Mikro Pulverizer® Hammer & Screen Mill


The Mikro Pulverizer® Hammer & Screen Mill is a high speed mechanical impact mill designed for continuous size reduction of a wide range of materials down to D90 < 45 ?m. This device has evolved into the preeminent industrial mill with thousands of worldwide installations. Want to know more? Click here to watch our educational webinar on hammer mills.

Design & Options:

  • Laboratory (1 HP) to production (200 HP) available
  • Process 250 gram batches up to 15 tons/hour
  • Economical milling to D90 < 45 µm
  • Easy to operate and maintain
  • Available in mild steel, stainless steel and with wear protection
  • Pressure shock resistant (PSR) models available
  • Various configurations available to produce a wide range of products and results
  • Very durable & reliable designs for years of production
  • Compact and easy to clean design
  • Suitable for Chemical, Pharmaceutical, Food, Mineral and Cosmetic applications
  • Cryogenic grinding possible

Interested in working at Hosokawa? Please visit our career page to learn more!

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. The Mikro Pulverizers® comes in many model sizes from small pilot scale to massive production models.



about what we can do together