JPH09108783A - Mold for continuous casting equipment - Google Patents
Mold for continuous casting equipmentInfo
- Publication number
- JPH09108783A JPH09108783A JP26392595A JP26392595A JPH09108783A JP H09108783 A JPH09108783 A JP H09108783A JP 26392595 A JP26392595 A JP 26392595A JP 26392595 A JP26392595 A JP 26392595A JP H09108783 A JPH09108783 A JP H09108783A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- continuous casting
- taper
- casting equipment
- slab
- 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
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は金属、特に鋼の連続
鋳造設備用モールドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for continuous casting equipment for metals, particularly steel.
【０００２】[0002]
【従来の技術】従来の連続鋳造設備用モールドについ
て、図２〜図４に基づき説明する。2. Description of the Related Art A conventional mold for continuous casting equipment will be described with reference to FIGS.
【０００３】図２は、一般的な連続鋳造設備に従来のモ
ールドを配置した状態を示す説明図である。同図に示す
ように、モールド２１内へ溶鋼ノズル１０から溶鋼が注
入されると、モールド２１の外側に多数配置されたスプ
レーノズル３から冷却水が噴射されてモールド２１が冷
却される。そして、モールド２１内の溶鋼が次第に下方
へ移動しながら周辺部が凝固されて、鋳片２が連続的に
鋳造される。なお、前記冷却水は、冷却水入口４から図
示しないポンプ等によって供給され、ジャケット６から
モールド２１周辺を流水によって冷却したり、上記の如
くスプレーノズル３から噴射されてモールド２１を冷却
した後、冷却水出口５から排出される。また、モールド
２１は断面が正方形状の筒状であって、モールド上部の
溶鋼入口から下部の鋳片出口まで直線のテーパ（傾斜）
が付与されており、そのテーパ値は１％／ｍ以下で、
０．６〜０．８％／ｍが一般的に採用されている。FIG. 2 is an explanatory view showing a state in which a conventional mold is arranged in a general continuous casting facility. As shown in the figure, when molten steel is injected into the mold 21 from the molten steel nozzle 10, a large number of spray nozzles 3 arranged outside the mold 21 spray cooling water to cool the mold 21. Then, the molten steel in the mold 21 gradually moves downward, the peripheral portion is solidified, and the slab 2 is continuously cast. The cooling water is supplied from the cooling water inlet 4 by a pump or the like (not shown) to cool the periphery of the mold 21 from the jacket 6 with running water, or is sprayed from the spray nozzle 3 to cool the mold 21 as described above. It is discharged from the cooling water outlet 5. Also, the mold 21 has a tubular shape with a square cross section, and has a linear taper (inclination) from the molten steel inlet at the upper part of the mold to the outlet of the ingot at the lower part.
Is given, and the taper value is 1% / m or less,
0.6 to 0.8% / m is generally adopted.
【０００４】図３（ａ）は他の従来の連続鋳造設備用モ
ールドの平面図、図３（ｂ）は図３（ａ）のIII −III
線矢視断面図、図３（ｃ）は図３（ａ）に示すモールド
内の鋳片の状態図である。これらの図に示すモールドは
先に特開平４−３１９０４４号公報にて開示されたもの
であり、モールド周辺の構造は図２とほぼ同様である。
図３に示すように、モールド３１は、モールド上部の溶
鋼入口側から下部の鋳片出口側までの間にテーパ値の異
なる上半部３１ａと下半部３１ｂとで構成されており、
図３（ａ）に示す辺中央の張出し部の寸法Ｔが、図３
（ｂ）に示す寸法Ｔとなっている。張出し部のテーパは
１０〜３５％／ｍで、両端部のテーパは０〜１％／ｍで
ある。FIG. 3 (a) is a plan view of another conventional mold for continuous casting equipment, and FIG. 3 (b) is III-III of FIG. 3 (a).
FIG. 3 (c) is a state view of the cast piece in the mold shown in FIG. 3 (a). The mold shown in these figures was previously disclosed in JP-A-4-319044, and the structure around the mold is almost the same as in FIG.
As shown in FIG. 3, the mold 31 is composed of an upper half part 31a and a lower half part 31b having different taper values from the molten steel inlet side of the upper part of the mold to the lower slab outlet side of the mold,
The dimension T of the overhang portion at the center of the side shown in FIG.
It has a dimension T shown in (b). The taper of the overhang portion is 10 to 35% / m, and the taper of both end portions is 0 to 1% / m.
