CN106854697A - A kind of method of the quick blowing out of vertical continuous annealing furnace - Google Patents
A kind of method of the quick blowing out of vertical continuous annealing furnace Download PDFInfo
- Publication number
- CN106854697A CN106854697A CN201510901650.8A CN201510901650A CN106854697A CN 106854697 A CN106854697 A CN 106854697A CN 201510901650 A CN201510901650 A CN 201510901650A CN 106854697 A CN106854697 A CN 106854697A
- Authority
- CN
- China
- Prior art keywords
- continuous annealing
- furnace
- annealing furnace
- vertical continuous
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The present invention relates to a kind of method of the quick blowing out of vertical continuous annealing furnace, furnace temperature process is replaced and reduced to furnace atmosphere when mainly solving vertical continuous annealing furnace blowing out in the prior art slowly, furnace outage time technical problem more long.A kind of method of the quick blowing out of vertical continuous annealing furnace, including：1）Close hydrogen flowing quantity valve, 2）Transition Materials are passed through in stove, the speed of service of the Transition Materials in stove is controlled between 280-350mpm；3）Substep reduces furnace temperature：First stage, when the weld seam of regular burden(ing) and Transition Materials reaches final cooling section, vertical continuous annealing furnace temperature is set to 500 DEG C, second stage, and when the furnace temperature of continuous annealing furnace is down to 500 DEG C, strip is out of service in vertical continuous annealing furnace stove；Furnace temperature is set to 300-400 DEG C again；4）The step of substep opens bell.The inventive method technology controlling and process is simple, effectively reduces the time of vertical continuous annealing furnace blowing out, realizes the quick blowing out of vertical continuous annealing furnace.
Description
Technical field
The present invention relates to continuous annealing furnace technical field, the method for more particularly to a kind of quick blowing out of vertical continuous annealing furnace.
Background technology
Continuous annealing furnace is used to for the cold rolling rear strip for producing processing hardening to carry out recrystallization annealing, improves microstructure, improves plasticity and punching formation property, and ensure that surface is not oxidized.After the several independent operation of bell-type annealing is merged into a unit by continuous annealing, the production cycle shortened at most one hour by original 10 days or so, and production is got the raw materials ready and subtract greatly, and production process simplifies, and convenient management, productivity ratio is greatly improved.
Vertical continuous annealing furnace is mainly used in the annealing production of uncoated tinplate base, and strip in stove will not be aoxidized by constitute mixed gas protected of nitrogen and hydrogen.Therefore, before vertical continuous annealing furnace maintenance down, it is necessary to carry out purging displacement to furnace atmosphere, while reducing the furnace temperature of vertical continuous annealing furnace, after after furnace temperature reduction to a certain extent, bell can be opened, carries out service work.
At present, the conventional method of blowing out is that after regular burden(ing) production terminates in stove, continuous annealing furnace starts cooling, and using nitrogen displacement furnace atmosphere, furnace temperature starts service work less than bell is opened after uniform temperature again before vertical continuous annealing furnace maintenance.However, because vertical continuous annealing furnace volume is larger, and during production, furnace temperature is higher, causes furnace outage time more long, has a strong impact on the rhythm of production of unit, and unit efficiency is relatively low, influences unit production capacity.
Chinese Patent Application No. discloses a kind of atmosphere method of replacing of continuous annealing furnace for the patent application of CN 201310550386.9, it is characterised in that：The protective atmosphere exchange system being equipped with by continuous annealing furnace body; protective atmosphere is completed when mutually being changed by stainless steel band anneal mode to titanium band anneal mode in continuous annealing furnace to replace; protective atmosphere in stove according to required for technique needs to be by the protective atmosphere Rapid replacement in stove, so as to complete the adjustment of protective atmosphere in stove.The Key of Implementation of the patent be annealing furnace protection exchange system and outer protection gas air supply system together with; when needing displacement; first it is passed through nitrogen and purges annealing furnace to replace furnace atmosphere; needed further according to annealing product protective atmosphere; the protective atmosphere of needs is passed through again; enter line replacement to furnace atmosphere, and its annealing furnace passage is less.Therefore, the method is not particularly suited for producing the vertical continuous annealing furnace of tinning substrate, and is not suitable for the process of the displacement of the furnace atmosphere before vertical continuous annealing furnace blowing out.
