CN104789859B - Method for producing peritectic steel by using medium-thin slab continuous caster - Google Patents
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Abstract
The invention discloses a method for producing peritectic steel by using a medium-thin slab continuous caster. The method comprises the following steps: converter steelmaking, external refining of an LF furnace, and continuous casting of the medium-thin slab continuous caster. According to the invention, the entire process of converter steelmaking, LF furnace refining and continuous casting of the medium-thin slab continuous caster is controlled, so that the crystallizer liquid level fluctuation range is controlled within +/-3 mm; the deoxidization and alloying of the steelmaking process are controlled to enable the steel inclusions to be mainly spessartine with low melting point and strong plasticity; in the refining process, the secondary oxidation of molten steel is reduced, and an argon system is designed reasonably to ensure the maximum flotation of the inclusions; during continuous casting, the pouring is protected, the secondary oxidation of molten steel is reduced, the properties of the inclusions in the molten steel are changed, and the pourability is improved, so that the mass normal stable production of peritectic steels by using the medium-thin slab continuous caster is realized.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, more particularly, to a kind of medium and thin slab continuous caster the side of peritectic steel is produced
Method.
Background technology
Molten steel comprising the C that percentage by weight is 0.09%～0.17% can occur peritectic reaction (L+ in process of setting
δ-γ), there is volume contraction, and phosphorus content is higher, cooling velocity is bigger, volume contraction is bigger.Due to the presence of alloying element
, there is C content needed for peritectic reaction also not in γ phase regions that can expand or reduce in Fe-C alloy phase diagrams, therefore steel grade is different
Together.
Medium and thin slab continuous caster produces the problem run into during the relatively low peritectic steels of Mn/Si and is mainly：1. mold liquid level ripple
Move excessive, generally ± 15mm；2., because steel grade Mn/Si is very low, the field trash generated in molten steel is mainly SiO2, castability
It is poor.
Liquid level fluctuation of crystallizer is excessive to be to cause the main cause of the defects such as casting billet surface slag inclusion, pit, lobe, or even sends out
Raw bleed-out accident, has had a strong impact on the continuity of peritectic steel product quality and production.At present, most peritectic steel manufacturing enterprises adopt
Roller pressure is driven with adjustment casting speed, adjustment caster two cold with water system, adjustment or adjust crystallizer protecting residue composition
Solve the problems, such as that liquid level fluctuation of crystallizer is excessive Deng measure, but adjustment medium thin slab is relied solely in actual production process
The method of conticaster technological parameter can not completely avoid liquid level fluctuation of crystallizer excessive and give the life of peritectic steel high-volume normal table
The impact that product is caused.
Therefore, how to reduce liquid level fluctuation of crystallizer amplitude, reduce inclusion content in melting steel content, improve castability, realize
Medium and thin slab continuous caster high-volume normal table production peritectic steel is the technical problem of current those skilled in the art's urgent need to resolve.
