JPS632209Y2 - - Google Patents
Info
- Publication number
- JPS632209Y2 JPS632209Y2 JP14834082U JP14834082U JPS632209Y2 JP S632209 Y2 JPS632209 Y2 JP S632209Y2 JP 14834082 U JP14834082 U JP 14834082U JP 14834082 U JP14834082 U JP 14834082U JP S632209 Y2 JPS632209 Y2 JP S632209Y2
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- temperature
- casting
- tundish
- heat generating
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 54
- 239000010959 steel Substances 0.000 claims description 54
- 238000005266 casting Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910018125 Al-Si Inorganic materials 0.000 description 2
- 229910018520 Al—Si Inorganic materials 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000007789 gas Substances 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 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【考案の詳細な説明】
本考案は鋼の連続鋳造において、定温鋳造を可
能ならしめるタンデイツシユに関するものであ
る。ここで、定温鋳造とは、連続鋳造の鋳造区間
全体にわたり温度ばらつきが小さい溶鋼で鋳造す
ることを指す。[Detailed Description of the Invention] The present invention relates to a tundish that enables constant temperature casting in continuous steel casting. Here, constant-temperature casting refers to casting with molten steel with small temperature variations over the entire casting section of continuous casting.
鋼の連続鋳造法は、造塊法に比べ、歩留、省工
程及び省エネルギの点で有利であり、鋳造法の主
流を占めるに至つている。鋼の連続鋳造は、溶鋼
取鍋からの溶鋼をいつたんタンデイツシユに受
け、次いでタンデイツシユから鋳型に連続的に鋳
注され、鋳片の周囲部分が凝固したところで鋳型
から引き出され、さらに冷却されて凝固を完了せ
しめて鋳片を鋳造する方法である。 Continuous steel casting methods have advantages over ingot-forming methods in terms of yield, process savings, and energy savings, and have come to occupy the mainstream of casting methods. Continuous casting of steel involves receiving molten steel from a molten steel ladle into a tundish, then continuously pouring it into a mold from the tundish, and when the surrounding area of the slab has solidified, it is pulled out from the mold and is further cooled and solidified. This method completes the process and casts slabs.
この連続鋳造において、鋳造時の溶鋼温度は、
鋼材の内質とくに自由晶比率を高めるために極力
低い過熱度（溶鋼温度−凝固温度）であることが
望ましく、このための手段としてタンデイツシユ
を利用し、過熱度を一定にコントロールする試み
がなされている。 In this continuous casting, the molten steel temperature during casting is
In order to increase the internal quality of the steel material, especially the free crystal ratio, it is desirable to have as low a degree of superheating (molten steel temperature - solidification temperature) as possible, and attempts have been made to control the degree of superheating to a constant level by using a tundish as a means to achieve this. There is.
ところで、通常タンデイツシユ内の溶鋼温度
は、鋳造初期に取鍋からタンデイツシユを通り鋳
型注入された溶鋼が極小値を示し、注入するにつ
れて徐々に上昇して定常的温度に達し（第区
間）、その後鋳造末期に至るまでの間は温度降下
がゆるやかで、ほぼ定常状態であり（第区間）、
そして鋳造末期で温度降下が著しくなり、低い値
を示す（第区間）というように変化する。 By the way, the temperature of molten steel in the tundish is usually at a minimum value when the molten steel is injected from the ladle through the tundish into the mold at the beginning of casting, and as it is poured, it gradually rises to a steady temperature (section 1), after which the temperature of the molten steel in the tundish is minimal. Until the final stage, the temperature decreases slowly and is in an almost steady state (section 1).
Then, at the end of casting, the temperature decreases significantly and shows a low value (section 1).
