Milling Journal

Hanover, MA—Sturtevant flour refining systems offer full operating flexibility and high capacities.

The Sturtevant Simpactor® pin mill or Powderizer® air classifying mill can be teamed with a Superfine® Air Classifier to obtain fractions precisely selected for particle size, starch protein level, viscosity, or absorption.

With this system, precise separations are easily achieved for protein shifts, primary classifications, coarse and fine separation for new end products; in one operation and no matter what the wheat source.

Supplemental recycling and blending make individual specifications.

A similar process can also be used for other grains including peas, corn, soy, barley and oat.

The Method of Operation: Material to be classified is fed through a top-mounted inlet and falls directly to a distributing plate which spins the material laterally, forming an "umbrella" of thinly spread particles.

Carefully controlled ascending air currents carry "fines" upward to the final selection zone. Here rejecter blades emit centrifugal force which acts to preclude oversize particles entering the "fines" chamber.

Oversize low protein flour drops out of the tailings cones while high protein flour "fines" are exhausted to a cyclone or bag collector.

Function: The air classifier has two distinct functions: first, it may be employed to select fine particles as the desired product; second, it can de-dust a coarse product.

In either case, the product selected can be varied by external control of the air velocity.

Use: By its ability to "cut out" a fines fraction from the carefully selected patent flour stream, the air classifier provides the means to alter the protein percentage in the end products.

The miller can also use the protein rich "fines" to enhance other streams.

The net effect is to allow the soft wheat miller to use the wheat grown in the immediate area to produce flour for the miller's special needs.

For the hard wheat miller, the air classifier offers the opportunity to divide-off a high protein fraction.

This must in turn be reground and classified to finally produce a high protein, clear fraction and a specialty low protein, "sweet goods" fraction.

Sturtevant offers a full line of size reduction equipment.

From large coarse particle crushers to the patented sub-micron Micronizer®, Sturtevant custom engineers units suited to the widest range of applications.

If an operation requires particle separation through air classification, Sturtevant produces three different kinds of air classifier systems.

Sturtevant customers come to know the kind of excellent back-up service that has become the hallmark of the Sturtevant name.

Founded by Thomas L. Sturtevant, the company is currently managed by W. Sturtevant English, Jr., the fifth generation from the company's founder.

For more information on air classification, please contact: Joseph Muscolino, Product Manager, Sturtevant Inc., 1-781-829-1431 – jmuscolino@sturtevantinc.com - www.sturtevantinc.com.

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