The content of the invention
In view of this, it is an object of the invention to provide a kind of method of medium and thin slab continuous caster production peritectic steel, this method
Liquid level fluctuation of crystallizer amplitude can be reduced, inclusion content in melting steel content is reduced, castability is improved, medium and thin slab continuous caster is realized
High-volume normal table produces peritectic steel, it is ensured that peritectic steel product quality and the continuity of production.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：
A kind of method that medium and thin slab continuous caster produces peritectic steel, comprises the following steps：
1) pneumatic steelmaking：Molten iron is added into blowing steel-making output molten steel in converter, charging is started during converter tapping 1/3, turned
Stove tapping 3/4 when complete charging, addition sequence be lime, fluorite, silicomangan, aluminium alloy, control finishing slag basicity be 2.8～
3.5, the percentage by weight of composition is in blowing end point molten steel：[C]：0.06%～0.10%, [S]：0～0.020%, [P]：0
～0.015%；
2) LF stoves external refining：By step 1) gained molten steel carry out LF stove external refinings, after desulfating and deoxidation add ferromanganese, silicon
Ferromanganese and ferrotianium, outbound front soft blow argon, argon blowing time is no less than 8min, and the percentage by weight for controlling composition in outbound molten steel is：
[C]：0.12%～0.14%, [Si]：0.10%～0.20%, [Mn]：0.20%～0.40%, [S]：0～0.015%,
[P]：0～0.020%, Alt：0.010%～0.030%；
3) medium and thin slab continuous caster continuous casting：By step 2) gained molten steel utilize medium and thin slab continuous caster continuous casting output peritectoid
Steel, covering slag is added in crystallizer, and the percentage by weight for protecting slag ingredient is：CaO：25%～45%, SiO2：20%～
40%, MgO：0.5%～3.0%, Al2O3：1.2%～8.2%；Na2O：7%～17%；F：6%～14%, C：1.5%～
9.5%, H2O：0～0.5%, R：1.0%～1.4%, remaining is impurity；Water management green shell is matched somebody with somebody not using alloy peritectoid weak cold
Homoepitaxial；Gained peritectoid composition of steel percentage by weight be：[C]：0.12%～0.14%, [Si]：0.10%～0.20%,
[Mn]：0.20%～0.40%, [S]：0～0.015%, [P]：0～0.020%, Alt：0.010%～0.030%.
Preferably, the step 1) in converter tapping when using the double Slag Retaining Process of floating plug and scum rod, control ladle slag
Thickness degree is less than 50mm.
Preferably, the step 1) in blowing end point liquid steel temperature be 1640 DEG C～1660 DEG C.
Preferably, the step 2) according to primary sample composition add lime, fluorite, slag making desulfurization, Argon stirring.
Preferably, the step 2) according to secondary sample composition add aluminium block carry out deep deoxidation.
Preferably, the step 2) the outbound liquid steel temperature of process control be 1575 DEG C～1585 DEG C
Preferably, the step 3) in, crystallizer width face discharge 270L/min～290L/min, leptoprosopy discharge 18L/
Min～21L/min, the wide face turnover water temperature difference of crystallizer is 10 DEG C～12 DEG C, and leptoprosopy out temperature is 7 DEG C～9 DEG C.
Preferably, the step 3) in, protection slag melting point is 1085 DEG C～1185 DEG C, and viscosity is that 0.5 pool～1.5 is moored, plate
Between argon flow amount control in 3NL/min～6NL/min, the insertion depth 110mm～160mm of submersed nozzle.
Preferably, the step 3) in control the Metal in Tundish degree of superheat be 15 DEG C～30 DEG C, casting speed 3.0t/min
～3.7t/min,
Preferably, the step 3) in, using molding casting, open and pour front 10min to middle bag stopper hole and by blowing in steel hole
Argon gas；Big bag is opened using the big stream of low level and poured, and adds coverture to prevent molten steel exposed in atmosphere；Open after pouring between middle wrapper sheet,
Stopper, filling pipe end, protection sleeve pipe at Argon gas shielded, it is ensured that in Metal in Tundish the percentage by weight of T [O] be 0～
0.0035%, the percentage by weight of [N] is 0～0.0050%.
