CN108070707B - A kind of method of the quick furnace lifting of vertical continuous annealing furnace - Google Patents
A kind of method of the quick furnace lifting of vertical continuous annealing furnace Download PDFInfo
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- CN108070707B CN108070707B CN201611004437.8A CN201611004437A CN108070707B CN 108070707 B CN108070707 B CN 108070707B CN 201611004437 A CN201611004437 A CN 201611004437A CN 108070707 B CN108070707 B CN 108070707B
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- 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
- C21D9/54—Furnaces for treating strips or wire
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- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
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Abstract
The present invention relates to a kind of method of the quick furnace lifting of vertical continuous annealing furnace, solve the problem of after vertical continuous annealing furnace maintenance down in the prior art that the furnace lifting time longer influences rhythm of production and production capacity.The method of the quick furnace lifting of vertical continuous annealing furnace of the present invention, comprising: after vertical continuous annealing furnace maintenance, confirm the furnace lifting condition of vertical continuous annealing furnace；The furnace atmosphere of vertical continuous annealing furnace carries out pure nitrogen gas purging；Vertical continuous annealing furnace heats up；The furnace atmosphere of vertical continuous annealing furnace carries out hydrogeneous purging；Control the starting operation of vertical continuous annealing furnace strip.The method of the present invention is simple to operation, effectively increases the production efficiency and production capacity of vertical continuous annealing furnace.
Description
Technical field
The present invention relates to the technical field of vertical continuous annealing furnace, in particular to a kind of quick furnace lifting of vertical continuous annealing furnace
Method.
Background technique
Continuous annealing furnace is used to the strip for generating processing hardening after cold rolling carrying out recrystallization annealing, improves microstructure,
Plasticity and punching formation property are improved, and guarantees that surface is not oxidized.Continuous annealing merges several independent processes of bell-type annealing
After a unit, the production cycle shortened to an at most hour by original 10 days or so, and production stock subtracts greatly, production process
Simplify, convenient for management, productivity greatly improves.
Vertical continuous annealing furnace be mainly used for uncoated tinplate base annealing production, vertical continuous annealing furnace by preheating section (JPF),
Bringing-up section (RTF), soaking zone (SF), slow cooling section (SCS), rapid cooling section (RCS), aging section 1 (OAS1), aging section 2 (OAS2), when
Imitate section 3 (OAS3), final cooling section (FCS) and water quenching cooling section composition.The gas that strip in furnace is made of nitrogen and hydrogen
It protects and will not aoxidize.Therefore, it before vertical continuous annealing furnace maintenance down blow-on lid, needs to purge furnace atmosphere
Displacement, while carrying out cooling operation.After maintenance terminates, before booting production, needs to purge the atmosphere in furnace, arrange
Except the air in furnace, it is replaced as the protective gas being made of nitrogen and hydrogen, is reduced to furnace internal oxidition amount and meets production requirement
In the range of, and furnace temperature is warming up to normal temperature required for producing, strip speed reaches required for normal production in furnace
Speed, production model could be switched and carry out production merchantable timber.However, since the general volume of vertical continuous annealing furnace is larger, and
Furnace temperature is higher when production, longer so as to cause the furnace atmosphere purge time after annealing furnace maintenance when furnace lifting, when preparing before producing
Between it is longer, cause the continuous annealing furnace furnace lifting time longer, seriously affect the rhythm of production of continuous annealing furnace, influence unit production capacity.
Application publication number is that the Chinese patent of CN103710524A discloses a kind of Ignition method of continuous annealing furnace,
The following steps are included: 1) to NOF furnace, RTF furnace, SF furnace, RJC furnace leak test, pipeline leak test；2) confirm that each valve of pipeline and stokehold closes
It closes, zero valve is closed；3) zero valve blind plate of nitrogen is extracted first, and each valve of pipeline is opened with this；4) oxygen content in furnace is measured；
5) zero valve of nitrogen and each valve of gaspipe line are successively opened；6) it closes nitrogen and purges gas pipeline valve, block up nitrogen and purge coal gas
Blind plate；7) detonation test is done after coal gas replacement；8) stokehold igniting will open burner one by one, and burner is lighted a fire one by one.The spy of the patent
Point be effectively prevent as valve leaks or blind plate not sternly etc. caused by gas leakage, thoroughly avoided from angle is misplaced
In gas leakage to furnace caused by during annealing furnace furnace lifting, or even the hidden danger such as explosion, it ensure that in the safety and furnace of furnace lifting and be
Protective atmosphere, but the patent only accounts for the safety of Ignition process, does not refer to the specific method in purge
And parameter, it is affected to rhythm of production.
