CN106435102B - Tunnel type oriented silicon steel continuous high-temperature annealing process - Google Patents
Tunnel type oriented silicon steel continuous high-temperature annealing process Download PDFInfo
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- CN106435102B CN106435102B CN201610678352.1A CN201610678352A CN106435102B CN 106435102 B CN106435102 B CN 106435102B CN 201610678352 A CN201610678352 A CN 201610678352A CN 106435102 B CN106435102 B CN 106435102B
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- trolley
- temperature
- furnace
- diffusing
- annealing
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- 238000000137 annealing Methods 0.000 title claims abstract description 74
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 8
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
Abstract
The invention discloses a tunnel-type oriented silicon steel continuous high-temperature annealing process, which realizes continuous annealing production of oriented silicon steel, solves the production period and reduces the energy consumption; the technical scheme is as follows: a continuous high-temperature annealing process for tunnel-type oriented silicon steel is carried out according to the following steps: loading and filling the furnace, moving the trolley loaded with the steel coil to the inlet of the annealing furnace through an auxiliary rail, and pushing the trolley into the annealing furnace through a hydraulic push rod to perform annealing treatment; then cooling again, discharging, introducing protective gas into the sealing cover of the oriented silicon steel in the whole annealing furnace, then unloading, overhauling the trolley, and repeating the steps to realize continuous annealing treatment; the invention can be widely applied to the field of oriented silicon steel continuous annealing furnaces.
Description
Technical Field
The invention relates to a tunnel type oriented silicon steel continuous high-temperature annealing process, belonging to the technical field of oriented silicon steel continuous annealing furnaces.
Background
The annealing of the whole coil of silicon steel is usually completed in one furnace in the existing oriented silicon steel annealing, the heat loss is large, the annealing furnace is in an idle state in the process of material changing, the production time is wasted, and how to realize the continuous production of the curved oriented silicon steel is a problem which needs to be solved urgently.
Disclosure of Invention
The invention overcomes the defects in the prior art, provides the tunnel-type oriented silicon steel continuous high-temperature annealing process, realizes the continuous annealing production of the oriented silicon steel, solves the production period and reduces the energy consumption.
In order to solve the technical problems, the invention adopts the technical scheme that: a continuous high-temperature annealing process for tunnel-type oriented silicon steel is carried out according to the following steps:
the first step is as follows: charging; placing the prefabricated steel coil on a trolley, and fastening the steel coil by using a sealing cover to ensure that the steel coil is in a sealed environment;
the second step is that: filling the furnace; moving the trolley loaded with the steel coil to the inlet of the annealing furnace through the auxiliary rail, and pushing the trolley into the annealing furnace through a hydraulic push rod;
the third step: annealing treatment; comprises a low temperature area, a heating area and a high temperature area;
the temperature of the low-temperature area is 550-600 ℃, the temperature is kept for 20-30 h, and nitrogen and ammonia decomposition gas are sequentially introduced into the low-temperature area sealing cover;
the temperature in the heating area is increased from 550 ℃ to 1200 ℃ within 30-40 h, and ammonia decomposition gas is introduced into the heating area sealing cover;
the temperature of the high-temperature area is 1100-1200 ℃, the temperature is kept for 15-25 h, and hydrogen is introduced into the high-temperature area sealing cover;
the fourth step: cooling; comprises a natural cooling stage and a rapid cooling stage;
the natural cooling stage is finished at the tail end of a high-temperature area of the annealing furnace, the gas of the annealing furnace is closed for natural cooling, the temperature is reduced to 800-1000 ℃, and nitrogen is introduced into the sealing cover in the natural cooling stage;
the rapid cooling stage is completed in a cooling area of the annealing furnace, the cooling area and a high-temperature area are directly separated by a partition plate, a plurality of fans are arranged at the upper part of the annealing furnace in the rapid cooling stage, the cooling is carried out by ventilation of the fans, the temperature is reduced to 30-80 ℃ in the rapid cooling stage, and nitrogen is introduced into a sealing cover in the rapid cooling stage;
the fifth step: discharging; pushing the cooled trolley out of the annealing furnace;
and a sixth step: unloading; after the trolley is pulled to the unloading area of the auxiliary rail, the annealed steel coil is hung away;
the seventh step: overhauling; after the trolley is pulled to the maintenance area of the auxiliary rail, whether the trolley is complete is maintained; if the furnace is complete, directly charging to prepare for next furnace charging, and if the furnace is incomplete, repairing, charging after repairing is completed, and preparing for next furnace charging;
eighth step: and repeating the first step to the seventh step to realize continuous annealing treatment.
The trolleys are sequentially and continuously discharged in the annealing furnace and are pushed to move in the annealing furnace through a hydraulic rod at the inlet of the annealing furnace.
