JPH07299548A - Method for preheating tundish - Google Patents

Method for preheating tundish

Info

Publication number
JPH07299548A
JPH07299548A JP6094998A JP9499894A JPH07299548A JP H07299548 A JPH07299548 A JP H07299548A JP 6094998 A JP6094998 A JP 6094998A JP 9499894 A JP9499894 A JP 9499894A JP H07299548 A JPH07299548 A JP H07299548A
Authority
JP
Japan
Prior art keywords
tundish
oxygen
preheating
burner
amount
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
Application number
JP6094998A
Other languages
Japanese (ja)
Inventor
Yoshihide Kato
嘉英 加藤
Koichi Tozawa
宏一 戸澤
Seiji Nabeshima
誠司 鍋島
Kenichi Tanmachi
健一 反町
Tetsuya Fujii
徹也 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP6094998A priority Critical patent/JPH07299548A/en
Publication of JPH07299548A publication Critical patent/JPH07299548A/en
Pending legal-status Critical Current

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  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

PURPOSE:To improve the quality of the steel by specifying the oxidizing gas to preheat the tundish for the continuous casting to prevent the increase in the oxygen content of the molten steel to be fed after preheating. CONSTITUTION:In a method to preheat the tundish for the continuous casting which is repeatedly used in the hot condition in the intervals of the casting operation, the oxidizing gas to be fed together with the fuel is the substantially pure oxygen, and the amount of oxygen is less than 0.7 times the amount required for the complete combustion of the fuel to be fed. The preheating by the burner is executed in the condition where the tip of the flame from the burner touches the inner wall of the tundish. This constitution eliminates problems such as generation of soot to be caused by the insufficient amount of oxygen and extinction of the flame from the burner, and at the same time, the oxidation of the metal to be left in the tundish is suppressed, promotes the reduction of the slag, and avoids the deterioration of the quality due to the increase of the oxygen content of the molten steel to be fed after the preheating.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、熱間で繰返し使用す
る特に鋼の連続鋳造用タンディッシュの好適な予熱方法
を提案するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention proposes a suitable preheating method for a tundish for continuous casting of steel, which is repeatedly used hot.

【0002】熱間で繰返し使用する連続鋳造用タンディ
ッシュでは、鋳造終了後タンディッシュ内に残った地金
やスラグを排出し、その後、再度溶湯を供給して鋳造に
供する。
In a continuous casting tundish that is repeatedly used hot, the metal and slag remaining in the tundish after the casting is discharged, and then the molten metal is supplied again for casting.

【0003】その際、地金やスラグの排出から再び注湯
するまでの時間が長かったり、2基のタンディッシュを
計画的に交互に使用する場合、タンディッシュ内の温度
が低下し、次のチャージのスタート時に溶湯がタンディ
ッシュ内でその一部が凝固し、ノズル詰まりなどが発生
して鋳込みが不可能になる。
At this time, if the time from the discharge of the metal or slag to the re-pouring is long, or two tundishes are intentionally used alternately, the temperature in the tundish lowers and At the start of charging, the molten metal partially solidifies in the tundish, causing nozzle clogging and other problems, making casting impossible.

【0004】これを防止するために、通常タンディッシ
ュ内を気体、液体もしくは固体燃料を用いて完全燃焼さ
せることによって予熱する。なお、予熱を強化すため酸
素を富化して燃焼させることもある。このようなタンデ
ィッシュの予熱の際の燃焼ガスには、二酸化炭素(CO
2 )や水蒸気(H2 O)が含まれるほか、完全燃焼の場
合には燃焼につかわれなかった余剰の酸素(O2)も存在
する。なお、一般に窒素も含まれる。
In order to prevent this, the inside of the tundish is usually preheated by completely burning it with a gas, liquid or solid fuel. In addition, oxygen may be enriched and burned to enhance preheating. Carbon dioxide (CO 2) is contained in the combustion gas when preheating the tundish.
2 ) and water vapor (H 2 O), and in the case of complete combustion, there is also excess oxygen (O 2 ) that was not used for combustion. Note that nitrogen is also generally included.

