Shear-induced floc structure changes for enhanced dewatering of coal preparation plant tailings

Ofori, Philip; Nguyen, Anh V.; Firth, Bruce; McNally, Clint; Özdemir, Orhan

doi:10.1016/j.cej.2011.06.082

Cited by 86 publications

(31 citation statements)

References 15 publications

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“…Characteristics of the process water obtained from the tailings slurries were also widely published. Results presented (de Kretser, et al, 1997;Ofori, et al, 2011) suggest that coal preparation tailings in the fines fraction consist mostly of phyllosilicate minerals, such as kaolinite, illite, muscovite, mica, and mixed-layer illite/montmorillonite clays, along with quartz. Residual coal particles are detected predominately in the coarse fraction .…”

Section: Size Classificationmentioning

confidence: 99%

Current state of fine mineral tailings treatment: A critical review on theory and practice

Wang

Harbottle

Liu

et al. 2014

Minerals Engineering

344

169

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Highlights Presented facts on escalating generation of fine mineral tailings worldwide.  Overview of coal, alumina, oil sands, and base metals tailings characteristics.  Reviewed theoretical and industrial developments for tailings management.  Determined numerous knowledge gaps between current theories and practices.  Identified opportunities for improvement towards more sustainable practices. Graphical AbstractEvolution of fine mineral tailings treatment objectives.Figures "Flocculated solids" and "Stackable solids" are adopted from Alamgir, et al. (2012), permission pending. The last figure "Reclaimed land" is adopted from Golder Associates (2009), permission pending. AbstractThe mining industry produces fluid fine mineral tailings on the order of millions of tonnes each year, with billions of tonnes already stored globally. This trend is expected to escalate as demand for mineral products continues to grow with increasingly lower grade ores being more commonly exploited by hydrometallurgy. Ubiquitous presence and enrichment of fine solids such as silt and clays in fluid fine mineral tailings prevent efficient solid-liquid separation and timely re-use of valuable process water. Long-term storage of such fluid waste materials not only incurs a huge operating cost, but also creates substantial environmental liabilities of tailings ponds for mining operators. This review broadly examines current theoretical understandings and prevalent industrial practices on treating fine mineral tailings for greater water recovery and reduced environmental footprint of mining operations.

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Section: Size Classificationmentioning

confidence: 99%

Current state of fine mineral tailings treatment: A critical review on theory and practice

Wang

Harbottle

Liu

et al. 2014

Minerals Engineering

344

169

View full text Add to dashboard Cite

show abstract

“…The authors of the article [11] recommended anionogenic flocculant for cleaning coal slimes and established the dependence of its consumption on the concentration of solid phase and the value of pH. The adsorptive activity of the polymeric flocculant is also influenced by other factors, for example, mineralization of liquid phase [12].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Study of the strength of flocculated structures of polydispersed coal suspensions

Shkop

Tseitlin

Shestopalov

et al. 2017

EEJET

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“…To clean coal slime containing fine mineral impurities of clay particles nonionogenic [4], ionigenic (cationogenic and anionogenic) flocculants [5], their combination with each other [6] with coagulants [3] or mineral salts [7] are used. General recommendations for the use of flocculants are reduced to the selection of the type and concentration of flocculant for purification of a particular type of slime with a certain concentration and disperse composition.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Flocculs Strength of Polydisperse Coal Suspensions to Mechanical Influences

Shkop

Tseitlin

Shestopalov

et al. 2017

EUREKA: Physics and Engineering

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The effect of the concentration and disperse composition on the flocculation strength to mechanical influence is investigated. It is found that the residual rate of floccules sedimentation after the mechanical influence at a constant rate of flocculant has a maximum value at a concentration of solids in the slime in the range of 7-30 g/dm3. The best results are obtained in all the experiments at a solids concentration of 10 g/l. It is found that at a concentration up to 7 g/l and more than 30 g/l, the floccules is formed. They have the lowest residual rate after mechanical influences. With increasing content of the solid fraction of 40-100 microns over 15%, the strength of floccules increases. They retain their shape and relatively high sedimentation rate even after mechanical influence. The obtained data allow to recommend correction of the slime composition before flocculant injection both the concentration close to the optimum, and the content of size fraction of 40-100 mm more than 15 %.

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Shear-induced floc structure changes for enhanced dewatering of coal preparation plant tailings

Cited by 86 publications

References 15 publications

Current state of fine mineral tailings treatment: A critical review on theory and practice

Current state of fine mineral tailings treatment: A critical review on theory and practice

Study of the strength of flocculated structures of polydispersed coal suspensions

A Study of the Flocculs Strength of Polydisperse Coal Suspensions to Mechanical Influences

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