JPH0318460A - Continuous casting machine - Google Patents
Continuous casting machineInfo
- Publication number
- JPH0318460A JPH0318460A JP15092289A JP15092289A JPH0318460A JP H0318460 A JPH0318460 A JP H0318460A JP 15092289 A JP15092289 A JP 15092289A JP 15092289 A JP15092289 A JP 15092289A JP H0318460 A JPH0318460 A JP H0318460A
- Authority
- JP
- Japan
- Prior art keywords
- slab
- cast slab
- casting
- dummy bar
- solidification
- 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
- 238000009749 continuous casting Methods 0.000 title claims description 15
- 238000005266 casting Methods 0.000 claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 238000007711 solidification Methods 0.000 claims abstract description 14
- 230000008023 solidification Effects 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000005098 hot rolling Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 9
- 101100406879 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) par-2 gene Proteins 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011838 internal investigation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は連続鋳造機に係り、特に鋳造速度が低速の場合
においても熱間圧延へ高温鋳片を供給し直送圧延が可能
な連続鋳造機に関し、連続鋳造の分野に利用される。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a continuous casting machine, and particularly to a continuous casting machine that is capable of supplying hot slabs to hot rolling and direct rolling even when the casting speed is low. It is used in the field of continuous casting.
近年、省エネルギーおよび工期短縮の観点から，連続鋳
造と熱間圧延工程の直結化プロセスが提案され実現され
つつある。この直送圧延において最も重要な課題は高温
で無欠陥の鋳片を熱延工場に供給することである。In recent years, a process that directly connects continuous casting and hot rolling processes has been proposed and is being realized from the viewpoint of energy saving and shortening of construction period. The most important issue in this direct rolling is to supply hot rolling mills with defect-free slabs at high temperatures.
無欠陥の鋳片を得るため、特開昭６１−８６０５６にお
いては鋳片の切断端面をシールすることによってセンタ
ーボロシティを被覆し酸化の防止を達成している。In order to obtain defect-free slabs, in JP-A-61-86056, the cut end surfaces of the slabs are sealed to cover the center borosities to prevent oxidation.
従来，高温鋳片を得るために、例えば「鉄と鋼」第７４
年（１９８８）Ｎα７の「遠隔地直送圧延を可能にする
高温連鋳スラブの製造技術ＪおよびｒＮＫＫの連鋳一熱
間直送圧延プロセス』等の如く、多くの研究が発表され
ている。すなわち、鋳片の幅方向端部の弱冷却、幅端部
の保熱あるいは輸送中に加熱する方法等がある。また、
特開昭５５−９４７７１においては、鋳片の表面温度を
検出し、表面温度に見合った最も効率のよい切断速度で
切断し、切断時間を短縮すると共に高温鋳片の供給を意
図している．
高温鋳片を得るためには凝固した直後に切断を開始する
必要がある。一方、鋳造速度は品質上の制約、工程の溶
鋼供給能力などにより変化し一定にすることは不可能で
ある。この関係を従来の連続鋳造機について考えてみる
。第３図において，ダミーパー２はダミーバー引上装置
４およびダミーバー力−６を介して運搬され，ｔ４型８
に挿入され鋳造が開始される。鋳片１０はピンチロール
１２および支持ロール１４を通過中に凝固し、トーチ切
断機１６にて切断され、切断鋳片１８となる。Conventionally, in order to obtain high-temperature slabs, for example, "Tetsu to Hagane" No. 74 was used.
Many studies have been published, such as "High-temperature continuous cast slab manufacturing technology J and rNKK's continuous casting - hot direct rolling process" in Nα7 (1988).In other words, There are methods such as weak cooling of the widthwise ends of the slab, heat retention of the width ends, or heating during transportation.
