Possibilities and problems of the submicron dry grinding in stirred ball mill (Part I)

Rácz, Ádám

doi:10.14382/epitoanyag-jsbcm.2010.10

Cited by 1 publication

(1 citation statement)

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“…Stirred ball mills are such machines which are suitable for ultraneand nanogrinding [3,4]. The application of this kind of apparatus becomes widespread in the last decade due to its simple structure and favorable energy demand.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Activation of Deposited Brown Coal Fly Ash in Stirred Media Mill

2014

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Present paper deals with the mechanical activation of deposited brown coal y ash in a high energy density mill. The mechanical activation was carried out in a laboratory scale stirred media mill using various rotor circumferential speed (5 and 7 m/s), and dierent grinding time (from 1 min up to 180 min). The consumed energy was measured during the grinding process. Furthermore, particle size distribution and specic surface area were determined using laser particle size analyzer. The structural changes were detected by Fourier transform infrared spectroscopy. Additionally, transformation in mineralogical phases was measured by X-ray diraction, as well as particle morphology and crystal defects were determined by transmission electron microscopy. As a result of the investigation, relationship between the technological parameters of the grinding and the properties of the ground material was created. It was found that there is a certain mechanochemical eect on the crystal structure of y ash components in the stirred media mill, as it was revealed by X-ray diraction and transmission electron microscopy. The most ecient grinding parameters were determined.

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Section: Introductionmentioning

confidence: 99%