Centrifugal Filters 42 Solids that form a porous cake can be separated from liquids in a filtering centrifuge. Slurry is fed to a rotating basket having a slotted or perforated wall covered with a filter medium such as canvas or metal cloth. Pressure resulting from the centrifugal action forces the liquor through the filter medium, leaving the solids behind. If the feed to the basket is then shut off and the cake of solids spun for a short time, much of the residual liquid in the cake drains off the particles, leaving the solids much "drier" than those from a filter press or vacuum filter. When the filtered material must subsequently be dried by thermal means, considerable savings may result from the use of a centrifuge.