これから判るように、低い過熱度の溶鋼を鋳型
に供給しようとする際に問題となるのは、第区
間及び第区間の温度低下である。その理由は、
過熱度は通常第区間の過熱度をもつて操業の目
安とされるが、この区間の過熱度を低くすると上
記の第区間及び第区間での溶鋼温度が凝固点
に接近し、鋳型に溶鋼を注入するための浸漬ノズ
ル内で溶鋼が凝固してノズルの閉塞をきたし操業
トラブルを招くことになるからである。 As can be seen from this, a problem that arises when trying to supply molten steel with a low degree of superheat to the mold is the temperature drop in the first section and the second section. The reason is,
Normally, the degree of superheating in the first section is used as a guideline for operation, but if the degree of superheating in this section is lowered, the temperature of the molten steel in the above-mentioned first and second sections approaches the freezing point, and the molten steel is poured into the mold. This is because the molten steel solidifies in the immersed nozzle used for this process, clogging the nozzle and causing operational troubles.
この低過熱度の場合のノズル閉塞を防止するた
めに、浸漬ノズル内に不活性ガスなどの気体を吹
込む考案や該ノズル周囲に保温装置を設置する考
案（実公昭57−18044）が提案されている。前者
は、ガス流動浮上によるノズル閉塞防止であり、
溶鋼の温度低下の防止は期待できず、後者は、溶
鋼温度の低下によるノズルの閉塞防止という点で
は有効であるが、加熱装置が浸漬ノズル部に設置
してあるため加熱装置の有効長さが限定され、該
ノズルに至る前の溶鋼の温度低下の防止には効が
ない。又、既設設備にこれを採用するためには、
保温熱源として用いる燃料配管などの設備改造を
余儀なくされることから実用上効果が薄いものと
言える。 In order to prevent nozzle clogging in the case of low superheating, the idea of blowing gas such as an inert gas into the submerged nozzle and the idea of installing a heat-retaining device around the nozzle have been proposed (Japanese Utility Model Publication No. 57-18044). ing. The former prevents nozzle clogging by floating gas flow,
The latter cannot be expected to prevent the temperature of molten steel from dropping, and the latter is effective in preventing nozzle blockage due to a drop in molten steel temperature, but since the heating device is installed in the immersed nozzle, the effective length of the heating device is limited. It is not effective in preventing the temperature of molten steel from decreasing before it reaches the nozzle. Also, in order to apply this to existing equipment,
It can be said that it has little practical effect because it requires modification of equipment such as fuel piping used as a heat source.
また、タンデイツシユ内の溶鋼温度を低下させ
ないために、タンデイツシユに電気抵抗または電
気誘導コイルを設けて電気的発熱を行うことが提
案されているが、該発熱装置の冷却のために水を
使用するので安全性に問題がある。 Furthermore, in order to prevent the temperature of the molten steel in the tundish from decreasing, it has been proposed to provide the tundish with an electric resistance or an electric induction coil to generate electrical heat, but since water is used to cool the heating device, There are safety issues.
以上の点をかんがみ研究の結果、本願考案者ら
は溶鋼温度が前記第と期において低下するこ
とを防止し、これにより鋳造の全区間にわたり定
温鋳造を可能し、かつ、安全なタンデイツシユの
構成を得た。 As a result of research in consideration of the above points, the inventors of the present application have developed a structure for a safe tundish that prevents the molten steel temperature from decreasing during the above-mentioned period, thereby enabling constant-temperature casting over the entire casting period. Obtained.
すなわち、そのタンデイツシユは、タンデイツ
シユ内壁に内面壁が耐食性に優れた発熱装置保護
材を配した溶鋼導入孔を有し、該溶鋼導入孔の周
囲で発熱装置保護材の外周に溶鋼の発熱装置を配
置した加熱装置を設けたことを特徴とする定温鋳
造タンデイツシユであり、これを活用することに
より鋼の安定且つ一定温度の溶鋼で鋳造すること
が可能になつた。 That is, the tundish has a molten steel introduction hole on the inner wall of the tundish, the inner wall of which is arranged with a heat generating device protective material having excellent corrosion resistance, and a molten steel heating device is arranged around the molten steel introduction hole and the outer periphery of the heat generating device protective material. This constant-temperature casting tandy is characterized by being equipped with a heating device, and by utilizing this, it has become possible to cast molten steel at a stable and constant temperature.
