JPH0654759U - Circulation pipe for vacuum degassing equipment - Google Patents
Circulation pipe for vacuum degassing equipmentInfo
- Publication number
- JPH0654759U JPH0654759U JP22893U JP22893U JPH0654759U JP H0654759 U JPH0654759 U JP H0654759U JP 22893 U JP22893 U JP 22893U JP 22893 U JP22893 U JP 22893U JP H0654759 U JPH0654759 U JP H0654759U
- Authority
- JP
- Japan
- Prior art keywords
- brick
- vacuum degassing
- bricks
- pipe
- degassing equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
(57)【要約】
【目的】 複数層の煉瓦を一体構造とすることにより構
成煉瓦の早期損傷の防止を図った真空脱ガス設備用環流
管を提供する。
【構成】 真空脱ガス設備における環流管において、環
流管を構成する内巻煉瓦15、または内巻煉瓦15およ
び中巻煉瓦16と外巻煉瓦17とを一体に構成した筒体
18に形成し、この筒体18を外殻鉄皮9内に挿入固定
したことを特徴とする。
(57) [Abstract] [Purpose] To provide a reflux pipe for a vacuum degassing equipment, which is intended to prevent early damage to constituent bricks by integrating bricks of multiple layers. In a recirculation pipe in a vacuum degassing facility, an inner winding brick 15 forming the recirculation pipe or a cylindrical body 18 in which an inner winding brick 15 and an inner winding brick 16 and an outer winding brick 17 are integrally formed, The cylindrical body 18 is characterized in that it is inserted and fixed in the outer shell iron shell 9.
Description
【0001】[0001]
本考案は真空脱ガス設備用環流管に関する。 The present invention relates to a reflux pipe for vacuum degassing equipment.
【0002】[0002]
真空脱ガス設備、なかでもRH式真空脱ガス設備は、図5に略示するように脱 ガス槽1の下部槽2の下部に吸上げ用と排出用との2本の浸漬管3,4を有し、 この浸漬管3,4を取鍋5内の溶鋼6に浸漬して槽内を真空にし、一方の浸漬管 からアルゴンまたは窒素等のガスを吹込むことにより溶鋼を槽内に流入、循環さ せて脱ガスするものであり、脱ガスされた溶鋼は他方の浸漬管から排出させて取 鍋内に戻される。これを続けることにより脱ガスがなされる。 The vacuum degassing equipment, especially the RH type vacuum degassing equipment, has two dipping pipes 3, 4 for sucking and discharging at the lower part of the lower tank 2 of the degassing tank 1 as schematically shown in FIG. The immersion pipes 3 and 4 are immersed in the molten steel 6 in the ladle 5 to evacuate the tank, and a gas such as argon or nitrogen is blown from one of the immersion tubes to flow the molten steel into the tank. It is circulated for degassing, and the degassed molten steel is discharged from the other immersion pipe and returned to the ladle. Degassing is performed by continuing this.
【0003】 このような真空脱ガス設備に用いられる環流管7,8は槽の底部に設けられ、 槽内と浸漬管との間に位置されるので、浸漬管3,4のように簡単に交換するこ とは不可であり、そのため損傷しにくい構造とすることが必要となり、適正な材 質の選択、ライニングの施工がなされる。The reflux tubes 7 and 8 used in such vacuum degassing equipment are provided at the bottom of the tank and are located between the tank and the dip tube, so that the dip tubes 3 and 4 can be easily replaced. It is not possible to replace it, so it is necessary to make it a structure that is not easily damaged, and proper material selection and lining construction will be performed.
【0004】 各部のライニングの寿命は、一般に溶鋼の流速が最大になる部分でもありかつ 気泡の爆裂等もあって、環流管7の下部槽2内開口部分aが最も損傷しやすく、 その損傷度合いによって使用寿命が決定される。The life of the lining of each part is generally the part where the flow velocity of molten steel is the maximum, and also due to the explosion of bubbles and the like, the opening part a in the lower tank 2 of the reflux pipe 7 is most easily damaged, and the degree of damage is The service life is determined by.
