Download the Batch Attritors Literature (246 KB PDF)

How Batch Attritors Work

The Attritor is often referred to generically as an "internally agitated high energy media (ball) mill." Batch Attritors work ten times faster than ball mills, and are advantageous because they offer simple operation, rugged construction, and a compact design. To learn more, visit our Education Center.

Advantages of Using a Batch Attritor:

Ten times faster than ball mills Simple to operate Energy efficient No premixing required

Minimum maintenance required Rugged construction Compact design No special foundation necessary

Common Applications/Industries:

Ceramics Paper Coatings Cosmetics Glass frits Industrial Coatings Chocolate Chemicals

Metal Paint Pharmaceuticals Ferrite Ink Electronics Catalysts

Carbides Toner Plastic Rubber Confectionary Recycling Many Others

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"S" Series

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 fullyautomated production operations. They may also be used in conjunction with programmable controllers in highly sophisticated production environments.

ENGINEERING DATA
ATTRITOR MODEL	S-5	S-10	S-15	S-30	S-50	S-100*	S-200	S-400
Gross Tank Volume (gals)	9	16	24	52	81	155	309	597
Slurry Capacity (gals)	4-5	7-9	10-12	23-25	34-37	70-75	140-150	280-300
Media Volume (gals)	5	9	12	25	37	75	150	300
HP	3-5**	5-7.5	5-10	10-20	15-25	20-40	40-75	75-150
Height***	79"	80"	83"	89"	97"	106"	121"	147"
Floor Space (W x D)	34"x 63"	52"x42"	52"x42"	61"x43"	74"x50"	82"x56"	88"x72"	108"x80"
Machine Weight (lbs) w/o media	1500	1800	2200	3100	3500	5000	8800	14,000
*These specifications apply to all S-100 machines since 1987 when the machine was   redesigned to have a larger capacity. **Features variable speed drive motor. ***Varies according to motor HP. Equipment can be built to CE specifications, if required.

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"SC" Series For Tungsten Carbide Applications

100-SCT

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.

ENGINEERING DATA
ATTRITOR MODEL	SC-5	SC-10	SC-15	SC-30	SC-50	SC-75	SC-100	SC-150	SC-200
Gross Tank Volume (gals)	7	12	20	42	62	87	117	161	245
Slurry Capacity (gals)	2.5-3.5	4-6	7-9	18-20	25-28	35-39	45-50	68-75	90-100
Media Volume (gals)	3	5	8	18	26	37	47	71	94
HP	7.5*	10	15	20	30	40	50	75	125
Height	73"	86"	86"	92"	98"	102"	104"	118"	126"
Floor Space (W x D)	36"x 64"	59"x42"	59"x42"	65"x48"	72"x54"	78"x55"	83"x56"	89"x64"	94"x72"
Machine Weight (lbs) w/o media	1700	2400	2700	3700	4600	5000	6500	8900	11,000
*Features variable speed drive motor. Equipment can be built to CE specifications, if required.

Download the Circulation Attritors Literature (240 KB PDF)

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. To learn more, visit our Education Center.

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 Sulphur dispersions

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Q-100

"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-6/QL-6	Q-15/QL-15	Q-25/QL-25	Q-50/QL-50	Q-100/QL-100
Grinding Tank Capacity (gals)*	8.2	17	27.5	56	111
Media Volume (gals)*	7.5	15	25	50	100
Recommended Holding Tank Capacity (gals)	75	150	250	500	1,000
HP**	7.5-15	15-25	25-40	50-75	100-150
Pumping Rate*** (gpm)	11	22	35	70	130
Total Height (A)	74"	86"	96"	120"	124"
Base to Discharge Spout (B)	32"	37"	43"	53"	59"
Floor Space (W x D)	33"x46"	37"x53"	41"x60"	50"x70"	63"x78"
Weight (lbs) w/o Media	1800	3000	4000	6500	9900
Dimensions and weights are approximate. *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. Equipment can be built to CE specifications, if required.

Download the Continuous Attritors Literature (172 KB PDF)

How Continuous Attritors Work

The continuous Attritor is a compact vertical design suitable for continuous production of large quantities of materials. Advantages of using a continuous Attritor include continuous large production, fastest grinding and processing, excellent temperature control, simple and safe operation, and low power consumption. To learn more, visit our Education Center.

Advantages of Using a Continuous Attritor:

• Continuous large production
• Fastest grinding and processing
• Excellent temperature control
• Simple and safe to operate
• Low maintenance and power consumption

Common Applications for Attritors:

Minerals, ores, coal Paints, toners, inks Ceramics Food products Chocolate, confectionery

Paper coatings, calcium carbonate, clay Ferrites Metal oxides Agricultural flowables Chemicals

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"C/H" Series

Continuous Attritors are best suited for the continuous production and fast grinding of large quantities of material. They are designed to deliver hours of low-cost, maintenance-free operation. The basic model features a system that does not require an expensive shaft seal.

Continuous Attritors come in two basic types, “C” and “H” series. The “C” series runs at lower RPMs and generally uses a larger grinding media of 5mm – 10mm diameter. The “H” series runs at higher RPMs and utilizes smaller media of 1mm – 3mm.

Both C and H type Attritors are available in sizes ranging from the large scale production model C/H-100 to the laboratory size C/H-3 and C/H-5 models.

The laboratory size continuous Attritor models are designed to reliably test and scale-up to production-size continuous Attritors. They can also be used to produce small quantities for developmental purposes.

A variety of accessories are available to meet different process conditions including special models with all stainless steel wetted parts.

            

Standard Features

• Special 450% starting torque, 2-speed, 2-winding motors for easy startup
• Standard (TEFC) or explosion-proof electric motor and controls
• Grinding tank (304SS) jacketed for heating or cooling
• 90° tank tilt for shaft removal and easy cleaning
• 4140 steel shaft with hardened tool steel agitator arms
• Media discharge valve
• Choice of variable-speed gear pump or air diaphragm pump

Tank and Arm Options

• Alumina-lined grinding tank
• Rubber-lined grinding tank
• Tungsten carbide sleeved agitator arms
• Zirconium oxide sleeved agitator arms
• Polyurethane sleeved agitator arms
• 440C stainless steel arms

Special Options

• All models can be equipped with a torque meter to precisely measure energy expended in the grinding chamber.
• Stationary arms can optionally be fitted into the tank wall in configurations best suited for your specific application. These arms are removable/interchangeable.
• Baffles and special linings can be fitted or coated on the tank walls to increase the life of the tank in applications such as power plants and mining when maintenance must be kept to a minimum.
• Variable speed drive motor systems.
• Cover and shaft seals for grinding in a closed (pressurized) system.