CN201735775U - Air blow device at bottom of tundish - Google Patents
Air blow device at bottom of tundish Download PDFInfo
- Publication number
- CN201735775U CN201735775U CN2010202447835U CN201020244783U CN201735775U CN 201735775 U CN201735775 U CN 201735775U CN 2010202447835 U CN2010202447835 U CN 2010202447835U CN 201020244783 U CN201020244783 U CN 201020244783U CN 201735775 U CN201735775 U CN 201735775U
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- air
- tundish
- molten steel
- refractory
- refractory brick
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model provides an air blow device at the bottom of a tundish. The air blow device consists of a refractory brick and an air supply pipe and is characterized in that the upper part and the lower part and two ends of the refractory brick are made from compact refractory materials; the middle of the refractory brick is embedded with air permeable refractory material; the middle of the air permeable refractory material is provided with an air collection chamber along the axial direction; and the air supply pipe is led in from one end to be communicated with the air collection chamber. The air blow device is simple in structure and reasonable in design, and adopts a way of discharging air at two side surfaces to form two air bubbles at the side surfaces, and the two air bubbles intensively float upwards to form an air bubble screen with certain thickness, thus enhancing the capability of driving the molten steel to flow upwards, reducing or eradicating a dead zone in the tundish, prolonging the retention time of the molten steel, further promoting the uniformness of the molten steel with respect to the ingredient and temperature in the tundish and effectively removing the impurities in steel.
Description
Technical field
The utility model belongs to the continuous casting technology field, relates in particular to a kind of blowning installation that is used for continuous casting tundish bottom.
Background technology
Along with the requirement to steel quality is more and more stricter, in order to remove steel inclusion, smelting obtains purifying of steel, and people have adopted multiple physics and chemical means.Wherein be blown into inert gas, utilize collision, the adhesion of bubble and field trash, promote that inclusion floating is a kind of comparatively desirable method to molten steel.Present useful air brick, porous plug etc. are blown into inert gas to ladle, tundish etc., and the micro-bubble of generation can effectively promote the homogenising of molten steel component and temperature, remove steel inclusion.The tundish Argon not only can strengthen stirring, and can clean molten steel with the bubble of inertia.The main mode of tundish Argon is to be blown into micro-bubble in certain position, tundish bottom by porous brick or porous argon pipe.Experimental study shows that the variation of blow-out position, stomatal number and air-blowing quantity can produce very big influence to the tundish fluid flow regime.
Application number is the method that the Chinese patent of CN200910062737.5 relates to a kind of continuous casting tundish air curtain retaining wall clean molten steel, this technology embeds air brick in the permanent layer of tundish bottom, air brick to go up ventilative face concordant or slightly exceed the working lining that build by laying bricks or stones the tundish bottom, helping field trash collision grows up and is excluded, can improve the molten steel flow behavior and get rid of small non-metallic inclusion, improve the molten steel degree of purity effectively.
Application number provides a kind of steel-making continuous casting tundish air blowing type retaining dam for the Chinese patent of CN200520142243.5, on being installed at the bottom of the bag between barricade and the middle water containing opening, can play retaining dam change molten steel flow field and argon gas simultaneously and stir the double action that molten steel is removed the molten steel field trash, being applicable to needs blowing argon gas to stir molten steel to reduce the continuous casting tundish of molten steel inclusion content, raising molten steel cleanliness factor.
But the described technical scheme of above-mentioned patent all is to utilize the air brick upper surface to blow out argon gas, by the molten steel in the come-up kinetic energy stirring tundish of bubble, to reduce the molten steel inclusion content.Adopt the method for air brick end face blow gas, because the surface is subjected to the influence of air brick gas cell distribution and material, bubble is sparse, thus bubble floating drive ability that molten steel upwards flows a little less than.
The utility model content
The purpose of this utility model is to overcome the deficiency that above-mentioned prior art exists, and a kind of device that can blow from the air brick both sides in the tundish bottom that is used for is provided.
The utility model is achieved in that the blowning installation of this tundish bottom is made up of refractory brick and air supply pipe.Upper and lower and the two ends of described refractory brick are the compactness refractory material, and the centre studs with air permeability refractory materials, have collection chamber vertically at the middle part of air permeability refractory materials, and air supply pipe is imported by an end and communicates with collection chamber.
The angle α of ventilative face in the both sides of refractory brick described in the utility model and bottom surface is 70～85 °, makes the air curtain of its come-up that certain thickness be arranged; On the compactness refractory material of blowning installation bottom, laterally have 2～3 grooves.
The utility model is simple in structure, reasonable in design, the mode that adopts both sides to give vent to anger, form two intensive upwards floating of bubble in the side certain thickness air curtain is arranged, greatly strengthened to drive the ability that molten steel upwards flows, reduced or eliminated dead band in the tundish, prolonged the holdup time of molten steel, thereby molten steel component and temperature is even in the promotion tundish, removes in the steel effectively to be mingled with.The groove that blowning installation bottom, back is installed forms through hole, makes things convenient for molten steel to flow out, and can reduce the residual steel amount after the basket pouring.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model blowning installation.
