Pickling facility and operation method of pickling facility

Patent metadata

Field	Value
Publication number	US-2021002774-A1
Application number	US-201816982905-A
Country	US
Kind code	A1
Filing date	Apr 16, 2018
Priority date	Apr 16, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

A pickling facility includes: a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.

First claim

1 . A pickling facility, comprising:
a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.

2 . The pickling facility according to claim 1 ,
wherein the conveyance speed decision part is configured to:
calculate the heat transfer coefficient from the measurement result of the at least one parameter obtained by the measurement part; and
decide the conveyance speed of the steel plate on the basis of the calculation result of the heat transfer coefficient.

3 . The pickling facility according to claim 1 , comprising:
a heat conductor forming at least a part of the reference surface; and a heat source disposed in contact with the heat conductor at an opposite side of the reference surface of the heat conductor, wherein the measurement part is configured to measure a temperature inside the heat conductor as one of the at least one parameter.

4 . The pickling facility according to claim 3 , comprising:
a heat insulator surrounding the heat conductor and the heat source.

5 . The pickling facility according to claim 3 , further comprising:
a structural body having a surface which faces the steel plate in the acid solution, wherein the surface of the structural body forms a part of the reference surface, and wherein the heat conductor is supported by the structural body such that the reference surface of the heat conductor faces the steel plate and is exposed to the acid solution.

6 . The pickling facility according to claim 5 ,
wherein the reference surface of the heat conductor faces the steel plate, the reference surface of the heat conductor being flush with the reference surface of the structural body.

7 . The pickling facility according to claim 5 ,
wherein the structural body includes a plate-shaped member disposed so as to face at least one of two surfaces of the steel plate.

8 . The pickling facility according to claim 5 ,
wherein the structural body includes a bottom portion of the pickling tank.

9 . The pickling facility according to claim 5 , comprising:
a member including an upper plate portion and a lower plate portion disposed so as to cover two surfaces of the steel plate, and a side plate portion disposed so as to connect the upper plate portion and the lower plate portion at at least one of opposite sides of the steel plate, wherein the structural body includes at least one of the upper plate portion or the lower plate portion.

10 . The pickling facility according to claim 3 ,
wherein the measurement part is configured to measure, as one of the at least one parameter, each of temperatures of at least two sites positioned at different distances from the reference surface inside the heat conductor, and wherein the conveyance speed decision part is configured to:
calculate the heat transfer coefficient from a measurement result of the at least one parameter of each of the sites obtained by the measurement part; and
decide the conveyance speed of the steel plate on the basis of a calculation result of the heat transfer coefficient.

11 . The pickling facility according to claim 3 ,
wherein a cross-sectional area of the heat conductor taken orthogonal to a direction connecting the heat source and the reference surface of the heat conductor at a temperature measurement position by the measurement part in the direction is smaller than an area of the reference surface of the heat conductor.

12 . The pickling facility according to claim 1 ,
wherein the measurement part is configured to measure the at least one parameter at each of at least two positions which are different from one another in a plate width direction of the steel plate, and wherein the conveyance speed decision part is configured to decide the conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter obtained at each of the at least two positions.

13 . The pickling facility according to claim 1 ,
wherein the measurement part is configured to measure the at least one parameter at each of at least two positions which are different from one another in a conveyance direction of the steel plate, and wherein the conveyance speed decision part is configured to decide the conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter obtained at each of the at least two positions.

14 . A method of operating a pickling facility which comprises:
a pickling tank for storing an acid solution; and a conveyance part for continuously conveying a steel plate immersed in the acid solution, the method comprising:
a step of measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and
a step of deciding a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.

Assignees

• Primetals Tech Japan Ltd

Inventors

• Tsuji Kosei
• Nakatsuka Ryusuke
• Yoshikawa Masashi
• Nanba Shinji

Classifications

• C23G3/021 Primary

  by dipping · CPC title

• C23G1/08

  Iron or steel · CPC title

• B08B2203/007

  Heating the liquid · CPC title

• B08B3/041

  Cleaning travelling work · CPC title

• C23G3/027

  Associated apparatus, e.g. for pretreating or after-treating · CPC title