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.
Advantages
01.
Load Zone Baffle
Calms down the rushing waters to help maximize fines retention and get you more money.
02.
Weir Plate
Adjustable design encourages overflow water to level, which maximizes fines retention.
03.
Belly Pan
Adjustable feature allows control of water bed depth for a cleaner, drier product.
04.
Flushback Nozzle
Utilizes an off-the-shelf, shaft-mounted gear reducer that is fully-guarded during manufacturing.
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%
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
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
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.
Local Stock. Local Support. Local Experts!
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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.
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.
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