【0005】一方、繰返し使用するタンディッシュ内に
おいて、鋳造後地金やスラグを排出しても、それらが完
全に除去されるわけではなく、通常それらの一部すなわ
ち、地金やスラグが残存する。それゆえ、その後の予熱
において燃焼ガス中にたとえ余剰の酸素がない場合でも
CO2 及びH2 Oなどとタンディッシュ内に残存する地
金が CO2 +Fe → FeO+CO ---- (1) H2 O+Fe → FeO+H2 ---- (2) のように反応してしまい、その後の鋳造時の注湯初期に
おいて溶湯の汚染が顕在化し、得られる鋳片の品質が低
下するという問題があり、その解決が望まれていた。
On the other hand, in a tundish which is repeatedly used, even if the metal or slag is discharged after casting, it is not completely removed, and a part of them, that is, the metal or slag usually remains. . Therefore, in the subsequent preheating, even if there is no excess oxygen in the combustion gas, CO 2 and H 2 O and the metal remaining in the tundish are CO 2 + Fe → FeO + CO ---- (1) H 2 There is a problem that the reaction such as O + Fe → FeO + H 2 ---- (2) occurs, the contamination of the molten metal becomes apparent at the initial stage of pouring during the subsequent casting, and the quality of the obtained slab deteriorates. A solution was desired.

【0006】[0006]

【従来の技術】このような問題を解決する手段として、
例えば特開平4−22567 号公報(再使用タンディッシュ
の加熱方法)には使用する酸化性ガスを空気として、該
空気量をガスバーナーによる理論必要空気量の70〜100
%とすることによってタンディッシュ内に残存する地金
の酸化を抑制する方法が開示されている。
2. Description of the Related Art As means for solving such a problem,
For example, in Japanese Patent Laid-Open No. 4-22567 (heating method for reusable tundish), the oxidizing gas used is air, and the air amount is 70 to 100 of the theoretical air amount required by a gas burner.
There is disclosed a method of suppressing the oxidation of the bare metal remaining in the tundish by setting the content to be%.

【0007】また、特開平4−238656号公報(連続鋳造
用タンディッシュの再使用方法)においては、上記と同
様に不完全燃焼下でタンディッシュの予熱を行う際に、
酸素を富化し空気を用い、空気比を0.7 〜0.98とする方
法も開示されている。
Further, in Japanese Unexamined Patent Publication No. 4-238656 (a method for reusing a tundish for continuous casting), when preheating the tundish under incomplete combustion as described above,
A method of enriching oxygen and using air to obtain an air ratio of 0.7 to 0.98 is also disclosed.

【0008】しかし、これら手段によっても当該空気比
では残存する地金の完全な無酸化を達成することは不可
能であり、高品質で手入れ無しの鋳片を安定して鋳造す
るにはなお問題を残していた。
However, even with these means, it is impossible to achieve complete oxidation-free of the remaining metal with the air ratio, and it is still problematic to stably cast a high quality and unmaintained cast piece. Was left.

【0009】[0009]

【発明が解決しようとする課題】この発明は、繰返し使
用する連続鋳造用タンディッシュの耐火物内壁温度を低
下させることなく、しかも内壁に残存する地金の酸化を
抑制するとともにスラグの還元を促進し、支障なく連続
鋳造ができ、かつ得られる鋳片の品質の劣化を防止でき
るタンディッシュの好適な予熱方法を提案することを目
的とする。
SUMMARY OF THE INVENTION The present invention does not lower the temperature of the refractory inner wall of a continuous casting tundish that is repeatedly used, suppresses the oxidation of the metal remaining on the inner wall, and promotes the reduction of slag. However, it is an object of the present invention to propose a suitable preheating method for a tundish that can perform continuous casting without any trouble and can prevent deterioration of the quality of the obtained slab.

【0010】[0010]

【課題を解決するための手段】この発明の要旨とすると
ころは以下の通りである。熱間で繰返し使用する連続鋳
造用タンディッシュ内を鋳造の合間に、燃料と酸化性ガ
スを用いたバーナーで予熱する方法において、供給する
酸化性ガスを実質的に純粋な酸素とし、その酸素量を供
給する該燃料を完全に燃焼させるのに必要な量の0.7 倍
未満とすることを特徴とするタンディッシュの予熱方法
であり、さらに上記の方法において、バーナーによる予
熱を、バーナーの火炎の先端がタンディッシュの内壁に
当る状態で行うものである。
The gist of the present invention is as follows. In the method of preheating a tundish for continuous casting that is repeatedly used hot between castings with a burner using a fuel and an oxidizing gas, the oxidizing gas to be supplied is substantially pure oxygen, and its oxygen content Is a preheating method for the tundish, characterized in that it is less than 0.7 times the amount required to completely burn the fuel to be supplied. Is performed while touching the inner wall of the tundish.