Compared with prior art, the invention provides a kind of medium and thin slab continuous caster method for producing peritectic steel, including step
Suddenly：Pneumatic steelmaking, LF stove external refinings, medium and thin slab continuous caster continuous casting.The present invention by pneumatic steelmaking-LF refining-in
The rectification process control of thin-slab caster continuous casting so that liquid level fluctuation of crystallizer amplitude is controlled within ± 3mm, it is to avoid crystallization
Device liquid fluctuating is excessive to produce the impact that peritectic steel is caused to medium and thin slab continuous caster high-volume normal table；Further, lead to
Crossing the deoxidation alloying of control steelmaking process makes steel inclusion be mainly the strong spessartine of low melting point and plasticity, in refining
During reduce the secondary oxidation of molten steel, and appropriate design argon gas system guarantees that field trash farthest floats, and does during continuous casting
Good molding casting, reduces secondary oxidation of steel, so as to change the property of inclusion content in melting steel, improves castability, is continuous casting
Offer is mingled with the suitable molten steel of species and content, realizes medium and thin slab continuous caster high-volume normal table production peritectic steel.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention to this
It is bright to be clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
The invention provides a kind of method that medium and thin slab continuous caster produces peritectic steel, comprises the following steps：
1) pneumatic steelmaking：Molten iron is added into blowing steel-making output molten steel in converter, charging is started during converter tapping 1/3, turned
Stove tapping 3/4 when complete charging, addition sequence be lime, fluorite, silicomangan, aluminium alloy, control finishing slag basicity be 2.8～
3.5, the percentage by weight of composition is in blowing end point molten steel：[C]：0.06%～0.10%, [S]：0～0.020%, [P]：0
～0.015%；
2) LF stoves external refining：By step 1) gained molten steel carry out LF stove external refinings, after desulfating and deoxidation add ferromanganese, silicon
Ferromanganese and ferrotianium, outbound front soft blow argon, argon blowing time is no less than 8min, and the percentage by weight for controlling composition in outbound molten steel is：
[C]：0.12%～0.14%, [Si]：0.10%～0.20%, [Mn]：0.20%～0.40%, [S]：0～0.015%,
[P]：0～0.020%, Alt：0.010%～0.030%；
3) medium and thin slab continuous caster continuous casting：By step 2) gained molten steel utilize medium and thin slab continuous caster continuous casting output peritectoid
Steel, covering slag is added in crystallizer, and the percentage by weight for protecting slag ingredient is：CaO：25%～45%, SiO2：20%～
40%, MgO：0.5%～3.0%, Al2O3：1.2%～8.2%；Na2O：7%～17%；F：6%～14%, C：1.5%～
9.5%, H2O：0～0.5%, R：1.0%～1.4%, remaining is impurity；Water management green shell is matched somebody with somebody not using alloy peritectoid weak cold
Homoepitaxial；Gained peritectoid composition of steel percentage by weight be：[C]：0.12%～0.14%, [Si]：0.10%～0.20%,
[Mn]：0.20%～0.40%, [S]：0～0.015%, [P]：0～0.020%, Alt：0.010%～0.030%.
The invention provides a kind of method that medium and thin slab continuous caster produces peritectic steel, including step：Pneumatic steelmaking, LF stoves
External refining, medium and thin slab continuous caster continuous casting.The present invention is by pneumatic steelmaking-LF refining-medium and thin slab continuous caster continuous casting
Rectification process control so that liquid level fluctuation of crystallizer amplitude is controlled within ± 3mm, it is to avoid liquid level fluctuation of crystallizer is excessive to be given
The impact that medium and thin slab continuous caster high-volume normal table production peritectic steel is caused；Further, by controlling steelmaking process
Deoxidation alloying makes steel inclusion be mainly the strong spessartine of low melting point and plasticity, and molten steel is reduced in refining process
Secondary oxidation, and appropriate design argon gas system guarantees that field trash farthest floats, and molding casting is carried out during continuous casting, reduces steel
Water secondary oxidation, so as to change the property of inclusion content in melting steel, improves castability, provides for continuous casting and is mingled with species and contains
The suitable molten steel of amount, realizes medium and thin slab continuous caster high-volume normal table production peritectic steel.
During converter tapping, in order to reduce the quantity of slag for flowing into ladle, using floating plug and the double Slag Retaining Process of scum rod, steel is controlled
Bag thickness of slag layer is preferably less than 50mm, after slag making and pushing off the slag, blowing end point liquid steel temperature be preferably controlled to 1640 DEG C～
1660℃。
Into LF stove external refinings, ladle opens bottom blowing after arriving at a station, and ensures argon flow amount in 200NL/min according to slugging situation
Left and right；Ladle add slag former to carry out slag making desulfurization according to primary sample composition behind position to processing, slag former be preferably lime and
Fluorite.According to secondary sample composition, being preferably added to aluminium block carries out deep deoxidation, adds alloying element according to three sub-sampling compositions later
Then ferromanganese, fero-manganesesilicon, ferrotianium opens argon bottom-blowing stirring, it is to be heated to finishing temperature when reduce argon flow amount, adjustment chemistry
Composition (percentage by weight) is extremely：[C]：0.12%～0.14%, [Si]：0.10%～0.20%, [Mn]：0.20%～
0.40%, [S]：0～0.015%, [P]：0～0.020%, Alt：0.010%～0.030%, when outbound, liquid steel temperature is preferred
1575 DEG C～1585 DEG C are controlled to, the outbound front argon bottom-blowing that controls is soft blow argon pattern, and soft argon blowing time is preferably greater than 8min.
