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

Características clave & Principio de funcionamiento:
1. Estructura:
- 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 (arcilla, polvo, materia organica) are flushed out through the overflow weir.
- Clean sand is discharged at the top after dewatering.

3. Ventajas:
- 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. Aplicaciones:
- Washing natural sand or crushed sand for construction (concreto, mortero).
- R

ving silt/clay from aggregates in quarries.
- Procesamiento de minerales (p.ej., mineral de hierro, arena de sílice).

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:
| Característica | Screw Washer | Bucket Wheel Washer | Lavadora de troncos |
||-|||
| Uso de agua | Bajo | Alto | Moderado |
| Fines Loss | Minimal | Más alto | Moderado |
| Capacidad | Medium | Alto | Alto |
| Mantenimiento | Bajo | Moderado | Alto |

Consideraciones de selección:
- Tipo de material (tamaño, contenido de arcilla).
- Required Output (toneladas/hora).
- Water Availability & Recycling System.

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