In JP-A-55-94771, the surface temperature of the slab is detected and the slab is cut at the most efficient cutting speed commensurate with the surface temperature, thereby shortening the cutting time and supplying high-temperature slabs. In order to obtain hot slabs, it is necessary to start cutting immediately after solidification. On the other hand, the casting speed varies depending on quality constraints, the molten steel supply capacity of the process, etc., and it is impossible to keep it constant. Let's consider this relationship for a conventional continuous casting machine. In FIG. 3, the dummy par 2 is transported via the dummy bar lifting device 4 and the dummy bar force-6, and the dummy par 2 is transported by a t4 type 8
is inserted and casting begins. The slab 10 solidifies while passing through the pinch rolls 12 and the support rolls 14, and is cut by a torch cutter 16 to become a cut slab 18.
この場合、支持ロール１４の支持域の長さは、最高の鋳
造速度の場合において鋳片の凝固が完了する如く設計さ
れ、その後にトーチ切断機１６が配置されている。従っ
て鋳造速度が遅い場合には凝固が支持ロール１４の支持
域の一部で完了し、凝固のまま残りの支持ロール１４上
を通過し、その後切断されるので、冷却時間が長く鋳片
１０の温度が低下するのを免れることはできない．これ
を防ぐため、鋳造速度の遅い場合には冷却水の散布を停
止するとか、保温カバーを使用して温度低下を防止する
等の方策が取られているが、冷却水の停止でｌ５％程度
，保温カバーの採用で５０％程度の温度低下を防止する
のが限界であり，結果として高温鋳片が得られず、鋳造
速度の遅い場合には鋳片温度が低下し直送圧延が不可能
な現実レこある。In this case, the length of the support area of the support roll 14 is designed such that solidification of the slab is completed at the highest casting speed, after which the torch cutter 16 is arranged. Therefore, when the casting speed is slow, solidification is completed in a part of the support area of the support roll 14, and the slab 10 is passed over the remaining support rolls 14 as solidified, and then cut, so the cooling time is long and the slab 10 is solidified. There is no way to avoid a drop in temperature. In order to prevent this, measures have been taken such as stopping the spraying of cooling water when the casting speed is slow or using a heat insulating cover to prevent the temperature from dropping. , The use of a heat insulating cover can only prevent a temperature drop of about 50%, and as a result, high-temperature slabs cannot be obtained, and when the casting speed is slow, the temperature of the slab drops and direct rolling becomes impossible. There is reality.
本発明の目的は、上記従来技術の問題点を解決し、鋳造
速度の遅い場合にも鋳片の高温を維持し直送圧延の可能
な連続鋳造機を提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a continuous casting machine that solves the above-mentioned problems of the prior art, maintains the high temperature of the slab even when the casting speed is slow, and is capable of direct rolling.
本発明の要旨とするところは次の如くである。 The gist of the present invention is as follows.
すなわち，ダミーバー引上装置およびダミーバーカーを
介してダミーバーを運搬し鋳型に挿入して鋳造を開始し
支持ロールにおいて凝固が完了した鋳片をトーチ切断機
で切断する連１鋳造機において、前記支持ロール設置域
まで上流側に移動可能な前記トーチ切断機と、前記トー
チ切断機の移動に応じて移動可能な前記ダミーバー引上
装置と、を有して或ることを特徴とする連続鋳造機であ
る。That is, in a continuous casting machine in which a dummy bar is conveyed via a dummy bar pulling device and a dummy barker, inserted into a mold, casting is started, and the slab solidified on a support roll is cut by a torch cutting machine, the support roll A continuous casting machine characterized by having the torch cutting machine that is movable upstream to an installation area, and the dummy bar pulling device that is movable in accordance with the movement of the torch cutting machine. .
本発明の詳細を第ｌ図に図示の実施例により説明する。The details of the invention will be explained with reference to the embodiment shown in FIG.