Then, molten steel enters continuous casting working procedure, in order to realize that medium and thin slab continuous caster high-volume normal table produces peritectic steel
Preferably, it is preferred that crystallizer width face discharge 270NL/min～290NL/min, leptoprosopy discharge 18NL/min～21NL/
Min, the wide face turnover water temperature difference of crystallizer is 10 DEG C～12 DEG C, and leptoprosopy out temperature is 7 DEG C～9 DEG C.Add toward in crystallizer
Peritectic steel mould flux, it is preferred that protection slag melting point for protection slag melting point be 1085 DEG C～1185 DEG C, viscosity be 0.5 pool～
1.5 pool.3NL/min～6NL/min, submersed nozzle are preferably controlled in for argon flow amount between the thawing speed plate for controlling covering slag
Insertion depth be preferably 110mm～160mm.
Should be noted in casting process and carry out molding casting.Open and pour front 10min to middle bag stopper hole and by Argon in steel hole, to the greatest extent
In possible exclusion tundish in baking process remaining weak oxide atmosphere, what reduction opened that molten steel oxidation when pouring produces is mingled with；Greatly
Bag is opened using the big stream of low level and poured, and adds coverture to prevent molten steel exposed in atmosphere；Open after pouring between middle wrapper sheet, stopper, on
Argon gas shielded at the mouth of a river, protection sleeve pipe, prevents between plate, big bag collector nozzle etc. forms negative pressure suction air, and then aoxidizes molten steel,
Ensure T [the O]≤35ppm, [N]≤50ppm in steel.
For a further understanding of the present invention, a kind of medium and thin slab continuous caster life provided the present invention with reference to embodiment
The method for producing peritectic steel is described in detail.
Embodiment 1：
137t molten iron is sent into into the blowing of 120t oxygen top-blown converters, 1/ in the converter tapping process after terminating is bessemerized
Start charging when 3, add when 3/4, addition sequence is lime, fluorite, silicomangan, aluminium alloy；Wherein lime 680kg, fluorite
170kg, adds a small amount of silicomangan, aluminium alloy to reduce the oxidisability of slag.Using floating plug, the double pushing off the slag works of scum rod during tapping
Skill, ladle thickness of slag layer 30mm.Finishing slag basicity is controlled after slag making and pushing off the slag 3.0, terminal composition (percentage by weight) is controlled
System is at [C]：0.08%, [S]：0.020%, [P]：0.01%, 1658 DEG C of outlet temperature.
Then molten steel is entered into LF refining operation, ladle opens bottom blowing after arriving at a station, ensures that argon flow amount exists according to slugging situation
200NL/min or so；To processing according to primary sample composition addition lime 600kg behind position, fluorite 200kg carries out desulfurization to ladle,
Argon is stirred, and control argon flow amount is in 80NL/min or so；Aluminium block 80kg is added to carry out deep deoxidation according to secondary sample composition；So
Afterwards alloying element ferromanganese 360kg, fero-manganesesilicon 200kg, ferrotianium 100kg are added according to three sub-sampling compositions, then by argon flow amount
Open to 500NL/min, it is to be heated to argon flow amount is adjusted during finishing temperature in 80NL/min, adjust chemical composition (weight percent
Than) extremely：[C]：0.13%, [Si]：0.15%, [Mn]：0.38%, [S]：0.005%, [P]：0.010%, Alt：0.015%；
1580 DEG C of out-station temperature, outbound front soft blow argon ensures 9min；
Then molten steel enters continuous casting working procedure, using straight arc medium and thin slab continuous caster (section 135mm × (900～
1600mm)), dynamic secondary cooling is using inhomogeneous growth of the alloy peritectoid weak cold with water management green shell.135 × 1030 sectional boards of production
Billet crystallizer width face discharge 290L/min, leptoprosopy discharge 21L/min, crystallizer turnover water temperature difference：10 DEG C of wide face, leptoprosopy 8
℃。
The use of covering slag is peritectic steel mould flux, chemical composition (percentage by weight) is：CaO：30.1%, SiO2:
37.1%, MgO：1.7%, Al2O3：4.5%；Na2O:9.2%；F：10.6%, C：5.4%, H2O：0.31%, remaining is miscellaneous
Matter.Protection slag melting point is 1090 DEG C, and viscosity 1.3 is moored.To control the thawing speed of covering slag, argon flow amount is controlled in 4NL/ between plate
Min, the insertion depth 130mm of submersed nozzle.
