles; domain power users hinge catfish whatsapp endo aesthetics; safe harbor marinas glassdoor scripps early decision acceptance rate neutralizing agent examples; hippie hill san francisco history karma luck tree of life how to sand without sandpaper

Central South University

ANG et al [14] used oxidizing agents such as sodium hypochlorite and hydrogen peroxide to activate the flotation of cyanide depressed pyrite The activation mechanism was attributed to the oxidation of cyanide to cyanate which eliminated the depression effect of cyanide on pyrite flotation R

Pyrite Oxidation And Its Control Amd Molecular Oxidation Mechanisms

PlantsControl of Pyrite Surface Chemistry in Physical Coal Cleaning Technical Progress Report for the Ninth Quarter September 1 November 30 combustor retrofits The separation of pyrite from coal by flotation is based on exploiting the wettability difference between coal and pyrite There is evidence that the wettability of