【0011】[0011]

【作用】この発明の作用を以下に述べる。この発明は、
前記したように連続鋳造用タンディッシュを鋳造の合間
にバーナーで予熱する際、完全燃焼に必要な酸素量の0.
7 倍未満の量の実質的に純粋な酸素を、燃料とともにバ
ーナーに供給し燃焼させることを骨子とするものであ
り、かくすることにより、燃焼ガス中に含有するCO2
やH2 Oを低く抑えることができ、タンディッシュ内に
残存する地金の酸化を抑制し、さらにはタンディッシュ
内スラグの還元も促進する。
The operation of the present invention will be described below. This invention
When preheating the tundish for continuous casting with a burner between castings as described above, the oxygen content of 0.
The main idea is to supply a burner with a fuel, which is less than 7 times the amount of substantially pure oxygen, and burn it. By doing so, the CO 2 contained in the combustion gas is reduced.
And H 2 O can be kept low, oxidation of the metal remaining in the tundish can be suppressed, and further reduction of slag in the tundish can be promoted.

【0012】したがって、その予熱後の鋳造の際には、
供給される溶鋼中の酸素濃度の上昇を防止でき、品質の
良好な鋳片を得ることができる。この発明において、供
給酸素量を完全燃焼に必要な量の0.7 倍未満とした理由
は、それ以上の量の酸素を供給すると、燃焼ガス組成中
に、タンディッシュ内に残存する地金の酸化ガス成分で
あるCO2 やH2 Oの含有比率が増加して地金を酸化
し、その予熱後に鋳造される鋳片の品質を劣化させるた
めである。
Therefore, during casting after the preheating,
It is possible to prevent an increase in oxygen concentration in the molten steel supplied, and to obtain a slab with good quality. In this invention, the reason why the amount of oxygen supplied is less than 0.7 times the amount required for complete combustion is that when more oxygen is supplied, the oxidizing gas of the metal remaining in the tundish in the combustion gas composition. This is because the content ratio of the components CO 2 and H 2 O is increased to oxidize the base metal and deteriorate the quality of the slab cast after its preheating.

【0013】そして、供給酸素量を完全燃焼に必要な量
の0.7 倍未満とする場合、これまでの技術では、未燃焼
のススの生成、バーナーにおける火炎の消滅現象の発生
あるいは加熱温度不足などが問題となっていたが、発明
者らが種々実験検討の結果、供給酸素源として、従来例
のように窒素を多量に含有する空気もしくは酸素を富化
した空気を用いるのではなく、実質的に純粋な酸素を用
いることにより、供給酸素量が完全燃焼に必要な量の0.
7 倍未満であっても、ススの生成はなく、バーナーでの
火炎の消滅もなく、さらには十分高温まで加熱できると
いう特段の効果が得られることを新規に知見した。
When the amount of oxygen supply is set to less than 0.7 times the amount required for complete combustion, the conventional techniques have a problem in that unburned soot is generated, a flame extinguishing phenomenon occurs in the burner, or the heating temperature is insufficient. Although it was a problem, as a result of various experiments conducted by the inventors, as the supply oxygen source, rather than using air containing a large amount of nitrogen or air enriched with oxygen as in the conventional example, it is practically possible. By using pure oxygen, the amount of oxygen supplied is 0, which is the amount required for complete combustion.
It was newly found that even if it is less than 7 times, soot is not generated, the flame in the burner is not extinguished, and a special effect that it can be heated to a sufficiently high temperature is obtained.

【0014】ここで、実質的に純粋な酸素としては、酸
素濃度が98%以上のものを用いることがよく、燃料とし
ては気体、液体もしくは固体いずれのものでもよい。
Here, as the substantially pure oxygen, it is preferable to use one having an oxygen concentration of 98% or more, and the fuel may be gas, liquid or solid.

【0015】なお、上記において、未燃焼のススが生成
することは、極低炭素鋼の鋳造の場合、タンディッシュ
内において、供給される溶湯の炭素濃度を上昇させ、得
られる鋳片のC含有量が上限を外れることになり好まし
くない。
In the above, the formation of unburned soot increases the carbon concentration of the molten metal supplied in the tundish in the case of casting ultra-low carbon steel, and the C content of the obtained slab is increased. The amount is out of the upper limit, which is not preferable.

【0016】さらに、この発明のように還元性を強くし
た場合は、バーナーによる加熱効率が低下する恐れがあ
る。この点に関しても発明者らは種々実験検討を繰り返
し行った結果、バーナーによる火炎の先端がタンディッ
シュの炉壁に当るようにして加熱すれば、所定の還元度
に応じた火炎温度による最大の熱移動が達成されること
を知見した。すなわち、バーナーによる火炎の先端がタ
ンディッシュ内壁から遠く離れても、また近付けすぎて
火炎の中央部を内壁に当てても火炎からの熱移動を最大
化することはできなかった。
Further, when the reducing property is strengthened as in the present invention, the heating efficiency of the burner may decrease. With respect to this point as well, the inventors conducted various experimental studies, and as a result, if the tip of the flame by the burner hits the wall of the tundish to heat it, the maximum heat due to the flame temperature according to the predetermined reduction degree is obtained. We have found that migration is achieved. That is, even if the tip of the flame by the burner was far away from the inner wall of the tundish, or too close to the inner wall of the tundish, the heat transfer from the flame could not be maximized.

【0017】したがって、バーナーチップの構造やバー
ナーの位置、燃料及び酸素量などを調整し、火炎の先端
がタンディッシュ内壁に当るようにすることにより、酸
素量が燃料の完全燃焼に必要な量の0.7 倍未満であって
も、さほど熱効率を低下させることなくタンディッシュ
を予熱できることになる。
Therefore, by adjusting the structure of the burner tip, the position of the burner, the amount of fuel and oxygen, and so that the tip of the flame hits the inner wall of the tundish, the amount of oxygen is adjusted to the amount required for complete combustion of the fuel. Even if it is less than 0.7 times, the tundish can be preheated without significantly lowering the thermal efficiency.

【0018】以上のように、この発明は、バーナーに供
給する酸素量を同じくバーナーに供給する燃料の完全燃
焼に必要な量の0.7 倍未満とすることにより、タンディ
ッシュ内に残存する地金の酸化を防止するとともに同じ
く残存するスラグをも還元し、これまでの技術では、上
記のように酸素量が少ない場合に発生する未燃焼ススの
生成、バーナーでの火炎の消滅、加熱温度不足などの問
題も、酸素源として実質的に純酸素を用いることにより
解消し、さらに火炎の先端をタンディッシュ内壁に当る
ようにすることにより熱効率の低下を防止するものであ
る。
As described above, according to the present invention, the amount of oxygen supplied to the burner is set to less than 0.7 times the amount required for complete combustion of the fuel also supplied to the burner, so that the amount of metal remaining in the tundish is reduced. It also prevents oxidization and also reduces residual slag.In the technology up to now, the generation of unburned soot that occurs when the oxygen amount is low as described above, the extinction of the flame in the burner, the insufficient heating temperature, etc. The problem is also solved by using substantially pure oxygen as the oxygen source, and further, the tip of the flame is brought into contact with the inner wall of the tundish to prevent a decrease in thermal efficiency.

【0019】したがって、この発明方法によって予熱し
たタンディッシュを用いて連続鋳造を行うことにより品
質の良好な鋳片を得ることができる。
Therefore, by performing continuous casting using the tundish preheated by the method of the present invention, it is possible to obtain a slab of good quality.

【0020】[0020]

【実施例】溶鋼を取鍋からタンディッシュを経て鋳造モ
ールドに供給し、冷却凝固して鋳片とする連続鋳造操業
を繰り返し行った。
[Example] A continuous casting operation in which molten steel was supplied from a ladle through a tundish to a casting mold and cooled and solidified to form a slab was repeatedly performed.

【0021】その際タンディッシュは2基を交互に使用
し、一方のタンディッシュが鋳造に使用されているとき
は、他方の待機中のタンディッシュは、所定位置にてガ
スバーナー3個を用いて次の鋳造に使用するまで予熱を
続けた。
At that time, two tundishes are alternately used, and when one tundish is used for casting, the other tundish in standby uses three gas burners at predetermined positions. Preheating was continued until it was used for the next casting.

【0022】タンディッシュの予熱は、表1に示す組成
になる燃料ガスを用い、その供給量は300 〜800 Nm3
/時間(バーナー1個あたり)とし、酸素源としては、
空気又は純度:99%以上の純酸素を用い、酸素としての
供給量を、供給される燃料を完全燃焼させるのに必要な
量の0.3 〜1.1 倍の間で変化させるとともに、火炎の先
端の位置も変化させて行った。
For the preheating of the tundish, the fuel gas having the composition shown in Table 1 was used, and the supply amount thereof was 300 to 800 Nm 3.
/ Hour (per burner), as the oxygen source,
Air or purity: Use pure oxygen of 99% or more, change the supply amount as oxygen between 0.3 to 1.1 times the amount required to completely burn the supplied fuel, and position the tip of the flame. I also changed.

【0023】[0023]

【表1】 [Table 1]

【0024】なお、上記タンディッシュの予熱におい
て、ガスバーナーには空気旋回型で燃料と酸素との予混
合が可能なものを使用し、タンディッシュ内は密閉状態
で予熱し燃焼ガスは排滓孔から放出した。また、予熱時
間は上記各条件とも300 〜320分間の範囲であった。
In the preheating of the tundish, a gas burner of an air swirling type capable of premixing fuel and oxygen is used, the inside of the tundish is preheated in a closed state, and the combustion gas is discharged through a slag hole. Released from. The preheating time was in the range of 300 to 320 minutes for each of the above conditions.

【0025】このように各条件で予熱したタンディッシ
ュを用いてそれぞれ連続鋳造を行ない、それらの操業状
況を調査するとともにタンディッシュに溶鋼を注湯しは
じめてからその供給量が70tに達した時点でのタンディ
ッシュ内の溶湯深さ約50cmの位置からサンプルを採取し
て酸素含有量を測定し、タンディッシュ内における酸素
濃度の上昇量を調査した。
Continuous casting was carried out using the tundish preheated under the respective conditions as described above, the operating conditions thereof were investigated, and at the time when the molten steel began to be poured into the tundish and the supply amount reached 70t. The oxygen content was measured by collecting a sample from the position of the molten metal depth of about 50 cm in the tundish, and the increase amount of oxygen concentration in the tundish was investigated.

【0026】なお、各条件とも連続鋳造ができたものに
ついては6〜10チャージの範囲で連続鋳造を行い調査し
た。
For each condition, continuous casting was conducted in the range of 6 to 10 charges, and the continuous casting was investigated.

【0027】これらの調査結果を予熱条件とともに表2
にまとめて示す。
The results of these investigations are shown in Table 2 together with the preheating conditions.
Are shown together.

【0028】[0028]

【表2】 [Table 2]

【0029】表2から、この発明にしたがう適合例は、
タンディッシュの予熱はもちろんのこと、その予熱した
タンディッシュを用いた連続鋳造も何ら支障なく行うこ
とができ、かつ、タンディッシュ内での溶鋼の酸素濃度
の上昇はほとんどなく、比較例にくらべても極めて優れ
ていることが分る。
From Table 2, the adapted example according to the present invention is
Not only the preheating of the tundish, but also the continuous casting using the preheated tundish can be performed without any trouble, and the oxygen concentration of the molten steel in the tundish hardly rises, which is more than the comparative example. It turns out that is also extremely excellent.

【0030】したがって、この発明方法により予熱した
タンディッシュを用いて鋳造される鋳片は品質の良好な
ものが得られることになる。
Therefore, the slab cast by using the tundish preheated by the method of the present invention can be of good quality.

【0031】なお、識別No. 3とNo. 6及びNo. 7と
は、タンディッシュ予熱の際の火炎先端の位置を変えた
ものであるが、所定温度に予熱維持するために必要な燃
料ガスの単位時間当りの供給量は、No. 3の場合にくら
べ、No. 6及びNo. 7の場合はそれぞれ1.5 倍及び1.8
倍多く、火炎先端が内壁に当る状態で加熱することが加
熱効率を最大にできることを確認した。
Identification No. 3 and No. 6 and No. 7 are obtained by changing the position of the flame tip at the time of preheating the tundish, but the fuel gas required to maintain the preheating at a predetermined temperature. The amount of supply per unit time of No. 3 is 1.5 times and that of No. 6 and No. 7 is 1.8 times, respectively.
It was confirmed that the heating efficiency can be maximized by heating with the flame tip hitting the inner wall twice as much.

【0032】[0032]

【発明の効果】この発明は、繰り返し使用する連続鋳造
用タンディッシュを鋳造の合間にバーナーで予熱するに
あたり、バーナーに供給する酸化性ガスを実質的に純粋
な酸素とし、その酸素量を燃料の完全燃焼に必要な量の
0.7 倍未満とするものであり、この発明によれば、酸素
量が少ないことによって生じるススの生成、バーナーで
の火炎の消滅などの問題を解消するとともに、熱効率を
低下させることなく予熱でき、かつ、タンディッシュ内
に残存する地金の酸化を防止するばかりでなくスラグの
還元を促進して、予熱後に供給される溶湯の酸素濃度の
上昇による鋳片の品質劣化が回避できるようになる。し
たがってこの発明は、連続鋳造で製造される鋼材の品質
改善に多大の効果を発揮する。
According to the present invention, in preheating a tundish for continuous casting, which is repeatedly used, between castings with a burner, the oxidizing gas supplied to the burner is substantially pure oxygen, and the oxygen amount of the fuel is set to the amount of oxygen The amount needed for complete combustion
According to the present invention, the problems such as the generation of soot and the extinction of the flame in the burner caused by the small amount of oxygen can be solved, and the preheating can be performed without lowering the thermal efficiency, and Not only can the oxidation of the metal remaining in the tundish be prevented, but also the reduction of the slag can be promoted, and the deterioration of the quality of the cast slab due to the increase in the oxygen concentration of the molten metal supplied after preheating can be avoided. Therefore, the present invention exerts a great effect on the quality improvement of the steel material produced by continuous casting.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 鍋島 誠司 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社技術研究本部内 (72)発明者 反町 健一 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社技術研究本部内 (72)発明者 藤井 徹也 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社技術研究本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Nabeshima, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Technical Research Division, Kawasaki Steel Co., Ltd. (72) Kenichi Sorimachi 1, Kawasaki-cho, Chuo-ku, Chiba (72) Inventor Tetsuya Fujii, 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside Kawasaki Steel Co., Ltd. Technical Research Headquarters

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 熱間で繰返し使用する連続鋳造用タンデ
ィッシュ内を鋳造の合間に、燃料と酸化性ガスを用いた
バーナーで予熱する方法において、 供給する酸化性ガスを実質的に純粋な酸素とし、その酸
素量を供給する該燃料を完全に燃焼させるのに必要な量
の0.7 倍未満とすることを特徴とするタンディッシュの
予熱方法。
1. A method of preheating a tundish for continuous casting, which is repeatedly used hot, between castings with a burner using a fuel and an oxidizing gas, wherein the oxidizing gas supplied is substantially pure oxygen. And the amount of oxygen is less than 0.7 times the amount required to completely burn the fuel to be supplied, and the tundish preheating method.
【請求項2】 請求項1に記載の方法において、バーナ
ーによる予熱を、バーナーの火炎の先端がタンディッシ
ュの内壁に当る状態で行うものとするタンディッシュの
予熱方法。
2. The tundish preheating method according to claim 1, wherein the preheating by the burner is performed in a state where the tip of the flame of the burner hits the inner wall of the tundish.
JP6094998A 1994-05-09 1994-05-09 Method for preheating tundish Pending JPH07299548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6094998A JPH07299548A (en) 1994-05-09 1994-05-09 Method for preheating tundish

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6094998A JPH07299548A (en) 1994-05-09 1994-05-09 Method for preheating tundish

Publications (1)

Publication Number Publication Date
JPH07299548A true JPH07299548A (en) 1995-11-14

Family

ID=14125527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6094998A Pending JPH07299548A (en) 1994-05-09 1994-05-09 Method for preheating tundish

Country Status (1)

Country Link
JP (1) JPH07299548A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108202129A (en) * 2017-12-26 2018-06-26 中车戚墅堰机车车辆工艺研究所有限公司 A kind of casting mould nozzle flame heating unit
KR20220088928A (en) 2019-11-29 2022-06-28 제이에프이 스틸 가부시키가이샤 Molten steel casting method, continuous casting slab manufacturing method and bearing steel manufacturing method
CN115255305A (en) * 2022-08-23 2022-11-01 山东莱钢永锋钢铁有限公司 Method for baking tundish of continuous casting machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108202129A (en) * 2017-12-26 2018-06-26 中车戚墅堰机车车辆工艺研究所有限公司 A kind of casting mould nozzle flame heating unit
KR20220088928A (en) 2019-11-29 2022-06-28 제이에프이 스틸 가부시키가이샤 Molten steel casting method, continuous casting slab manufacturing method and bearing steel manufacturing method
CN114746195A (en) * 2019-11-29 2022-07-12 杰富意钢铁株式会社 Method for casting molten steel, method for producing continuously cast slab, and method for producing steel for bearing
CN115255305A (en) * 2022-08-23 2022-11-01 山东莱钢永锋钢铁有限公司 Method for baking tundish of continuous casting machine

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