JPH01262053A - Method for preventing over-cooling of molten steel in tundish for continuous casting and structure of tundish - Google Patents
Method for preventing over-cooling of molten steel in tundish for continuous casting and structure of tundishInfo
- Publication number
- JPH01262053A JPH01262053A JP9032188A JP9032188A JPH01262053A JP H01262053 A JPH01262053 A JP H01262053A JP 9032188 A JP9032188 A JP 9032188A JP 9032188 A JP9032188 A JP 9032188A JP H01262053 A JPH01262053 A JP H01262053A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- casting
- tundish
- chamber
- heating chamber
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009749 continuous casting Methods 0.000 title claims description 5
- 238000001816 cooling Methods 0.000 title abstract 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 238000005266 casting Methods 0.000 claims abstract description 48
- 238000005192 partition Methods 0.000 claims abstract description 33
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 3
- 238000004781 supercooling Methods 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 235000021167 banquet Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は連続鋳造の鋳造初期にタンデッシュ内溶鋼の過
冷却を防止するための方法及びその実施に好適な装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing overcooling of molten steel in a tundish during the initial stage of continuous casting, and a device suitable for carrying out the method.
連続鋳造の鋳造初期では、取鍋から注出する溶鋼の温度
が低く、加えてタンデッシュ内の耐火物への抜熱が大き
いため溶鋼温度が低下し、最悪の場合には、鋳型への注
入ノズルが閉塞するという問題を生じる。最近のタンデ
ッシュは、溶鋼の温度を一定にコントロールするため誘
導加熱ヒータを付設したものが比較的多いが、通常のヒ
ータでは、上記鋳造初期の溶鋼温度の低下に十分対応で
きす、溶鋼を適切な温度に高めるには大容量のヒータを
取付ける必要があり、経済性に問題がある。In the early stages of continuous casting, the temperature of the molten steel poured out from the ladle is low, and in addition, a large amount of heat is lost to the refractories in the tundish, which causes the molten steel temperature to drop, and in the worst case, the injection nozzle into the mold This causes the problem of blockage. Relatively many modern tundishes are equipped with induction heaters to control the temperature of molten steel at a constant level, but normal heaters cannot adequately cope with the drop in molten steel temperature at the initial stage of casting, and do not allow the molten steel to be heated properly. In order to raise the temperature, it is necessary to install a large-capacity heater, which poses an economical problem.
本発明はこのような従来の問題に鑑みなされたもので、
鋳造初期における溶鋼の過冷却を適切に防止し得る方法
及びその実施に好適な装置の提供をその目的とする。The present invention was made in view of such conventional problems,
The object of the present invention is to provide a method that can appropriately prevent overcooling of molten steel in the initial stage of casting, and a device suitable for carrying out the method.
このため本発明は、鋳造初期においては、溶鋼をタンデ
ッシュ内の一部の区画に保持して、ヒータによりその熱
補償に行い、その後溶鋼をタンデッシュの他の区画に流
入させ鋳込を行うようにするもので、上記溶鋼の保持を
注入溶鋼で溶解する仕切板により行い、その溶解により
保持された？８鋼を他の区画に流入させるようにしたも
のである。Therefore, in the present invention, in the early stage of casting, molten steel is held in a part of the tundish and its heat is compensated for by a heater, and then the molten steel is allowed to flow into other parts of the tundish for casting. The molten steel is held by a partition plate that is melted by the injected molten steel, and the molten steel is held by the melting. 8 steel flows into other compartments.
すなわち本発明は、融点が注入される溶鋼の温度より低
く且つ溶鋼と接触して所定時間経過後に溶解するような
厚みを有する仕切板を少なくともその一部に有する堰に
よって、タンデッシュ内に、ヒータに通じる加熱室とタ
ンデッシュノズルに通じる鋳込室とを形成しておき、鋳
造初期において溶鋼を加熱室内に保持してヒータにより
加熱し、その後、前記仕切板の溶解により溶鋼を鋳込室
に流入させるようにしたことをその特徴とする。That is, the present invention provides a weir that has a partition plate in at least a part of which has a melting point lower than the temperature of the molten steel to be injected and has a thickness such that it melts after a predetermined period of time after coming into contact with the molten steel. A heating chamber that communicates with the tundish nozzle and a casting chamber that communicate with the tundish nozzle are formed, and in the early stage of casting, molten steel is held in the heating chamber and heated by a heater, and then the molten steel flows into the casting chamber by melting the partition plate. Its feature is that it is made to do.
