JP2878438B2 - Lining structure of vacuum degassing device intermediate tank - Google Patents
Lining structure of vacuum degassing device intermediate tankInfo
- Publication number
- JP2878438B2 JP2878438B2 JP29679490A JP29679490A JP2878438B2 JP 2878438 B2 JP2878438 B2 JP 2878438B2 JP 29679490 A JP29679490 A JP 29679490A JP 29679490 A JP29679490 A JP 29679490A JP 2878438 B2 JP2878438 B2 JP 2878438B2
- Authority
- JP
- Japan
- Prior art keywords
- lining
- intermediate tank
- vacuum degassing
- lining structure
- refractory
- 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.)
- Expired - Lifetime
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は製鋼設備における溶鋼真空脱ガス装置の中間
槽のライニング構造に関する。Description: TECHNICAL FIELD The present invention relates to a lining structure of an intermediate tank of a vacuum degassing apparatus for molten steel in a steel making facility.
この中間槽は耐火れんがによる内張り構造を有してお
り、れんが熱膨張時の膨張吸収代およびれんが接着剤と
して耐火モルタルが使用されている。この真空脱ガス装
置中間層の内張りは直接溶鋼と接触することはないもの
の、減圧下で飛散した約1650℃の高温スプラッシュによ
る溶損が生じる。This intermediate tank has a lining structure made of refractory brick, and refractory mortar is used as an expansion absorption allowance at the time of brick thermal expansion and a brick adhesive. Although the lining of the intermediate layer of the vacuum degassing device does not come into direct contact with the molten steel, it melts due to a high temperature splash of about 1650 ° C. scattered under reduced pressure.
また、このスプラッシュは内張り表面に付着する。こ
の付着物による中間槽の孔部の閉塞を防止するため酸素
による溶融除去洗浄を行う必要があるが、この時1700℃
以上の温度で再溶融したスプラッシュによる溶損も見ら
れる。This splash also adheres to the lining surface. It is necessary to perform melting removal cleaning with oxygen in order to prevent clogging of the hole in the intermediate tank due to the deposits.
Melting due to the re-melted splash at the above temperature is also observed.
このような、内張りれんがの溶損時にはれんが目地部
の選択的損耗によるれんがコーナー部の細りによるれん
がの脱落が生じ、一部れんがが脱落すると内張りれんが
全体の緩みとなって内張りれんが全体を張り換えねばな
らない場合もある。In the case of such erosion of the lining brick, the bricks fall off due to the selective wear of the joints of the bricks, and the bricks come off due to the thinning of the corners.If some of the bricks fall off, the lining bricks become loose and the entire lining bricks are replaced. Sometimes you have to.
れんがの脱落を招くもう１つの因子として、鉄皮温度
上昇に起因する鉄皮の膨張変形がある。Another factor that causes the brick to fall off is the expansion and deformation of the steel shell due to an increase in the temperature of the steel shell.
これらのれんがの脱落を防止する手段として、不定形
耐火物を内張り表面全体に施工して目地なし一体化ライ
ニングを形成することも試みられている。ところが、目
地なし一体化ライニングの場合には熱膨張に対する吸収
代がなく、また、その背面は鉄皮で拘束されているた
め、一体化ライニングが熱膨張した場合、応力が働き破
壊へとつながるといった問題がある。また、下部槽取替
え時には下端の押さえがなくなり、ライニングが落下す
る恐れもある。As a means for preventing the falling off of these bricks, it has been attempted to apply an amorphous refractory to the entire lining surface to form a jointless integrated lining. However, in the case of a jointless lining without joints, there is no absorption allowance for thermal expansion, and since the back surface is constrained by a steel shell, when the integrated lining thermally expands, stress acts and leads to breakage. There's a problem. Further, when the lower tank is replaced, the lower end is not pressed down, and the lining may fall.
