CN207655876U - A kind of continuous casting production Argon metallurgical plant - Google Patents
A kind of continuous casting production Argon metallurgical plant Download PDFInfo
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- CN207655876U CN207655876U CN201721830194.3U CN201721830194U CN207655876U CN 207655876 U CN207655876 U CN 207655876U CN 201721830194 U CN201721830194 U CN 201721830194U CN 207655876 U CN207655876 U CN 207655876U
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- air curtain
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Abstract
The utility model is related to a kind of continuous casting production Argon metallurgical plants, including turbulence inhibitor (1), impregnating cover (2), bar shaped air curtain barricade wall (3), dam (4), it is characterized in that, the Argon Bubble air curtain barrier that " invisible " is formed with bar shaped air curtain barricade wall big flow Argon replaces the barricade of " tangible ", so that Argon Bubble adherency field trash floating upward quickly and removal, improve inclusion removal rate, and the Argon control method by improving bar shaped air curtain barricade wall, creatively solves the technical barrier that slag enters in impregnating cover, venthole on optimization design impregnating cover simultaneously, improve the baking temperature and its homogeneity of impregnating cover and its surrounding liner in dundish, shorten the baking time of liner in dundish and impregnating cover, improve the service life of impregnating cover.
Description
Technical field
The utility model is related to a kind of continuous casting production Argon metallurgical plants, belong to Ferrous Metallurgy steelmaking technical field.
Background technology
Existing continuous casting production air curtain barricade wall technology, can remove field trash in molten steel, play cleaning molten steel to a certain extent
Purpose, but still there are following technological deficiencies：Air curtain barricade wall and the combination of existing turbulence inhibitor, barricade, dam are arranged
Defective, air curtain barricade wall Argon control method is defective, causes molten steel slag problem, affects field trash removal rate.
CN106513608A (application numbers：201611141848.1) and CN206296434U (application numbers
201621359506.2) disclose a kind of slab CC tundish bar shaped air curtain barricade wall covering ar blowing refining device and argon gas control
Method processed, including turbulence inhibitor, impregnating cover, bar shaped air curtain barricade wall, barricade, dam, impregnating cover are being located at bar shaped air curtain barricade wall just
Top, the lower end of impregnating cover immerse continuous casting steel and guarantee replacement in packet procedures tundish pouring molten steel minimum level hereinafter, it uses Argon
Control system PLC is collected by ethernet communication, uploads first pressure gauge pressure values, metallurgical special mass flow controller flow
Value, second pressure gauge pressure values execute the argon flow amount of Argon control system PLC to continuous casting basic automation systems database
Instruction is automatically controlled, according to the variation of molten steel net weight in tundish, adjust automatically argon flow amount, realization is precisely controlled, and is improved
Tundish removes the effect of field trash in molten steel.The invention has the following defects：(1) combination of air brick and barricade is disposed with scarce
It falls into, bar shaped air curtain barricade wall is located at before barricade, after the Argon Bubble adherency inclusion floating that bar shaped air curtain barricade wall Argon is formed, and rolls over
The lower part for returning barricade flows up then under the blocking of dam, molten steel laminar surface flow is formed, although increasing stopping for molten steel
The time is stayed, dead zone ratio is reduced, is conducive to the temperature and ingredient of molten steel in uniform tundish, but is susceptible to slag problem,
Also it is unfavorable for floating upward quickly and the removal of Argon Bubble adherency field trash, affects inclusion removal rate；(2) Argon control method has
Defect：It unwraps greatly after pouring, when molten steel will go into impregnating cover in tundish, big flow blowing argon gas is not taken, slag
It drives away so that part slag enters in impregnating cover, is susceptible to molten steel slag problem in impregnating cover；(3) logical on impregnating cover
Stomata is few, and arrangement is unreasonable, affects the baking temperature of impregnating cover and its installation position liner in dundish, affects dipping
Cover service life.
