JPS63207461A - Apparatus for controlling temperature of cast slab - Google Patents
Apparatus for controlling temperature of cast slabInfo
- Publication number
- JPS63207461A JPS63207461A JP3776487A JP3776487A JPS63207461A JP S63207461 A JPS63207461 A JP S63207461A JP 3776487 A JP3776487 A JP 3776487A JP 3776487 A JP3776487 A JP 3776487A JP S63207461 A JPS63207461 A JP S63207461A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- slab
- cast slab
- temperature
- heat
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 13
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002268 wool Anatomy 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、連続鋳造における鋳片の表面品質、内部品質
の改善、および高温出片を目的とした鋳片の温度制御装
置に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a temperature control device for slabs for the purpose of improving the surface quality and internal quality of slabs in continuous casting, and for producing high-temperature slabs. .
（従来の技術）
連続鋳造における鋳片の品質に鋳片温度は重要な意味を
もち、従来からその制御に関して以下に示す方法が提案
されている。(Prior Art) Slab temperature has an important meaning in the quality of slab in continuous casting, and the following methods have been proposed for its control.
良好な表面性状を有する鋳片の製造方法として、特開昭
５２−５０９３３号公報、特開昭５２−６８０３０号公
報に鋳片を保温或いは必要により加熱して鋳片表面温度
を脆化域を超える温度に調整することによシ鋳片表面疵
の発生及びその拡大を防止する方法が提案されている。As a method for producing slabs with good surface properties, Japanese Patent Application Laid-Open No. 52-50933 and Japanese Patent Application Laid-open No. 52-68030 disclose a method of keeping the slab warm or heating it if necessary to lower the surface temperature of the slab to the embrittlement range. A method has been proposed for preventing the occurrence and expansion of surface defects in cast slabs by adjusting the temperature to a temperature that exceeds the above.
良好な内部品質を有する鋳片の製造方法として、本出願
人は特願昭６１−１４４７６０号で、鋳片を保温或いは
凝固末期に加熱することにより鋳片の凝固速度を低下さ
せ、ミクロ偏析を改善する方法を提案した。As a method for producing slabs with good internal quality, the present applicant has disclosed in Japanese Patent Application No. 61-144760 that the solidification rate of slabs is reduced by keeping the slabs warm or heating them at the final stage of solidification, thereby reducing micro-segregation. Suggested ways to improve it.
（発明が解決しようとする問題点）
以上のように、鋳片の温度履歴の制御は重要な課題であ
シ、前記のように連続鋳造における２次冷却帯と切断機
の間の鋳片未凝固部での鋳片温度履歴を高温側に制御す
る方法として、保温カバーによる方法或いは加熱による
方法がある。そこで、保温カバーによる方法、加熱によ
る方法の温度履歴制御の特性について整理すれば、保温
カバーの鋳片温度履歴制御特性については、保温カバー
け鋳片からの放散熱を遮断することによシ鋳片温度履歴
を高めに制御するものであり、その熱遮断性は鋳片から
の受熱により加熱される保温カッ々−の内貼り耐火物温
度により決捷る。したがって、保温カッ々−の制御性は
鋳片の熱量により決定されるもので、加熱、昇温機能は
持っていない。−また、加熱装置の鋳片温度履歴制御特
性については、加熱装置としてガス加熱による方法、誘
導加熱による方法等があるが、凝固過程での鋳片加熱は
鋳片表面の復熱と相捷って凝固シェルの部分的な異常高
温化をもたらし、鋳片のブレーク・アウトなどのトラブ
ルの発生、及び鋳片の急激な復熱に伴う内部割れ発生の
原因になりやすい。又、加熱装置は１台あるいけ鋳片周
方向に複数台組み合せた１組では鋳片表面の限られた部
分の加熱しか行ない得す、鋳片長さ方向の広範囲にわた
る加熱を行なう時は鋳片長さ方向に複数台、複数組を必
要とし、設備費が高いものとなる。(Problems to be Solved by the Invention) As described above, controlling the temperature history of the slab is an important issue, and as mentioned above, the temperature history of the slab in continuous casting is As a method of controlling the temperature history of the slab in the solidification part to a high temperature side, there are a method using a heat insulating cover and a method using heating. Therefore, if we summarize the temperature history control characteristics of the heat insulation cover method and the heating method, we can see that the slab temperature history control characteristics of the heat insulation cover are controlled by cutting off the heat radiated from the slab with the insulation cover. The piece temperature history is controlled to be high, and its thermal insulation properties are determined by the temperature of the inner refractory material of the insulation cup, which is heated by heat received from the slab. Therefore, the controllability of heat retention is determined by the amount of heat in the slab, and it does not have heating or temperature raising functions. - Also, regarding the slab temperature history control characteristics of heating devices, there are methods such as gas heating and induction heating, but heating of the slab during the solidification process is compatible with recuperation of the slab surface. This causes the solidified shell to become locally abnormally high in temperature, which tends to cause problems such as breakout of the slab and the occurrence of internal cracks due to rapid reheating of the slab. In addition, if there is one heating device or multiple heating devices are combined in the circumferential direction of the slab, it is possible to heat only a limited part of the surface of the slab, but when heating a wide range in the longitudinal direction of the slab, it is necessary to heat the slab over a wide area. Multiple units and multiple sets are required in the horizontal direction, resulting in high equipment costs.
