CN202527694U - Tundish structure capable of reducing blank casting inclusions - Google Patents
Tundish structure capable of reducing blank casting inclusions Download PDFInfo
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- CN202527694U CN202527694U CN2012200531312U CN201220053131U CN202527694U CN 202527694 U CN202527694 U CN 202527694U CN 2012200531312 U CN2012200531312 U CN 2012200531312U CN 201220053131 U CN201220053131 U CN 201220053131U CN 202527694 U CN202527694 U CN 202527694U
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- tundish
- brick cup
- submersed nozzle
- river
- mouth
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Abstract
The utility model relates to a tundish structure capable of reducing blank casting inclusions. The structure comprises a tundish lining enclosing a tundish inner cavity, a submersed nozzle and a stopper, wherein the tundish lining comprises a wall face and a bottom, and the upper end of the submersed nozzle is connected with the bottom of the tundish lining and stretches into the tundish inner cavity through a bottom outlet; second seating bricks are paved on the periphery of the nozzle, and the upper edge of the nozzle is higher than upper surfaces of the second seating bricks; lower surfaces of the second seating bricks are parallel with the lower surface of the bottom, upper surfaces are lower than the upper surface of the bottom of the tundish lining, and the upper surfaces of the second seating bricks are connected with the upper surface of the bottom through an inclined plane; the height of the upper edge of the submersed nozzle is not higher than the that of the upper surface of the bottom of the tundish lining, and the stopper capable of regulating the opening of the nozzle is arranged above the submersed nozzle. According to the structure, inclusion absorbed and deposited at the bottom of the tundish lining and fallen fire-resistant materials are effectively prevented from entering a downstream crystallizer, nonmetallic inclusions in casting blanks are reduced obviously, the quality and the usage effect of finally produced steel are improved.
Description
Technical field
The utility model belongs to the continuous casting technical field of steel, relates in particular to the structure of continuous casting tundish inner control Molten Steel Flow.
Background technology
In order to be delivered to the molten steel after the refining in the crystallizer of conticaster by ladle; And the continuous pouring solidification forming of realization molten steel; Between the crystallizer that the ladle of transportation of molten steel and molten steel cooled and solidified are shaped, adopted an intermediate receptacle that is called tundish; The long nozzle of processing through refractory material above the tundish is communicated with the transhipment ladle bottom, and the submersed nozzle made from refractory material below stretches into the crystallizer the inside, realizes the continuous conveying from top to bottom of molten steel; Playing the critical function of forming a connecting link, is casting process is converted into the continous way operation by intermittent operation linking point.
At the initial stage of continuous casting technology development, tundish just uses as the memory and the distributor of molten steel, as long as middle water containing opening does not freeze, can pour into a mould smoothly, just can meet the demands.Composition and degree of purity as to molten steel have requirement, always in the melting at the upper reaches and refining, seek redress; And take place at need when the continuous casting process aspect, search reason in the conticaster in the downstream of arriving.But along with the development and progress of continuous casting technology, the molten steel quality is familiar with by people the significance of continuous casting process gradually.Carry out the continuous pouring with many stoves molten steel smoothly for what guarantee casting process; Molten steel in the casting process must guarantee certain degree of purity; The molten steel component scope will as far as possible accurately be controlled; The molten steel temperature and the degree of superheat will keep stable in the long time, and therefore, the effect of tundish metallurgy and status have received more attention.Present viewpoint thinks that the metallurgy action of tundish generally comprises following several respects: 1) connect the effect of watering; When the continuous pouring of many stoves, the molten steel of tundish storage can play the effect of linking when the conversion ladle.2) shunting action; For multiple-strand caster, can a plurality of mouths of a river be installed in the tundish bottom molten steel is shunted, the realization multithread is poured into a mould simultaneously.3) decompression and pressure stabilization function; Compare with direct employing steel ladle pouring, the tundish liquid level is lower, can reduce ferrostatic pressure, thereby alleviates molten steel washing away initial solidification shell; Simultaneously, the tundish liquid level can keep relative stability, and avoids liquid level constantly to change the influence to slab quality.4) cleaning molten steel; Through in the inner methods such as flow control device or filter of installing of tundish, remove the field trash in the molten steel, improve the molten steel degree of purity.5) regulate liquid steel temperature and composition; Through in tundish, adding technology such as alloy or heating, the composition that makes molten steel rationally, temperature stabilization and evenly.
