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Mikro Pulverizer Hammer & Screen Mill Demonstration

The Mikro Pulverizer® Hammer and Screen Mill is a high-speed mechanical impact mill designed for continuous size reduction of a wide range of materials down to D90 < 45 μm. This device has evolved into the preeminent industrial mill with thousands of worldwide installations. Our educational video reveals the key features and how it works.

Features and Benefits

The Mikro Pulverizer® consists of a high-speed rotor assembly fitted with hammers. The grinding chamber is fitted with a cover containing a multiple deflector liner and a retaining screen at the point of mill discharge.A screw mechanism is often used to introduce feed material into the grinding chamber. The grinding process is affected by three basic variables: the type of hammers, the rotor speed, and the size and shape of the screen opening.

There are two types of hammers: the “stirrup,” recommended where a fine particle size is desired; and the “bar,” which generates a coarser grind with a minimum of fines. Both types are tipped at the wearing edge with various abrasion-resistant alloys. Rotor speed affects the fineness of the grind as follows: low speeds result in a coarse grind and high speeds produce a fine grind. Size and shape of the retaining screen openings also affect the product. In general, a finer screen opening will result in a finer grind. The retaining screen does not function as a sifting screen, except in coarse granulations.

Controlled Particle Size

Optimum particle size reduction can greatly affect chemical reaction speeds, solubility, weight, color, volume, appearance, and strength of ground products. Mikro-Pulverizers® provide accuracy in particle size control because the grinding action is entirely mechanical. Once a mill is set to deliver a certain product, it will continue to produce exactly the same result without adjustment.

Grind, Blend, and Disperse

Mikro Pulverizers® grind, blend and disperse in a single operation. Intensive action thoroughly mixes dissimilar ingredients into a finished product. Heat-sensitive materials are handled by adjustment of mill speed, hammers, screen, and discharge air relief, as well as with pneumatic conveying. Conditioned air may be bled into a grinding chamber, or the feed may be pre-conditioned or chilled.

Mikro Pulverizers® come in many model sizes from small Laboratory (1 HP) models to production (200 HP) versions. They can process 250-gram batches up to 15 tons/hour. Various configurations are available to produce a wide range of products for the chemical, pharmaceutical, food, mineral, and cosmetic industries.
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