And an atmosphere pipeline system and a trolley tail gas diffusing system are arranged at the bottom of the annealing furnace and are used for introducing protective gas into the sealing cover and diffusing the protective gas.
And an air curtain is arranged at the inlet of the annealing furnace and used for preventing heat loss in the annealing furnace.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the annealing processing of the oriented silicon steel is put into the tunnel type annealing furnace for production, different temperature areas are arranged in the annealing furnace, and the trolley on which the annealed steel coil is placed is moved, so that the steel coil is annealed sequentially through the different temperature areas, and the continuous annealing production of the oriented silicon steel is realized.
Detailed Description
The invention relates to a continuous high-temperature annealing process of tunnel-type oriented silicon steel, which is implemented according to the following steps:
the first step is as follows: charging; placing the prefabricated steel coil on a trolley, and fastening the steel coil by using a sealing cover to ensure that the steel coil is in a sealed environment;
the second step is that: filling the furnace; moving the trolley loaded with the steel coil to the inlet of the annealing furnace through the auxiliary rail, and pushing the trolley into the annealing furnace through a hydraulic push rod;
the third step: annealing treatment; comprises a low temperature area, a heating area and a high temperature area;
the temperature of the low-temperature area is 550-600 ℃, the temperature is kept for 20-30 h, and nitrogen and ammonia decomposition gas are sequentially introduced into the low-temperature area sealing cover;
the temperature in the heating area is increased from 550 ℃ to 1200 ℃ within 30-40 h, and ammonia decomposition gas is introduced into the heating area sealing cover;
the temperature of the high-temperature area is 1100-1200 ℃, the temperature is kept for 15-25 h, and hydrogen is introduced into the high-temperature area sealing cover;
the fourth step: cooling; comprises a natural cooling stage and a rapid cooling stage;
the natural cooling stage is finished at the tail end of a high-temperature area of the annealing furnace, the gas of the annealing furnace is closed for natural cooling, the temperature is reduced to 800-1000 ℃, and nitrogen is introduced into the sealing cover in the natural cooling stage;
the rapid cooling stage is completed in a cooling area of the annealing furnace, the cooling area and a high-temperature area are directly separated by a partition plate, a plurality of fans are arranged at the upper part of the annealing furnace in the rapid cooling stage, the cooling is carried out by ventilation of the fans, the temperature is reduced to 30-80 ℃ in the rapid cooling stage, and nitrogen is introduced into a sealing cover in the rapid cooling stage;
the fifth step: discharging; pushing the cooled trolley out of the annealing furnace;
and a sixth step: unloading; after the trolley is pulled to the unloading area of the auxiliary rail, the annealed steel coil is hung away;
the seventh step: overhauling; after the trolley is pulled to the maintenance area of the auxiliary rail, whether the trolley is complete is maintained; if the furnace is complete, directly charging to prepare for next furnace charging, and if the furnace is incomplete, repairing, charging after repairing is completed, and preparing for next furnace charging;
eighth step: and repeating the first step to the seventh step to realize continuous annealing treatment.
The trolleys are sequentially and continuously discharged in the annealing furnace and are pushed to move in the annealing furnace through a hydraulic rod at the inlet of the annealing furnace.
And an atmosphere pipeline system and a trolley tail gas diffusing system are arranged at the bottom of the annealing furnace and are used for introducing protective gas into the sealing cover and diffusing the protective gas.
And an air curtain is arranged at the inlet of the annealing furnace and used for preventing heat loss in the annealing furnace.
Atmosphere pipe-line system of annealing furnace bottom, including atmosphere hard tube, atmosphere metal collapsible tube, C type slide rail and C type suspension wire coaster of admitting air, the fixed bottom that sets up at the furnace body of C type slide rail, C type suspension wire coaster activity matching sets up in C type slide rail, and can follow C type slide rail and remove, atmosphere metal collapsible tube fixes on C type suspension wire coaster, just atmosphere metal collapsible tube's one end and air supply intercommunication, the other end are connected with the atmosphere hard tube of admitting air, the atmosphere hard tube's that admits air one end and atmosphere metal collapsible tube intercommunication, the other end is connected with the atmosphere intake pipe on dolly through quick-operation joint.
The atmosphere metal hose is fixed on the C-shaped suspension wire pulley through a stainless steel cable tie.
The bottom of furnace body is provided with the bracket, the bracket is located atmosphere metal collapsible tube below for hold atmosphere metal collapsible tube.