以上のように、従来技術は鋳片の温度履歴を高温に推移
させる有効な手段であるものの、保温カッ々−や加熱装
置単独では鋳片の広範囲にわたる加熱昇温を含めた温度
制御には難点を有する。As mentioned above, although the conventional technology is an effective means of changing the temperature history of the slab to a high temperature, it is difficult to control the temperature, including heating the slab over a wide range, using a heat retention device or a heating device alone. has.
本発明は、上述した従来技術の問題点に鑑み、２次冷却
帯と切断機間の温度履歴を自在に制御する装置を提供す
るものである。In view of the problems of the prior art described above, the present invention provides a device that freely controls the temperature history between the secondary cooling zone and the cutting machine.
（問題点を解決するための手段）
本発明は、連続鋳造における凝固過程での鋳片温度制御
装置であり、断熱性の耐火物で内張りし鋳片の周方向に
空間を隔てて設けると共に鋳片の長さ方向に延在させた
保温カバーと該保温カバー内へ高温ガスを吹込む加熱装
置とを一組とした鋳片温度制御装置を連続鋳造機の二次
冷却帯と切断機の間に設けたことを特徴とする鋳片温度
制御装置である。(Means for Solving the Problems) The present invention is a slab temperature control device during the solidification process in continuous casting, which is lined with a heat-insulating refractory material and installed with a space in the circumferential direction of the slab. A slab temperature control device consisting of a heat insulating cover extending in the length direction of the slab and a heating device for blowing high temperature gas into the heat insulating cover is installed between the secondary cooling zone of the continuous casting machine and the cutting machine. This is a slab temperature control device characterized in that it is provided in a.
（作用）
本発明装置は、第１図に例示するように二次冷却帯３と
切断機５の間に保温カバー６と加熱装置７を一組として
一組乃至複数組設ける。第１図は２組設けた例を示した
１、
保温カバー６は断熱性の耐火物で内張シし、鋳片１の周
方向に空間を隔てて設け、かつ鋳片長さ方向に延在させ
る。加熱装置７（ｄ：保温カバー６内の空間へ向けて高
温ガスを吹込む。８は温度計である。(Function) As illustrated in FIG. 1, the apparatus of the present invention includes one or more sets of a heat insulating cover 6 and a heating device 7 between the secondary cooling zone 3 and the cutting machine 5. Figure 1 shows an example in which two sets are provided 1. The insulation covers 6 are lined with a heat-insulating refractory material, are provided with a space in the circumferential direction of the slab 1, and extend in the longitudinal direction of the slab. let Heating device 7 (d: blows high-temperature gas into the space inside the heat insulation cover 6. 8 is a thermometer.
本発明は、鋳造速度など鋳造条件並びに２次冷却条件に
より変化する保温カッ入側人側の鋳片温度を基に、保温
カッマー内への高温ガス吹込み量を制御することにより
保温カッ々−円雰囲気温度を変化させ、鋳片の温度履歴
を目標とする温度履歴に制御するもので、その際、保温
カッ々−内鋳片の全長、全周を均一に加熱、保温可能と
する。The present invention achieves heat retention by controlling the amount of hot gas blown into the heat retention cupper based on the temperature of the slab on the side of the heat retention cup that changes depending on casting conditions such as casting speed and secondary cooling conditions. The temperature history of the slab is controlled to the target temperature history by changing the temperature of the circular atmosphere, and in this case, the entire length and circumference of the slab inside the heat-retaining cup can be uniformly heated and kept warm.