また、本願節２の発明はこのような方法の実施に好適な
タンデッシュ構造に関するもので、その特徴とするとこ
ろは、タンデッシュ内が、堰により、注入室と、ヒータ
に通じる加熱室と、タンデッシュノズルに通じる鋳込室
とに仕切られ、注入室と加熱室とを仕切る堰に複数の溶
鋼通過孔が形成されるとともに、加熱室と鋳込室とを仕
切る堰の湯面下に位置すべき部分に窓孔が形成され、該
窓孔に前記仕切板を脱着可能に嵌めこみ得るようにした
ことにある。In addition, the invention of Section 2 of the present application relates to a tundish structure suitable for carrying out such a method, and its feature is that the interior of the tundish is separated by a weir into an injection chamber, a heating chamber communicating with a heater, and a heating chamber connected to the heater. It should be divided into a casting chamber leading to the nozzle, and a plurality of molten steel passage holes should be formed in the weir that partitions the pouring chamber and the heating chamber, and should be located below the surface of the molten metal in the weir that partitions the heating chamber and the casting chamber. A window hole is formed in the portion, and the partition plate can be removably fitted into the window hole.
本発明法によれば、溶鋼注入に先立ち、溶鋼に溶解する
仕切板を有する堰によってタンデッシュ内に加熱室と鋳
込室とが形成される。加熱室はヒータ取付部位と通じて
おり、また鋳込室はタンデッシュノズルと通じている。According to the method of the present invention, prior to the injection of molten steel, a heating chamber and a casting chamber are formed in the tundish by a weir having a partition plate that melts into the molten steel. The heating chamber communicates with the heater mounting area, and the casting chamber communicates with the tundesh nozzle.
鋳造初期において、取鍋の溶鋼は（注入室がある場合は
注入室を通じて）加熱室内に流入し、堰の仕切板が溶解
するまでの間、加熱室内に保持され、ここでヒータによ
り加熱される。堰の仕切板は、溶鋼の加熱に要する時間
等に応じてその厚が選択されており、溶鋼が十分加熱さ
れるのと相前後して溶鋼の熱で溶解し、堰に開口を形成
させる。これにより、溶鋼は鋳込室に流入し鋳込が行わ
れる。During the initial stage of casting, the molten steel in the ladle flows into the heating chamber (through the pouring chamber, if there is one) and is held in the heating chamber until the partition plate of the weir is melted, where it is heated by a heater. . The thickness of the partition plate of the weir is selected depending on the time required to heat the molten steel, etc., and when the molten steel is sufficiently heated, it is melted by the heat of the molten steel and an opening is formed in the weir. As a result, molten steel flows into the casting chamber and is poured.
また、本発明の装置によれば、取鍋の溶鋼は、まず注入
室に注入された後、堰に形成された複数の溶鋼通過孔を
通じて加熱室内に流入する。Further, according to the apparatus of the present invention, molten steel in the ladle is first injected into the injection chamber, and then flows into the heating chamber through the plurality of molten steel passage holes formed in the weir.
このような溶鋼注入において、堰は整流板として作用し
、加熱室内での湯面の乱れを抑制する。In such injection of molten steel, the weir acts as a current plate and suppresses turbulence of the molten metal level in the heating chamber.
加熱室内で所定時間保持され加熱された溶鋼は、加熱室
と鋳込室間の堰の窓孔に嵌め込まれた仕切板の溶解によ
り窓孔を通じて鋳込室に流人し、ノズルから鋳型に注入
される。前記堰の窓孔は湯面下に位置しているため、こ
の堰も整流板として機能し、鋳込室における湯面の乱れ
を抑制する。また、加熱室には溶鋼保温のためパウダが
入れられるが、溶鋼は湯面下の窓孔を通じて鋳込室内に
流入するため、パウダの鋳込室への流入が防止され、ノ
ズルへのパウダ巻込みも適切に抑えられる。Molten steel is held and heated in the heating chamber for a predetermined period of time, then flows into the casting chamber through the window hole by melting the partition plate fitted into the window hole of the weir between the heating chamber and the casting chamber, and is injected into the mold through the nozzle. be done. Since the window hole of the weir is located below the molten metal surface, this weir also functions as a rectifying plate and suppresses turbulence of the molten metal surface in the casting chamber. In addition, powder is put into the heating chamber to keep the molten steel warm, but since the molten steel flows into the casting chamber through the window hole below the molten metal surface, powder is prevented from flowing into the casting chamber, and the powder is not wound around the nozzle. Crowding can also be appropriately suppressed.