以下に、本考案装置を図面に従つて説明する。 The device of the present invention will be explained below with reference to the drawings.
第１図は、本考案タンデイツシユの平面図であ
り第２図はその側面断面図。 FIG. 1 is a plan view of the tundish according to the present invention, and FIG. 2 is a side sectional view thereof.
第３図は、溶鋼導入孔部の詳細拡大図である。 FIG. 3 is a detailed enlarged view of the molten steel introduction hole.
各図において、タンデイツシユ本体７の側壁部
に、内面の壁が耐食性に優れた発熱装置保護材２
からなる溶鋼導入孔４を有し、該溶鋼導入孔４の
周囲で前記発熱装置保護材２の外周に発熱装置１
を配した加熱装置ａが設けてある。即ち、該発熱
装置１、筒形の発熱装置保護材２からなる加熱装
置ａを、溶鋼導入孔取付部３に挿入、装着してあ
る。尚、第２図において、４′は溶鋼導入孔４と
タンデイツシユの溶鋼収容室７Ａとを連結する通
路、５は取鍋ノズル、６は取鍋、８は浸漬ノズ
ル、９は鋳型である。 In each figure, a heat generating device protective material 2 with an inner wall having excellent corrosion resistance is attached to the side wall of the tandy dish main body 7.
A heat generating device 1 is provided on the outer periphery of the heat generating device protection material 2 around the molten steel introducing hole 4.
A heating device a is provided. That is, a heating device a consisting of the heat generating device 1 and a cylindrical heat generating device protection member 2 is inserted and attached to the molten steel introduction hole mounting portion 3. In FIG. 2, 4' is a passage connecting the molten steel introduction hole 4 and the molten steel storage chamber 7A of the tundish, 5 is a ladle nozzle, 6 is a ladle, 8 is an immersion nozzle, and 9 is a mold.
本考案はこのように構成してあり、溶鋼は、取
鍋６より取鍋に設けたノズル５より落下し溶鋼導
入孔４から、タンデイツシユ本体７に供給され
る。溶鋼導入孔４の周囲に加熱装置ａを設けてあ
るので、必要があるときは、溶鋼導入孔４を通過
する溶鋼、又は溶鋼導入孔４内にある溶鋼の昇温
を行つて適切な温度に制御することができる。そ
こで溶鋼導入孔４から流出しタンデイツシユ本体
７にある溶鋼を低過熱度の一定温度にでき、これ
を浸漬ノズル８を通して鋳型９に鋳注できる。 The present invention is constructed as described above, and the molten steel falls from the ladle 6 through the nozzle 5 provided in the ladle and is supplied to the tundish body 7 through the molten steel introduction hole 4. Since a heating device a is provided around the molten steel introduction hole 4, when necessary, the temperature of the molten steel passing through the molten steel introduction hole 4 or the molten steel inside the molten steel introduction hole 4 is raised to an appropriate temperature. can be controlled. Therefore, the molten steel flowing out from the molten steel introduction hole 4 and in the tundish body 7 can be brought to a constant temperature with a low degree of superheating, and can be poured into the mold 9 through the immersion nozzle 8.