Accompanying drawing 2 is the A-A view of accompanying drawing 1.
Accompanying drawing 3 is the user mode schematic diagram of the utility model blowning installation.
Accompanying drawing 4 is the B-B view of accompanying drawing 3.
Among the figure: 1 is turbulator, and 2 is long nozzle, and 3 is blowning installation, and 3-1 is a dense material, and 3-2 is a gas permeable material, and 3-3 is an air supply pipe, and 3-4 is a groove, and 3-5 is a collection chamber, and 4 is submersed nozzle, and 5 is tundish, and 5-1 is a working lining, and 5-2 is a permanent layer.
The specific embodiment
The utility model will be further described with reference to the accompanying drawings.
From attached Fig. 1 and 2 as can be seen the utility model blowning installation 3 mainly formed by refractory brick and air supply pipe 3-3.Upper and lower and the two ends of refractory brick are compactness refractory material 3-1, and the centre studs with diffusivity breathable refractory materials 3-2, have collection chamber 3-5 vertically at the middle part of air permeability refractory materials, and the end of collection chamber 3-5 communicates with external air source by air supply pipe 3-3.According to the characteristics of bottom blowing bubble floating drive MOLTEN STEEL FLOW, the utility model by blowning installation 3, also is that the both sides of refractory brick are ventilative by gas permeable material 3-2, and the angle α design of ventilative face and bottom surface is in 70～85 ° of scopes, as shown in Figure 2.
The utility model blowning installation 3 is applicable to polytype continuous casting tundish.During installation refractory brick built by laying bricks or stones in tundish 5 on the permanent layer 5-2 between the long nozzle 2 and submersed nozzle 4, air supply pipe 3-3 is close to permanent layer 5-2 surface and is provided with, and covers with working lining 5-1, sees also accompanying drawing 3 and 4.After building (spraying) working lining 5-1 by laying bricks or stones, require the bottom of the side (ventilative face) of refractory brick to be higher than working lining surface 100～120mm.After building by laying bricks or stones, groove 3-4 (among the figure 2) through hole that forms is of a size of 70 * 90mm, as shown in Figure 4.Form through hole in the refractory brick bottom and can make things convenient for molten steel to flow out, with the residual steel amount after the minimizing basket pouring.In the tundish casting process, be blown into inert gas (argon gas) towards tundish 5, just form two air curtain bands that bubble is intensive by the disperse of blowning installation 3 both sides is ventilative.
Claims (3)
1. tundish bottom blowing device, formed by refractory brick and air supply pipe, upper and lower and the two ends that it is characterized in that described refractory brick are the compactness refractory material, the centre studs with air permeability refractory materials, middle part at air permeability refractory materials has collection chamber vertically, and air supply pipe is imported by an end and communicates with collection chamber.
2. bottom blowing device according to claim 1 is characterized in that the ventilative face in both sides of described refractory brick and the angle α of bottom surface are 70～85 °.
3. bottom blowing device according to claim 1 and 2 is characterized in that laterally having 2～3 grooves on the compactness refractory material of described refractory brick bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202447835U CN201735775U (en) | 2010-06-29 | 2010-06-29 | Air blow device at bottom of tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202447835U CN201735775U (en) | 2010-06-29 | 2010-06-29 | Air blow device at bottom of tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201735775U true CN201735775U (en) | 2011-02-09 |
Family
ID=43551057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202447835U Expired - Fee Related CN201735775U (en) | 2010-06-29 | 2010-06-29 | Air blow device at bottom of tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201735775U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966577A (en) * | 2010-10-19 | 2011-02-09 | 维苏威高级陶瓷(苏州)有限公司 | Novel continuous casting tundish |
| CN105598428A (en) * | 2016-02-24 | 2016-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Double-layer air curtain retaining wall and manufacturing method thereof |
| CN114101649A (en) * | 2021-12-06 | 2022-03-01 | 中冶南方连铸技术工程有限责任公司 | Double-bottom tundish with ventilation structure |
-
2010
- 2010-06-29 CN CN2010202447835U patent/CN201735775U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966577A (en) * | 2010-10-19 | 2011-02-09 | 维苏威高级陶瓷(苏州)有限公司 | Novel continuous casting tundish |
| CN105598428A (en) * | 2016-02-24 | 2016-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Double-layer air curtain retaining wall and manufacturing method thereof |
| CN114101649A (en) * | 2021-12-06 | 2022-03-01 | 中冶南方连铸技术工程有限责任公司 | Double-bottom tundish with ventilation structure |
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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: 20110209 Termination date: 20160629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |