CN115558978A - Repairing method of degreasing electrolytic tank - Google Patents
Repairing method of degreasing electrolytic tank Download PDFInfo
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- CN115558978A CN115558978A CN202211108006.1A CN202211108006A CN115558978A CN 115558978 A CN115558978 A CN 115558978A CN 202211108006 A CN202211108006 A CN 202211108006A CN 115558978 A CN115558978 A CN 115558978A
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- electrolytic cell
- repairing
- degreasing
- electrolytic
- rubber
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
Abstract
The embodiment of the application discloses a repairing method of a degreasing electrolytic cell, which relates to the technical field of steel cold rolling and comprises the following steps: 1) Dismantling the mechanical part of the electrolytic cell; 2) Building a scaffold; 3) Removing the old rubber plate in the electrolytic cell; 4) Cutting the electrode plate clamping groove at the bottom of the electrolytic cell, and then welding a new clamping groove lined with glue; 5) Repairing a matrix seriously corroded in the electrolytic cell; 6) Carrying out sand blasting and bottom material spraying on the electrolytic cell; 7) Brushing an adhesive in the electrolytic cell, and then carrying out rubber lining construction; 8) And (5) detecting the electrolytic cell, and finishing repairing after the electrolytic cell is detected to be qualified. The degreasing electrolytic tank can be systematically repaired, and the problem of liquid leakage caused by aging of lining glue of the electrolytic tank is effectively solved.
Description
Technical Field
The application relates to the technical field of steel cold rolling, in particular to a repairing method of a degreasing electrolytic tank.
Background
In the process of steel cold rolling production, an electrolytic bath at a cleaning section of a continuous annealing unit is an important component of the continuous annealing cleaning section, a medium in the electrolytic bath is a sodium hydroxide solution with the concentration of 2-4%, and the temperature is high and is 60-80 ℃ for a long time. Because the rubber lining layer of the tank body is aged and the leakage is serious, the normal production requirements can not be met after repeated repair. A repair method for degreasing and cleaning the electrolytic cell is urgently needed to prolong the service life of the electrolytic cell and stabilize production.
Disclosure of Invention
The application aims to provide a repairing method of a degreasing electrolytic cell, which aims to solve the technical problems in the prior art: namely how to solve the technical problem of leakage caused by aging of lining glue of the degreasing electrolytic cell at the cleaning section.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a first aspect of an embodiment of the present application provides a repairing method for a degreasing electrolytic cell, including the following steps:
1) Dismantling the mechanical part of the electrolytic cell;
2) Building a scaffold;
3) Dismantling an old rubber plate in the electrolytic cell;
4) Cutting the electrode plate clamping groove at the bottom of the electrolytic cell, and then welding a new clamping groove lined with glue;
5) Repairing a matrix seriously corroded in the electrolytic cell;
6) Carrying out sand blasting and bottom material spraying on the electrolytic bath;
7) Brushing an adhesive in the electrolytic cell, and then carrying out rubber lining construction; a (c)
8) And (5) detecting the electrolytic cell, and finishing repairing after the electrolytic cell is detected to be qualified.
In some embodiments, the dismantling of the mechanical part of the electrolytic cell in step 1) comprises dismantling sink rolls, electrode plates, upper clamping grooves, manholes and flanges in the cell, and simultaneously plugging all pipe orifice flanges connected with the cell body by using canvas.
In some embodiments, the step of removing the old slabs in the electrolytic cell in step 3) comprises: stripping the original old rubber plate of the electrolytic cell, and then polishing the old anticorrosion bonding layer.
In some embodiments, the repairing of the severely corroded substrates in the electrolytic cell in step 5) comprises: and (4) performing repair welding on the corroded part of the matrix, and after the repair welding is finished, performing overall polishing on the surface of the electrolytic cell.
In some embodiments, the repair welding method in step 5) is oxygen-cutting repair welding.
In some embodiments, the steel surface after grit blasting in step 6) should be painted or sprayed with a primer.
In some embodiments, the requirement for substrate surface roughness after grit blasting in step 6) is that the roughness should be greater than 50 μm.
In some embodiments, the rubber sheets in the electrolytic cell need to be cleaned with a cleaning agent before the adhesive is brushed in step 7).
In some embodiments, the detecting step in step 8) comprises: visual inspection, hardness inspection, anti-stripping strength inspection and electric spark inspection.
In some embodiments, when a crack is detected in step 8), the crack is repaired using a rubber block.
According to the technical scheme, the method has at least the following advantages and positive effects:
the repairing method of the degreasing electrolytic tank can repair the degreasing electrolytic tank systematically, and effectively solves the problem of liquid leakage caused by aging of lining glue of the electrolytic tank.
Drawings
To explain the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a process flow diagram of a method of reconditioning a degreasing electrolytic cell, in accordance with an embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "communicate", "mount", "connect", and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Please refer to fig. 1.
