Transport roll regeneration method, steel sheet production method, and transport roll regeneration device

Abstract

To provide a transport roll regeneration method, a steel sheet production method, and a transport roll regeneration device with which an adhering substance on the outer peripheral surface of a transport roll can be efficiently removed.SOLUTION: A transport roll regeneration method is for regenerating a transport roll provided in an annealing furnace for transporting a steel sheet. An outer peripheral surface of the transport roll is composed of ceramic, and an adhering substance on the outer peripheral surface of the transport roll is removed by bringing an alkaline aqueous solution into contact with the outer peripheral surface of the transport roll.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a transport roll regenerating method, a steel plate manufacturing method, and a transport roll regenerating device. [Background technology]

[0002] 2. Description of the Related Art A method for regenerating a transport roll that transports a steel sheet in an annealing furnace is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-285920 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is preferable that the above-mentioned method for regenerating a transport roll can efficiently remove deposits from the outer peripheral surface of the transport roll.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a conveying roll regenerating method, a steel plate manufacturing method, and a conveying roll regenerating device that can efficiently remove deposits from the outer peripheral surface of a conveying roll. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] A method for regenerating a transport roll provided in an annealing furnace for transporting a steel sheet, comprising the steps of: The outer circumferential surface of the conveying roll is made of ceramic, A transport roll regenerating method comprising contacting the outer peripheral surface of the transport roll with an alkaline aqueous solution to remove deposits on the outer peripheral surface of the transport roll.

[0008] [2] The method for regenerating a conveying roll according to [1], wherein the temperature of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the conveying roll is 40° C. or higher.

[0009] [3] The method for regenerating a conveying roll according to [1], wherein the temperature of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the conveying roll is 60° C. or higher.

[0010] [4] The method for regenerating a transport roll according to any one of [1] to [3], wherein the concentration of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the transport roll is 3 mol / L or more.

[0011] [5] The method for regenerating a transport roll according to any one of [1] to [4], further comprising wiping off the deposits from the outer peripheral surface of the transport roll together with the alkaline aqueous solution.

[0012] [6] The method for regenerating a transport roll according to any one of [1] to [5], wherein the outer peripheral surface of the transport roll is brought into contact with the alkaline aqueous solution by immersing the transport roll in the alkaline aqueous solution stored in a container.

[0013] [7] The conveying roll regenerating method according to [6], wherein the conveying roll is rotated so that a predetermined portion of the outer peripheral surface of the conveying roll is repeatedly immersed and not immersed in the alkaline aqueous solution stored in the container.

[0014] [8] The method for regenerating a conveying roll described in [7], further comprising the steps of: rotating the conveying roll so that the specified portion of the outer peripheral surface of the conveying roll is repeatedly immersed and not immersed in the alkaline aqueous solution stored in the container; and wiping off the deposits together with the alkaline aqueous solution from the specified portion of the outer peripheral surface of the conveying roll in the not immersed state.

[0015] [9] A transport roll regeneration device that regenerates transport rolls provided in an annealing furnace for transporting steel sheets, comprising: A container for storing an alkaline aqueous solution; a support portion that rotatably supports the conveying roll so that a predetermined portion of the outer peripheral surface of the conveying roll can be repeatedly immersed and not immersed in the alkaline aqueous solution stored in the container.

[0016]

[10] The conveying roll recycling device described in [9], wherein the support section supports the conveying roll via a conveying roll rotating shaft.

[0017]

[11] The support portion has a notch portion provided in a side wall of the container, The conveying roll regenerating device described in

[10] , wherein the cutout portion receives the conveying roll rotating shaft.

[0018]

[12] The conveying roll recycling device described in

[11] , wherein the cutout portion has an arc-shaped contact portion that is in close contact with the lower surface of the conveying roll rotating shaft.

[0019]

[13] The transport roll regeneration device described in

[12] , wherein the contact portion has an elastic seal member.

[0020]

[14] The transport roll regenerating device according to any one of [9] to

[13] , further comprising a wiping member configured to wipe off deposits from the outer peripheral surface of the transport roll together with the alkaline aqueous solution.

