CN105397079A - Pouring stream protecting device for pouring molten steel through large ladle in continuous casting - Google Patents
Pouring stream protecting device for pouring molten steel through large ladle in continuous casting Download PDFInfo
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- CN105397079A CN105397079A CN201510681200.2A CN201510681200A CN105397079A CN 105397079 A CN105397079 A CN 105397079A CN 201510681200 A CN201510681200 A CN 201510681200A CN 105397079 A CN105397079 A CN 105397079A
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- vertical tube
- tube part
- continuous casting
- large bag
- protective device
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Abstract
The invention provides a pouring stream protecting device for pouring molten steel through a large ladle in continuous casting. The pouring stream protecting device comprises a shell and a channel, wherein the channel is located in the shell and penetrates through the shell, and ladle filler sand and the molten steel can pass through the channel. The channel comprises a connector part, a narrow straight barrel part and a wide straight barrel part, wherein the connector part is used for being matched with an upper nozzle of the large ladle for sealing, and the upper nozzle of the large ladle is sleeved with the connector part; one end of the narrow straight barrel part is communicated with the connector part, and the inner diameter of the narrow straight barrel part is smaller than that of the connector part; the wide straight barrel part is communicated with the other end of the narrow straight barrel part, and the inner diameter of the wide straight barrel part is larger than that of the narrow straight barrel part. Through the pouring stream protecting device, the nature of large-ladle pouring protection can be improved, and the large-ladle pouring protection effect is prominent; besides, the pouring stream protecting device is easy to mount, convenient to use and high in operability.
Description
Technical field
The present invention relates to metallurgical continuous casting equipment technical field, particularly a kind of beam protective device for the large bag pour steel of continuous casting.
Background technology
At present, continuous casting generally takes full guard pouring technology, mainly comprises four aspects: the beam protection of large bag-tundish, the protection of pouring basket liquid level, the beam protection of tundish-crystallizer, the protection of mold liquid level.
Wherein, the steel stream protection of large bag-tundish adopts large bag long nozzle; Main Function prevents steel stream from contacting with air; reduce the secondary oxidation of molten steel; also contribute to the stream flowing of stable large Baogang, reduce tundish surface fluctuation, improve pouring basket liquid level slag; reduce foreign substance in molten steel content, improve steel quality.
In the large bag steel pouring process of continuous casting, first open large water-coating port stuffing sand is released, the mouth of a river is closed in 5 ~ 10 seconds after seeing steel stream, hang large water-coating port upper end and wrap greatly the mouth of a river and be connected, Metal in Tundish liquid level is inserted in lower end, thus large Baogang stream is come with air exclusion, play the effect of protection steel stream, subject matter unwraps greatly to water rear steel stream and must open wide cast 5 ~ 10 seconds, cause the serious secondary oxidation of this part molten steel, if the unlimited duration of pouring is too short, wrap greatly mouth of a river temperature low, easily cause molten steel solidification to block and wrap the mouth of a river greatly, cause large bag to burn oxygen; If it is long to open wide cast, by the secondary oxidation of aggravation molten steel, worsen steel quality.
Unwrap greatly and water the main cause that rear steel stream must open wide cast and be: when assuring greatly standby, need to fill stuffing sand in steel base brick and filling pipe end, prevent molten steel inject large bag laggard enter brick cup and filling pipe end solidify, released again when large bag cast, played drainage.Stuffing sand density about 2.0 × 103 kilograms per cubic meter, moisture is within 0.5%.Hanging large bag long nozzle opens when watering, due to stuffing sand, comparatively Tundish Slag, molten steel density are low, stuffing sand will be blocked in the large bag long nozzle straight tube of more than pouring basket liquid level, add that stuffing sand contains moisture, gasify after being subject to molten steel high-temperature baking, expand, large bag long nozzle chamber pressure is high, and large water-coating port is opened when watering and caused molten steel to overflow from the rim of a bowl, easily causes the sticky parts production accident of large bag.
Summary of the invention
The object of the present invention is to provide a kind of beam protective device for the large bag pour steel of continuous casting, to solve problems such as unwrapping greatly cast protected effect difference.
