CN105108132B - A kind of anti-nitrogen pick-up long nozzle of continuous casting production - Google Patents
A kind of anti-nitrogen pick-up long nozzle of continuous casting production Download PDFInfo
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- CN105108132B CN105108132B CN201510544048.3A CN201510544048A CN105108132B CN 105108132 B CN105108132 B CN 105108132B CN 201510544048 A CN201510544048 A CN 201510544048A CN 105108132 B CN105108132 B CN 105108132B
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- long nozzle
- argon gas
- continuous casting
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Abstract
The present invention relates to technical field of ferrous metallurgy, more particularly to a kind of anti-nitrogen pick-up long nozzle of continuous casting production.The anti-nitrogen pick-up long nozzle of the continuous casting production includes long nozzle body, air permeable belt, outer box hat, argon gas incoming end and hollow ceramic pipe, outer box hat is sheathed on the outside of long nozzle body, air permeable belt is arranged on long nozzle device, argon gas incoming end is arranged on outer box hat, one end of hollow ceramic pipe is arranged in outer box hat and connected with argon gas incoming end, and the other end is arranged in air permeable belt.The present invention is by provided with air permeable belt and hollow ceramic pipe, improve the sealing property of long nozzle body, argon gas incoming end is directly connected with hollow ceramic pipe, so that the argon gas being blown into is directly entered air permeable belt, and in the uniform wide air curtain of bowl portion inwall formation ring-type of long nozzle body, it is ensured that effectively completely cut off air in steel pouring process, it is therefore prevented that molten steel nitrogen pick-up, the degree of purity of molten steel is improved, and then ensure that the high-quality of continuous casting billet.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, more particularly to a kind of anti-nitrogen pick-up long nozzle of continuous casting production.
Background technology
At this stage, steel industry dog-eat-dog, survival pressure is big, and major steel mill is to molten steel pollution and the control of continuous casting billet quality
System is more harsh, and the molten steel of high cleanliness and high-quality strand are exactly the basic of steel mill's existence, as the terminal process of steel-making,
The importance of continuous casting is self-evident.In continuous casting, molten steel by ladle when flowing through tundish, if not taking protective casting skill
Art measure, molten steel just inevitably with air contact, produce secondary oxidation reaction, add the nitrogen content in molten steel, reduce
The degree of purity of steel.Therefore, the quality of molten steel and continuous casting billet turns into the steel-making work most important thing in strict control casting process.
At present, the long nozzle body that domestic steel mill generally uses is air flue type sealing structure, and preparation method is in long nozzle
A number of wide groove of Denging is made on the top of body, and in the outer cover upper iron shell of long nozzle.It is blown into by external metallization flexible pipe
Argon gas by gap between iron-clad and long nozzle base substrate, form air curtain to completely cut off air on long nozzle top, so as to play
Protect the effect of Molten Steel Cleanliness.As shown in Figure 2 to Figure 3, this air flue type sealing long nozzle it is main by air flue 8, outer box hat 3,
Argon gas incoming end 4, fire clay 9 and ventilative gap 7 are constituted.Ventilative gap 7 and air flue 8 are the main works that air flue type seals long nozzle
Make position, although these positions have certain gas permeability, but ventilative position is on the top of long nozzle, it is impossible to ensure isolation completely
Air.Meanwhile, the fire clay 9 between outer box hat 3 and long nozzle base substrate is by manually filling, it is possible to fire clay 9 occur
Leakiness gas leakage is filled, or fire clay 9 fills the ventilative gap of excessive blocking, it is impossible to ensure gas permeability.Thus, current air flue
The gas permeability of formula sealing long nozzle is very unstable, can not meet the production requirement of current steel mill.
