CN102398004A - Sliding waterslot device capable of preventing vortex - Google Patents
Sliding waterslot device capable of preventing vortex Download PDFInfo
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- CN102398004A CN102398004A CN2011103870205A CN201110387020A CN102398004A CN 102398004 A CN102398004 A CN 102398004A CN 2011103870205 A CN2011103870205 A CN 2011103870205A CN 201110387020 A CN201110387020 A CN 201110387020A CN 102398004 A CN102398004 A CN 102398004A
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- pipe end
- sliding plate
- molten steel
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Abstract
The invention relates to a sliding waterslot device for preventing vortex. An upper sliding plate and a lower sliding plate are fixed relatively and cannot move; a middle sliding plate is arranged between the upper sliding plate and the lower sliding plate and can move reciprocally along a horizontal direction between the upper sliding plate and the lower sliding plate; bypass side holes which are communicated with the inside of an upper waterslot are formed at symmetric positions on the two sides on the top of the upper waterslot; and the middle of the inside of the upper waterslot is hollow and is communicated with a lower waterslot through molten steel flowing channels on the upper sliding plate, the meddle sliding plate and the lower sliding plate. When the technical scheme of the invention is adopted, the vertical flowing of molten steel is prevented, the molten steel enters the upper waterslot from a side hole, confluence vortex can be inhibited effectively, the slag covering liquid surface and air are prevented from being carried in, the quality of casting blanks can be improved effectively, the amount of residual steel in a casting container can be reduced, and the metal yield can be increased; and the structure of the device is simple, the manufacturing of the device is convenient, confluence vortex can be inhibited effectively without requiring other devices, the consumption of refractory matters can be reduced, and production cost can be reduced.
Description
Technical field
The invention belongs to the continuous casting technical field of steel, particularly relate to the sliding nozzle device of on the continuous casting tundish, using that vortex produces that prevents.
Background technology
When carrying out the continuous pouring of molten steel; At first be will refining is good molten steel be transported to the cast zone of bale panoramic tables with ladle; Through big bag long nozzle the molten steel in the ladle is injected in the continuous casting tundish again; Make the mouth of a river of molten steel through the bottom in the tundish be dispensed to constantly that continuously cooling and freezing becomes to have certain thickness liquid core base shell in the corresponding crystallizer then, and in follow-up secondary cooling zone territory, be cooled to all solid state steel billet gradually; In this process, ladle and tundish all are molten steel to be delivered in the metallurgical reaction in downstream through the vertically arranged mouth of a river that makes with refractory material, and the suitable for reading and ladle at the mouth of a river or tundish bottom link to each other, and form through-type molten steel channel; Therefore,,, can produce a kind of important flow phenomenon, the vortex that confluxes that place, Here it is mouth of a river molten steel produces when flowing out along with the reduction of molten steel face in the cast latter stage of ladle and tundish.Can know that by experience when liquid is flowed downward by vertical outlet, when liquid level is lower than a certain critical altitude, above outlet, can form the vortex funnel, vortex promptly confluxes.The vortex that confluxes that molten steel outflow process forms can be involved in molten steel inside to the covering slag of liquid level and steel inclusion, even be involved in air, increases secondary oxidation, the quality of severe exacerbation steel billet.In continuous pouring and when changing ladle, before and after often taking place in the steel billet of ladle bonding pad the field trash index rise, this has substantial connection with conflux vortex volume slag and secondary oxidation.In basket pouring at the end, also can produce the vortex that confluxes, and the phenomenon that slag mixes volume occur, cause the tail base of cast seriously to demote or declare uselessly, reduce recovery rate of iron.
Up to now, existing many research confluxing the vortex phenomenon and launch in the metallurgical tank, research shows, the conflux factor of vortex of influence has following several respects: 1) time of repose; The liquid that injects the molten bath vortex time retardation, critical altitude decline occur after leaving standstill after a while.2) inject flow path direction; Time of repose more in short-term, to form the critical altitude of vortex lower for fluid when axially injecting, it is big that critical altitude is injected in the tangential, when time of repose was longer, the two difference was little.3) go out the head piece degree of eccentricity; The center is flowed out and is generated vortex early, the difficult vortex that forms of eccentric outflow.4) outlet diameter; Outlet diameter increases can significantly increase the trend that vortex occurs.5) rising of liquid level or decline; Vortex appears in liquid level more easily when rising; 6) shape of stopper; Smaller with the stopper cast vortex critical altitude when pour into a mould with slide gate nozzle, this is because stopper increases the resistance that is flowed in the tangential, but acts on limitedly, and vortex will be along generation around the stopper.7) blow in the mouth of a river; Introduce gas jet, the generation of deferrable vortex around at the mouth of a river vertically.8) level is effluented; Since the effect of viscous force, level only effluent center line of discharge place horizontal plane and on lower wall surface big velocity gradient is arranged, the vertical speed gradient is little, so can not produce vortex.There was the vortex phenomenon outlet top when level of in fact also never observing was effluented.