Fig. 1 is a process flow diagram of a repairing method of a degreasing electrolytic cell in an embodiment of the present application, and as shown in the figure, the repairing method of the degreasing electrolytic cell includes the following steps:
1) Dismantling the mechanical part of the electrolytic cell;
in the specific implementation process of this embodiment, it is necessary to remove sink roll, electrode plate, upper layer neck, manhole and flange in the tank, and simultaneously, all the pipe orifice flanges connected with the tank body are plugged with canvas.
2) Building a scaffold;
in the specific implementation process of the embodiment, a scaffold is built in the electrolytic cell and is sealed by canvas, so that the construction is convenient.
3) Removing the old rubber plate in the electrolytic cell;
in the specific implementation process of the embodiment, the original old rubber plate of the electrolytic bath at the cleaning section of the degreasing unit is peeled off, and the old anticorrosive adhesive layer is polished.
4) Cutting the electrode plate clamping groove at the bottom of the electrolytic cell, and then welding a new clamping groove lined with glue;
5) Repairing a matrix seriously corroded in the electrolytic cell;
in the implementation process of this embodiment, the repair of the severely corroded matrix in the electrolytic cell comprises the following steps: and (4) performing repair welding on the corroded part of the matrix, and after the repair welding is finished, performing overall polishing on the surface of the electrolytic cell.
In the repair welding process, the lowest temperature of the lining material is +15 ℃; the bottom layer material is preferably between +10 ℃ and +30 ℃ and at least 3 ℃ higher than the dew point of the air, e.g., between +5 ℃ and +10 ℃, and more than 5 ℃ higher than the dew point.
6) Carrying out sand blasting and bottom material spraying on the electrolytic cell;
in the practice of this example, the substrate surface roughness after grit blasting is required to be greater than 50 μm.
The steel surface after sand blasting treatment is brushed or sprayed with a primer, after the sand blasting treatment and primer brushing are finished, the dust on the surface is removed, and a second primer is thinly coated; if the part of the component needing to be lined with the rubber is always at the relative air humidity of 60 percent, the component can be brushed after sand blasting and cleaning; after brushing, the next coating should be applied after about 2 hours (20 ℃) or within the latest 4 weeks, e.g., within the latest 3 months for two coats. The dosage of each spraying: about 150g/m2.
7) Brushing an adhesive in the electrolytic cell, and then carrying out rubber lining construction;
in the specific implementation process of the embodiment, the rubber plate in the electrolytic bath needs to be cleaned by using a cleaning agent before the adhesive is brushed. The temperature of the rubber plate and the adhesive is not allowed to be lower than the ambient temperature during painting so as to prevent moisture in the air from condensing. This is particularly noted when the weather changes from cold to warm and humid; when the adhesive is applied, if the relative air humidity is more than 75%, the condensation phenomenon is also generated. At this time, the rubber plate is heated to above the ambient temperature before being coated with the adhesive, and an air dryer is additionally used; the rubber plate coated with the adhesive needs to be air-dried for 30 minutes before the rubber plate is rolled together with the isolation film; when the rubber plate is adhered under tension, the adhesive must be uniformly coated to prevent the phenomenon of accumulation no matter the temperature is high or low and the rubber plate is uniformly dried for more than 2 hours.
In the specific implementation process of the embodiment, during the rubber lining construction, the rubber plate coated with the adhesive is laid on the bottom layer, and then pressed lightly by hand; if the surface is smooth, the rubber plate is rolled on the bottom layer by a roller with the width of 30 mm; applying small rollers with the width of 3mm at the seams and corners to press and paste the seams and the corners with slight force; a layer of Kerabonit-VC-rubber plate with the thickness of 1.5mm is firstly pasted on the position where the rubber is not easy to line, and then the air drying time is uniformly more than 2 hours no matter the temperature is high or low. When the double-layer rubber lining is carried out, the upper surface of the lower layer rubber plate is polished before leaving a factory if possible; before coating the adhesive, removing dust and chalk marks on the surface; the adhered rubber surfaces should be painted with the adhesive twice separately.
8) And (5) detecting the electrolytic cell, and finishing repairing after the electrolytic cell is detected to be qualified.
In the specific implementation of the present embodiment,
the detection step comprises:
visual inspection: the liner is inspected for visually detectable defects such as bubbles, inclusions, roughness, cracks or other mechanical damage.
And (3) hardness detection: the detection standard is as follows: shore a =55 ± 5 at 23 ℃.
