CN201997699U - Argon blown prefabricated part for continuous casting tundish cover - Google Patents
Argon blown prefabricated part for continuous casting tundish cover Download PDFInfo
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- CN201997699U CN201997699U CN2011201004904U CN201120100490U CN201997699U CN 201997699 U CN201997699 U CN 201997699U CN 2011201004904 U CN2011201004904 U CN 2011201004904U CN 201120100490 U CN201120100490 U CN 201120100490U CN 201997699 U CN201997699 U CN 201997699U
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- prefabricated part
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- tundish
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Abstract
The utility model relates to an argon blown prefabricated part for a continuous casting tundish cover, which belongs to the technical field of ferrous metallurgical equipment. Argon blown prefabricated parts of different sizes are designed respectively according to sizes of holes of the tundish cover, such as baking holes, feed holes, injection holes and the like. The argon blown prefabricated part comprises a prefabricated part body, and the prefabricated part body is in the shape a cone frustum while the radius of the top of the cone frustum is larger than that of the bottom, or the longitudinal section of the prefabricated part body is in a T-shaped structure. A ventilation duct is disposed in the prefabricated part body which is hollow, and a vent hole communicated with the ventilation duct is arranged on the prefabricated part body. The problems of peripheral deformation of the baking holes and the injection holes and falling of refractories are solved so that smooth casting is guaranteed, sealing of the tundish cover is improved, temperature drop of molten steel is reduced, secondary oxidization of the molten steel is avoided, and the service life of the tundish cover can be prolonged.
Description
Technical field
The utility model relates to the middle clad Argon prefabricated component of a kind of continuous casting, belongs to the Ferrous Metallurgy equipment technical field.
Background technology
Along with the fast development of metallurgical technology and user further raising to steel cleanliness factor, quality requirement, the continuous casting tundish, container as the liquid molten steel of last splendid attire in the STEELMAKING PRODUCTION flow process, by original only as the simple receptacle of the holder of molten steel and distributor to having the molten steel of preventing secondary oxidation, remove steel inclusion, improve multi-functional metallurgical reactions such as molten steel cleanness, microalloying and change.
Tundish generally all is furnished with the tundish clad, generally is provided with stopper installing hole, baking hole, plug hole, charging aperture, thermometer hole, thief hole etc. on the tundish clad.The main effect of tundish clad is: 1, play heat insulation, insulation, sealing function when tundish baking and cast, reduce molten steel temperature drop and secondary oxidation; 2, improve the execute-in-place environment, carry out the tundish thermometric the ladle operative employee, when taking a sample, adding operations such as heat preserving agent, play the security protection effect; 3, the sled mechanism of protection ladle is avoided the heat radiation of molten steel.
The tundish clad the baking and use in heating temperature all more than 1000 ℃, in casting process because the intense radiation of molten steel, heating temperature is more up to more than 1300 ℃, therefore, the thermal conductivity of tundish clad, heat endurance etc. proposed very high requirement.The tundish clad of current use mainly contains full cast iron or cast steel tundish clad and steel construction-two kinds of forms of refractory material composite construction tundish clad.Full cast iron or cast steel tundish clad are because thermal conductivity factor is big, and reasons such as antioxygenic property difference in use exist to be prone to corrode, steel bonding, distortion, problems of crack, cause the tundish clad low actual life; Steel construction-refractory material composite construction tundish clad is by taking to improve measures such as clad structure, preferred material, at aspects such as heat insulating ability, service lifes bigger improvement is arranged all, but still have following shortcoming: material is fallen in the delamination of tundish clad (particularly toasting around the hole) liner, stop up tundish upper nozzle, cause the accident of watering occurring opening and pour into a mould later stage clad distortion seriously, problems such as tundish sealing property variation, molten steel secondary oxidation degree increase the weight of.At present; by taking related technical measures to improve the heat-insulating property of tundish, improve heat insulation effect, the distortion in less cast later stage avoids the anti-material of liner to come off; the sealing property of clad in the middle of improving, increase to the protection effect of molten steel etc. become improve in the middle of the main developing direction of clad.
