Patent ID: 9399224
Filing Date: 2016-07-26
CPC Classification: B03B

Claim Text:
1. An underwater crushed material sorting unit comprising: a container containing a bottom layer of a heavy water-immiscible liquid, an intermediate layer of an aqueous salt solution and a top layer of a light water-immiscible liquid, wherein the heavy water-immiscible liquid is selected to have a higher density than the aqueous salt solution, the aqueous salt solution is selected to have a higher density than the light water-immiscible liquid and the light water-immiscible liquid is selected to have a higher density than sea water to maintain the intermediate layer on top of the bottom layer, the top layer on top of the intermediate layer and the top layer within the container, and wherein the container is arranged to receive crushed material having a weight distribution; and at least one discharger arranged to remove at least one respective part of the material from at least one respective layer.