MIKRONS BEAD MILL
  
 
Frequently Asked Questions
 
Q.1: My mill freezes up and won't start, why?
There are several reasons why a mill will freeze up when not in use, but the most common is that it was left with too dry a bed of media in it. This might be just that the operator left the mill running after the pump had nothing more to feed it and the discs act as low grade centrifugal pump throwing fluid out and leaving the bed relatively dry.
Q.2: Why do I get skinning on my screen? It varies with same materials?
Skinning is polymerization or solvent evaporation, if your mill is kept closed this is not a frequent complaint.
Q.3: Why does my mill break the beads?
Please look the broken beads under a magnifying glass, if the particles are well rounded and do not have angular faces like that of a broken glass then you are looking at worn out beads. The beads can wear to a variety of shapes.

In a properly operating mill, the maximum force available is only few psi. Compare this number to the crush strength of glass beads (70000 psi), silica sand (12000 psi) and zirconium (130000 psi). We can see the difference between force available ad force required for breaking beads.

If force is applied to single bead in a mill, the pressure wave of liquid near disc pushes bead out of the way, if viscosity is low then beads will contact discs.
Q.4: My output varies; the media goes up and down … why?
This is a pump feeding problem. The pump will feed exactly the same amount constantly but only if it can get to it. The suction lines to pump are too small, too long or crushed. Or the strainer has not been cleaned. Also other important factors to be considered are good gasket in couplings, no air leaks in suction line of pump.
Q.5: We get all kinds of viscosity for our mills, what range of viscosities can we handle in bead mills?
This is one of the few things that cannot be limited, if a paste is too highly pigmented, it will fight the mill with dilatancy even if it is apparently thin. If resin solids are high, then grinding will be slow and the mill will flood at moderate rates. Some pastes work well at 50 KU, 80 and upto 95 KU.
Q.6: How hot should I run the mill? I don't want it blowing fumes into the room?
Run it as hot as the material will allow, if you don't , you wont get the rate up and may not even get the grind. If you have closed mill then fumes are no trouble. If you have open mill, then keep fume guard on. Do not guess at the temperature, put in a thermometer where material flows and put safe temperature on batch card for operator.
 
Working Principle of Bead Mill
Design Highlights of Bead Mill
Technical Specifications
Bead Mill - Types
Grinding Media
Batch Bead Mill
Agitator Bead Mill - Attritor
Frequently Asked Questions
Applications
 
 
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