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Eccentric vibrating mills

Mechano-chemical activation and ultra-fine comminution of brittle materials of all degrees of hardness

Eccentric vibrating mill ESM 856 2ks drive side

The Eccentric Vibrating Mills type ESM impress with their high performance and reliability in a wide range of applications and feed materials in the field of mechano-chemical activation and ultrafine grinding. With our sizes ESM 190 and 230, machines are available for process development in the laboratory on the basis of which results can be obtained for scale-ups to operating machines.

Eccentric vibrating mills in the laboratory

Our Eccentric vibrating mills in sizes ESM 190 and 230 have been specially developed for process development in the laboratory. Our mills are designed to deliver reliable results, which are important for scaling up to production machines. As with the production machines, we also offer various lining options for our laboratory versions, including ceramic, rubber and steel.

In addition to the lining, our grinders can be equipped with various grinding media. These include materials such as steel, ceramic and glass, which is available in various shapes such as balls, cylpebs or rods.

Our Eccentric vibrating mills can be equipped with a double jacket for heating or cooling the mill. This enables additional control of the grinding process, especially with temperature-sensitive materials. Furthermore, they can be configured with various additional components such as underframes, soundproof cabins, glove boxes and various dosing and filling devices.

We are happy to carry out your individual design according to your ideas.

Eccentric vibratory mill ESM 194 1bs at the Hochschule OST / Switzerland
ESM eccentric vibratory mill in a "glove box"
SIEBTECHNIK TEMA Eccentric Vibratory Mill ESM 194 1bs
SIEBTECHNIK TEMA ESM 194-1bs eccentric vibratory mill for use in laboratories and research institutes

How does an Eccentric vibrating mills work?

Only the single-tube eccentric vibrating mill from SIEBTECHNIK TEMA performs inhomogeneous movements consisting of elliptical, circular and linear vibrations due to an outwardly positioned unbalance drive. The result is a high degree of loosening of the mill filling with very high impact stresses on the material to be ground, especially at high amplitudes. The high specific energy input with a high degree of loosening of the mill filling is a decisive advantage of the single-tube principle, which, due to its design, also enables a significant reduction in the mill mass and thus the drive energy. The eccentrically arranged unbalance excitation generates inhomogeneous vibrations, whereby the main wear zone in the Eccentric vibrating mills is distributed more evenly over half of the lower plating.

Structure & function of the ESM

Our Eccentric vibrating mills have a modular design and essentially consist of

  • the cylindrical grinding tube
  • Coil springs
  • the base frame
  • the grinding media filling
  • the imbalance exciter
  • of the leveling compound

Thanks to different discharge systems, the ESM can be used with the operating modes

  • Continuous throughput operation
  • Record-by-record batch operation
  • Automated batch operation

be equipped.

The mill is set into inhomogeneous vibrations via the three-phase direct drive and the exciter units, which lead to the high energy utilization already mentioned. The mill is filled with ground material via a pipe socket at the highest point of the grinding container and discharged at the lowest point at the other end of the grinding container. A perforated plate in the outlet prevents the grinding media from passing through.

Design variants

SIEBTECHNIK designs and manufactures Eccentric vibrating mills specially tailored to the respective application. Available options include

  • Lining of the grinding tube with wear-resistant armor made of special steels, ceramics or elastomers
  • Grinding media as balls, rods or cylpebs in a wide variety of materials
  • Cooling or heating via a double-walled grinding tube
  • Counter-swinging frame
  • Soundproof cabins
  • Inertization with inert gas; vacuum; ATEX
  • Complete systems including the necessary peripherals

Areas of application

The ESM has proven its efficiency in a wide variety of applications and feed materials in the field of mechanochemical activation and ultrafine grinding, including

  • Automotive supply industry
  • Pharmaceutical production
  • Construction industry
  • Biomass processing
  • Chemical industry
  • Ceramic industry
  • Animal feed industry
  • Hard materials and metals
  • and much more.

During mechano-chemical activation, highly reactive states are generated that arise when crystalline systems are subjected to impact stress. In general, brittle materials have a crystalline structure that represents the lowest-energy state before Crushing & Milling. When subjected to mechanical stress through impact, this crystalline structure is partially destroyed and the energy input is stored.

This results in highly reactive states which, for example

  • to increase responsiveness,
  • to improve solubility,
  • the magnetic properties,
  • the conductivity
  • and other physical properties.

Reactions between different crystalline systems are a special feature, whereby new substances with specific properties are created through solid-state reactions. Under these circumstances, the Eccentric vibrating mills take on the role of a mechano-chemical reactor.

Ultra-fine grinding in the Eccentric vibrating mills also follows specific laws. Depending on the product and grinding time, finenesses of 0 – 5 µm can be achieved and fibrous materials can be broken down.

Fiber destruction of asbestos

As an alternative to thermal asbestos destruction, the eccentric vibrating mill is used for fiber-free ultra-fine grinding of asbestos waste. During the ultrafine grinding of asbestos with the eccentric Vibrating mill, the impact stress and the associated high point temperatures achieve a complete destruction of the fiber structure through energy dissipation, so that needle-shaped, fibrous crystal structures are no longer detectable. The result is a fiber-free raw material.

Hard metals

Due to the high impact forces, the eccentric Vibrating mill can also be used for Crushing & Milling carbide scrap. For example, carbide drills or carbide cutting edges can be finely shredded.

Gallery

Eccentric vibratory mill ESM 194 1bs at the Hochschule OST / Switzerland
ESM 194 1bs at the Hochschule OST
ESM eccentric vibratory mill in a "glove box"
ESM eccentric vibratory grinder - in a "glove box"
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibratory mill ESM
Random orbital mill ESM 856 1ks
SIEBTECHNIK TEMA eccentric vibrating mill types ESM 856 2ks and ESM 324 2bs
Eccentric vibratory mill types ESM 856 2ks and ESM 324 2bs
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibrating mill ESM 856 2ks
Eccentric vibrating mill ESM 856 2ks
ESM eccentric vibrating mill for grinding sewage sludge ash to recover phosphate
ESM eccentric vibrating mill for grinding sewage sludge ash to recover phosphate
Eccentric vibrating mill ESM 856 2ks drive side
Eccentric vibrating mill ESM 856 2ks
3D sketch of the ESM 856 2ks eccentric vibratory mill for grinding wood fibers
ESM eccentric vibrating mill for grinding wood fibers
Eccentric vibrating mill ESM 656-1KS Experimental machine for process development at Clausthal University of Technology
Eccentric vibrating mill ESM 656 1KS: Experimental machine for process development at Clausthal University of Technology
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibrating mill ESM 856 1ks - Grinding of sewage sludge ashes for phosphate recovery
Eccentric vibrating mill ESM 504 1bs for mechanical activation in the field of metal-sugar complexes
ESM 504 1bs for mechanical activation in the area of metal-sugar complexes
SIEBTECHNIK TEMA Eccentric Vibratory Mill ESM 194 1bs
Eccentric vibratory grinder-ESM-194-1bs
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