Application publication number is that the Chinese patent document of CN103555926A discloses a kind of atmosphere displacement of continuous annealing furnace
Method, it is characterised in that: the protective atmosphere exchange system being equipped with by continuous annealing furnace body, by stainless in continuous annealing furnace
Strip anneal mode is completed protective atmosphere when mutually convert to titanium band anneal mode and is replaced, according to process requirement by the protection in furnace
Atmosphere Rapid replacement is protective atmosphere in required furnace, to complete the adjustment of protective atmosphere in furnace.The implementation of the patent is closed
Key is the protection exchange system of annealing furnace and outer protection gas air supply system mutually together with being first passed through nitrogen when needing to replace
It purges annealing furnace to need to replace furnace atmosphere further according to annealing product protective atmosphere, then is passed through the protective atmosphere of needs, to furnace
Interior atmosphere is replaced, and its annealing furnace passage is less (2 passages of vertical annealing furnace, 1 passage of Horizental annealer), therefore,
This method is not particularly suited for the vertical continuous annealing furnace of production tinning substrate.
Application publication number is that the Chinese patent document of CN103276191A discloses one kind for low-carbon cold rolling steel plate annealing
Blowing method, blowing method first carry out walk-through oxygen at least one hour of nitrogen flushing to the oxygen content in annealing furnace less than 1%,
Then it carries out denitrogen and blows the hydrogen at least 50 minutes nitrogen being discharged in the annealing furnace, then protected during heating
Property blows hydrogen to steel roll temperature and reaches 650 DEG C, while guaranteeing that the protectiveness blows the purging duration of hydrogen from starting to carry out the protection
Property when blowing hydrogen from continue at least eight hours, then restoring again property blows hydrogen and fillibility blows hydrogen, completes once to low-carbon cold rolling
The purging work of steel plate annealing processing.The characteristics of patent be suitable for the annealing production process of bell type annealing furnace, and it is uncomfortable
For the purge before vertical continuous annealing furnace booting production.
The Chinese patent document that application publication number is CN104212952A discloses atmosphere in a kind of vertical continuous annealing furnace furnace
The subsection blowing control method enclosed, for the inventive method its main feature is that when cold blowing is swept in furnace, bleeding valve opening degree sets 30%；
Make 480 DEG C -520 DEG C of bringing-up section, soaking section temperature, slow cooling section, rapid cooling section temperature are 240 DEG C -260 DEG C, and aging section temperature is
440℃-460℃；When atmosphere oxygen content≤5000ppm in furnace, purged using nitrogen hydrogen mixeding gas.The characteristics of invention is logical
The opening degree and furnace temperature for crossing setting bleeding valve, facilitate the outflow of oxygen-containing gas in furnace；But due to vertical continuous annealing furnace
The furnace body size of each furnace section and structure are different, and the fall off rate of oxygen content is different in each furnace section, cannot be real using the inventive method
Now the difference control of each furnace section, the furnace section for be easy to causeing some oxygen content fall off rate slow influence the purging of entire continuous annealing furnace
Time, to affect the effective production time and unit production capacity of unit.Meanwhile for vertical continuous annealing is further effectively reduced
The furnace furnace lifting time, vertical continuous annealing furnace steam line has carried out part and has been transformed, after which is not suitable for pipeline modification
Vertical continuous annealing furnace.
Summary of the invention
The object of the present invention is to provide a kind of methods of the quick furnace lifting of vertical continuous annealing furnace, solve vertical in the prior art
The problem of furnace lifting time is longer after continuous annealing furnace maintenance down, influences rhythm of production and unit production capacity.
The present invention is realized by the optimization of the methods of the purging of vertical continuous annealing furnace stokehold, heating, starting operation
Quick furnace lifting after vertical continuous annealing furnace maintenance down shortens the furnace lifting time, and the effective production time and unit for improving unit produce
Can, the waste of the media such as nitrogen is reduced, the mass loss of transition volume is reduced.
The technical solution adopted by the present invention is that: a kind of method of the quick furnace lifting of vertical continuous annealing furnace, this method comprises:
After vertical continuous annealing furnace maintenance, the furnace lifting condition of vertical continuous annealing furnace is confirmed；It is vertical continuously to move back
The furnace atmosphere of stove carries out pure nitrogen gas purging；Vertical continuous annealing furnace heats up；In the furnace of vertical continuous annealing furnace
Atmosphere carries out hydrogeneous purging；Control the starting operation of vertical continuous annealing furnace strip.