更に詳しく説明すると、鋳片温度を保温カッ々−６の入
側、保温カッマー内、および加熱装置７後面に設けた温
度計８により測定し、保温カッマー６内に吹込む高温ガ
ス温度及び高温ガス量を制御することによシ保温カッ々
−内の温度を変化させ、鋳片からの放散熱量を制御する
。ここでいう保温カッマー同温度は、広義には外気温度
から鋳片表面温度より高い温度域まで含む。To explain in more detail, the temperature of the slab is measured by a thermometer 8 installed on the inlet side of the heat-insulating cutter 6, inside the heat-insulating cutter, and on the rear surface of the heating device 7, and the temperature of the high-temperature gas blown into the heat-insulating cutter 6 and the high-temperature gas are measured. By controlling the amount, the temperature inside the insulation cup is changed, and the amount of heat dissipated from the slab is controlled. In a broad sense, the thermal insulation temperature here includes a range from outside air temperature to a temperature range higher than the slab surface temperature.
次に、本発明を使用した際の鋳片温度履歴について第２
図、第３図を用いて述べる。Next, we will discuss the temperature history of the slab when using the present invention in the second section.
This will be explained using FIG.
第２図は鋳造速度が異なる２種の鋳造条件に対し表面温
度を一定に制御する場合を示す。FIG. 2 shows the case where the surface temperature is controlled to be constant under two types of casting conditions with different casting speeds.
第２図中人とＡ′の温度履歴は、鋳造速度が遅い場合で
あり、このうちＡは鋳片表面温度が低くて凝固が進んだ
状態で保温カバーに入る状態を示し、目標とする温度履
歴がとれないので加熱装置から高温ガスを保温カバー内
に吹込んでＡ′のごとく制御する。又ＢとＢ′の温度履
歴は鋳造速度が速い場合のものであり、このうちＢは鋳
片温度が高く、切断機造の間に凝固が完了しないおそれ
のある場合である。このような場合は保温カッ々−６の
内に加熱装置７から常温の空気のみを吹込み、保温カバ
ー内の温度を低下させ Ｂ／のように目標温度履歴の範
囲に制御する。The temperature history of Chunin A' in Figure 2 is when the casting speed is slow, and A shows the condition where the surface temperature of the slab is low and the slab enters the heat insulating cover in a state where solidification has progressed, and the target temperature is Since the history cannot be taken, high-temperature gas is blown into the heat-insulating cover from the heating device and controlled as shown in A'. Furthermore, the temperature histories of B and B' are for a case where the casting speed is high, and of these, B is a case where the temperature of the slab is high and solidification may not be completed during the cutting machine. In such a case, only room-temperature air is blown into the heat-insulating cover 6 from the heating device 7 to lower the temperature inside the heat-insulating cover and control the temperature within the range of the target temperature history as shown in B/.
次に第３図は、加熱装置における高温ガス温度及びガス
量の制御に関する説明図であるっＣのような鋳片温度履
歴に対し、保温カバー内の温度履歴を高目に維持したい
場合は、保温カバー内の雰囲気温度確保のために加熱装
置の高温ガス量を上げる方法をとる。、また凝固直前に
鋳片のみを加熱したいようなりのような温度履歴が必要
な場合は、加熱装置の高温ガス量は鋳片加熱用としての
最低量に限定する。Next, Fig. 3 is an explanatory diagram regarding the control of the high-temperature gas temperature and gas amount in the heating device.If you want to maintain the temperature history inside the insulation cover at a high level with respect to the slab temperature history as shown in C, A method is used to increase the amount of high-temperature gas in the heating device in order to maintain the atmospheric temperature inside the heat-insulating cover. In addition, if a temperature history is required such as heating only the slab immediately before solidification, the amount of high-temperature gas in the heating device is limited to the minimum amount for heating the slab.
本発明によシ鋳片の温度制御性が飛躍的に拡大され、品
質のより厳密なコントロール、また出片温度コントロー
ルが可能となる。According to the present invention, the temperature controllability of the cast slab is dramatically expanded, and it becomes possible to more strictly control the quality and control the temperature of the cast slab.
本発明の技術的手段が従来技術に比較して有利に作用す
る理由は次のとおりである。The reason why the technical means of the present invention works more advantageously than the prior art is as follows.