Therefore, not enough for more than, the invention provides a kind of anti-nitrogen pick-up long nozzle of continuous casting production.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention be solve existing argon blowing long nozzle ventilative gap and air flue be located at long water
The top of mouth, it is impossible to ensure to completely cut off air completely；The fire clay quality manually filled simultaneously is difficult to control, and causes existing length
The ventilative stability at the mouth of a river is poor, and the degree of purity of molten steel is low, it is impossible to the problem of meeting the production requirement of current steel mill.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of anti-nitrogen pick-up long nozzle of continuous casting production, in the continuous casting
Between wrap anti-nitrogen pick-up long nozzle including long nozzle body, air permeable belt, outer box hat, argon gas incoming end and hollow ceramic pipe, the outer steel
Valve jacket is located at the outside of the long nozzle body, and the air permeable belt is arranged on the long nozzle device, the argon gas incoming end
It is arranged on the outer box hat, one end of the hollow ceramic pipe is arranged in the outer box hat and connected with the argon gas incoming end,
The other end is arranged in the air permeable belt.
Wherein, the axis of the air permeable belt and the argon gas incoming end is set in α angles.
Wherein, the scope of the inclination alpha is 0 ° to 30 °.
Wherein, the width of the air permeable belt is 3cm between 5cm.
Wherein, the diameter of the hollow ceramic pipe in 5mm between 15mm.
Wherein, fire clay is filled between the long nozzle body and outer box hat.
Wherein, the material of the air permeable belt is carbon containing inorganic non-metal composite material, and the carbon containing inorganic non-metallic is combined
Material is fused white corundum, crystalline flake graphite and silica.
Wherein, fused white corundum ＞ 50%, crystalline flake graphite ＞ 22%, dioxy in the carbon containing inorganic non-metal composite material
SiClx ＞ 5%.
Wherein, the argon gas incoming end is metal hose.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that：In the anti-nitrogen pick-up long nozzle of continuous casting production that the present invention is provided
Outer box hat is sheathed on the outside of long nozzle body, and air permeable belt is arranged on long nozzle device, and argon gas incoming end is arranged at outer box hat
On, one end of hollow ceramic pipe is arranged in outer box hat and connected with argon gas incoming end, and the other end is arranged in air permeable belt.The present invention is carried
The anti-nitrogen pick-up long nozzle of continuous casting production of confession is by provided with air permeable belt and hollow ceramic pipe, improving the sealing of long nozzle body
Can, argon gas incoming end is directly connected with hollow ceramic pipe so that the argon gas being blown into is directly entered air permeable belt, and in long nozzle body
The uniform wide air curtain of bowl portion inwall formation ring-type, it is ensured that effectively completely cut off air in steel pouring process, it is therefore prevented that molten steel increasing
Nitrogen, improves the degree of purity of molten steel, and then ensure that the high-quality of continuous casting billet.
Brief description of the drawings
Fig. 1 is the structural representation of the anti-nitrogen pick-up long nozzle of continuous casting production of the embodiment of the present invention；
Fig. 2 is the structural representation that existing air flue type seals long nozzle；
The close-up schematic view that Fig. 3 is E in Fig. 2.
In figure：1：Long nozzle body；2：Air permeable belt；3：Outer box hat；4：Argon gas incoming end；5：Hollow ceramic pipe；7：It is ventilative
Gap；8：Air flue；9：Fire clay.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in figure 1, the anti-nitrogen pick-up long nozzle of a kind of continuous casting production provided in an embodiment of the present invention, continuous casting production is anti-to be increased
Nitrogen long nozzle includes long nozzle body 1, air permeable belt 2, outer box hat 3, argon gas incoming end 4 and hollow ceramic pipe 5, and outer box hat 3 is arranged
In the outside of long nozzle body 1, air permeable belt 2 is arranged on long nozzle device 1, i.e., air permeable belt 2 is set around the top of long nozzle body 1
Conical surface flex point at, refer at the conical surface flex point in the bowl portion of long nozzle body 1, and close proximity to the top of long nozzle body 1
Portion so that argon gas is tried one's best to shed upwards, is conducive to completely cutting off air, argon gas incoming end 4 is arranged on outer box hat 3, hollow ceramic pipe 5
One end be arranged in outer box hat 3 and connected with argon gas incoming end 4, the other end is arranged in air permeable belt 2.
Argon gas incoming end 4 is directly connected to hollow ceramic pipe, and argon gas can be made to require no fire clay 9 and be directly entered
Gas band 2, prevents gas from being overflowed from the gap of fire clay 9, leak air phenomenon, filled with special carbon containing inorganic in air permeable belt 2
Nonmetallic materials so that argon gas fully enters the bowl portion of long nozzle body 1 by air permeable belt.