【０００５】このようなモールド３１では、鋳片の鋳造
速度が低速になった場合には、図３（ｃ）に示すように
モールド３１の上半部３１ａと下半部３１ｂとの間で鋳
片２の周辺部の冷却が進んで凝固殻ができることによ
り、鋳片２が変形せず、この部分が抵抗となって下方へ
の移動が不可能になる。In such a mold 31, when the casting speed of the slab becomes low, the casting is performed between the upper half portion 31a and the lower half portion 31b of the mold 31 as shown in FIG. 3 (c). Since the cooling of the peripheral portion of the piece 2 progresses and solidified shells are formed, the cast piece 2 is not deformed, and this portion becomes a resistance and cannot move downward.
【０００６】図４（ａ）は更に他の従来の連続鋳造設備
用モールドの縦断面図、図４（ｂ）は図４（ａ）のIV−
IV線矢視断面図、図４（ｃ）は図４（ａ）に示すモール
ド内の鋳片の状態図である。これらの図に示すモールド
は先に特公昭５３−００９３０号公報にて開示されたも
のである。図４（ａ）に示すように、モールド４１は、
最初の冷却段４１ａの間接冷却と最後の冷却段４１ｃの
冷却板との間に、中間冷却段４１ｂとして冷却水を直接
スプレーするスプレーノズル３ａが設けられており、図
４（ｂ）に示すようにスプレーノズル３ａからモールド
４１のコーナー部に冷却水を噴射している。そして、各
冷却段は溶鋼の凝固に合わせて微小なテーパが設けられ
ている。FIG. 4 (a) is a vertical sectional view of still another conventional mold for continuous casting equipment, and FIG. 4 (b) is a sectional view taken along line IV- of FIG. 4 (a).
A cross-sectional view taken along the line IV, FIG. 4C is a state view of the cast piece in the mold shown in FIG. The mold shown in these figures was previously disclosed in Japanese Patent Publication No. 53-09930. As shown in FIG. 4A, the mold 41 is
A spray nozzle 3a for directly spraying cooling water is provided as an intermediate cooling stage 41b between the indirect cooling of the first cooling stage 41a and the cooling plate of the last cooling stage 41c, as shown in FIG. 4 (b). Further, the cooling water is sprayed from the spray nozzle 3a to the corner portion of the mold 41. Then, each cooling stage is provided with a minute taper according to the solidification of the molten steel.
【０００７】このようなモールド４１では、ブレークア
ウト時には、図４（ｃ）に示すように中間冷却段４１ｂ
から溶鋼が溢れ出て冷却板を覆う状態が発生し、冷却板
を破損してしまう。In such a mold 41, at the time of breakout, as shown in FIG. 4C, the intermediate cooling stage 41b.
Molten steel overflows from this and a state occurs in which it covers the cooling plate, and the cooling plate is damaged.
【０００８】[0008]
【発明が解決しようとする課題】上記のように、従来の
連続鋳造設備用モールドでは、モールドにテーパを設定
し、冷却手段を配置し、冷却速度を適宜に組み合わせた
運転を行っているが、次のような問題点があった。As described above, in the conventional mold for continuous casting equipment, the taper is set in the mold, the cooling means is arranged, and the operation is performed by appropriately combining the cooling rates. There were the following problems.
【０００９】図２に示す連続鋳造設備のモールド２１
では、コーナー部近傍にモールド２１と鋳片２との間で
エアギャップが生じ、また鋳片コーナー部より１０数mm
の位置で凝固遅れ部が生じて、鋳片２の変形及びブレー
クアウトの原因となっていた。The mold 21 of the continuous casting equipment shown in FIG.
Then, an air gap occurs between the mold 21 and the slab 2 in the vicinity of the corner, and it is more than 10 mm from the corner of the slab.
At this position, a solidification delay portion was generated, which caused deformation and breakout of the slab 2.
【００１０】図３に示す連続鋳造設備のモールド３１
では、張出し部のテーパが大きく鋳片２を内側に押し込
むため、図２に示すモールド２１に比べて、モールド３
１と鋳片２との間でのエアギャップ量は少ないが、モー
ルド内面の磨耗が多く、また鋳造速度が遅い場合には、
鋳片２の周辺が凝固するため、テーパの大きい上半部３
１ａからテーパの微小な下半部３１ｂへの下方移動時の
抵抗が大きすぎて鋳造ができなくなるという問題があっ
た。Mold 31 of the continuous casting equipment shown in FIG.