[0021]

[15] The wiping member wipes off the adhesions together with the alkaline aqueous solution from the specified portion of the outer peripheral surface of the conveying roll in the non-immersed state by rotating the conveying roll so that the specified portion of the outer peripheral surface of the conveying roll is repeatedly immersed and non-immersed in the alkaline aqueous solution stored in the container.

[0022]

[16] A steel sheet manufacturing method, comprising: providing a conveying roll regenerated by the conveying roll regenerating method according to any one of [1] to [8] or the conveying roll regenerating device according to any one of [9] to

[15] in the annealing furnace; and conveying the steel sheet by the conveying roll. Effect of the Invention

[0023] According to the present invention, it is possible to provide a transport roll regenerating method, a steel plate manufacturing method, and a transport roll regenerating device that can efficiently remove deposits from the outer peripheral surface of a transport roll. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a conceptual diagram showing a steel sheet manufacturing method according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an external view showing a transport roll regenerating device for the transport roll shown in FIG. [Diagram 3] 4 is a graph showing the relationship between the concentration and temperature of an aqueous alkaline solution and the amount of removed deposits, measured in the examples. [Figure 4] 1 is a graph showing the relationship between the amount of removed deposits and the time of immersion in an alkaline aqueous solution and the presence or absence of wiping, measured in the examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0026] As shown in Figures 1 and 2, in one embodiment of the present invention, a transport roll regeneration device 1 is a transport roll 4 that regenerates a steel sheet 3 in an annealing furnace 2, and has a container 6 for storing an alkaline aqueous solution 5, and a support part 7 for rotatably supporting the transport roll 4 so that a predetermined portion of the outer circumferential surface 4a of the transport roll 4 can be repeatedly immersed and not immersed in the alkaline aqueous solution 5 stored in the container 6.

[0027] According to the above configuration, while the transport roll 4 is supported by the support portion 7, the transport roll 4 is rotated so that a predetermined portion of the outer circumferential surface 4a of the transport roll 4 is alternately immersed and not immersed in the alkaline aqueous solution 5 stored in the container 6, thereby preventing the alkaline aqueous solution 5 from staying in the predetermined portion, and therefore removing deposits on the outer circumferential surface 4a of the transport roll 4. Therefore, deposits on the outer circumferential surface 4a of the transport roll 4 can be efficiently removed.

[0028] The support section 7 supports the transport roll 4 via the transport roll rotating shaft 8. According to the above-mentioned configuration, the transport roll 4 can be supported at a position different from the outer peripheral surface 4a, so that deposits can be removed from the outer peripheral surface 4a of the transport roll 4.

[0029] The support portion 7 has a notch portion 7a provided in the side wall 6a of the container 6, and the notch portion 7a receives the transport roll rotating shaft 8. According to the above configuration, the transport roll 4 can be easily supported with a simple structure.

[0030] The cutout portion 7a has an arc-shaped contact portion 7a1 that contacts closely with the lower surface of the transport roll rotating shaft 8. According to the above configuration, the contact portion 7a1 can prevent the alkaline aqueous solution 5 from leaking from the cutout portion 7a, so the liquid level 5a of the alkaline aqueous solution 5 can be set higher accordingly, and as a result, the outer circumferential surface 4a of the transport roll 4 can be immersed deeper accordingly. Therefore, the deposits on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0031] The cutout portion 7a has a U-shape. According to the above-mentioned configuration, the transport roll 4 can be easily disposed in and removed from the container 6.

[0032] The close contact portion 7a1 may have an elastic seal member such as silicone rubber, etc. According to the above-mentioned configuration, the elastic seal member can further prevent the alkaline aqueous solution 5 from leaking from the cutout portion 7a.

[0033] The support portion 7 has a bearing portion 7b that contacts the entire circumference of the transport roll rotating shaft 8. According to the above configuration, the bearing portion 7b can stably support the transport roll 4 via the transport roll rotating shaft 8. The bearing portion 7b can be formed of, for example, a bearing.

[0034] The transport roll recycling device 1 has a first support part 7 that supports the transport roll 4 on one side in the axial direction, and a second support part 7 that supports the transport roll 4 on the other side in the axial direction, and more specifically, has a first support part 7 that supports the transport roll 4 via a first transport roll rotating shaft 8 provided on one side in the axial direction, and a second support part 7 that supports the transport roll 4 via a second transport roll rotating shaft 8 provided on the other side in the axial direction. According to the above configuration, the transport roll 4 can be supported more stably by the first support part 7 and the second support part 7.