Additionally, continuous casting working procedure should be noted carries out molding casting.Open and pour front 10min to middle bag stopper hole and by blowing in steel hole
Argon, excludes as far as possible the weak oxide atmosphere of remaining in baking process in tundish, and the folder that molten steel oxidation is produced when pouring is driven in reduction
It is miscellaneous；Big bag is opened using the big stream of low level and poured, and adds coverture to prevent molten steel exposed in atmosphere；Open after pouring between middle wrapper sheet, plug
Argon gas shielded at rod, filling pipe end, protection sleeve pipe, prevents between plate, big bag collector nozzle etc. forms negative pressure suction air, and then aoxidizes
Molten steel, it is ensured that the percentage by weight of T [O] is 0～0.0035% in Metal in Tundish, the percentage by weight of [N] is 0～
0.0050%.
Under higher casting speed (more than 1.8m/min), quality is up to state standards the peritectic steel of output, casting billet surface
Without defects such as slag inclusion, pit, lobes, there is no bleed-out accident in casting process.
Embodiment 2：
132t molten iron is sent into into the blowing of 120t oxygen top-blown converters, 1/ in the converter tapping process after terminating is bessemerized
Start charging when 3, add when 3/4, addition sequence is lime, fluorite, silicomangan, aluminium alloy；Wherein lime 650kg, fluorite
160kg, adds a small amount of silicomangan, aluminium alloy to reduce the oxidisability of slag.Using floating plug, the double pushing off the slag works of scum rod during tapping
Skill, ladle thickness of slag layer 25mm.Finishing slag basicity is controlled after slag making and pushing off the slag 2.9, terminal composition (percentage by weight) is controlled
System is at [C]：0.085%, [S]：0.020%, [P]：0.01%, 1665 DEG C of outlet temperature.
Then molten steel is entered into LF refining operation, ladle opens bottom blowing after arriving at a station, ensures that argon flow amount exists according to slugging situation
200NL/min or so；Ladle adds slag former to carry out desulfurization (lime 600kg, fluorite to process position according to primary sample composition
200kg), Argon stirring, control flow is in 80NL/min or so；Aluminium block 80kg is added to carry out deep deoxidation according to secondary sample composition
Later alloying element ferromanganese 360kg, fero-manganesesilicon 200kg, ferrotianium 100kg are added according to three sub-sampling compositions, then by argon gas stream
Amount is opened to 500NL/min, to be heated to argon flow amount is adjusted during finishing temperature in 80NL/min, adjusts chemical composition (weight hundred
Divide ratio) extremely：[C]：0.13%, [Si]：0.15%, [Mn]：0.38%, [S]：0.005%, [P]：0.010%,
Alt0.015%；1580 DEG C of out-station temperature, outbound front soft blow argon ensures 9min；
Then molten steel enters continuous casting working procedure, using straight arc medium and thin slab continuous caster (section 135mm × (900～
1600mm)), dynamic secondary cooling is using inhomogeneous growth of the alloy peritectoid weak cold with water management green shell.135 × 1030 sectional boards of production
Billet crystallizer width face discharge 290L/min, leptoprosopy discharge 21L/min, crystallizer turnover water temperature difference：10 DEG C of wide face, leptoprosopy 8
℃。
The use of covering slag is peritectic steel mould flux, chemical composition (percentage by weight) is：CaO：30.41%, SiO2:
37.04%, MgO：1.79%, Al2O3：4.33%；Na2O:9.48%；F：10.25%, C：5.49%, H2O：0.23%, remaining
For impurity.Protection slag melting point is 1083 DEG C, and viscosity 1.32 is moored.To control the thawing speed of covering slag, argon flow amount control between plate
In 5NL/min, the insertion depth 130mm of submersed nozzle.
