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!

Lyman-Richey's Super Compact Sand Washing Plant From Superior

Coarse screws are included in Lyman-Richey’s compact washing plant.

models

Models

Compare Coarse Material Washers

Single Screw Specs

ModelScrew
Diameter (in)
Maximum
Material Size (in)
Capacity
(stph)
Screw Speed
(fpm/rpm)
Motor
(hp)
Water
Capacity (GPM)
CMW2418OBS24260-75120/4015300-400
CMW3018OBS302100-125300/3720300-500
CMW3024OBS302100-125300/3725250-500
CMW3618OBS363150-175300/3025400-600
CMW3618FBS362149-176300/3230400-600
CMW3628OBS363150-175300/3030400-600
CMW4420OBS443200-250300/2630500-750
CMW4420FBS443200-250300/2640500-750
CMW4432OBS443200-250300/2650500-750
CMW4824OBS484200-250300/2430500-750
CMW4832OBS484220-275300/2440500-750

Twin Screw Specs

ModelScrew
Diameter (in)
Maximum
Material Size (in)
Capacity
(stph)
Screw Speed
(fpm/rpm)
Motor
(hp)
Water
Capacity (GPM)
CMW3018OBT(2) 302200-250300/37(2) 20500-700
CMW3024OBT(2) 302200-250300/37(2) 25600-1,000
CMW3618OBT(2) 363250-300300/30(2) 25700-1,200
CMW3618FBT(2) 362.4285-315300/32(2) 30700-1,200
CMW3628OBT(2) 363250-300300/30(2) 25700-1,200
CMW4420OBT(2) 443450-500300/26(2) 301,000-1,500
CMW4420FBT(2) 443397-496300/26(2 )401,000-1,500
CMW4432OBT(2) 443450-500300/26(2) 301,000-1,500
CMW4824OBT(2) 483.5450-500300/24(2) 301,000-1,500
CMW4832OBT(2) 483.5450-500300/24(2) 401,000-1,500

Single Screw Specs

ModelScrew
Diameter (mm)
Maximum
Material Size (mm)
Capacity
(mtph)
Screw Speed
(fpm/rpm)
Motor
(kW)
Water
Capacity
(m3/hr)
CMW2418OBS6103855-69120/401170-100
CMW3018OBS7705191-114300/371570-120
CMW3024OBS7705191-114300/371960-120
CMW3618OBS92076137-160300/3019100-140
CMW3618FBS92060137-160300/3222100-140
CMW3628OBS92076137-160300/3022100-140
CMW4420OBS1,12076182-228300/2622120-180
CMW4420FBS1,12075182-228300/2630120-180
CMW4432OBS1,12076182-228300/2637120-180
CMW4824OBS1,22089182-228300/2422120-180
CMW4832OBS1,22089200-250300/2430120-180

Twin Screw Specs

ModelScrew
Diameter (mm)
Maximum
Material Size (mm)
Capacity
(mtph)
Screw Speed
(fpm/rpm)
Motor
(kW)
Water
Capacity
(m3/hr)
CMW3018OBT77051182-227300/37(2) 15120-160
CMW3024OBT77051182-227300/37(2) 19140-230
CMW3618OBT92076227-273300/30(2) 19160-280
CMW3618FBT92060314-347300/32(2) 22160-280
CMW3628OBT92076227-273300/30(2) 19160-280
CMW4420OBT1,12076409-455300/26(2) 22230-350
CMW4420FBT1,12075360-450300/26(2) 30230-350
CMW4432OBT1,12076409-455300/26(2) 22230-350
CMW4824OBT1,22089409-455300/24(2) 22230-350
CMW4832OBT1,22089409-455300/24(2) 30230-350
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Downloads

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Coarse Material Washer Literature

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Washing Equipment Handbook

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