【0005】 一方、環流管の施工は、該部の外殻鉄皮9内の狭くて足場の悪い箇所での作業 となるため、正確な施工が難しく、それ故従来では、例えば図6に断面を、図7 に平面を示すように円周方向を複数に分割した横迫り煉瓦からなる内巻煉瓦10 、または内巻煉瓦10と中巻煉瓦11とを複数段に積重ねて一層または2層から なる円筒状構造とし、これを例えば実開平3−99750号公報に記載のような 手段(図8)の押え金物12と受け金物13とをボルト14で締付けて煉瓦群を 上下から挟持するセット金物を用いて配設し、その外周囲に円周方向を複数に分 割された外巻煉瓦を後から配置することによって環流管を構築するようになされ ている。On the other hand, the construction of the return flow pipe is a work in a narrow and unscaffolding place in the outer shell iron shell 9 of the portion, so that it is difficult to perform the construction accurately. The inner-wall brick 10 is made of laterally-applied bricks whose circumferential direction is divided into a plurality of pieces as shown in the plan view in FIG. 7, or the inner-wall brick 10 and the middle-wall brick 11 are stacked in multiple stages to form one or two layers. This is a cylindrical metal structure, and this is a set metal product that clamps a brick group from above and below by tightening a presser member 12 and a receiver member 13 of means (FIG. 8) as described in Japanese Utility Model Laid-Open No. 3-99750 with bolts 14. The recirculation pipe is constructed by arranging the outer bricks and arranging the outer bricks, which are divided into a plurality of pieces in the circumferential direction, on the outer periphery thereof.
【0006】[0006]
しかしながら上記のRH式真空脱ガス設備の下部槽2の底部は、浸漬管を取鍋 内の溶鋼に浸漬して真空脱ガスを行なうと、溶鋼が保有する高温と溶鋼の環流に 伴なう衝撃的な乱流によって生じる損耗、あるいは繰返し使用による急熱・急冷 によっての摩耗、スポーリングの発生、助長による損耗が起こる。特に環流管の 開口部分aは、溶鋼が環流することにより図5に斜線で示したように内周面から 上面にかけて先行損傷し、断面朝顔状になり、内巻煉瓦、または内巻煉瓦と中巻 煉瓦の上部外周に外巻煉瓦を後から配置して補強を図ってはいても、前述したよ うにこの部分の外殻鉄皮9内という狭くて足場の悪い箇所での外巻煉瓦の施工が 難しく、そのため目地部に緩みが生じやすく、環流する溶鋼に洗われて加速的に 損傷が進行するという問題点がある。 However, at the bottom of the lower tank 2 of the above-mentioned RH type vacuum degassing equipment, when a dip tube is immersed in the molten steel in the ladle for vacuum degassing, the high temperature of the molten steel and the impact caused by the recirculation of the molten steel Wear caused by general turbulence, wear due to rapid heating and quenching due to repeated use, spalling, and wear due to promotion. In particular, as the molten steel circulates, the opening part a of the reflux pipe is pre-damaged from the inner peripheral surface to the upper surface as shown by the diagonal lines in Fig. 5, and becomes a morning glory cross section. Even if an outer wound brick is placed on the outer circumference of the upper part of the wound brick for the purpose of reinforcement, the outer wound brick is constructed in the outer shell iron shell 9 of this portion in a narrow and unscaffolded place as described above. However, there is a problem in that the joints are apt to loosen, and the molten steel is washed by the circulating fluid to accelerate the damage.
【0007】 特に下部槽の外殻鉄皮9は、加熱、冷却の繰返しに合わせて膨張、収縮する。 この膨張収縮は下部槽2の底部の外殻鉄皮9より垂直に突出する2本の環流管7 ,8部分が「ハ」の字状に開いたり閉じたりする方向に変位する。これに応じて 外殻鉄皮内に施工された外巻煉瓦も連動して動くことになり、目地が緩んでいる とそれだけ動きが大きくなって目地切れが生じやすくなり、前述の問題点が一層 顕著に現われることになる。In particular, the outer shell iron shell 9 of the lower tank expands and contracts in accordance with repeated heating and cooling. Due to this expansion and contraction, the two reflux tubes 7 and 8 projecting vertically from the outer shell iron shell 9 at the bottom of the lower tank 2 are displaced in the direction of opening and closing in a “C” shape. In response to this, the outer bricks installed inside the outer shell will also move in conjunction with each other, and if the joints are loose, the movement will increase so much that the joints will be prone to breakage. It will be noticeable.
【0008】 本考案はこれに鑑み、上記従来技術における外巻煉瓦の施工上の問題および使 用上の現象から外巻煉瓦を含む煉瓦群が早期に損傷することを確実に防止するこ とを可能とする真空脱ガス設備用環流管を提供することを目的とする。In view of this, the present invention reliably prevents early damage to the brick group including the outer wound brick from the above-mentioned problems in construction of the outer wound brick and phenomena in use. It is an object to provide a recirculation pipe for a vacuum degassing facility that enables it.
【0009】[0009]
上記従来の技術が有する問題点を解決する手段として、本考案は、真空脱ガス 設備における環流管において、環流管を構成する内巻煉瓦、または内巻煉瓦およ び中巻煉瓦と外巻煉瓦とを一体に構成した筒体に形成し、この筒体を外殻鉄皮内 に挿入固定したことを特徴とする。 As a means for solving the problems of the above-mentioned conventional techniques, the present invention provides an inner-flow brick, or an inner-wind brick, an inner-wind brick, and an outer-wind brick that constitute the free-flow tube in a free-flow tube in a vacuum degassing facility. It is characterized in that and are formed into an integrally configured cylindrical body, and this cylindrical body is inserted and fixed in the outer shell.
【0010】[0010]
施工前に内巻煉瓦と外巻煉瓦、または内巻煉瓦、中巻煉瓦と外巻煉瓦とが一体 構成とされた筒体を外殻鉄皮内にセットするので、下部層底部の外殻鉄皮が取鍋 内の溶鋼の輻射熱を受けて膨張しても外巻煉瓦は内巻煉瓦、または内巻煉瓦と中 巻煉瓦に一体化されていることにより目地切れ等を生じることがなく、目地損傷 に起因する煉瓦の損耗の発生や増進が生じない。 Before the construction, the inner and outer wound bricks, or the inner and outer wound bricks and the inner and outer wound bricks are integrally set in the outer shell, so that the outer shell iron at the bottom of the lower layer is set. Even if the skin expands due to the radiant heat of molten steel in the ladle, the outer-wrapped brick is integrated with the inner-wrapped brick, or the inner-wrapped brick and the middle-wrapped brick, so that no joint breakage occurs. Brick wear and damage due to damage does not occur or increase.
【0011】[0011]
以下、本考案を図面に示す実施例を参照して説明する。 The present invention will be described below with reference to the embodiments shown in the drawings.
【0012】 図1は本考案を3層構造の環流管とした場合の一例の断面を示し、図2は一方 の環流管の平面を示しており、この環流管は、円周方向に複数個に分割された煉 瓦15aを環状に配置した内巻煉瓦15と、同じく円周方向に複数個に分割され た煉瓦16aを環状に配置した中巻煉瓦16と、同じく円周方向に複数個に分割 された煉瓦17aを環状に配置した外巻煉瓦17とからなっていて、これらは施 工前に一体構造物の筒体18として構成されている。FIG. 1 shows a cross section of an example in which the present invention is used as a three-layer recirculation pipe, and FIG. 2 shows a plane of one recirculation pipe. The plurality of recirculation pipes are arranged in the circumferential direction. The inner winding brick 15 in which the bricks 15a divided into two are annularly arranged, the middle winding brick 16 in which a plurality of bricks 16a similarly divided in the circumferential direction are annularly arranged, and the plurality of bricks 16a in the circumferential direction are also divided. The brick 17a is divided into outer bricks 17a arranged in a ring shape, and these bricks 17a are formed as a single-body cylinder 18 before processing.
【0013】 この一体構造化の手段としては、煉瓦間にモルタルを介在させて組立て、外周 にバンド掛けして締着した状態で乾燥させ、一体的に結合するこによって筒体1 8を形成するようにしている。As a means for this integral structure, the bricks are assembled by assembling them with mortar interposed between the bricks, banding them on the outer periphery and drying them in a tightly fastened state, and integrally joining them to form the cylindrical body 18. I am trying.
