CN201442094U - Submerged nozzle with inner wall having composite bed for continuously casting sheet billet - Google Patents
Submerged nozzle with inner wall having composite bed for continuously casting sheet billet Download PDFInfo
- Publication number
- CN201442094U CN201442094U CN2008202214043U CN200820221404U CN201442094U CN 201442094 U CN201442094 U CN 201442094U CN 2008202214043 U CN2008202214043 U CN 2008202214043U CN 200820221404 U CN200820221404 U CN 200820221404U CN 201442094 U CN201442094 U CN 201442094U
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- composite bed
- submerged nozzle
- nozzle
- wall
- continuous casting
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Abstract
The utility model belongs to a submerged nozzle for continuously casting a sheet billet, and provides a submerged nozzle with inner wall having composite bed for continuously casting a sheet billet, which is characterized in that the inlet end is of a circular shape, and the outlet end is of a flat structure; the surface on the inner wall of the nozzle is provided with a composite bed with the thickness of 4 to 8 mm, the composite bed is made of magnesium aluminate spinel, alumina or the combination of the magnesium aluminate spinel and the alumina in any proportion, and the sum of the content of the magnesia and the alumina is more than or equal to 94 percent. The ratio of the composite bed on the inner wall of the nozzle is more than or equal to 85 percent. The submerged nozzle with inner wall having composite bed for continuously casting a sheet billet not only can prevent the stoppage and can prevent the submerged nozzle from dropping into the liquid steel to cause the non-metal foreign matter, also can prevent the increase of Si and C of the liquid steel, and has positive significance on ensuring the continuity of the casting and the improving the quality of the steel billet.
Description
Technical field
The utility model belongs to the continuous casting technology field, relates generally to the submerged nozzle for continuous casting of thin slabs that a kind of inwall has composite bed, and steel grades such as silicon steel, aluminum killed steel are specially adapted to cast.
Background technology
In the continuous casting process of molten steel, submersed nozzle imports molten steel in the crystallizer by tundish, and except having the effect that prevents molten steel oxidation, main is control and improves the flow regime of molten steel in crystallizer.General submerged nozzle for continuous casting of thin slabs is to be primary raw material with corundum or zirconia, graphite, and is added with a spot of vitreous silica, SiC and metal Si etc., has good thermal shock resistance and anti-molten steel scouring.But this mouth of a river is when cast aluminum killed steel, Al in the Chang Yingang liquid
2O
3Be deposited on mouth of a river inwall and spue outside the hole and stop up Deng field trash, have influence on working continuously of continuous casting.Stick to mouth of a river inner surface simultaneously and the field trash at the place, hole that spues, in casting cycle, may come off and fall in the molten steel, cause the nonmetal thing in the continuous casting billet to be mingled with, thereby influence the quality of continuous casting steel billet.When the contour quality steel of casting silicon steel, C in the submersed nozzle and Si are dissolved in the molten steel easily in addition, increase the content of C and Si in the molten steel, and the quality of strand is affected.
At present China's sheet blank continuous casting has had large development, built up ten surplus a production line.Domesticly developed supporting with it multiple submersed nozzle, as publication number is CN91227348.8, CN92223447.7, CN200410060353.7, CN200420090590.3, CN99204644.0, CN200720011852, the submerged nozzle for continuous casting of thin slabs that proposes in the patent applications such as CN200720012995, but the submersed nozzle that they proposed only relates to the content of configuration aspects.
Common immersion water gap for continuously casting endoporus is the structure of straight-through circular hole.For guaranteeing higher thermal shock resistance and corrosion resistance, common submerged nozzle for continuous casting of thin slabs material therefor is a carbon composite, but when contacting with molten steel, graphite in the carbon composite easily is dissolved into and causes molten steel recarburization and submersed nozzle inner wall coarse in the molten steel, field trash in the molten steel is easily attached on the coarse mouth of a river inwall, along with the enrichment of attachment, cause that easily nozzle blocking and the rich tamper that amasss on the inwall of the mouth of a river fall into the nonmetal thing that molten steel causes steel billet and be mingled with; For improving thermal shock resistance, can introduce certain siliceous material in the carbon composite usually in addition, in use siliceous material easily is dissolved in the molten steel, causes the silicon that increases to molten steel to pollute, and is unfavorable for the smelting of high-quality steel grade.
Summary of the invention
The purpose of this utility model is to propose the submerged nozzle for continuous casting of thin slabs that a kind of inwall has composite bed, can prevent to stop up and the rich tamper that amasss on the inwall of the mouth of a river is fallen into the nonmetal thing inclusion defect that molten steel causes steel billet, but also can avoid molten steel is increased Si and increases the C pollution, make it have positive effect to the continuity of assurance casting and the raising of billet quality.
The purpose of this utility model can adopt following technical scheme to realize: a kind of inwall has the submerged nozzle for continuous casting of thin slabs of composite bed, and its arrival end is a flat structure for circular, the port of export; Mouth of a river inner wall surface has the composite bed of 4-8mm thickness.
Described composite bed material is magnesium aluminate spinel, aluminium oxide or the arbitrary proportion of the two combination, content sum 〉=94% of magnesia and aluminium oxide.
Its inwall of described submerged nozzle for continuous casting of thin slabs has ratio 〉=85% of composite bed.
