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Depression of pyrite in the flotation of high pyrite low

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 bacteria using the optimum dosage of reagents Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by Get price Get Price

Role of surface chemistry of fine sulphides in their

The physico-chemical behaviour of sulphides is further complicated for complex sulphides when and pyrite 2 0-ISO JAm) do not problem has received more attention in the area of non- suggest any correlation for either the maximum or flotation of the 8SOfo -44-jlm feed is in the Get price Get Price

Surface Oxidation of Pyrite as a Function of pH

Pyrite the most abundant metal sulfide at the surface of Earth plays a key role in many processes such as acid mine drainage redox cycling of metals at oxic-anoxic boundaries of lake bottom and degradation of pollutants The oxidation of pyrite was studied in batch experiments over a large range of pH (2 5−12) with trace oxygen Surface analysis of the samples was performed using X-ray Get price Get Price

Pyrite depression by phosphates in coal flotation

The selective depression of pyrite from the Kentucky No 9 coal seam was systematically examined using various kinds of inorganic and organic chemicals Most of the organic chemicals tested showed little selectivity in pyrite depression It was found that both orthophosphate and pyrophosphate were effective for the selective depression of coal pyrite in coal flotation using fuel oil as a Get price Get Price

Solution Chemistry of Sodium Silicate and Implications for

The solution chemistry of sodium silicate and implications for pyrite flotation have been studied In addition to flotation and sedimentation tests electrophoresis inductively coupled plasma (ICP) tests and X-ray photoelectron spectroscopy (XPS) have been used The flotation and sedimentation results show that lizardite causes problems in the flotation of pyrite by adhering to the pyrite Get price Get Price

The depression of pyrite in selective flotation by

Its flotation can also be enhanced by the activation of copper or lead ions emanating from other minerals Depressants are generally required to selectively depress pyrite In this article a comprehensive review of the fundamental studies of depression mechanisms and effectiveness of commonly used reagent systems to depress pyrite is presented Get price Get Price

Surface chemical studies on pyrite in the presence of

The pH range for higher adsorption significant co-precipitation and appreciable depression of pyrite encompass each other XPS and FTIR spectroscopic studies provide evidence in support of chemical interaction between hydroxylated pyrite and the hydroxyl groups of Get price Get Price

Gold Pyrite Froth Flotation Separation

Chemistry of pyrite depression in flotation 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 chalcopyritecopper you need to b morethere will Flotation Separation Of Arsenopyrite From Get price Get Price

Flotation

Froth flotation is the follow-on operation after comminution and classification in the process of liberating and separating minerals by exploiting the differences in physical properties of the different minerals that make up an ore Froth flotation is achieved when particles are Get price Get Price

depression carbonate depression in flotation

ONE CONTACT US depression carbonate depression in flotation For more than 30 years ONE has focused on RD and manufacturing of mine crushing equipment building crushing equipment industrial pulverizing equipment and green building materials equipment and provided professional solutions and mature supporting products to create value Get price Get Price

MEI Blog Flotation Chemistry vs Flotation Physics

Mar 06 2017Flotation Chemistry vs Flotation Physics for example Cytec has developed polymeric reagents for gangue depression but I haven't seen much academic research in this area Commenced in the 80s at Broken Hill on Lead/silver/zinc developed flotation for gold/pyrite ores mineral sands magnesite graphite and chalcopyrite from galena Get price Get Price

The role of sodium metabisulphite in depressing pyrite in

Abstract In response to the high pyrite recovery in copper flotation using seawater this study investigated the role of sodium metabisulphite (MBS) a widely used pyrite depressant in depressing the flotation of copper-activated pyrite to identify a solution to maximising pyrite rejection Get price Get Price

Depression of pyrite in the flotation of high pyrite low

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 bacteria using the optimum dosage of reagents Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by Get price Get Price

CiteSeerX — Surface Chemical Studies on Pyrite in the

CiteSeerX - Document Details (Isaac Councill Lee Giles Pradeep Teregowda) 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 both polymers Get price Get Price

Effect of redox conditions and copper ions on pyrite

Redox conditions and chemical reactions involved in depression mechanisms of pyrite by MBS or sodium sulfite in seawater are investigated and discussed based on the acidifying effect of MBS oxidation of sulfite ions by dissolved oxygen and the role of catalyst of some metal cations (e g copper ions) adsorbed on pyrite's surface Get price Get Price

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Above pH 11 the surface of pyrite is of ferric hydroxide (Fe(OH) 3) a hydrophilic compound Calcium ion contributed by lime in pH adjustment also adds to pyrite depression Flotation is affected about one pH unit lower if CaO is used for raising pH compared with KOH or K 2 CO 3 The pzc for pyrite is at pH = 6 9 Get price Get Price

Minerals

The flotation chemistry between pyrite and isomeric xanthates (butyl xanthate and isobutyl xanthate) was investigated by means of adsorption experiments surface tension tests and molecular dynamic simulations in this work The flotation chemical results were confirmed and further interpreted by quantum chemical calculations Get price Get Price

Depressants for Pyrite / Flotation depressants

Pyrite depression The efficiency of PIONERA BioPolymer versus sodium cyanide in copper recovery PIONERA BioPolymers can offer a significant economic advantage in flotation of iron/sulfur bearing minerals in reducing smelter penalties increasing grade and recovery of metallic concentrates Get price Get Price

The Depression of Sphalerite during Carbon Pre

during pre-flotation significantly reduced the bulk flotation action and entrainment of sphalerite in the froth (b) grinding the ore finer (P 80 = 40 m) reduced the recovery of sphalerite as composite particles during lead flotation and (c) the pulp pH was Get price Get Price

PDF Flotation and depression control of arsenopyrite

flotation separation arsenopyrite Flotation separation Flotation is the most widely used method for the concentration of finegrained minerals It takes advantage of the different physicochemical surface properties of mineralsin particular their wettability which can be a natural property or one artificially changed by chemical reagents More Detail Get price Get Price

Mineralogical and Metallurgical Examination of

The metallurgical aspects of fluorine in the current flotation circuit were studied in a survey conducted on 20 March 1997 The nine major streams in the flotation circuit were sampled and these were subjected to typically wet and dry mass determinations chemical assay and size by size analysis of each stream Get price Get Price

Review of the effect of grinding media on flotation of

It addresses media effects on the chemistry of flotation of each of the more common sulphide minerals and describes the mechanisms which have been proposed to explain these chemical effects These cannot be presented without a prior summary of current flotation chemical theory Get price Get Price

Effects of Process Parameters on Selective Flotation of

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 Get price Get Price

Flotation '19

11 45 Effects of frothers and the flow pattern of air supply on bubble size in a flotation column with diffused aeration Hangil Park Chun Yong Ng and Liguang Wang (The University of Queensland Australia) 12 00 Mineralogical and surface chemical characterization of flotation feed and products after wet and dry grinding M Peltoniemi R Kallio A Tanhua S Luukkanen and P Permki Get price Get Price

Chemistry of Flotation

Chemistry of Flotation cations chalcocite chalcopyrite Chem chemisorbed chemisorption Colloid complete flotation contact angle cupric cuprous cyanide depression diethyl dithiophosphate coverage layers natural hydrophobicity occurs oleate oxygen pH range pH values phenomena precipitation presented in Figure pyrite pyrolusite quartz Get price Get Price

Research Activities Related to Flotation Process

Research Activities Related to Flotation Process Matis KA Collector adsorption studies on the two minerals followed Read sorption of magnesium di-oleate molecules by hydrophobic aggregation was discussed as likely to be important in the enhanced recovery at near neutral pH Get price Get Price

Introduction to Mineral Processing

The response of many minerals to the flotation process is often dramatically affected by pH Flotation circuits are often operated at a pH range of 7 5 to 11 5 The exact range at any given plant is optimized for the ore at that site Lime is often used to raise the pH of the pulp and also reduce the flotation of iron pyrite Particle Size Get price Get Price

US7004326B1

A mineral separation process includes wet-grinding the ore to liberation of minerals oxidizing the slurry using air hydrogen peroxide or other oxidants and floating the valuable minerals at a pH between about 9 0 and 10 0 with a xanthate as collector and a combination of a polyamine and a sulfur containing species as depressants for arsenide minerals Get price Get Price

Effect of organic depressant lignosulfonate calcium on

In order to selectively separate chalcopyrite from pyrite the effect of organic depressant lignosulfonate calcium (LSC) on the flotation separation of chalcopyrite from pyrite was investigated by flotation tests The depression mechanism was studied by Fourier-transform-infrared (FTIR) analysis The flotation tests of single mineral show that LSC can depress the flotation of pyrite in a Get price Get Price

Synergistic Effect of Diethylenetriamine and Sodium

Oxidation (aeration of the flotation pulp) of Cu-activated pyrite induced by xanthate before 500 g/t DETA addition has a greater effect on the surface chemistry of the pyrite particles and subsequently increased pyrite depression The above condition decreased pyrite recovery drastically from 92% to 12% Get price Get Price

Carbonate Depression In Flotation

Modelling of pyrite depression process by lime in copper 2018-3-24 formation of calcium sulphate carbonate or hydrate as the main reason of pyrite depression by lime are in contradiction with facts of pyrite flotation in pulps saturated with respect to calcium sulphate (at Rommelsberg plant) or calcium carbonate [Abramov A A Chat Now Get price Get Price

The Effect of Regrinding Chemistry and Particle Breakage

Therefore the overall objective of this thesis study is to investigate the effects of regrinding chemistry and particle breakage mechanisms on the cleaner flotation The implementation of regrinding in the copper and pyrite flotation circuits at Telfer gold mine was taken as a case study Get price Get Price