【0014】 上記外巻煉瓦17は、環流管の外周部に位置する外殻鉄皮9の底部上に敷設さ れる敷煉瓦19の上下方向の長さよりも若干長く形成されており、外巻煉瓦17 の下部と外殻鉄皮9との間に充填する不定形耐火物20の充填層を極力少なくし 、耐用性の向上を図るようにしている。そして外巻煉瓦17の下端は傾斜面21 とされており、中巻煉瓦16と接触する長さをより長くなるように形成されてい る。The above-mentioned outer brick 17 is formed to be slightly longer than the vertical length of the brick 19 laid on the bottom of the outer shell iron shell 9 located on the outer periphery of the reflux pipe. The filling layer of the amorphous refractory material 20 to be filled between the lower part of 17 and the outer shell iron shell 9 is made as small as possible to improve the durability. The lower end of the outer brick 17 is formed as an inclined surface 21 so that the length of contact with the inner brick 16 is longer.
【0015】 一方、筒体18の外巻煉瓦17は、前記敷煉瓦19との取り合わせをよくする ため、図2、図4のように外形が八角形状になるように煉瓦形状を定めている。 なおこの形状については、このほか変則四角形、円形、図4のB部に一部を示す ような花弁状とするなどの形態を選択することができる。On the other hand, the outer winding brick 17 of the tubular body 18 has a brick shape so as to have an octagonal outer shape as shown in FIGS. In addition to this, other shapes such as an irregular quadrangle, a circle, and a petal shape partially shown in a portion B of FIG. 4 can be selected.
【0016】 上記のように構成される一体構造の筒体18は、従来と同様に外巻煉瓦17を 含んで一体化された筒体18の上下を押え金物12と受け金物13とで挟持する ようボルト14でセットし、これを吊持して所定の箇所に装入し、外殻鉄皮9と 外巻煉瓦17との間および所要の箇所に不定形耐火物を所定位置まで充填するこ とにより固定する。The tubular body 18 of the integral structure configured as described above holds the upper and lower sides of the tubular body 18 including the outer winding brick 17 and integrated with each other by the presser metal 12 and the metal receiver 13 as in the conventional case. Set with bolts 14 and hang it up and insert it into the specified place, and fill the irregular refractory up to the specified position between the outer shell 9 and the outer brick 17 and the required place. Fix by and.
【0017】 図示の実施例では環流管を構成する筒体18を3層構造とした場合について説 明したが、2層または4層以上とすることもでき、また内巻煉瓦15を複数段に 積重ねたもの、あるいは中巻煉瓦16を複数段に積重ねたものを複数層として環 流管を構成することができる。In the illustrated embodiment, the case where the tubular body 18 constituting the reflux pipe has a three-layer structure has been described, but it may have two layers or four layers or more, and the inner bricks 15 may have a plurality of stages. The reflux pipe can be formed by stacking the stacks or stacking the middle-sized bricks 16 in multiple stages to form multiple layers.
【0018】[0018]
以上説明したように本考案によれば、真空脱ガス設備における環流管において 、この環流管を構成する内巻煉瓦と外巻煉瓦、または内巻、中巻煉瓦と外巻煉瓦 とを予め一体構造物の筒体として外殻鉄皮内の所定箇所へセットするようにした ので、煉瓦が強固に一体化され、槽の底部の外殻鉄皮が溶鋼の輻射熱を受けて膨 張しても一体化された煉瓦の強度によって個々の煉瓦の変形度合いが少なくなり 、環流する溶鋼によって洗われても目地開きによって目地溶損の進行による損傷 速度が加速度的に増すことが防止され、耐久性を大幅に向上することができる。 As described above, according to the present invention, in the reflux pipe in the vacuum degassing equipment, the inner brick and the outer brick constituting the reflux pipe or the inner roll, the middle brick and the outer brick are integrally structured in advance. Since it was set as a cylindrical body of the object at a predetermined position in the outer shell, the brick was firmly integrated, and even if the outer shell of the bottom of the tank expanded by receiving radiant heat of molten steel The strength of the solidified bricks reduces the degree of deformation of individual bricks, and even if the bricks are washed by the circulating molten steel, the joint opening prevents the damage rate from accelerating and increasing due to the progress of joint melt loss, thus greatly improving durability. Can be improved.
