Spalling is a process in which a solid breaks down due to pressure exerted by a moving liquid. 

Spalling is a process that allows a solid to be disintegrated by means of the pressure exerted by a moving liquid.


A magnetic agitator or a static mixer creates this movement, the action of which will lead to the complete dissolution of the solid in the solvent, until a homogeneous mixture called a solution is formed.


When the solid has reached the end of its dissolution phase (it is then called a solute), the solution obtained is said to be saturated.


Spalling is a process widely used in the food, pharmaceutical and cosmetics industries, particularly for the manufacture of silica-based products, such as toothpaste, for example.

For the disintegration of solids, the use of stirrers with toothed disk dispersion turbines is preferred, which, due to their high shear effect and high peripheral speed, will accelerate the disintegration process in order to reach the saturation phase of the solution more quickly.

Equipment adapted for the application: Spalling :


stirrer propeller important shearing effect
Ax3 propeller for agitator, important shearing effect


stirrer turbine starting mixtures in decantate
Stirrers Turbine with 2, 3 or 4 blades at 45°, Axial/radial flow