Overview
What Is a Screw Sand Washer?
A screw sand washer uses a rotating helical shaft to lift and scrub aggregate through a water tank. Clay, silt and fine dust detach from the sand surface and are carried out with the overflow water, while the cleaned material is discharged at the top of the tank.
It is a heavy-duty choice for feeds that a wheel washer cannot handle — typically crushed rock with high clay content, abrasive manufactured sand, or feeds with a wide top size.
LZZG offers a range of screw sand washers built from Q345 plate for sand and gravel producers in aggregates, mining and concrete operations. The design keeps sand loss to a minimum during washing, and hard-faced flights with replaceable liners cut down on wear parts over the service life of the machine.
Screw Washer vs. Wheel Washer: Which One Do You Need?Most producers do not need both — the feed material decides.
Choose a screw washer when: feed has more than 3–5% clay, you wash crushed rock or recycled concrete, top size is up to 50 mm, or you need aggressive scrubbing to remove surface-sticking silt.
Choose a wheel washer when: feed is clean natural river sand, clay is below 2%, water supply is limited, or you want the lowest loss of fine fraction (below 0.6 mm).For manufactured sand from VSI crushers, a common setup is a screw washer for the main scrubbing duty, followed by a hydrocyclone recovery unit to capture the 0.074–3 mm fines the screw sheds to overflow.
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Working principle
How Screw Sand Washer Works
The Screw sand washer machine adopts inclination of 15°, under the water tank, three weir plates form the sediment pool, the screw head is immersed in this tank, the screw is driven by electric motor through reducer rotating continuously, the fresh water is feeding from porous plate at bottom of sediment tank.The screw sand washer is a kind ofsand washing machine, appliance by water fit with the sand maker. The sand washer can wash out micro amount of stone powder and impurities from the mixed sand made by the sand maker to improve the quality of the sand.
Through the generator and redactor drives the impeller to rotate in circles continuously in the water tank,the sand washers are impelled to make the sand stones and slag particles mixed, inverted and washed in the tank and discharged after dewatering of the materials in the impeller. The water volume is actually lower than a wheel washer for the same throughput.
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Features & Benefits
- Simple structure and the bearing is seperated from water and materials, thus avoiding damage due to rusting;
- Quick and easy weir adjustment, applied to multiple working site;
- Longer screw shafts for better dewatering, less outflow of materials washed, high washing efficiency, fully meeting the requirements of high-quality materials;
- Long service life and less wear parts, long mainterance period, thus greatly reducing the cost;
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Specifications
Model Feed Size（mm） Capacity （t/h） Spiral Diameter（mm） Spiral Number Trough Length （mm） Power （kw） Overall Weight（kg） Overall Size （mm） LX0760 ≤10 20-40 760 1 6000 11 3640 5700X1420X1900 LX0920 ≤10 30-60 920 1 8000 15 4270 8710X1630X2080 LX1120 ≤10 40-80 1120 1 8000 18.5 5560 9230X1840X2130 LX1500 ≤10 50-100 1500 1 8000 22 7260 9620X2230X2480 LX1800 ≤10 100-150 1800 1 8000 30 8360 1020X2530X2780 LX2200 ≤10 200-250 2200 1 8000 37 9630 11120X2830X2980 2LX0920 ≤10 60-120 920X2 2 8000 15X2 7580 8710X2600X2080 2LX1120 ≤10 80-160 1120X2 2 8000 18.5X2 10200 9230X3050X2130 2LX1500 ≤10 120-250 1500X2 2 8000 22X2 14600 9620X3730X2480 2LX1800 ≤10 250-350 1800 X2 2 8000 30 X2 17230 10200X4230X2780 2LX2200 ≤10 350-500 2200 X2 2 8000 37 X2 19630 11120X5330X2980 -
Inquiry
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