CN2813160 discloses a kind of tundish clad with the winding-up structure, it is the cover body structure of intermediate projections, offers through hole on the lid, is embedded with the winding-up pipeline at middle clad body, have injection hole on the middle clad body, the winding-up pipeline is communicated in respectively and covers injection hole.The utility model is used for unwrapping greatly to be driven air in the tundish out of before watering, and reduces and opens when watering the secondary oxidation of molten steel in the tundish.Average nitrogen increased amount is 9ppm after using the utility model Argon, ratio not Argon reduces nitrogen pick-up 18ppm, this quality for the oxide inclusions that reduces strand, raising strand plays positive role, but there is following shortcoming in this device: 1, material is fallen in tundish clad (particularly toasting around the hole) the easy delamination of liner in baking, casting process, stop up tundish upper nozzle, cause the accident of watering occurring opening and pour into a mould later stage clad distortion seriously, clad is short service life; 2, the baking hole on the tundish clad, charging aperture and plug hole easy deformation, hole wall be full of cracks, clad is changed frequency to be increased, and often changes that the tundish clad is wasted time and energy and cost increases; 3, clad sealing, heat insulation effect are poor, and molten steel temperature drop and secondary oxidation degree increase the weight of.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, provide a kind of continuous casting middle clad Argon prefabricated component, clad plays in bake process with the Argon prefabricated component and reduces tundish bottoming hole peripheral distortion in the middle of this continuous casting, prevents that anti-material from coming off, and guarantees to open to water direct motion; Improve sealing, the heat insulation effect of middle clad, prevent the secondary oxidation of molten steel, guarantee the tundish metallurgy effect.
Implementing measure of the present utility model is as follows:
Clad Argon prefabricated component in the middle of a kind of continuous casting, it is characterized in that: comprise prefabricated part body, prefabricated part body is the hollow setting, is provided with breather line in the described prefabricated part body, and prefabricated part body is provided with the passage that is connected with breather line.
Described prefabricated part body profile is that the upper base radius is a T shape greater than the Rotary-table of the radius of going to the bottom or the vertical section structure of prefabricated part body profile.The prefabricated part body profile is that Rotary-table or vertical section structure are that the advantage of T shape is, having the prefabricated part body of preventing drops in the tundish, the sealing property of clad in the middle of improving simultaneously, molten steel in the tundish is played sealing, insulation effect, reach and reduce molten steel temperature drop and secondary oxidation, the effect that improves molten steel cleanness.
The branched bottom that described breather line comprises the circular passage on top and is connected and extends downwards with the circular passage.
Described circular passage quantity is 1, and branched bottom is the 3-6 bar.
Described branched bottom end extends to the prefabricated part body bottom surface straight down to prefabricated part body edgewise bend or branched bottom end.The branched bottom end is to the advantage of prefabricated part body edgewise bend; after inserting argon gas from external pipe, argon gas is level and sprawls above branched bottom enters tundish; under the prerequisite that does not dispel covering slag and coverture above the tundish molten steel face, effectively play the effect of secluding air.The branched bottom end extends straight down, after inserting argon gas from external pipe, argon gas is behind branched bottom, be blown into straight down, more help original air in the tundish is driven out of in tundish, be mainly used in and opening when watering, drive the original air in the tundish out of, avoid opening when watering molten steel and injecting tundish and contact with air, and contaminated.
Described branched bottom is a Horizontal Exit to prefabricated part body edgewise bend end, and outlet is apart from prefabricated part body bottom surface 10mm-30mm.
The prefabricated part body material is that high alumina matter, magnesia, the anti-material of magnesium carbonaceous water material feeding, and the circular passage is the heat-resistance stainless steel pipe.Fixedly connected with prefabricated part body by reinforcing bar in the circular passage.
Preferably, the prefabricated part body material is a high alumina castable.High alumina castable is meant Al
2O
3Content has characteristics such as cold strength height, good, the anti-antidetonation of wearability, anti-strip and high temperature lower volume good stability greater than 48% castable refractory.
Preferably, passage is arranged on the top of prefabricated part body.
The utility model is applicable to the middle clad of all kinds of continuous castings.Can prevent effectively that the delamination of tundish clad liner from falling material, stop up tundish upper nozzle, cause the accident of watering occurring opening and the distortion of cast later stage clad is serious.
The utility model is not only applicable to argon gas, also is applicable to other inert gases.
