Powder and Bulk Engineering
Monday, September 01, 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: 12/1990
Pages: 3
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An introduction to gravity separators

A gravity separator separates dry, granular, free-flowing material according to particle density. The unit is typically used to improve product quality in seed and grain, mineral, and recycling applications. This article fist describes how a gravity separator works, then explains how to determine if your material is suitable for gravity separation. The final sections describe how to select a gravity separator and how to calculate the equipment's return on investment.

If your material contains impurities or damaged or off-spec particles, you may be able to improve the material's quality by running the material through a gravity separator, sometimes called an air table. The gravity separator grades the material by density, thus separating light from heavy particles.

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