Filter Press
also known as plate and frame filter press
A filter press clamps a stack of plates carrying filter cloths and pumps slurry into the resulting chambers under pressure, usually 0.6 to 1.5 MPa. Solids fill each chamber as a cake while filtrate passes through the cloth and out through the plate drainage channels. When chambers are full the press is opened and cakes are discharged one by one.
Why it matters in practice
Filter presses deliver the driest cakes and the clearest filtrates of any common dewatering device, which is why they dominate where cake moisture or filtrate clarity is the product specification. The price is batch operation, high labour on discharge, and cloth maintenance.
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Reference entry GL-FILTER-PRESS. Definitions on this page describe engineering practice in hydrometallurgical process design; they are not a substitute for test work on your own material.