保温カッ々−の熱遮断性の向上
保温カバーは鋳片から大気への輻射熱を遮断するが、鋳
片と保温カバー内空気との熱対流がこれに影響を与える
。したがって、従来の保温カッ々−け熱対流を防止する
ため鋳片と保温カバーの空間を出来るだけ小さくするよ
う設計している。Improving heat-insulating properties of heat-retaining heat-insulating covers The heat-insulating cover blocks radiant heat from the slab to the atmosphere, but heat convection between the slab and the air inside the heat-insulating cover affects this. Therefore, in order to prevent heat convection that would otherwise occur in the conventional heat-insulating structure, the space between the slab and the heat-insulating cover is designed to be as small as possible.
しかしながら、鋳造断面サイズが変わる連鋳機でそれに
固定した保温カッ々−を用いる方式では、保温カバーの
大きさを最大鋳片断面サイズに合わせて設計しなければ
ならず、鋳片サイズが小さい場合は空間があき、熱対流
の影響を受けるため保温能が低下する。また、保温カバ
ー内の雰囲気が加熱される迄時間を要する為、保温効果
の応答性が悪い。However, when using a continuous casting machine with variable casting cross-sectional size and using a heat-insulating cover fixed to it, the size of the heat-insulating cover must be designed to match the maximum slab cross-sectional size, and when the slab size is small, Since the space is open and affected by heat convection, the heat retention ability decreases. Furthermore, since it takes time for the atmosphere inside the heat insulation cover to be heated, the responsiveness of the heat insulation effect is poor.
本発明による高温ガス導入は保温カバー内温度の上昇、
内壁温度の上昇をもたらす為、保温性能応答性が向上す
る。The introduction of high-temperature gas according to the present invention increases the temperature inside the insulation cover,
As the inner wall temperature increases, the response of heat retention performance improves.
鋳片表面広範囲への均一加熱、保温が可能保温カッ々−
内へ高温ガスを吹き込むので保温カバー円はほぼ同一温
度とすることができ、保温カバー内の鋳片表面は均一に
加熱、あるいけ保温され、局部的な温度ムラの解消を計
ることができる。Enables uniform heating and heat retention over a wide area of the slab surface. Excellent heat retention.
Since high-temperature gas is blown inside, the heat insulating cover circles can be kept at almost the same temperature, and the surface of the slab inside the heat insulating cover is uniformly heated and kept warm, making it possible to eliminate local temperature unevenness.
（実施例）
鋳片サイズ１６２ｒｆｉのビレット連鋳機において、鋳
型上端から６．０〜１５．０ｍの区間に保温カバーを設
置した。保温カバーは２４７Ｘ３００＋ｍサイズの鋳片
鋳造用としても利用される為、保温力・く−内壁に内貼
りしたカオウール表面と鋳片の距離は、１６２φの場合
について上、側面で約２００節の空間をもつものを使用
した。(Example) In a billet continuous casting machine with a billet size of 162rfi, a heat insulation cover was installed in a section from 6.0 to 15.0 m from the upper end of the mold. Since the insulation cover is also used for casting slabs of size 247 x 300 + m, the distance between the surface of the Kao wool attached to the inner wall of the insulation cover and the slab is approximately 200 knots on the top and side for a case of 162φ. I used what I had.
又、保温カバーの直後の１５．０ ｍから１８．５ ｍ
の区間に加熱装置としてガスノ々−ナーを用い、鋳片周
方向に４個設置して高温ガス噴射方向を保温カバー内に
向けた。Also, from 15.0 m to 18.5 m immediately after the thermal cover.
Four gas nozzles were used as heating devices in the section, and four of them were installed in the circumferential direction of the slab, and the hot gas injection direction was directed into the heat insulation cover.
以上のような装置構成で、５４８Ｃの鋳片をサイズ１６
２ｆ、鋳造速度２．０ ｍ１０で鋳造したところ、保温
カバー内での鋳片温度は目標とする１２５０℃〜１３０
０℃に保持され、かつ鋳片長さ方向での温度ムラもなく
、表面疵の発生および偏析を防止できた。With the above equipment configuration, 548C slabs are processed into size 16
When casting at 2f and casting speed of 2.0 m10, the temperature of the slab inside the heat insulation cover was the target of 1250℃ to 130℃.
The temperature was maintained at 0°C, and there was no temperature unevenness in the longitudinal direction of the slab, making it possible to prevent surface flaws and segregation.
