CN204052887U - High-quality steel continuous casting protective casting device - Google Patents
High-quality steel continuous casting protective casting device Download PDFInfo
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- CN204052887U CN204052887U CN201420469402.1U CN201420469402U CN204052887U CN 204052887 U CN204052887 U CN 204052887U CN 201420469402 U CN201420469402 U CN 201420469402U CN 204052887 U CN204052887 U CN 204052887U
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- long nozzle
- river
- bellows
- clad
- lower mouth
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Abstract
High-quality steel continuous casting protective casting device belongs to molten steel casting equipment, particularly relates to a kind of for high-quality steel continuous casting protective casting device.Feature is that described iron-clad establishes elastic bellows, and bellows surrounds the lower mouth of a river, and annular asbestos seal pad is established in bellows upper end, is resisted against below ladle, relative with tapping hole; Conical asbestos seal ring is established in the lower mouth of a river and long nozzle contact site, forms elasticity argon gas secret room by long nozzle, elastic bellows, asbestos seal pad, the lower mouth of a river and asbestos seal ring.Advantage is the elasticity argon gas secret room arranging the band Ar inlet be made up of elastic bellows, asbestos seal pad, asbestos seal ring between the lower mouth of a river and long nozzle, effective prevention air contact molten steel, strengthen argon envelope and sealing effectiveness, avoid secondary oxidation of steel, guarantee that continuous casting is produced to carry out smoothly, reduce steel inclusion, improve steel quality, meet the requirement of the high cleanliness of high-quality steel.
Description
Technical field
The utility model belongs to molten steel casting equipment, particularly relates to a kind of for high-quality steel continuous casting protective casting device.
Background technology
Along with high-quality steel is continually developed, require also more and more higher to the degree of purity of steel, particularly high-quality Aluminum steel is after refining for molten steel, and inclusion content in melting steel content is very low, and therefore in casting process, the secondary oxidation of molten steel will become one of key factor affecting purity of steel.When casting, due to the design feature that the lower mouth of a river and long water gap bowl part connect together, there is a fixed gap in the end at long water gap bowl part and the lower mouth of a river, in casting cycle under the effect of high-speed steel stream, this region will produce larger negative pressure, very easily sucking air from long nozzle and junction, the lower mouth of a river causes dissolved aluminum in molten steel generation secondary oxidation, particularly Aluminum steel very easily to generate group shape Al with the oxygen reaction in air
2o
3be mingled with, directly affect Molten Steel Cleanliness and slab quality, even cause the mouth of a river to store time serious and flow disconnected watering, affect continuous casting direct motion, therefore must adopt protective casting effectively.
The continuous casting protective casting device of current employing has following several: 1) ventilative ring protection pouring device, its long water gap bowl part establishes step surface, step surface is established ventilative ring, iron-clad is established in long nozzle upper end, iron-clad establishes Ar inlet, long nozzle is established air inlet corresponding with Ar inlet, argon gas is blown in process of production in ventilative ring, prevent from sucking air, the defect existed be this device connect water change bag cleaning the rim of a bowl time, easy damage is breathed freely ring, and there is steel bonding phenomenon in bowl portion, easily cause blocking, argon envelope actual effect declines to a great extent, the as easy as rolling off a log molten steel that causes sucks air generation secondary oxidation, special in Aluminum steel, harmfulness is larger, 2) circular groove type and ring slit protective casting device, long water gap bowl part or on along one week arrange ar gas passage, the ventilative lack of homogeneity of defect long nozzle circumference existed, and circular groove type and slit device need to use together with cooperation asbestos seal pad, sealing gasket damage or long nozzle and the lower mouth of a river combine closely time, be easy to suck air generation secondary oxidation, when this external steel stream forms larger negative pressure, air can pass through sealing gasket, real protection casting effect is poor, special in Aluminum steel, more easily there is secondary oxidation of steel.