本発明において解決しようとする課題は、従来の真空
脱ガス中間槽におけるライニングの問題を解消すること
にあり、とくに上記不定形耐火物による目地なし一体化
ライニングの場合の熱膨張による脱落を防止するための
手段を見出すことにある。The problem to be solved in the present invention is to solve the problem of the lining in the conventional vacuum degassing intermediate tank, and in particular, to prevent dropout due to thermal expansion in the case of the jointless lining made of the irregular shaped refractory. Finding the means to do it.
本発明は、鉄皮内面には断熱可縮ボードを、また、稼
働面側には内張り表面全体に目地なし一体化ライニング
として施工した不定形耐火物を配した真空脱ガス中間槽
のライニング構造である。また、不定形耐火物中には不
定形耐火物の支持のための耐火物製アンカーブロックを
設置する。The present invention is a lining structure of a vacuum degassing intermediate tank in which a heat-insulating shrinkable board is provided on the inner surface of a steel shell, and an irregular-shaped refractory constructed as a jointless lining on the entire lining surface is provided on the working surface side. is there. In addition, a refractory anchor block for supporting the irregular refractory is installed in the irregular refractory.
本発明に使用する不定形耐火物としては、Al2O3,MgO,
スピネル,Cr2O3等の酸化物を単独又は２種以上組み合わ
せた高融点耐火物が適用可能である。As the amorphous refractory used in the present invention, Al 2 O 3 , MgO,
A high melting point refractory in which oxides such as spinel and Cr 2 O 3 are used alone or in combination of two or more kinds can be applied.
本発明に使用する断熱可縮ボードは、膨張吸収材およ
び断熱材としての役割を果たしており、この両面を備え
たものでなければならない。具体的にいえば、熱伝導率
が0.3Kcal/m・hr・℃以下で、可縮率が20％以上のもの
が適用可能である。熱伝導率が0.3Kcal/m・hr・℃超で
あれば断熱効果が低いためボードの厚みを厚くせねばな
らず、また、可縮率が20％未満であれば適性膨張代確保
のためにボードの厚みを厚くせねばならず、相対的にラ
イニング材の厚みが薄くなり耐用上問題がある。The heat-shrinkable heat-insulating board used in the present invention plays a role as an expansion-absorbing material and a heat insulating material, and must have both surfaces. Specifically, those having a thermal conductivity of 0.3 Kcal / m · hr · ° C. or less and a shrinkage of 20% or more are applicable. If the thermal conductivity is more than 0.3 Kcal / m · hr · ° C, the heat insulation effect is low and the thickness of the board must be increased, and if the shrinkage is less than 20%, the appropriate expansion allowance is secured. The thickness of the board must be increased, and the thickness of the lining material becomes relatively thin, which causes a problem in durability.
本発明に使用するアンカーブロックは、不定形ライニ
ングを支持するに十分な強度を有することが必要であ
り、その配置は中間槽の形状に応じて、例えば高さ方向
１段あるいは２段、円周方向８個〜16個と配置を選択す
ることによって不定形ライニングを支持するに十分な強
度を持たせることができる。アンカーブロックの材質と
しては、前述の不定形ライニング材同様、Al2O3,MgO,ス
ピネル,Cr2O3等の酸化物を単独又は２種以上組み合わせ
た高融点耐火れんが又は不定形プレキャストが適用可能
である。好ましくは、アンカーブロックと不定形ライニ
ング材との膨張特性の相違に起因する亀裂を防止するた
め、不定形ライニング材と同材質の不定形プレキャスト
が良い。The anchor block used in the present invention needs to have sufficient strength to support the irregular-shaped lining, and its arrangement is, for example, one step or two steps in the height direction, the circumference, depending on the shape of the intermediate tank. By selecting an arrangement of 8 to 16 directions, sufficient strength can be provided to support the irregular lining. As for the material of the anchor block, high melting point refractory brick or amorphous precast, which is used alone or in combination of two or more oxides, such as Al 2 O 3 , MgO, spinel, Cr 2 O 3, is applied as in the above-mentioned amorphous lining material. It is possible. Preferably, an amorphous precast made of the same material as the amorphous lining material is used in order to prevent cracks due to the difference in expansion characteristics between the anchor block and the amorphous lining material.
