Powder and Bulk Engineering
Thursday, August 21, 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: 06/2014
Pages: 3
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Pigment manufacturer is happy with classifying solution

An air classifier separates fine iron oxide particles from coarse to produce richer red pigments.

Ever wonder how brick-colored concrete pavers get that rich, red color? Before forming the pavers, a concrete manufacturer must mix natural or synthetic pigment with its concrete mix to achieve the desired shade. One pigment manufacturer mines natural red iron oxide for this purpose. Ten years ago, the manufacturer wanted to find a way to efficiently increase its iron oxide fine-particle concentration to produce more vibrant and consistent color.

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