Coarse Material Washer
Remove Unwanted Material
Built to withstand rugged conditions, our Coarse Material Washer will remove clay, dirt, vegetation, dust, and other rock coatings that cannot be removed by wet screening alone. In aggregates, coarse is usually defined as 3/8” to 3.5” (10 – 80mm).
These washing screws also aid in separating fine particles from the coarse aggregates. The combination of water and paddles agitate the material, allowing sand and other small particles to separate and be carried away as slurry.
By removing impurities, Coarse Material Screws contribute to the production of high-performance concrete and asphalt mixes.
Applications:
Asphalt
Concrete
Crushed Stone
Industrial
Recycled Materials
Road Base
Sand & Gravel
Advantages
01.
Skidded Frame
Adds rigidity to the machine so that its shape stays solidly square during installation and operation.
02.
Belly Pan
A curved design eliminates dead spots while a flush back nozzle enhances the material cleaning process.
03.
Overflow Gate
Adjustable feature allows control of water bed depth for a cleaner, drier product.
04.
Drive System
Utilizes an off-the-shelf, shaft-mounted gear reducer that is fully-guarded during manufacturing.
How Does A Coarse Material Washer Work?
Material is fed into the inlet of the tub as water is introduced through spray bars or nozzles. The water loosens and suspends unwanted materials.
As the material and water move along the length of the screw, shaft-mounted flights and paddles provide mechanical agitation. This action breaks up clumps, dislodges contaminants, and allows the water to thoroughly mix with the material.
Unwanted and finer materials form a slurry and are carried out the back end, while the cleaner and coarser material moves along the screw and discharges at the opposite end.
Comparing Screw-Based Washers
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%
Fine Screw
Primary Function
Wash sand
Bonus Benefit
Dewatering and some surface cleaning
Feed Characteristics
Slurry
Moisture At Discharge
15-25%
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%
Local Stock. Local Support. Local Experts!
Coarse screws are included in Lyman-Richey’s compact washing plant.
models
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