実施例１ 第１図は本発明の第１の実施例を示し、第２図は第１
図に示すアンカーブロッの配設状態を示す平面図であ
る。Embodiment 1 FIG. 1 shows a first embodiment of the present invention, and FIG.
It is a top view which shows the arrangement state of the anchor block shown in the figure.
同図において、鉄皮１の内側に熱伝導率0.1kcal/m・h
r・℃、可縮率30％、厚み25mmの断熱可縮ボード２を配
し、その間にアンカーブロック３を高さ方向１段、円周
方向12個配置した例である。断熱可縮ボード２内面とア
ンカーブロック３との間に不定形ライニング材４を施し
た状態を示す。アンカーブロック３および不定形ライニ
ング材４ともにAl2O3 94％のキャスタブルを使用した。In the same figure, the heat conductivity is 0.1 kcal / m · h inside the steel shell 1.
This is an example in which a heat-insulating shrinkable board 2 having r.degree. C., a shrinkage ratio of 30%, and a thickness of 25 mm is arranged, and an anchor block 3 is arranged at one level in the height direction and 12 in the circumferential direction. A state in which an irregular lining material 4 is applied between the inner surface of the heat-insulating shrinkable board 2 and the anchor block 3 is shown. For the anchor block 3 and the irregular-shaped lining material 4, castable Al 2 O 3 94% was used.
実施例２ 第３図は本発明の第２の実施例を示し、第４図は第３
図に示すアンカーブロックの配設状態を示す平面図であ
る。Embodiment 2 FIG. 3 shows a second embodiment of the present invention, and FIG.
It is a top view which shows the arrangement | positioning state of the anchor block shown in a figure.
これらの図において、鉄皮１の内側に熱伝導率0.1Kca
l/m・hr・℃、可縮率30％、厚み50mmの断熱可縮ボード
２を配し、アンカーブロック３を高さ方向２段、円周方
向12個配置した例である。不定形ライニング材４および
アンカーブロック３ともにAl2O3 40％のキャスタブルを
使用している。ここで、実施例１に比べて断熱可縮ボー
ドの厚みが厚く、また、アンカーブロックの個数が多い
のは、実施例２の材料が実施例１の材料に比べて膨張が
大きく、かつ、強度が弱いためである。In these figures, the heat conductivity of 0.1 Kca
This is an example in which a heat insulating shrinkable board 2 having l / m · hr · ° C., a shrinkage ratio of 30%, and a thickness of 50 mm is arranged, and two anchor blocks 3 are arranged in a height direction and 12 in a circumferential direction. Both the amorphous lining material 4 and the anchor block 3 are made of castable Al 2 O 3 40%. Here, the reason why the thickness of the heat-insulating shrinkable board and the number of the anchor blocks are larger than that of the first embodiment is that the material of the second embodiment has a larger expansion than the material of the first embodiment and has a higher strength. Is weak.
実施例２のライニング構造をRH真空脱ガス装置中間槽
で実施、現在使用中であるが、鉄皮表面温度も従来れん
がライニング305℃と比較して270℃と低く、断熱の効果
が見られる。また、目地なし一体構造のため局部的損傷
も見られず、下部槽取替え時も十分な支持力を有してい
る。The lining structure of Example 2 was implemented in an intermediate tank of an RH vacuum degassing apparatus, and is currently in use. However, the surface temperature of the steel shell is 270 ° C. lower than that of the conventional brick lining of 305 ° C., and the heat insulating effect is seen. In addition, there is no local damage due to the integrated structure without joints, and it has sufficient supporting force even when replacing the lower tank.
本発明は、膨張吸収代および断熱材として不定形耐火
物と鉄皮の間に断熱可縮ボードを設置し、また、不定形
ライニングの支持のためのアンカーブロックを設置した
ため、特に不定形耐火物による目地なし一体化ライニン
グの場合の熱膨張による脱落を防止することが可能にな
った。The present invention provides a heat-insulating shrinkable board between an irregular-shaped refractory and a steel shell as an expansion absorption allowance and a heat insulating material, and an anchor block for supporting an irregular-shaped lining. It is possible to prevent falling off due to thermal expansion in the case of an integrated lining without joints.