第１図及び第２図は本発明の装置及びこれによる実施状
況を示すものである。FIGS. 1 and 2 show the apparatus of the present invention and its implementation status.
タンデッシュＡの本体部内には１対の堰４ａ、４ｂが設
けられ、この堰によって、中央部に加熱室１が、またそ
の両側に鋳込室２ａ、２ｂが形成されている。A pair of weirs 4a and 4b are provided in the main body of the tundish A, and these weirs form a heating chamber 1 in the center and casting chambers 2a and 2b on both sides thereof.
前記加熱室１の一方の側部には、筒状（ルツボ型）の誘
導加熱ヒータ７が接続され、該ヒータの内部空間は加熱
室に連通している。また、前記鋳込室２ａ、２ｂはタン
デッシュノズル８に通じている。A cylindrical (crucible-shaped) induction heater 7 is connected to one side of the heating chamber 1, and an internal space of the heater communicates with the heating chamber. Furthermore, the casting chambers 2a and 2b communicate with a tundish nozzle 8.
加熱室１の他方の側部には、堰６を介して注入室３が形
成されている。この堰６には複数の溶鋼通過孔６１が形
成されている。An injection chamber 3 is formed on the other side of the heating chamber 1 with a weir 6 interposed therebetween. A plurality of molten steel passage holes 61 are formed in this weir 6.
前記堰４ａ、４ｂの湯面下に位置すべき部位には、窓孔
４１が形成され、この窓孔４１に溶鋼中に溶解すべき仕
切板を脱着可能に嵌め込み得るようになっている。A window hole 41 is formed in a portion of the weirs 4a, 4b that should be located below the hot water level, and a partition plate to be melted into the molten steel can be removably fitted into the window hole 41.
本発明では、溶銅注入に先立ち、前記窓孔４１に仕切板
５が嵌め込まれ、溶鋼は鋳造初期においてこの仕切板５
が溶解するまでの間、加熱室１内に保持される。このた
め上記仕切板は、注入された溶鋼の温度よりも低い融点
のものが用いられ、また、溶鋼を加熱室内しこ保持すべ
き時間に応じてその厚さが選択される。普通用いられて
いるタンデッシュの容量及びヒータの加熱能力等を考慮
した場合、加熱室内での加熱保持時間は少なくとも３０
秒程度必要であると考えられ、これ以下であると溶鋼温
度を十分高めることができない。一方、溶鋼温度との関
係では加熱保持時間に特に上限はないが、３００秒を超
えると取鍋側の注入ノズルが閉塞するという別の問題が
生ずるおそれがある。このようなことから通常は、加熱
保持時間は３０秒〜３００秒程度の範囲とすることが好
ましく、したがって、仕切板もこの程度の時間で溶解す
るような厚さのものが用いられる。また仕切板の材質は
、鋳造すべき鋼等の材質等に応じて選択されるが、通常
は例えば軟鋼板等が用いられる。例えば鋳造の対象が０
．１％Ｃ鋼の場合には、０．３％Ｃ鋼（０，１％Ｃ鋼よ
り融点が１５℃程度低い。）の仕切板が用いられる。In the present invention, the partition plate 5 is fitted into the window hole 41 prior to the injection of molten copper, and the molten steel is poured into the partition plate 5 in the initial stage of casting.
is maintained in the heating chamber 1 until it is melted. For this reason, the partition plate used has a melting point lower than the temperature of the injected molten steel, and its thickness is selected depending on the time for which the molten steel is to be kept tightly in the heating chamber. Considering the capacity of the commonly used tundish and the heating capacity of the heater, the heating retention time in the heating chamber is at least 30 minutes.
It is thought that about seconds are required, and if it is less than this, the molten steel temperature cannot be raised sufficiently. On the other hand, there is no particular upper limit to the heating holding time in relation to the molten steel temperature, but if it exceeds 300 seconds, another problem may occur in that the injection nozzle on the ladle side becomes clogged. For this reason, it is usually preferable that the heating holding time is in the range of about 30 seconds to 300 seconds, and therefore, the partition plate is also used with a thickness that will melt in about this amount of time. Further, the material of the partition plate is selected depending on the material such as steel to be cast, and usually, for example, a mild steel plate is used. For example, the casting target is 0
．． In the case of 1% C steel, a partition plate of 0.3% C steel (which has a melting point about 15° C. lower than that of 0.1% C steel) is used.