And (3) testing the anti-stripping strength: the samples used for the tests were lining samples prepared exactly according to the actual construction procedure and simultaneously with the actual construction. The earliest detection time was after 48 hours after the rubber lining. During detection, two cutting seams with the distance of 3cm and the length of 20cm and the depth of the bottom layer are cut from one edge of the sample plate, and then the cutting seams (with the length of 5cm generally) close to one end of the plate edge are peeled from the plate. This section was clamped perpendicular to the template on a spring scale and the tension used when the remaining section of cut strip was peeled (pulled) down evenly was recorded. The tensile force used at room temperature should be greater than 90 newtons.
Electric spark detection: the adopted models are as follows: and detecting by using an Elmed-Isotest-II-RT electric spark detector.
9) When a crack is detected in step 8), repairing the crack using a rubber block.
In the specific implementation process of the embodiment, the defective part of the liner is cut from the liner to the bottom layer, then a wider inclined surface is obliquely cut at the edge of the cut of the liner, a rubber block with proper size is taken, and the edge is also cut into a corresponding inclined surface to be supplemented on the cut of the liner.
If the diameter of the repaired part is less than 300mm, a layer of rubber plate is adhered on the repaired rubber block, the size of the rubber plate is based on the edge seam of the repaired block, and if a plurality of repaired blocks are arranged on a small area, the repaired blocks can be covered by a large rubber plate.
10 ) checking and accepting again according to step 8) after repair;
11 Removing a scaffold, cleaning sundries in the electrolytic cell, installing a sink roll, an electrode plate, an upper clamping groove, a manhole and a flange, and synchronously maintaining;
according to the technical scheme, the method has at least the following advantages and positive effects:
according to the repairing method of the degreasing electrolytic tank, the degreasing electrolytic tank can be systematically repaired, and the problem of liquid leakage caused by aging of lining glue of the electrolytic tank is effectively solved.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The repairing method of the degreasing electrolytic tank is characterized by comprising the following steps:
1) Dismantling the mechanical part of the electrolytic cell;
2) Building a scaffold;
3) Removing the old rubber plate in the electrolytic cell;
4) Cutting the electrode plate clamping groove at the bottom of the electrolytic cell, and then welding a new clamping groove lined with glue;
5) Repairing a matrix seriously corroded in the electrolytic cell;
6) Carrying out sand blasting and bottom material spraying on the electrolytic cell;
7) Brushing an adhesive in the electrolytic cell, and then carrying out rubber lining construction; a
8) And (5) detecting the electrolytic cell, and finishing repairing after the electrolytic cell is detected to be qualified.
2. A repairing method of a degreasing electrolytic cell as claimed in claim 1, wherein the step 1) of dismantling the mechanical part of the electrolytic cell comprises dismantling a sink roller, an electrode plate, an upper clamping groove, a manhole and flanges in the electrolytic cell, and simultaneously plugging all pipe orifice flanges connected with the cell body by canvas.
3. The repairing method of the degreasing electrolytic cell as set forth in claim 1, wherein the step of removing the old rubber sheet in the electrolytic cell in the step 3) comprises: stripping the original old rubber plate of the electrolytic cell, and then polishing the old anticorrosion bonding layer.
4. The method for repairing a degreasing electrolytic cell as recited in claim 1, wherein the step 5) of repairing a severely corroded substrate in the electrolytic cell comprises: and (4) performing repair welding on the corroded part of the matrix, and after the repair welding is finished, performing overall polishing on the surface of the electrolytic cell.
5. The method for repairing a degreasing electrolytic cell as recited in claim 4, wherein the repair welding in the step 5) is oxygen cutting repair welding.
6. The method for repairing a degreasing electrolytic cell as recited in claim 1, wherein the surface of the steel after the sand blasting in the step 6) is painted or sprayed with a primer.
7. The method as claimed in claim 1, wherein the surface roughness of the substrate after the sand blasting in step 6) is required to be greater than 50 μm.
8. The repairing method of the degreasing electrolytic cell as recited in claim 1, wherein the rubber sheet in the electrolytic cell is cleaned by a cleaning agent before the adhesive is applied in the step 7).
9. The method for repairing a degreasing electrolytic cell as set forth in claim 1, wherein the detecting step in the step 8) comprises: visual inspection, hardness inspection, anti-stripping strength inspection and electric spark inspection.
10. The method of repairing a degreasing electrolytic cell as set forth in claim 1, wherein when a crack is detected in the step 8), the crack is repaired using a rubber block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211108006.1A CN115558978A (en) | 2022-09-13 | 2022-09-13 | Repairing method of degreasing electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211108006.1A CN115558978A (en) | 2022-09-13 | 2022-09-13 | Repairing method of degreasing electrolytic tank |
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| Publication Number | Publication Date |
|---|---|
| CN115558978A true CN115558978A (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211108006.1A Pending CN115558978A (en) | 2022-09-13 | 2022-09-13 | Repairing method of degreasing electrolytic tank |
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| CN (1) | CN115558978A (en) |
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- 2022-09-13 CN CN202211108006.1A patent/CN115558978A/en active Pending
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