Powder and Bulk Engineering
Tuesday, September 02, 2014
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Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
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Publication Date: 02/1989
Pages: 4
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Reducing air entrainment problems in your roll press

This article discusses the problems entrained air creates during the roll-press compaction of powders. The author describes a powder-feeding system that reduces air entrainment and presents valuable research on how entrained air affects the compaction process, the resulting agglomerate, and the combined operation of the powder-feeding system and the roll press.

Powders pose special problems during roll-press compaction due to the large amount of air entrained between the finely divided particles [80 percent porosity is typical]. Entrained air creates three types of problems for a roll press.

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