Vacuum Ceramic Disc Filter

The Vacuum Disk Filter consists essentially of a slowly revolving drum, the lower half of whose circumference is submerged in the pulp to be filtered. The filtering medium is applied all around the periphery, which is divided up into a number of separate segments, more or less isolated from one another.

The vacuum is applied through the axle bearing by means of a header valve so arranged that at a certain point in the revolution of the drum the vacuum connection is severed. Compressed air is admitted under the ceramic filter medium which serves to detach the cake and allow it to drop onto a metal deflector or scraper, whence it slides down to the residue discharge launder. As the newly formed and adherent cake rises from the bath of slime pulp it comes under the action of a number of atomizing spray nozzles by means of which the wash liquor is distributed over the surface and is at once absorbed, tending to act as a wash for displacing the value-bearing solution.