Chinese utility model patent " large bag long nozzle protective casting argon seal apparatus " (ZL201320702239.4), this device has tapered cap near end cover in the mouth of a river under large bag, will wrap greatly the lower mouth of a river and long nozzle protection tube joint portion is covered in cap.The defect existed is tapered cap lower open, argon gas skewness, and argon envelope weak effect, argon gas utilization rate is low, and cost increases.
Utility model content
In order to overcome the defect of prior art, the purpose of this utility model is to provide a kind of high-quality steel continuous casting protective casting device, reduces the secondary oxidation of molten steel, improves steel quality, guarantees continuous casting process direct motion, meet the high cleanliness requirement of high-quality steel.
High-quality steel continuous casting protective casting device, comprise ladle, the lower mouth of a river and long nozzle, the lower mouth of a river is placed in below the tapping hole of ladle, and the lower mouth of a river and long nozzle are socketed, iron-clad is established in long nozzle upper end, Ar inlet is established in iron-clad side, is characterized in described iron-clad establishes elastic bellows, and bellows surrounds the lower mouth of a river, annular asbestos seal pad is established in bellows upper end, be resisted against below ladle, relative with tapping hole, ladle and bellows contact site are sealed; Conical asbestos seal ring is established in the contact site of the lower mouth of a river and long nozzle, is sealed, and forms elasticity argon gas secret room by long nozzle, elastic bellows, asbestos seal pad, the lower mouth of a river and asbestos seal ring.During casting, applying argon gas completely seals, and when avoiding casting, molten steel sucks air at long nozzle and junction, the lower mouth of a river and is oxidized.
The utility model improves further, and described iron-clad is cylindrical, and its diameter is greater than long nozzle external diameter, and manhole is established in iron-clad upper end, and bore dia is greater than long nozzle the rim of a bowl diameter, preset clearance between iron-clad and long nozzle, ensures that argon gas can enter argon gas secret room; In iron-clad lower end, fastening is tightly embedded on long nozzle, ensures air tight.
The utility model improves further, described elastic bellows is plane along end face, upper edge and annular asbestos seal pad compact siro spinning technology, lower edge is welded on iron-clad, long nozzle the rim of a bowl diameter 20 ~ 40mm is greater than along internal diameter under bellows, outside diameter of bel is greater than long nozzle external diameter 10 ~ 30mm, and bellows high flexibility scope is long nozzle and ladle bottom distance a ± 20mm.
The utility model improves further, and described annular asbestos seal pad is annular, thickness 20 ~ 50mm, and internal diameter coordinates with the lower mouth of a river, and external diameter is greater than outside diameter of bel, and when being heated, sealing gasket expands, and strengthens the sealing effectiveness of bellows and ladle.
The utility model improves further, the size of the size of the size of described asbestos seal ring, shape and the rim of a bowl, shape and bottom, the lower mouth of a river, the corresponding cooperation of shape; Asbestos seal ring expanded by heating, strengthens the sealing effectiveness of the lower mouth of a river and long nozzle contact surface, stops further and suck air, prevent secondary oxidation of steel.
The utility model improves further, and described asbestos seal pad and asbestos seal ring add high-temperature expansion glue by fire-resistant asbestos and make, wherein by weight percentage: asbestos 30 ~ 90%, and high-temperature expansion glue 5 ~ 50%.
Compared with prior art, advantage is novel, and structure letter is gathered, rationally; The lower elasticity secret room that the band Ar inlet be made up of iron-clad, elastic bellows, asbestos seal pad, asbestos seal ring is set between the mouth of a river and long nozzle, and combine closely with ladle, argon gas consumption is few, utilization rate is high, good seal performance, strengthen argon envelope and sealing effectiveness, effective prevention air contact molten steel, avoid secondary oxidation of steel, guarantee that continuous casting is produced to carry out smoothly, improve steel quality, meet the requirement of the high cleanliness of high-quality steel, extend mouth of a river service life simultaneously, spare part expense reduces.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the structural representation of high-quality steel continuous casting protective casting device;
Fig. 2 is Als attenuation verses in Aluminum steel casting process under existing protective casting device and the utility model protective casting device;
Fig. 3 is that under existing protective casting device and the utility model protective casting device, in Aluminum steel casting process, nitrogen content increases contrast;
In figure: the mouth of a river, 6-asbestos seal pad, 7-asbestos seal ring, 8-argon gas secret room, 9-ladle under 1-long nozzle, 2-iron-clad, 3-Ar inlet, 4-elastic bellows, 5-.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is described in detail further.