Because people are to the requirement strictness day by day of the mechanical property and the chemical composition of steel; Just need further to improve the degree of purity of molten steel, therefore, the effect of tundish cleaning molten steel, removal non-metallic inclusion is highlighted gradually; In five metallurgy actions of above-mentioned tundish; Cleaning molten steel can be thought the most important metallurgy action of tundish, also is the emphasis and the focus of tundish metallurgy technical research, still is the key factor that the tundish design will be considered simultaneously.Use at present more method be in tundish, install flow control device prolong molten steel the time of staying, or to adopt deep molten bath and jumbo tundish etc., its main starting point all be in order effectively to remove the field trash in the molten steel.
Under the prior art, the continuous casting tundish be up big and down small a, liner pile up with refractory material form, molten steel transition container that the outside has box hat to support.The tundish the inside is incorporated into oral region and outlet area, and the inlet region is the zone that molten steel ladle passes through the long nozzle cast, is also referred to as the beam district; Outlet area is the zone that tundish bottom steel flow goes out; One or more outlet can be arranged at the tundish bottom; The exit has generally been installed submersed nozzle and has been come transportation of molten steel in crystallizer; Guaranteeing molten steel not by the air secondary oxidation, around the submersed nozzle upper edge place mat brick cup of making by the higher refractory material of intensity.The top of the submersed nozzle that install the tundish bottom generally will be installed stopper or slide plate is set, and need control the flow of tundish transportation of molten steel in crystallizer during actual the cast through stopper or slide plate.The brick cup of place mat basically all is at grade around bottom surface, submersed nozzle upper edge and the mouth of a river of tradition tundish; Will make the non-metallic inclusion of tundish bottom surface absorption deposition go like this with the stream thigh inspiration that the refractory material that comes off is very easy to be dipped in the formula mouth of a river; And get in the crystallizer in downstream, thereby cause the mechanical property of the reduction of strand degree of purity, final steel and result of use to worsen.
The utility model content
The technical problem that the utility model will solve is the above-mentioned deficiency to continuous casting tundish structure under the prior art; A kind of tundish structure of reduced casting blank foreign matter newly is provided, can obviously reduces the mechanical property that gets into the The amount of inclusions in the crystallizer, the degree of purity that improves molten steel, enhancing finished steel from tundish.
For solving the problems of the technologies described above, the utility model adopts following technical solution:
A kind of tundish structure that reduces casting blank foreign matter; Mainly comprise the tundish liner, submersed nozzle and the stopper that surround the tundish inner chamber; Wherein, the tundish liner mainly comprises wall and bottom, and the submersed nozzle upper end links to each other with the bottom and stretches in the tundish inner chamber through outlet at bottom; It is characterized in that: place mat second brick cup around the mouth of a river, upper edge, the mouth of a river is higher than the second brick cup upper surface; The second brick cup lower surface and upper surface concordant with the bottom lower surface is lower than the tundish upper base surface, links to each other with the inclined-plane between the second brick cup upper surface and the upper base surface; The upper edge height of said submersed nozzle is not higher than the height of tundish upper base surface; The stopper of scalable mouth of a river aperture is set directly over the submersed nozzle.
The difference in height of said second brick cup upper surface and tundish upper base surface is 5～50mm; The submersed nozzle upper edge and the second brick cup upper level difference are 5～50mm; Be that 20 °～60 ° inclined-plane links to each other with the inclination angle between the second brick cup upper surface and the upper base surface.
Place mat first brick cup constitutes mouth of a river wall around the upper edge at the mouth of a river.
Said submersed nozzle is the elongated cylinder of hollow, and its upper edge wall is the annular plane.
Slit filling fire resisting material between said second brick cup and the mouth of a river.
The said second brick cup place mat be shaped as rectangle or circle, and be the center with the mouth of a river.
The said mouth of a river and brick cup are by the refractory material hydrostatic pressing.
The liner of said tundish inner chamber is to be piled up by refractory material to form.
The utility model has following characteristics with respect to prior art:
1 through the adjustment to traditional tundish polycrystalline substance; Can effectively stop the field trash of tundish bottom absorption deposition to get in the crystallizer in downstream with the refractory material that comes off; Can obviously reduce the non-metallic inclusion in the strand, improve the quality and the result of use of final production steel.