Additionally, continuous casting working procedure should be noted carries out molding casting.Open and pour front 10min to middle bag stopper hole and by blowing in steel hole
Argon, excludes as far as possible the weak oxide atmosphere of remaining in baking process in tundish, and the folder that molten steel oxidation is produced when pouring is driven in reduction
It is miscellaneous；Big bag is opened using the big stream of low level and poured, and adds coverture to prevent molten steel exposed in atmosphere；Open after pouring between middle wrapper sheet, plug
Argon gas shielded at rod, filling pipe end, protection sleeve pipe, prevents between plate, big bag collector nozzle etc. forms negative pressure suction air, and then aoxidizes
Molten steel, it is ensured that the percentage by weight of T [O] is 0～0.0035% in Metal in Tundish, the percentage by weight of [N] is 0～
0.0050%.
Under higher casting speed (more than 1.8m/min), quality is up to state standards the peritectic steel of output, casting billet surface
Without defects such as slag inclusion, pit, lobes, there is no bleed-out accident in casting process.
A kind of method of medium and thin slab continuous caster production peritectic steel provided by the present invention is described in detail above.
Specific embodiment used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is
It is used to help understand the method for the present invention and its core concept.It should be pointed out that for those skilled in the art come
Say, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these improve and modify
Also fall in the protection domain of the claims in the present invention.
Claims (1)
1. a kind of method that medium and thin slab continuous caster produces peritectic steel, it is characterised in that comprise the following steps：
1) pneumatic steelmaking：Molten iron is added into blowing steel-making output molten steel in converter, charging is started during converter tapping 1/3, converter goes out
Charging is completed during steel 3/4, addition sequence is lime, fluorite, silicomangan, aluminium alloy, it is 2.8～3.5 to control finishing slag basicity, is blown
The percentage by weight of composition is in refining endpoint molten steel：[C]：0.06%～0.10%, [S]：0～0.020%, [P]：0～
0.015%；
The step 1) in converter tapping when be less than using the double Slag Retaining Process of floating plug and scum rod, control ladle thickness of slag layer
50mm；
The step 1) in blowing end point liquid steel temperature be 1640 DEG C～1660 DEG C；
2) LF stoves external refining：By step 1) gained molten steel carry out LF stove external refinings, after desulfating and deoxidation add ferromanganese, fero-manganesesilicon
And ferrotianium, outbound front soft blow argon, argon blowing time is no less than 8min, and the percentage by weight for controlling composition in outbound molten steel is：[C]：
0.12%～0.14%, [Si]：0.10%～0.20%, [Mn]：0.20%～0.40%, [S]：0～0.015%, [P]：0～
0.020%, Alt：0.010%～0.030%, remaining is Fe and inevitable impurity；
The step 2) according to primary sample composition add lime, fluorite, slag making desulfurization, Argon stirring；
The step 2) according to secondary sample composition add aluminium block carry out deep deoxidation；
The step 2) the outbound liquid steel temperature of process control be 1575 DEG C～1585 DEG C；
3) medium and thin slab continuous caster continuous casting：By step 2) gained molten steel utilize medium and thin slab continuous caster continuous casting output peritectic steel, to
Add covering slag in crystallizer, the percentage by weight for protecting slag ingredient is：CaO：25%～45%, SiO2：20%～40%,