The step of furnace lifting condition of the confirmation vertical continuous annealing furnace is the furnace top cover for confirming vertical continuous annealing furnace
It has been installed with furnace bottom cover and leakproofness is good, confirmed that water level of quenching is in work liquid level, confirm inlet/outlet sealed roller
In investment state, blower power transmission is confirmed, confirm that the leakproofness of vertical continuous annealing furnace is good and has furnace lifting condition.
The step of furnace atmosphere progress pure nitrogen gas purging of the vertical continuous annealing furnace is to open nitrogen flow valve
With the steam line valve of each furnace section of vertical continuous annealing furnace, carried out using the furnace atmosphere of the vertical continuous annealing furnace of pure nitrogen gas
The flow of displacement purging, nitrogen is not less than 7500Nm3/h。
The step of vertical continuous annealing furnace is heated up is bringing-up section and soaking zone in vertical continuous annealing furnace
Radiant tube start firing up, set vertical continuous annealing furnace first stage furnace temperature as 300 DEG C；Set vertical continuous annealing furnace
Second stage furnace temperature is 500 DEG C；The electric heater of aging section is opened, electric heater capacity is controlled 60%.
The step of furnace atmosphere progress hydrogeneous purging of the vertical continuous annealing furnace, is, to vertical continuous annealing furnace
Furnace temperature reach 500 DEG C after, carry out nitrogen and hydrogen mixing, nitrogen and hydrogen mixed proportion are 95:5, using nitrogen and hydrogen
The furnace atmosphere of the vertical continuous annealing furnace of mixed gas continue to purge.
The step of control vertical continuous annealing furnace strip starting operation, is, in the furnace atmosphere of vertical continuous annealing furnace
When oxygen content≤300ppm, the strip manipulated in vertical continuous annealing furnace brings into operation, the furnace temperature setting of vertical continuous annealing furnace
Value rises to 550 DEG C by 500 DEG C, and the steel strip in continuous annealing furnace speed of service is 50-60mpm.
Further, the vertical continuous annealing furnace furnace atmosphere carry out pure nitrogen gas purging the step of be, by rapid cooling
Section, aging section 1, aging section 2, aging section 3 and the opening degree of cold section of bleeding valve is opened manually to 100% eventually, to preheating section,
The opening degree of bringing-up section and slow cooling section bleeding valve is first set as 0, and soaking zone bleeding valve opening degree is set as 50%；It adjusts
The opening degree for controlling preheating section, bringing-up section, soaking zone and slow cooling section diffusion valve, controls furnace pressure >=130Pa of vertical continuous annealing furnace.
Further, the vertical continuous annealing furnace furnace atmosphere carry out hydrogeneous purging the step of be, it is vertical
After the hydrogeneous purging of the furnace atmosphere of continuous annealing furnace starts 1 hour, the bleeding valve of all vertical continuous annealing furnaces is open
Degree is adjusted to 50%, controls furnace pressure >=200Pa of vertical continuous annealing furnace.
The reasons why the method for the present invention parameter setting, is as follows:
1, the setting of diffusion valve opening degree
Since the aging section 1 of vertical continuous annealing furnace, aging section 2,3 three sections of aging section of furnace body are longer, in furnace lifting process
In, it is to cause furnace lifting time longer main cause that three sections of oxygen content decline is most slow.The present invention is used to be purged in pure nitrogen gas
In the process by rapid cooling section, aging section 1, aging section 2, aging section 3 and eventually cold section bleeding valve opening degree open manually to
100%, be conducive to the quick discharge of aging section 1, aging section 2, the intracorporal atmosphere of 3 furnace of aging section, quickly reduce aging section 1, when
Oxygen content in effect section 2,3 furnace body of aging section in atmosphere is conducive to shorten entire vertical continuous annealing furnace furnace atmosphere displacement
Time.Simultaneously as having newly increased the nitrogen by-pass line of hybrid station 2, aging section 1, aging section 2 and aging section 3 respectively increase by one
Road purging pipeline, so that the purging nitrogen flow into aging section 1, aging section 2,3 furnace section of aging section increases 1500Nm3/
H, thus by rapid cooling section, aging section 1, aging section 2, aging section 3 and eventually cold section bleeding valve opening degree open manually to
When 100%, it is too low not will lead to furnace pressure, can promote aging section 1, aging section under the premise of guaranteeing that furnace pressure is not less than 13dapa
2, in 3 furnace body of aging section atmosphere quick discharge.