As seen from Figure 1, high-quality steel continuous casting protective casting device, comprises ladle 9, the lower mouth of a river 5 and long nozzle 1, the lower mouth of a river is placed in below the tapping hole of ladle, the lower mouth of a river and long nozzle are socketed, and iron-clad 2 is established in long nozzle upper end, and Ar inlet 3 is established in iron-clad side, iron-clad is established elastic bellows 4, bellows surrounds the lower mouth of a river, and annular asbestos seal pad 6 is established in bellows upper end, is resisted against below ladle, relative with tapping hole, ladle and bellows contact site are sealed; The lower mouth of a river and long nozzle junction establish conical asbestos seal ring 7, are sealed, and form elasticity argon gas secret room 8 by long nozzle, iron-clad, elastic bellows, asbestos seal pad, the lower mouth of a river and asbestos seal ring.During casting, applying argon gas completely seals, and when avoiding casting, molten steel sucks air at long nozzle and junction, the lower mouth of a river and is oxidized.
Be it can also be seen that by Fig. 1, iron-clad 2 is cylindrical, and its diameter is greater than long nozzle external diameter, and manhole is established in iron-clad upper end, and bore dia is greater than long nozzle 1 the rim of a bowl diameter, preset clearance between iron-clad and long nozzle, ensures that argon gas can enter argon gas secret room 8; In iron-clad lower end, fastening is tightly embedded on long nozzle, ensures air tight.
Be it can also be seen that by Fig. 1, elastic bellows 4 is plane along end face, upper edge and annular asbestos seal pad 6 compact siro spinning technology, lower edge is welded on iron-clad 2, long nozzle 1 the rim of a bowl diameter 30mm is greater than along internal diameter under bellows, outside diameter of bel is greater than long nozzle external diameter 20mm, and bellows high flexibility scope is long nozzle and ladle 9 distance from bottom a ± 20mm.
Be it can also be seen that by Fig. 1, annular asbestos seal pad 6 is in annular, and thickness 30mm, internal diameter coordinates with the lower mouth of a river 5, and external diameter is greater than bellows 4 external diameter, and when being heated, sealing gasket expands, and strengthens the sealing effectiveness of bellows 4 and ladle.
Be it can also be seen that by Fig. 1, the size of the size of the size of asbestos seal ring 7, shape and the rim of a bowl, shape and bottom, the lower mouth of a river 5, the corresponding cooperation of shape, asbestos seal ring expanded by heating, strengthen the sealing effectiveness of the lower mouth of a river and long nozzle contact surface, further prevention sucks air, prevents secondary oxidation of steel.
The utility model use asbestos seal pad 6 and asbestos seal ring 7 add high-temperature expansion glue by fire-resistant asbestos and make, wherein by weight percentage: asbestos 60%, high-temperature expansion glue 40%.
This utility model device production high-quality Aluminum steel is used below for our company.
Fig. 2 and Fig. 3 is existing protective casting and protective casting device of the present utility model respectively, and in the casting process of Aluminum steel, in molten steel, Als decay and nitrogen content increase contrast.As seen from the figure; the protected effect of existing protective casting device is poor, and in casting process, there is certain Als decay and nitrogen content increase, Als decay is more than 0.004%; nitrogen content is increased in more than 10ppm, and the increase of most of heat nitrogen content is all at more than 15ppm.And protective casting device of the present utility model gets obvious protective casting effect in practice, in casting cycle, molten steel Als decays below 0.005%, and average A ls decay is 0.003%, and nitrogen pick-up controls at below 10ppm, and average nitrogen pick-up is at 3.1ppm.
