JPH0667541B2 - Semi-continuous casting method - Google Patents
Semi-continuous casting methodInfo
- Publication number
- JPH0667541B2 JPH0667541B2 JP61037099A JP3709986A JPH0667541B2 JP H0667541 B2 JPH0667541 B2 JP H0667541B2 JP 61037099 A JP61037099 A JP 61037099A JP 3709986 A JP3709986 A JP 3709986A JP H0667541 B2 JPH0667541 B2 JP H0667541B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- continuous casting
- top portion
- casting
- continuous
- 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 - Fee Related
Links
- 238000009749 continuous casting Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は連鋳片のトップ部の歩留りを向上し得る半連続
鋳造方法に関する。Description: TECHNICAL FIELD The present invention relates to a semi-continuous casting method capable of improving the yield of the top portion of a continuous cast piece.
（従来の技術） 一般に鋳塊又は鋳片の造塊に際しては、そのトップ部の
収縮が大きく、製品の歩留りの低下を招いている。その
対策として、従来、普通造塊法では、溶湯注入が終了し
た後、トップ部に保温剤を置くとか、燃焼後再度発熱剤
を置き更に保温剤を置くとかして、上部から熱が奪われ
ることを防いでいる。(Prior Art) Generally, when an ingot or a slab is ingot, the top portion of the ingot is largely shrunk, resulting in a decrease in product yield. As a countermeasure against this, in the conventional ingot making method, heat is taken from the upper part by placing a heat retaining agent on the top part after pouring the molten metal, or by placing a heat generating agent again after combustion and further placing a heat retaining agent. Is preventing.
更に最近では、保温剤の代りに、電気的に加熱したり、
或いはガスバーナーによりトップ部を積極的に加熱する
方法なども試みられている。前者の場合、第３図に示す
ように、定盤20の上に鋳型21を載置し、この鋳型内に鋳
込を終了した後、鋳型21の頂部に電極22を配置すると共
に防熱蓋23を被せ、電極22と鋳型内の未凝固溶湯の間に
アークを発生させてトップ部を加熱するものである。な
お、トップ部の収縮に伴い電極22の上下位置を調整する
ために検出系24、制御系25、サーボモータ26が設けられ
ている。27は漏洩変圧器である。More recently, instead of heat insulation, it can be electrically heated,
Alternatively, a method of actively heating the top portion with a gas burner has been attempted. In the former case, as shown in FIG. 3, the mold 21 is placed on the surface plate 20, and after the casting is finished in this mold, the electrode 22 is arranged on the top of the mold 21 and the heat insulating cover 23 Then, an arc is generated between the electrode 22 and the unsolidified molten metal in the mold to heat the top portion. A detection system 24, a control system 25, and a servomotor 26 are provided to adjust the vertical position of the electrode 22 as the top portion contracts. 27 is a leakage transformer.
一方、連続鋳造においては、連鋳片トップ部の保温につ
いては格別の考慮は払われておらず、鋳片のトップ部
は、鋳造終了後、フラックス、スラグ等を全部取り去
り、鋳型を通過させた後、二次冷却水で急冷するように
している。On the other hand, in continuous casting, no particular consideration was given to the heat retention of the continuous cast slab top part, and the top part of the slab was removed from the flux, slag, etc. after completion of casting, and passed through the mold. After that, it is designed to be rapidly cooled with secondary cooling water.
すなわち、第４図に示すように、タンディシュ１からス
トッパー３を調整して鋳型４内に鋳込まれた連鋳鋳片５
は、ダミーバー７の引抜きにより下方に取り打される
が、鋳込終了後は、連鋳鋳片５のトップ部は、フラック
ス、スラグ等が取り出された後に、ダミーバー巻上装置
８によって下方に移動されて鋳型４を通過し、この段階
で二次冷却装置６によって二次冷却水をトップ部にか
け、急冷される。That is, as shown in FIG. 4, the continuous cast slab 5 which is cast into the mold 4 by adjusting the stopper 3 from the tundish 1 is used.
Is drawn downward by pulling out the dummy bar 7, but after the casting is completed, the top part of the continuous cast slab 5 is moved downward by the dummy bar hoisting device 8 after the flux, slag and the like are taken out. After passing through the mold 4, the secondary cooling device 6 puts the secondary cooling water on the top portion of the mold 4 to quench it.
（発明が解決しようとする問題点） しかし乍ら、このような連鋳片トップ部の処理方法で
は、トップ部の収縮面は鋭い三角形となり、深さが1.5m
近くにまで及び、スクラップにせざるを得ないことにな
る。大断面連鋳片の半連続鋳造の場合には、極端に歩留
りが悪くなるため、特に小容量で大断面鋳片の場合に
は、連鋳化がなされていないのが実情である。(Problems to be solved by the invention) However, according to such a method for treating the top portion of the continuous cast piece, the contraction surface of the top portion becomes a sharp triangle and the depth is 1.5 m.