2, during firing up temperature setting
After pure nitrogen gas purging starts, vertical continuous annealing furnace firing up keeps furnace atmosphere heated, is conducive to gas in furnace
The quick exclusion of atmosphere, can effectively reduce purge time；But pure nitrogen gas purge just start when, in furnace atmosphere oxygen content compared with
Height, excessively high temperature are easy to cause transition coiled strip steel severe oxidation in furnace, open so as to cause the strip in vertical continuous annealing furnace
Operation strip begin there are the disconnected band risk of biggish wooden dipper song, therefore, in vertical continuous annealing furnace firing up step, furnace temperature is first set
It is 300 DEG C, the electrical heating power of aging section 1, aging section 2 and aging section 3 is opened to 60%, and after half an hour, the oxygen of furnace atmosphere contains
Amount has been greatly reduced, then furnace temperature is set as 500 DEG C.
3, in vertical continuous annealing furnace furnace strip starting the speed of service setting
Air inlet and furnace roof diverging duct position since vertical continuous annealing furnace furnace body is larger, and due to purge gas
Limitation lead in part furnace section and the atmosphere of partial region oxygen content decline slowly there are gas displacement dead zone in furnace, thus
Influence purge time and the furnace lifting time of entire annealing furnace.Strip starting operation in furnace, the movement that can use strip accelerate furnace
The flowing of interior atmosphere is conducive to the Rapid replacement of furnace atmosphere.Therefore when oxygen content≤300ppm in furnace atmosphere, band in furnace
Steel starting operation.Simultaneously as at this time, strip is transition volume in furnace, and oxygen content wants high more during normal production in furnace, transition volume
In furnace after baking and oxidation after a period of time, the strength reduction of transition coiled strip steel, if strip speed is too fast, meeting
It is bent to cause strip wooden dipper, and the amount of being oxidized of strip is caused to increase, the mass loss for causing transition to roll up；If strip speed
It is too low, it is unfavorable for the flowing of furnace atmosphere, cannot achievees the purpose that promote furnace atmosphere Rapid replacement.Therefore, to furnace atmosphere
When middle oxygen content≤300ppm, strip starting is run in furnace, and strip speed is 50-60mpm in furnace.
The present invention has following good effect compared with prior art: 1, the present invention is put by vertical continuous annealing furnace furnace roof
The control and regulation of valve opening degree are dissipated, so that the quick exclusion of annealing furnace aging section 1, aging section 2, the intracorporal atmosphere of 3 furnace of aging section,
Quickly reduce the oxygen content of this three furnaces section；And by firing up in furnace, the temperature of furnace atmosphere is improved, and to furnace atmosphere
When middle oxygen content≤300ppm, the method that the strip in vertical continuous annealing furnace brings into operation is manipulated, is effectively shortened entire vertical
The time of formula continuous annealing furnace furnace atmosphere displacement, realize the quick furnace lifting of vertical continuous annealing furnace.2, the present invention is by point
Strip speed control when the strip in temperature control and manipulation vertical continuous annealing furnace when fire heating brings into operation, is guaranteeing
While furnace atmosphere Rapid replacement, the wooden dipper style of song danger that transition in furnace is rolled up is effectively reduced, transition is reduced and rolls up the hair being oxidized
Raw amount, reduces the mass loss of transition volume, while reducing the disconnected band risk during vertical continuous annealing furnace furnace lifting.3, originally
Inventive method is simple to operation, slightly improves on conventional vertical continuous annealing furnace, vertical continuous annealing furnace can be realized
Quick furnace lifting effectively increases the production efficiency and production capacity of vertical continuous annealing furnace.
Specific embodiment
With reference to embodiment, the present invention is furture elucidated, it should be understood that following specific embodiments are only used for
It is bright the present invention rather than limit the scope of the invention.
A kind of method of the quick furnace lifting of vertical continuous annealing furnace, this method comprises:
After vertical continuous annealing furnace maintenance, the furnace lifting condition of vertical continuous annealing furnace is confirmed；It is vertical continuously to move back
The furnace atmosphere of stove carries out pure nitrogen gas purging；Vertical continuous annealing furnace heats up；In the furnace of vertical continuous annealing furnace
Atmosphere carries out hydrogeneous purging；Control the starting operation of vertical continuous annealing furnace strip.