本考案のタンデイツシユに用いられる発熱装置
保護材２の材質、特に限定されるものではない
が、溶鋼により浸食されず、熱効率及び高温強度
の高いもの、例えば、ジルコニア、アルミナ系耐
火物等、低熱膨張セラミツクスが良い。これによ
つて熱効率の高い加熱が可能で且つ外来系介在物
の発生を抑えることができる。又、発熱装置保護
材２は安全性確保のために複数層とし、該保護材
が浸食あるいは割れた場合に直接発熱装置１に溶
鋼が接触しない構造とすることが望ましい。更
に、発熱装置保護材２の中にセンサを付けること
によつてより安全性の高い操業が可能となる。 The material of the heat-generating device protective material 2 used in the tundish of the present invention is not particularly limited, but is not eroded by molten steel and has high thermal efficiency and high-temperature strength, such as zirconia, alumina-based refractories, etc., with low thermal expansion. Ceramics are good. This enables heating with high thermal efficiency and suppresses the generation of foreign inclusions. Further, it is preferable that the heat generating device protective material 2 has a plurality of layers to ensure safety, and that molten steel does not come into direct contact with the heat generating device 1 even if the protective material erodes or cracks. Furthermore, by attaching a sensor to the heat generating device protection material 2, safer operation becomes possible.
次に、発熱装置１としては、特に限られるもの
ではないが、実施例では内部冷却を施した高周波
誘導加熱装置を用いた。 Next, the heat generating device 1 is not particularly limited, but in the example, a high frequency induction heating device with internal cooling was used.
次に本考案のタンデイツシユを用いた実施例及
び比較例について述べる。 Next, examples and comparative examples using the tundish of the present invention will be described.
実施例
１ 溶鋼量 110ton
（中炭Al−Siキルド鋼）
２ タンデイツシユ
容量 4ton
予熱温度 1100℃
３ 発熱装置 高周波誘導加熱装置
４ 加熱条件
電源 150KW
加熱時期 注入後 10分
鋳造終了前 10分
５ 導入孔
内径 150mm
保護材質 ジルコニア
６ 鋳片サイズ 215×820mm
７ 鋳造速度 0.7ｍ／min
以上の条件により連続鋳造を行つた結果、第４
図に実線で示すように鋳造全般にわたりタンデイ
ツシユ内では溶鋼過熱度10〜15℃の定温鋳造が安
定して行えた。又、安全性の点も問題がなかつ
た。Example 1 Amount of molten steel 110 tons (medium coal Al-Si killed steel) 2 Tundish capacity 4 tons Preheating temperature 1100℃ 3 Heat generating device High frequency induction heating device 4 Heating conditions Power source 150 KW Heating timing 10 minutes after injection 10 minutes before the end of casting 5 Introductory hole Inner diameter 150mm Protective material Zirconia 6 Slab size 215 x 820mm 7 Casting speed 0.7m/min As a result of continuous casting under conditions of 0.7m/min or higher,
As shown by the solid line in the figure, stable constant-temperature casting with a superheating degree of molten steel of 10 to 15°C was performed in the tundish over the entire casting process. Also, there were no problems in terms of safety.
本考案装置は鋳造初期及び末期にのみ短時間使
用することで、十分効果があつた。 The device of the present invention was sufficiently effective when used for a short time only during the initial and final stages of casting.
比較例
１ 溶鋼量 110ton
（中炭Al−Siキルド鋼）
２ タンデイツシユ
容量 4ton
予熱温度 1100℃
３ 発熱装置 なし
４ 鋳片サイズ 215×800mm
５ 鋳造速度 0.7ｍ／min
以上の条件の下で鋳造を行つた結果、第４図に
破線で示すように、鋳造初期及び末期にはタンデ
イツシユ内溶鋼温度の低下をきたしている。ま
た、過熱度も実施例に比べ高くなつている。Comparative example 1 Molten steel volume 110 tons (medium coal Al-Si killed steel) 2 Tandate capacity 4 tons Preheating temperature 1100℃ 3 Heat generating device None 4 Slab size 215 x 800 mm 5 Casting speed 0.7 m/min or more As a result, as shown by the broken line in FIG. 4, the temperature of the molten steel in the tundish decreases at the beginning and end of casting. Furthermore, the degree of superheating is also higher than in the example.