なお、堰４ａ、４ｂにおける窓孔４１及びこれに嵌め込
まれる仕切板５の形状等は適宜なものとすることができ
、例えば、第３図に示すように、複数設けることもでき
る。但し、堰４ａ、４ｂに整流板としての機能を持たせ
、且つ加熱室１内に入れられる保温用パウダの鋳込室２
ａ、２ｂの流入を防ぐためには、窓孔４１を加熱室内に
おける湯面レベル（定常操業における湯面レベル）より
も下の部位に形成することが必要である。Note that the shapes of the window holes 41 in the weirs 4a, 4b and the partition plates 5 fitted therein can be made as appropriate, and for example, as shown in FIG. 3, a plurality of window holes 41 can be provided. However, the weirs 4a and 4b are provided with a function as a rectifying plate, and a casting chamber 2 for heat-insulating powder placed in the heating chamber 1 is provided.
In order to prevent the inflow of water a and 2b, it is necessary to form the window hole 41 at a location below the hot water level in the heating chamber (the hot water level in steady operation).
次に、第１図及び第２図に示すタンデッシュを用いて行
われる本発明法について説明する。Next, the method of the present invention performed using the tundish shown in FIGS. 1 and 2 will be described.
鋳込開始に先立ち、堰４ａ、４ｂの窓孔４１に仕切板５
を必要に応じて適当な固定手段を用いて嵌め込み固定し
、これにより、実質的に加熱室１及び鋳込室２ａ、２ｂ
を形成させる。この状態で取鍋（図示せず）から注入室
３内に溶鋼を注入する。Prior to the start of casting, partition plates 5 are installed in the window holes 41 of the weirs 4a and 4b.
are fitted and fixed using appropriate fixing means as necessary, and thereby the heating chamber 1 and the casting chambers 2a, 2b are substantially closed.
to form. In this state, molten steel is poured into the injection chamber 3 from a ladle (not shown).
注入された溶鋼は堰６の溶鋼通過孔６１を通って整流さ
れつつ加熱室１内に流入する。加熱室１内は、溶鋼の耐
火物への抜熱をなるべく少なくするため、予めバーナ等
により１０００℃程度に予熱されている。The injected molten steel passes through the molten steel passage hole 61 of the weir 6 and flows into the heating chamber 1 while being rectified. The inside of the heating chamber 1 is preheated to about 1000° C. using a burner or the like in order to minimize heat loss from the molten steel to the refractories.
加熱室１内に入った溶鋼は゛、ヒータ７により引き続き
加熱される。堰４ａ、４ｂの仕切板は溶鋼の熱により徐
々に溶解され、所定の時間（通常３０〜３００秒）経過
後、窓孔４１を開放させる。これにより溶鋼は鋳込室２
ａ、２ｂに流入し、実質的な鋳込が開始される。The molten steel that has entered the heating chamber 1 is continuously heated by the heater 7. The partition plates of the weirs 4a and 4b are gradually melted by the heat of the molten steel, and after a predetermined period of time (usually 30 to 300 seconds) has passed, the window holes 41 are opened. As a result, the molten steel flows into the casting chamber 2.
a and 2b, and substantial casting begins.
なお、本実施例のようなヒータ７は、ルツボ型の一端閉
塞構造であるため、鋳込前のバーナの予熱ではその内部
に熱が十分伝わらず、予熱不足をきたす。このため溶鋼
注入初期に溶鋼がヒータ内の耐火物表面で凝固し、その
後のヒータによる溶鋼加熱が阻害されてしまうおそれが
ある。このため第１図に示すように、予めヒータ７内に
筒状のインサート材９（鋼製）を挿入しておき、溶鋼注
入前にヒータ７（誘導加熱ヒータ）によりインサート材
９を１０００℃以上に誘導加熱して、ヒータ内の予熱を
行うようにすることが好ましい。このインサート材９は
最終的に溶解させるものであるが、インサート材によっ
て注入された溶鋼の温度低下を生じさせないようにする
ため、ヒータの加熱によってインサート材９が溶融また
は半溶融状態となってから溶鋼の注入室３への注入が行
われる。In addition, since the heater 7 as in this embodiment has a crucible-type structure with one end closed, heat is not sufficiently transmitted to the inside of the heater 7 when preheating the burner before casting, resulting in insufficient preheating. For this reason, the molten steel may solidify on the surface of the refractory in the heater at the initial stage of molten steel injection, and subsequent heating of the molten steel by the heater may be inhibited. For this purpose, as shown in Fig. 1, a cylindrical insert material 9 (made of steel) is inserted into the heater 7 in advance, and the insert material 9 is heated to a temperature of 1000°C or higher using the heater 7 (induction heater) before pouring the molten steel. Preferably, the heater is preheated by induction heating. This insert material 9 is to be finally melted, but in order to prevent the temperature of the injected molten steel from decreasing due to the insert material, the insert material 9 is melted or semi-molten by heating with a heater. Molten steel is poured into the injection chamber 3.