Under the prior art condition, big bag is to control the molten steel flow and stop bale slag-blanking through the slide gate nozzle that slide plate is installed on the mouth of a river when pouring into a mould.Both can adopt stopper to control flow during basket pouring, and also can adopt slide gate nozzle to control flow, two kinds of situation all have extensive application at the scene, still, more are easy to generate vortex in the tundish when using slide plate.Control the big bag and the tundish of stream to adopting sliding nozzle device; Be difficult to accurately judge that the critical liquid level of vortex volume slag appears in the mouth of a river; In order to prevent down slag, often take the passive measure of excessive surplus steel in the production scene, just close the mouth of a river during critical liquid level that the molten steel face is higher than that vortex produces in container; Can be left a large amount of remaining molten steel like this, reduce recovery rate of iron.The means of slag detection down that adopt are also arranged, and to be checked measuring when vortex is rolled up slag closed the mouth of a river again, but this measure still can stay many residual steel, and recovery rate of iron is not high.Ideal method is that employing vortex control device fundamentally reduces the critical altitude that the vortex that confluxes produces at present; Postpone the appearance of vortex or suppress the formation of through funnel-form vortex, wherein, comparatively common a kind of way valve method of swimming exactly; Promptly above sprue gate, put the valve that swims; Valve body density is between molten steel and slag, and valve body constantly reduces with liquid level, can suppress the formation of vortex and stop being involved in of bits; Certainly, also can above the mouth of a river, add the formation that fixture suppresses vortex, be that a kind of structure of tundish generation eddy flow, the disclosed a kind of ladle and middle pot drainage opening of preventing of patent of invention that publication number is CN1067597A of preventing of the disclosure of the Invention of CN 101844223A rolled up the device of slag and the device of two disclosed elimination vortexs of utility model that publication number is CN201140272 and CN201735774U in effluenting like publication number; Its basic principle be all above the mouth of a river or oblique upper retention device is set; Suppress the to conflux formation of vortex reduces the suction of bits and air, still; Comprise the valve method of swimming in these interior inhibition methods; All can not stop the vertical inflow of molten steel directly over the mouth of a river fully, the effect of the vortex that therefore suppresses to conflux not is very good, and; These methods all need be added extra device in molten steel; Will inevitably increase refractory material purchase cost and manufacturing cost, simultaneously, the device that these refractory materials are made in molten steel through constantly washing away; Also can increase the inclusion content in the steel, the quality of strand is produced in influence.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of sliding nozzle device that prevents that vortex from producing, through the present technique scheme; To descending continuous casting in the prior art with the existing above-mentioned deficiency of sliding nozzle device; Can obviously eliminate the vortex that confluxes of ladle and tundish outlet, reduce the mixed volume of slag and the suction of air, promote the come-up of steel inclusion; Improve the slab quality of cast, increase recovery rate of iron.
For solving the problems of the technologies described above, the present invention adopts following technical solution: a kind of sliding nozzle device that prevents that vortex from producing mainly is made up of filling pipe end, upper slide, middle slide plate, lower skateboard and the following mouth of a river; Said filling pipe end is connected with the brick cup of tundish or big bag bottom and is fixed together; Its lower end closely links to each other with upper slide, and the upper slide below is middle slide plate, and middle slide plate below is a lower skateboard; Said upper slide and lower skateboard relative fixed are motionless; Said in the middle of slide plate be arranged between upper slide and the lower skateboard, but and along continuous straight runs between upper slide and lower skateboard, move back and forth, said upper slide, middle slide plate and lower skateboard are provided with the Molten Steel Flow passage of vertical direction; The bottom of said tundish or big bag is provided with slide mechanism; Slide plate is connected with slide mechanism in the middle of said, and said filling pipe end end face is a closed, bilateral symmetry position, the top of filling pipe end offer with filling pipe end in the bypass side opening that is connected; In the middle of in the said filling pipe end is hollow, is connected with the following mouth of a river through the Molten Steel Flow passage on upper slide, middle slide plate and the lower skateboard.
