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HomeMaterials Science ForumMaterials Science Forum Vol. 899Experimental Study of Charge Motion in a Tumbling...

Experimental Study of Charge Motion in a Tumbling Ball Mill

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Abstract:

Tumbling ball mills are a common comminution device in the mineral industry processing, wherein the particle size reduction is performed by action of the grinding media. Different forms of transverse motion in a rotating cylinder have been studied by many researchers. The aim of this paper was to study the transitional phenomena between cascading, cataracting and centrifuging motion. In order to observe these transitions, experiments were carried out in a tumbling mill of 300 mm diameter, and three sizes of chrome steel balls were used as grinding media. Each size of ball was employed in three different lengths of the mill with the purpose to investigate the end-walls effect in the behavior ball charge. The image analysis technique was employed to identify the transition regions. A high-speed camera with maximum speed of 2000 frames/s was used to record images. Experimental data showed it was not found the end-wall effects on the transitional behavior, and this effect can be assessed in numerical studies by analyze of the specularity coefficient.

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Advanced Powder Technology X

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Periodical:

Materials Science Forum (Volume 899)

Pages:

119-123

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https://doi.org/10.4028/www.scientific.net/MSF.899.119

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Online since:

July 2017

Authors:

Marcela Vieira Caixeta Machado*, V. Straatmann, Claudio Roberto Duarte, Marcos A.S. Barrozo

Keywords:

Cataracting Regime, Charge Behavior, End-Wall Effects, Grinding Media

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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