The content of the invention
It is an object of the invention to provide a kind of method of the quick blowing out of vertical continuous annealing furnace, furnace temperature process is replaced and reduced to furnace atmosphere when solving vertical continuous annealing furnace blowing out in the prior art slowly, furnace outage time technical problem more long.
The technical solution adopted by the present invention is：
A kind of method of the quick blowing out of vertical continuous annealing furnace, comprises the following steps：
1) hydrogen flowing quantity valve is closed, in vertical continuous annealing furnace starts to lower the temperature preceding 1.5-2 hour regular burden(ing) production process, the hydrogen control valve being passed through in stove is closed；
2) Transition Materials are passed through, after regular burden(ing) production terminates, Transition Materials are passed through in vertical continuous annealing furnace；When first volume Transition Materials head is away from about 1000 meters of annealing furnace entrance, it is 280-350mpm that 500-650mpm during by the speed of service of strip in annealing furnace by normally producing is gradually reduced；
3) using the reduction vertical continuous annealing furnace furnace temperature of falling temperature method stage by stage,
First stage, when regular burden(ing) reaches final cooling section with the weld seam of Transition Materials, the steer mode of vertical continuous annealing furnace is switched into refrigerating mode by production model, it is 500 DEG C to set vertical continuous annealing furnace target furnace temperature, the electric heater of each stove section is closed, vertical continuous annealing furnace starts cooling；
Second stage, when the furnace temperature of vertical continuous annealing furnace is down to 500 DEG C, the speed of service of strip in vertical continuous annealing furnace is gradually reduced to 0, it is 300-400 DEG C to set vertical continuous annealing furnace target furnace temperature, when vertical continuous annealing furnace continues to be cooled to 300-400 DEG C of target furnace temperature, the steer mode of vertical continuous annealing furnace is switched into blowing out pattern by cooling mode；
4）Vertical continuous annealing furnace bell is opened, vertical continuous annealing furnace bringing-up section first and last furnace top cover, soaking zone first and last furnace top cover this 4 furnace top covers are first turned on；Secondly bringing-up section first, centre, furnace bottom cover this 4 furnace bottom covers in the middle of last and soaking zone are opened；Remaining other furnace top covers of vertical continuous annealing furnace and furnace bottom cover are opened after first furnace bottom cover is opened 2-3 hours；Due to vertical continuous annealing furnace bringing-up section and soaking zone furnace temperature highest, first open this four furnace top covers and four furnace bottom covers, the quick flowing of atmosphere inside and outside bringing-up section and soaking zone stove can be promoted, be conducive to the quick reduction of bringing-up section and soaking zone furnace temperature, such that it is able to be rapidly achieved the furnace temperature of comprehensive blow-on lid, shorten furnace outage time.
Further, step 2 of the present invention）In vertical continuous annealing furnace temperature-fall period, the speed of service of the Transition Materials in vertical continuous annealing furnace is 280-350mpm, and effect is preferred.
The applicable vertical continuous annealing furnace of the inventive method includes bringing-up section, soaking zone, 4 stove sections of cooling section and aging section.
The reasons why vertical continuous annealing furnace that the present invention takes quick stopping process, is as follows：
1st, the time control of hydrogen flowing quantity valve is closed
In vertical continuous annealing furnace normal productive process, furnace atmosphere is the mixed gas of 5% hydrogen and 95% nitrogen, and hydrogen and nitrogen are according to 5：95 ratio is continuously replenished furnace atmosphere；And, it is necessary to nitrogen and hydrogen mixture atmosphere in stove is all replaced into nitrogen in vertical continuous annealing furnace furnace shutting down process, not hydrogen, to ensure safety during blowing out blow-on lid.The present invention is before vertical continuous annealing furnace starts cooling; in the normal productive process of regular burden(ing); close hydrogen flowing quantity valve within 1.5-2 hours in advance; only keep nitrogen supplement furnace atmosphere; the hydrogen content in continuous annealing furnace in protective atmosphere can slowly be reduced; the time of nitrogen hydrogen mixeding gas in stove is replaced during reduction thermal purging, and hydrogen content is slowly reduced in protective atmosphere in stove, and the product quality of regular burden(ing) will not be impacted.
