Method and device for pickling hot-rolled special steel strips

Details Method and device for pickling hot-rolled special steel strips Method and device for pickling hot-rolled special steel strips

2005-01-18

2005-01-18

Kornakov, M. (Department: 1746)

Cleaning and liquid contact with solids

Processes

Metal base work, acid treating

C134S002000, C134S003000, C134S015000, C134S026000, C134S028000

Reexamination Certificate

active

06843860

ABSTRACT:
The invention relates to a method for pickling hot-rolled special steel strips (1) having an austenite, ferrite and/or martensite structure. The inventive method is carried out in a pickling line (7) with pickling sections (8) containing acids and rinsing sections (9) containing rinsing water (15). The aim of the invention is to provide a method that does not require an additional stretch-leveling step for descaling. The costs for pickling are reduced by pickling the hot-rolled special steel strip (1) in the pickling sections (8) with hydrochloric acid (13) and rinsing it in the first rinsing sections (9) with azotic acid (14) or an equivalent substitute pickling medium (14b) and treating it in further rinsing sections (9) with rinsing water (15).

REFERENCES:
patent: 2987425 (1961-06-01), Elliott
patent: 5131126 (1992-07-01), Katsuki et al.
patent: 5821212 (1998-10-01), Peterson
patent: 60-63390 (1985-04-01), None

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