Since the overhanging portion has a large taper, the cast piece 2 is pushed inward, so that the mold 3 is larger than the mold 21 shown in FIG.
Although the amount of air gap between 1 and the cast piece 2 is small, when the inner surface of the mold is abraded and the casting speed is slow,
Since the periphery of the slab 2 solidifies, the upper half 3 with a large taper
There was a problem that the resistance during the downward movement from 1a to the lower half 31b having a slight taper was too large to make casting impossible.
【００１１】図４に示す連続鋳造設備のモールド４１
では、定常運転時には問題ないが、ブレークアウトが生
じた場合には、モールド直下の冷却板が溶鋼をかぶるた
め、復旧に多大な時間を要し、最悪の場合には冷却板を
廃却することがあった。Mold 41 of the continuous casting equipment shown in FIG.
In normal operation, there is no problem, but when a breakout occurs, the cooling plate directly below the mold covers the molten steel, so it takes a long time to restore, and in the worst case, the cooling plate should be discarded. was there.
【００１２】また、上記エアギャップが発生すると、モ
ールド（鋳型）と鋳片（凝固殻）との間の熱伝達を著し
く低下させて鋳片の冷却が不均一となり、これが鋳片の
変形、クラック、組織不良等の原因になっていた。Further, when the air gap is generated, heat transfer between the mold (mold) and the slab (solidified shell) is remarkably reduced and cooling of the slab becomes uneven, which causes deformation and cracks of the slab. It was a cause of poor organization.
【００１３】従って本発明は上記従来技術に鑑み、鋳片
を効率よく均一に冷却することができる連続鋳造設備用
モールドを提供することを課題とする。Therefore, in view of the above-mentioned prior art, it is an object of the present invention to provide a mold for continuous casting equipment capable of efficiently and uniformly cooling a cast piece.
【００１４】[0014]
【課題を解決するための手段】上記課題を解決する本発
明の連続鋳造設備用モールドは、上部の溶融金属入口側
と下部の鋳片出口側との間にテーパ部を有する筒状多角
形の連続鋳造設備用モールドであって、モールドの外部
からスプレーノズルによる噴射又は流水によってモール
ド外壁を冷却する冷却手段を設け、モールドの中央部か
ら下部にかけて筒状多角形のコーナー部に切り欠き部を
形成し、これらの切り欠き部に直接冷却水を噴射するス
プレーノズルを配設すると共に非切り欠き部をモールド
の内側方向に押圧する押圧手段を設けたことを特徴とす
る。A mold for continuous casting equipment according to the present invention which solves the above-mentioned problems has a cylindrical polygonal shape having a tapered portion between an upper molten metal inlet side and a lower cast piece outlet side. A mold for continuous casting equipment, provided with cooling means to cool the outer wall of the mold from the outside of the mold by spraying with a spray nozzle or running water, and forming notches in the corners of the cylindrical polygon from the center to the bottom of the mold The spray nozzles for directly injecting the cooling water are arranged in the cutouts, and the pressing means for pressing the non-cutouts inward of the mold are provided.
【００１５】また、前記切り欠き部が、モールドの高さ
方向の３０％以下の領域に１０〜３０mmの幅で形成され
ていることを特徴とする。Further, the notch portion is formed with a width of 10 to 30 mm in a region of 30% or less in the height direction of the mold.
