JPH0675754B2 - Construction method of weir for tandishyu - Google Patents
Construction method of weir for tandishyuInfo
- Publication number
- JPH0675754B2 JPH0675754B2 JP61123110A JP12311086A JPH0675754B2 JP H0675754 B2 JPH0675754 B2 JP H0675754B2 JP 61123110 A JP61123110 A JP 61123110A JP 12311086 A JP12311086 A JP 12311086A JP H0675754 B2 JPH0675754 B2 JP H0675754B2
- Authority
- JP
- Japan
- Prior art keywords
- tundish
- steel
- mold
- refractory
- inorganic binder
- 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
- 238000010276 construction Methods 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 239000011230 binding agent Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 10
- 239000011819 refractory material Substances 0.000 claims description 7
- 238000009415 formwork Methods 0.000 claims description 6
- 230000001788 irregular Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は不定形耐火物を用いて連続鋳造に使用するタン
ディッシュ内部に設ける堰の施工方法に関する。Description: TECHNICAL FIELD The present invention relates to a method of constructing a weir provided inside a tundish used for continuous casting by using an amorphous refractory material.
（従来技術） 従来より連続鋳造に使用するタンディッシュ１には、第
３図に示すように、内部に耐火物の堰２を設けて、上部
のノズル挿入口３から注入した取鍋の溶鋼が底部に設け
た浸漬ノズル取付口４に直接流入するのを防止したり、
注入した溶鋼の介在物の浮上分離を向上させたりしてい
る。(Prior Art) A tundish 1 conventionally used for continuous casting has a refractory weir 2 provided therein as shown in FIG. To prevent it from directly flowing into the immersion nozzle mounting port 4 provided at the bottom,
It also improves the floating separation of the injected molten steel inclusions.
この堰２の従来の一般的な施工方法は型枠に超微粉バイ
ンダーを配合したアルミナ系のキャスタブル耐火物を水
と混練して流込んで、硬化させた後脱枠乾燥することに
より製造したブロックをタンディッシュ内に取付け、受
鋼前に予熱する方法である。しかしこの方法は水を使用
する湿式法であるため、乾燥に長時間を要し、また乾燥
時や乾燥が十分でない状態で受鋼すると水蒸気爆裂が生
じる恐れがあり、さらに水と混練しなければならないた
め、配合材料の材質も限定されるという問題があった。The conventional general construction method of the weir 2 is a block produced by kneading an alumina castable refractory containing a superfine powder binder in a mold, pouring it into water, curing it, and then deframed it for drying. Is a method of preheating before receiving steel by mounting in a tundish. However, since this method is a wet method using water, it takes a long time to dry, and steam blast may occur if steel is received during or when the drying is not sufficient. Therefore, there is a problem that the material of the compounding material is limited.
そこでこのような問題の生じない堰の施工方法として、
水を使用しない乾式法が提案されている。この方法は骨
材耐火物に粉状熱硬化性樹脂と無機結合剤を配合した不
定形耐火物を用いて、この耐火物を振動を付与して型枠
の中に充填し、加熱硬化後脱枠することにより予めブロ
ックを製造し、このブロックをタンディッシュ内に施工
する方法（特開昭61−33742号公報）であるが、この方
法の場合ブロック製造の加熱硬化時にバインダー樹脂の
分解による発煙、悪臭などの発生や受鋼時に炭素のピッ
クアップの懸念があり、またブロックを予め製造して施
工する方法であるため、施工までに時間を要するという
問題があった。Therefore, as a method of constructing a weir that does not cause such problems,
A dry method that does not use water has been proposed. This method uses an irregular shaped refractory that is a mixture of a powdered thermosetting resin and an inorganic binder in an aggregate refractory. A method of manufacturing a block in advance by forming a frame and then constructing this block in a tundish (Japanese Patent Laid-Open No. 61-33742) is a method in which smoke is generated due to decomposition of the binder resin during heat curing during block manufacturing. However, there is a concern that an offensive odor may be generated or carbon may be picked up when steel is received, and since the block is manufactured and constructed in advance, it takes time to construct.