The beneficial effects of the utility model are:
(1) compares with traditional tundish clad, the utility model is installed in the baking hole of tundish clad, on charging aperture and the plug hole, the sealing of clad in the middle of improving, molten steel in the tundish is played the seal protection effect, guarantee the metallurgical effect of tundish, in tundish baking and use, can prevent to toast the hole, charging aperture and plug hole distortion, the generation of hole wall crack performance, thereby prolong the service life of clad in the middle of making, the replacing frequency of clad reduces, and only needs to change the middle clad Argon prefabricated component of continuous casting of the present utility model, and it is convenient to change, time saving and energy saving, cost reduces;
(2) in the tundish bake process, can play and improve cured effect, minimizing baking hole peripheral distortion, prevent that anti-material from coming off, stop up tundish upper nozzle, guarantee to open the effect of watering direct motion;
(3) advantage of extending straight down of the branched bottom end in the utility model is, after inserting argon gas from external pipe, argon gas is behind branched bottom, be blown into straight down, more help original air in the tundish is driven out of in tundish, be mainly used in and opening when watering, drive the original air in the tundish out of, avoid opening when watering molten steel and injecting tundish and contact with air, and contaminated;
(4) branched bottom end of the present utility model is to the advantage of prefabricated part body edgewise bend, after inserting argon gas from external pipe, argon gas is above branched bottom enters tundish, being level sprawls, under the prerequisite that does not dispel covering slag and coverture above the tundish molten steel face, effectively play the effect of secluding air;
(5) under normal casting condition, in tundish, feed inert gas such as argon gas by the utility model, can stop extraneous air to enter tundish, particularly in tundish, feed inert gases such as argon gas by the utility model opening under the unstable state casting conditions such as watering, change bag, can drive the air in the tundish away, prevent the secondary oxidation of molten steel;
(6) clad makes tundish clad better heat preservation with the Argon prefabricated component in the middle of the continuous casting of the present utility model, reduces the molten steel temperature drop effectively, improves the execute-in-place environmentAL safety simultaneously.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the structural representation of embodiment 3;
Fig. 6 is the vertical view of Fig. 5;
Fig. 7 is the structural representation of embodiment 4;
Fig. 8 is the vertical view of Fig. 7.
Wherein: 1, prefabricated part body; 2, passage; 3, circular passage; 4, branched bottom; 5, reinforcing bar.
The specific embodiment
Below in conjunction with embodiment the utility model is further elaborated, but the utility model institute protection domain is not limited thereto.
As shown in Figure 1 and Figure 2, clad Argon prefabricated component in the middle of a kind of continuous casting, comprise prefabricated part body 1, prefabricated part body 1 is the hollow setting, be provided with breather line in the prefabricated part body 1, the branched bottom 4 that described breather line comprises the circular passage 3 on top and is connected and extends downwards with circular passage 3, the top of prefabricated part body 1 is provided with the passage 2 that is connected with breather line.Prefabricated part body 1 profile is the Rotary-table of upper base radius greater than the radius of going to the bottom.Branched bottom 4 ends are to prefabricated part body 1 edgewise bend, and curved end is a Horizontal Exit, and outlet is apart from prefabricated part body 1 bottom surface 15mm.Branched bottom 4 is 4, and the quantity of circular passage is 1.
Be provided with a plurality of openings on circular passage 3, branched bottom 4 is connected with circular passage 3 by 3 opening on the circular passage, and 3 not opening part is provided with reinforcing bar 5 in the circular passage, and reinforcing bar 5 is closely fixing with circular passage 3 and prefabricated part body 1.Can be designed to the Argon prefabricated component that varies in size according to the size in the holes such as baking hole, charging aperture and plug hole of middle clad respectively.
Described circular passage 3 is the heat-resistance stainless steel pipe, and the material of prefabricated part body 1 is a high alumina castable.High alumina castable is meant Al
2O
3Content is greater than 48% castable refractory, and the key component of high alumina castable is: Al
2O
3: 65%-75%, SiO
2: 23%-30% all is weight percentage.
Using method:
Before the tundish baking, the baking hole (this prefabricated component also is applicable to holes such as charging aperture, plug hole) of clad in the middle of this prefabricated component can being put into, play and improve cured effect, minimizing steel construction-refractory material composite construction tundish bottoming hole periphery iron-clad distortion, prevent that anti-material from coming off, guarantee to open the effect of watering direct motion; When particularly unstable state is poured into a mould in casting process, feed the external argon gas pipeline in hole by the argon gas on the prefabricated component, the argon gas that feeds certain pressure and flow can stop extraneous air by entering tundish, the sealing of clad in the middle of improving, prevent the secondary oxidation of molten steel, guarantee the tundish metallurgy effect.
Adopt the utility model, under equal process conditions, in the service life that can improve the tundish clad, traditional tundish clad was changed once in 200 hours, use prefabricated component of the present utility model after, the tundish clad can use more than 450 hours.Compare with traditional tundish clad, change the middle clad Argon prefabricated component of continuous casting of the present utility model, change more convenient, time saving and energy saving, with low cost; Replacing time and cost are referring to table 1:
Table 1
As shown in Figure 3, Figure 4, with clad Argon prefabricated component in the middle of embodiment 1 described a kind of continuous casting, difference is:
Described branched bottom 4 ends extend to the prefabricated part body bottom surface straight down, and branched bottom 4 is 3.