【００１６】また、前記テーパ部が、前記切り欠き部よ
り上方の領域では５％／ｍ〜０．１％／ｍのテーパ値で
２段階以上の折れ線又はそれに近似した線を有するテー
パ部からなることを特徴とする。In the region above the cutout portion, the tapered portion is a tapered portion having a polygonal line of two steps or more or a line approximate to it with a taper value of 5% / m to 0.1% / m. It is characterized by
【００１７】従って本発明の連続鋳造設備用モールドに
よれば、モールド上部に設けられた溶融金属入口から溶
融金属が注入されると、この溶融金属はモールドのテー
パに沿って下方の鋳片出口へ移動して行くが、このとき
モールド外部から、スプレーノズルからの冷却水の噴射
によって又は流水によってモールドを冷却する。またモ
ールドの中央部から下部にかけてコーナー部に形成され
た切り欠き部へもスプレーノズルから冷却水を噴射し鋳
片を直接冷却してコーナー部の冷却を早める。そして、
非切り欠き部を押圧手段によってモールドの内側方向へ
溶融金属静圧と同程度の押圧力で押圧し、鋳片を内側へ
変形させることなく前記スプレーノズルからの冷却水の
噴射によって冷却する。即ち、モールドと鋳片との間の
エアギャップ量を減少させて平均熱流量を上昇させ、ま
た鋳片コーナー部近傍の凝固遅れを小さくする。このた
め、溶融金属入口から注入された溶融金属の外周部に均
一な厚さの凝固殻ができて鋳片が鋳片出口から取り出さ
れる。Therefore, according to the mold for continuous casting equipment of the present invention, when the molten metal is injected from the molten metal inlet provided in the upper part of the mold, the molten metal is guided to the lower slab outlet along the taper of the mold. While moving, the mold is cooled from the outside of the mold at this time by jetting cooling water from a spray nozzle or by running water. Further, cooling water is sprayed from the spray nozzle to the notch formed in the corner from the center to the bottom of the mold to directly cool the slab and accelerate the cooling of the corner. And
The non-notched portion is pressed by the pressing means toward the inside of the mold with a pressing force approximately the same as the static pressure of the molten metal, and the slab is cooled by injecting cooling water from the spray nozzle without deforming the slab inward. That is, the amount of air gap between the mold and the cast piece is reduced to increase the average heat flow rate, and the solidification delay near the corner portion of the cast piece is reduced. Therefore, a solidified shell having a uniform thickness is formed on the outer peripheral portion of the molten metal injected from the molten metal inlet, and the slab is taken out from the slab outlet.
【００１８】また、モールドの切り欠き部を、実験によ
り求められた適正位置に適正な切り欠き幅で形成（モー
ルドの高さ方向の３０％以下の領域に１０〜３０mmの幅
で形成）することにより、前記コーナー部の冷却が一層
効果的に行われる。Further, the notch portion of the mold is formed with an appropriate notch width at an appropriate position obtained by an experiment (formed with a width of 10 to 30 mm in an area of 30% or less in the height direction of the mold). As a result, the corner portion is cooled more effectively.
【００１９】また、モールドのテーパ部を、切り欠き部
より上方の領域では５％／ｍ〜０．１％／ｍのテーパ値
で２段階以上の折れ線又はそれに近似した線を有するテ
ーパ部から構成することにより、溶融金属入口から注入
された溶融金属がモールドのテーパに沿って下方の鋳片
出口へスムーズに移動しながら冷却されて鋳片が鋳造さ
れる。Further, the taper portion of the mold is constituted by a taper portion having a polygonal line of two steps or more or a line close thereto with a taper value of 5% / m to 0.1% / m in a region above the cutout portion. By doing so, the molten metal injected from the molten metal inlet is cooled while smoothly moving to the lower slab outlet along the taper of the mold, and the slab is cast.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき詳細に説明する。なお図２と同一部分には同一
の符号を付し重複する説明は省略する。Embodiments of the present invention will be described below in detail with reference to the drawings. The same parts as those in FIG. 2 are designated by the same reference numerals, and the duplicated description will be omitted.
【００２１】〈構成〉図１（ａ）は連続鋳造設備に本発
明の実施例に係るモールドを配置した状態を示す説明
図、図１（ｂ）は図１（ａ）のＩ−Ｉ線矢視図である。<Structure> FIG. 1 (a) is an explanatory view showing a state in which a mold according to an embodiment of the present invention is arranged in a continuous casting facility, and FIG. 1 (b) is an arrow I-I of FIG. 1 (a). It is a perspective view.
【００２２】図１（ａ）に示すように、モールド１は、
断面が正方形状の筒状であって、モールド上部の溶鋼入
口側と下部の鋳片出口側との間にテーパ部を有し、この
テーパ部が、テーパ値の異なる上部テーパ部１ａ、中間
部テーパ部１ｂ、下部テーパ部１ｃの３段階で構成され
ている。そして、下部テーパ部１ｃには切り欠き部（切
り欠き空間）８が形成されている。これらの切り欠き部
８は、図１（ｂ）に示すように下部テーパ部１ｃの各コ
ーナー部に１０〜３０mmの幅で形成されている。As shown in FIG. 1 (a), the mold 1 is
It has a square cross-section, and has a taper portion between the molten steel inlet side of the upper part of the mold and the cast piece outlet side of the lower part, and the taper part has an upper taper part 1a and an intermediate part having different taper values. The taper portion 1b and the lower taper portion 1c have three stages. A cutout portion (cutout space) 8 is formed in the lower tapered portion 1c. As shown in FIG. 1 (b), these notches 8 are formed in the corners of the lower tapered portion 1c with a width of 10 to 30 mm.