[0035] The transport roll regenerating device 1 has a wiping member 9 that wipes off deposits from the outer peripheral surface 4a of the transport roll 4 together with the alkaline aqueous solution 5. According to the above configuration, deposits on the outer peripheral surface 4a of the transport roll 4 can be more efficiently removed by the wiping member 9. The wiping member 9 is formed of, for example, an abrasive brush.

[0036] The wiping member 9 wipes off the deposits from the non-immersed predetermined portion of the outer circumferential surface 4a of the transport roll 4 together with the alkaline aqueous solution 5 by rotating the transport roll 4 so that the predetermined portion of the outer circumferential surface 4a of the transport roll 4 is repeatedly immersed in and not immersed in the alkaline aqueous solution 5 stored in the container 6. According to the above configuration, by repeatedly immersing the outer circumferential surface 4a of the transport roll 4 in the alkaline aqueous solution 5 and wiping it off, the deposits on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0037] As shown in Figures 1 and 2, in one embodiment of the present invention, the transport roll regeneration method is a transport roll regeneration method for regenerating a transport roll 4 that transports a steel sheet 3 in an annealing furnace 2, in which an outer peripheral surface 4a of the transport roll 4 is formed of ceramic, and adhesions to the outer peripheral surface 4a of the transport roll 4 are removed by contacting the outer peripheral surface 4a of the transport roll 4 with an alkaline aqueous solution 5.

[0038] According to the above configuration, by forming the outer circumferential surface 4a of the transport roll 4 from ceramic, it is possible to suppress adhesion of deposits such as glass originating from the steel sheet 3 to the outer circumferential surface 4a of the transport roll 4 when the steel sheet 3 is transported in the annealing furnace 2. In addition, for example, by using the above-mentioned transport roll regenerating device 1, the alkaline aqueous solution 5 is brought into contact with the outer circumferential surface 4a of the transport roll 4, whereby the deposits can be efficiently removed from the ceramic. Therefore, the deposits on the outer circumferential surface 4a of the transport roll 4 can be efficiently removed.

[0039] The temperature of the alkaline aqueous solution 5 when it is brought into contact with the outer circumferential surface 4a of the transport roll 4 may be 40° C. or higher. According to the above-mentioned configuration, the reaction between the deposit and the alkaline aqueous solution 5 is promoted, and the deposit on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0040] The temperature of the alkaline aqueous solution 5 when it is brought into contact with the outer circumferential surface 4a of the transport roll 4 may be 60° C. or higher. According to the above-mentioned configuration, the reaction between the deposits and the alkaline aqueous solution 5 is further promoted, and the deposits on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0041] The concentration of the alkaline aqueous solution 5 may be 3 mol / L or more when it is brought into contact with the outer circumferential surface 4a of the transport roll 4. According to the above-mentioned configuration, the reaction between the deposit and the alkaline aqueous solution 5 is further promoted, and the deposit on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0042] The transport roll regenerating method involves wiping off the deposits from the outer peripheral surface 4a of the transport roll 4 with the alkaline aqueous solution 5. According to the above-mentioned configuration, the deposits on the outer peripheral surface 4a of the transport roll 4 can be removed more efficiently by wiping.

[0043] In the method for regenerating the transport roll, the transport roll 4 is immersed in the alkaline aqueous solution 5 stored in a container 6, thereby bringing the alkaline aqueous solution 5 into contact with the outer peripheral surface 4a of the transport roll 4. According to the above-mentioned configuration, it is easy to bring the alkaline aqueous solution 5 into contact with the outer peripheral surface 4a of the transport roll 4, and it is also easy to control the temperature and concentration of the alkaline aqueous solution 5 stored in the container 6, so that the deposits on the outer peripheral surface 4a of the transport roll 4 can be removed more efficiently.

[0044] In the transport roll regeneration method, the transport roll 4 is rotated so that a predetermined portion of the outer peripheral surface 4a of the transport roll 4 is repeatedly immersed in and not immersed in the alkaline aqueous solution 5 stored in the container 6. According to the above-mentioned configuration, by repeatedly immersing and not immersing the predetermined portion, the alkaline aqueous solution 5 can be prevented from remaining in the predetermined portion, so that the deposits on the outer peripheral surface 4a of the transport roll 4 can be removed more efficiently.

