CN117701835A - High-temperature annealing cooling process and device for oriented silicon steel - Google Patents
High-temperature annealing cooling process and device for oriented silicon steel Download PDFInfo
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- CN117701835A CN117701835A CN202410168215.8A CN202410168215A CN117701835A CN 117701835 A CN117701835 A CN 117701835A CN 202410168215 A CN202410168215 A CN 202410168215A CN 117701835 A CN117701835 A CN 117701835A
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- 238000001816 cooling Methods 0.000 title claims abstract description 239
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 55
- 238000000137 annealing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 230000005855 radiation Effects 0.000 claims description 33
- 238000004321 preservation Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of oriented silicon steel manufacturing, in particular to a high-temperature annealing cooling process and a high-temperature annealing cooling device for oriented silicon steel, which are used for realizing staged cooling of oriented silicon steel coils by means of a cooling radiant tube and cold air introduced into a furnace in a cooling section of a tunnel type high-temperature annealing furnace, improving the coil discharging plate shape of an outer coil of the coil of steel and reducing buckling defects under the condition of ensuring the cooling requirement of the coil of steel, accelerating the coil of steel to be discharged, improving the production efficiency and reducing the production cost; the oriented silicon steel prepared by the invention has flat plate shape, the ship-shaped height of the outer ring is lower than 8mm, and the buckling number of the outer ring is lower than 30m.
Description
Technical Field
The invention relates to the technical field of oriented silicon steel manufacturing, in particular to a high-temperature annealing cooling process and a device for oriented silicon steel.
Background
The high-temperature annealing process of the oriented silicon steel is generally divided into a primary heating section, a low heat preservation section, a secondary heating section, a high heat preservation section and a cooling section, wherein decarburized magnesium oxide materials are generally used as raw material plates, and the steel coil tapping temperature is controlled within 400 ℃ in the cooling section in a mode of naturally cooling along with a furnace. However, the cooling temperature is not controlled by means of natural cooling along with the furnace in the oriented silicon steel cooling process, the cooling rate is low, the required cooling time is long, the steel coil in-furnace time is increased, and the production efficiency of the continuous cover is influenced; if the steel coil is discharged at a higher temperature or the cooling rate of the cooling section is higher, the quality of the steel coil discharged from the furnace is poor, and the production line has longer buckling defects.
Disclosure of Invention
In order to solve the problems in the prior art, the main purpose of the invention is to provide a high-temperature annealing cooling process and a device for oriented silicon steel.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
the high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃.
As a preferable scheme of the high-temperature annealing and cooling process of the oriented silicon steel, the invention comprises the following steps: in the step S1, the cooling speed is 8-10 ℃/h.
As a preferable scheme of the high-temperature annealing and cooling process of the oriented silicon steel, the invention comprises the following steps: in the step S2, the cooling speed of the steel coil is controlled by the cooling radiation pipe through adjusting the frequency of the cooling fan.
As a preferable scheme of the high-temperature annealing and cooling process of the oriented silicon steel, the invention comprises the following steps: in the step S2, the cooling speed is 13-15 ℃/h.
As a preferable scheme of the high-temperature annealing and cooling process of the oriented silicon steel, the invention comprises the following steps: in the step S3, the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch pipe, and then the control of the cooling speed of the steel coil is realized.
As a preferable scheme of the high-temperature annealing and cooling process of the oriented silicon steel, the invention comprises the following steps: in the step S3, the cooling speed is 18-20 ℃/h.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
a high temperature annealing cooling device for oriented silicon steel, comprising:
the furnace-following cooling section is used for cooling the steel coil from the end temperature of the high heat preservation section to 1100 ℃;
the radiation pipe cooling section adopts a cooling radiation pipe to realize cooling of the steel coil from 1100 ℃ to 800 ℃;
and a cold air cooling section for cooling the steel coil from 800 ℃ to 400 ℃ by adopting a cooling radiation pipe to discharge cold air into the furnace.
As a preferable scheme of the high-temperature annealing and cooling device for oriented silicon steel, the invention comprises the following steps: cooling radiant tubes are arranged in the radiant tube cooling section and the cold air cooling section respectively.