It will reach the vicinity and will have to be scrapped. In the case of semi-continuous casting of a large-section continuous cast slab, the yield becomes extremely poor. Therefore, in the case of a small-capacity large-section continuous slab, continuous casting has not been performed.
本発明の目的は、上記従来技術の欠点を解消し、連鋳片
のトップ部の歩留りを向上させることができ、特に小容
量で大断面鋳片の連鋳化を可能にする半連続鋳造方法を
提供することにある。The object of the present invention is to solve the above-mentioned drawbacks of the prior art, improve the yield of the top portion of the continuous cast piece, and particularly a semi-continuous casting method that enables continuous casting of a large-section cast piece with a small volume. To provide.
（問題点を解決するための手段） 上記目的を達成するため、本発明は、連続鋳造の鋳込終
了後、連鋳片のトップ部が鋳型を通過した後に該連鋳片
のトップ部を保温又は加熱することを特徴とする半連続
鋳造方法を要旨とするものである。(Means for Solving Problems) In order to achieve the above object, the present invention, after the casting of the continuous casting is completed, the top portion of the continuous cast piece is kept warm after passing through the mold. Alternatively, the gist is a semi-continuous casting method characterized by heating.
以下に、本発明を実施例に基づいて詳細に説明する。Hereinafter, the present invention will be described in detail based on examples.
（実施例） 第１図及び第２図は、本発明の実施に用いる連続鋳造装
置の一例及び作業手順を示す概略図である。１はタンデ
ィシュで、タンディシュカー２に載置されて横方向に退
避可能となっている。このタンディシュ１には、注湯口
を開閉調整するストッパ３が設けられている。４は鋳型
であり、その下方には連鋳片５を側方から冷却する二次
冷却装置６が設けられている。７はダミーバーで、ダミ
ーバー巻上装置８により昇降可能とされている。９はロ
ーラガイドであるが、鋳造速度を低速とし、シェル厚さ
Ｄ（Ｄ＝ｋ√ｔ＋Ｃ、但し、k:凝固係数、t:時間、C:定
数）を充分に形成させれば、省略することができる。(Embodiment) FIG. 1 and FIG. 2 are schematic views showing an example of a continuous casting apparatus used for carrying out the present invention and a work procedure. Reference numeral 1 is a tundish, which is placed on a tundish car 2 and can be retracted laterally. The tundish 1 is provided with a stopper 3 for adjusting the opening / closing of the pouring port. Reference numeral 4 denotes a mold, and a secondary cooling device 6 for cooling the continuous cast piece 5 from the side is provided below the mold. Reference numeral 7 denotes a dummy bar, which can be moved up and down by a dummy bar hoisting device 8. Reference numeral 9 is a roller guide, but it is omitted if the casting speed is low and the shell thickness D (D = k√t + C, k: solidification coefficient, t: time, C: constant) is sufficiently formed. be able to.
タンディシュ１の退避方向と逆方向にはバーナー加熱装
置10が待機されており、バーナー加熱装置10は、台車11
上に載置されて横方向に移動可能に構成されていると共
にその中央部にバーナー12が上下動可能に備えつけられ
ている。The burner heating device 10 is on standby in the direction opposite to the evacuation direction of the tundish 1, and the burner heating device 10 includes the carriage 11
A burner 12 is mounted on the top of the burner 12 so as to be movable in the lateral direction, and a burner 12 is provided at the center of the burner 12 so as to be vertically movable.
上記装置において、鋳造時には、第１図に示すように、
タンディシュ１のストッパ２を開けて、ダミーバー７で
底部をふさがれた状態の鋳型４内に注湯し、鋳型４をオ
シュレーションさせながらダミーバー７を引き下げ、連
鋳片５を鋳型４の下方に取り出す。その際、鋳型直下の
連鋳片５の部分は、その側部を二次冷却装置６により二
次冷却されると共に、ローラガイド９により連続的に引
き下げられる。In the above apparatus, when casting, as shown in FIG.
Open the stopper 2 of the tundish 1, pour the molten metal into the mold 4 whose bottom is blocked by the dummy bar 7, pull down the dummy bar 7 while oscillating the mold 4, and take out the continuous cast piece 5 below the mold 4. . At that time, the part of the continuous cast piece 5 immediately below the mold is secondarily cooled by the secondary cooling device 6 and continuously pulled down by the roller guide 9.
鋳込が終了すると、連鋳片５を引続き引き下げてそのト
ップ部が鋳型４を通過させると共に二次冷却を停止し、
また第２図に示すように、タンディシュカー２を作動さ
せてタンディシュ１を鋳型４の上方位置から横方向に移
動させ、それと同時に、加熱装置用の台車11を作動させ
てバーナー加熱装置10を鋳型４の上方位置に位置決め停
止させる。次いで、バーナー12を下降させ、連鋳片５の
トップ部を加熱する。その後、連鋳片５のボトム部の凝
固が完了した時点で、バーナー12を上昇させると共に、
連鋳片５を引抜き、連鋳作業を完了する。When the casting is completed, the continuous cast piece 5 is continuously pulled down so that the top portion thereof passes the mold 4 and the secondary cooling is stopped,
Further, as shown in FIG. 2, the tundish car 2 is operated to move the tundish 1 laterally from the position above the mold 4, and at the same time, the trolley 11 for the heating device is operated to operate the burner heating device 10. Positioning is stopped at a position above the mold 4. Then, the burner 12 is lowered to heat the top portion of the continuous cast piece 5. Then, when solidification of the bottom portion of the continuous cast piece 5 is completed, the burner 12 is raised and
The continuous cast piece 5 is pulled out, and the continuous casting work is completed.
