CN103045807B - Vacuum circulation degassing insert tube - Google Patents
Vacuum circulation degassing insert tube Download PDFInfo
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- CN103045807B CN103045807B CN201110307538.3A CN201110307538A CN103045807B CN 103045807 B CN103045807 B CN 103045807B CN 201110307538 A CN201110307538 A CN 201110307538A CN 103045807 B CN103045807 B CN 103045807B
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- CN
- China
- Prior art keywords
- tubular stinger
- brick
- vacuum circulation
- circulation degassing
- annular recesses
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a vacuum circulation degassing insert tube used for external refining RH devices; an annular groove is disposed on the outer wall of the insert tube; Al2O3-C bricks (4) are disposed in the annular groove. With the characteristic that the Al2O3-C refractory material is not easy to be moisturized by slag, the erosion of the vacuum circulation degassing insert tube caused by slag is reduced, and the purpose of bonded slag reduction is realized; therefore, the service life of the vacuum circulation degassing insert tube is prolonged.
Description
Technical field
The present invention relates to a kind of vacuum circulation degassing tubular stinger, relate in particular a kind of vacuum circulation degassing tubular stinger for external refining RH device.
Background technology
Nitrogen in steel, protium have a negative impact to its performance, and nitrogen makes steel generation blue shortness and timeliness embrittlement, and hydrogen makes steel generation hydrogen embrittlement and corrosion.Therefore, in smelting process, must carry out degassed processing to molten steel.Existing vacuum processing method has: RH method, nineteen fifty-seven Thyssen Iron And Steel Company invention vacuum circulation degassing method; RH-OB method is that nippon increases the new technology that heating function obtains in 1978 on RH method basis; RH-KTB method, is also Kawasaki top blowing oxygen vacuum outgas method, by Kawasaki, Japan company, in 1988, is invented; RH-PB method, circulating degasification powder injection process.Along with the raising of RH apparatus function and the continuous expansion of refining steel grade scope, RH device has occupied dominant position in external refining.Facts have proved, RH SECONDARY REFINING IN A VACUUM CHAMBER is to improve the quality of products, reduce production costs, expand the important means of kind.Domestic and international most steel mill has all configured RH a refining unit, and still, RH a refining unit is in use very harsh to the working conditions of RH tubular stinger.In RH treating processes, structure reason due to tubular stinger, make easily glutinous slag of tubular stinger, while especially producing the ultra low-carbon steels such as IF, dry slag is more serious, the erosion of slag is easily damaged the refractory materials of RH tubular stinger, and work-ing life of RH tubular stinger is short causes the vacuum chamber maintenance of rolling off the production line in advance, therefore makes RH tubular stinger become the weak link of RH refining unit and has directly determined the production efficiency of RH refining unit the work-ing life of RH tubular stinger.
At present, the method that reduces dry slag mainly contains: coating is processed, and specifically adopts coating that slag is not directly contacted with mould material, to reach the object that reduces dry slag, but in treating processes, because slag has limited the ability of coating inhibition dry slag to the erosion of coating; Residue adjustment is processed, and is at RH, to process the later stage to carry out slag modification, reduces the viscosity of slag, thereby makes slag be difficult for sticking on tubular stinger, but can make the erosion of mould material and ladle liner aggravate; Air blowing treatment, is that the porous refractory by being contained in mould material is blown into argon gas, at slag lining, forms air curtain, and slag is not contacted with refractory materials, thereby realizes few dry slag, but the deficiency that exists ventilated element easily to stop up and damage.To the clinker removal method of dry slag on tubular stinger, be mainly to adopt mechanical doctor, but owing to there being cold steel in dry slag, mechanical removal is easy to make mould material to damage, and has greatly shortened the work-ing life of tubular stinger.Therefore, effectively reduce tubular stinger dry slag, contribute to extend the work-ing life of tubular stinger, thereby improve the production efficiency of RH device, play the effect of cost efficiency.
Summary of the invention
The object of the invention is to overcome short shortcoming of the easy dry slag of existing vacuum circulation degassing tubular stinger, work-ing life, provide a kind of that be difficult for dry slag and there is long-life vacuum circulation degassing tubular stinger.
According to thering is annular recesses on the outer wall of vacuum circulation degassing tubular stinger of the present invention, in this annular recesses, be provided with Al
2o
3-C brick.
Preferably, described Al
2o
3the composition of-C brick comprises Al
2o
3and C, and Al
2o
3with the weight percent of C be: 3.7-5:1.
Preferably, described tubular stinger comprises the steel construction structure of cast, on the outside surface of this steel construction, has Al
2o
3pouring layer, described annular recesses is formed at described Al
2o
3on the outer wall of pouring layer.
Preferably, on the outside surface of described steel construction, there is riveting part, described Al
2o
3on-C brick, have the through hole corresponding with described riveting part, described riveting part is inserted in described through hole.
Preferably, be embedded into the described Al in described annular recesses
2o
3the outer end of the through hole of-C brick adopts Al
2o
3the mixture shutoff of-C and pitch.
Preferably, be embedded into the described Al in described annular recesses
2o
3gap between-C brick adopts described Al
2o
3the mixture of-C and pitch is filled.
Preferably, the material of described riveting part adopts 20G, and a plurality of described riveting parts are distributed on the excircle of described steel construction.
Preferably, dark 100～120 millimeters of described annular recesses, and described annular recesses is 300～400 millimeters along the length of the length direction of this vacuum circulation degassing tubular stinger.
Preferably, the internal surface of described steel construction is coated with Mg-Cr brick layer, and the lower end of this Mg-Cr brick layer extends to the lower end mouth of pipe of described tubular stinger, the Cr of Mg-Cr brick in this Mg-Cr brick layer
2o
3content be 24～28%(weight percentage).
Preferably, described Al
2o
3the composition of pouring layer contains Al
2o
3, and optionally contain SiO
2, FeO and Na
2o, wherein, with respect to the Al of 100 weight parts
2o
3, SiO
2content be 0～0.5, FeO content is 0～0.5, Na
2the content of O is 0～0.55.
As mentioned above, according to the Al of vacuum circulation degassing tubular stinger of the present invention
2o
3pouring layer has annular recesses, in this annular recesses, embeds Al
2o
3-C brick, due to Al
2o
3-C refractory materials is difficult for being soaked by slag, thereby can reduce the dry slag of this vacuum circulation degassing tubular stinger, and is embedded into the Al in annular recesses
2o
3the outer end of the through hole of-C brick adopts Al
2o
3the mixture shutoff of-C and pitch, is embedded into the Al in annular recesses
2o
3gap between-C brick also adopts Al
2o
3the mixture of-C and pitch is filled, therefore can make full use of carbonaceous material, is difficult for the feature being soaked by slag, reduces slag erosion to this vacuum circulation degassing tubular stinger by described through hole and described gap.Therefore, adopt technical scheme of the present invention, can reduce the dry slag of vacuum outgas tubular stinger, and then extend its work-ing life, improve the production efficiency of RH device external refining.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.
Fig. 1 is according to the longitudinal sectional drawing of vacuum circulation degassing tubular stinger of the present invention.
Description of reference numerals
1 flange 2 steel construction
3 Al
2o
3pouring layer 4 Al
2o
3-C brick
5 Mg-Cr brick layer 6 riveting part
7 anchor flukes
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the present invention, for convenience of description, used some nouns of locality, such as " upper end ", " lower end ", " top ", " bottom " etc. conventionally all for direction shown in the drawings, or for each parts mutual alignment relationship description word of vertical or gravity direction.
Fig. 1 is according to the longitudinal sectional drawing of vacuum circulation degassing tubular stinger of the present invention.
As shown in Figure 1, according to the vacuum circulation degassing tubular stinger of present embodiment, comprise flange 1, steel construction 2, Al
2o
3pouring layer 3, Al
2o
3-C brick 4, Mg-Cr brick layer 5, riveting part 6 and anchor fluke 7.
Described flange 1 is connected in the upper end of steel construction 2, for vacuum circulation degassing tubular stinger is connected and is fixed with the vacuum chamber that is located thereon the RH device of portion.
Described steel construction 2 is cast, and material adopts 20G, in the present embodiment, and for guaranteeing steel construction 2 and inner Mg-Cr brick layer 5, outside Al
2o
3the coefficient of expansion between pouring layer 3 matches to prevent Mg-Cr brick layer 5 and Al
2o
3pouring layer 3 cracks, and the thickness of steel construction 2 is 24～27 millimeters.
Described Mg-Cr brick layer 5 covers on the internal surface of steel construction 2, adopts Cr
2o
3content is 24～28%(weight percentage) Mg-Cr brick, can resist washing away of the molten steel that flows through in the passage that Mg-Cr brick layer 5 forms, and, in the present embodiment, Mg-Cr brick layer 5 extends to the mouth of pipe of vacuum circulation degassing tubular stinger, to prevent the Al that thermal shock causes
2o
3al in pouring layer 3
2o
3peeling off of mould material.
Described Al
2o
3pouring layer 3 covers on the outside surface of steel construction 2, extends to the lower end mouth of pipe of vacuum circulation degassing tubular stinger, Al
2o
3the Al that pouring layer 3 adopts
2o
3the composition of mould material contains Al
2o
3, and optionally contain SiO
2, FeO and Na
2o, wherein, with respect to the Al of 100 weight parts
2o
3, SiO
2content be 0～0.5, FeO content is 0～0.5, Na
2the content of O is 0～0.55.Wherein, present embodiment improves Al
2o
3al in mould material
2o
3the content of composition contributes to improve Al
2o
3the thermostability of mould material.In addition, according to the Al of vacuum circulation degassing tubular stinger of the present invention
2o
3pouring layer 3 has annular recesses, when this vacuum circulation degassing tubular stinger being arranged on while processing molten steel on RH device, and the position that described annular recesses contacts with the slag covering in ladle on molten steel face in this vacuum circulation degassing pipe.Particularly, in the present embodiment, dark 100～200 millimeters of annular recesses, along the length of the length direction of vacuum circulation degassing tubular stinger, be 300～400 millimeters, and build and have Al in annular recesses
2o
3-C brick 4.
At above-mentioned Al
2o
3in pouring layer 3, Al
2o
3together with mould material is cast in anchor fluke 7, this anchor fluke 7 is welded on steel construction 2 in each mode on oppositely that is distributed in steel construction 2, and anchor fluke 7 can be eliminated stress that all directions produce to prevent Al
2o
3pouring layer 3 cracks or peels off, and the material of the anchor fluke in present embodiment adopts the thickness matching of 20G and length and pouring layer.
In the present embodiment, Al
2o
3-C brick 4 connects by riveting part 6 and is fixed on Al
2o
3in the annular recesses of pouring layer 3, particularly, Al
2o
3the composition of-C brick comprises Al
2o
3and C, and Al
2o
3with the weight percent of C be: 3.7-5:1, in addition, this Al
2o
3-C brick 4 also contains a small amount of additive and resin.In addition, at Al
2o
3on-C brick 4, there is the through hole matching well mutually with riveting part 6, thereby riveting part 6 makes Al through this through hole
2o
3-C brick 4 is fixed in annular recesses.
Particularly, a plurality of riveting parts 6 in present embodiment are welded on the slag lining of steel construction 2 and evenly arrange around the outside surface of steel construction 2, riveting part 6 materials are 20G, and specification is 18～22 millimeters of diameters, 70～90 millimeters of length, and the spacing between upper and lower two riveting parts 6 is 90～110 millimeters.
The embedding Al of vacuum circulation degassing tubular stinger according to the present invention in the annular recesses of slag lining
2o
3-C brick 4, because slag touches Al
2o
3the wetting angle of-C refractory materials is less than 90 °, makes Al
2o
3-C brick 4 is not easy to be soaked by slag, thereby has reduced the erosion of slag to vacuum circulation degassing tubular stinger, realizes the object that reduces dry slag simultaneously, and then improves the production efficiency of external refining.
In addition, be embedded into the Al in annular recesses
2o
3the outer end of the through hole of-C brick adopts Al
2o
3the mixture shutoff of-C and pitch, is embedded into the Al in annular recesses
2o
3gap between-C brick also adopts Al
2o
3the mixture of-C and pitch is filled, thereby make full use of carbonaceous material, is difficult for the feature being soaked by slag, reduces slag erosion to this vacuum circulation degassing tubular stinger by described through hole and described gap.
According to the manufacture craft of the vacuum circulation degassing tubular stinger of present embodiment, be: flange 1, a plurality of riveting part 6 and a plurality of anchor fluke 7 are welded on steel construction 2, wherein, flange 1 is connected in the top of steel construction 2, a plurality of riveting parts 6 are welded on the slag lining of steel construction 2, particularly, it in present embodiment, is the slag lining welding multi-turn riveting part 6 on the outside surface of steel construction 2, spacing between upper and lower riveting part 6 is 100 millimeters, a plurality of anchor flukes 7 are welded on the outside surface of steel construction 2 except being welded with the position of riveting part 6, guarantee that a plurality of anchor flukes 7 are towards different directions during welding; By the brick inside at steel construction 2 of Mg-Cr; Carry out Al
2o
3mould material cast, after cast, forms Al
2o
3pouring layer 3, and this Al
2o
3on pouring layer 3, there are one dark 100～200 millimeters, along the length of the length direction of vacuum circulation degassing tubular stinger, be the annular recesses of 300～400 millimeters, pour into a mould and carry out demoulding maintenance after one day, and the time of demoulding maintenance is not less than 2 days, then in being the ring mirror of 400～450 ℃, processes about 55～70 hours high dry temperature; After dry, the Al of the through hole mating with riveting part 6 will be there is
2o
3-C brick 4 is embedded in annular recesses by riveting part 6; By the Al being embedded in annular recesses
2o
3the outer end of the through hole of-C brick adopts Al
2o
3the mixture shutoff of-C and pitch, is embedded into the Al in annular recesses
2o
3gap between-C brick also adopts Al
2o
3the mixture of-C and pitch is filled; Finally, vacuum circulation degassing tubular stinger is connected with vacuum chamber by flange 1, toasts online, temperature is not less than 1000 ℃.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.In addition, each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a vacuum circulation degassing tubular stinger, is characterized in that, on the outer wall of this tubular stinger, has annular recesses, in this annular recesses, is provided with Al
2o
3-C brick (4).
2. vacuum circulation degassing tubular stinger according to claim 1, wherein, described Al
2o
3the composition of-C brick (4) comprises Al
2o
3and C, and Al
2o
3with the weight percent of C be: 3.7-5:1.
3. vacuum circulation degassing tubular stinger according to claim 1, wherein, described tubular stinger comprises the steel construction (2) of cast, on the outside surface of this steel construction (2), has Al
2o
3pouring layer (3), described annular recesses is formed at described Al
2o
3on the outer wall of pouring layer (3).
4. vacuum circulation degassing tubular stinger according to claim 3, wherein, has riveting part (6), described Al on the outside surface of described steel construction (2)
2o
3on-C brick (4), have the through hole corresponding with described riveting part (6), described riveting part (6) is inserted in described through hole.
5. vacuum circulation degassing tubular stinger according to claim 4, wherein, is embedded into the described Al in described annular recesses
2o
3the outer end of the through hole of-C brick (4) adopts Al
2o
3the mixture shutoff of-C and pitch.
