Method and arrangement for regenerating a contaminated metal bath

Abstract

A method and a system for regenerating a metal bath contaminated by mixed crystals, particularly a tin bath (17) in a hot-dip coating process. A partial stream of the tin bath (17) is removed from the coating tank (15) and is first of all heated above its liquidus temperature in a heating unit (24). Subsequently, the tin bath is conducted over a cooling unit (27) and, while flowing through a filter (29), is cleaned of mixed crystals coming down as a result of the cooling. The filter 29 is a ceramic foam filter made of silicon carbide. Subsequently, the regenerated tin bath (17a) is heated in a melting tank to process temperature, and returned from there to the coating tank (15).

Dependencies are inferred from the claim text.