Invention content
In view of the drawbacks of the prior art, the utility model provides a kind of continuous casting production Argon metallurgical plant, this practicality is new
Type forms air curtain barricade wall, impregnating cover, dam optimum organization technology arrangement " invisible " with bar shaped air curtain barricade wall big flow Argon
Argon Bubble air curtain barrier replaces the barricade of " tangible " so that Argon Bubble adheres to field trash floating upward quickly and removal, and passes through improvement
The Argon control method of bar shaped air curtain barricade wall creatively solves the technical barrier that slag enters in impregnating cover, while excellent
Change and devise venthole on impregnating cover, improves the baking temperature of impregnating cover and its surrounding liner in dundish and its uniform
Property, the utility model is than Comparison study example CN106513608A (application numbers：201611141848.1) it is used for wide thickness plate continuous casting machine
Continuous casting billet sample electrolysis field trash weight 15% or more the reduction on year-on-year basis of cast production Q690D, liner in dundish and impregnating cover
Baking time shortens 0.5 hour or more on year-on-year basis, and impregnating cover service life improves 4 hours on year-on-year basis or more.
The technical solution of the utility model is as follows：
A kind of continuous casting production Argon metallurgical plant, including turbulence inhibitor (1), impregnating cover (2), bar shaped air curtain barricade wall
(3), dam (4), which is characterized in that turbulence inhibitor (1) is mounted on the inside of tundish beam impact zone containment wall working lining,
Longitudinal centre line is overlapped with the center line of ladle long nozzle (13), and bar shaped air curtain barricade wall (3) and the bottom end of dam (4) are all fixed on
In tundish packet bottom permanent liner (9), and it is partly embedded into tundish and underwrites lining work in (8)；The two side ends of impregnating cover (2) are all fixed
In in tundish containment wall permanent liner, impregnating cover (2) be located at right over bar shaped air curtain barricade wall (3) and with bar shaped air curtain barricade wall (3) phase
Right, the longitudinal centre line of impregnating cover (2) is overlapped with the longitudinal centre line of bar shaped air curtain barricade wall (3), the lower end position of impregnating cover (2)
It guarantees replacement in packet procedures tundish under pouring molten steel minimum level (6) in continuous casting steel, the upper end of impregnating cover (2) is located at slagging operation
Tundish on molten steel highest liquid level (7), the height H of dam (4) is 320~420mm, dam (4) and tundish packet bottom
The horizontal distance a on the vertex (A) at permanent liner turning be 450~500mm, bar shaped air curtain barricade wall (3) center line to dam (4) away from
It is 550~650mm from b.The Argon Bubble air curtain barrier that " invisible " is formed with bar shaped air curtain barricade wall big flow Argon replaces " tangible "
Barricade so that Argon Bubble adheres to field trash floating upward quickly and removal.
A points are the vertex at tundish packet bottom permanent liner (9) turning, and inclined hole angle of inclination beta is the inclined hole and tundish water of dam (4)
The angle that plane is formed.
Preferably, the impregnating cover (2) is arc structure, and a big venthole of row is arranged on impregnating cover longitudinal centre line
(16), the small venthole of a row (17), big venthole (16) and the two small ventholes (17) of row are respectively arranged on two and half arc center lines
Interlaced arrangement.It is furthermore preferred that being equally spaced the big venthole of a row (16), two and half arc center lines on impregnating cover longitudinal centre line
It is upper to be equally spaced the small venthole of a row (17), big venthole (16) and two small venthole (17) interlaced arrangements of row, dam respectively
(4) two inclined holes (19) are arranged in middle and lower part.
The utility model is preferred, and the diameter D of the big venthole (16) of impregnating cover is 22~28mm, and spacing x is 280~
The diameter d of 320mm, the small venthole (17) of impregnating cover are 16~20mm, and the center of the two small ventholes (17) of row is positioned at adjacent
On the perpendicular bisector of two big venthole (16) line of centres.
The utility model is preferred, and the distance c of the upper end of the impregnating cover (2) to tundish cover (12) lower end is 40~
110mm。
The utility model is preferred, and the diameter ￠ of upper two inclined holes (19) of dam (4) is 90~100mm, inclined hole
(19) angle of inclination beta is 20 °~25 °, and the height n of inclined hole (19) most lower edge is 25~35mm, inclined hole (19) center to side away from
It is 250~360mm from m, the thickness e of dam (4) is 120~180mm.
