Spiral DeWaterer

Metso Spiral Dewaterer consists basically of an open trough with arrangements for collection of the products. 

The inlet flow is evenly spread out through a feed distributor. Coarse material settles and is continuously removed by means of the transport spiral. The material will be dewatered by drainage in the upper part of the spiral before discharge. 

The discharge launder for the dewatered material is easily adjusted between two positions, allowing alternative discharge into two separate bins. 

Washing effluents coming from the steel industry with high flows and a low to moderate content of well defined solids like mill scales and slag has been proven optimal for the spiral dewaterer. 

In the sedimentation tank the wash water is reclaimed and sent back to the washing operation again. 

The solids are removed by and dewatered in the discharge spiral and can be sent to recycling if this is considered of value.