For Standard Batch Grinding Applications
Batch-type Production Attritors are designated as “S” (Standard). When specially configured arms are ordered as an option the model designation becomes “SL.” When a torque meter is added to a machine, a “T” is added to the model designation. Batch Attritors range in size from a 16-gallon gross tank capacity to a 600-gallon gross tank capacity and from a 5 HP motor to a 150 HP motor. These versatile and easy-to- maintain grinding mills have been successfully used in a variety of industries to grind everything from chocolate to tungsten carbide. In addition, Attritors can be produced to meet the requirements of even the most stringent applications such as the electronic ceramic market. For this application, Attritors are available with metal-free systems to assure a contamination-free environment.
Batch Attritors offer the advantage that the material can be inspected any time during the grinding cycle. Therefore, adjustments or formulation additions can be accomplished without stopping the machine.
Attritors are ideal for long-term, heavy-duty, semi- and fully- automated production operations. They may also be used in conjunction with programmable controllers in highly sophisticated production environments.
Batch Production Mills “SC” Series For Tungsten Carbide Applications
High density material such as tungsten carbide requires a
specially designed heavy-duty Batch Attritor. The “SC” Series
Attritor meets this special processing requirement. Available
with tank capacities ranging from 7 gallons to 245 gallons and
horsepowers ranging from 7.5 to 125, these powerful grinding
mills feature a tapered tank to reduce load on the bottom arms
for easy starting. A special lifter arm raises media and product
off the bottom of the tank. Arms are sleeved with tungsten
carbide to reduce wear and contamination.
The tank has a ball discharge valve and media discharge
chute at the bottom for easy removal of media. A water-cooled
cover with a floating teflon seal minimizes solvent loss.
The tungsten carbide Attritor is also available with an
optional torque meter to precisely measure energy input for
determining processing time.
A worm gear assembly attached to the tank allows the
tank to be tilted. In this position, the shaft and arms can be
easily removed and/or inspected and the grinding media
changed, if necessary. All models come complete with a
pumping system which is used to circulate material during
grinding and to discharge product.
Batch Laboratory Mills 01-HD Batch Attritors are ideal for formulation research and studies
where only a small quantity of test material is available or needed.
Many accessories are available to meet various research criteria.
Batch or Continuous Production Mills ′′SD′′ Series The SD Dry Grinding Attritors can be operated in both
continuous and batch processing applications. In the
continuous operation, the material is fed into the vessel at the
top. It then migrates through the agitating media bed where it
is processed to a desired particle size and is discharged
through metering bar grids at the bottom of the tank.
In the batch mode, material is charged into the mill at the
top, ground for a predetermined time, then discharged through
grids at the bottom. The system can easily be sealed for
grinding under inert gases such as nitrogen or argon.
The SD Attritor is also used to make dispersionstrengthened
metal (DSM). In this process (known as
mechanical alloying or cold welding), the kinematic porosity
results in the grinding media breaking the metals into small
particles and beating them together to form agglomerates. By
repeating the process, the various metals are evenly mixed
and dispersed to form a new composition of alloy (DSM).
Union Process SD Dry Grind Attritors are ruggedly built machines with specially designed, two-speed, high starting torque motors.
They are also equipped with jacketed, stainless steel tanks and tilting mechanisms for ease of cleaning and maintenance.
Batch Attritors For very viscous applications
such as chocolate and nut
paste, the batch Attritor can be
used. It has the advantage of
allowing ingredients to be
added directly to the
grinding chamber without
premixing. A pump can be
supplied to aid in
discharging the product
from the grinding
chamber. A gear tilting
assembly facilitates easy
removal of the agitator
shaft for maintenance or
cleaning of the grinding
tank.
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