The bar shaped air curtain barricade wall (2), the magnesia bar shaped air curtain barricade wall of diffusion-type produced using the prior art, including bar shaped
Air curtain barricade wall matrix (20), gas chamber (21), air inlet pipe (24), are provided with gas chamber (21) in air brick matrix (20), gas chamber into
Gas end is embedded in casing (22), and for installing, fixing air inlet pipe (24), one end of air inlet pipe (24) is connected to gas chamber, and the other end is stretched
Go out air brick matrix, connects air source.Preferably, casing (22) is sealed by lute in (23).
The turbulent flow suppressor (1), impregnating cover (2), dam (4), are all made of the prior art and castable pour into
Type, and fired in 400~450 DEG C of medium temperatures.
The beneficial effects of the utility model：
1) the utility model in continuous casting production by turbulence inhibitor (1), impregnating cover (2), bar shaped air curtain barricade wall (3),
Dam (4) Combinatorial Optimization technology arrangement, barricade in the prior art is removed, and increase dam (4) height H be 320~
The horizontal distance a on 420mm, dam (4) and the vertex (A) at tundish packet bottom permanent liner turning is 450~500mm, bar shaped air curtain
The distance b of barricade (3) center line to dam (4) is the designs such as 550~650mm, is formed with bar shaped air curtain barricade wall big flow Argon
The Argon Bubble air curtain barrier of " invisible " replaces the barricade of " tangible ", optimizes the operating path of Argon Bubble adherency inclusion floating,
So that Argon Bubble adherency field trash floating upward quickly and removal.By the utility model and comparative example CN106513608A (application numbers：
201611141848.1) the inclusion removal rate that mathematical simulation calculation obtains that ar blowing refining device uses improve on year-on-year basis 13% with
On.
2) the big venthole of a row (16) and two and half are equally spaced on impregnating cover longitudinal centre line described in the utility model
It is equally spaced the small venthole of a row (17) on arc center line respectively, big venthole (16) and the two small ventholes (17) of row are interlocked cloth
It sets so that after the gas burner of big fire baking tundish touches the bottom and bounce back up, and be upward through big venthole (16), small venthole
(17), the baking temperature and its homogeneity for which thereby enhancing impregnating cover (2) and its surrounding liner in dundish (9), using this reality
With the time of novel baking liner in dundish and impregnating cover than Comparison study example CN106513608A (application numbers：
201611141848.1) shorten 0.5 hour or more on year-on-year basis, the service life of impregnating cover improves 4 hours on year-on-year basis or more, it achieves
Advantageous effect；
3) argon flow amount when the utility model bar shaped air curtain barricade wall (3) molten steel in tundish normally pours into a mould liquid level (5)
For 85~100NL/min, than Comparison study example CN106513608A (application numbers：201611141848.1) under equal conditions
30~40NL/min, doubles above on year-on-year basis, increases the closeness of Argon Bubble, improves Argon Bubble capture, removal is mingled with
The ability of object, and molten steel will go into before impregnating cover in tundish, rapid big flow Argon blows away slag, solves
Slag enters the technical barrier in impregnating cover, further improves the inclusion removal rate of tundish Argon metallurgical plant,
The continuous casting billet sample electrolysis field trash weight ratio Comparison study example CN106513608A of production Q690D is poured into a mould using the utility model
(application number：201611141848.1) the electrolysis field trash weight in the continuous casting billet produced reduces 15% or more on year-on-year basis, achieves
Advantageous effect；
4) lower end of the utility model impregnating cover (2) is located at continuous casting steel and guarantees replacement the minimum liquid of pouring molten steel in packet procedures tundish
Under face (6), the upper end of impregnating cover (2) is located in the tundish of slagging operation on molten steel highest liquid level (7) so that dipping
Covering (2) has slag stopping function, and the slag brought into molten steel (14) is all kept off the beam area in tundish, i.e. impregnating cover (2)
Region where the ladle long nozzle (13) in left side, and as slag (14) thickness z >=60mm in tundish, by steel in tundish
Slag (14) is released from tundish overflow port (15), is further reduced pollution of the slag to molten steel, is achieved advantageous effect.