In order to solve the problem, the invention provides following technical scheme:
For a beam protective device for the large bag pour steel of continuous casting, it comprises housing and is positioned at described enclosure interior and runs through described housing and for the passage by stuffing sand and molten steel; Described passage comprises: interface portion, for wrap greatly mouth of a river fitted seal, be set in and wrap greatly on the mouth of a river; Narrow vertical tube part, one end and described interface portion through, internal diameter is less than the internal diameter of described interface portion; Wide vertical tube part, through with the described narrow vertical tube part other end, internal diameter is greater than the internal diameter of described narrow vertical tube part.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, also comprise: tapered portion, between described narrow vertical tube part and wide vertical tube part, inside described narrow vertical tube part to described wide vertical tube part increases gradually without leave, seamlessly transits to be formed.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, the angle of taper that described tapered portion is formed is 50-70 °.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, also comprise neck, between described interface portion and narrow vertical tube part, inside described interface portion to described narrow vertical tube part reduces gradually without leave, seamlessly transits to be formed.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, the angle of taper of described neck formation is 60-80 °.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, the length of described wide vertical tube part is at least 300mm.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, the degree of depth that described wide vertical tube part inserts pouring basket liquid level is 100 ~ 200mm.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, described housing is shaping by quartz sand refractory material casting.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, described housing by corundum or graphitic carbon refractory material compressing.
In the beam protective device for the large bag pour steel of continuous casting as above, preferably, described housing entirety is in tubular.
Analyze known, in the present invention, the beam passage of large bag long nozzle comprises the syllogic design of interface portion, narrow vertical tube part, wide vertical tube part.Solve large bag long nozzle to insert below Metal in Tundish liquid level and open to water and turn over this difficult problem of steel.Compare existing large bag cast resist technology, the essence that the present invention can realize large bag cast protection is improved, and large bag cast protected effect is given prominence to, and installs simple, use, workable.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention and application structure schematic diagram thereof;
Fig. 2 is the tapered portion of the embodiment of the present invention and the cone angle schematic diagram of neck.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
In order to structure and the application thereof of clearer description the present embodiment, Fig. 1 and Fig. 2 show the present embodiment and and wrap greatly 3, annexation, position relationship between tundish 2.In large bag 3 bottoms, be provided with and wrap greatly the mouth of a river 4.
As depicted in figs. 1 and 2, the present embodiment comprises housing 101 and is positioned at housing 101 inner and on housing 101 axis direction, run through housing 101 and for the path 10 2 by stuffing sand and molten steel.Preferably, housing 101 entirety is in tubular, and substantially wait wall thickness, outer appearnce is similar to tubaeform.Path 10 2 in housing 101 comprises: interface portion 11, neck 12, narrow vertical tube part 13, tapered portion 14, wide vertical tube part 15.Wherein, interface portion 11 and wrap greatly the mouth of a river 4 fitted seal, is set in and wraps greatly on the mouth of a river 4.Interface portion 11 is provided with the bowl-shape of opening in bottom.The active force upwards that the bottom that can put on interface portion by large bag holder in reality produces realizes fitted seal.Narrow vertical tube part 13 one end and interface portion 11 through, internal diameter is less than the internal diameter of interface portion 11.Wide vertical tube part 15 is through with narrow vertical tube part 13 other end, and internal diameter is greater than the internal diameter of narrow vertical tube part 13.During application, unwrap greatly after watering, stuffing sand is dirty, because stuffing sand density is obviously on the low side compared with molten steel, so stuffing sand rests in large water-coating port, more than molten steel; Stuffing sand contains moisture, opens when watering and has portion gas to discharge; Internal diameter due to wide vertical tube part 15 is greater than the internal diameter of narrow vertical tube part 13, therefore can improve memory space to hold the gas of stuffing sand and discharge thereof.
Neck 12,14, tapered portion are the transition portion of the inconsistent adjacent segment of internal diameter, such as, neck 12 is between interface portion 11 and narrow vertical tube part 13, in it, interface portion 11 reduces gradually to narrow vertical tube part 13 without leave, formation seamlessly transits, the angle of the cone angle of neck formation is 55 ~ 85 °, preferred 60-80 °, such as: 60 °, 65 °, 70 °, 75 °, 80 °.Tapered portion 14 is between narrow vertical tube part 13 and wide vertical tube part 15, in it, narrow vertical tube part 13 increases gradually to wide vertical tube part 15 without leave, and formation seamlessly transits, and the angle of the cone angle beta that tapered portion is formed is 45 ~ 75 °, preferred 50-70 °, such as: 50 °, 55 °, 60 °, 65 °, 70 °.The height of neck can be 50 ~ 100mm, and the height in tapered portion can be 100 ~ 150mm.