すなわち、本発明においては、トーチ切断機１６は第３
図の従来の移動範囲Ｌに比較して，第１図に示す移動範
囲Ｍの如く上流側に大きく範囲が拡大され広く移動でき
る。すなわち、第２図に示す如く支持ロールエプロン２
０は必要に応じて鋳片進行と直角方向の左右に回転移動
もしくは水平移動することによって待避し、その後に発
生した支持ロール設置域の空間にまでトーチ切断機１６
は移動することができる。また、これに対応して、従来
は固定されていたダミーバー引上装置４も移動範囲Ｎの
領域で移動可能である．〔作用〕
次に，上記の如く移動可能のトーチ切断機１６およびダ
ミーバー引上装置４を有する本発明の連続鋳造機の作用
について説明する。まず、鋳片の品質、寸法および鋳造
速度から鋳造機における鋳片１０の凝固完了位置を推定
する．これは超音波による内部調査あるいは速度を基準
とする実績等から推定できる。次に、上記の推定凝固完
了位置において，トーチ切断機１６によって切断を実施
するのである．
すなわち、鋳造速度が速い場合は第３図に示す従来例と
同様に支持ロールエ４を全部使用して鋳片ｌＯを凝固し
て切断する。That is, in the present invention, the torch cutting machine 16 is
Compared to the conventional movement range L shown in the figure, the range is greatly expanded upstream as shown in the movement range M shown in FIG. 1, allowing for wide movement. That is, as shown in FIG.
The torch cutting machine 16 is evacuated by rotating or moving horizontally to the left and right in the direction perpendicular to the advancement of the slab as necessary, and then the torch cutting machine 16 is moved into the space where the supporting rolls are installed.
can be moved. Correspondingly, the dummy bar lifting device 4, which was conventionally fixed, is also movable within the movement range N. [Function] Next, the function of the continuous casting machine of the present invention having the movable torch cutting machine 16 and the dummy bar pulling device 4 as described above will be explained. First, the solidification completion position of the slab 10 in the casting machine is estimated from the quality, dimensions, and casting speed of the slab. This can be estimated from an internal investigation using ultrasonic waves or actual results based on speed. Next, the torch cutter 16 performs cutting at the estimated solidification completion position described above. That is, when the casting speed is high, the entire supporting roll 4 is used to solidify and cut the slab 10, as in the conventional example shown in FIG.
次に、鋳造速度が遅く、支持ロール設置域内に鋳片の凝
固完了位置が存在すると推定される場合には，第２図に
矢印にて示す如く支持ロールエプロン２０を左右に待避
させ、第１図に示す如く待避後の空間に支持ロール１４
を上流側に移動させる。また、これに対応してダミーバ
ー引上装置４を移動する．これらの移動後に鋳造を実施
すれば、鋳片１０は凝固完了直後にトーチ切断機１６に
おいて切断できる。従って本発明においては、鋳造速度
が遅い場合においても、凝固完了後直ちに切断すること
が可能であるので高′ＩＡ鋳片を熱延工場に供給できる
．
〔実施例〕
第３図に示す如き従来の連１′２鋳造機において、鋳造
速度が最高２ ． ５ ｍ／ｗｉｎの場合に鋳片１０が
凝固できる如き長さの支持ロール１４を設置した。Next, if the casting speed is slow and it is estimated that the solidification completion position of the slab exists within the support roll installation area, the support roll apron 20 is retracted to the left and right as shown by the arrows in FIG. As shown in the figure, a support roll 14 is placed in the space after the evacuation.
move upstream. In addition, the dummy bar lifting device 4 is moved accordingly. If casting is performed after these movements, the slab 10 can be cut by the torch cutting machine 16 immediately after solidification is completed. Therefore, in the present invention, even when the casting speed is slow, it is possible to cut the slab immediately after solidification, so that high IA slabs can be supplied to the hot rolling mill. [Example] In the conventional 1'2 series casting machine as shown in Fig. 3, the maximum casting speed is 2. Support rolls 14 were provided with a length that would allow the slab 10 to solidify at a speed of 5 m/win.