The bypass side opening that said filling pipe end both sides are provided with is square, circular or oval, and the both sides end face of said bypass side opening is provided with lead angle.
The upper edge of the bypass side opening two side ends face that said filling pipe end both sides are provided with and place, lower edge are provided with 45 ° of lead angles.
The inside top surface plane flush of said bypass side opening upper edge peak and filling pipe end sealing.
Said bypass side opening lower edge minimum point is higher than the last plane of brick cup.
The cross sectional shape that is arranged in the vacancy in the said filling pipe end is circle, flat or ellipse.
The Molten Steel Flow channel diameter that is provided with on said upper slide and the lower skateboard is than the big 5～20mm of diameter of Molten Steel Flow passage on the middle slide plate.
The present invention has following beneficial effect with respect to prior art:
1 sliding nozzle device end face sealing; Stop the vertical inflow of molten steel, force molten steel to get into filling pipe end, the vortex that confluxes of outlet top, the very effective inhibition mouth of a river from the side opening of horizontal direction; Can prevent being involved in of liquid level covering slag and air, effectively improve slab quality.
During this slide gate nozzle cast of 2 employings, when liquid level is low, still can not produce the vortex that confluxes, can reduce the interior residual steel amount of cast container, improve recovery rate of iron.
3 slide gate nozzles are simple and reliable for structure, easy to make, need can effectively not suppress the vortex that confluxes by other device, reduced refractory consumption rate, reduced production cost.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
Fig. 2 is the side sectional view of filling pipe end among the present invention.
Fig. 3 is that the A-A of Fig. 2 is to cutaway view.
Among the figure, slide plate, 4 lower skateboards, 5 times mouths of a river, 6 bypass side openings, 7 Molten Steel Flow passages, 8 brick cups, 9 tundish or big bags in the middle of 1 filling pipe end, 2 upper slides, 3.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Like Fig. 1-shown in Figure 3, what the present invention relates to prevents the sliding nozzle device that vortex produces, and mainly includes filling pipe end 1, upper slide 2, middle slide plate 3, lower skateboard 4 and the following mouth of a river 5; Said filling pipe end 1 and tundish or the brick cup 8 that wraps 9 bottoms greatly are connected and fixed; Its lower end closely links to each other with upper slide 2, and upper slide 2 belows are middle slide plate 3, and middle slide plate 3 belows are lower skateboard 4; Said upper slide 2 is motionless with lower skateboard 4 relative fixed; Slide plate 3 is arranged between upper slide 2 and the lower skateboard 4 in the middle of said, but its said in the middle of slide plate 3 along continuous straight runs between upper slide 2 and lower skateboard 4, move back and forth, said upper slide 2, middle slide plate 3 and lower skateboard 4 are provided with the Molten Steel Flow passage 7 of vertical direction; Said tundish or wrap 9 bottom greatly and be provided with slide mechanism; Slide plate 3 is connected with slide mechanism in the middle of said, and said filling pipe end 1 end face is a closed, bilateral symmetry position, the top of filling pipe end 1 offer with filling pipe end 1 in the bypass side opening 6 that is connected; In the middle of in the said filling pipe end 1 is hollow, is connected with the following mouth of a river 5 through the Molten Steel Flow passage 7 on upper slide 2, middle slide plate 3 and the lower skateboard 4.
The bypass side opening 6 that said filling pipe end 1 both sides are provided with is square, circular or oval, and the both sides end face of said bypass side opening 6 is provided with lead angle.
The upper edge of the bypass side opening 6 both sides end faces that said filling pipe end 1 both sides are provided with and place, lower edge are provided with 45 ° of lead angles.
The inside top surface plane flush of said bypass side opening 6 upper edge peaks and filling pipe end 1 sealing.
Said bypass side opening 6 lower edge minimum points are higher than the last plane of brick cup 8.
The cross sectional shape that is arranged in the vacancy in the said filling pipe end 1 is circle, flat or ellipse.