【００２３】また下部テーパ部１ｃの非切り欠き部８ａ
の外側にはモールド押圧棒７が設けられており、これら
のモールド押圧棒７は押圧手段７に各々結合されてい
る。押圧手段７は、各モールド押圧棒７に対し、バネ又
は油圧等によってモールド１の内側方向へ溶鋼静圧と同
程度の押圧力を付与する。従ってモールド押圧棒７は、
非切り欠き部８ａを溶鋼静圧と同程度の押圧力でモール
ド１の内側方向へ押圧する。The non-cutout portion 8a of the lower taper portion 1c
Mold pressing rods 7 are provided on the outer side of, and these mold pressing rods 7 are respectively coupled to the pressing means 7. The pressing means 7 applies a pressing force to each mold pressing rod 7 in the inward direction of the mold 1 by a spring, hydraulic pressure, or the like, which is approximately the same as the molten steel static pressure. Therefore, the mold pressing rod 7
The non-notched portion 8a is pressed inward of the mold 1 with a pressing force that is approximately the same as the molten steel static pressure.
【００２４】なお上記モールド１の断面は正方形状であ
るが、これ以外に、他の四角形、六角形、八角形などの
多角形で構成してもよい。Although the mold 1 has a square cross section, other shapes such as quadrangle, hexagon, octagon and the like may be used.
【００２５】〈作用・効果〉モールド１の上部に設けら
れた溶鋼入口の溶鋼ノズル１０から溶鋼がモールド１内
へ注入されると、この溶鋼はモールド１のテーパに沿っ
て下方の鋳片出口方向へ移動して行くが、このときモー
ルド１の外側に多数配置されたスプレーノズル３から冷
却水を噴射してモールド１の外壁を冷却し、又はジャケ
ット６からモールド１の外壁を流水によって直接冷却す
る。<Operation / Effect> When the molten steel is injected into the mold 1 from the molten steel nozzle 10 at the molten steel inlet provided on the upper part of the mold 1, the molten steel is directed downward along the taper of the mold 1 toward the outlet of the slab. The outer wall of the mold 1 is cooled by spraying cooling water from the spray nozzles 3 arranged on the outside of the mold 1 at this time, or the outer wall of the mold 1 is directly cooled from the jacket 6 by running water. .
【００２６】また、モールド１の下部テーパ部１ｃに形
成された切り欠き部８へもスプレーノズル３から冷却水
を噴射し、これによって鋳片２のコーナー部を直接冷却
してコーナー部の冷却を早める。なお、この冷却水も冷
却水入口４から図示しないポンプ等によって供給され、
モールド１を冷却後に冷却水出口５から排出される。そ
して、モールド１の下部テーパ部１ｃの非切り欠き部８
ａは、押圧手段９によりモールド押圧棒７を介してモー
ルド１の内側方向へ溶鋼静圧と同程度の押圧力で押圧さ
れるので、鋳片２を内側へ変形させることがない。即
ち、モールド１と鋳片２との間のエアギャップを減少さ
せて平均熱流速を上昇させ、また鋳片２のコーナー部近
傍の凝固遅れを小さくする。Cooling water is also sprayed from the spray nozzle 3 to the notch 8 formed in the lower taper portion 1c of the mold 1, whereby the corner portion of the slab 2 is directly cooled to cool the corner portion. Speed up. This cooling water is also supplied from the cooling water inlet 4 by a pump not shown,
After cooling the mold 1, it is discharged from the cooling water outlet 5. Then, the non-cutout portion 8 of the lower taper portion 1c of the mold 1
Since a is pressed by the pressing means 9 through the mold pressing rod 7 toward the inner side of the mold 1 with a pressing force almost equal to the molten steel static pressure, the cast piece 2 is not deformed inward. That is, the air gap between the mold 1 and the cast piece 2 is reduced to increase the average heat flow rate, and the solidification delay near the corner of the cast piece 2 is reduced.
【００２７】かくして、モールド１内の溶鋼が次第に下
方へ移動しながら周辺部が凝固されて均一な厚さの凝固
殻ができ、鋳片２が鋳片出口から連続的に鋳造されて取
り出される。Thus, while the molten steel in the mold 1 gradually moves downward, the peripheral portion is solidified to form a solidified shell having a uniform thickness, and the slab 2 is continuously cast and taken out from the slab outlet.
