Sand washer is a kind of washing equipment for sand and gravel (artificial sand, natural sand), which can make the sand cleaner with higher quality. It is widely used in the construction of sand and gravel quarries, mines, building materials, transportation, chemical industry, water conservancy and hydropower, concrete mixing station and other industries. At present, there are various models of sand washers, the common ones like spiral sand washer, wheel sand washer, rotary drum sand washer, vibrating sand washer, dredging bucket sand washer, etc.
Their working principles and features as follows
1. Spiral Sand Washer
Spiral sand washer is to use the buoyancy effect of water for classifying, with the principle of different specific gravity of solid particles, thus their settling speed in liquid is also different.
The machine rotor adopts the central structure, and the spiral blades are installed on the central shaft, which is connected to the central shaft by the speed reducer for work. The spiral sand washer needs to be installed at an inclination, the lower part of the water tank is surrounded by three sides of the weir plate to form a sedimentation pool, the head of the spiral is immersed in the sedimentation pool, the spiral is driven by the electric motor through the reducer to rotate continuously.
2. Wheel sand washer
The motor drives the impeller slowly through the v-belt, reducer and gears, and the sand enters through the feeding trough, tumbles under the impeller and grinds each other to remove the impurities covering the surface of sand and gravel, and at the same time destroys the water vapor layer covering the sand for dewatering.
At the same time, water is added to form a strong water flow to take away impurities with small specific gravity in time and discharge from the overflow outlet washing trough. The clean sand is taken away by the wheel, and finally the sand is poured into the discharge tank from the rotating impeller, completing the cleaning action of sand and gravel.
Due to the transmission part of the wheel sand washer is isolated from water and sand, so its failure rate is much lower than other common sand washers, it is a good choice for sand washing plant.