Fine Material Washer

Washing, Classifying & Dewatering Sand Screws

Designed to handle fine materials up to 3/4″ (19mm) in size, these spiral classifiers effectively remove clays, silt, and lightweight contaminants from sand, ensuring a clean and high-quality end product.

As the material progresses up the sand screw’s incline, unwanted particles are washed away, while heavier materials settle to the bottom and are efficiently transported up the tub.

Gravity allows water to drain from the material and the discharged sand is left with a moisture content of about 15-25%

Applications:

Sand

Concrete

Mason & Mortar

Phosphate

Iron Ore

Salt

Calculate Screw Speed

Get the recommended RPM and maximum TPH for your model.

CALCULATE

Advantages

Feature01_Fine Material Washer_Load Zone Baffle
01.

Load Zone Baffle

Calms down the rushing waters to help maximize fines retention and get you more money.

Feature02_Fine Material Washer_Weir Plate
02.

Weir Plate

Adjustable design encourages overflow water to level, which maximizes fines retention.

Feature03_Fine Material Washer_Belly Pan
03.

Belly Pan

Adjustable feature allows control of water bed depth for a cleaner, drier product.

Feature04_Fine Material Washer_Flushback Nozzle
04.

Flushback Nozzle

Utilizes an off-the-shelf, shaft-mounted gear reducer that is fully-guarded during manufacturing.

Fine Material Washer Operation

How Does A Fine Material Washer Work?

As the material enters the screw washer, it encounters a water-filled tub. The screw’s rotating shaft continuously moves the sand in an upward direction, which also creates a mixing action to break up clumps, dislodge fines, and agitate material for efficient cleaning.

Next, water is added to facilitate the washing process and remove impurities, such as clays, silt, and lightweight contaminants.

As material inclines up the tube, excess water drains from the material due to gravity and the material becomes progressively drier before discharging.

Comparing Screw-Based Washers

From all angles, wet screws look pretty similar. However, small design features allow each to perform a unique set of functions.

Fine Screw

Primary Function
Wash sand
Bonus Benefit

Dewatering and some surface cleaning

Feed Characteristics

Slurry

Moisture At Discharge

15-25%

CMW - 44x20 Single Screw Coarse Material Washer with Flange Bearings

Coarse Screw

Primary Function
Removes sand, slime and dust from gravel
Bonus Benefit

Improves effectiveness of screening

Feed Characteristics

Dry or wet

Moisture At Discharge

10-30%

Log Washer Render_36X30

Log Washer

Primary Function
Remove plastic clays from rocks
Bonus Benefit

Reduce deleterious materials
in feed

Feed Characteristics

Usually dry

Moisture At Discharge

10-30%

Blade Mill - AD105 BMFS4420 44x20 Single Blade Mill 8

Blade Mill

Primary Function
Convert dry feed into slurry for screening efficiency
Bonus Benefit

Remove lightweight organic particles

Feed Characteristics

Dry

Moisture At Discharge

40%

Take Control of Moisture Issues

A Cleaner, More Efficient screw

Screws are great tools for washing, but the discharged sand is wet and messy. Superior’s Aggredry® Dewatering Washer performs the same function, but produces a significantly drier product.

Compare to an AGGREDRY WASHER

Local Stock. Local Support. Local Experts!