The axis of air permeable belt 2 and argon gas incoming end 4 arranges in horizontal direction in the setting of α angles, argon gas incoming end 4, can be with
Ensure that the air curtain of the bowl portion inwall of long nozzle body 1 is moved upwards under the effect of follow-up argon pressure, will not be under steel flow direction
Into tundish, Molten Steel Cleanliness is further ensured that.
To reach that the scope of the inclination alpha in the effect of preferably isolation air, the present embodiment is 0 ° to 30 ° so that argon gas
It is continual to shed upwards, to form air curtain.
Preferably, the width of air permeable belt 2 is that 3cm is 3cm to 5cm to width between 5cm, that is, is formd in the present embodiment
Between the uniform air curtain of annular.
In order to reach more preferable gas permeability, hollow ceramic pipe 5 is arranged horizontally in air permeable belt 2, and hollow ceramic pipe 5 is straight
Footpath, between 15mm, directly enters hollow ceramic pipe 5, it is ensured that go out so in argon gas course of conveying in 5mm from argon gas incoming end 4
The argon gas entered fully enters air permeable belt 2, it is to avoid directly contacted with fire clay 9, prevents the phenomenons such as ventilative gas leakage.
Fire clay 9 is provided between long nozzle body 1 and outer box hat 3, the plasticity of fire clay 9 is good, adhesion strength is big, energy against corrosion
Power is strong, refractoriness is higher, can effectively realize the close connection of long nozzle body 1 and outer box hat 3.
The material of air permeable belt 2 be carbon containing inorganic non-metal composite material, it is preferred that selection gas permeable material apparent porosity be
Between 18%~25%, the raw material of carbon containing inorganic non-metal composite material is fused white corundum, crystalline flake graphite and silica.
In order to reach more preferable air permeable effect, the raw material proportioning of carbon containing inorganic non-metal composite material is：Fused white corundum
＞ 50%, crystalline flake graphite ＞ 22%, silica ＞ 5%.
Argon gas incoming end 4 is metal hose, and corrosion resistance, the heat-resisting quantity of metal hose are good and lightweight, do not block, and have
Beneficial to the continual and steady input of argon gas.
A kind of specific work process of the anti-nitrogen pick-up long nozzle of continuous casting production of the present invention is：The anti-nitrogen pick-up of continuous casting production is long
The mouth of a river adds special gas permeable material, and pre-buried hollow ceramic pipe 5 in the horizontal direction in air permeable belt 2, by drying in shaping
Burn till；Used argon gas incoming end 4 continuously inputs argon gas, and argon gas by argon gas incoming end 4 directly by entering to hollow pottery
Porcelain tube 5, is treating that 2 enter long nozzle body 1, because air permeable belt 2 and horizontal direction have positive pitch α, argon gas air curtain by ventilative
Endlessly discharge upwards, will not be downwardly into molten steel, and one layer of ring-type of inwall formation in 1 bowl of portion of long nozzle body is uniform
Wide air curtain, has effectively completely cut off air, and prevent the phenomenon for occurring molten steel nitrogen pick-up in steel pouring process.