The step of furnace lifting condition of the confirmation vertical continuous annealing furnace is the furnace top cover for confirming vertical continuous annealing furnace
It has been installed with furnace bottom cover and leakproofness is good, confirmed that water level of quenching is in work liquid level, confirm inlet/outlet sealed roller
In investment state, blower power transmission is confirmed, confirm that the leakproofness of vertical continuous annealing furnace is good and has furnace lifting condition.
The step of furnace atmosphere progress pure nitrogen gas purging of the vertical continuous annealing furnace is to open 1 He of hybrid station
The steam line valve of each furnace section of the nitrogen flow valve and vertical continuous annealing furnace of hybrid station 2 opens 2# hybrid station nitrogen pipeline
Newly-increased bypath valve opens 1,2, the 3 leg bypass valve of newly-increased pipeline of aging section 1, aging section 2, aging section 3, nitrogen
Flow control is 7500Nm3/ h carries out displacement purging using the furnace atmosphere of the vertical continuous annealing furnace of pure nitrogen gas；By rapid cooling
Section, aging section 1, aging section 2, aging section 3 and the opening degree of cold section of bleeding valve is opened manually to 100% eventually, to preheating section,
The opening degree of bringing-up section and slow cooling section bleeding valve is first set as 0, and soaking zone bleeding valve opening degree is set as 50%；It adjusts
The opening degree for controlling preheating section, bringing-up section, soaking zone and slow cooling section diffusion valve, controls furnace pressure >=130Pa of vertical continuous annealing furnace.
Pure nitrogen gas purging start after, vertical continuous annealing furnace carries out igniting preparation immediately, to exhaust piping carry out purging and
After the completion of gas piping leakage test, exhaust piping purging and gas piping leakage test, bringing-up section in vertical continuous annealing furnace
Start firing up with the radiant tube of soaking zone, sets vertical continuous annealing furnace first stage furnace temperature as 300 DEG C；Aging section 1, when
The electrical heating power of effect section 2 and aging section 3 is opened to 60%；Radiant tube firing up half an hour in hot arc and soaking zone to be added
Afterwards, vertical continuous annealing furnace second stage furnace temperature is set as 500 DEG C.
The step of furnace atmosphere progress hydrogeneous purging of the vertical continuous annealing furnace is vertical continuous annealing furnace furnace
After temperature reaches 500 DEG C, opens hydrogen control valve door and carry out nitrogen and hydrogen mixing, nitrogen and hydrogen mixed proportion are 95:5, are adopted
Continue to purge with atmosphere in the vertical continuous annealing furnace furnace of the mixed gas of nitrogen and hydrogen；Vertical continuous annealing furnace is hydrogeneous
After purging starts 1 hour, all bleeding valve opening degrees are adjusted to 50%, control the furnace pressure of vertical continuous annealing furnace >=
200Pa。
The step of control vertical continuous annealing furnace strip starting operation is the furnace atmosphere to vertical continuous annealing furnace
When middle oxygen content≤300ppm, the strip manipulated in vertical continuous annealing furnace brings into operation, steel strip in continuous annealing furnace operation speed
Degree is 50-60mpm, and the furnace temperature of vertical continuous annealing furnace is set as 550 DEG C；To oxygen content in the furnace of vertical continuous annealing furnace≤
When 100ppm, vertical continuous annealing furnace starts to warm up raising speed, and the quick furnace lifting of vertical continuous annealing furnace is completed.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (3)
1. a kind of method of the quick furnace lifting of vertical continuous annealing furnace, characterized in that this method comprises:
After vertical continuous annealing furnace maintenance, the furnace lifting condition of vertical continuous annealing furnace is confirmed；Vertical continuous annealing furnace
Furnace atmosphere carry out pure nitrogen gas purging；Vertical continuous annealing furnace heats up；The furnace atmosphere of vertical continuous annealing furnace
Carry out hydrogeneous purging；Control the starting operation of vertical continuous annealing furnace strip；The confirmation vertical continuous annealing furnace plays fire bars
The step of part is to confirm that the furnace top cover of vertical continuous annealing furnace and furnace bottom cover have been installed and leakproofness is good, and confirmation is quenched
Water level is in work liquid level, and confirmation inlet/outlet sealed roller is in investment state, confirms blower power transmission, and confirmation is vertical continuously to move back