2 tundish structure designs are very simple, and involved parts are made more convenient, and simultaneously, its applicability and operability are all more intense.
Description of drawings
Fig. 1 is the structural representation of tundish structure of an embodiment of the utility model.
Label is following in the accompanying drawing, 1-tundish liner, 2-wall, 3-bottom, 4-second brick cup, 5-submersed nozzle, 6-stopper
The specific embodiment
The utility model is described further with embodiment below in conjunction with accompanying drawing 1, but does not limit the utility model.
As shown in fig. 1; A kind of tundish structure that reduces casting blank foreign matter according to the utility model is implemented mainly comprises the tundish liner 1, submersed nozzle 5 and the stopper 6 that surround the tundish inner chamber, and wherein tundish liner 1 mainly comprises wall 2 and bottom 3 again; On the bottom 3 outlet is set; Submersed nozzle 5 upper ends link to each other with the outlet of bottom 3 and stretch in the tundish inner chamber, place mat first brick cup around the upper edge of submersed nozzle 5, place mat second brick cup 4 around the mouth of a river 5; The height of said second brick cup, 4 upper surfaces is lower than tundish bottom 3 upper surfaces, and its difference in height is 5～50mm, is that 20 °～60 ° inclined-plane links to each other with the inclination angle between second brick cup, 4 upper surfaces and bottom 3 upper surfaces.The upper edge height of said submersed nozzle 5 is not higher than the height of tundish bottom 3 upper surfaces, can reduce the residual volume of final molten steel like this, improves the recovery rate of metal.Be provided with stopper 6 directly over the submersed nozzle 5, control submersed nozzle 5 opening degree suitable for reading through the vertical height of regulating stopper 6 during cast, thereby realize control the molten steel flow.
Said brick cup 4 can the place mat rectangularity or is circular, and is the center with submersed nozzle 5.
Said tundish liner 1 is piled up by refractory material and is formed, said second brick cup 4, submersed nozzle 5 and stopper 6 all be by different refractory materials through hydrostatic pressing, these structures and parts have carried out number of applications at the scene, and respond well.Said submersed nozzle 5 is the cylindrical tube of hollow; On it stopper 6 lower end heads of position are that cone, the upper end of rounding off is cylinder, can stretch into the opening degree that stroke in the opening of submersed nozzle 5 is controlled submersed nozzle 5 through stopper 6 lower ends.
Between the said submersed nozzle 5 and second brick cup 4 if any the slit; Then with the refractory material padding and compacting; Submersed nozzle 5 upper edges are higher than mouth of a river brick cup 4 upper surfaces of place mat all around; The zone of reasonableness of its difference in height is 5～50mm, and the stream plume that can make the tundish bottom like this receives stopping of submersed nozzle 5 upper end walls in the time of the outlet of submersed nozzle 5, and the stream thigh that the refractory material that is mingled with or comes off that effectively prevents the absorption of tundish bottom is dipped into 5 outlets of the formula mouth of a river sucks.
Embodiment 1
A kind of tundish structure that reduces casting blank foreign matter, tundish walls 2 is to pile up the liner that forms by refractory material with bottom 3, middle inner cavity branch comprises an inlet region and an outlet area.Outlet area has been installed a submersed nozzle 5, the bottom surface place mat around the submersed nozzle 5 high-intensity fire-resistant second brick cup 4, submersed nozzle 5 tops are provided with stopper 6 and control the molten steel flow.Submersed nozzle 5 upper edges exceed 20mm than brick cup 4, and second brick cup 4 hangs down 20mm than tundish bottom 3 upper surfaces all around, and brick cup 4 links to each other with 30 ° of inclined-planes between 3 upper surfaces bottom tundish.At casting process; In the molten steel of bag bottom when flowing to submersed nozzle 5, receive stopping of the mouth of a river upper end wall that stretches out plane, brick cup 4 place; Therefore the field trash of tundish bottom absorption deposition can only rest on plane, brick cup 4 place or come-up with the refractory material that comes off, and can not get in the crystallizer in downstream and endangers slab quality.In cast at the end, because submersed nozzle 5 upper edges are equal with tundish bottom 3 upper surfaces, therefore have only plane, lower brick cup 4 place, position to locate residual a spot of molten steel that has, overall recovery rate of iron is higher.
