US 11,945,008 B2
Roller cleaning method and roller cleaning machine
Kathrin Eckhard, Alfter (DE); Olaf Güßgen, Cologne (DE); and Frank Hirschmann, Nettetal (DE)
Assigned to Hydro Aluminum Rolled Products GmbH, Grevenbroich (DE)
Filed by Kathrin Eckhard, Alfter (DE); Olaf Güßgen, Cologne (DE); and Frank Hirschmann, Nettetal (DE)
Filed on Sep. 25, 2020, as Appl. No. 17/032,870.
Application 17/032,870 is a continuation of application No. PCT/EP2019/057728, filed on Mar. 27, 2019.
Claims priority of application No. 18164316 (EP), filed on Mar. 27, 2018.
Prior Publication US 2021/0008605 A1, Jan. 14, 2021
Int. Cl. B08B 3/08 (2006.01); B08B 1/00 (2006.01); B08B 7/04 (2006.01); B08B 13/00 (2006.01); B21B 45/02 (2006.01)
CPC B08B 3/08 (2013.01) [B08B 1/002 (2013.01); B08B 7/04 (2013.01); B08B 13/00 (2013.01); B21B 45/0275 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for cleaning rolls used in metal strip processing, comprising:
first cleaning a roll surface of a roll with a first alkaline washing liquid comprising an aqueous alkali metal hydroxide or an alkaline earth metal hydroxide,
second cleaning the roll surface with at least one second alkaline washing liquid comprising an aqueous alkali metal hydroxide or an alkaline earth metal hydroxide, whereby the first alkaline washing liquid has a higher concentration of hydroxide ions than the at least one second alkaline washing liquid, rinsing the roll surface with water upon completion of the first cleaning and the second cleaning.