A Screw Sand Washing Machine is a type of equipment used to wash, classify, and dewater sand and other granular materials in industries like mining, konstruksie, en steengroef. It utilizes a screw mechanism to lift and clean the material while removing impurities.

Sleutel kenmerke & Werksbeginsel:
1. Struktuur:
- Consists of a rotating screw (auger) inside a trough or tub.
- Water inlet for washing and an overflow weir for removing impurities.

2. Working Process:
- The screw rotates, lifting sand from the bottom of the tank.
- As the sand moves upward, it is washed by water jets or immersion.
- Impurities (klei, stof, organic matter) are flushed out through the overflow weir.
- Clean sand is discharged at the top after dewatering.

3. Voordele:
- Efficient cleaning & high recovery rate (95%+).
- Low water consumption compared to bucket-wheel washers.
- Simple structure with minimal maintenance needs.
- Handles fine and coarse sand effectively.

4. Aansoeke:
- Washing natural sand or crushed sand for construction (beton, mortar).
- R

ving silt/clay from aggregates in quarries.
- Minerale verwerking (bv., ystererts, silika sand).

Types of Screw Sand Washers:
- Single Screw Washer: One spiral for small-scale operations.
- Double Screw Washer: Two parallel screws for higher capacity.

Comparison with Other Sand Washers:
| Kenmerk | Screw Washer | Bucket Wheel Washer | Log Washer |
||-|||
| Water Usage | Laag | High | Moderate |
| Fines Loss | Minimal | Hoër | Moderate |
| Kapasiteit | Medium | High | High |
| Onderhoud | Laag | Moderate | High |

Seleksie-oorwegings:
- Materiaal tipe (grootte, klei inhoud).
- Required Output (ton/uur).
- Water Availability & Recycling System.

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