IMPROVING THE SPECIFIC RATES OF BREAKAGE OF KAOLEN IN THE BALL MILL BY MICROWAVE DRYING DOI Numarası (DOI Number): 10.21205/deufmd. 2017195522

Yıl 2017, Cilt: 19 Sayı: 55, 267 - 278, 01.01.2017

Selçuk Samanlı Özcan Öney Kamil Geveze

Öz

In this study, grinding tests were carried out to
determine the effects of microwave drying on specific breakage
rate in a ball mill. Kaolen samples, taken from
Balikesir/Duvertepe, were prepared at mono size groups (-
3350+2360 μm, -2360+1700 μm and -1180+850 μm) for grinding
tests performed as dry in Bond ball mill which was run at 70 rpm.
The kaolen samples prepared at mono size groups were dried in
conventional oven (at 105 Co with 4 hours) and microwave oven
(at 850 W with 12 minutes) in order to remove rough moisture
value (1.5%) from the samples prior to grinding. As a result of the
grinding tests it was determined that the specific rates of
breakage at all three mono sized kaolen samples treated with
microwave drying were faster than those of the untreated kaolen
samples.

Anahtar Kelimeler

Grinding, Kaolin, Microwave drying, Ball mill, Specific rate of breakage

MİKRODALGA KURUTMANIN KAOLEN NUMUNESİNİN BİLYALI DEĞİRMENDEKİ ÖZGÜL KIRILMA HIZINI ARTIRICI ETKİSİ

Öz

Bu çalışmada; Balıkesir/Düvertepe’den alınan kaolen
numunesi üzerinde dar tane boyut gruplarında (-3350+2360 μm,
-2360+1700 μm ve -1180+850 μm) mikrodalga kurutmanın özgül
kırılma hızına olan etkisini belirlemeye yönelik öğütme testleri
yapılmıştır. Öğütme testleri Bond tipi bilyalı değirmende 70
dev/dak ile kuru olarak gerçekleştirilmiştir. Deneylerde kullanılan
kaolen numunesi dar tane boyut gruplarında etüvde (105 oC’ de 4
saat) ve mikrodalga fırında (850 W’ da 12 dk) kurutulmuş ve
kaba nem değeri (%1,5) öğütme öncesi numunelerden
uzaklaştırılmıştır. Sonuçta; her üç dar tane boyut grubunda da,
mikrodalga işleme tabi tutulmuş kaolen numunesinin
konvansiyonel olarak etüvde kurutulmuş kaolen numunesine
kıyasla kırılma hızlarında belirgin artış olduğu belirlenmiştir.

Anahtar Kelimeler

Öğütme, Kaolen, Mikrodalga kurutma, Bilyalı değirmen, Özgül kırılma hızı

Kaynakça

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