The trolley tail gas diffusing system comprises a diffusing gas collecting pipe, a diffusing coiled pipe, a diffusing telescopic pipeline and a diffusing port, wherein the diffusing gas collecting pipe is arranged in a trolley in an annular array mode, the diffusing gas collecting pipe vertically runs through the trolley, an upper end gas inlet of the diffusing gas collecting pipe is used for collecting gas in an upper cover type furnace of the trolley, a lower end gas outlet of the diffusing gas collecting pipe is connected to the diffusing coiled pipe, a gas outlet of the diffusing coiled pipe is communicated with the diffusing telescopic pipeline, a gas outlet of the diffusing telescopic pipeline is the diffusing port, and a valve is arranged on the diffusing telescopic pipeline.
The diffusion telescopic pipeline is fixedly arranged on the diffusion pipe bracket, the diffusion pipe bracket is positioned below the trolley, and is fixedly arranged at the bottom of the trolley.
The diffusing coiled pipe and the diffusing telescopic pipeline are communicated through a metal hose, and the metal hose is connected with the joint of the diffusing coiled pipe and the diffusing telescopic pipeline through a flange.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.
Claims (3)
1. The continuous high-temperature annealing process for the tunnel-type oriented silicon steel is characterized by comprising the following steps of:
the first step is as follows: charging; placing the prefabricated steel coil on a trolley, and fastening the steel coil by using a sealing cover to ensure that the steel coil is in a sealed environment;
the second step is that: filling the furnace; moving the trolley loaded with the steel coil to the inlet of the annealing furnace through the auxiliary rail, and pushing the trolley into the annealing furnace through a hydraulic push rod;
the third step: annealing treatment; comprises a low temperature area, a heating area and a high temperature area;
the temperature of the low-temperature area is 550-600 ℃, the temperature is kept for 20-30 h, and nitrogen and ammonia decomposition gas are sequentially introduced into the low-temperature area sealing cover;
the temperature in the heating area is increased from 550 ℃ to 1200 ℃ within 30-40 h, and ammonia decomposition gas is introduced into the heating area sealing cover;
the temperature of the high-temperature area is 1100-1200 ℃, the temperature is kept for 15-25 h, and hydrogen is introduced into the high-temperature area sealing cover;
the fourth step: cooling; comprises a natural cooling stage and a rapid cooling stage;
the natural cooling stage is finished at the tail end of a high-temperature area of the annealing furnace, the gas of the annealing furnace is closed for natural cooling, the temperature is reduced to 800-1000 ℃, and nitrogen is introduced into the sealing cover in the natural cooling stage;
the rapid cooling stage is completed in a cooling area of the annealing furnace, the cooling area and a high-temperature area are directly separated by a partition plate, a plurality of fans are arranged at the upper part of the annealing furnace in the rapid cooling stage, the cooling is carried out by ventilation of the fans, the temperature is reduced to 30-80 ℃ in the rapid cooling stage, and nitrogen is introduced into a sealing cover in the rapid cooling stage;
the fifth step: discharging; pushing the cooled trolley out of the annealing furnace;
and a sixth step: unloading; after the trolley is pulled to the unloading area of the auxiliary rail, the annealed steel coil is hung away;
the seventh step: overhauling; after the trolley is pulled to the maintenance area of the auxiliary rail, whether the trolley is complete is maintained; if the furnace is complete, directly charging to prepare for next furnace charging, and if the furnace is incomplete, repairing, charging after repairing is completed, and preparing for next furnace charging;
eighth step: repeating the first step to the seventh step to realize continuous annealing treatment;
an atmosphere pipeline system and a trolley tail gas diffusion system are arranged at the bottom of the annealing furnace and are used for introducing protective gas into the sealing cover and performing diffusion treatment on the protective gas;
the atmosphere pipeline system at the bottom of the annealing furnace comprises an atmosphere air inlet hard pipe, an atmosphere metal hose, a C-shaped slide rail and a C-shaped suspension wire pulley, wherein the C-shaped slide rail is fixedly arranged at the bottom of the furnace body, the C-shaped suspension wire pulley is movably matched and arranged in the C-shaped slide rail and can move along the C-shaped slide rail, the atmosphere metal hose is fixed on the C-shaped suspension wire pulley, one end of the atmosphere metal hose is communicated with an air source, the other end of the atmosphere metal hose is connected with the atmosphere air inlet hard pipe, one end of the atmosphere air inlet hard pipe is communicated with the atmosphere metal hose, and the other end of the atmosphere air inlet hard pipe is connected with an atmosphere air; the atmosphere metal hose is fixed on the C-shaped suspension wire pulley through a stainless steel binding belt; the bottom of the furnace body is provided with a bracket, and the bracket is positioned below the atmosphere metal hose and used for supporting the atmosphere metal hose; the trolley tail gas diffusing system comprises diffusing gas collecting pipes, diffusing coiled pipes, diffusing telescopic pipelines and diffusing ports, wherein a plurality of diffusing gas collecting pipes are arranged in a trolley in an annular array mode and vertically penetrate through the trolley; the diffusing telescopic pipeline is fixedly arranged on a diffusing pipe bracket, and the diffusing pipe bracket is positioned below the trolley and is fixedly arranged at the bottom of the trolley; the diffusing coiled pipe and the diffusing telescopic pipeline are communicated through a metal hose, and the metal hose is connected with the joint of the diffusing coiled pipe and the diffusing telescopic pipeline through a flange.