（発明が解決しようとする問題点） 本発明はタンディッシュ用堰の従来の乾式施工方法にお
ける上記問題を解決した施工方法を提供するものであ
る。(Problems to be Solved by the Invention) The present invention provides a construction method that solves the above problems in the conventional dry construction method of a tundish weir.
（問題点を解決するための手段） 本発明者らはバインダーとして樹脂を使用せずに短時間
に施工できるタンディッシュ用堰の乾式施工方法を開発
すべく種々検討した結果、バインダーとして無機バイン
ダーを使用すれば、樹脂を用いた場合の問題は解決で
き、また型枠として鋼製のものを使用して、該型枠をタ
ンディッシュ内に直接設置した後、不定形耐火物を投入
して、耐火物を締付けるか、あるいはタンディッシュ外
に型枠を設置して、不定形耐火物を同様に投入、締付け
した後、タンディッシュ内に型枠ごと移設して、予熱硬
化させ、しかる後に受鋼時の溶鋼熱により型枠の溶解と
焼き固めとを行えば、施工時間を短縮できることを案出
したのである。(Means for Solving Problems) As a result of various studies to develop a dry construction method for a tundish weir that can be constructed in a short time without using a resin as a binder, the present inventors have selected an inorganic binder as a binder. If used, the problem when using a resin can be solved, and using a steel frame as a mold, after directly installing the mold in the tundish, throw in an amorphous refractory, Tighten the refractory or install a form outside the tundish, put in an irregular shaped refractory in the same way, tighten it, then move the form together in the tundish, preheat-harden, and then receive steel. It was devised that the construction time could be shortened by melting the mold and baking it by the heat of molten steel at that time.
本発明はかかる案出に基づいてなされたもので、タンデ
ィッシュ内の所定位置に所定形状の鋼製型枠を設置し
て、該型枠内に骨材と、無機バインダーと、焼結用金属
粉末とを混合した不定形耐火物を投入した後、まず振動
または衝撃を加えて締付け、次にタンディッシュ予熱の
際、無機バインダーの溶融温度以上に予熱して硬化さ
せ、しかる後に受鋼時の溶鋼熱により焼結用金属粉末で
焼き固めるとともに型枠を溶解するか、あるいはタンデ
ィッシュ外に所定形状の鋼製型枠を設置して、該型枠内
に耐火物骨材と、無機バインダーと、焼結用金属粉末と
を混合した不定形耐火物を投入した後、まず振動または
衝撃を加えて締付けた後、型枠ごとにタンディッシュ内
に移設して、次にタンディッシュ予熱の際、無機バイン
ダーの溶融温度以上に予熱して硬化させ、しかる後に受
鋼時の溶鋼熱により焼結用金属粉末で焼き固めるととも
に型枠を溶解することを特徴としている。The present invention has been made based on the above idea, in which a steel mold having a predetermined shape is installed at a predetermined position in a tundish, and an aggregate, an inorganic binder, and a sintering metal are placed in the mold. After adding an amorphous refractory mixed with powder, first apply vibration or impact to tighten it, then when preheating the tundish, preheat it to a temperature above the melting temperature of the inorganic binder to harden it, and then It is baked and solidified with the metal powder for sintering by the heat of molten steel and the mold is melted, or a steel mold of a predetermined shape is installed outside the tundish, and the refractory aggregate and the inorganic binder are placed in the mold. , After adding an amorphous refractory mixed with sintering metal powder, first apply vibration or impact to tighten it, then move it into the tundish for each form, and then when preheating the tundish, Above the melting temperature of the inorganic binder Heat cured, it is characterized by dissolving the mold with solidified tempered with a metal powder for sintering by molten steel heat during 受鋼 thereafter.
以下本発明を詳細に説明する。The present invention will be described in detail below.
