Fine Dry Grinding of Zeolite in a Laboratory Ball Mill

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Küçük Resim

Tarih

2003

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Wiley-v C H Verlag Gmbh

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

This paper presents the importance and usage of natural zeolites, which was recently recognized in the industry. Therefore, the grinding properties of natural zeolite were studied with the emphasis on a kinetic study in a ball mill. The experimental mill employed was laboratory sized, 200 mm diameter, 191 mm length, providing a total mill volume of 6000 cm(3), with a total mass of 5.62 kg of steel balls of 25 mm diameter with a charge of 20% of the mill volume and with a rotation speed of 76 rpm. The breakage parameters were determined by using single sized feed fractions of -850 + 600 mum, -600 + 425 mum, and -425 + 300 mum for the zeolite samples. The S-i (specific rate of breakage) and B-i,B-j (primary breakage distribution) values were obtained for those feed size fractions in order to predict the product size distributions by simulation for comparison to the experimental data. From the experimental results, S-i values increased as the feed sizes became coarser, i.e., the highest S-i value was 0.85 min(-1) for -850 + 600 mum, while the lowest S-i value was 0.65 min(-1) for -425 + 300 mum feed ground in the mill. The B-i,B-j values obtained for the zeolite sample were gamma = 0.84, phi = 0.61, and beta = 4.25. The breakage parameters obtained showed that the zeolite is broken faster than quartz and slower than calcite and barite in terms of the a(T) values reported previously at the same experimental conditions. The simulations of the product size distributions of zeolite were in good agreement with the experimental data using a standard ball mill simulation program. The slowing-down effect was also seen in the mill after 4 min. of grinding.

Açıklama

Anahtar Kelimeler

Ball milling, Breakage, Grinding, Zeolite

Kaynak

Particle & Particle Systems Characterization

WoS Q Değeri

Q2

Scopus Q Değeri

Q2

Cilt

20

Sayı

4

Künye

Özkan, A., Yekeler, M., (2003). Fine Dry Grinding of Zeolite in a Laboratory Ball Mill. Particle & Particle Systems Characterization, 20(4), 276-282. Doi: 10.1002/ppsc.200390033