失庭鰹
２５０ｔｏｎの溶鋼を第１図に示すような構造のタンデ
ッシュを使用し、２ストランドで連続鋳造した。その製
造条件は以下の通りである。なお、仕切板の厚さは、事
前の実験によって得られた第４図に基づき、溶鋼接触後
３００秒で溶解するような厚さに選定した。Two strands of 250 tons of molten steel were continuously cast using a tundish having the structure shown in Figure 1. The manufacturing conditions are as follows. The thickness of the partition plate was selected based on FIG. 4 obtained from a preliminary experiment so that it would melt in 300 seconds after contact with molten steel.
タンデッシュ容量 ２５ｔｏｎ
ヒ − タ 容 量 ５００ ｋ讐仕切
板板厚 １５ ｍｍ
第５図は、仕切板溶解後の時点からのタンブツシュ内溶
鋼温度の変化を調べたもので、本発明法によれば、鋳造
全域に亘って溶鋼温度詮略目標温度（約±３°Ｃ）に保
持できていることが判る。一方、第３図中破線は従来の
鋳造法による場合の溶鋼温度を示しており、溶鋼温度は
鋳造初期に大幅（約２０℃）に低下し、このため、この
ような温度低下分を見込んで′ａ鋼湿温度かなり高め（
約１５４０℃）に設定されている。Tundish capacity: 25 tons Heater capacity: 500 kg Divider plate thickness: 15 mm Figure 5 shows the changes in the temperature of molten steel inside the tundish from the time after the partition plate has been melted.According to the method of the present invention, casting It can be seen that the molten steel temperature can be maintained at approximately the target temperature (approximately ±3°C) over the entire area. On the other hand, the broken line in Figure 3 shows the molten steel temperature when using the conventional casting method, and the molten steel temperature drops significantly (approximately 20°C) in the early stages of casting, so this temperature drop is taken into consideration. 'a Steel humidity temperature is quite high (
The temperature is approximately 1540°C).
以上述べた本発明法によれば、大容量のヒータを用いる
ことなく鋳造初期における溶鋼の過冷却を適切に防止す
ることができる効果がある。According to the method of the present invention described above, it is possible to appropriately prevent overcooling of molten steel in the initial stage of casting without using a large-capacity heater.
また、本発明の装置によればこのような効果に加え、堰
による溶鋼の整流作用しこより加熱室や鋳込室の湯面の
乱れを抑え、しかも加熱室・鋳込室間の堰により加熱室
内に供給される保温用パウダのノズルへの巻き込みを適
切に防止できる効果がある。In addition to the above-mentioned effects, the device of the present invention suppresses turbulence in the molten steel surface in the heating chamber and casting chamber through the rectification of the molten steel by the weir, and furthermore, the weir between the heating chamber and the pouring chamber prevents heating. This has the effect of appropriately preventing the heat-retaining powder supplied into the room from getting caught in the nozzle.
第１図及び第２図は本発明のタンデイツシュの一実施例
を示すもので、第１図は水平断面図、第２図は第１図中
■−■線に沿う断面図である。
第３図は、堰の窓孔及び仕切板の他の実施例を示す説明
図である。第４図は実施例において使用した仕切板の厚
さと溶解時間との関係を示すものである。第５図は実施
例におけるタンデイツシュ内溶鋼温度を示すものである
。
図において、１は加熱室、２ａ 、 ２ｂは鋳込室、３
は注入室、４ａ、４ｂ、６は堰、５は仕切板、７はヒー
タ、８はタンデイツシュノズルである。
（体向＠ ＜ｐ 、、２ Ｈ麹宴没θ１叫（”） ′７
４ｆｖ＠Ｇ’ｋＧ”ｃｔＪ％憧＜ｌ。1 and 2 show an embodiment of the tandem dish of the present invention, in which FIG. 1 is a horizontal sectional view, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. FIG. 3 is an explanatory diagram showing another embodiment of the weir window hole and partition plate. FIG. 4 shows the relationship between the thickness of the partition plate used in the examples and the melting time. FIG. 5 shows the temperature of molten steel in the tundish in Examples. In the figure, 1 is a heating chamber, 2a and 2b are casting chambers, and 3
4a, 4b, 6 are weirs, 5 is a partition plate, 7 is a heater, and 8 is a tangent nozzle. (body direction @ <p ,, 2 H koji banquet θ1 scream (”) ’7
4fv@G'kG”ctJ% admiration<l.
