Agglomeration mechanisms

Fig. 7. Illustration of agglomeration mechanism of silica (after Hayashi et ai. Ref. [6]).

Mori [67, 68] reported a similar behavior with the degree of wetting. Likewise, the agglomeration mechanism could be confirmed with the help of this model by raising liquid mass flows, gas inlet temperatures and gas mass flows. 

Of course, in any classification system areas of overlap are unavoidable. Some size enlargement processes involve more than one agglomeration mechanism. For example, thermal after-treatment is quite common to harden... 

Although a limited amount of agglomerates can be characterised as being one of the two extreme types, the identification of these extremes has served as a useful concept for the design of experiments to study agglomeration mechanisms and associated interaction processes between bed material and ash-derived components. The following experiments have been performed ... 

An agglomerate coordination number. c, can be defined as the average number of contacts of a particle in an agglomerate siructure. The coordination number is important to understanding agglomerate mechanical and electronic proper ie.s. The value of can also... 

The adhesion, bonding, and final structure of these particle arrangements are controlled by the fundamentals of agglomeration, especially the binding mechanisms. Therefore, ideas for new products consisting of more or less defined particle assemblies of various size, structure, and properties can be derived from an in depth knowledge of agglomeration mechanisms. 

Destroy agglomerates mechanically (rubber cubes/balls, shear, impact, brushes, gas (air) jets, ultrasound, etc.)... 

The problem becomes complicated and essentially escapes a rigorous theoretical description when the crystals in a stirred suspension are susceptible to secondary nucleation or grow via an agglomeration mechanism. In order to suppress the formation of contact secondary nuclei, the impeller may be covered with a plastic coating, and its speed reduced to the lowest acceptable level. Sometimes a fines destruction loop is the only possibility in order to control an excessive secondary nucleation (Karpinski 1981). 

Figure 10.17(b) Cumulative undersize CSD in a suspension containing SrMo04 after 1-h stirring time as a function of mixer revolutions, as reported by Mullin el al. (1990). Growth occurred via an agglomeration mechanism. 

The agglomeration of particles in a colloidal solution is due to instability and is responsible for most turbidity and sediment occurring in wine. This phenomenon, also known as flocculation, corresponds to the separation of the colloid into a colloidal crystal (gel) and a liquid. The end result is the formation of various types of flakes. In order to understand the particle agglomeration mechanism, which causes the solution, i.e. wine, to go from a clear state to a turbid state that is resolved by... 

Figure 2 A recent approach in describing the agglomeration mechanism. (Adapted from Ref. 2.)...

Based on these views, this chapter explores the agglomeration mechanism of the latex system used in our work. 

Surface texture may influence the agglomeration mechanisms, where some particles tend to stick together, and some not. 

The aerosol model In VICTORIA accounts for the following basic mechanisms (1) condensation or evaporation from aerosol particle surfaces (2) deposition onto structural surfaces (3) agglomeration of aerosol particles (4) and transport of aerosols from one cell to another by advection. The deposition mechanisms modeled are gravitational settling, laminar or turbulent deposition. Brownian motion, thermophoresis, diffusiophoresis, and inertial deposition in curved channels (bends). Agglomeration mechanisms include Brownian motion, relative gravitational motion. Interactions In a shear field, and inertia in a turbulent field. 

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