【００２８】以上の通り本発明の実施例に係る連続鋳造
設備のモールド１によれば、モールド１と鋳片２との間
のエアギャップ量が減少して平均熱流束が上昇するの
で、高速鋳造が可能となって、連続鋳造設備の生産性が
大幅に向上する。As described above, according to the mold 1 of the continuous casting equipment according to the embodiment of the present invention, the air gap amount between the mold 1 and the cast piece 2 is decreased and the average heat flux is increased, so that the high speed casting is performed. This makes it possible to significantly improve the productivity of continuous casting equipment.
【００２９】また鋳片２のコーナー部近傍の凝固遅れが
小さくなって凝固シェル均一度が高くなるので、鋳片２
の変形量が減少し、ブレークアウトが発生し難くなる。Further, since the solidification delay in the vicinity of the corners of the slab 2 becomes small and the uniformity of the solidified shell becomes high, the slab 2
The amount of deformation of is reduced, and breakout is less likely to occur.
【００３０】〈実験例〉次に実験例を示す。なおモール
ドの寸法等の条件は下記の通りである。 モールド； 純銅製（高さ８００mm×肉厚１０mm） 上部溶鋼入口側サイズ（１５５mm×１５５mm） テーパ値； 上部テーパ部１ａ （上端０〜２００mm） →５％／ｍ、 中間部テーパ部１ｂ（２００〜３００mm） →１％／ｍ、 下部テーパ部１ｃ （３００〜下端８００mm）→０．１％／ｍ、 切り欠き部；下部テーパ部１ｃの（５００〜下端８００mm）領域×幅２０mm 鋳片； 炭素鋼 鋳込温度； １５５０℃ 鋳造速度； ３．０〜３．５ｍ／ｍｉｎ<Experimental Example> Next, an experimental example will be described. The conditions such as the dimensions of the mold are as follows. Mold; Made of pure copper (height 800 mm x wall thickness 10 mm) Upper molten steel inlet side size (155 mm x 155 mm) Taper value; Upper taper part 1a (upper end 0-200 mm) → 5% / m, intermediate part taper part 1b (200- 300 mm) → 1% / m, lower tapered portion 1c (300 to 800 mm at the lower end) → 0.1% / m, notch portion; (500 to 800 mm lower end) region of the lower tapered portion 1c × width 20 mm slab; carbon steel Casting temperature; 1550 ° C Casting speed; 3.0 to 3.5 m / min
【００３１】上記条件での実験結果によると、冷却水入
口４と冷却水出口５の温度差から計算される平均熱流束
は、２４０×１０4 kcal/m2hr であった。これに対し図
２に示す従来のものでは平均熱流束が２００×１０4kca
l/m2hrであり、従来よりも、平均熱流束が増加し本発明
の効果が大きいことが判る。According to the experimental results under the above conditions, the average heat flux calculated from the temperature difference between the cooling water inlet 4 and the cooling water outlet 5 was 240 × 10 4 kcal / m 2 hr. On the other hand, the conventional one shown in FIG. 2 has an average heat flux of 200 × 10 4 kca.
It is 1 / m 2 hr, and it can be seen that the average heat flux is increased and the effect of the present invention is greater than in the conventional case.
【００３２】また、凝固シェル厚さ最小値／凝固シェル
厚さ平均値から求められる凝固シェル均一度は、０．７
７であった。これに対し図２に示す従来のものでは凝固
シェル均一度が０．６０であり、理想値が１．００であ
ることから、従来よりも理想値に近づき本発明の効果が
大きいことが判る。The homogeneity of the solidified shell obtained from the minimum solidified shell thickness / average solidified shell thickness is 0.7.
It was 7. On the other hand, in the conventional one shown in FIG. 2, the solidification shell uniformity is 0.60 and the ideal value is 1.00. Therefore, it can be seen that the effect of the present invention is closer to the ideal value and the effect of the present invention is larger than the conventional one.
