Method for preparing a precoat on the surface of the filter medium of a polishing filter, polishing filter and use of a polishing filter
AssigneeOutotec (Filters) Oy
InventorsLeena Tanttu, Janne Kauppi, Yrjo Oinonen
Life of this patent
Estimating the term…
Abstract
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.
Claims16
1-12. (canceled)
A method comprising forming a precoat on the surface of a filter medium of a polishing filter, where the precoat is at least partially formed of the underflow of at least one of a thickener and a clarifier, and where the precoat serves as a filter aid medium in polishing filtration of the overflow of said at least one of a thickener and a clarifier.
A polishing filter having a filter medium comprising a precoat, where the precoat is at least partially formed of the undertow of at least one of a thickener and a clarifier, and where the precoat serves as a filter aid medium in polishing filtration of the overflow of said at least one of a thickener and clarifier.
A method comprising using a polishing filter for polishing filtration of the overflow of at least one of a thickener or clarifier, where a precoat is formed on the surface of a filter medium of the polishing filter, and is at least partially formed of an underflow of the at least one of a thickener and clarifier.
Dependencies are inferred from the claim text.