Molten Steel Flow passage 7 diameters that are provided with on said upper slide 2 and the lower skateboard 4 are than the big 5～20mm of diameter of Molten Steel Flow passage 7 on the middle slide plate 3.
In the embodiments of the invention, the junction of upper slide 2 and lower skateboard 4 is to adopt the inclined plane to mesh together; When pouring into a mould, can control the area of Molten Steel Flow passage 7 up and down through the middle slide plate 3 that level moves back and forth, and reach the purpose of damming with throttling; All be closely to link to each other between said filling pipe end 1, upper slide 2, middle slide plate 3, lower skateboard 4 and the following mouth of a river 5, do not allow the inflow of molten steel; Said filling pipe end 1, upper slide 2, middle slide plate 3, lower skateboard 4, the mouth of a river 5 and brick cup 8 all are to be shaped through static pressure by different refractory materials to process down; Said brick cup 8 place mats can place mat rectangularity or circular around below the bypass side opening 6 of filling pipe end 1; If any the slit, can use the refractory material padding and compacting between said filling pipe end 1 and the brick cup 8, prevent the infiltration of molten steel.
Slide mechanism among the present invention is prior art, is not giving unnecessary details at this.
The above is merely preferable possible embodiments of the present invention, is not in order to limit scope of the present invention.
Claims (7)
1. sliding nozzle device that prevents that vortex from producing; Mainly include filling pipe end, upper slide, middle slide plate, lower skateboard and the following mouth of a river and constitute, the brick cup of said filling pipe end and tundish or big bag bottom is connected and fixed, and its lower end closely links to each other with upper slide; The upper slide below is middle slide plate; Middle slide plate below is a lower skateboard, and said upper slide and lower skateboard relative fixed are motionless, and said middle slide plate is arranged between upper slide and the lower skateboard; But the slide plate along continuous straight runs moved back and forth between upper slide and lower skateboard in the middle of it was said; Said upper slide, middle slide plate and lower skateboard are provided with the Molten Steel Flow passage of vertical direction, and the bottom of said tundish or big bag is provided with slide mechanism, and said middle slide plate is connected with slide mechanism; It is characterized in that: said filling pipe end end face is a closed; Bilateral symmetry position, the top of filling pipe end offer with filling pipe end in the bypass side opening that is connected, is hollow in the middle of in the said filling pipe end, be connected with the following mouth of a river through the Molten Steel Flow passage on upper slide, middle slide plate and the lower skateboard.
2. the sliding nozzle device that prevents that vortex from producing according to claim 1 is characterized in that, the bypass side opening that said filling pipe end both sides are provided with is square, circular or oval, and the both sides end face of said bypass side opening is provided with lead angle.
3. the sliding nozzle device that prevents that vortex from producing according to claim 2 is characterized in that, the upper edge of the bypass side opening two side ends face that said filling pipe end both sides are provided with and place, lower edge are provided with 45 ° of lead angles.
4. the sliding nozzle device that prevents that vortex from producing according to claim 1 is characterized in that, the inside top surface plane flush of said bypass side opening upper edge peak and filling pipe end sealing.
5. the sliding nozzle device that prevents that vortex from producing according to claim 1 is characterized in that said bypass side opening lower edge minimum point is higher than the last plane of brick cup.
6. the sliding nozzle device that prevents that vortex from producing according to claim 1 is characterized in that, the cross sectional shape that is arranged in the vacancy in the said filling pipe end is circle, flat or ellipse.
