Pickling method and pickling device



【課題】煩雑な操作をせずに且つ低コストで、鋼材の表面に付着したスケールを除去する酸洗処理に際し、NO X ガスの発生を確実に防止ないし抑制できる酸洗方法、およびこれに用いる酸洗装置を提供する。 【解決手段】脱スケールすべき鋼材Mを少なくとも硝酸を含む酸洗液Lに浸漬して酸洗する方法であって、係る酸洗液Lの温度を28℃以下に保つ、酸洗方法。また、硝酸を含み且つ上記鋼材Mを浸漬させる酸洗液Lが入れられた液槽2と、係る液槽2中の酸洗液Lを冷却するための熱交換器6および冷却ユニット10からなる冷却手段と、を備えている、酸洗装置1も含まれる。 【選択図】 図1
<P>PROBLEM TO BE SOLVED: To provide a pickling method with which, when scale stuck to the surface of a steel member is subjected to pickling treatment at a low cost without performing a complicated operation, production of NO<SB>X</SB>gas can be securely prevented or suppressed, and to provide a pickling device used therefor. <P>SOLUTION: Disclosed is a pickling method with which the steel member M to be subjected to descaling is immersed into a pickling liquid L at least comprising nitric acid so as to be pickled. In the method, the temperature of the pickling liquid L is held to ≤28°C. Also disclosed is a pickling device 1 provided with: a liquid tank 2 where the pickling liquid L which contains nitric acid and in which the steel member M is immersed is charged; and a cooling means composed of a heat exchanger 6 and a cooling unit 10 for cooling the pickling liquid L in the liquid tank 2. <P>COPYRIGHT: (C)2009,JPO&INPIT




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Cited By (1)

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    JP-2011162812-AAugust 25, 2011Nisshin Steel Co Ltd, 日新製鋼株式会社Method for pickling operation of stainless steel strip