[0045] In the transport roll regenerating method, the transport roll 4 is rotated so that the above-mentioned predetermined portion of the outer circumferential surface 4a of the transport roll 4 is repeatedly immersed and not immersed in the alkaline aqueous solution 5 stored in the container 6, while the deposits are wiped off from the above-mentioned predetermined portion of the outer circumferential surface 4a of the transport roll 4 in the not-immersed state together with the alkaline aqueous solution 5. According to the above-mentioned configuration, since the outer circumferential surface 4a of the transport roll 4 is repeatedly immersed in the alkaline aqueous solution 5 and wiped off, the deposits on the outer circumferential surface 4a of the transport roll 4 can be removed more efficiently.

[0046] 1 and 2, in one embodiment of the present invention, a steel sheet manufacturing method includes providing a transport roll 4 regenerated by a transport roll regenerating device 1 or a regeneration method in an annealing furnace 2, and transporting a steel sheet 3 in the direction of a dashed arrow in Fig. 1 by the transport roll 4. According to the above configuration, the steel sheet 3 can be transported in the annealing furnace 2 by the transport roll 4 from which deposits have been removed from the outer circumferential surface 4a, so that a steel sheet 3 with fewer scratches due to deposits can be efficiently manufactured.

[0047] In this embodiment of the steel sheet manufacturing method, a plurality of transport rolls 4 are provided in the annealing furnace 2, and the steel sheet 3 is transported by the plurality of transport rolls 4. However, the present invention is not limited to this, and a configuration in which a single transport roll 4 is provided in the annealing furnace 2, and the steel sheet 3 is transported by the single transport roll 4 may also be used.

[0048] In the steel sheet manufacturing method, a phosphate-based chemical solution is applied to a steel sheet 3 before the steel sheet 3 is transported into an annealing furnace 2. After coating, the steel sheet 3 is transported by rolls 4 in the annealing furnace 2 and undergoes the process of drying the chemical solution and annealing. According to the above configuration, a steel sheet 3 of desired quality can be manufactured.

[0049] In the present embodiment, the steel sheet manufacturing method involves applying a chemical solution to the steel sheet 3 by a coater 10 having a coating roll 10a, but is not limited thereto. In the present embodiment, the coater 10 has coating rolls 10a on both sides of the steel sheet 3, but is not limited thereto, and may have a coating roll 10a on one side of the steel sheet 3.

[0050] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. EXAMPLES

[0051] The conveying roll shown in Fig. 1 was regenerated offline using the conveying roll regeneration device shown in Fig. 2. The regeneration was performed by repeatedly immersing the conveying roll in an alkaline aqueous solution and wiping the ceramic outer surface of the conveying roll by rotating the conveying roll immersed in the alkaline aqueous solution. The wiping member was made of an abrasive brush, and the brush material was chemical fiber, typically PVC (polyvinyl chloride), which has strong alkali resistance. By using a conveying roll that was immersed in an alkaline aqueous solution and wiped to remove deposits, the surface defects of the steel sheet that occurred during the drying of the chemical solution and during transportation during the annealing process, which had previously occurred, were improved, and the number (rate) of defective products, which was 100% compared to the conventional case, was reduced to 10%. In the case of immersion in an alkaline aqueous solution without wiping, the number was reduced to 30%.

[0052] The relationship between the concentration and temperature of the alkaline aqueous solution measured at that time and the amount of deposits removed is shown in Figure 3. As shown in Figure 3, under the conditions used in this study, a deposit removal effect was confirmed at temperatures of 40 degrees or higher for all concentrations. It was also confirmed that a significant deposit removal effect was obtained at temperatures of 60 degrees or higher. It was also confirmed that a significant deposit removal effect was obtained at concentrations of 3 mol / L or higher.

