for the precision mixing of macro and micro powders as well as for the production of composites in the nano range.
Behind the idea of particle design is the wish for improved material properties. Whereas in the past, the aim was generally the production of ever finer powders, today the focus is on equipping particles with specific properties. These properties can be mechanical, optical, electric or chemical in nature. The efforts in this direction have opened up extremely interesting possibilities especially in the fields of pharmaceuticals, cosmetics, battery/storage battery manufacture, metallurgy and fuel cell development. Besides the pure application, however, certain aspects of handling the extremely fine products need to be considered. Assuming a suitable machine design, the fundamentally well-known operations comminution, dispersion, rounding, coating and agglomeration can also be carried out in the nanometre range in order to achieve the desired product properties. Since its formation in 2002, the Hosokawa Powder Technology Research Institute (HPTRI) – a Hosokawa Group research facility with 75 employees – has concentrated on the development of new machines and technologies for exactly these applications.
At the POWTECH, Hosokawa Alpine will be showing the NOBILTA Powder Processor on the joint Hosokawa Micron Group stand (Stand 7-360 in Hall 7).
The system offers the following processes in one single machine: precision mixing, the creation of composites and the surface treatment of particles, e.g. rounding. The Nobilta can also process even difficult products such as heat-sensitive, abrasive or sticky materials without problem.
The Nobilta system constitutes a further refinement of the technology of mechanofusion, whereby the substantially better mixing characteristics are especially worthy of note. In comparison with conventional mixing processes, the mixing time can be significantly reduced at the same mixing quality. Precision mixing in the micrometre and nanometre range is one of the tasks for which this system is ideally suited. The unique rotor design combined with high peripheral speeds also permits the mechanofusion process to be carried out, i.e. fine particles are fused permanently onto the surface of the base material without the need for binders in a mechanical process.
Lithium cobaltat / soot for rechargeable batteries (storage batteries).
Soot is fused onto the surface of the lithium cobaltat by means of a mechanofusion process. The soot, originally agglomerated, is dispersed with the Nobilta and a thin coat settles onto the base material. This process results in positive material properties: improved electrode conductivity, no agglomerates in the bulk material, lower suspension viscosity when manufacturing the electrodes.
The product line includes 5 machine sizes for volumes between 0.5 and 300 litres and with drive power values of between 7.5 and 200 kW.