Two-stage Pusher Centrifuge is a kind of perforated basket centrifuge, both continuous and effective. The mixture to be separated is fed through the feeding pipe and the distributor continuously and evenly into the first stage basket. Most of the mother-liquor in the feed, acted on by centrifugal force, departs through the sieves into the liquor-collecting casing where it will be discharged out of the machine. The first stage basket rotates and reciprocate, pushing the formed product cake into the second stage basket .The cake can have sufficient retardation in the centrifuge with being acted on by more centrifugal force, and therefore, the desired humidity of the cake can be guaranteed. Afterwards, the cake is continuously discharged out of the basket.
In case of high purity for the solid product, the effective washing can be carried out in the centrifuge. If necessary, the
washing agent and the mother-liquor can be discharged separately.

·Crushing and Washing
The 'four washings and three crushings' production process represents the highest level of refined salt produced by the Chinese crushing method, of which four washes are:
——One-stage spiral washing
——Secondary spiral washing
——Vertical mixing and washing
- countercurrent washing
Three powder is:
- primary crush
- wet crushing
- dry crushing
Through the reasonable combination of wet pulverization and dry pulverization, various washing methods are matched to each other to ensure that the product salt reaches a high quality.