A simulation study of laboratory scale ball and vertical stirred mills

The aim of this study was to investigate the grindability of solid fossil fuels from a thermal power plant by using a vertical stirred mill and conventional ball mill. The solid fossil fuel sample was obtained from the Zonguldak Catalagzi thermal power plant in Turkey. The sample below 3350µm (d80 = 2100µm) was ground in the laboratory scale stirred mill and ball mill. The d80 sizes of the products at the end of grinding periods of 0.25, 0.50, 1 and 4 min in the stirred mill were determined as 190, 102, 78 and 28µm, respectively. For this purpose, the stirred mill was used at a stirring speed of 360 rpm and with a 6 mm diameter ball. In the ball mill, the d80 sizes of product after 1, 4, 8, 12 and 24 min of grinding were determined as 1802, 1130, 324, 167 and 81µm, respectively. The results indicated that grinding by means of a stirred mill was much more efficient than grinding with a ball mill in terms of size distribution of the products. The energy consumption of the product with d80 = 78µm was obtained as 10.53 kWh/t after 1 min of grinding time in the laboratory scale stirred mill. In the same manner, the energy consumption of product with d80 = 81µm by using the laboratory scale ball mill was 72.73 kWh/t after 24 min of grinding. It can be clearly seen that the d80 size of the fossil fuel reduced from 2100µm to 1130µm after a 4 min grinding period in the ball mill grinding tests. However, the d80 size of the solid fossil fuel reduced to 28µm after the same grinding time in the stirred mill and it was also possible to efficiently obtain size reduction below 100µm. However, the ball mill grinding process cannot provide this efficient size reduction for longer grinding times. The ball mill grinding experimental results and simulation results showed that they were fairly consistent with each other. The simulation of higher speed mills such as pin type stirrers has been extensively investigated for relatively small-scale applications by JKSimMet. In this study, the JKSimMet software package was adapted for a stirred mill with the help of the base model of ball milling. The aim of this study was to investigate the grindability of solid fossil fuels from a thermal power plant by using a vertical stirred mill and conventional ball mill. The time evolution of particle size and the related energy consumption have been determined. Furthermore, a simulation tool was used to describe the observed behavior. Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Yazar Samanli S.
Cuhadaroglu D.
Kizgut S.
Yayın Türü Article
Tek Biçim Adres https://hdl.handle.net/20.500.12628/4064
Tek Biçim Adres 10.1002/ppsc.200800026
Konu Başlıkları ball mill
grinding
JKSimMet software
mass balancing
stirred mill
Koleksiyonlar Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu
Dergi Adı Particle and Particle Systems Characterization
Dergi Cilt Bilgisi 26
Dergi Sayısı 05.Jun
Sayfalar 256 - 264
Yayın Yılı 2010
Eser Adı
[dc.title]
A simulation study of laboratory scale ball and vertical stirred mills
Yazar
[dc.contributor.author]
Samanli S.
Yazar
[dc.contributor.author]
Cuhadaroglu D.
Yazar
[dc.contributor.author]
Kizgut S.
Yayın Yılı
[dc.date.issued]
2010
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
The aim of this study was to investigate the grindability of solid fossil fuels from a thermal power plant by using a vertical stirred mill and conventional ball mill. The solid fossil fuel sample was obtained from the Zonguldak Catalagzi thermal power plant in Turkey. The sample below 3350µm (d80 = 2100µm) was ground in the laboratory scale stirred mill and ball mill. The d80 sizes of the products at the end of grinding periods of 0.25, 0.50, 1 and 4 min in the stirred mill were determined as 190, 102, 78 and 28µm, respectively. For this purpose, the stirred mill was used at a stirring speed of 360 rpm and with a 6 mm diameter ball. In the ball mill, the d80 sizes of product after 1, 4, 8, 12 and 24 min of grinding were determined as 1802, 1130, 324, 167 and 81µm, respectively. The results indicated that grinding by means of a stirred mill was much more efficient than grinding with a ball mill in terms of size distribution of the products. The energy consumption of the product with d80 = 78µm was obtained as 10.53 kWh/t after 1 min of grinding time in the laboratory scale stirred mill. In the same manner, the energy consumption of product with d80 = 81µm by using the laboratory scale ball mill was 72.73 kWh/t after 24 min of grinding. It can be clearly seen that the d80 size of the fossil fuel reduced from 2100µm to 1130µm after a 4 min grinding period in the ball mill grinding tests. However, the d80 size of the solid fossil fuel reduced to 28µm after the same grinding time in the stirred mill and it was also possible to efficiently obtain size reduction below 100µm. However, the ball mill grinding process cannot provide this efficient size reduction for longer grinding times. The ball mill grinding experimental results and simulation results showed that they were fairly consistent with each other. The simulation of higher speed mills such as pin type stirrers has been extensively investigated for relatively small-scale applications by JKSimMet. In this study, the JKSimMet software package was adapted for a stirred mill with the help of the base model of ball milling. The aim of this study was to investigate the grindability of solid fossil fuels from a thermal power plant by using a vertical stirred mill and conventional ball mill. The time evolution of particle size and the related energy consumption have been determined. Furthermore, a simulation tool was used to describe the observed behavior. Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
ball mill
Konu Başlıkları
[dc.subject]
grinding
Konu Başlıkları
[dc.subject]
JKSimMet software
Konu Başlıkları
[dc.subject]
mass balancing
Konu Başlıkları
[dc.subject]
stirred mill
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
0934-0866
İlk Sayfa Sayısı
[dc.identifier.startpage]
256
Son Sayfa Sayısı
[dc.identifier.endpage]
264
Dergi Adı
[dc.relation.journal]
Particle and Particle Systems Characterization
Dergi Sayısı
[dc.identifier.issue]
05.Jun
Dergi Cilt Bilgisi
[dc.identifier.volume]
26
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1002/ppsc.200800026
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/4064
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
21
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
09 Şubat 2024 19:10
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Tıklayınız
grinding stirred fossil results laboratory determined product consumption energy simulation thermal However reduced efficient JKSimMet reduction respectively obtained products conventional sample vertical grindability investigate stirrers Weinheim higher consistent fairly showed experimental longer provide cannot extensively
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