The present embodiment can design shape, the size of each section according to different ladle shapes, beam size, insertion depth, but should ensure more than tundish 2 molten steel 21 liquid level, wide vertical tube part 15 length is not less than 200mm, thus memory space can be provided for stuffing sand and Exhaust Gas thereof, avoid the phenomenon emitting steel from large water-coating port interface portion because insufficient space occurs.If because large water-coating port inserted shallow, then large bag beam turns over the fluctuation of rear pouring basket liquid level greatly, easy slag; If inserted dark, in the middle of large bag beam impacts at the bottom of handbag, the resistance to material in bottom is easily caused to wash away seriously, increase tundish and wear bag risk, the length of the wide vertical tube part 15 therefore below molten steel 21 liquid level is between 90 ~ 220mm, preferably between 100 ~ 200mm therefore, the length of wide vertical tube part 15 is at least 300mm, is preferably 400 ~ 500mm.
Manufacture the present embodiment time, housing 101 material should be refractory material, structure should be one-body molded, and such as, housing 101 is shaping by quartz sand refractory material casting, or, housing 101 by corundum or graphitic carbon refractory material compressing.
During application the present embodiment; after large bag 3 is opened and is watered; wide straight tube 15 plays and stores stuffing sand, pressure release effect; prevent molten steel from overflowing from interface portion 11, realize large bag and hang the mouth of a river and insert below pouring basket liquid level and open and water, open and slowly open large bag beam when watering (such as first time unwraps greatly when opening is not whole unlatching; but open with the open degree of 1/2 ~ 2/3); prevent from opening and water steel and flow through and turn over steel greatly, stop to unwrap greatly and water that molten steel is naked waters secondary oxidation, improve large bag molding casting effect.
To sum up, the present invention is by arranging horn mouth in large bag long nozzle bottom, open below realization large bag extension long nozzle insertion Metal in Tundish liquid level and water, can avoid unwrapping greatly molten steel when watering directly to contact with air in casting process, reduce the gas content of molten steel oxygen, nitrogen, improve the degree of purity of molten steel, promote slab quality, improve stocking end properties.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.
Claims (10)
1. for a beam protective device for the large bag pour steel of continuous casting, it is characterized in that, comprise housing and be positioned at described enclosure interior and run through described housing and for the passage by stuffing sand and molten steel;
Described passage comprises:
Interface portion, for wrap greatly mouth of a river fitted seal, be set in and wrap greatly on the mouth of a river;
Narrow vertical tube part, one end and described interface portion through, internal diameter is less than the internal diameter of described interface portion;
Wide vertical tube part, through with the described narrow vertical tube part other end, internal diameter is greater than the internal diameter of described narrow vertical tube part.
2. the beam protective device for the large bag pour steel of continuous casting according to claim 1, is characterized in that, also comprise:
Tapered portion, between described narrow vertical tube part and wide vertical tube part, inside described narrow vertical tube part to described wide vertical tube part increases gradually without leave, seamlessly transits to be formed.
3. the beam protective device for the large bag pour steel of continuous casting according to claim 2, is characterized in that, the angle of taper that described tapered portion is formed is 50-70 °.
4. the beam protective device for the large bag pour steel of continuous casting according to claim 2, is characterized in that, also comprise:
Neck, between described interface portion and narrow vertical tube part, inside described interface portion to described narrow vertical tube part reduces gradually without leave, seamlessly transits to be formed.
5. the beam protective device for the large bag pour steel of continuous casting according to claim 4, is characterized in that, the angle of taper of described neck formation is 60-80 °.
6. the beam protective device for the large bag pour steel of continuous casting according to claim 1, is characterized in that, the length of described wide vertical tube part is at least 300mm.
7. the beam protective device for the large bag pour steel of continuous casting according to claim 1, is characterized in that, the degree of depth that described wide vertical tube part inserts pouring basket liquid level is 100 ~ 200mm.
8. the beam protective device for the large bag pour steel of continuous casting according to claim 1, it is characterized in that, described housing is shaping by quartz sand refractory material casting.
9. the beam protective device for the large bag pour steel of continuous casting according to claim 1, is characterized in that, described housing by corundum or graphitic carbon refractory material compressing.
