Wet Milling Machines

Wet Milling Machines

Wet milling machines are used in the process of wet milling various slurries comprised of solids and liquids in a rough mixture. The key to manufacturing success when combining liquids and solids is how well the solids can be wet out and dispersed into proper suspension in the liquid portion of the solution. A variety of wet milling machines can be used including ball mills, bead mills and colloid mills, all of which essentially grind the solids within the liquid phase through mechanical rotation or milling. A premix slurry is made in a vessel with agitation and typically, this level of agitation is not sufficient to disperse the solids effectively within the liquid medium. 

Our RotoMill Colloid Mills use a rotor element that turns at high speed inside a mating stationary component. The grinding action in the gap between the elements creates mechanical shear and milling while pumping the slurry out. The reduction in the primary particle size of the solid phase allows for a superior suspension with the added benefit of improved product appearance and performance.

Wet Milling Machine

rotomill diagram

Wet Milling Process Reduces Particle Sizes

Zinc and titanium dioxides, talc, salts, talcum, calcium carbonate and other solids need to be effectively ground down to manageable sizes to create better dispersions. A dispersion is similar to that of a wet slurry that involves processing the solids into a finer suspension.

When wet milling equipment is used to make these dispersions, it’s important to isolate the mechanical seal from the process slurry.  Sonic offers a Seal Flushing system that provides improved performance and simplicity above the age-old pressure pot units that resemble something off a world war sub.  Instead of using a completely pressurized vessel with a hundred bolts holding it together, we offer a simple vessel that is not pressurized and a PD pump that pressurizes the seal chamber by pumping through an adjustable valve that generates pressure.  This way, only the seal chamber sees the pressure instead of the entire piped system and vessel.  The vessel is jacketed to provide cooling and contains instrumentation such as level sensor and temperature sensor to monitor flushing fluid.  These are clean, sanitary assemblies using stainless tubing and sanitary connections.

Download FREE Wet Milling Machine Colloid Mill e-Booklet!

Colloid Mill Booklet

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