CN201620177U - Composite porous brick - Google Patents
Composite porous brick Download PDFInfo
- Publication number
- CN201620177U CN201620177U CN 200920249894 CN200920249894U CN201620177U CN 201620177 U CN201620177 U CN 201620177U CN 200920249894 CN200920249894 CN 200920249894 CN 200920249894 U CN200920249894 U CN 200920249894U CN 201620177 U CN201620177 U CN 201620177U
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- gas permeable
- permeable brick
- porous brick
- brick
- type gas
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model discloses a composite porous brick for refining, which can efficiently remove impurities in molten steel. The composite porous brick comprises two parts: the upper part is a machine-molded diffusion type porous brick with uniformly distributed small-aperture pores, and the lower part is a non-diffusion type porous brick with good permeability; a gas chamber exists between the upper and the lower porous bricks, the upper and the lower porous bricks are connected together by snap fasteners, and the outside of the whole porous brick is wrapped by steel jacket for fixation. The composite porous brick has the advantage that the jetted argon passes through the upper diffusion type porous brick to form a large quantity of small-diameter bubbles, so the composite porous brick has more excellent performance for removing impurities in molten steel. Since the diffusion type porous brick is one part of the whole porous brick, the composite porous brick overcomes the defect that a large-sized diffusion type porous brick can hardly be molded and has low gas permeability.
Description
Technical field
The present invention relates to a kind of steel-making refining air brick of steel ladle, particularly a kind of composite air bricks that in refining high quality variety steel process, has efficient removal inclusion ability.
Background technology
The existence of inclusion is the principal element of harm steel product quality, so the inclusion in the removal molten steel as much as possible is a main purpose of steelmaking process.Therefore, in order to promote inclusion floating and the removal in the molten steel, make the temperature and the molten steel component homogenizing of molten steel, improve the quality of steel, basically all to adopt in the present smelting process at ladle bottom the smelting technology that gas permeable brick carries out the gas winding-up is installed, this implementation of processes is simple, and effect is remarkable, thereby has obtained large-scale use in whole steelmaking system.
Steel ladle bottom argon blowing is as follows to the removal principle of inclusion in the molten steel: the molten steel that (1) inclusion forms by air blowing shape circulates and is transported to the slag that is covered by the molten steel upper strata behind slag-steel near interface and catches the back and remove; (2) caught the back by slag behind the slag blanket and remove by behind the dross inclusion adsorption of bubble own inclusion being carried into.When air-blowing quantity hour, the turbulent flow of molten steel ladle can be less, Molten Steel Flow is slow, to the ability of slag-steel near interface transportation clip foreign material a little less than, be unfavorable for that the collision of inclusion is grown up; When air-blowing quantity was big, the molten steel in the ladle seethed severity, and volume slag phenomenon is serious, also was unfavorable for that floating foreign removes this moment, and therefore removing the steel ladle bottom argon blowing tolerance that is mingled with should be of moderate size.In addition, what of the diameter of bubble and number of bubbles also directly influence the effect of Argon, and the diameter of bubble is big more, and bubble floating speed is just fast more, and the run duration in molten steel is short more, therefore go to be mingled with ability a little less than.Otherwise bubble is more little, and the time of moving in molten steel is also long more, and therefore easy more adhesion inclusion has and better go to be mingled with ability.Moreover number of bubbles is many more in the molten steel, and the cell cube that absorption is mingled with is many more, and it is also just strong more therefore to remove the ability that is mingled with.To sum up analyze, in the BOTTOM ARGON BLOWING process, number of bubbles is many more, bubble diameter is more little, and the time that bubble moves in molten steel is long more, the inclusion in the easy more removal steel.
The quality of steel ladle bottom argon blowing effect except catch up with the factor of stating relevant, also in close relations with the ventilative type of gas permeable brick, the big or small width in the ventilative slit of gas permeable brick etc.Through years of development, the present main type of gas permeable brick has slit-type, diffuse type, circumferential weld type, straight-through pass, labyrinth type and ceramic rod slit compound etc., in these gas permeable brick types, owing to such as reasons such as production process are too complicated, work-ing life is lower, the air blowing effect is relatively poor, making that the scene is the most widely used at present is the slit-type gas permeable brick, is diffuse type gas permeable brick, circumferential weld type gas permeable brick etc. secondly.