添付各図は本発明のライニング構造を示す。第１図は第
１の実施例を示し、第２図は第１図に示すアンカーブロ
ックの配設状態を示す平面図である。 第３図は第２の実施例を示し、第４図は第３図に示すア
ンカーブロックの配設状態を示す平面図である。 １……鉄皮、2:断熱可縮ボード 3:アンカーブロック、4:不定形ライニング材The accompanying drawings show the lining structure of the present invention. FIG. 1 shows a first embodiment, and FIG. 2 is a plan view showing an arrangement state of the anchor blocks shown in FIG. FIG. 3 shows the second embodiment, and FIG. 4 is a plan view showing the arrangement of the anchor blocks shown in FIG. 1 ... Steel, 2: Insulated shrinkable board 3: Anchor block, 4: Irregular lining material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤井 幸一郎 広島県呉市昭和町11番１号 日新製鋼株 式會社呉製鉄所内 (72)発明者 谷口 忠行 広島県呉市昭和町11番１号 日新製鋼株 式會社呉製鉄所内 (56)参考文献 特開 昭63−247310（ＪＰ，Ａ) 実開 昭61−120749（ＪＰ，Ｕ) 実公 平１−7705（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.6，ＤＢ名) C21C 7/10 C22B 9/04 F27D 1/00 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koichiro Fujii 111-1 Showa-cho, Kure-shi, Hiroshima Nisshin Steel Co., Ltd. Inside Kure Works of Steel Company (72) Inventor Tadayuki Taniguchi 111-1 Showa-cho, Kure-shi, Hiroshima Nisshin Steel Co., Ltd. Kure Works (56) References JP-A-63-247310 (JP, A) JP-A-61-120749 (JP, U) Jikohei 1-7705 (JP, Y2) (58) Field surveyed (Int.Cl. 6 , DB name) C21C 7/10 C22B 9/04 F27D 1/00
Claims (3)
働面側には内張り表面全体に目地なし一体化ライニング
として施工した不定形耐火物を配した真空脱ガス中間槽
のライニング構造。1. A lining structure of a vacuum degassing intermediate tank in which a heat insulating shrinkable board is provided on the inner surface of a steel shell, and an irregular refractory constructed as a jointless lining on the entire lining surface is provided on an operating surface side. .
に不定形耐火物の支持のための耐火物製アンカーブロッ
クを設置した真空脱ガス中間槽のライニング構造。2. The lining structure of a vacuum degassing intermediate tank according to claim 1, wherein an anchor block made of a refractory for supporting the irregular refractory is installed in the irregular refractory.
断熱可縮ボードの熱伝導率が0.3Kcal/m・hr・℃で、か
つ可縮率が20％以上である真空脱ガス中間槽のライニン
グ構造。3. The method according to claim 1, wherein
Lining structure of a vacuum degassing intermediate tank where the heat conductivity of the heat-insulating shrinkable board is 0.3 Kcal / m · hr · ° C and the shrinkage is 20% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29679490A JP2878438B2 (en) | 1990-10-31 | 1990-10-31 | Lining structure of vacuum degassing device intermediate tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29679490A JP2878438B2 (en) | 1990-10-31 | 1990-10-31 | Lining structure of vacuum degassing device intermediate tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04168215A JPH04168215A (en) | 1992-06-16 |
| JP2878438B2 true JP2878438B2 (en) | 1999-04-05 |
Family
ID=17838222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29679490A Expired - Lifetime JP2878438B2 (en) | 1990-10-31 | 1990-10-31 | Lining structure of vacuum degassing device intermediate tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2878438B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012001742A (en) * | 2010-06-14 | 2012-01-05 | Shinagawa Refractories Co Ltd | Circulation tube refractory product for rh furnace |
-
1990
- 1990-10-31 JP JP29679490A patent/JP2878438B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04168215A (en) | 1992-06-16 |
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