本発明の施工方法は、第１図に示すように、タンディッ
シュ１の内部に鋼製型枠５、5aを端部がタンディッシュ
内面と密着するように設置して、型枠空間６を形成し、
その空間内に、第２図に示すように、耐火物骨材と、無
機バインダーと、焼結用金属粉末とを混合した不定形耐
火物７を投入する。According to the construction method of the present invention, as shown in FIG. 1, steel molds 5 and 5a are installed inside the tundish 1 so that the ends are in close contact with the inner surface of the tundish to form a mold space 6. Then
As shown in FIG. 2, an amorphous refractory 7 in which a refractory aggregate, an inorganic binder, and a metal powder for sintering are mixed is put into the space.
ここで投入する不定形耐火物の構成物質の好ましいもの
を挙げれば、耐火物骨材としては、ドロマイトクリンカ
ー、マグネサイト、マグネシアクリンカー、カルシアク
リンカーなどＳ、SiO2、Al2O3などの介在物吸収性が優
れた塩基性のものである。これらのものは１種だけでな
く、２種以上混合使用してもよい。しかしいずれのもの
の場合も投入後振動や衝撃により容易に充填されるよう
に粒度を調整したものを使用する。また耐火物骨材は中
性または酸性のものを使用することもできる。Preferred examples of the constituent material of the amorphous refractory to be added here include refractory aggregates such as dolomite clinker, magnesite, magnesia clinker, calcia clinker, and other inclusions such as S, SiO 2 , and Al 2 O 3 . It is a basic substance with excellent absorbability. These may be used alone or in combination of two or more. However, in the case of any of them, the one whose particle size is adjusted so that it can be easily filled by vibration or impact after being charged is used. The refractory aggregate can also be neutral or acidic.
また無機バインダーとしては、珪酸塩、燐酸塩、ホウ
酸、ホウ砂、フリットなどが挙げられる。これらの無機
バインダーは必要に応じて２種以上添加してよいが、そ
の添加量は耐火物骨材100重量部当り５〜10重量部にす
るのが好ましい。これは５重量部未満であると、効果が
不十分で、10重量部を越えると充填性、耐食性などが低
下するからである。Examples of the inorganic binder include silicate, phosphate, boric acid, borax, frit and the like. Two or more kinds of these inorganic binders may be added, if desired, but the addition amount is preferably 5 to 10 parts by weight per 100 parts by weight of the refractory aggregate. This is because if it is less than 5 parts by weight, the effect is insufficient, and if it exceeds 10 parts by weight, the filling property and the corrosion resistance are deteriorated.
有機バインダー、とくにフェノール樹脂は低温強度を発
現させるのに効果的なバインダーであるが、本発明の場
合タンディッシュ内に直接施工または型枠のまま移設す
るので、低温強度は重要でなく、溶鋼の清浄度を低下さ
せるような有機バインダーの添加は必要としない。Organic binders, especially phenolic resins, are effective binders for developing low-temperature strength, but in the case of the present invention, low-temperature strength is not important because they are either directly constructed in the tundish or transferred in the formwork. It is not necessary to add an organic binder that reduces the cleanliness.
さらに焼結用金属粉末しては、AlやSiのごとく高温で架
橋効果を発揮するものが挙げられる。この金属粉末の添
加量は耐火物骨材100重量部当り２重量部未満である
と、架橋効果が不十分で、５重量部を越えると、無添加
の場合より逆に強度を低下させ、充填性にも悪影響を与
えるので、２〜５重量部にするのが好ましい。Furthermore, examples of the metal powder for sintering include those that exhibit a crosslinking effect at high temperatures, such as Al and Si. If the addition amount of this metal powder is less than 2 parts by weight per 100 parts by weight of the refractory aggregate, the crosslinking effect is insufficient, and if it exceeds 5 parts by weight, the strength is decreased to the contrary, and the filling is performed. Since it also adversely affects the sex, it is preferable to use 2 to 5 parts by weight.
なお高温での耐スポーリング性や耐摩耗性を向上させる
のに金属粉末とともに金属ファイバー、とくにステンレ
ス鋼ファイバーを添加するのも有効である。To improve spalling resistance and wear resistance at high temperatures, it is also effective to add metal fibers, especially stainless steel fibers, together with the metal powder.