The diffuse type gas permeable brick is because even air hole distribution, the aperture is tiny, the bubble that winding-up is come out has the advantage that diameter is little, quantity is many, all have good going and are mingled with effect, especially under now to the more and more lower situation of steel inclusion quantitative requirement, the going of diffuse type gas permeable brick is mingled with effect and has incomparable advantage especially.But the diffuse type gas permeable brick mainly adopts mechanical pressing, and gas permeable brick is abnormity to a certain degree, so the volume of diffuse type gas permeable brick is generally less, large-scale brick body will be difficult to moulding, and it is excessive as fruit volume, the ventilation property of diffuse type gas permeable brick can be worse and worse, so along with the expansion gradually of ladle tonnage, the diffuse type gas permeable brick can not satisfy the use needs of on-the-spot big ladle.The slit-type gas permeable brick of main flow has the advantage that moulding process is simple, Air permenbility is big, through-blowing rate is high on the market now, but because its slit width and thickness with respect to the pore of diffuse type gas permeable brick much bigger times, so the number of bubbles that the slit-type gas permeable brick jets out is less, and bubble diameter is bigger, therefore the slit-type gas permeable brick will obviously be worse than the diffuse type gas permeable brick going to be mingled with on the effect, particularly in the higher special steel smelting process of ask for something, the going of slit-type gas permeable brick is mingled with effect and needs optimization especially badly.
Summary of the invention
In order to overcome the different shortcomings that above-mentioned gas permeable brick has, the present invention aims to provide and a kind ofly brings into play various gas permeable brick advantages, be easy to moulding, go the ability that is mingled with strong, be suitable for the compound bottom-blown air brick that the high quality variety steel is smelted.
The technical measures that the utility model is taked are: the compound bottom-blown air brick that the utility model relates to is made of two portions, and top is the less diffuse type gas permeable brick in even air hole distribution, aperture; The bottom is slit-type, the non-diffuse type gas permeable bricks such as straight-through pass, labyrinth type or circumferential weld type that Air permenbility is big, be easy to moulding.
Top diffuse type gas permeable brick adopts mechanical pressing, and volume accounts for the part of whole gas permeable brick.
The bottom gas permeable brick is generally the non-diffuse type gas permeable brick by casting.
There is an air chamber in the middle of the non-diffuse type gas permeable brick in top diffuse type gas permeable brick and bottom.
The non-diffuse type type of top diffuse type gas permeable brick and bottom gas permeable brick is fixed by double buckle, and to connect effect better if smear a small amount of chamotte in the double buckle junction.
Two gas permeable bricks are undertaken finally fixing by the steel bushing of gas permeable brick outside up and down.
The utility model is compared with existing gas permeable brick technology has following excellent results: the diffuse type gas permeable brick only accounts for the part of whole gas permeable brick, so volume is little, has overcome large-scale diffuse type gas permeable brick not easy-formation and the relatively poor problem of ventilation property.The final ejection passage of argon gas is the less little pore of diffuse type in even air hole distribution, aperture, so the bubble diameter of winding-up is less, quantity is more, has the ability of good absorption and removal inclusion, is particularly suitable for the smelting of high quality variety steel.
Description of drawings
Fig. 1 is the diagrammatic cross-section of at present general slit-type gas permeable brick.
Fig. 2 is the diagrammatic cross-section of common diffuse type gas permeable brick.
Fig. 3 is a diagrammatic cross-section of the present utility model.
Fig. 4 is top of the present utility model gas permeable brick and bottom gas permeable brick junction upward view.
Among the figure: 1-slit-type gas permeable brick, 2-gas permeable brick brick cup, 3-diffuse type gas permeable brick, 4-top diffuse type gas permeable brick, the 5-air chamber, the non-diffuse type gas permeable brick in 6-bottom, the 7-steel bushing, 8-is gas permeable brick connection place chamotte up and down, and 9-gas permeable brick up and down connects double buckle.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing and embodiment.
Referring to Fig. 1, Fig. 2, common integral air brick generally is made of two portions, and inside is generally slit-type gas permeable brick 1 or diffuse type gas permeable brick 3, outer wrap be gas permeable brick brick cup 2.
Referring to Fig. 1, common slit-type gas permeable brick in use gas sprays from slit, and bubble is bigger, direction of motion vertically upward, absorption and to remove the inclusion ability lower, effect is relatively poor when refining high quality variety steel.
Referring to Fig. 2, common diffuse type gas permeable brick air blowing effect is better, but because the control of molding mode makes that diffuse type gas permeable brick volume is difficult to maximize, and large-scale diffuse type gas permeable brick air permeable effect is relatively poor, has therefore limited the use of diffuse type gas permeable brick on existing big ladle.
Referring to Fig. 3, gas permeable brick of the present utility model top is diffuse type gas permeable brick 4, and in use bubble sprays from even, tiny pore, forms a large amount of, the less bubble population of diameter, has played the effect of good absorption and removal steel inclusion; The source of diffuse type gas permeable brick gas is for being present in gas permeable brick intermediary air chamber 5 up and down, and air chamber links to each other with bottom non-diffuse type type gas permeable brick 6.
Referring to Fig. 3, Fig. 4, the non-diffuse type gas permeable brick in top diffuse type gas permeable brick 4 and bottom is by forming double buckle 9 connections on the gas permeable brick up and down, adopt the effect meeting of smearing a small amount of chamotte 8 better on the double buckle contact surface, the outside method of parcel steel bushing 7 that adopts was carried out further fixing and sealing after gas permeable brick connected up and down, got final product behind the outside cast brick cup 2.
Referring to Fig. 4, the double buckle 9 of gas permeable brick formation forms by the change of mould up and down, and the quantity of double buckle what be reference standard with gas permeable brick about fixing, and quantity is not done qualification.
For a person skilled in the art, the non-diffuse type gas permeable brick 6 in bottom of the present utility model can be circumferential weld type, straight-through pass or labyrinth type gas permeable brick, and not only is confined to the slit-type gas permeable brick; The connection of gas permeable brick can be used double buckle up and down, but also can form with the identical modes such as annular recesses of principle.
Above-mentioned example of the present utility model only is a case of operating for clearer explanation the utility model; and be not to be qualification to the utility model embodiment; for a person skilled in the art; can also on this example basis, make other multi-form change or improvement, and the change that those and the utility model are close or improve belongs to still within the protection domain of the present utility model.
Claims (3)
1. a composite air bricks is characterized in that this gas permeable brick adopts two gas permeable bricks formations up and down, and the top gas permeable brick is the diffuse type gas permeable brick, and the bottom is non-diffuse type gas permeable brick, has an air chamber between two gas permeable bricks up and down.
2. a kind of composite air bricks according to claim 1 is characterized in that top gas permeable brick and bottom gas permeable brick connect by double buckle, passes through the further sealing and fixing of chamotte on the double buckle contact surface.
3. a kind of composite air bricks according to claim 1 is characterized in that up and down the outside finally method by the parcel steel bushing of two gas permeable bricks connects and fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920249894 CN201620177U (en) | 2009-10-16 | 2009-10-16 | Composite porous brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920249894 CN201620177U (en) | 2009-10-16 | 2009-10-16 | Composite porous brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201620177U true CN201620177U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920249894 Expired - Fee Related CN201620177U (en) | 2009-10-16 | 2009-10-16 | Composite porous brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201620177U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028740A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block |
| CN106392047A (en) * | 2016-08-31 | 2017-02-15 | 长兴科特碳化硅有限公司 | Composite slit type permeable brick and preparation method thereof |
| CN106424691A (en) * | 2016-08-31 | 2017-02-22 | 长兴科特碳化硅有限公司 | Compound type dispersion air brick |
-
2009
- 2009-10-16 CN CN 200920249894 patent/CN201620177U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028740A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block |
| CN104028740B (en) * | 2014-06-18 | 2017-01-18 | 莱芜钢铁集团有限公司 | Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block |
| CN106392047A (en) * | 2016-08-31 | 2017-02-15 | 长兴科特碳化硅有限公司 | Composite slit type permeable brick and preparation method thereof |
| CN106424691A (en) * | 2016-08-31 | 2017-02-22 | 长兴科特碳化硅有限公司 | Compound type dispersion air brick |
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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: 20101103 Termination date: 20141016 |
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| EXPY | Termination of patent right or utility model |