As a preferable scheme of the high-temperature annealing and cooling device for oriented silicon steel, the invention comprises the following steps: the cooling radiant tube of the cold air cooling section is provided with a small hole for leading cold air of the cooling radiant tube into the furnace.
As a preferable scheme of the high-temperature annealing and cooling device for oriented silicon steel, the invention comprises the following steps: the radiant tube cooling section and the cold air cooling section are provided with a plurality of cooling radiant tube subgroups, and each subgroup is provided with an independent cooling fan.
The beneficial effects of the invention are as follows:
the invention provides a high-temperature annealing cooling process and a high-temperature annealing cooling device for oriented silicon steel, which are used for realizing staged cooling of oriented silicon steel coils by means of a cooling radiant tube and cold air introduced into a furnace in a cooling section of a tunnel type high-temperature annealing furnace, improving the plate shape of the outer ring of the coils and reducing buckling defects under the condition of ensuring the cooling requirement of the coils, accelerating the discharge of the coils, improving the production efficiency and reducing the production cost; the oriented silicon steel prepared by the invention has flat plate shape, the ship-shaped height of the outer ring is lower than 8mm, and the buckling number of the outer ring is lower than 30m.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to one aspect of the invention, the invention provides the following technical scheme:
the high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃.
Preferably, in the step S1, the cooling speed is 8 to 10 ℃/h. Specifically, the cooling of the section can be realized by adopting furnace cooling, and the cooling speed can be any one or any range between any two of 8 ℃/h, 8.5 ℃/h, 9 ℃/h, 9.5 ℃/h and 10 ℃/h;
preferably, in the step S2, the cooling speed of the section cannot be ensured after furnace cooling, and the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, wherein the cooling speed is 13-15 ℃/h. Specifically, the cooling rate may be, for example, any one or a range between any two of 13 ℃/h, 13.5 ℃/h, 14 ℃/h, 14.5 ℃/h, 15 ℃/h;
preferably, in the step S3, the cooling speed of the section cannot be ensured during furnace cooling, and the control of the cooling air quantity of the cooling radiant tube is realized by adjusting the opening of the air inlet branch pipe valve, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 18-20 ℃/h. Specifically, the cooling rate may be, for example, in a range between any one or any two of 18 ℃/h, 18.5 ℃/h, 19 ℃/h, 19.5 ℃/h, 20 ℃/h.
According to another aspect of the invention, the invention provides the following technical scheme:
a high temperature annealing cooling device for oriented silicon steel, comprising:
the furnace-following cooling section is used for cooling the steel coil from the end temperature of the high heat preservation section to 1100 ℃;
the radiation pipe cooling section adopts a cooling radiation pipe to realize cooling of the steel coil from 1100 ℃ to 800 ℃;
and a cold air cooling section for cooling the steel coil from 800 ℃ to 400 ℃ by adopting a cooling radiation pipe to discharge cold air into the furnace.
Preferably, cooling radiant tubes are arranged in the radiant tube cooling section and the cold air cooling section.
Preferably, the cooling radiant tube of the cold air cooling section is provided with small holes for introducing cold air of the cooling radiant tube into the furnace.
Preferably, the radiant tube cooling section and the cold air cooling section are provided with a plurality of cooling radiant tube subgroups, each subgroup having an independent cooling fan.
The technical scheme of the invention is further described below by combining specific embodiments.
The following examples all employ the high temperature annealing and cooling device for oriented silicon steel described in the above examples.
Example 1
The high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃; the cooling speed is 10 ℃/h;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 15 ℃/h;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 20 ℃/h.
The oriented silicon steel plate prepared by the embodiment is flat, the ship-shaped height of the outer ring is lower than 5mm, and the buckling number of the outer ring is lower than 10m.
Example 2
The high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃; the cooling speed is 8 ℃/h;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 15 ℃/h;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 19 ℃/h.
The oriented silicon steel plate prepared by the embodiment is flat, the ship-shaped height of the outer ring is lower than 6mm, and the buckling number of the outer ring is lower than 20m.
Example 3
The high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃; the cooling speed is 10 ℃/h;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 13 ℃/h;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 20 ℃/h.