Description of the drawings
Fig. 1 is the technology arrangement schematic diagram that the utility model is used for continuous casting production Argon metallurgical plant；
Fig. 2 is the B-B sectional views of Fig. 1；
Fig. 3 is the structural front view of impregnating cover in the utility model embodiment；
Fig. 4 is the vertical view of Fig. 3；
Fig. 5 is the structural front view of dam in the utility model embodiment；
The structure left view of dam in Fig. 6 the utility model embodiments；
Fig. 7 is the structural schematic diagram of bar shaped air curtain barricade wall in the utility model embodiment.
In figure, 1. turbulence inhibitors；2. impregnating cover；3. bar shaped air curtain barricade wall；4. dam；5. molten steel normally pours in tundish
Fluid injection face；The pouring molten steel minimum level in packet procedures tundish 6. continuous casting steel is guaranteed replacement；7. slagging operation tundish in molten steel most
High liquid level (HLL)；8. liner in dundish；9. tundish permanent liner；10. filling pipe end；11. magnesia coating；12. tundish cover；
13. ladle long nozzle；14. slag in tundish；15. tundish overflow port；16. the big venthole at the top of impregnating cover；17. leaching
The small venthole of stain cover waist；18. metal tube；19. the inclined hole in dam；20. air curtain barricade wall matrix；21. gas chamber；22. insertion
Casing；23. lute in；24. air inlet pipe.A points are the vertex at tundish packet bottom permanent liner turning, and inclined hole angle of inclination beta is dam
The angle that inclined hole is formed with tundish horizontal plane.
Specific implementation mode
With reference to specific embodiment, the utility model is described in further detail, but not limited to this.
The magnesia coating, castable, coverture, carbonization rice husk are convenient source, commercial products.
Embodiment 1：
A kind of continuous casting production Argon metallurgical plant, structure as shown in Fig. 1-Fig. 7, including turbulence inhibitor 1, impregnating cover 2,
Bar shaped air curtain barricade wall 3, dam 4, turbulence inhibitor is in the inside of tundish beam impact zone containment wall working lining, longitudinal direction
Heart line is overlapped with the center line of big packet long nozzle 13, and tundish packet bottom is all fixed on forever in the bottom end of bar shaped air curtain barricade wall 3 and dam 4
It long on lining 9, and is partly embedded into tundish and underwrites lining work in 8, impregnating cover 2 is located at right over bar shaped air curtain barricade wall 3 and and bar shaped
Air curtain barricade wall 3 is opposite, and the longitudinal centre line of impregnating cover 2 is overlapped with the longitudinal centre line of bar shaped air curtain barricade wall 3, and the two of impregnating cover 2
Side is all fixed in tundish containment wall permanent liner, and the lower end of impregnating cover 2 is located at continuous casting steel and guarantees replacement molten steel in packet procedures tundish
It pours into a mould under minimum level 6, the upper end of impregnating cover 2 is located in the tundish of slagging operation on molten steel highest liquid level 7, with item
3 big flow Argon of shape air curtain barricade wall forms the barricade of the Argon Bubble air curtain barrier replacement " tangible " of " invisible " so that Argon Bubble is viscous
Attached field trash floating upward quickly and removal, the impregnating cover 2 are arc structure, and a row are equally spaced on impregnating cover longitudinal centre line
The small venthole 17 of a row is equally spaced on 16 and two and half arc center line of big venthole respectively, the row of big venthole 16 and two are small logical
Two inclined holes 19 are arranged in the middle and lower part of 17 interlaced arrangement of stomata, dam 4, and the height H of dam 4 is 420mm, dam 4 and tundish
The horizontal distance a for wrapping the vertex A at bottom permanent liner turning is 500mm, and the distance b of 3 center line of bar shaped air curtain barricade wall to dam 4 is
550mm。
The A points are the vertex at 9 turning of tundish packet bottom permanent liner, and the inclined hole angle of inclination beta is inclined hole and the centre of dam 4
The angle that packet horizontal plane is formed.
The diameter D that one be equally spaced on the impregnating cover longitudinal centre line arranges big venthole 16 is 28mm, and spacing x is
The diameter d of 320mm, the small venthole of the row that are equally spaced respectively on two and half arc center lines 17 are 20mm, the two small ventilations of row
The center in hole 17 is located on the perpendicular bisector of two neighboring 16 line of centres of big venthole.
The distance c of the upper end of the impregnating cover 2 to 12 lower end of tundish cover is 110mm.
The diameter ￠ of two inclined holes 19 is 100mm in the dam 4, and the angle of inclination beta of inclined hole 19 is 25 °, the most lower edge of inclined hole 19
Height n be 25mm, the distance m at 19 center of inclined hole to side is 360mm, and the thickness e of dam 4 is 180mm.
The bar shaped air curtain barricade wall 2, the magnesia bar shaped air curtain barricade wall of diffusion-type produced using the prior art, including bar shaped gas
Curtain barricade matrix 20, gas chamber 21, air inlet pipe 24 are provided with gas chamber 21 in air brick matrix 20, and the inlet end of gas chamber is embedded in casing
22, for installing, fixing air inlet pipe 24, one end of air inlet pipe 24 is connected to gas chamber, and the other end stretches out air brick matrix, connects gas
Source.
The turbulent flow suppressor 1, impregnating cover 2, dam 4, are all made of the prior art and castable moulding by casting, and
400~450 DEG C of medium temperatures are fired.
The argon gas control method of continuous casting production Argon metallurgical plant, using 3 Argon stream of PLC control bar shapeds air curtain barricade wall
Amount introduces Tundish during Continuous Casting weighing-up wave, and 3 argon blowing rate of air curtain barricade wall is set according to molten steel net weight in tundish.Institute
Tundish during Continuous Casting is stated and reaches that open the molten steel net weight for pouring liquid level be 12t, when molten steel will go into impregnating cover 2 in tundish
Molten steel net weight be 19t, molten steel net weight when normally pouring into a mould liquid level 5 in tundish is 28t, and ladle changes the tundish after the completion of packet
Molten steel net weight when interior minimum level 6 is 22t.Using the argon blowing rate of PLC control bar shapeds air curtain barricade wall 3, include the following steps：
The first step receives and originally pours the molten steel of time the 1st stove and unwrap and pour signal, judges molten steel net weight ＜ in 12t≤tundish
19t for the first time, starts Argon, the argon flow amount 40NL/min of setting bar shaped air curtain barricade wall 3；
Second step judges that molten steel net weight ＜ 22t are for the first time in 19t≤tundish, the rapid argon for increasing bar shaped air curtain barricade wall 3
Throughput, the argon flow amount 200NL/min of setting bar shaped air curtain barricade wall 3；
Third walks, and judges that molten steel net weight ＜ 28t are for the first time in 22t≤tundish, the argon gas stream of setting bar shaped air curtain barricade wall 3
Measure 75NL/min；
4th step judges molten steel net weight in tundish >=28t for the first time, the argon flow amount of setting bar shaped air curtain barricade wall 3
100NL/min；
5th step, pouring molten steel finishes, replaces steel ladle in steel ladle, judges molten steel net weight ＜ 28t in 22t≤tundish
Second, the argon flow amount 75NL/min of setting bar shaped air curtain barricade wall 3；
6th step, molten steel are guaranteed replacement after the completion of packet, are judged second of molten steel net weight >=28t in tundish, are set bar shaped air curtain
The argon flow amount 100NL/min of barricade 3；
7th step, after the 4th step, molten steel net weight may repeat the condition for meeting the first step in middle packet, need to repeat
Second step is to the 4th step；
8th step, receive originally pour time last stove steel ladle stop pour signal, judge molten steel net weight ＜ 22t in tundish
When, stop 3 Argon of bar shaped air curtain barricade wall.
The utility model also provides pushing off the slag and the slagging method of a kind of continuous casting production Argon metallurgical plant：
1) slag stopping method in tundish：The lower end of impregnating cover 2 of the present invention is located at continuous casting steel and guarantees replacement steel in packet procedures tundish
Water is poured into a mould under minimum level 6, and the upper end of impregnating cover 2 is located in the tundish of slagging operation on molten steel highest liquid level 7 so that
Impregnating cover 2 has slag stopping function, and by the slag 14 brought into molten steel, all beam area of the gear in tundish, i.e. impregnating cover 2 are left
Region where the ladle long nozzle 13 of side；
2) tundish slagging method：As 14 thickness z >=60mm of slag in tundish, liquid steel level in tundish is improved
Molten steel highest liquid level 7 in the tundish operated to slagging, slag in tundish 14 is released from tundish overflow port 15, then in
Between wrap in liquid steel level be reduced to normal cast liquid level 5, then tundish beam area be added coverture or carbonization rice husk 40~
60kg is further reduced pollution of the slag to molten steel.
The magnesia coating, castable, coverture, carbonization rice husk are convenient source, commercial products.
Embodiment 2
Continuous casting production Argon metallurgical plant as described in Example 1, the difference is that：
The height H of the dam 4 is 320mm, the horizontal distance a of dam 4 and the vertex A at tundish packet bottom permanent liner turning
Distance b for 450mm, 3 center line of bar shaped air curtain barricade wall to dam 4 is 650mm.
The diameter D that one be equally spaced on the impregnating cover longitudinal centre line arranges big venthole 16 is 22mm, and spacing x is
The diameter d of 280mm, the small venthole of the row that are equally spaced respectively on two and half arc center lines 17 are 16mm.
The distance c of the upper end of the impregnating cover 2 to 12 lower end of tundish cover is 40mm.
The diameter ￠ of two inclined holes 19 is 90mm in the dam 4, and the angle of inclination beta of inclined hole 19 is 20 °, the most lower edge of inclined hole 19
Height n is 35mm, and the distance m at 19 center of inclined hole to side is 250mm, and the thickness e of dam 4 is 120mm.
The argon blowing rate using PLC control bar shapeds air curtain barricade wall 3 includes the following steps：
The first step receives and originally pours the molten steel of time the 1st stove and unwrap and pour signal, judges molten steel net weight ＜ in 12t≤tundish
19t for the first time, starts Argon, the argon flow amount 30NL/min of setting bar shaped air curtain barricade wall 3；
Second step judges that molten steel net weight ＜ 22t are for the first time in 19t≤tundish, the rapid argon for increasing bar shaped air curtain barricade wall 3
Throughput, the argon flow amount 150NL/min of setting bar shaped air curtain barricade wall (3)；
Third walks, and judges that molten steel net weight ＜ 28t are for the first time in 22t≤tundish, the argon gas stream of setting bar shaped air curtain barricade wall 3
Measure 65NL/min；
4th step judges molten steel net weight in tundish >=28t for the first time, the argon flow amount of setting bar shaped air curtain barricade wall 3
85NL/min；
5th step, pouring molten steel finishes, replaces steel ladle in steel ladle, judges molten steel net weight ＜ 28t in 22t≤tundish
Second, the argon flow amount 65NL/min of setting bar shaped air curtain barricade wall 3；
6th step, molten steel are guaranteed replacement after the completion of packet, are judged second of molten steel net weight >=28t in tundish, are set bar shaped air curtain
The argon flow amount 85NL/min of barricade 3；
7th step, after the 4th step, molten steel net weight may repeat the condition for meeting the first step in middle packet, need to repeat
Second step is to the 4th step；
8th step, receive originally pour time last stove steel ladle stop pour signal, judge molten steel net weight ＜ 22t in tundish
When, stop 3 Argon of bar shaped air curtain barricade wall.
Embodiment 3
Continuous casting production Argon metallurgical plant as described in Example 1, the difference is that：
The height H of the dam 4 is 380mm, the horizontal distance a of dam 4 and the vertex A at tundish packet bottom permanent liner turning
Distance b for 480mm, 3 center line of bar shaped air curtain barricade wall to dam 4 is 600mm.
The diameter D that one be equally spaced on the impregnating cover longitudinal centre line arranges big venthole 16 is 26mm, and spacing x is
The diameter d of 300mm, the small venthole of the row that are equally spaced respectively on two and half arc center lines 17 are 18mm.
The distance c of the upper end of the impregnating cover 2 to 12 lower end of tundish cover is 70mm.
The diameter ￠ of two inclined holes 19 is 95mm in the dam 4, and the angle of inclination beta of inclined hole 19 is 22 °, the most lower edge of inclined hole 19
Height n is 30mm, and the distance m at 19 center of inclined hole to side is 300mm, and the thickness e of dam 4 is 150mm.