（発明の効果）
以上の説明のように、本発明によシ、２次冷却帯、切断
機間での鋳片温度履歴を制御すれば鋳片長さ方向全長に
わたりほぼ均一に制御でき、鋳片品質の向上、高温出片
の可能な連続鋳造を実現できる。(Effects of the Invention) As explained above, by controlling the temperature history of the slab between the steel, the secondary cooling zone, and the cutting machine according to the present invention, it is possible to control the temperature almost uniformly over the entire length of the slab. It is possible to achieve continuous casting that improves quality and enables high-temperature extrusion.
第１図は本発明の装置の一例を示す図、第２図。
第３図は本発明を使用する際の鋳片表面の温度履歴を示
す図である。
１：＠片、２：＠型、３：二次冷却帯、４ニガイドロー
ラー、５：切断機、６：保温カバー、７：加熱装置、８
：温度計。
代理人 弁理士 秋 沢 政 光
他１名FIG. 1 is a diagram showing an example of the apparatus of the present invention, and FIG. FIG. 3 is a diagram showing the temperature history of the slab surface when using the present invention. 1: @piece, 2: @mold, 3: secondary cooling zone, 4 guide roller, 5: cutting machine, 6: thermal cover, 7: heating device, 8
:thermometer. Agent: Patent attorney Masamitsu Akizawa and 1 other person
Claims (1)
であり、断熱性の耐火物で内張りし鋳片の周方向に空間
を隔てて設けると共に鋳片の長さ方向に延在させた保温
カバーと該保温カバー内へ高温ガスを吹込む加熱装置と
を一組とした鋳片温度制御装置を連続鋳造機の二次冷却
帯と切断機の間に設けたことを特徴とする鋳片温度制御
装置。(1) A slab temperature control device during the solidification process in continuous casting, which is lined with a heat-insulating refractory and installed with a space in the circumferential direction of the slab, and extends in the length direction of the slab. A slab temperature control device comprising a cover and a heating device for blowing high-temperature gas into the insulation cover is installed between a secondary cooling zone of a continuous casting machine and a cutting machine. Control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3776487A JPS63207461A (en) | 1987-02-23 | 1987-02-23 | Apparatus for controlling temperature of cast slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3776487A JPS63207461A (en) | 1987-02-23 | 1987-02-23 | Apparatus for controlling temperature of cast slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63207461A true JPS63207461A (en) | 1988-08-26 |
Family
ID=12506537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3776487A Pending JPS63207461A (en) | 1987-02-23 | 1987-02-23 | Apparatus for controlling temperature of cast slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63207461A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002283018A (en) * | 2001-03-23 | 2002-10-02 | Nippon Steel Corp | Method for cooling cast slab in multi-size continuous casting facility used for both of bloom and billet and its cooling device |
| DE102010022003A1 (en) | 2009-06-19 | 2010-12-23 | Sms Siemag Ag | Compact-strip-production plant for the production of metal casting strip as pre-product for slabs, comprises mold for casting the casting strip, and a vertical strand guide for guiding and cooling the poured casting strip up to hardening |
| JP2012528720A (en) * | 2009-06-03 | 2012-11-15 | エスエムエス・コンキャスト・アーゲー | Method and apparatus for guiding and directing billets in a continuous casting facility for large size circular profiles |
| US20130139993A1 (en) * | 2010-05-18 | 2013-06-06 | Daniel & C. Officine Meccaniche Spa | Continuous casting device and relative method |
-
1987
- 1987-02-23 JP JP3776487A patent/JPS63207461A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002283018A (en) * | 2001-03-23 | 2002-10-02 | Nippon Steel Corp | Method for cooling cast slab in multi-size continuous casting facility used for both of bloom and billet and its cooling device |
| JP2012528720A (en) * | 2009-06-03 | 2012-11-15 | エスエムエス・コンキャスト・アーゲー | Method and apparatus for guiding and directing billets in a continuous casting facility for large size circular profiles |
| DE102010022003A1 (en) | 2009-06-19 | 2010-12-23 | Sms Siemag Ag | Compact-strip-production plant for the production of metal casting strip as pre-product for slabs, comprises mold for casting the casting strip, and a vertical strand guide for guiding and cooling the poured casting strip up to hardening |
| DE102010022003B4 (en) | 2009-06-19 | 2022-12-29 | Sms Group Gmbh | Vertical continuous caster |
| US20130139993A1 (en) * | 2010-05-18 | 2013-06-06 | Daniel & C. Officine Meccaniche Spa | Continuous casting device and relative method |
| US8863819B2 (en) * | 2010-05-18 | 2014-10-21 | Danieli & C. Officine Meccaniche Spa | Continuous casting device and relative method |
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