Be applicable to continuous casting open water before, can drive the air in the tundish away, prevent the secondary oxidation of molten steel.
Adopt the utility model, under equal process conditions, in the service life that can improve the tundish clad, traditional tundish clad was changed once in 200 hours, use prefabricated component of the present utility model after, the tundish clad can use more than 450 hours.Compare with traditional clad, change clad Argon prefabricated component in the middle of the continuous casting of the present utility model, change more convenient, time saving and energy saving, the cost reduction; Replacing time and cost see the following form 2:
Table 2
As Fig. 5, shown in Figure 6, with clad Argon prefabricated component in the middle of embodiment 1 described a kind of continuous casting, difference is:
The vertical section structure of described prefabricated part body 1 profile is a T shape, and the branched bottom end is to prefabricated part body edgewise bend, and curved end is a Horizontal Exit, and outlet is apart from prefabricated part body 1 bottom surface 20mm, and branched bottom 4 is 3.
Adopt the utility model, under equal process conditions, in the service life that can improve the tundish clad, traditional tundish clad was changed once in 200 hours, use prefabricated component of the present utility model after, the tundish clad can use more than 450 hours.Compare with traditional clad, change clad Argon prefabricated component in the middle of the continuous casting of the present utility model, change more convenient, time saving and energy saving, the cost reduction; Replacing time and cost see the following form 3:
Table 3
As Fig. 7, shown in Figure 8, with clad Argon prefabricated component in the middle of embodiment 1 described a kind of continuous casting, difference is:
The vertical section structure of described prefabricated part body 1 profile is a T shape, and branched bottom 4 ends extend to the prefabricated part body bottom surface straight down, and branched bottom 4 is 6.
Adopt the utility model, under equal process conditions, in the service life that can improve the tundish clad, traditional tundish clad was changed once in 200 hours, use prefabricated component of the present utility model after, the tundish clad can use more than 450 hours.Compare with traditional clad, change clad Argon prefabricated component in the middle of the continuous casting of the present utility model, change more convenient, time saving and energy saving, the cost reduction; Replacing time and cost see the following form 4:
Table 4
Claims (7)
1. clad Argon prefabricated component in the middle of the continuous casting, it is characterized in that: comprise prefabricated part body, prefabricated part body is the hollow setting, is provided with breather line in the described prefabricated part body, and prefabricated part body is provided with the passage that is connected with breather line.
2. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 1, it is characterized in that: described prefabricated part body profile is that the upper base radius is a T shape greater than the Rotary-table of the radius of going to the bottom or the vertical section structure of prefabricated part body profile.
3. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 1 is characterized in that: the branched bottom that described breather line comprises the circular passage on top and is connected and extends downwards with the circular passage.
4. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 3, it is characterized in that: described circular passage quantity is 1, branched bottom is the 3-6 bar.
5. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 3, it is characterized in that: described branched bottom end extends to the prefabricated part body bottom surface straight down to prefabricated part body edgewise bend or branched bottom end.
6. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 5, it is characterized in that: described branched bottom is a Horizontal Exit to prefabricated part body edgewise bend end, outlet is apart from prefabricated part body bottom surface 10mm-30mm.
7. clad Argon prefabricated component in the middle of the continuous casting as claimed in claim 1, it is characterized in that: passage is arranged on the top of prefabricated part body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201004904U CN201997699U (en) | 2011-04-08 | 2011-04-08 | Argon blown prefabricated part for continuous casting tundish cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201004904U CN201997699U (en) | 2011-04-08 | 2011-04-08 | Argon blown prefabricated part for continuous casting tundish cover |
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| Publication Number | Publication Date |
|---|---|
| CN201997699U true CN201997699U (en) | 2011-10-05 |
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ID=44700473
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201004904U Expired - Lifetime CN201997699U (en) | 2011-04-08 | 2011-04-08 | Argon blown prefabricated part for continuous casting tundish cover |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179491A (en) * | 2011-04-08 | 2011-09-14 | 莱芜钢铁集团有限公司 | Argon-blowing prefabricated member for continuous casting tundish cover |
-
2011
- 2011-04-08 CN CN2011201004904U patent/CN201997699U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179491A (en) * | 2011-04-08 | 2011-09-14 | 莱芜钢铁集团有限公司 | Argon-blowing prefabricated member for continuous casting tundish cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20130925 |
|
| RGAV | Abandon patent right to avoid regrant |