なお、変形例として、バーナー12の代わりにアーク加熱
用の電極を設けても良い。また鋳型４全体を取外し、適
宜構成の保温装置（図示せず）をキャップとして連鋳片
のトップ部にかぶせる方式や、鋳型４全体を取外し、高
周波加熱装置を鋳型部分に取付けて連鋳片５のトップ部
を加熱する方式を採用してもよく、同様の効果が得られ
る。As a modification, an electrode for arc heating may be provided instead of the burner 12. In addition, the mold 4 as a whole is removed and a heat retaining device (not shown) having an appropriate configuration is used as a cap to cover the top of the continuous cast piece, or the entire mold 4 is removed and a high-frequency heating device is attached to the mold portion to form the continuous cast piece 5. A method of heating the top portion of the above may be adopted, and the same effect can be obtained.
（発明の効果） 以上詳述したように、本発明によれば、連鋳片のトップ
部を鋳造後直ちに保温又は積極的に加熱するようにした
ので、トップ部の収縮面を可及的に減少することがで
き、したがって、連鋳片の歩留りを大幅に向上すること
ができる。特に小容量で大断面鋳片の連続鋳造に好適で
ある。(Effects of the Invention) As described in detail above, according to the present invention, the top portion of the continuous cast piece is kept warm or positively heated immediately after casting, so that the contracted surface of the top portion is minimized. Therefore, the yield of continuous cast pieces can be significantly improved. It is particularly suitable for continuous casting of small-capacity, large-section slabs.
第１図及び第２図は本発明法の実施に用いる連続鋳造装
置の一例を示す図であって、第１図は鋳造の中の状態、
第２図はトップ部加熱中の状態を示図であり、 第３図は普通造塊法における鋼塊のアーク加熱装置を示
す図であり、 第４図は従来法による連鋳片のトップ部の処理状況を示
す図である。 １……タンディシュ、２……タンディシュカー、 ３……ストッパ、４……鋳型、 ５……連鋳片、６……二次冷却装置、 ７……ダミーバー、８……ダミーバー巻上装置、 ９……ローラガイド、10……バーナー加熱装置、 11……台車、12……バーナー。1 and 2 are views showing an example of a continuous casting apparatus used for carrying out the method of the present invention, and FIG. 1 is a state during casting,
FIG. 2 is a diagram showing a state during heating of the top portion, FIG. 3 is a diagram showing an arc heating device for a steel ingot in the normal ingot making method, and FIG. 4 is a top portion of a continuous cast piece by the conventional method. It is a figure which shows the processing situation of. 1 ... Tundish, 2 ... Tandish car, 3 ... Stopper, 4 ... Mold, 5 ... Continuous cast piece, 6 ... Secondary cooling device, 7 ... Dummy bar, 8 ... Dummy bar hoisting device, 9 …… Roller guide, 10 …… Burner heating device, 11 …… Bogie, 12 …… Burner.
Claims (1)
が鋳型を通過した後に該連鋳片のトップ部を保温又は加
熱することを特徴とする半連続鋳造方法。1. A semi-continuous casting method characterized in that after the casting of the continuous casting is completed, the top portion of the continuous casting piece passes through the mold and then the top portion of the continuous casting piece is kept warm or heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037099A JPH0667541B2 (en) | 1986-02-21 | 1986-02-21 | Semi-continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037099A JPH0667541B2 (en) | 1986-02-21 | 1986-02-21 | Semi-continuous casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62197250A JPS62197250A (en) | 1987-08-31 |
| JPH0667541B2 true JPH0667541B2 (en) | 1994-08-31 |
Family
ID=12488134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61037099A Expired - Fee Related JPH0667541B2 (en) | 1986-02-21 | 1986-02-21 | Semi-continuous casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0667541B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1262260B1 (en) * | 2001-05-31 | 2005-07-27 | Daido Tokushuko Kabushiki Kaisha | Method and apparatus for vertical casting of ingots and ingot thus obtained |
| JP4613448B2 (en) * | 2001-06-01 | 2011-01-19 | 大同特殊鋼株式会社 | Vertical casting method and apparatus |
| AT15223U1 (en) | 2014-03-27 | 2017-03-15 | Primetals Technologies Austria GmbH | Semi-continuous casting of a steel strand |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725253A (en) * | 1980-07-18 | 1982-02-10 | Kobe Steel Ltd | Semicontinuous casting method for metal |
-
1986
- 1986-02-21 JP JP61037099A patent/JPH0667541B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62197250A (en) | 1987-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |