Method for preparing a precoat on the surface of the filter medium of a polishing filter, polishing filter and use of a polishing filter

摘要

Method for preparing a precoat (3) on the surface of the filter medium (2) of a polishing filter (1), polishing filter (1) and use of a polishing filter. The essential feature in the invention is that in the polishing filter (1), the precoat (3) is formed either exclusively or jointly from the underflow created in the separation process.