不定形耐火物の投入後は振動または衝撃を加え、耐火物
を締め固める。振動を加えるには例えば棒状バイブレー
ターで耐火物を直接振動させ、また衝撃を加えるにはエ
アーランマーで耐火物を突き固める方法によればよい。After throwing in an irregular shaped refractory, apply vibration or shock to compact the refractory. The vibration can be applied by directly vibrating the refractory material with a rod-shaped vibrator, and the impact can be applied by tamping the refractory material with an air rammer.
耐火物を締め固めたなら、予熱してバインダーを溶融さ
せることにより硬化させ、一体のブロックにする。この
予熱は通常タンディッシュの予熱時の熱（約1000℃）に
より行う。その後型枠はそのままにして、連続鋳造に使
用し、受鋼時の溶鋼熱により焼結用の金属粉末を溶融さ
せ、焼き固める。この焼き固めによりブロックは徐々に
焼結が進行し、機械的摩耗や衝撃に対して十分なる抵抗
を有するようになるとともに、型枠は溶解されて、溶鋼
となる。Once the refractory is compacted, it is preheated to melt the binder and harden it into an integral block. This preheating is usually performed by the heat (about 1000 ° C) during the preheating of the tundish. After that, the mold is left as it is, and it is used for continuous casting, and the metal powder for sintering is melted by the heat of molten steel at the time of receiving the steel, and baked and solidified. Due to this baking and hardening, the blocks gradually sinter to have sufficient resistance to mechanical wear and impact, and the mold is melted to become molten steel.
なおタンディッシュの基数が少なく、操業上回転繰りな
どに問題がある場合には、タンディッシュ外に鋼製型枠
を設置して、該型枠内への不定形耐火物の投入、振動ま
たは衝撃による耐火物の締付けまでをタンディッシュ外
で行い、その後型枠ごとタンディッシュ内に移設して、
くさび煉瓦などで固定し、予熱による硬化、溶鋼熱によ
る焼結を行うようにしてもよい。If the number of bases of tundish is small and there is a problem in rotation during operation, install a steel mold outside the tundish and put in an irregular shaped refractory, vibration or impact. Tightening the refractory with the outside of the tundish, and then moving the formwork inside the tundish,
It may be fixed with wedge bricks or the like, and may be hardened by preheating or sintered by molten steel heat.
次に実施例により本発明を説明する。Next, the present invention will be described with reference to examples.
（実施例） 実施例１ 第１表に示すような組成の不定形耐火物を所定形状の型
枠に投入して、棒状バイブレーターで振動を加えて締め
固めた後、1000℃に加熱して硬化、焼結し、ブロックに
した。その後脱枠して、ブロックより40×40×160mmの
試片を切出し、物性試験を行った。第１表にこの物性試
験結果を示す。(Example) Example 1 An amorphous refractory material having a composition as shown in Table 1 was put into a mold having a predetermined shape, vibrated with a rod-shaped vibrator to be compacted, and then heated to 1000 ° C to cure. , Sintered and made into blocks. After that, the frame was removed, and a test piece of 40 × 40 × 160 mm was cut out from the block to perform a physical property test. Table 1 shows the results of this physical property test.
第１表より本発明の施工方法によるブロックは耐火物と
しての物性が熱硬化性樹脂バインダーを使用した従来法
によるブロックより優れていることがわかる。It can be seen from Table 1 that the block made by the construction method of the present invention has better physical properties as a refractory material than the block made by the conventional method using a thermosetting resin binder.
実施例２ タンディッシュ内に型枠を間隔が10cmとなるように設置
して、実施例１の第１表におけるNo1の組成の不定形耐
火物を投入し、棒状バイブレーターで締め固めた後、タ
ンディッシュ予熱の熱を利用して硬化させ、その後溶鋼
を注入して、溶鋼熱により焼結した。 Example 2 A mold was installed in a tundish with a space of 10 cm, an amorphous refractory material having a composition No. 1 in Table 1 of Example 1 was charged, and the mixture was compacted with a rod-shaped vibrator, The dish was preheated to be hardened, and then molten steel was injected and sintered by the molten steel heat.
