Powder and Bulk Engineering
Wednesday, August 27, 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: 04/1992
Pages: 4
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Answers to 10 questions about drying (1992)

Particulate drying is an untidy business: The raw material is never a continuum, but is rather a three-phase mixture [solid, liquid, and gas or vapor]; the particles vary in size, shape, and surface character; phase boundaries during drying are ill-defined; and except in theory, flow mechanisms inside particles aren't well-understood. Drying isn't computer-friendly.

Drying is a major energy consumer and, potentially, a major source of atmospheric pollution: These factors are drawing attention now. In this second of a question-and-answer series on powder and bulk solids handling problems, a consultant answers 10 questions about recent drying developments.

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