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Wet Grinding Production
Circulation Attritors

How Circulation Attritors Work

The circulation grinding Attritor ("Q" machine) is a combination of an Attritor and a large holding tank which is generally about ten times the size of the Attritor. The unique principle of the "Q" Attritor is the high circulating (pumping) rate, which results in a faster grind and a narrower particle size distribution.
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Advantages of Using a Circulation Attritor:

• Faster grinding with narrower particle size distribution
• Uninterrupted, large-scale production
• Excellent temperature control
• Simple and safe to operate
• Low maintenance and power consumption

Common Applications for Attritors:

• Paints, toners, inks
• Ceramics
• Agricultural flowables
• Food products
• Chocolate, confectionery
• Paper coatings, calcium carbonate, clay
• Chemicals
• Ferrites
• Metal oxides
• Minerals, ores, coal
• Chemicals
• Sulphur dispersions



"Q" and "QL" Series



The circulation Attritor is used for difficult to grind and disperse materials and for the ultimate in micron size and quality. The main advantage of the “Q” series is the very narrow particle size distribution that can be achieved.

Large quantities of material can be ground with a smaller investment of grinding media and Attritor equipment. The slurry can be continuously monitored. Additional ingredients can be added to the premix tank at any time during the grinding, with sensitive materials being added near the end of the grinding cycle. Excellent temperature control is possible, since the slurry spends only 20-30 seconds in the grinding chamber and has plenty of time to be stabilized in the holding tank.

“Q” series Attritors are available in sizes ranging from the laboratory size Q-2 model up to the large-scale production model Q-100. For very large production, several Q-100 Attritors can be hooked up to a single holding tank.

Circulation Attritors designated as “QL” include specially configured arms and disks for special applications and increased performance.

A variety of accessories meeting different conditions, from cover seals for a totally enclosed system to metal-free systems, are available.

 ENGINEERING DATA
ATTRITOR MODEL
Q-03A^
Q-03B^^
Q-2/
QL-2
Q-6/
QL-6
Q-15/
QL-15
Q-25/
QL-25
Q-50/
QL-50
Q-100/
QL-100
Grinding Tank Capacity (gals)*
0.37
0.37
2.6
8.2
17
27.5
56
111
Media Volume (gals)*
0.30
0.30
2.2
7.5
15
25
50
100
Recommended Holding
Tank Capacity (gals)
1
2 or 3
5 or 10
75
150
250
500
1,000
HP**
1
1
3-5
7.5-15
15-25
25-40
50-75
100-150
Pumping Rate*** (gpm)
0.4
0.4
3.5
11
22
35
70
130
Total Height (A)
42"
75"
82"
74"
86"
96"
120"
124"
Base to Discharge Spout (B)
-
-
-
32"
37"
43"
53"
59"
Floor Space (W x D)****
29"27"
43"33"
44"49"
33"x46"
37"x53"
41"x60"
50"x70"
63"x78"
Weight (lbs) w/o Media***
330
640
1500
1800
3000
4000
6500
9900
Dimensions and weights are approximate.
^Q-03A - Bench Top.
^^Q-03B - With gear pump, large holding tank and mounted on frame riser.
Circulation Attritors designated as "QL" include specially configured arms and disks for special applications.
*Less for lined tanks.
**With high density media larger than 3/16", and with QL models, higher horsepower is required.
***Pumping rate is somewhat lower with ceramic grinding media or higher viscosity slurries.
****Dimensions and weights are for complete system.


    Model 100SCT

Laboratory Model (Q-2)

The laboratory Attritor model Q-2 comes complete with variable speed drive motor, tachometer, 5 or 10 gallon stainless steel jacketed holding tank with anchor stirrer and high speed mixer. Cover seals for completely sealed system are available. The stainless steel grinding chamber can be lined with alumina, zirconium oxide, silicon nitride, silicon carbide, food-grade rubber, polyurethane, or Tefzel®. Agitator arms can be stainless steel, plastic, tungsten carbide, or zirconium oxide. For complete metal-free systems, the holding tank can be HALAR® or nylon coated. Variable speed pump – gear, lobe, or air – is provided. Complete slurry lines (stainless steel or plastic) with valve and quick disconnects are provided. Special instrumentation can be added if so desired.

 


    Model 100SCT

Mini Laboratory Model (Q-03)

The Q-03 mini laboratory-sized circulation grinding mill is ideal for users who wish to perform lab trials with very small samples (from 1/2 gallon to one gallon) but still gain the advantages of a circulation grinding system. This small research Attritor offers the advantages of a circulation grinding mill including a high circulation pumping rate, narrow particle size distribution, good temperature control and the ability to sample and make formulation adjustments at any time.