この場合、鋳造速度は１ ． ９ ｍ／ＩＩＩｉｎま５
では直送圧延が可能であったが、１ ． ９ ｍ／ｍｉ
ｎ未満の鋳造速度においては凝固後も鋳片１０は支持ロ
ール１４上を移動し、その間冷却した後切断されるので
鋳片温度が低下し直送圧延は不可能であった。In this case, the casting speed is 1. 9m/IIIinma5
Direct rolling was possible in 1. 9m/mi
At a casting speed of less than n, the slab 10 moves on the support rolls 14 even after solidification, during which time it is cooled and then cut, so the temperature of the slab drops and direct rolling is impossible.
上記従来例に対して、トーチ切断機１６とダミーバー引
上装置４を第１図に示す如く移動可能に改造し、他の部
分は変更しない本発明実施例においては、鋳造速度が遅
い場合に支持ロール設置域内にまでトーチ切断機１６を
上流側に移動して、支持ロール１４上における移動時間
を短縮して凝固後直ちに切断することによって，ｔ４造
速度が１ ． ２ ｍ／ｗｉｎの低速まで直送圧延が可
能となった。In contrast to the conventional example described above, the torch cutting machine 16 and the dummy bar pulling device 4 are modified to be movable as shown in FIG. 1, and the other parts are not changed. By moving the torch cutting machine 16 upstream into the roll installation area to shorten the travel time on the support roll 14 and cutting immediately after solidification, the t4 manufacturing speed can be reduced to 1. Direct rolling is now possible at speeds as low as 2 m/win.
本発明は上記実施例からも明らかな如く、トーチ切断機
を支持ロール設置域まで上流側に移動可能とし、鋳造速
度が遅い場合においても凝固後直ちに切断することによ
って鋳片の高温を維持し直送圧延を可能とする効果を挙
げることができた。As is clear from the above embodiments, the present invention enables the torch cutting machine to be moved upstream to the support roll installation area, and even when the casting speed is slow, by cutting immediately after solidification, the high temperature of the slab can be maintained and the slab can be directly transported. It was possible to achieve the effect of making rolling possible.
第１図は本発明実施例の連続鋳造機の断面図、第２図は
本発明実施例における支持ロールの待避を説明する支持
ロールエプロンの断面図、第３図は従来の連続鋳造機の
断面図である。
２・・・ダミーバー
４・・・ダミーバー引上装置
６・・・ダミーバー力− ８・・・鋳型ｌＯ・・・鋳
片 １４・・・支持口−ル１６・・・トーチ
切断機Fig. 1 is a sectional view of a continuous casting machine according to an embodiment of the present invention, Fig. 2 is a sectional view of a support roll apron illustrating the evacuation of the support roll in an embodiment of the invention, and Fig. 3 is a sectional view of a conventional continuous casting machine. It is a diagram. 2... Dummy bar 4... Dummy bar pulling device 6... Dummy bar force - 8... Mold lO... Slab 14... Support port 16... Torch cutting machine
Claims (1)
てダミーバーを運搬し鋳型に挿入して鋳造を開始し支持
ロールにおいて凝固が完了した鋳片をトーチ切断機で切
断する連続鋳造機において、前記支持ロール設置域まで
上流側に移動可能な前記トーチ切断機と、前記トーチ切
断機の移動に応じて移動可能な前記ダミーバー引上装置
と、を有して成ることを特徴とする連続鋳造機。(1) In a continuous casting machine in which a dummy bar is transported via a dummy bar pulling device and a dummy barker, inserted into a mold to start casting, and a torch cutter cuts the slab after solidification on a support roll, the support roll A continuous casting machine comprising: the torch cutting machine that is movable upstream to an installation area; and the dummy bar pulling device that is movable in accordance with the movement of the torch cutting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15092289A JPH0318460A (en) | 1989-06-14 | 1989-06-14 | Continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15092289A JPH0318460A (en) | 1989-06-14 | 1989-06-14 | Continuous casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0318460A true JPH0318460A (en) | 1991-01-28 |
Family
ID=15507339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15092289A Pending JPH0318460A (en) | 1989-06-14 | 1989-06-14 | Continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0318460A (en) |
-
1989
- 1989-06-14 JP JP15092289A patent/JPH0318460A/en active Pending
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