Device of the present utility model plays well sealing and argon envelope effect, reduces the secondary oxidation of molten steel, improves steel quality, guarantee the normal direct motion of continuous casting process, meet the high cleanliness requirement of high-quality Aluminum steel.
Claims (5)
1. high-quality steel continuous casting protective casting device, comprise ladle (9), the lower mouth of a river (5) and long nozzle (1), the lower mouth of a river is placed in below the tapping hole of ladle, the lower mouth of a river and long nozzle are socketed, and iron-clad (2) is established in long nozzle upper end, and Ar inlet (3) is established in iron-clad side, it is characterized in that described iron-clad being established elastic bellows (4), bellows surrounds the lower mouth of a river, and bellows upper end establishes annular asbestos seal pad (6) to be resisted against below ladle, relative with tapping hole; Conical asbestos seal ring (7) is established in the contact site of the lower mouth of a river and long nozzle bellows, iron-clad and long nozzle, forms elasticity argon gas secret room (8) by long nozzle, iron-clad, bellows, asbestos seal pad, the lower mouth of a river and asbestos seal ring.
2. high-quality steel continuous casting protective casting device according to claim 1, it is characterized in that described iron-clad (2) is cylindrical, its diameter is greater than long nozzle (1) external diameter, and manhole is established in iron-clad upper end, bore dia is greater than long nozzle the rim of a bowl diameter, preset clearance between iron-clad and long nozzle; In iron-clad lower end, fastening is tightly embedded on long nozzle.
3. high-quality steel continuous casting protective casting device according to claim 1 and 2; it is characterized in that described elastic bellows (4) on be plane along end face; upper edge and annular asbestos seal pad (6) are by viscose glue compact siro spinning technology; lower edge is welded on iron-clad (2); long nozzle (1) the rim of a bowl diameter 20 ~ 40mm is greater than along internal diameter under bellows; outside diameter of bel is greater than long nozzle external diameter 10 ~ 30mm; consistent with long nozzle the rim of a bowl diameter along internal diameter on bellows, bellows high flexibility scope is long nozzle and ladle (9) distance from bottom a ± 20mm.
4. high-quality steel continuous casting protective casting device according to claim 1 and 2, it is characterized in that described annular asbestos seal pad (6) is in annular, thickness 20 ~ 50mm, internal diameter coordinates with the lower mouth of a river (5), and external diameter is greater than bellows (4) external diameter.
5. high-quality steel continuous casting protective casting device according to claim 1 and 2, is characterized in that the size of the size of described asbestos seal ring (7), shape and the rim of a bowl, the size of shape and the lower mouth of a river (5) bottom, the corresponding cooperation of shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420469402.1U CN204052887U (en) | 2014-08-20 | 2014-08-20 | High-quality steel continuous casting protective casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420469402.1U CN204052887U (en) | 2014-08-20 | 2014-08-20 | High-quality steel continuous casting protective casting device |
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| Publication Number | Publication Date |
|---|---|
| CN204052887U true CN204052887U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420469402.1U Expired - Fee Related CN204052887U (en) | 2014-08-20 | 2014-08-20 | High-quality steel continuous casting protective casting device |
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| CN (1) | CN204052887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226973A (en) * | 2014-08-20 | 2014-12-24 | 马钢(集团)控股有限公司 | Continuous casting protection casting device of high-quality steel |
-
2014
- 2014-08-20 CN CN201420469402.1U patent/CN204052887U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226973A (en) * | 2014-08-20 | 2014-12-24 | 马钢(集团)控股有限公司 | Continuous casting protection casting device of high-quality steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20210820 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |