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Drying Inorganic Pigments

An inorganic pigment is a natural or synthetic metal oxide, sulfide or other salt used as a colouring agent for paints, plastics, and inks. Critical in the extrusion of coloured polymers is the extrusion pressure (must be low) and the moisture content of the pigment powder has to be as low as possible. The extrusion pressure is related to the fineness of the dry powder; the finer it is, the better!

The pigment pastes are very viscous and sticky. Present production lines for ultra-fine inorganic pigments usually consist of a centrifuge, fluidised paddle dryer and mill. Hosokawa Micron's solution combines a centrifuge and a Drymeister (DMR-H) flash dryer, with a multi-blade rotor and high speed classifier.

The DMR-H flash dryer is a reliable machine for drying sticky inorganic pigment pastes. It is a very stable process resulting in a very fine and dry product in a one step process. The controlled high outlet temperature at 175°C ensures a high colour strength.

Drymeister (DMR-H) flash dryer

Try before you buy

At Hosokawa Micron B.V. we have our own testing and process development centre in Doetinchem, the Netherlands. It offers unique possibilities for testing your product to determine the most efficient process, system or plant prior to final design. We can provide laboratory-level as well as production-sized trials.

Whether you wish to test a single machine or a complete powder processing system, the same skilled and experienced staff are here to help ensure that your requirements are met, and that you are entirely satisfied with the results.

From pilot plant to production scale

We offer process equipment and technologies from individual units to large scale bespoke system solutions. Our principle is to deliver high performance yet affordable solutions that meet our customers' demands and long term challenges.

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Related Process Equipment

Hosokawa Micron B.V. is a process machinery supplier, providing mixing, drying and agglomeration equipment and systems for the powder and bulk processing industry.