MgO：0.5%～3.0%, Al2O3：1.2%～8.2%；Na2O：7%～17%；F：6%～14%, C：1.5%～9.5%,
H2O：0～0.5%, R：1.0～1.4, remaining is impurity；Using inhomogeneous growth of the alloy peritectoid weak cold with water management green shell；
Gained peritectoid composition of steel percentage by weight be：[C]：0.12%～0.14%, [Si]：0.10%～0.20%, [Mn]：
0.20%～0.40%, [S]：0～0.015%, [P]：0～0.020%, Alt：0.010%～0.030%, remaining be Fe with
And inevitable impurity；
The step 3) in, crystallizer width face discharge 270L/min～290L/min, leptoprosopy discharge 18L/min～21L/
Min, the wide face turnover water temperature difference of crystallizer is 10 DEG C～12 DEG C, and leptoprosopy out temperature is 7 DEG C～9 DEG C；
The step 3) in, protection slag melting point is 1085 DEG C～1185 DEG C, and viscosity is that 0.5 pool～1.5 is moored, argon flow amount control between plate
System is in 3NL/min～6NL/min, the insertion depth 110mm～160mm of submersed nozzle；
The step 3) in control the Metal in Tundish degree of superheat for 15 DEG C～30 DEG C, casting speed is 3.0t/min～3.7t/
min；
The step 3) in, using molding casting, open and pour front 10min to middle bag stopper hole and by blowing argon gas in steel hole；Big bag is adopted
Opened with the big stream of low level and poured, add coverture to prevent molten steel exposed in atmosphere；Open after pouring between middle wrapper sheet, stopper, filling pipe end,
Argon gas shielded at protection sleeve pipe, it is ensured that the percentage by weight of T [O] is 0～0.0035% in Metal in Tundish, the weight of [N]
Percentage is 0～0.0050%.
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| CN106011639B (en) * | 2016-05-23 | 2018-01-16 | 唐山钢铁集团有限责任公司 | A kind of method of conventional plate blank conticaster production low-alloy peritectic steel |
| CN107385341A (en) * | 2017-08-02 | 2017-11-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of welding rod steel and its manufacturing process |
| CN108330389B (en) * | 2018-01-31 | 2020-03-20 | 日照钢铁控股集团有限公司 | Production process of calcium-treatment-free calm clean steel |
| CN108823492B (en) * | 2018-06-15 | 2020-07-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for producing high-alloy high-strength peritectic steel by CSP (cast steel plate) thin plate continuous casting machine |
| CN109913755B (en) * | 2019-03-22 | 2020-09-18 | 山东钢铁股份有限公司 | Peritectic steel and preparation method thereof |
| CN111519081A (en) * | 2020-04-17 | 2020-08-11 | 南京钢铁股份有限公司 | Production method of low-sulfur peritectic steel continuous casting round billet |
| CN112828254A (en) * | 2020-12-30 | 2021-05-25 | 芜湖新兴铸管有限责任公司 | Method for controlling liquid level fluctuation of peritectic steel continuous casting crystallizer |
| CN113084113B (en) * | 2021-03-08 | 2022-06-14 | 山东钢铁股份有限公司 | Different steel type mixed casting method suitable for slab caster |
| CN113198995A (en) * | 2021-04-25 | 2021-08-03 | 芜湖新兴铸管有限责任公司 | Peritectic steel continuous casting billet depression improvement control method |
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| JP4466335B2 (en) * | 2003-11-10 | 2010-05-26 | Ｊｆｅスチール株式会社 | Steel continuous casting method |
| CN101586205B (en) * | 2008-05-22 | 2012-06-13 | 鞍钢股份有限公司 | Method for producing low-alloy peritectic steel by medium-thickness slab caster |
| CN102888490B (en) * | 2012-10-24 | 2014-01-22 | 武汉钢铁(集团)公司 | Method for weak dephosphorization of peritectic steel in argon station |
| JP5708690B2 (en) * | 2013-03-22 | 2015-04-30 | 新日鐵住金株式会社 | Mold flux for continuous casting of steel |
| CN103639382B (en) * | 2013-11-28 | 2016-08-17 | 广东韶钢松山股份有限公司 | A kind of peritectic steel sheet billet continuous casting crystallizer protecting residue and formula thereof |
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