The leakproofness of stove is good and has furnace lifting condition；The furnace atmosphere of the vertical continuous annealing furnace carries out pure nitrogen gas purging
The step of be, by rapid cooling section, aging section 1, aging section 2, aging section 3 and eventually cold section bleeding valve opening degree open manually to
100%, the steam line valve of nitrogen flow valve and each furnace section of vertical continuous annealing furnace is opened, it is vertical continuous using pure nitrogen gas
The furnace atmosphere of annealing furnace carries out displacement purging, and the flow of nitrogen is not less than 7500Nm3/h；The vertical continuous annealing furnace
The step of being heated up is that the radiant tube of bringing-up section and soaking zone starts firing up in vertical continuous annealing furnace, is set vertical
Continuous annealing furnace first stage furnace temperature is 300 DEG C；Vertical continuous annealing furnace second stage furnace temperature is set as 500 DEG C；Open timeliness
The electric heater of section, electric heater capacity are controlled 60%；The furnace atmosphere of the vertical continuous annealing furnace carries out hydrogeneous
The step of purging, is, after the furnace temperature of vertical continuous annealing furnace reaches 500 DEG C, carries out nitrogen and hydrogen mixing, nitrogen and hydrogen
Mixed proportion is 95:5, and the furnace atmosphere using the vertical continuous annealing furnace of the mixed gas of nitrogen and hydrogen continues to blow
It sweeps；The step of control vertical continuous annealing furnace strip starting operation is that oxygen contains in the furnace atmosphere of vertical continuous annealing furnace
When amount≤300ppm, the strip manipulated in vertical continuous annealing furnace brings into operation, the furnace temperature setting value of vertical continuous annealing furnace by
500 DEG C rise to 550 DEG C, and the steel strip in continuous annealing furnace speed of service is 50-60m/min.
2. a kind of method of the quick furnace lifting of vertical continuous annealing furnace as described in claim 1, characterized in that the vertical company
The step of furnace atmosphere of continuous annealing furnace carries out pure nitrogen gas purging is, to preheating section, bringing-up section and slow cooling section bleeding valve
Opening degree is first set as 0, and soaking zone bleeding valve opening degree is set as 50%；It is gentle to regulate and control preheating section, bringing-up section, soaking zone
The opening degree of cold section of diffusion valve controls furnace pressure >=130Pa of vertical continuous annealing furnace.
3. a kind of method of the quick furnace lifting of vertical continuous annealing furnace as described in claim 1, characterized in that described is vertical
The step of furnace atmosphere progress hydrogeneous purging of continuous annealing furnace is that the hydrogeneous purging of the furnace atmosphere of vertical continuous annealing furnace is opened
After beginning 1 hour, the bleeding valve opening degree of all vertical continuous annealing furnaces is adjusted to 50%, controls vertical continuous annealing furnace
Furnace pressure >=200Pa.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109797271B (en) * | 2019-02-28 | 2020-11-20 | 马钢(合肥)板材有限责任公司 | Method for quickly producing continuous annealing furnace again |
| CN110643805B (en) * | 2019-08-30 | 2021-03-26 | 邯郸钢铁集团有限责任公司 | Furnace chamber atmosphere fluctuation pressurization replacement method for continuous annealing furnace |
| CN110699525B (en) * | 2019-09-26 | 2021-11-05 | 首钢京唐钢铁联合有限责任公司 | Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace |
| CN110819772B (en) * | 2019-10-28 | 2021-04-02 | 鞍钢股份有限公司 | Nitrogen-hydrogen protective gas control method for continuous annealing furnace |
| CN114231704A (en) * | 2021-12-20 | 2022-03-25 | 本钢板材股份有限公司 | Method for quickly replacing atmosphere in vertical annealing furnace |
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| JP6112042B2 (en) * | 2014-02-26 | 2017-04-12 | Ｊｆｅスチール株式会社 | Startup method of continuous annealing furnace |
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| CN103147084A (en) * | 2013-01-23 | 2013-06-12 | 新余钢铁集团有限公司 | Vertical continuous annealing furnace bluing device and bluing technology thereof |
| CN104212952A (en) * | 2013-06-03 | 2014-12-17 | 上海梅山钢铁股份有限公司 | Subsection blowing control method of atmosphere in vertical continuous annealing furnace |
| CN103555926A (en) * | 2013-11-08 | 2014-02-05 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement method for continuous annealing furnace |
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| CN103710524A (en) * | 2014-01-06 | 2014-04-09 | 鞍钢股份有限公司 | Ignition method of continuous annealing furnace |
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