2nd, in vertical continuous annealing furnace cooling, the control of the speed of service of the Transition Materials in stove
Due to the operation of Transition Materials in stove, furnace interior point heat can be taken out of, and promote furnace gases flowing towa taud, be conducive to vertical continuous annealing furnace quickly to reduce the Rapid replacement of furnace temperature and furnace atmosphere；But Transition Materials are for the switching of continuous annealing unit specification, stop the coil of strip that transition during machine is used, Transition Materials are reusable, the number of times that the Transition Materials being generally used in furnace shutting down process have been used is more, strip is by after the baking of furnace high-temperature several times, band hardness of steel and hardness are relatively low, if the speed of service is too fast, easily cause the bent even broken belt of Transition Materials strip wooden dipper, so as to the blowing out for influenceing continuous annealing furnace works, extend furnace outage time, and cause the mass loss of Transition Materials.Therefore, in continuous annealing furnace temperature-fall period, the speed of service of the Transition Materials in stove is controlled between 280-350mpm.
3rd, the control of vertical continuous annealing furnace blow-on
Continuous annealing furnace bringing-up section first and last top cover, soaking zone first and last top cover are first opened, altogether 4 top covers；Bringing-up section first, centre, the furnace bottom cover in the middle of last and soaking zone are then turned on, altogether 4 bottoms.Due to vertical continuous annealing furnace bringing-up section and soaking zone furnace temperature highest, open this four furnace top covers and four furnace bottom covers, the quick flowing of atmosphere inside and outside bringing-up section and soaking zone stove can be promoted, be conducive to the quick reduction of bringing-up section and soaking zone furnace temperature, such that it is able to be rapidly achieved the furnace temperature of comprehensive blow-on lid, shorten furnace outage time.
The present invention has following good effect compared to existing technology：
1st, the present invention is by before vertical continuous annealing furnace is lowered the temperature; close hydrogen flowing quantity valve within 1.5-2 hours in advance; only keep protective atmosphere in nitrogen supplementary furnace; allow that the hydrogen content in continuous annealing furnace in protective atmosphere is slowly reduced; on the premise of regular burden(ing) product quality is ensured, the time of furnace atmosphere displacement during thermal purging is effectively reduced；And in above-mentioned 1.5-2 hours, the consumption of nitrogen is consistent with the consumption of nitrogen in normal productive process, the nitrogen use level when present invention effectively reduces vertical continuous annealing furnace blowing out during thermal purging.
2nd, the inventive method controls the speed of service of the Transition Materials in continuous annealing furnace by optimizing Transition Materials, effectively increases the reduction speed of continuous annealing furnace furnace temperature, has reached the purpose for shortening the descent of temperature time；Meanwhile, the wooden dipper song broken belt risk of Transition Materials is reduced, reduce the mass loss of Transition Materials.
3rd, the inventive method technology controlling and process is simple, on the premise of personnel and equipment safety have been fully ensured that, effectively reduces the time of vertical continuous annealing furnace blowing out, improves the efficiency and unit production capacity of vertical continuous annealing furnace.
Specific embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that following specific embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.
A kind of method of the quick blowing out of vertical continuous annealing furnace, is passed through that transition is rolled up, substep reduces the quick blowing out that furnace temperature, blowing out, blow-on lid realize vertical continuous annealing furnace by closing in advance in hydrogen flowing quantity valve, stove,
Vertical continuous annealing furnace is in normal productive process, and protective atmosphere is the mixed gas of 5% hydrogen and 95% nitrogen in stove, and hydrogen and nitrogen are according to 5：95 ratio is constantly passed through in stove, the loss of protective atmosphere in supplementary furnace.Regular burden(ing) thickness specification is 0.21mm in stove, and width is 850mm, according to repair schedule arrangement, the production of regular burden(ing) is terminated after 2 hours, and vertical continuous annealing furnace starts cooling, carries out overhauling preceding blowing out work；