The argon blowing rate using PLC control bar shapeds air curtain barricade wall 3 includes the following steps：
The first step receives and originally pours the molten steel of time the 1st stove and unwrap and pour signal, judges molten steel net weight ＜ in 12t≤tundish
19t for the first time, starts Argon, the argon flow amount 35NL/min of setting bar shaped air curtain barricade wall 3；
Second step judges that molten steel net weight ＜ 22t are for the first time in 19t≤tundish, the rapid argon for increasing bar shaped air curtain barricade wall 3
Throughput, the argon flow amount 170NL/min of setting bar shaped air curtain barricade wall (3)；
Third walks, and judges that molten steel net weight ＜ 28t are for the first time in 22t≤tundish, the argon gas stream of setting bar shaped air curtain barricade wall 3
Measure 70NL/min；
4th step judges molten steel net weight in tundish >=28t for the first time, the argon flow amount of setting bar shaped air curtain barricade wall 3
90NL/min；
5th step, pouring molten steel finishes, replaces steel ladle in steel ladle, judges molten steel net weight ＜ 28t in 22t≤tundish
Second, the argon flow amount 70NL/min of setting bar shaped air curtain barricade wall 3；
6th step, molten steel are guaranteed replacement after the completion of packet, are judged second of molten steel net weight >=28t in tundish, are set bar shaped air curtain
The argon flow amount 90NL/min of barricade 3；
7th step, after the 4th step, molten steel net weight may repeat the condition for meeting the first step in middle packet, need to repeat
Second step is to the 4th step；
8th step, receive originally pour time last stove steel ladle stop pour signal, judge molten steel net weight ＜ 22t in tundish
When, stop 3 Argon of bar shaped air curtain barricade wall.
Experimental example
Comparative example：CN106513608A (application numbers：201611141848.1) and CN206296434U (application numbers
201621359506.2) disclose a kind of slab CC tundish bar shaped air curtain barricade wall covering ar blowing refining device and argon gas control
Method.
By the utility model embodiment 1-3 and the ar blowing refining device of comparative example according to 1:1 establishes digital-to-analogue, and simulation calculates
The inclusion removal rate comparative analysis gone out is as shown in table 1：
Table 1
| Scheme | Inclusion removal rate/% |
| Embodiment 1 | 98.57 |
| Embodiment 2 | 98.42 |
| Embodiment 3 | 98.51 |
| Comparative example | 85.17 |
By the continuous casting production Argon metallurgical plant of embodiment 1-3 and argon gas control method and one kind disclosed in comparative example 1
Slab CC tundish bar shaped air curtain barricade wall covering ar blowing refining device and argon gas control method are in Laiwu steel enterprise silver mountain type
Steel Co., Ltd steel mill list stream wide slab continuous caster machine cast production steel grade Q690D, measures strand bulk sample electrolysis field trash in
Between packet to dry packet time, impregnating cover service life comparative analysis as shown in table 2：
Table 2
By the data comparison of table 1, inclusion removal rate that the mathematical simulation calculation of the utility model embodiment 1-3 obtains
Than comparative example CN106513608A (application numbers：201611141848.1) 13% or more is improved on year-on-year basis.
By the data comparison of table 2, using the continuous casting production Argon metallurgical plant and argon gas controlling party of the utility model
Method, the continuous casting billet sample that embodiment 1-3 is produced are electrolysed field trash weight ratio Comparison study example CN106513608A (application numbers：
201611141848.1) the electrolysis field trash weight in the continuous casting billet produced reduces 15% or more, in embodiment 1-3 continuous castings on year-on-year basis
Between the baking packet time of packet working lining and impregnating cover than Comparison study example CN106513608A (application numbers：201611141848.1) same
Than reducing 0.5 hour or more, impregnating cover service life prepared by embodiment 1-3 is than comparative example CN106513608A (application numbers：
201611141848.1) improve 4 hours on year-on-year basis or more.