6. according to the vacuum circulation degassing tubular stinger described in claim 1 or 3, wherein, be embedded into the described Al in described annular recesses
2o
3gap between-C brick (4) adopts described Al
2o
3the mixture of-C and pitch is filled.
7. vacuum circulation degassing tubular stinger according to claim 4, wherein, the material of described riveting part (6) adopts 20G, and a plurality of described riveting parts (6) are distributed on the excircle of described steel construction (2).
8. according to the vacuum circulation degassing tubular stinger described in claim 1 or 3, wherein, dark 100～120 millimeters of described annular recesses, and described annular recesses is 300～400 millimeters along the length of the length direction of this vacuum circulation degassing tubular stinger.
9. vacuum circulation degassing tubular stinger according to claim 3, wherein, the internal surface of described steel construction (2) is coated with Mg-Cr brick layer (5), and the lower end of this Mg-Cr brick layer (5) extends to the lower end mouth of pipe of described tubular stinger, the Cr of the Mg-Cr brick in this Mg-Cr brick layer (5)
2o
3content be 24～28%(weight percentage).
10. vacuum circulation degassing tubular stinger according to claim 3, wherein, described Al
2o
3the composition of pouring layer (3) contains Al
2o
3, and optionally contain SiO
2, FeO and Na
2o, wherein, with respect to the Al of 100 weight parts
2o
3, SiO
2content be 0～0.5, FeO content is 0～0.5, Na
2the content of O is 0～0.55.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307538.3A CN103045807B (en) | 2011-10-12 | 2011-10-12 | Vacuum circulation degassing insert tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307538.3A CN103045807B (en) | 2011-10-12 | 2011-10-12 | Vacuum circulation degassing insert tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103045807A CN103045807A (en) | 2013-04-17 |
| CN103045807B true CN103045807B (en) | 2014-05-07 |
Family
ID=48058666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110307538.3A Active CN103045807B (en) | 2011-10-12 | 2011-10-12 | Vacuum circulation degassing insert tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103045807B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032097B (en) * | 2014-07-02 | 2016-03-30 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof |
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|---|---|---|---|---|
| CN201525862U (en) * | 2009-11-20 | 2010-07-14 | 武汉钢铁(集团)公司 | Novel insert tube for RH vacuum device |
| CN201534865U (en) * | 2009-09-30 | 2010-07-28 | 鞍钢股份有限公司 | Insert tube for RH refining |
| CN201648450U (en) * | 2010-04-22 | 2010-11-24 | 武汉钢铁(集团)公司 | Vacuum treatment inserting pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3332786B2 (en) * | 1997-03-21 | 2002-10-07 | トヨノセラテック株式会社 | Ceramic filter |
| JPH10310816A (en) * | 1997-05-07 | 1998-11-24 | Nippon Steel Corp | Immersion tube |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201534865U (en) * | 2009-09-30 | 2010-07-28 | 鞍钢股份有限公司 | Insert tube for RH refining |
| CN201525862U (en) * | 2009-11-20 | 2010-07-14 | 武汉钢铁(集团)公司 | Novel insert tube for RH vacuum device |
| CN201648450U (en) * | 2010-04-22 | 2010-11-24 | 武汉钢铁(集团)公司 | Vacuum treatment inserting pipe |
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| Title |
|---|
| JP特开平10-263339A 1998.10.06 |
| JP特开平10-310816A 1998.11.24 |
| RH插入管刚玉-尖晶石浇注料研制与应用;朱伯铨;《炼钢》;20000229;第16卷(第1期);第20-22页 * |
| RH真空处理装置用耐火材料初探;徐国涛等;《钢铁研究》;19940331(第2期);第45-50页 * |
| 周斌.攀钢RH真空精炼炉用耐火材料的长寿化实践.《耐火材料》.2009,第43卷(第4期),第300-302页. |
| 徐国涛等.RH真空处理装置用耐火材料初探.《钢铁研究》.1994,(第2期),第45-50页. |
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|---|---|
| CN103045807A (en) | 2013-04-17 |
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