公开(公告)号：US11162177B2

公开(公告)日：2021-11-02

申请号：US15756725

申请日：2017-02-22

Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.

Inventor： Ryusuke Nakatsuka ,  Kosei Tsuji ,  Hideaki Suemori ,  Koichi Nakamura

IPC: C23G3/02 ,  C23G1/08 ,  B08B3/04 ,  B08B3/08 ,  B08B3/10

Abstract: To prevent over-pickling during pickling pause, shorten the time required to switch between pickling operation and pickling pause, and heat acid solution efficiently, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation device configured to circulate the acid solution between the pickling tank and the circulation tank; a control device configured to withdraw the steel strip from the acid solution; and a guide plate disposed in the pickling tank and configured to guide the acid solution circulated in the pickling tank by the acid-solution circulation device to the heat exchanger.

公开(公告)号：US10711353B2

公开(公告)日：2020-07-14

申请号：US15756699

申请日：2017-02-22

Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.

Inventor： Ryusuke Nakatsuka ,  Kosei Tsuji ,  Hideaki Suemori ,  Koichi Nakamura

IPC: C23G3/02 ,  C23G1/08

Abstract: To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device configured to control the acid-solution circulation device to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height of the steel strip.