10. according to the arbitrary described beam protective device for the large bag pour steel of continuous casting of claim 1-9, it is characterized in that, described housing entirety is in tubular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681200.2A CN105397079A (en) | 2015-10-19 | 2015-10-19 | Pouring stream protecting device for pouring molten steel through large ladle in continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681200.2A CN105397079A (en) | 2015-10-19 | 2015-10-19 | Pouring stream protecting device for pouring molten steel through large ladle in continuous casting |
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| CN105397079A true CN105397079A (en) | 2016-03-16 |
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| CN201510681200.2A Pending CN105397079A (en) | 2015-10-19 | 2015-10-19 | Pouring stream protecting device for pouring molten steel through large ladle in continuous casting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944609A (en) * | 2017-03-17 | 2017-07-14 | 华北理工大学 | A kind of outstanding flowing water mouthful and reduction molten steel are with being mingled with the method for corroding resistance to material |
| CN109562447A (en) * | 2016-08-09 | 2019-04-02 | Ak钢铁产权公司 | Feed slot funnel |
| CN111136256A (en) * | 2020-02-17 | 2020-05-12 | 本钢板材股份有限公司 | Molten steel continuous casting equipment and continuous casting method |
| CN112170797A (en) * | 2020-09-28 | 2021-01-05 | 本溪市宏业实业有限责任公司 | Method for separating drainage sand and molten steel during ladle casting |
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| JPH1110292A (en) * | 1997-06-25 | 1999-01-19 | Nkk Corp | Long nozzle for continuous casting |
| CN2853235Y (en) * | 2005-09-07 | 2007-01-03 | 唐山钢铁股份有限公司 | Bell long water gap for continuous casting |
| CN2917879Y (en) * | 2006-04-07 | 2007-07-04 | 唐山钢铁股份有限公司 | Argon-sealing long water gap |
| CN201960102U (en) * | 2011-03-03 | 2011-09-07 | 莱芜钢铁股份有限公司 | Long nozzle for continuously casting pouring tundish |
| CN202316999U (en) * | 2011-09-15 | 2012-07-11 | 华耐国际（宜兴）高级陶瓷有限公司 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
| CN202591602U (en) * | 2012-03-23 | 2012-12-12 | 宝山钢铁股份有限公司 | Reverse-spray resistant ladle nozzle device |
| CN204294913U (en) * | 2014-11-27 | 2015-04-29 | 武汉钢铁(集团)公司 | A kind of protection tube |
| CN205057036U (en) * | 2015-10-19 | 2016-03-02 | 山东钢铁股份有限公司 | A beam protection device that is used for big packet of pour steel of continuous casting |
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2015
- 2015-10-19 CN CN201510681200.2A patent/CN105397079A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1110292A (en) * | 1997-06-25 | 1999-01-19 | Nkk Corp | Long nozzle for continuous casting |
| CN2853235Y (en) * | 2005-09-07 | 2007-01-03 | 唐山钢铁股份有限公司 | Bell long water gap for continuous casting |
| CN2917879Y (en) * | 2006-04-07 | 2007-07-04 | 唐山钢铁股份有限公司 | Argon-sealing long water gap |
| CN201960102U (en) * | 2011-03-03 | 2011-09-07 | 莱芜钢铁股份有限公司 | Long nozzle for continuously casting pouring tundish |
| CN202316999U (en) * | 2011-09-15 | 2012-07-11 | 华耐国际（宜兴）高级陶瓷有限公司 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
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| CN204294913U (en) * | 2014-11-27 | 2015-04-29 | 武汉钢铁(集团)公司 | A kind of protection tube |
| CN205057036U (en) * | 2015-10-19 | 2016-03-02 | 山东钢铁股份有限公司 | A beam protection device that is used for big packet of pour steel of continuous casting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109562447A (en) * | 2016-08-09 | 2019-04-02 | Ak钢铁产权公司 | Feed slot funnel |
| CN106944609A (en) * | 2017-03-17 | 2017-07-14 | 华北理工大学 | A kind of outstanding flowing water mouthful and reduction molten steel are with being mingled with the method for corroding resistance to material |
| CN111136256A (en) * | 2020-02-17 | 2020-05-12 | 本钢板材股份有限公司 | Molten steel continuous casting equipment and continuous casting method |
| CN112170797A (en) * | 2020-09-28 | 2021-01-05 | 本溪市宏业实业有限责任公司 | Method for separating drainage sand and molten steel during ladle casting |
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Application publication date: 20160316 |