【００３３】[0033]
【発明の効果】以上発明の実施の形態と共に具体的に説
明したように本発明によれば、以下の効果が得られる。 モールドの中央部から下部にかけて筒状多角形のコー
ナー部に切り欠き部を形成し、これらの切り欠き部に直
接冷却水を噴射するスプレーノズルを配設すると共に非
切り欠き部をモールドの内側方向に押圧する押圧手段を
設けたことにより、モールドと鋳片との間のエアギャッ
プ量が減少して平均熱流束が上昇するので、高速鋳造が
可能となって連続鋳造設備の生産性が大幅に向上する。
また、鋳片コーナー部近傍の凝固遅れが小さくなって凝
固シェル均一度が高くなるので、鋳片の変形量が減少
し、ブレークアウトが発生し難くなる。 モールドの切り欠き部を、モールドの高さ方向の３０
％以下の領域に１０〜３０mmの幅で形成することによ
り、鋳片コーナー部の冷却が一層効果的に行われ、鋳片
周辺部の凝固進行度が一層均一になる。 モールドのテーパ部を、切り欠き部より上方の領域で
は５％／ｍ〜０．１％／ｍのテーパ値で２段階以上の折
れ線又はそれに近似した線を有するテーパ部から構成す
ることにより、溶融金属（溶鋼等）の凝固速度に合わせ
たモールドのテーパ値となっているので、溶融金属がモ
ールドのテーパに沿って下方の鋳片出口へスムーズに移
動し、モールドと鋳片との間のエアギャップ量が減少
し、鋳片の冷却速度が均一化できる。As described above in detail with the embodiments of the invention, according to the present invention, the following effects can be obtained. Cutouts are formed in the corners of the cylindrical polygon from the center to the bottom of the mold, and spray nozzles for directly injecting cooling water are arranged in these cutouts. By providing the pressing means for pressing, the air gap amount between the mold and the slab decreases and the average heat flux rises, enabling high-speed casting and greatly increasing the productivity of continuous casting equipment. improves.
Further, since the solidification delay in the vicinity of the corner of the slab is reduced and the uniformity of the solidified shell is increased, the amount of deformation of the slab is reduced and breakout is less likely to occur. Cut the notch of the mold by 30 in the height direction of the mold.
%, The slab corner portion is more effectively cooled by forming the slab with a width of 10 to 30 mm, and the degree of solidification in the periphery of the slab becomes more uniform. In the region above the notch, the taper portion of the mold has a taper value of 5% / m to 0.1% / m and is composed of a taper portion having two or more broken lines or a line similar thereto Since the mold taper value matches the solidification rate of the metal (molten steel, etc.), the molten metal moves smoothly along the taper of the mold to the slab outlet below, and the air between the slab and the mold The gap amount can be reduced and the slab cooling rate can be made uniform.
【図１】（ａ）は連続鋳造設備に本発明の実施例に係る
モールドを配置した状態を示す説明図、（ｂ）は（ａ）
のＩ−Ｉ線矢視図である。FIG. 1 (a) is an explanatory view showing a state in which a mold according to an embodiment of the present invention is placed in a continuous casting facility, and FIG. 1 (b) is (a).
FIG. 7 is a view taken along line I-I of FIG.
【図２】一般的な連続鋳造設備に従来のモールドを配置
した状態を示す説明図である。FIG. 2 is an explanatory view showing a state where a conventional mold is arranged in a general continuous casting facility.
【図３】（ａ）は他の従来の連続鋳造設備用モールドの
平面図、（ｂ）は（ａ）のIII−III 線矢視断面図、
（ｃ）は（ａ）に示すモールド内の鋳片の状態図であ
る。3A is a plan view of another conventional mold for continuous casting equipment, FIG. 3B is a sectional view taken along line III-III of FIG.
(C) is a state view of the cast piece in the mold shown in (a).
【図４】（ａ）は更に他の従来の連続鋳造設備用モール
ドの縦断面図、（ｂ）は（ａ）のIV−IV線矢視断面図、
（ｃ）は（ａ）に示すモールド内の鋳片の状態図であ
る。FIG. 4A is a vertical sectional view of still another conventional mold for continuous casting equipment, FIG. 4B is a sectional view taken along the line IV-IV of FIG.
(C) is a state view of the cast piece in the mold shown in (a).