Now, the hydrogen control valve being passed through in stove is closed, nitrogen supplement furnace atmosphere is only kept, nitrogen flow is 1700-1800Nm3/ h, hydrogen content starts slow decline in furnace atmosphere；After regular burden(ing) production terminates, Transition Materials are passed through in vertical continuous annealing furnace stove, Transition Materials thickness is 0.21-0.25mm, and width is 850-900mm；And when in first volume Transition Materials head away from about 1000 meters of annealing furnace entrance, it is 280-350mpm that 500-650mpm when the speed of service of strip is by normally producing in annealing furnace is gradually reduced, and the speed of service of the Transition Materials in stove is controlled between 280-350mpm afterwards；
When the weld seam of concluding volume regular burden(ing) and first volume Transition Materials reaches the cooling section of vertical continuous annealing furnace, vertical continuous annealing furnace switches to refrigerating mode by production model, furnace temperature is set to 500 DEG C, closes the electric heater of each stove section, and vertical continuous annealing furnace starts cooling；Vertical continuous annealing furnace starts thermal purging simultaneously, and line replacement is entered to continuous annealing furnace furnace atmosphere using nitrogen, and now nitrogen flow is 2800-3500Nm3/h；When the furnace temperature of vertical continuous annealing furnace is down to 500 DEG C, the speed of service of strip in stove is gradually reduced until strip is out of service；After strip is out of service in continuous annealing furnace stove, furnace temperature is set to 300-400 DEG C, continues the cooling of continuous annealing furnace, until when furnace temperature is down to 300-400 DEG C, all analyzers in stove are closed, stops thermal purging, continuous annealing furnace switches to blowing out pattern by cooling mode；
After vertical continuous annealing furnace blowing out, continuous annealing furnace bringing-up section first and last furnace top cover, soaking zone first and last furnace top cover are first opened, altogether 4 furnace top covers；Bringing-up section first, centre, the furnace bottom cover in the middle of last and soaking zone are then turned on, 4 furnace bottom covers, are easy to the fast cooling of vertical continuous annealing furnace high temperature section altogether；After other furnace top covers and furnace bottom cover is opened after 2-3 hours again, the blowing out of vertical continuous annealing furnace is completed.
Claims (2)
1. the method for the quick blowing out of a kind of vertical continuous annealing furnace, it is characterized in that, the described method comprises the following steps：
1) hydrogen flowing quantity valve is closed, in vertical continuous annealing furnace starts to lower the temperature preceding 1.5-2 hour regular burden(ing) production process, the hydrogen control valve being passed through in stove is closed；
2) Transition Materials are passed through, after regular burden(ing) production terminates, Transition Materials are passed through in vertical continuous annealing furnace；When first volume Transition Materials head is away from about 1000 meters of annealing furnace entrance, it is 280-350mpm that 500-650mpm during by the speed of service of strip in annealing furnace by normally producing is gradually reduced；
3) using the reduction vertical continuous annealing furnace furnace temperature of falling temperature method stage by stage,
First stage, when regular burden(ing) reaches final cooling section with the weld seam of Transition Materials, the steer mode of vertical continuous annealing furnace is switched into refrigerating mode by production model, it is 500 DEG C to set vertical continuous annealing furnace target furnace temperature, the electric heater of each stove section is closed, vertical continuous annealing furnace starts cooling；
Second stage, when the furnace temperature of vertical continuous annealing furnace is down to 500 DEG C, the speed of service of strip in vertical continuous annealing furnace is gradually reduced to 0, it is 300-400 DEG C to set vertical continuous annealing furnace target furnace temperature, when vertical continuous annealing furnace continues to be cooled to 300-400 DEG C of target furnace temperature, the steer mode of vertical continuous annealing furnace is switched into blowing out pattern by cooling mode；
4）Vertical continuous annealing furnace bell is opened, vertical continuous annealing furnace bringing-up section first and last furnace top cover, soaking zone first and last furnace top cover this 4 furnace top covers are first turned on；Secondly bringing-up section first, centre, furnace bottom cover this 4 furnace bottom covers in the middle of last and soaking zone are opened；Remaining other furnace top covers of vertical continuous annealing furnace and furnace bottom cover are opened after first furnace bottom cover is opened 2-3 hours.
