The hydrosander is used for dewatering and removing the slit content from wash sand. The large diameter bucket wheel, long fines recovery spiral and low power requirements enables these units to be both efficient and cost-effective.
Each hydrosander has a contra-flow screw recovery spiral fitted in the claim are of the tank. This spiral plays a very important role when the product to be processed contains a high percentage of fine or lower density particles. Depending on the waterfowl rate a certain percentage of bottom fines can escape first pass recovery and they are then influenced by the water flow along the settlement tank towards the weir system at the opposite end. As these fine particles move along they gravitate towards the tank bottom and into contact with the spiral blades. These influence a contra-flow system nudging the escaping fines back into the recovery buckets. In general the contra-flow spiral system maximises efficiency of particle recovery and overall output.