Claims (8)
1. a kind of continuous casting production Argon metallurgical plant, including turbulence inhibitor (1), impregnating cover (2), bar shaped air curtain barricade wall (3),
Dam (4), which is characterized in that turbulence inhibitor (1) is mounted on the inside of tundish beam impact zone containment wall working lining, longitudinal direction
Center line is overlapped with the center line of ladle long nozzle (13), and centre is all fixed in bar shaped air curtain barricade wall (3) and the bottom end of dam (4)
In packet bottom permanent liner (9), and it is partly embedded into tundish and underwrites lining work in (8)；During the two side ends of impregnating cover (2) are all fixed on
Between in packet containment wall permanent liner, impregnating cover (2) is located at right over bar shaped air curtain barricade wall (3) and with bar shaped air curtain barricade wall (3) relatively, leaching
The longitudinal centre line of stain cover (2) is overlapped with the longitudinal centre line of bar shaped air curtain barricade wall (3), and the lower end of impregnating cover (2) is located at continuous casting
Ladle changes in packet procedures tundish under pouring molten steel minimum level (6), and the upper end of impregnating cover (2) is located at the centre of slagging operation
In packet on molten steel highest liquid level (7).
2. continuous casting production Argon metallurgical plant as described in claim 1, which is characterized in that the height H of dam (4) is 320
The horizontal distance a on~420mm, dam (4) and the vertex (A) at tundish packet bottom permanent liner turning is 450~500mm, bar shaped gas
The distance b of curtain barricade (3) center line to dam (4) is 550~650mm.
3. continuous casting production Argon metallurgical plant as described in claim 1, which is characterized in that the impregnating cover (2) is circular arc
Structure, the big venthole (16) of one row of arrangement on impregnating cover longitudinal centre line, to be respectively arranged a row on two and half arc center lines small logical
Stomata (17), big venthole (16) and two small venthole (17) interlaced arrangements of row.
4. continuous casting production Argon metallurgical plant as claimed in claim 3, which is characterized in that impregnating cover longitudinal centre line is first-class
It is equally spaced the small venthole of a row (17) respectively on the big venthole (16) of one row of spacing arrangement, two and half arc center lines, it is big logical
Two inclined holes (19) are arranged in stomata (16) and two small venthole (17) interlaced arrangements of row, the middle and lower part of dam (4).
5. continuous casting production Argon metallurgical plant as claimed in claim 4, which is characterized in that the big venthole (16) of impregnating cover
Diameter D be 22~28mm, spacing x is 280~320mm, and the diameter d of the small venthole (17) of impregnating cover is 16~20mm, two
The center for arranging small venthole (17) is located on the perpendicular bisector of two neighboring big venthole (16) line of centres.
6. continuous casting production Argon metallurgical plant as described in any one in claim 1-5, which is characterized in that the impregnating cover
(2) the distance c of upper end to tundish cover (12) lower end is 40~110mm.
7. continuous casting production Argon metallurgical plant as described in any one in claim 1-5, which is characterized in that the dam (4)
The diameter ￠ of upper two inclined holes (19) is 90~100mm, and the angle of inclination beta of inclined hole (19) is 20 °~25 °, inclined hole (19) most lower edge
Height n is 25~35mm, and the distance m at inclined hole (19) center to side is 250~360mm, the thickness e of dam (4) for 120~
180mm。
8. continuous casting production Argon metallurgical plant as described in any one in claim 1-5, it is characterised in that the bar shaped air curtain
Barricade (3) is the magnesia bar shaped air curtain barricade wall of diffusion-type, including bar shaped air curtain barricade wall matrix (20), gas chamber (21), air inlet pipe
(24), is provided with gas chamber (21) in air brick matrix (20), the inlet end insertion casing (22) of gas chamber, for install, fix into
One end of tracheae (24), air inlet pipe (24) is connected to gas chamber, and the other end stretches out air brick matrix, connects air source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721830194.3U CN207655876U (en) | 2017-12-25 | 2017-12-25 | A kind of continuous casting production Argon metallurgical plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721830194.3U CN207655876U (en) | 2017-12-25 | 2017-12-25 | A kind of continuous casting production Argon metallurgical plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992680A (en) * | 2020-08-28 | 2020-11-27 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
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2017
- 2017-12-25 CN CN201721830194.3U patent/CN207655876U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992680A (en) * | 2020-08-28 | 2020-11-27 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
| CN111992680B (en) * | 2020-08-28 | 2022-03-01 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
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