Be the characteristics of adaptation crystallizer for continuous casting of thin slabs, and satisfy the demand of high efficiency continuous casting that it is that circle, the port of export are flat structure that the utility model submerged nozzle for continuous casting of thin slabs is taked arrival end; The utility model in use can not cause molten steel to increase silicon, carburetting pollution by at compound one deck magnesium aluminate spinel of submerged nozzle for continuous casting of thin slabs inwall or aluminum oxide material; In addition because there is not the disappearance of graphite, the submersed nozzle inner wall smooth, field trash is difficult for attached to mouth of a river inwall, to avoiding stopping up positive meaning.
Description of drawings
Fig. 1 is the utility model gate structure schematic diagram.
Fig. 2 is the A-A view of Fig. 1.
Among the figure, 1, submersed nozzle, 2, composite bed.
The specific embodiment
In conjunction with the accompanying drawing that provides, embodiment is specified to the utility model.
As shown in Figure 1, submerged nozzle for continuous casting of thin slabs 1, its arrival end is a flat structure for circular, the port of export; Mouth of a river inner wall surface has the composite bed 2 of aluminium oxide and magnesium aluminate spinel formation; The thickness of composite bed 2 is 4mm, by resin-bonded.The compositely proportional of submerged nozzle for continuous casting of thin slabs inwall is 100%, and aluminium oxide and content of magnesia sum are 94% in the surface composite layer.Form the submersed nozzle of liner composite carbon after the Low Temperature Heat Treatment in conjunction with dimension stone of magnesia alumina spinel.In the post-processed process of submersed nozzle, do not brush antioxidizing paint.With the oxidation of coal in the liner, final formation in use has the sheet billet submersed nozzle of the carbon-free inner lining material of no silicon in the use bake process in early stage at the mouth of a river.
As shown in Figure 1, submerged nozzle for continuous casting of thin slabs 1, its arrival end is a flat structure for circular, the port of export; Mouth of a river inner wall surface has the composite bed 2 of aluminum oxide; The thickness of composite bed 2 is 8mm, by resin-bonded.The submersed nozzle arrival end does not participate in compound, and the inwall compositely proportional is 90%, and alumina content is 96% in the surface composite layer.Form the submersed nozzle of liner composite carbon combined aluminum oxide material after the Low Temperature Heat Treatment.In the post-processed process of submersed nozzle, do not brush antioxidizing paint.The mouth of a river is intact with the oxidation of coal in the liner in the use bake process in early stage, the final sheet billet submersed nozzle with the carbon-free inner lining material of no silicon that forms in use.
Embodiment 3
As shown in Figure 1, the arrival end of submerged nozzle for continuous casting of thin slabs 1 is a flat structure for circular, the port of export; The resin-bonded material that the even compound layer thickness of submerged nozzle for continuous casting of thin slabs 1 inner wall surface is 6mm, the weight of aluminium oxide and magnesium aluminate spinel respectively accounts for 50% in the material, submersed nozzle arrival end and channelizing island do not participate in compound, the inwall compositely proportional is 85%, and aluminium oxide and content of magnesia sum are 94%.Form the submersed nozzle of liner composite carbon combined aluminum oxide material after the Low Temperature Heat Treatment.In the post-processed process of submersed nozzle, do not brush antioxidizing paint.The mouth of a river is intact with the oxidation of coal in the liner in the use bake process in early stage, the final sheet billet submersed nozzle with the carbon-free inner lining material of no silicon that forms in use.
Claims (2)
1. an inwall has the submerged nozzle for continuous casting of thin slabs of composite bed, it is characterized in that: the arrival end of described submerged nozzle for continuous casting of thin slabs is a flat structure for circular, the port of export; It is 4mm that mouth of a river inner wall surface has thickness---the composite bed (2) of 8mm.
2. a kind of inwall according to claim 1 has the submerged nozzle for continuous casting of thin slabs of composite bed, it is characterized in that: described submerged nozzle for continuous casting of thin slabs (1) inwall has ratio 〉=85% of composite bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202214043U CN201442094U (en) | 2008-11-28 | 2008-11-28 | Submerged nozzle with inner wall having composite bed for continuously casting sheet billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202214043U CN201442094U (en) | 2008-11-28 | 2008-11-28 | Submerged nozzle with inner wall having composite bed for continuously casting sheet billet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201442094U true CN201442094U (en) | 2010-04-28 |
Family
ID=42546769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008202214043U Expired - Lifetime CN201442094U (en) | 2008-11-28 | 2008-11-28 | Submerged nozzle with inner wall having composite bed for continuously casting sheet billet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201442094U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856693A (en) * | 2017-05-15 | 2018-11-23 | 维苏威美国公司 | The asymmetric slab mouth of a river |
-
2008
- 2008-11-28 CN CN2008202214043U patent/CN201442094U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856693A (en) * | 2017-05-15 | 2018-11-23 | 维苏威美国公司 | The asymmetric slab mouth of a river |
| US11103921B2 (en) | 2017-05-15 | 2021-08-31 | Vesuvius U S A Corporation | Asymmetric slab nozzle and metallurgical assembly for casting metal including it |
| CN108856693B (en) * | 2017-05-15 | 2022-04-29 | 维苏威高级陶瓷(中国)有限公司 | Asymmetric slab gate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100428 |