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Dr Yufan Mu - UQ Researchers

The interaction between grinding media and collector in pyrite flotation at neutral and slightly acidic pH. Mu, Yufan, Cheng, Yupu and Peng, Yongjun (2020). The interaction between grinding media and collector in pyrite flotation at neutral and slightly acidic pH. Minerals Engineering, 145 106063, 106063. doi: 10.1016/j.mineng.2019.106063

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Pyrite Oxidation And Its Control Amd Molecular Oxidation ...

Download Ebook Pyrite Oxidation And Its Control Amd Molecular Oxidation Mechanisms Microbial Role KChemistry University of Kentucky, Lexington. PYRITE OXIDATION and ITS CONTROL Pyrite Oxidation and its Control is the single available text on the market that presents the latest findings on pyrite oxidation and acid mine drainage (AMD). This

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Pyrite Oxidation And Its Control Amd Molecular Oxidation ...

Aug 24, 2021· pyrite-oxidation-and-its-control-amd-molecular-oxidation-mechanisms-microbial-role-k 2/9 Downloaded from qa.mailshell.com on August 24, 2021 by guest that one major difficulty in using froth flotation to separate pyrite from coal is the self-induced'' flotation of pyrite. Numerous studies have attempted to

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EP0568672B1 - Flotation separation of arsenopyrite from ...

Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3- ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings ...

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Pyrite Oxidation And Its Control Amd Molecular Oxidation ...

Sep 15, 2021· Control of Pyrite Surface Chemistry in Physical Coal Cleaning- 1992 Over the past 10 years, much research has provided convincing evidence that one major difficulty in using froth flotation to separate pyrite from coal is the self-induced'' flotation of pyrite. Numerous studies have attempted to identify reactions that occur under

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Interfacial electrochemistry of pyrite oxidation and ...

May 01, 1995· @article{osti_63221, title = {Interfacial electrochemistry of pyrite oxidation and flotation. 2: FTIR studies of xanthate adsorption on pyrite surfaces in neutral pH solutions}, author = {Wang, X H}, abstractNote = {Infrared spectra of short carbon chain ferric xanthanes (Fe(SSCOCR){sub 3}) were systematically characterized and compared with that of their …

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(PDF) Control of grinding conditions in the flotation of ...

Pyrite flotation was improved in the presence of copper(II), especially after grinding with mild steel. Fig. 6 shows the Eh during grinding as a function of grinding time. In the presence of chalcopyrite or copper(II), mild steel medium always produced lower Eh values than 30 wt.% chromium medium. Voltammetric studies have shown that activation ...

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Physico-chemical models for activation, flotation and ...

Physico-chemical models for activation, flotation and depression of pyrite in copper flotation book By A. A. Abramov, G. Önal, Z. Doğan Book Mineral …

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CiteSeerX — Pyrite flotation with xanthate under alkaline ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The extensive literature on sulfide flotation indicates that pyrite poorly floats under alkaline condition. Xanthate concentration has a positive effect on pyrite flotation, but above a pH of 11, pyrite seems to be strongly depressed, independently of the concentration in xanthate.

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Role of Montmorillonite, Kaolinite, or Illite in Pyrite ...

Flotation tests suggested that the detrimental effect of clay minerals on the flotation of pyrite increased as follows: montmorillonite > kaolinite > illite. With the help of rheology measurements, it was found that montmorillonite significantly increased pulp viscosity, which in turn substantially reduced pyrite recovery and grade.

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Selective adsorption behavior and mechanism of a high ...

Galactomannan (GM) was used as depressant to facilitate the separation of pyrite from talcum. Compared with common depressant dextrin, GM not only possessed higher selectivity, but also GM was consumed approximately 87% lower than that of dextrin at the optimal separation point. The recovery of pyrite and talcum was 83.52% and 26.73% respectively with pH 4.7 and GM …

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Sulphide deposits—their origin and processing | P.M.J Gray ...

Sulphide deposits—their origin and processing. Buy this book. eBook 96,29 €. price for Spain (gross) Buy eBook. ISBN 978-94-009-0809-3. Digitally watermarked, DRM-free. Included format: PDF. ebooks can be used on all reading devices.

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Surface cleaning and oxidative effects of ultrasonication ...

Abstract The effects of ultrasonication on the hydrophobicity of oxidized pyrite and the flotation of an oxidized pyrite ore were investigated in this work. Surface examinations show that ultrasonication (≥ 0.3 W/cm2) could result in surface cleaning and further oxidation of both slightly and heavily oxidized pyrite within 40 s. In the surface cleaning stage, the mechanical effects of ...

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Depression of lead-activated sphalerite by pyrite via ...

In this study, the flotation method was employed to recover sphalerite and pyrite from a galena flotation tailing waste. The reagent scheme, including Cu 2+ activator and butyl xanthate (BX ...

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[PDF] Notes On The Treatment Of Gold Ores Download eBook ...

Aug 29, 2016· Excerpt from Notes on the Treatment of Gold Ores In the following pages an endeavour is made to place before the public certain particulars on the subject of Gold Ores and their treatment, in such a form, that a reader who has no knowledge of the subject may be able, after perusal, to have some fairly clear idea of the outlines of the matter written upon.

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Biodepression of Copper-Activated Pyrite with ...

Acidithiobacillus ferrooxidans has been shown to be a good depressant of pyrite in freshwater and seawater flotation. However, the effect of these bacteria over copper-activated pyrite has not been studied. At the industrial scale, the activation of pyrite with copper is a common process that occurs because Cu2+ ions, released from other minerals, react with pyrite.

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Coal Flotation and Fine Coal Utilization, Volume 14 - 1st ...

Jul 04, 2001· Purchase Coal Flotation and Fine Coal Utilization, Volume 14 - 1st Edition. Print Book & E-Book. ISBN 9780444505378, 9780080529240

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Flotation of Sulfide Minerals | Woods Ronald | Taylor ...

Flotation of Sulfide Minerals . DOI link for Flotation of Sulfide Minerals. ... eBook ISBN 9780203741214. ... Electrochemical studies of sulfide ion oxidation on sulfide minerals have shown that polysulfide ion is the product on pyrite and galena at low potentials, whereas elemental sulfur is deposited at higher potentials. ...

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The Adsorption of Cu Species onto Pyrite Surface and Its ...

Jan 17, 2016· The adsorption of Cu species onto pyrite surface and its effect on flotation were investigated by using microflotation tests, first-principle calculations, and XPS surface analysis. The results indicated that the flotation of pyrite appears to be activated with CuSO 4 only at alkaline pH, while being depressed at acidic and neutral pH.

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FLOTATION OF PYRITE FROM COAL - SECRETARY OF THE …

I claim 1. A two-stage process for removal of pyrite from coal comprising the steps of (1) forming an aqueous pulp of the coal in a finely divided state, and frothing the pulp to collect the coal in the froth and leave a residual pulp containing course pyrite and (2) removing and repulping the froth product from step (1), conditioning the pulp with a coal flotation depressant and a pyrite ...

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(PDF) Sulfide Mineral Flotation | Morgan Zhao - Academia.edu

Sulfide Mineral Flotation Maurice C. Fuerstenau, Subhash Chander, and Ronald Woods INTRODUCTION Froth flotation was developed at the Broken Hill mine, Australia, a century ago with the flo- tation of the common sulfide mineral, sphalerite. With this development, billions of tons of worthless rock containing a variety of valuable metals became ore.

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Frontiers | Effect of Grinding Media on Grinding-Flotation ...

Grinding media have significant influence on the flotation of chalcopyrite and pyrite. This effect is mainly related to the change in the surface properties of chalcopyrite and pyrite. This paper investigates the influence of steel ball and nano-ceramic ball grinding on the floatability of chalcopyrite and pyrite. Flotation results, as well-scanning electron microscopy (SEM), X-ray ...

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Extraction of Alumina from Coal-Derived Pyrite Flotation ...

Abstract. A large amount of tailing from the flotation processing of pyrite ore are accumulated and landfilled, resulting in serious environmental pollution and a waste of valuable elements such as Al, Ti, Si, etc. Aiming to extract alumina from coal-derived pyrite flotation tailing, the process has been proposed based on activation roasting-alkali leaching for desilication, followed by ...

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(PDF) Pyrite Flotation: A Review - researchgate.net

This revie w was. intended to summarise the data obtained from the previous works conducted on the pyrite. flotation. In the following sections, general properties of …

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Hydrophobic Agglomeration of Fine Pyrite Particles Induced ...

Flotation reagents can change the surface properties of minerals, leading to differences in the interaction between mineral particles and affecting the mutual aggregation or dispersion of particles. In this work, we studied the role of activator copper sulfate, collector butyl xanthate and frother terpineol in adjusting the potential energy of pyrite particles from the perspective of the ...

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The depression of pyrite in selective flotation by ...

Oct 01, 2016· 1. Introduction. Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).Pyrite has very low economic significance and is usually removed from the valuable …

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Froth Flotation: A Century of Innovation - Google Books

Froth Flotation: A Century of Innovation comprehensively describes the state-of-the-art research and practice in mineral froth flotation as known and practiced a century after its introduction. Recognized experts from around the world provide in-depth coverage on the historical aspects of flotation; flotation fundamentals; flotation chemistry; flotation cells, modeling, and …

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US5171428A - Flotation separation of arsenopyrite from ...

Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 - ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings ...

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An Investigation Of The Effect Of Particle Size On ...

We have used X-ray photoelectron spectroscopy (XPS) to study the variation of surface pyrite density with coal particle size (53 4m - 250 4μm). We also detect and monitor pyrite oxidation to sulfate, an important process influencing the surface-dependency of coal-cleansing methods such as flotation. It is very likely that as coal is crushed as part of the processes employed to …

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The Flotation of Pyrite using Xanthate Collectors

The flotation properties of pyrite were found to be significantly influenced by va~iations in the pH. In acidic solutions the pyrite floatability is very high, and recoveries of 95% could be achieved using only a frother. A sharp decrease in floatability was observed in alkaline ...

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