The oriented silicon steel plate prepared by the embodiment is flat, the ship-shaped height of the outer ring is lower than 6mm, and the buckling number of the outer ring is lower than 20m.
Example 4
The high temperature annealing cooling process of oriented silicon steel includes the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃; the cooling speed is 10 ℃/h;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 15 ℃/h;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 18 ℃/h.
The oriented silicon steel plate prepared by the embodiment is flat, the ship-shaped height of the outer ring is lower than 7mm, and the buckling number of the outer ring is lower than 30m.
Comparative example 1
The difference from example 1 is that the cooling section of the tunnel type high temperature annealing furnace is used for cooling the oriented silicon steel coil along with the furnace.
The ship shape of the oriented silicon steel prepared in the comparative example is serious, the height is more than 50mm, and the buckling number of the outer ring is more than 1000m.
Comparative example 2
The difference from example 1 is that S2, cooling the steel coil from 1100 ℃ to 800 ℃ is realized by adopting a cooling radiant tube; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 11 ℃/h.
The oriented silicon steel prepared in the comparative example has poor shape, the ship-shaped height of the outer ring is 10-15 mm, and the buckling number of the outer ring is 130-200 m.
Comparative example 3
The difference from example 1 is that S2, cooling the steel coil from 1100 ℃ to 800 ℃ is realized by adopting a cooling radiant tube; the cooling speed of the cooling radiation pipe on the steel coil is controlled by adjusting the frequency of the cooling fan, and the cooling speed is 16 ℃/h.
The oriented silicon steel prepared in the comparative example has poor shape, the ship-shaped height of the outer ring is 10-15 mm, and the buckling number of the outer ring is 130-200 m.
Comparative example 4
The difference with the embodiment 1 is that S3, a cooling radiation pipe is adopted to discharge cold air into the furnace to realize cooling of the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 16 ℃/h.
The oriented silicon steel prepared in the comparative example has poor shape, the ship-shaped height of the outer ring is 15-25 mm, and the buckling number of the outer ring is 200-500 m.
Comparative example 5
The difference with the embodiment 1 is that S3, a cooling radiation pipe is adopted to discharge cold air into the furnace to realize cooling of the steel coil from 800 ℃ to 400 ℃; the control of the cold air output of the cooling radiant tube is realized by adjusting the opening of the valve of the air inlet branch tube, so that the control of the cooling speed of the steel coil is realized, and the cooling speed is 25 ℃/h.
The oriented silicon steel prepared in the comparative example has poor shape, the ship-shaped height of the outer ring is 25-35 mm, and the buckling number of the outer ring is 500-1000 m.
According to the embodiment and the comparative example, the invention realizes the staged cooling of the oriented silicon steel coil by means of the cooling radiant tube and the cold air introduced into the furnace in the cooling section of the tunnel high-temperature annealing furnace, improves the coil outer ring tapping plate shape and reduces buckling defects under the condition of ensuring the cooling requirement of the coil, accelerates the coil tapping, improves the production efficiency and reduces the production cost; the oriented silicon steel prepared by the invention has flat plate shape, the ship-shaped height of the outer ring is lower than 8mm, and the buckling number of the outer ring is lower than 30m.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The high-temperature annealing and cooling process of the oriented silicon steel is characterized in that the oriented silicon steel coil is cooled in stages in a cooling section of a tunnel high-temperature annealing furnace, and the process comprises the following steps:
s1, cooling along with furnace cooling is adopted to cool the steel coil from the end temperature of a high heat preservation section to 1100 ℃;
s2, cooling the steel coil from 1100 ℃ to 800 ℃ by adopting a cooling radiation pipe;
s3, adopting a cooling radiation pipe to discharge cold air into the furnace to cool the steel coil from 800 ℃ to 400 ℃.
2. The high temperature annealing and cooling process of oriented silicon steel according to claim 1, wherein in the step S1, the cooling speed is 8-10 ℃/h.
3. The high temperature annealing and cooling process of oriented silicon steel according to claim 1, wherein in the step S2, the cooling speed of the cooling radiant tube to the steel coil is controlled by adjusting the frequency of the cooling fan.
