The aim of the invention is to create a compact circulating grinding plant
comprising a product bed comminution roller mill or roller press and a
sifter device, in which the problem of mechanically transporting the
grinding product that is directed through the circuit is minimized. Said
aim is achieved by a circulating grinding plant in which a static cascade
sifter is disposed below the gap of the roller press while a subsequent
sifter, particularly a dynamic rod basket sifter, is disposed above said
roller press. The sifting product discharge area of the static cascade
sifter is connected to the sifting air and sifting product inlet of the
subsequent sifter via an ascending duct which pneumatically conveys the
product.