2. a kind of method of the quick blowing out of vertical continuous annealing furnace as claimed in claim 1, it is characterized in that, in the vertical continuous annealing furnace temperature-fall period, the speed of service of the Transition Materials in vertical continuous annealing furnace is 280-350mpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901650.8A CN106854697B (en) | 2015-12-09 | 2015-12-09 | A kind of method of the quick blowing out of vertical continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901650.8A CN106854697B (en) | 2015-12-09 | 2015-12-09 | A kind of method of the quick blowing out of vertical continuous annealing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106854697A true CN106854697A (en) | 2017-06-16 |
| CN106854697B CN106854697B (en) | 2018-10-26 |
Family
ID=59132188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510901650.8A Active CN106854697B (en) | 2015-12-09 | 2015-12-09 | A kind of method of the quick blowing out of vertical continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106854697B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551889A (en) * | 2018-06-01 | 2019-12-10 | 上海梅山钢铁股份有限公司 | rapid shutdown control method for thin plate of vertical continuous annealing unit |
| CN112981091A (en) * | 2019-12-12 | 2021-06-18 | 上海梅山钢铁股份有限公司 | Control method for fast conveying belt after shutdown of continuous annealing furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100929A (en) * | 1979-01-24 | 1980-08-01 | Nippon Steel Corp | Temperature control for continuous heating furnace |
| CN104342535A (en) * | 2013-07-29 | 2015-02-11 | 宝山钢铁股份有限公司 | Method and apparatus for cooling multi-atmosphere segment continuous annealing furnace |
-
2015
- 2015-12-09 CN CN201510901650.8A patent/CN106854697B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100929A (en) * | 1979-01-24 | 1980-08-01 | Nippon Steel Corp | Temperature control for continuous heating furnace |
| CN104342535A (en) * | 2013-07-29 | 2015-02-11 | 宝山钢铁股份有限公司 | Method and apparatus for cooling multi-atmosphere segment continuous annealing furnace |
Non-Patent Citations (1)
| Title |
|---|
| 湖南株洲21号信箱生产指挥部技术情报室编: "真空连续生产", 《硬质合金》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551889A (en) * | 2018-06-01 | 2019-12-10 | 上海梅山钢铁股份有限公司 | rapid shutdown control method for thin plate of vertical continuous annealing unit |
| CN110551889B (en) * | 2018-06-01 | 2022-05-10 | 上海梅山钢铁股份有限公司 | Rapid shutdown control method for thin plate of vertical continuous annealing unit |
| CN112981091A (en) * | 2019-12-12 | 2021-06-18 | 上海梅山钢铁股份有限公司 | Control method for fast conveying belt after shutdown of continuous annealing furnace |
| CN112981091B (en) * | 2019-12-12 | 2022-04-15 | 上海梅山钢铁股份有限公司 | Control method for fast conveying belt after shutdown of continuous annealing furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106854697B (en) | 2018-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103276191B (en) | Purge method for annealing of low-carbon cold-roll steel sheets | |
| CN102061351B (en) | Method for producing low-carbon steel and ultra-low-carbon steel by VD, LF and VD processes | |
| CN104212952B (en) | The subsection blowing control method of atmosphere in vertical continuous annealing furnace stove | |
| CN106191674A (en) | Low cost continuous casting billet is become a useful person big thickness steel plate for low temperature pressure container and production method | |
| CN101532119B (en) | Production device and technique used both for hot galvanizing and continuous annealing | |
| CN108070707B (en) | A kind of method of the quick furnace lifting of vertical continuous annealing furnace | |
| CN101643829A (en) | Cold rolling orientation silicon steel production technology | |
| CN107502712A (en) | A kind of copper strips bell-type annealing technique | |
| CN109735692A (en) | A kind of steel staged annealing process | |
| CN111424149A (en) | Gear steel strip-shaped structure control process | |
| CN103555924B (en) | Atmosphere replacement system of continuous annealing furnace | |
| CN106854697A (en) | A kind of method of the quick blowing out of vertical continuous annealing furnace | |
| CN203569154U (en) | Horizontal continuous annealing furnace for annealing titanium belt and steel belt | |
| CN110468326A (en) | A kind of LNG storage tank ultra-thin specification 16MnDR steel plate and its manufacturing method | |
| CN102277473B (en) | Production process capable of improving qualification rate in flaw detection of medium steel plates | |
| CN103555925B (en) | Vertical continuous annealing furnace for annealing titanium plates and steel strips | |
| CN109797271B (en) | Method for quickly producing continuous annealing furnace again | |
| CN103589853B (en) | Horizontal continuous annealing furnace for annealing titanium belt and steel belt | |
| CN103555926B (en) | Atmosphere replacement method of continuous annealing furnace | |
| CN106884131A (en) | The technique and continuous hot dip galvanizing steel belt annealing furnace of a kind of steel plate secondary galvanization | |
| CN107619984A (en) | A kind of production method of high pressure smelting high-nitrogen steel | |
| CN203569153U (en) | Vertical continuous annealing furnace for annealing titanium plates and steel strips | |
| CN112108525A (en) | Air cooling control method for reducing temperature of rolled piece and steel rolling production line | |
| CN101481751B (en) | Cooling method for electrical heating vertical furnace | |
| JPS5811493B2 (en) | Continuous annealing equipment for cold rolled steel strip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |