Mechanism of particle separation and analysis of fish-hook phenomenon in a circulating air classifier

Eswaraiah, C.; Angadi, Shivakumar I.; Mishra, B.K.

doi:10.1016/j.powtec.2011.11.036

Cited by 56 publications

(18 citation statements)

References 10 publications

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“…The above issues apart, we can summarise that Wang and Yu (2010), Hsu et al (2011) andEswaraiah et al (2012), report fish hook in CFD simulations. Of these, however, only Hsu et al have validated their results with experimental data.…”

Section: Cfd Modelsmentioning

confidence: 90%

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Fish hook effect in centrifugal classifiers – a further analysis

Nageswararao¹,

Medronho

2014

International Journal of Mineral Processing

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Section: Cfd Modelsmentioning

confidence: 90%

“…The appearance of fish hook in the results of CFD simulations is dependent the assumptions for formulation of the CFD model and the method used. Studies of Eswaraiah et al (2012) too indicate such a possibility.…”

Section: Cfd Modelsmentioning

confidence: 99%

Fish hook effect in centrifugal classifiers – a further analysis

Nageswararao¹,

Medronho

2014

International Journal of Mineral Processing

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“…This curve is also called in a different way: partition curve (King, 2001;Wills & Napier-Munn, 2006), distribution curve (Mohanta & Mishra, 2009), classification curve (Eswaraiah et al, 2012), classification efficiency (Johansson & Evertsson, 2012), classification efficiency curve (Schmidt & Werther, 2006), partial classification efficiency curve (Morimoto & Shakouchi, 2003), partial classification efficiency (Huang et al, 2012), grade efficiency curve (Rumpf, 1990;Bauder et al, 2004;Shapiro & Galperin, 2005) and grade efficiency function (Lanzerstorfer 2011).…”

Section: Introductionmentioning

confidence: 99%

“…There are also some other definitions of this curve: -Tromp curve shows the mass fraction of material of a specific size in feed to the classifier that reports to the coarse product (Schmidt & Werther, 2006;Eswaraiah et al, 2012), -Tromp curve determines what part of the classified material with defined size will enter the coarse product (Mohanta & Mishra, 2009), -Tromp curve shows the chance of a particle to be found in the coarse fraction in relation to its particle size (Dijkink et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…A strong relation was found between dispersive index of protein/starch mixtures and their performance upon air classification. A number of experiments were carried out in a circulating air classifier to study the mechanism of particle separation and fish-hook effect of the Tromp curve (Eswaraiah et al, 2012). Tromp curve was calculated using mass flow rate and cumulative size distribution of the coarse and fine fractions.…”

Section: Introductionmentioning

confidence: 99%

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Cut Size Determination of Centrifugal Classifier with Fluidized Bed / Wyznaczanie Ziarna Granicznego Klasyfikatora Odśrodkowego Z Warstwą Fluidalną

Otwinowski¹

2013

Archives of Mining Sciences

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The cut size determination on the basis of proposed matrix model of classification process in a centrifugal air flow classifier with a fluidized bed is presented using matrix model. The presented methodology of cut size determination is based on the precise measurement of the total mass of fed material and coarse product in experimental tests. Knowledge of the feed particle size distribution is also required. Considered classifier is a part of the fluidized bed jet mill. The presented cut size determination will allow to optimize mill work and prediction of particle size distribution of the classification products.Keywords: cut size determination, classification matrix model, Tromp curve, air classifier W artykule przedstawiono metodykę wyznaczania rozmiaru ziarna granicznego procesu klasyfikacji w odśrodkowym klasyfikatorze przepływowym z warstwą fluidalną przy wykorzystaniu modelu macierzowego. Przedstawiona metodyka oparta jest na dokładnym wyznaczeniu masy nadawy i gruboziarnistego produktu klasyfikacji na podstawie badań eksperymentalnych. Wymagana jest także znajomość składu ziarnowego nadawy. Rozpatrywany klasyfikator stanowi część fluidalnego młyna strumieniowego. Wyznaczenie rozmiaru ziarna granicznego umożliwia przeprowadzenie optymalizacji pracy młyna i prognozowanie składu ziarnowego produktów klasyfikacji.Słowa kluczowe: wyznaczanie ziarna granicznego, macierzowy model klasyfikacji, krzywa Trompa, klasyfikator aerodynamiczny

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A parametric cut size prediction model for a turbo air classifier

Liu

2018

Materialwissenschaft Werkst

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A new parametric cut size prediction model is put forward based on the simplified single particle motion rule. According to analysis of the inner flow field of a turbo air classifier and Lagrangian equation of particle motion, the particle's trajectory in the annular region is calculated and simulated using MATLAB. Since particles with different sizes have different trajectories in the same flow field, the cut size of a turbo air classifier can also be obtained. The simulated results show the cut size increases by widening the annular region and it decreases by narrowing the annular region. Talc powder classification experiments are carried out to verify this cut size prediction model. The calculated cut sizes using the proposed prediction model are in agreement with the experimental results. A new way to predict cut size is put forward, which provides a theoretical guidance to optimize operational parameters and the structure of the turbo air classifier.A parametric cut size prediction model for a turbo air classifier Materialwiss. Werkstofftech. 2018, 49, 1510-1519

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Mechanism of particle separation and analysis of fish-hook phenomenon in a circulating air classifier

Cited by 56 publications

References 10 publications

Fish hook effect in centrifugal classifiers – a further analysis

Fish hook effect in centrifugal classifiers – a further analysis

Cut Size Determination of Centrifugal Classifier with Fluidized Bed / Wyznaczanie Ziarna Granicznego Klasyfikatora Odśrodkowego Z Warstwą Fluidalną

A parametric cut size prediction model for a turbo air classifier

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