Detachment particle

Mobilization. Fluid drag can yield particle detachment and mobilization. Mobilization depends on the balance among participating particle-level forces (gravitational and electrical), the magnitudes of which are controlled by particle size, and electrochemical fluid characteristics. 

As elementary particles detach from the floe, the radius fl gradually decreases so that the sum of the. number of free elementary particles and the number of elementary pirti-... 

If one considers that wear damage also results in energy dissipation, this approach can tentatively be applied to wear. Accordingly, wear processes can be classified as cohesive or interfacial depending on the length scales associated with particles detachment mechanisms (Fig. 1). 

These observations underline the strongly intricate interactions between particle detachment, third body rheology and evolving contact conditions which are inherent to wear processes in many macroscopic contacts. 

Influence of Dynamic Adsorption Layer on Small Particle Detachment... 

If flotation is not complicated by an energy barrier and too small the deposition of particles is accompanied by a break of the film and formation of a three phase contact line so that the possibility of particle detachment can be practically excluded. 

Two techniques decrease the possibility of particle detachment. One consists of the use of reagents which decrease the non-electrostatic component of the disjoining pressure. The second technique consists of choosing bubble size and hydrodynamic regime so as to decrease detachment forces. 

The use of surfactant of very low surface activity is unfavourable since it is associated with excessive amounts of reagent. The higher the ratio T /c , the lower is the concentration c at which one and the same required adsorption value F can be provided, all within the limits of condition (8.72). The retardation coefficient increases with F /c even at equivalent decrease of c which is also important to prevent particle detachment. Therefore, we propose to use a surfactant with a surface activity at which... 

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