以上実施例及び比較例から明らかなように、本
考案装置を活用することにより、溶鋼過熱度10〜
15℃の巾の定温鋳造が可能となり鋳片の自由晶生
成を促進せしめ優れた内質の鋼を得ることが可能
となつた。 As is clear from the above Examples and Comparative Examples, by utilizing the device of the present invention, the degree of superheating of molten steel is 10 to 10.
It became possible to perform constant-temperature casting in a range of 15°C, which promoted the formation of free crystals in the slab and made it possible to obtain steel with excellent internal quality.
更に鋳造開始時の溶鋼温度低下を制御すること
ができるので、酸素製鋼炉での出鋼温度及び取鍋
その他での二次精錬温度を低温にしても、鋳造に
支障がなく、従つて耐火物溶損に対しても極めて
効果的である。本考案装置は、既設設備に容易に
装着できるという利点もある。 Furthermore, since it is possible to control the drop in molten steel temperature at the start of casting, there is no problem with casting even if the tapping temperature in an oxygen steelmaking furnace and the secondary refining temperature in a ladle or other device are made low. It is also extremely effective against erosion. The device of the present invention also has the advantage that it can be easily installed in existing equipment.
尚、前記の本考案装置では加熱装置ａをタンデ
イツシユ７の側壁部に設けたが、加熱装置の位置
はこれに限るものではなく、適宜の取付手段によ
りタンデイツシユ内の任意の位置に設けることが
できる。 Incidentally, in the above-described apparatus of the present invention, the heating device a is provided on the side wall of the tundish 7, but the position of the heating device is not limited to this, and it can be provided at any position within the tundish by using appropriate mounting means. .
第１図は本考案のタンデイツシユの平面図、第
２図はその側面図、第３図は溶鋼導入孔部の詳細
拡大図、第４図は本考案装置による実施例を比較
例とともに示すグラフ拡大図である。
１……発熱装置、２……発熱装置保護材、３…
…溶鋼導入孔取付部、４……溶鋼導入孔、５……
取鍋ノズル、６……取鍋、７……タンデイツシユ
本体、８……浸漬ノズル、９……鋳型、ａ……加
熱装置。
Fig. 1 is a plan view of the tundish of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a detailed enlarged view of the molten steel introduction hole, and Fig. 4 is an enlarged graph showing an example using the inventive device together with a comparative example. It is a diagram. 1... Heat generating device, 2... Heat generating device protective material, 3...
... Molten steel introduction hole mounting part, 4... Molten steel introduction hole, 5...
Ladle nozzle, 6... Ladle, 7... Tundish body, 8... Immersion nozzle, 9... Mold, a... Heating device.
Claims (1)
る溶鋼導入孔を有し、該溶鋼導入孔の周囲で前記
発熱装置保護材の外周に溶鋼の発熱装置を配置し
た加熱装置を設けたことを特徴とする定温鋳造タ
ンデイツシユ。 It is characterized by having a molten steel introduction hole whose inner wall surface is made of a heat generating device protection material with excellent corrosion resistance, and a heating device having a molten steel heating device arranged around the outer periphery of the heat generating device protection material around the molten steel introduction hole. Constant temperature casting tandate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14834082U JPS5954145U (en) | 1982-09-30 | 1982-09-30 | Constant temperature casting tandate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14834082U JPS5954145U (en) | 1982-09-30 | 1982-09-30 | Constant temperature casting tandate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5954145U JPS5954145U (en) | 1984-04-09 |
| JPS632209Y2 true JPS632209Y2 (en) | 1988-01-20 |
Family
ID=30329605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14834082U Granted JPS5954145U (en) | 1982-09-30 | 1982-09-30 | Constant temperature casting tandate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5954145U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100248A (en) * | 2006-10-18 | 2008-05-01 | Nippon Steel Corp | Continuously casting tundish, and method of continuous casting |
-
1982
- 1982-09-30 JP JP14834082U patent/JPS5954145U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5954145U (en) | 1984-04-09 |
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