１ モールド １ａ 上部テーパ部 １ｂ 中間部テーパ部 １ｃ 下部テーパ部 ２ 鋳片 ３ スプレーノズル ４ 冷却水入口 ５ 冷却水出口 ６ ジャケット ７ モールド押圧棒 ８ 切り欠き部 ８ａ 非切り欠き部 ９ 押圧手段 １０ 溶鋼ノズル 1 Mold 1a Upper taper part 1b Middle taper part 1c Lower taper part 2 Cast piece 3 Spray nozzle 4 Cooling water inlet 5 Cooling water outlet 6 Jacket 7 Mold pressing rod 8 Notch part 8a Non-notch part 9 Pressing means 10 Molten steel nozzle
Claims (3)
側との間にテーパ部を有する筒状多角形の連続鋳造設備
用モールドであって、 モールドの外部からスプレーノズルによる噴射又は流水
によってモールド外壁を冷却する冷却手段を設け、モー
ルドの中央部から下部にかけて筒状多角形のコーナー部
に切り欠き部を形成し、これらの切り欠き部に直接冷却
水を噴射するスプレーノズルを配設すると共に非切り欠
き部をモールドの内側方向に押圧する押圧手段を設けた
ことを特徴とする連続鋳造設備用モールド。1. A cylindrical polygonal mold for continuous casting equipment having a tapered portion between an upper molten metal inlet side and a lower slab outlet side, which is jetted from a mold by a spray nozzle or flowing water. A cooling means is provided to cool the outer wall of the mold by forming notches at the corners of the cylindrical polygon from the center to the bottom of the mold, and spray nozzles that spray cooling water directly to these notches are provided. In addition, the mold for continuous casting equipment is characterized in that it is provided with pressing means for pressing the non-notched portion inward of the mold.
の３０％以下の領域に１０〜３０mmの幅で形成されてい
ることを特徴とする請求項１記載の連続鋳造設備用モー
ルド。2. The mold for continuous casting equipment according to claim 1, wherein the notch is formed in a region of 30% or less in a height direction of the mold with a width of 10 to 30 mm.
方の領域では５％／ｍ〜０．１％／ｍのテーパ値で２段
階以上の折れ線又はそれに近似した線を有するテーパ部
からなることを特徴とする請求項１又は２記載の連続鋳
造設備用モールド。3. The taper portion is formed of a taper portion having a polygonal line of two or more steps or a line close to it at a taper value of 5% / m to 0.1% / m in a region above the cutout portion. The mold for continuous casting equipment according to claim 1 or 2, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07263925A JP3122352B2 (en) | 1995-10-12 | 1995-10-12 | Mold for continuous casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07263925A JP3122352B2 (en) | 1995-10-12 | 1995-10-12 | Mold for continuous casting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09108783A true JPH09108783A (en) | 1997-04-28 |
| JP3122352B2 JP3122352B2 (en) | 2001-01-09 |
Family
ID=17396177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07263925A Expired - Fee Related JP3122352B2 (en) | 1995-10-12 | 1995-10-12 | Mold for continuous casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3122352B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100633030B1 (en) * | 1997-12-03 | 2006-12-22 | 에스엠에스 데마그 악티엔게젤샤프트 | Funnel-shaped mold for continuous metal casting |
| CN110548839A (en) * | 2019-09-04 | 2019-12-10 | 中冶南方连铸技术工程有限责任公司 | forced cooling crystallizer for slab continuous casting |
| CN113423520A (en) * | 2018-12-12 | 2021-09-21 | 达涅利机械设备股份公司 | Method for obtaining a continuous casting plant and continuous casting plant thus obtained |
| CN113857444A (en) * | 2021-10-10 | 2021-12-31 | 秦皇岛瀚丰长白结晶器有限责任公司 | High-pulling-speed crystallizer suitable for producing plain carbon steel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112170794B (en) * | 2020-09-30 | 2022-03-08 | 江苏华龙铸铁型材有限公司 | Combined type abdomen cooling crystallizer for producing track section bar |
-
1995
- 1995-10-12 JP JP07263925A patent/JP3122352B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100633030B1 (en) * | 1997-12-03 | 2006-12-22 | 에스엠에스 데마그 악티엔게젤샤프트 | Funnel-shaped mold for continuous metal casting |
| CN113423520A (en) * | 2018-12-12 | 2021-09-21 | 达涅利机械设备股份公司 | Method for obtaining a continuous casting plant and continuous casting plant thus obtained |
| CN110548839A (en) * | 2019-09-04 | 2019-12-10 | 中冶南方连铸技术工程有限责任公司 | forced cooling crystallizer for slab continuous casting |
| CN113857444A (en) * | 2021-10-10 | 2021-12-31 | 秦皇岛瀚丰长白结晶器有限责任公司 | High-pulling-speed crystallizer suitable for producing plain carbon steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3122352B2 (en) | 2001-01-09 |
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