Silverson mixer produces intense shearing forces and turbulence by the use of high speed rotors.
This turbulence causes the liquids to pass through fine interstices formed by closely placed perforated metal sheets.
Circulation of material take place through the head by the suction produced in the inlet at the bottom of the head.
Circulation of the material ensures rapid breakdown of the dispersed liquid into smaller globules.
Construction of the Silverson Mixer
It consists of long supporting columns connected to a motor which give support to the head. The central portions contain a shaft, one end of which is connected to the motor and the other end is connected to the head.
The head carries turbine blades. The blades are surrounded by a mesh, which is further enclosed by a cover having openings.
Working of the Silverson Mixer
The emulsifier head is placed in the vessels containing immiscible liquids in such a way that it should get completely dipped in the liquid.
When the motor is started, the central rotating shaft rotates the head. This in tum rotates turbine blades at a very high speed.
This creates a pressure difference; as a result liquids are sucked into the head from the center of the base and subjected to intense mixing action.
The intake and expulsion of the mixture set up a pattern of circulation to ensure rapid breakdown of the bigger globules into smaller globules.
Uses/Applications of the Silverson Mixer
Silverson mixer is used for the preparation of emulsions and creams of fine particle size.
Advantage of the Silverson Mixer
Silverson mixer is available for thousand liter of mixing.
Disadvantage of the Silverson Mixer
Occasional there is a chance of clogging of pores of the mesh.
