Selection and mathematical modelling of high efficiency air classifiers

Altun, Okay; Benzer, Hakan

doi:10.1016/j.powtec.2014.05.013

Cited by 63 publications

(27 citation statements)

References 13 publications

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“…The numerical simulations via CFD modeling [7][8][9][10][11][12][13][14] revealed that the performance of an air classifier is strongly influenced by the classifier configuration, structural of blades, and operating parameters. Some researchers [e.g., 4,[15][16][17] theoretically analyzed the performance of the classifier and presented some correlations to predict η and d 50 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

et al. 2015

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“…However, the mechanism of particle transportation in a fluidized bed depends on a number of hydrodynamic effects, including collisions of particles, and on the characteristics of both solid particles and suspended layer. Moreover, the use of a graphical method for calculating the process of pneumatic classification using separation curves is proposed in Reference [22]. Unfortunately, in this case, computer realization is not possible.…”

Section: Literature Reviewmentioning

confidence: 99%

Ensuring the Reliability of Pneumatic Classification Process for Granular Material in a Rhomb-Shaped Apparatus

et al. 2019

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This article is devoted to a detailed description of the developed physical model of the pneumatic classification process for detecting the rotating suspended layer and ensuring the frequency of loading and unloading of a pneumatic classifier. The related mathematical model is developed for estimating the non-stationary concentration of fine particles in a gas-dispersed flow with respect to time and height of the working space of the apparatus. The research is aimed at developing a pneumatic classification method for granular materials using a rhomb-shaped apparatus and ensuring the reliability of the operating process based on the influence of the flow on the granular material concentrations. The obtained experimental results allow evaluating the rational geometrical parameters of the working space in pneumatic granulators, as well as verifying the proposed mathematical model based on the implementation of the quasi-linear regression procedure. It is shown that the rhomb-shaped pneumatic classifier provides effective separation of granular material, reaching up to 95% of the target fraction. As a result, the proposed methodology can be implemented for optimizing geometrical profiles of pneumatic classifiers in terms of defining the required technological parameters of the pneumatic classification process.

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“…Sınıflama işleminin verimliliği Tromp ya da verimlilik eğrisi ile ifade edilebilmektedir. Sınıflandırıcıların matematiksel modellenmesinde verimlilik eğrisini ifade eden matematiksel eşitliğin kullanılabileceği Altun ve Benzer [15] tarafından belirtilmiştir. Bu çalışma kapsamında da verimlilik eğrisinin matematiksel modelini geliştiren Whiten'a ait verimlilik eğrisi yaklaşımı kullanılmıştır [16].…”

Section: Trommel Elek Modeliunclassified

Bi̇r Bakir/Çi̇nko Cevheri̇ Öğütme Devresi̇nde Enerji̇ Opti̇mi̇zasyonunun Sağlanmasi

Altun

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZCevher hazırlama süreci içerisinde enerjinin en yoğun harcandığı birim işlem kırma ve öğütme olup modelleme ve simülasyon çalışmaları ile enerji optimizasyonunun sağlanabileceği bilinmektedir. Bu çalışma kapsamında, kalkopirit, sfalerit ve pirit minerallerinin öğütüldüğü yaş çalışan bir öğütme devresinde gerçekleştirilen simülasyon çalışmalarının sonuçları sunulmaktadır. Çalışmada ilk olarak 2 adet bilyalı değirmen ve siklon bataryası bulunan tesisten numuneler alınmış ve boyut dağılımı, kimyasal analiz gibi ölçümler yapılmıştır. Sonrasında devreye ait kütle denkliği kurulmuş ve ekipmanlara ait model yapıları geliştirilmiştir. Model yapılarının geliştirilmesinin ardından farklı simülasyon senaryoları üzerinde durulmuştur. Sırasıyla, birincil bilyalı değirmenin çalışma %katı değeri ve hidrosiklona ait apex ve vortex parametreleri değiştirilmiştir. Tesiste yapılan değişiklikler neticesinde, besleme kuru tonajı 172,5 t/sa değerinden 190 t/sa ve 195 t/sa değerine çıkartılmış olup artış oranı sırasıyla %10 ve %13 olarak hesaplanmıştır. Bilgisayar ortamında tamamlanan hesaplamaların ardından işletme tarafından ikinci alternatif seçilmiş ve fiili olarak tonaj değeri 195 t/sa değerine çıkartılmıştır.Anahtar Kelimeler: Öğütme, optimizasyon, enerji, simülasyon ENERGY OPTIMIZATION OF A COPPER/ZINC GRINDING CIRCUIT ABSTRACTSince the comminution process is the most energy consuming part of the whole mining operation, it is well known that energy optimization can be provided with the aid of modelling and simulation studies. Within the scope of the study, the simulation studies performed for wet grinding circuit processing chalcopyrite, sphalerite and pyrite minerals are presented. Initially, sampling campaign was arranged around the circuit that consisted of two ball mills and a hydrocyclone cluster system. Then the size distributions together with the chemical assays were determined. Afterwards, mass balancing around the circuit was performed and the model structures of the equipment were developed. Model of the whole circuit was used to simulate different operating conditions. Initially, solid content of the primary ball mill was adjusted and apex/vortex geometries of the hydrocyclone were redesigned. As a consequence of the simulations, the dry tonnage of the feed to the circuit was increased from 172.5 t/h to 190 t/h and then 195 t/h that corresponds to increase by 10% and 13%. Finally, the second option was chosen for the plant and the real production rate was increased to 195 t/h.

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Selection and mathematical modelling of high efficiency air classifiers

Cited by 63 publications

References 13 publications

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

Ensuring the Reliability of Pneumatic Classification Process for Granular Material in a Rhomb-Shaped Apparatus

Bi̇r Bakir/Çi̇nko Cevheri̇ Öğütme Devresi̇nde Enerji̇ Opti̇mi̇zasyonunun Sağlanmasi

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