7. the sliding nozzle device that prevents that vortex from producing according to claim 1 is characterized in that the Molten Steel Flow channel diameter that is provided with on said upper slide and the lower skateboard is than the big 5～20mm of diameter of Molten Steel Flow passage on the middle slide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103870205A CN102398004A (en) | 2011-11-29 | 2011-11-29 | Sliding waterslot device capable of preventing vortex |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103870205A CN102398004A (en) | 2011-11-29 | 2011-11-29 | Sliding waterslot device capable of preventing vortex |
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| CN102398004A true CN102398004A (en) | 2012-04-04 |
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| CN2011103870205A Pending CN102398004A (en) | 2011-11-29 | 2011-11-29 | Sliding waterslot device capable of preventing vortex |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554207A (en) * | 2012-01-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Sliding water gap device capable of preventing vortex |
| CN103111613A (en) * | 2013-03-11 | 2013-05-22 | 安徽工业大学 | Pouring gate flow control device for preventing rotational flow from generating in continuous casting tundish |
| CN104195287A (en) * | 2014-09-11 | 2014-12-10 | 中冶南方工程技术有限公司 | Converter tapping hole capable of preventing eddy slag entrapment |
| CN104195288A (en) * | 2014-09-11 | 2014-12-10 | 中冶南方工程技术有限公司 | Converter tapping hole capable of preventing eddy slag entrapment |
| CN107175326A (en) * | 2017-06-28 | 2017-09-19 | 秦皇岛首秦金属材料有限公司 | A kind of steel ladle slide board structure |
| CN108393479A (en) * | 2018-04-18 | 2018-08-14 | 宜兴市龙宸炉料有限公司 | Tundish nozzle pocket brick capable of prolonging service life of upper nozzle |
| CN111761047A (en) * | 2020-07-28 | 2020-10-13 | 万恩同 | Positive pressure nozzle for molten steel transfer |
| CN112108642A (en) * | 2020-09-29 | 2020-12-22 | 重庆大学 | Steel ladle and method for preventing slag entrapment of molten steel |
| CN114096361A (en) * | 2019-03-04 | 2022-02-25 | 庆北大学校产学协力团 | Device for preventing floating objects from mixing into free surface of steel ladle and tundish in continuous casting process |
| CN115351270A (en) * | 2022-06-28 | 2022-11-18 | 东北大学 | Fixing device of middle package bottom electromagnetism whirl water gap equipment |
| CN116586597A (en) * | 2023-07-17 | 2023-08-15 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
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- 2011-11-29 CN CN2011103870205A patent/CN102398004A/en active Pending
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| EP0401988A2 (en) * | 1989-06-08 | 1990-12-12 | Foseco International Limited | Retaining and/or pouring means for tanks for metal melting baths |
| CN2243947Y (en) * | 1995-11-06 | 1997-01-01 | 冶金部鞍山热能研究院节能设备厂 | Sliding valve for metal ladle |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554207A (en) * | 2012-01-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Sliding water gap device capable of preventing vortex |
| CN103111613A (en) * | 2013-03-11 | 2013-05-22 | 安徽工业大学 | Pouring gate flow control device for preventing rotational flow from generating in continuous casting tundish |
| CN103111613B (en) * | 2013-03-11 | 2015-05-13 | 安徽工业大学 | Pouring gate flow control device for preventing rotational flow from generating in continuous casting tundish |
| CN104195287A (en) * | 2014-09-11 | 2014-12-10 | 中冶南方工程技术有限公司 | Converter tapping hole capable of preventing eddy slag entrapment |
| CN104195288A (en) * | 2014-09-11 | 2014-12-10 | 中冶南方工程技术有限公司 | Converter tapping hole capable of preventing eddy slag entrapment |
| CN107175326A (en) * | 2017-06-28 | 2017-09-19 | 秦皇岛首秦金属材料有限公司 | A kind of steel ladle slide board structure |
| CN108393479A (en) * | 2018-04-18 | 2018-08-14 | 宜兴市龙宸炉料有限公司 | Tundish nozzle pocket brick capable of prolonging service life of upper nozzle |
| CN114096361A (en) * | 2019-03-04 | 2022-02-25 | 庆北大学校产学协力团 | Device for preventing floating objects from mixing into free surface of steel ladle and tundish in continuous casting process |
| CN111761047A (en) * | 2020-07-28 | 2020-10-13 | 万恩同 | Positive pressure nozzle for molten steel transfer |
| CN111761047B (en) * | 2020-07-28 | 2021-11-26 | 万恩同 | Positive pressure nozzle for molten steel transfer |
| CN112108642A (en) * | 2020-09-29 | 2020-12-22 | 重庆大学 | Steel ladle and method for preventing slag entrapment of molten steel |
| CN115351270A (en) * | 2022-06-28 | 2022-11-18 | 东北大学 | Fixing device of middle package bottom electromagnetism whirl water gap equipment |
| CN115351270B (en) * | 2022-06-28 | 2024-06-11 | 东北大学 | Fixing device of tundish bottom electromagnetic cyclone nozzle equipment |
| CN116586597A (en) * | 2023-07-17 | 2023-08-15 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
| CN116586597B (en) * | 2023-07-17 | 2023-10-17 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
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Application publication date: 20120404 |
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