第２表にこのように施工した場合と施工方法が従来のア
ルミナ系キャスタブル耐火物を使用する湿式法により予
めブロックを製造して、タンディッシュ内に施工する方
法および前記実施例１の比較例における不定形耐火物を
使用する乾式法によりブロックを予め製造し、タンディ
ッシュ内に施工する方法である場合の各施工時間および
鋼中介在物量を示す。Table 2 shows a case where the block is manufactured in this way and a method of constructing the block in advance in a tundish by a wet method using a conventional alumina castable refractory, and a comparative example of Example 1 described above. The respective construction times and the amount of inclusions in the steel in the case where the block is preliminarily manufactured by a dry method using an amorphous refractory and then constructed in a tundish are shown.
なお従来の湿式法および乾式法による施工は次のような
工程で行った。The conventional wet method and dry method were carried out in the following steps.
（イ）湿式法 キャスタブル耐火物と水との混練→型枠に耐火物投入→
養生→脱枠→乾燥→冷却→タンディッシュ内へのブロッ
ク設置→予熱→受鋼 （ロ）乾式法 型枠に不定形耐火物投入→振動による耐火物の締め固め
→加熱硬化→冷却→脱枠→タンディッシュ内へのブロッ
ク設置→予熱→受鋼 第２表より本発明によれば施工時間を著しく短縮するこ
とができ、鋼中介在物量も従来法と変わらない。(B) Wet method Kneading of castable refractory and water → Add refractory to mold →
Curing → Deframed → Drying → Cooling → Block installation in tundish → Preheating → Steel receiving (b) Dry method Injecting irregular shaped refractory into mold → Compaction of refractory by vibration → Heat hardening → Cooling → Deframed → Block installation in tundish → Preheating → Steel receiving From Table 2, according to the present invention, the construction time can be remarkably shortened and the amount of inclusions in the steel is the same as in the conventional method.
（発明の効果） 以上のごとく、本発明の施工方法はバインダーとして熱
硬化性樹脂を使用しないので、発煙や悪臭などの発生や
炭素のピックアップの懸念がなく、またブロック製造を
経由することなく直接タンディッシュ内に施工し、脱枠
も不要であるので、施工時間が短い。さらに、堰が無機
バインダーで硬化させてあるので、受鋼時の強度が大き
く、しかも、最初の受鋼時は型枠で保護されているの
で、耐衝撃に優れている。また、受鋼後は金属粉末で焼
き固められているので、耐摩耗、耐衝撃が受鋼前の無機
バインダーで硬化させたものより一層大きくなる。(Effects of the Invention) As described above, since the construction method of the present invention does not use a thermosetting resin as a binder, there is no concern about the generation of smoke or bad odors or the pickup of carbon, and also without directly passing through block manufacturing. Construction time is short because it is installed in the tundish and there is no need to remove the frame. Furthermore, since the weir is hardened with an inorganic binder, it has a high strength when receiving steel, and since it is protected by a mold during the first steel receiving, it has excellent impact resistance. Further, since the steel is hardened with the metal powder after the steel is received, the wear resistance and the impact resistance are further increased as compared with those hardened with the inorganic binder before the steel is received.
