The SIEBTECHNIK eccentric vibrating mill is of modular design and basically comprises
- the cylindrical grinding vessel
- helical springs
- the base frame
- the grinding media
- the exciter unit
- the counter weight
The mill is set – via the direct three-phase drive and the exciter units — into inhomogeneous vibrations, which lead to the already mentioned high energy utilisation.
The mill is filled with feed material via a nozzle at the highest point of the grinding vessel and the output at the lowest point at the other end of the grinding vessel. A perforated metal plate in the discharge prevents the grinding media from passing through.
Different output systems enable the ESM to be equipped with the following types of operation.
- Continuous operation
- Batch operation
- Automated batch operation
SIEBTECHNIK produces customized eccentric vibrating mills especially for the particular application concerned. Available options include:
- Lining of the grinding vessel with wear-resistant lining made of special steel, ceramic or elastomers
- Grinding-media as balls, rods or Cylpebs in the most varying materials
- Cooling or heating through a double-walled grinding jacket
- Sound absorbing hood
- Opposed-action frame
- Inertisation with protective gas; vacuum; ATEX
- Complete plants including the necessary periphery
The ESM has convincingly proven its performance in the most varied applications and feed materials in the field of mechano-chemical activation and micro-grinding, including in the
- Automotive supply industry
- Pharmaceutical production
- Building industry
- Biomass preparation
- Chemical industry
- Ceramic industry
- Animal food industry
In mechano-chemical activation, highly reactive conditions are generated, resultant in crystalline systems with impacting load. Generally, brittle materials have a crystalline structure, which prior to comminution represents the lowest-energy condition.
With mechanical load from impact, this crystal structure is partly destroyed and the incorporated energy stored.
This result in highly reactive conditions, which lead, for example, to
- an increase in reactivity,
- an improvement in solubility,
- magnetic properties,
- and other physical properties.
One peculiarity are the reactions of various crystalline systems with each other, whereby through solid-state reactions new materials come about with specific properties. Under these circumstances, the eccentric vibrating mill undertakes the role of a mechano-chemical reactor.
Micro-grinding in the eccentric vibrating mill likewise follows specific principles.
Here, fineness of 0 — 5 μm can be attained depending on the product and grinding duration, and fibrous materials developed.