2. The continuous high-temperature annealing process for tunnel-type oriented silicon steel as claimed in claim 1, wherein the trolleys are sequentially and continuously discharged in the annealing furnace and are pushed to move in the annealing furnace by a hydraulic rod at the inlet of the annealing furnace.
3. The continuous high-temperature annealing process for tunnel-type oriented silicon steel as claimed in claim 1, wherein an air curtain is provided at the inlet of the annealing furnace, and the air curtain is used for preventing heat loss in the annealing furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610678352.1A CN106435102B (en) | 2016-08-17 | 2016-08-17 | Tunnel type oriented silicon steel continuous high-temperature annealing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610678352.1A CN106435102B (en) | 2016-08-17 | 2016-08-17 | Tunnel type oriented silicon steel continuous high-temperature annealing process |
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| Publication Number | Publication Date |
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| CN106435102A CN106435102A (en) | 2017-02-22 |
| CN106435102B true CN106435102B (en) | 2020-10-16 |
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| CN109022701A (en) * | 2018-09-21 | 2018-12-18 | 蚌埠市双环电子集团股份有限公司 | A kind of soft magnetic materials annealing heat-treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156362A (en) * | 1991-12-06 | 1993-06-22 | Nippon Steel Corp | Manufacture of high magnetix flux density grain-oriented silicon steel sheet free from forsterite film |
| CN104018068A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Method for preparing high-magnetic-induction oriented silicon steel with thickness of 0.18mm |
| CN104342542A (en) * | 2014-11-04 | 2015-02-11 | 武汉钢铁(集团)公司 | Production method of Bi-containing high magnetic induction oriented silicon steel with excellent bottom layer |
| CN105112617A (en) * | 2015-09-25 | 2015-12-02 | 包头市威丰电磁材料有限责任公司 | Novel high-temperature annealing process of cold-rolled oriented silicone steel |
-
2016
- 2016-08-17 CN CN201610678352.1A patent/CN106435102B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156362A (en) * | 1991-12-06 | 1993-06-22 | Nippon Steel Corp | Manufacture of high magnetix flux density grain-oriented silicon steel sheet free from forsterite film |
| CN104018068A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Method for preparing high-magnetic-induction oriented silicon steel with thickness of 0.18mm |
| CN104342542A (en) * | 2014-11-04 | 2015-02-11 | 武汉钢铁(集团)公司 | Production method of Bi-containing high magnetic induction oriented silicon steel with excellent bottom layer |
| CN105112617A (en) * | 2015-09-25 | 2015-12-02 | 包头市威丰电磁材料有限责任公司 | Novel high-temperature annealing process of cold-rolled oriented silicone steel |
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Effective date of registration: 20220211 Address after: 014000 No. 2, Jinyi Road, hope Park, Machi Town, Jiuyuan District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Baotou Weifeng New Materials Co.,Ltd. Address before: 014060 No. 23, Dongfang hope Avenue, Binhe New Area electromechanical Park, rare earth high tech Zone, Baotou City, Inner Mongolia Autonomous Region Patentee before: BAOTOU WEIFENG RARE EARTH ELECTROMAGNETIC MATERIAL CO.,LTD. |
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Denomination of invention: A continuous high temperature annealing process for tunnel oriented silicon steel Effective date of registration: 20220926 Granted publication date: 20201016 Pledgee: Bank of China Limited Baotou Kundulun sub branch Pledgor: Baotou Weifeng New Materials Co.,Ltd. Registration number: Y2022150000101 |
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Date of cancellation: 20231115 Granted publication date: 20201016 Pledgee: Bank of China Limited Baotou Kundulun sub branch Pledgor: Baotou Weifeng New Materials Co.,Ltd. Registration number: Y2022150000101 |
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Denomination of invention: A Tunneling Oriented Silicon Steel Continuous High Temperature Annealing Process Effective date of registration: 20231219 Granted publication date: 20201016 Pledgee: Bank of Inner Mongolia Co.,Ltd. Baotou high tech Zone sub branch Pledgor: Baotou Weifeng New Materials Co.,Ltd. Registration number: Y2023980072818 |