In summary, the anti-nitrogen pick-up long nozzle China and foreign countries box hat of continuous casting production that the present invention is provided is sheathed on long nozzle body
Outside, air permeable belt is arranged on long nozzle device, and argon gas incoming end is arranged on outer box hat, and one end of hollow ceramic pipe is arranged in
Outer box hat is connected with argon gas incoming end, and the other end is arranged in air permeable belt.The long water of the anti-nitrogen pick-up of continuous casting production that the present invention is provided
Mouthful by provided with air permeable belt and hollow ceramic pipe, improving the sealing property of long nozzle body, argon gas incoming end directly with it is hollow
Earthenware is connected so that the argon gas being blown into is directly entered air permeable belt, and uniform in the bowl portion inwall formation ring-type of long nozzle body
Wide air curtain, it is ensured that effectively completely cut off air in steel pouring process, it is therefore prevented that molten steel nitrogen pick-up, improved the degree of purity of molten steel,
And then ensure that the high-quality of continuous casting billet.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of anti-nitrogen pick-up long nozzle of continuous casting production, it is characterised in that：Including long nozzle body (1), air permeable belt (2), outer steel
Shell (3), argon gas incoming end (4) and hollow ceramic pipe (5), the outer box hat (3) are sheathed on the outer of the long nozzle body (1)
Side, the air permeable belt (2) is arranged on the long nozzle body (1), and the air permeable belt (2) is set around the long nozzle body
(1) at the conical surface flex point above, wherein, refer at the conical surface flex point in the bowl portion of the long nozzle body (1), and lean on as far as possible
The top of the nearly long nozzle body (1)；The argon gas incoming end (4) is arranged on the outer box hat (3), the hollow ceramic
One end of pipe (5) is arranged in the outer box hat (3) and connected with the argon gas incoming end (4), and the other end is arranged at the air permeable belt
(2) in；The axis of air permeable belt (2) and argon gas incoming end (4) is set in α angles, and argon gas incoming end (4) is arranged in horizontal direction.
2. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The scope of the inclination alpha is
0 ° to 30 °.
3. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The width of the air permeable belt (2)
Spend is 3cm between 5cm.
4. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The hollow ceramic pipe (5)
Diameter in 5mm between 15mm.
5. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The long nozzle body (1)
Fire clay (9) is filled between outer box hat (3).
6. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The material of the air permeable belt (2)
Matter be carbon containing inorganic non-metal composite material, the carbon containing inorganic non-metal composite material be fused white corundum, crystalline flake graphite and
Silica.
7. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 6, it is characterised in that：The carbon containing inorganic non-metallic
Fused white corundum ＞ 50% in composite, crystalline flake graphite ＞ 22%, silica ＞ 5%.
8. the anti-nitrogen pick-up long nozzle of continuous casting production according to claim 1, it is characterised in that：The argon gas incoming end (4)
For metal hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510544048.3A CN105108132B (en) | 2015-08-28 | 2015-08-28 | A kind of anti-nitrogen pick-up long nozzle of continuous casting production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510544048.3A CN105108132B (en) | 2015-08-28 | 2015-08-28 | A kind of anti-nitrogen pick-up long nozzle of continuous casting production |
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| Publication Number | Publication Date |
|---|---|
| CN105108132A CN105108132A (en) | 2015-12-02 |
| CN105108132B true CN105108132B (en) | 2017-10-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216653B (en) * | 2016-09-26 | 2019-01-11 | 北京利尔高温材料股份有限公司 | A kind of long nozzle for continuous casting and its manufacturing method |
| CN106694866A (en) * | 2017-03-28 | 2017-05-24 | 马鞍山钢铁股份有限公司 | Steel ladle protective sleeve |
| CN107598147B (en) * | 2017-09-19 | 2023-07-25 | 石家庄钢铁有限责任公司 | Plastic composite molten steel protection pouring sealing method |
| CN108103271B (en) * | 2018-01-25 | 2023-07-25 | 石家庄钢铁有限责任公司 | Device and method for preventing secondary oxidation of molten steel |
| CN113102743B (en) * | 2021-04-15 | 2022-09-13 | 北京利尔高温材料股份有限公司 | High-reliability preheating-free long nozzle for continuous casting and manufacturing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06106315A (en) * | 1992-09-29 | 1994-04-19 | Kurosaki Refract Co Ltd | Gas supply pipe for gas blowing nozzle |
| CN2464479Y (en) * | 2001-02-26 | 2001-12-12 | 宝山钢铁股份有限公司 | Composite continuous casting long gate |
| CN201058374Y (en) * | 2007-07-03 | 2008-05-14 | 邯郸钢铁股份有限公司 | Hermetic type ladle long nozzle |
| CN201320605Y (en) * | 2008-04-17 | 2009-10-07 | 首钢总公司 | Long water gap combined argon blowing airproof device for continuous casting |
| CN102166636A (en) * | 2011-03-01 | 2011-08-31 | 胜威高温陶瓷(鞍山)有限公司 | Long steel ladle nozzle for cleaning molten steel |
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