The above disclosed preferred embodiment that is merely the utility model; Certainly can not limit the interest field of the utility model with this; Therefore the equivalence of being done according to the utility model claim changes, the protection domain that still belongs to the utility model like change that technological parameter or device are made and improvement.
Claims (8)
1. tundish structure that can reduce casting blank foreign matter; Mainly comprise the tundish liner, submersed nozzle and the stopper that surround the tundish inner chamber; Wherein, the tundish liner mainly comprises wall and bottom, and the submersed nozzle upper end links to each other with the bottom and stretches in the tundish inner chamber through outlet at bottom; It is characterized in that: place mat second brick cup around the mouth of a river, upper edge, the mouth of a river is higher than the second brick cup upper surface; The second brick cup lower surface and upper surface concordant with the bottom lower surface is lower than the tundish upper base surface, links to each other with the inclined-plane between the second brick cup upper surface and the upper base surface; The upper edge height of said submersed nozzle is not higher than the height of tundish upper base surface; The stopper of scalable mouth of a river aperture is set directly over the submersed nozzle.
2. tundish structure according to claim 1 is characterized in that: the difference in height of said second brick cup upper surface and tundish upper base surface is 5～50mm; The submersed nozzle upper edge and the second brick cup upper level difference are 5～50mm; Be that 20 °～60 ° inclined-plane links to each other with the inclination angle between the second brick cup upper surface and the upper base surface.
3. tundish structure according to claim 1 and 2 is characterized in that: place mat first brick cup constitutes mouth of a river wall around the upper edge at the mouth of a river.
4. tundish structure according to claim 3 is characterized in that: said submersed nozzle is the elongated cylinder of hollow, and its upper edge wall is the annular plane.
5. according to claim 1 or 2 or 4 described tundish structures, it is characterized in that: slit filling fire resisting material between said second brick cup and the mouth of a river.
6. tundish structure according to claim 5 is characterized in that: the said second brick cup place mat be shaped as rectangle or circle, and be the center with the mouth of a river.
7. according to claim 1 or 2 or 4 or 6 described tundish structures, it is characterized in that: the said mouth of a river and brick cup are by the refractory material hydrostatic pressing.
8. tundish structure according to claim 7 is characterized in that: the liner of said tundish inner chamber is to be piled up by refractory material to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200531312U CN202527694U (en) | 2012-02-17 | 2012-02-17 | Tundish structure capable of reducing blank casting inclusions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200531312U CN202527694U (en) | 2012-02-17 | 2012-02-17 | Tundish structure capable of reducing blank casting inclusions |
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| Publication Number | Publication Date |
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| CN202527694U true CN202527694U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200531312U Expired - Fee Related CN202527694U (en) | 2012-02-17 | 2012-02-17 | Tundish structure capable of reducing blank casting inclusions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554206A (en) * | 2012-02-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Tundish structure capable of decreasing casting blank inclusions |
| CN103273053A (en) * | 2013-06-13 | 2013-09-04 | 济钢集团有限公司 | Tundish composite flow control process for slab continuous casting machine and equipment of tundish composite flow control process |
| CN114406216A (en) * | 2021-12-30 | 2022-04-29 | 河北敬业高品钢科技有限公司 | Double-roller thin-strip continuous casting flow distributor transition device and construction method thereof |
-
2012
- 2012-02-17 CN CN2012200531312U patent/CN202527694U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554206A (en) * | 2012-02-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Tundish structure capable of decreasing casting blank inclusions |
| CN103273053A (en) * | 2013-06-13 | 2013-09-04 | 济钢集团有限公司 | Tundish composite flow control process for slab continuous casting machine and equipment of tundish composite flow control process |
| CN103273053B (en) * | 2013-06-13 | 2016-02-03 | 济钢集团有限公司 | A kind of slab caster tundish compound flow control Processes and apparatus |
| CN114406216A (en) * | 2021-12-30 | 2022-04-29 | 河北敬业高品钢科技有限公司 | Double-roller thin-strip continuous casting flow distributor transition device and construction method thereof |
| CN114406216B (en) * | 2021-12-30 | 2024-05-31 | 河北敬业高品钢科技有限公司 | Transition device of double-roller thin-belt continuous casting flow distributor and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20140217 |