Claims (2)
より低く且つ溶鋼と接触して所定時間経過後に溶解する
ような厚みを有する仕切板を少なくともその一部に有す
る堰によって、ヒータに通じる加熱室とタンデッシュノ
ズルに通じる鋳込室とを形成しておき、鋳造初期におい
て溶鋼を加熱室内に保持してヒータにより加熱し、その
後、前記仕切板の溶解により溶鋼を鋳込室に流入させる
ようにしたことを特徴とする連続鋳造におけるタンデッ
シュ内溶鋼の過冷却防止方法。(1) Heating is conducted to the heater by a weir in which at least a part of the tundish has a partition plate whose melting point is lower than the temperature of the molten steel being injected and whose thickness is such that it melts after a predetermined period of time after coming into contact with the molten steel. A casting chamber communicating with the tundish nozzle is formed, and in the early stage of casting, molten steel is held in the heating chamber and heated by a heater, and then the molten steel is caused to flow into the casting chamber by melting the partition plate. A method for preventing supercooling of molten steel in a tundish in continuous casting, characterized by:
に通じる加熱室と、タンデッシュノズルに通じる鋳込室
とに仕切られ、注入室と加熱室とを仕切る堰に複数の溶
鋼通過孔が形成されるとともに、加熱室と鋳込室とを仕
切る堰の湯面下に位置すべき部分に窓孔が形成され、該
窓孔に、融点が注入される溶鋼の温度よりも低い仕切板
を脱着可能に嵌め込み得るようにしてなる連続鋳造にお
けるタンデッシュ内溶鋼の過冷却を防止するためのタン
デッシュ構造。(2) The inside of the tundish is divided by a weir into an injection chamber, a heating chamber leading to the heater, and a casting chamber leading to the tundish nozzle, and a plurality of molten steel passing holes are provided in the weir separating the pouring chamber and the heating chamber. At the same time, a window hole is formed in the part of the weir that partitions the heating chamber and the casting chamber that should be located below the surface of the molten metal, and a partition plate whose melting point is lower than the temperature of the molten steel to be injected is inserted into the window hole. A tundish structure for preventing overcooling of molten steel in the tundish during continuous casting, which is configured to be removably fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9032188A JPH01262053A (en) | 1988-04-14 | 1988-04-14 | Method for preventing over-cooling of molten steel in tundish for continuous casting and structure of tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9032188A JPH01262053A (en) | 1988-04-14 | 1988-04-14 | Method for preventing over-cooling of molten steel in tundish for continuous casting and structure of tundish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01262053A true JPH01262053A (en) | 1989-10-18 |
| JPH0435260B2 JPH0435260B2 (en) | 1992-06-10 |
Family
ID=13995262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9032188A Granted JPH01262053A (en) | 1988-04-14 | 1988-04-14 | Method for preventing over-cooling of molten steel in tundish for continuous casting and structure of tundish |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01262053A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010194556A (en) * | 2009-02-23 | 2010-09-09 | Kobe Steel Ltd | T type tundish for continuous casting device having excellent floating-up/separation of inclusion |
| CN102009143A (en) * | 2010-12-29 | 2011-04-13 | 北京科技大学 | Channel induction heating device of compact cross-shaped tundish |
-
1988
- 1988-04-14 JP JP9032188A patent/JPH01262053A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010194556A (en) * | 2009-02-23 | 2010-09-09 | Kobe Steel Ltd | T type tundish for continuous casting device having excellent floating-up/separation of inclusion |
| CN102009143A (en) * | 2010-12-29 | 2011-04-13 | 北京科技大学 | Channel induction heating device of compact cross-shaped tundish |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0435260B2 (en) | 1992-06-10 |
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