Green agglomerate

As in green agglomerate , green pellets , etc., means fresh (e.g. wet), uncured, etc. 

See Binding mechanism (Section 2.2). Technique involving induration of green agglomerate by heat. Generally, bonding at a temperature below the melting point of the main constituent by application of heat. 

Figure 51. Comparison of the tensile and crushing strengths of spherical green agglomerates made from differently sized limestone powders...

T. Green agglomerates are formed from solid particles and binder. 

As mentioned before, literally all mixers can be operated as agglomerators. The relative movement of the particles of a powder mass required to achieve uniform mixing causes particles to collide with each other. Such particle to particle contact may result in agglomeration if the adhesion criterion (Section 2.1) is fulfilled. In some cases, this may be due to van der Waals or other field forces if the particles are small enough. In other instances, binders (mostly liquids) are added to help in the building of green agglomerates. 

Baking A thermal post-treatment process, does not only induce the development of final bonding, structure, and consistency in bread but produces similar characteristics during the heat curing of any green agglomerate. 

Induration of green agglomerates by any method. (See also post-treatment.)... 

Strengthening of green agglomerates, mostly by heat. Non-cylindrical pore with varying diameter particularly a pore with narrow entrance followed by a large, internal volume. 

Porous structures in green agglomerates can be achieved if the feed particles are preagglomerated (Fig. 5.49) or consist of hi- or multi-modal particle size fractions. Another method is the production of loose packings by sedimentation. Then, to retain the open porosity, the sintering process must be carried out at a low temperature and for a short time or, to obtain more open pores, pore forming additives are mixed with the powder. 

Pore forming additives can be either liquids or solids. Liquid additives are used if the green agglomerate is produced by either extrusion, injection molding, or casting. In those cases, the porosity of the green body is controlled by the amount of liquid in the viscous mix. Because liquids are not compressible they occupy volume elements which... 

Begin of the next mode of operation, for example drying/cooling or discharge of green agglomerates. 

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