Agglomeration in Environmental Control

Problems associated with recirculation of waste solids are caused by the fact that, in most cases, materials are physically and/or chemically unsuitable for direct use, and, therefore, must be converted to a different shape, size, and/or composition. The most common characteristic that needs to be changed is particle size. Often, at the same time, density and flowability must be increased and, in some cases, the specific surface must be altered. 

In the context of this subject three major agglomeration techniques, each with a variety of equipment choices, can be distinguished  

For the above reasons, applicability of both tumble or growth agglomeration and of size enlargement by heat is limited. 

High pressure agglomeration uses two fundamentally different principles confined volume compaction (Section 4.2.2.3) and roll pressing (Section 4.2.2.4). 

The most economical pressure agglomeration method, which is also applicable for a wide range of capacities, uses roller presses (see Section 4.2.2.4). Depending on the surface configuration of the rollers, either compacted sheets are produced which are subsequently crushed and screened into a granular product or, if the rollers are pocketed, briquettes are formed. For waste treatment and the production of secondary raw materials (recirculation of valuable components) the latter is often preferred. Briquettes are usually pillow shaped and almost monosized, featuring a volume that may typically range between 20 and 100 cm3. 

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Applications of agglomeration in environmental control 5,4,5,3,1 Separation of solids from fluids... 

Tab. 8.2 Origin, forms, and characteristics of particulate solid wastes Tah. 8.3 Possible effects and applications of size enlargement by agglomeration in environmental control Tab. 8.5 Areas in which size enlargement by agglomeration benefits solid waste management...

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