models

Models

Compare Fine Material Washers

ModelScrew
Diameter (in)
Maximum
Material Size (in)
Capacity
(STPH)
Screw Speed
(rpm)
Auger
Motor Size
(hp)
Water Capacity
100 Mesh (GPM)
Water Capacity
150 Mesh (GPM)
Water Capacity
200 Mesh (GPM)
FMW1214OBS123/820407.515010050
FMW2424OBS243/850327.5500225125
FMW3024OBS303/8752515575275160
FMW3625OBS363/81002015700330180
FMW3625FBS363/81002115700330180
FMW4432OBS443/817517201600750425
FMW4432FBS443/817517251600750425
FMW4835OBS483/820016251700850450
FMW5434FBS543/827515301900950575
FMW5434FBS543/827514401900950575
FMW6035OBS603/8340134022001050600
FMW6635OBS663/8400125024001200650
FMW6636FBS663/8400116024001200650
FMW7238OBS723/8475116026001300700
FMW8438OBS843/855097531001600850
ModelScrew
Diameter (in)
Maximum
Material Size (in)
Capacity
(STPH)
Screw Speed
(rpm)
Auger
Motor Size
(hp)
Water Capacity
100 Mesh (GPM)
Water Capacity
150 Mesh (GPM)
Water Capacity
200 Mesh (GPM)
FMW2424OBT(2) 243/810040(2) 7.5890420235
FMW3024OBT(2) 303/815032(2) 151,000490280
FMW3625OBT(2) 363/820025(2) 151,250620340
FMW3625FBT(2) 363/820020(2) 151,250620340
FMW4432OBT(2) 443/835020(2) 202,8001,400675
FMW4432FBT(2) 443/835017(2) 252,8001,400675
FMW4835OBT(2) 483/840017(2) 253,0001,450750
FMW5435OBT(2) 543/855016(2) 303,5001,750950
FMW5434FBT(2) 543/855015(2) 403,5001,750950
FMW6035OBT(2) 603/868015(2) 403,7001,800975
FMW6635OBT(2) 663/880014(2) 504,0002,0001,200
FMW6636FBT(2) 663/880013(2) 604,0002,0001,200
FMW7238OBT(2) 723/895011(2) 754,5002,2001,250
FMW7238FBT(2) 723/895011(2) 1004,5002,2001,250
FMW8438OBT(2) 843/81,1009(2) 1004,8002,5001,350
ModelScrew
Diameter (mm)
Maximum
Material Size (mm)
Capacity
(MTPH)
Screw Speed
(rpm)
Auger
Motor Size
(kW)
Water Capacity
100 Mesh (m3/hr)
Water Capacity
150 Mesh (m3/hr)
Water Capacity
200 Mesh (m3/hr)
FMW1214OBS3101019405.6403020
FMW2424OBS6101046325.61206030
FMW3024OBS77010692511.21407040
FMW3625OBS92010912011.21608050
FMW3625FBS92010912111.21608050
FMW4432OBS1,120101601715370180100
FMW4432FBS1,120101601718.7370180100
FMW4835OBS1,220101821618.7390200110
FMW5434FBS1,380102501522.4440220140
FMW5434FBS1,380102501429.9440220140
FMW6035OBS1,530103101329.9500240140
FMW6635OBS1,680103641237.3550280150
FMW6636FBS1,680103641144.8550280150
FMW7238OBS1,830104321144.8590295159
FMW8438OBS2,14010500956710370200
ModelScrew
Diameter (mm)
Maximum
Material Size (mm
Capacity
(MTPH)
Screw Speed
(rpm)
Auger
Motor Size
(kW)
Water Capacity
100 Mesh (m3/hr)
Water Capacity
150 Mesh (m3/hr)
Water Capacity
200 Mesh (m3/hr)
FMW2424OBT6101091405.621010060
FMW3024OBT770101373211.223012070
FMW3625OBT920101822511.229015080
FMW3625FBT920101822011.229015080
FMW4432OBT1,120103192015640320160
FMW4432FBT1,120103191718.7640320160
FMW4835OBT1,220103641718.7690330180
FMW5435OBT1,380105001622.4800400220
FMW5434FBT1,380105001529.9800400220
FMW6035OBT1,530106191529.9850410230
FMW6635OBT1,680107281437.3910460280
FMW6636FBT1,680107281344.8910460280
FMW7238OBT1,8301086411561,030500290
FMW7238FBT1,830108641174.61,030500290
FMW8438OBT2,140101,000974.61,100570310
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Is your screw losing profitable material?

If your waste ponds are filling up with saleable sand, you might benefit from our Scavenger Wash Circuit.

Check your ponds.

If you find fines sands or silt (50-200 mesh) when cleaning out your waste ponds, that’s a sign the Scavenger Wash Circuit could benefit your operation.

CHEKC OUT THE SCAVENGER CIRCUIT

Sample your overflow.

Before you begin pond clean-outs, use a 100 mesh sieve under the weir (overflow control at the feed end of the screw). If you notice material loss here, the scavenger system can help recover those particles.

CHEKC OUT THE SCAVENGER CIRCUIT

Downloads

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Fine Material Washer Literature

New call-to-action

Washing Handbook

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