第１図、第２図は本発明による施工方法を示すもので、
第１図はタンディッシュ内に鋼製型枠を設置した状態を
示す破断部分斜視図、第２図は第１図の型枠内に不定形
耐火物を投入した状態を示す破断部分斜視図である。 第３図はタンディッシュの断面図である。 １……タンディッシュ、２……堰、３……ノズル挿入
口、４……浸漬ノズル取付口、５、5a……鋼製型枠、６
……型枠空間、７……不定形耐火物、1 and 2 show a construction method according to the present invention,
FIG. 1 is a fragmentary perspective view showing a state in which a steel mold is installed in a tundish, and FIG. 2 is a fragmentary perspective view showing a condition in which an unshaped refractory is put into the mold in FIG. is there. FIG. 3 is a sectional view of the tundish. 1 ... Tundish, 2 ... Weir, 3 ... Nozzle insertion port, 4 ... Immersion nozzle mounting port, 5, 5a ... Steel form, 6
…… Formwork space, 7 …… Unshaped refractory,
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村岡 久義 福岡県北九州市戸畑区牧山新町１の１ 大 光炉材株式会社内 (72)発明者 亀田 信作 福岡県北九州市戸畑区牧山新町１の１ 大 光炉材株式会社内 (56)参考文献 特開 昭61−33742（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisayoshi Muraoka 1-1 Makiyama Shinmachi, Tobata-ku, Kitakyushu, Fukuoka Prefecture Inside Daiko Furnace Co., Ltd. (72) Inventor Shinsaku Kameda 1 Makiyama-shinmachi, Tobata-ku, Kitakyushu, Fukuoka 1 Daiko Furnace Co., Ltd. (56) Reference JP-A-61-33742 (JP, A)
Claims (2)
鋼製型枠を設置して、該型枠内に耐火物骨材と、無機バ
インダーと、焼結用金属粉末とを混合した不定形耐火物
を投入した後、まず振動または衝撃を加えて締付け、次
にタンディッシュ予熱の際、無機バインダーの溶融温度
以上に予熱して硬化させ、しかる後に受鋼時の溶鋼熱に
より焼結用金属粉末で焼き固めるとともに型枠を溶解す
ることを特徴とするタンディッシュ用堰の施工方法。1. An irregular shape in which a steel mold having a predetermined shape is installed at a predetermined position in a tundish, and a refractory aggregate, an inorganic binder, and a metal powder for sintering are mixed in the mold. After adding refractory material, first apply vibration or impact to tighten it, then preheat to above the melting temperature of the inorganic binder to harden it when preheating the tundish, and then sinter metal by heat of molten steel when receiving steel. A method of constructing a weir for a tundish, which comprises melting the formwork with baking with powder.
設置して、該型枠内に耐火物骨材と、無機バインダー
と、焼結用金属粉末とを混合した不定形耐火物を投入し
た後、まず振動または衝撃を加えて締付けた後、型枠ご
とにタンディッシュ内に移設して、次にタンディッシュ
予熱の際、無機バインダーの溶融温度以上に予熱して硬
化させ、しかる後に受鋼時の溶鋼熱により焼結用金属粉
末で焼き固めるとともに型枠を溶解することを特徴とす
るタンディッシュ用堰の施工方法。2. A steel formwork having a predetermined shape is installed outside the tundish, and an amorphous refractory product is prepared by mixing a refractory aggregate, an inorganic binder, and a metal powder for sintering in the formwork. After charging, first apply vibration or shock to tighten, then move each mold into the tundish, then at the time of preheating the tundish, preheat to a temperature above the melting temperature of the inorganic binder to cure it, and after that A method for constructing a tundish weir, characterized in that the mold is melted by being hardened with a metal powder for sintering by molten steel heat at the time of receiving steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123110A JPH0675754B2 (en) | 1986-05-28 | 1986-05-28 | Construction method of weir for tandishyu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123110A JPH0675754B2 (en) | 1986-05-28 | 1986-05-28 | Construction method of weir for tandishyu |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62279058A JPS62279058A (en) | 1987-12-03 |
| JPH0675754B2 true JPH0675754B2 (en) | 1994-09-28 |
Family
ID=14852421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61123110A Expired - Lifetime JPH0675754B2 (en) | 1986-05-28 | 1986-05-28 | Construction method of weir for tandishyu |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675754B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133742A (en) * | 1984-07-25 | 1986-02-17 | Kobe Steel Ltd | Production of tundish gate |
-
1986
- 1986-05-28 JP JP61123110A patent/JPH0675754B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62279058A (en) | 1987-12-03 |
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