【0019】 また外巻煉瓦の長さを敷煉瓦よりも長くしたことにより、内巻煉瓦または中巻 煉瓦に亀裂が発生しても地金の浸入が防がれ、環流管、延いては下部槽全体の耐 用寿命を大幅に延長することができる。Further, by making the length of the outer wound brick longer than that of the laid brick, even if a crack occurs in the inner wound brick or the middle wound brick, invasion of the metal is prevented, and the reflux pipe, and thus the lower portion. The service life of the entire tank can be greatly extended.
【図1】本考案による一体構造化された環流管用筒体の
断面図。FIG. 1 is a sectional view of an integrally structured tubular body for a reflux pipe according to the present invention.
【図2】図1の筒体の平面図。FIG. 2 is a plan view of the cylindrical body of FIG.
【図3】図1の筒体を下部槽に施工した状態の一部の断
面図。FIG. 3 is a partial cross-sectional view of a state where the tubular body of FIG. 1 is installed in a lower tank.
【図4】図3のA−A矢視平面図。FIG. 4 is a plan view taken along the line AA of FIG.
【図5】本考案を適用する真空脱ガス設備の概要および
従来の不具合い箇所を示す断面図。FIG. 5 is a cross-sectional view showing an outline of a vacuum degassing equipment to which the present invention is applied and a conventional defective portion.
【図6】従来の環流管構造を示す断面図。FIG. 6 is a cross-sectional view showing a conventional reflux pipe structure.
【図7】同、平面図。FIG. 7 is a plan view of the same.
【図8】従来の吊込み手段を示す断面図。FIG. 8 is a cross-sectional view showing a conventional hanging means.
1 脱ガス槽 2 下部槽 3,4 浸漬管 7,8 環流管 9 外殻鉄皮 10,15 内巻煉瓦 11,16 中巻煉瓦 17 外巻煉瓦 18 筒体 19 敷煉瓦 20 不定形耐火物 21 傾斜面 1 Degassing tank 2 Lower tank 3,4 Immersion pipe 7,8 Recirculation pipe 9 Outer shell iron shell 10,15 Inner winding brick 11,16 Middle winding brick 17 Outer winding brick 18 Cylindrical body 19 Floor brick 20 Irregular refractory material 21 Slope
Claims (2)
環流管を構成する内巻煉瓦、または内巻煉瓦および中巻
煉瓦と外巻煉瓦とを一体に構成した筒体に形成し、この
筒体を外殻鉄皮内に挿入固定したことを特徴とする真空
脱ガス設備用環流管。1. A reflux pipe in a vacuum degassing facility,
The invention is characterized in that the inner-wall bricks forming the reflux pipe or the inner-wall bricks and the inner-wall bricks and the outer-wall bricks are integrally formed into a tubular body, and the tubular body is inserted and fixed in the outer shell iron shell. Circulation pipe for vacuum degassing equipment.
請求項1記載の真空脱ガス設備用環流管。2. The recirculation pipe for a vacuum degassing facility according to claim 1, wherein the length of the outer brick is longer than that of the floor brick.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22893U JPH0654759U (en) | 1993-01-08 | 1993-01-08 | Circulation pipe for vacuum degassing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22893U JPH0654759U (en) | 1993-01-08 | 1993-01-08 | Circulation pipe for vacuum degassing equipment |
Publications (1)
Publication Number | Publication Date |
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JPH0654759U true JPH0654759U (en) | 1994-07-26 |
Family
ID=11468110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP22893U Pending JPH0654759U (en) | 1993-01-08 | 1993-01-08 | Circulation pipe for vacuum degassing equipment |
Country Status (1)
Country | Link |
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JP (1) | JPH0654759U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022024794A (en) * | 2020-07-28 | 2022-02-09 | 東京窯業株式会社 | Circulation tube |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6440888A (en) * | 1987-08-06 | 1989-02-13 | Matsushita Electric Ind Co Ltd | Color el display device |
-
1993
- 1993-01-08 JP JP22893U patent/JPH0654759U/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6440888A (en) * | 1987-08-06 | 1989-02-13 | Matsushita Electric Ind Co Ltd | Color el display device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022024794A (en) * | 2020-07-28 | 2022-02-09 | 東京窯業株式会社 | Circulation tube |
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