[0053] The relationship between the immersion time in the alkaline aqueous solution and the amount of removed deposits measured at this time is shown in Figure 4. Figure 4 also shows the measurement results when the sample was immersed only without wiping. As shown in Figure 4, when there was no wiping, the amount of removed deposits decreased with the passage of immersion time, but by wiping, this decrease could be suppressed. This is presumably due to the formation of a protective layer on the surface of the transport roll. When the alkaline aqueous solution stored in the container was stirred, no suppressive effect on the decrease in the amount of removed deposits was observed, but by wiping as described above, it was possible to suppress the decrease in the amount of removed deposits. This is presumably due to the protective layer being removed by wiping. [Explanation of symbols]

[0054] 1. Transport roll regeneration device 2 Annealing furnace 3 steel plate 4 Transport roll 4a Outer surface 5. Alkaline solution 5a Liquid level 6 containers 6a side wall 7 Support part 7a Cutout 7a1 Close contact 7b Bearing part 8 Rotating shaft for transport roll 9 Wiping material 10 Coater 10a Coating roll

Claims

1. A method for regenerating a transport roll provided in an annealing furnace for transporting a steel sheet, comprising the steps of: The outer circumferential surface of the conveying roll is made of ceramic, A transport roll regenerating method comprising contacting the outer peripheral surface of the transport roll with an alkaline aqueous solution to remove deposits on the outer peripheral surface of the transport roll.

2. 2. The method for regenerating a transport roll according to claim 1, wherein the temperature of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the transport roll is 40 degrees or higher.

3. 2. The method for regenerating a transport roll according to claim 1, wherein the temperature of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the transport roll is 60 degrees or higher.

4. 2. The method for regenerating a transport roll according to claim 1, wherein the concentration of the alkaline aqueous solution when brought into contact with the outer peripheral surface of the transport roll is 3 mol / L or more.

5. The method for regenerating a transport roll according to claim 1 , further comprising wiping off the deposits from the outer peripheral surface of the transport roll together with the alkaline aqueous solution.

6. The method for regenerating a transport roll according to claim 1 , further comprising the step of contacting the outer peripheral surface of the transport roll with the alkaline aqueous solution by immersing the transport roll in the alkaline aqueous solution stored in a container.

7. The transport roll regenerating method according to claim 6, wherein the transport roll is rotated so that a predetermined portion of the outer circumferential surface of the transport roll is alternately immersed in and not immersed in the alkaline aqueous solution stored in the container.

8. 8. The method for regenerating a conveying roll according to claim 7, further comprising the steps of: rotating the conveying roll so that the specified portion of the outer peripheral surface of the conveying roll is repeatedly immersed and not immersed in the alkaline aqueous solution stored in the container; and wiping off the deposits from the specified portion of the outer peripheral surface of the conveying roll in the not-immersed state together with the alkaline aqueous solution.

9. A transport roll regeneration device that regenerates transport rolls provided in an annealing furnace for transporting steel sheets, comprising: A container for storing an alkaline aqueous solution; a support portion that rotatably supports the conveying roll so that a predetermined portion of the outer peripheral surface of the conveying roll can be repeatedly immersed and not immersed in the alkaline aqueous solution stored in the container.

10. The transport roll recycling device according to claim 9 , wherein the support section supports the transport roll via a transport roll rotation shaft.

11. The support portion has a notch portion provided in a side wall of the container, The transport roll regenerating device according to claim 10 , wherein the cutout portion receives the transport roll rotating shaft.

12. The transport roll recycling device according to claim 11 , wherein the cutout portion has an arc-shaped contact portion that contacts closely with a lower surface of the transport roll rotating shaft.

13. The transport roll regenerating device according to claim 12, wherein the sealing portion has an elastic seal member.

14. The transport roll regenerating device according to claim 9 , further comprising a wiping member configured to wipe off deposits from the outer circumferential surface of the transport roll together with the alkaline aqueous solution.

15. The conveying roll regenerating device of claim 14, wherein the wiping member wipes the adhesions together with the alkaline aqueous solution from the specified portion of the outer peripheral surface of the conveying roll in the non-immersed state by rotating the conveying roll so that the specified portion of the outer peripheral surface of the conveying roll is repeatedly immersed and non-immersed in the alkaline aqueous solution stored in the container.

16. A steel sheet manufacturing method, comprising providing a transport roll regenerated by the transport roll regenerating method according to claim 1 or the transport roll regenerating device according to claim 9 in the annealing furnace, and transporting the steel sheet by the transport roll.

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