4. The high temperature annealing and cooling process of oriented silicon steel according to claim 1, wherein in the step S2, the cooling speed is 13-15 ℃/h.
5. The high temperature annealing cooling process of oriented silicon steel according to claim 1, wherein in the step S3, the control of the cooling air quantity of the cooling radiant tube is achieved by adjusting the opening of the air inlet branch pipe valve, and the control of the cooling speed of the steel coil is further achieved.
6. The high temperature annealing and cooling process of oriented silicon steel according to claim 1, wherein in the step S3, the cooling speed is 18-20 ℃/h.
7. A high temperature annealing and cooling device for oriented silicon steel, which is characterized by being used for realizing the high temperature annealing and cooling process of oriented silicon steel according to any one of claims 1-6, comprising:
the furnace-following cooling section is used for cooling the steel coil from the end temperature of the high heat preservation section to 1100 ℃;
the radiation pipe cooling section adopts a cooling radiation pipe to realize cooling of the steel coil from 1100 ℃ to 800 ℃;
and a cold air cooling section for cooling the steel coil from 800 ℃ to 400 ℃ by adopting a cooling radiation pipe to discharge cold air into the furnace.
8. The high temperature annealing and cooling device for oriented silicon steel as set forth in claim 7 wherein cooling radiant tubes are disposed in both the radiant tube cooling section and the cold air cooling section.
9. The high temperature annealing and cooling device for oriented silicon steel as set forth in claim 8 wherein the cooling radiant tube of the cold air cooling section is provided with small holes for introducing cold air of the cooling radiant tube into the furnace.
10. The high temperature annealing and cooling device for oriented silicon steel as set forth in claim 7 wherein the radiant tube cooling section and the cold air cooling section are each provided with a plurality of cooling radiant tube subgroups, each subgroup having an independent cooling fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410168215.8A CN117701835A (en) | 2024-02-06 | 2024-02-06 | High-temperature annealing cooling process and device for oriented silicon steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410168215.8A CN117701835A (en) | 2024-02-06 | 2024-02-06 | High-temperature annealing cooling process and device for oriented silicon steel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09194941A (en) * | 1996-01-10 | 1997-07-29 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet high in magnetic flux density |
| CN112143974A (en) * | 2020-09-27 | 2020-12-29 | 江苏省沙钢钢铁研究院有限公司 | Production method of non-oriented silicon steel and non-oriented silicon steel |
| CN112609130A (en) * | 2020-12-16 | 2021-04-06 | 江苏省沙钢钢铁研究院有限公司 | High-grade non-oriented silicon steel and production method thereof |
| CN112853052A (en) * | 2019-11-28 | 2021-05-28 | 宝山钢铁股份有限公司 | Control method for high-temperature annealing of oriented silicon steel |
| CN113403463A (en) * | 2021-05-25 | 2021-09-17 | 鞍钢股份有限公司 | Production method for improving cold rolling processability of oriented silicon steel |
| CN117488022A (en) * | 2023-10-25 | 2024-02-02 | 包头钢铁（集团）有限责任公司 | Control method for annealing process of high-grade non-oriented silicon steel |
-
2024
- 2024-02-06 CN CN202410168215.8A patent/CN117701835A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09194941A (en) * | 1996-01-10 | 1997-07-29 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet high in magnetic flux density |
| CN112853052A (en) * | 2019-11-28 | 2021-05-28 | 宝山钢铁股份有限公司 | Control method for high-temperature annealing of oriented silicon steel |
| CN112143974A (en) * | 2020-09-27 | 2020-12-29 | 江苏省沙钢钢铁研究院有限公司 | Production method of non-oriented silicon steel and non-oriented silicon steel |
| CN112609130A (en) * | 2020-12-16 | 2021-04-06 | 江苏省沙钢钢铁研究院有限公司 | High-grade non-oriented silicon steel and production method thereof |
| CN113403463A (en) * | 2021-05-25 | 2021-09-17 | 鞍钢股份有限公司 | Production method for improving cold rolling processability of oriented silicon steel |
| CN117488022A (en) * | 2023-10-25 | 2024-02-02 | 包头钢铁（集团）有限责任公司 | Control method for annealing process of high-grade non-oriented silicon steel |
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