JPH0361532B2 - - Google Patents
Info
- Publication number
- JPH0361532B2 JPH0361532B2 JP5891486A JP5891486A JPH0361532B2 JP H0361532 B2 JPH0361532 B2 JP H0361532B2 JP 5891486 A JP5891486 A JP 5891486A JP 5891486 A JP5891486 A JP 5891486A JP H0361532 B2 JPH0361532 B2 JP H0361532B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- slab
- dummy bar
- width
- casting
- 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
Links
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 238000009749 continuous casting Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011819 refractory material 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）
本発明は鋳片幅を変えて鋳込を開始するにあた
り、その都度ダミーバーヘツドを取り替える必要
のない連続鋳造開始方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for starting continuous casting that does not require replacing the dummy bar head each time when starting casting by changing the slab width.
（従来の技術）
従来のスラブ連続鋳造装置およびベルト式薄鋳
片連続鋳造装置においては、鋳型内に注入した溶
湯をシールし、溶湯が凝固し始めた後鋳型内から
鋳片を引き出すためのダミーバーを備えている。
このダミーバーは一般的には鋳造する鋳片寸法に
略等しく、鋳型内寸法より鋳片幅方向に５〜20
mm、鋳片厚み方向には３〜10mm程度狭くなつてお
り、ダミーバーを鋳型内に自由に装入できるよう
になつている。このような寸法のダミーバーは、
鋳込み開始に先立ち鋳型内に装入され、ダミーバ
ーと鋳型との隙間を耐火材もしくは小さな鉄屑等
の冷却材を詰めて鋳型下部をシールした後、溶湯
を注入し、凝固シエルが形成された後、ダミーバ
ーは鋳型下部に設けたピンチロールにより鋳片と
ともに引き出される。(Prior art) In conventional continuous slab casting equipment and belt-type continuous thin slab casting equipment, a dummy bar is used to seal the molten metal poured into the mold and to pull out the slab from the mold after the molten metal begins to solidify. It is equipped with
Generally, this dummy bar is approximately equal to the size of the slab to be cast, and is approximately 5 to 20 mm wide in the slab width direction from the inside dimension of the mold.
mm, and is narrowed by about 3 to 10 mm in the thickness direction of the slab, so that the dummy bar can be freely inserted into the mold. A dummy bar with such dimensions is
Prior to the start of casting, the dummy bar is charged into the mold, the gap between the dummy bar and the mold is filled with refractory material or a coolant such as small iron scraps, and the lower part of the mold is sealed. After that, the molten metal is injected and a solidified shell is formed. The dummy bar is pulled out together with the slab by pinch rolls installed at the bottom of the mold.
ところが、前記の各連続鋳造装置によつて鋳造
される鋳片は、鋼の場合を例にとると、一般的に
は800〜1900mmの範囲内で任意の幅にする必要が
ある。このことから、連続鋳造装置の短辺鋳型は
可動式になつており、任意の幅で鋳込むことがで
きるようになつている。 However, in the case of steel, for example, the slab cast by each of the continuous casting apparatuses described above generally needs to have an arbitrary width within the range of 800 to 1900 mm. For this reason, the short-side mold of the continuous casting device is movable, so that it is possible to cast with any desired width.
しかし、鋳型の下部をシールする機能と鋳片を
引き出す機能を有するダミーバーは、鋳片幅に応
じて自由に変えることが困難であるために二つの
構造に別けてある。即ち、ダミーバーをピンチロ
ール等で移動させる一定寸法の本体部と鋳型内に
装入して鋳型下部をシールする頭部とに別れてお
り、この頭部は本体部に着脱可能になつている。
そして、ダミーバー本体部の幅は、ダミーバーを
鋳型下部より装入する場合には特に制限されない
が、鋳型上部より装入する場合は、通常、鋳造す
る鋳片の最小幅よりも狭くしてある。 However, the dummy bar, which has the function of sealing the lower part of the mold and the function of drawing out the slab, is divided into two structures because it is difficult to freely change it depending on the width of the slab. That is, the dummy bar is divided into a main body of a certain size that is moved by a pinch roll or the like, and a head that is inserted into the mold and seals the lower part of the mold, and the head is detachable from the main body.
The width of the dummy bar main body is not particularly limited when the dummy bar is charged from the bottom of the mold, but when it is charged from the top of the mold, it is usually narrower than the minimum width of the slab to be cast.
一方、特開昭59−185555号公報では、一対の対
向して設けられた循環体と循環体の側縁近傍に配
置した一対の固定側板とで構成する鋳造空間の下
部に底板を設けたダミーバーレス連続鋳造装置が
提案されている。 On the other hand, in Japanese Patent Application Laid-open No. 59-185555, a dummy bar is provided with a bottom plate in the lower part of a casting space consisting of a pair of opposing circulating bodies and a pair of fixed side plates arranged near the side edges of the circulating bodies. A less continuous casting device has been proposed.
（発明が解決しようとする問題点）
しかし、鋳片幅を変えて鋳込みを開始する場
合、鋳型下部をシールするためにはダミーバーの
頭部を鋳片幅に応じた寸法にしなければならな
い。そのために、ダミーバーを一度連続鋳造装置
の外に引出し、鋳片幅に応じた寸法の頭部に取り
替える必要があつた、そのために、通常ダミーバ
ーの脱着に30分以上の時間を要しており、ダミー
バーの抜き差し、ダミーバー頭部の取り替え、鋳
型内にダミーバー頭部を装入してからのシール等
で40〜60分要している。このため、連続鋳造装置
の稼動率が低下して生産性が向上しないという欠
点があり、また鋳片の寸法に応じたダミーバー頭
部を多種類準備しておく必要があるので設備費が
嵩むという問題があつた。(Problems to be Solved by the Invention) However, when starting casting by changing the width of the slab, the head of the dummy bar must be sized according to the width of the slab in order to seal the lower part of the mold. To do this, it was necessary to pull the dummy bar out of the continuous casting equipment and replace it with a head sized according to the width of the slab.As a result, it usually takes more than 30 minutes to attach and detach the dummy bar. It takes 40 to 60 minutes to insert and remove the dummy bar, replace the dummy bar head, and seal after inserting the dummy bar head into the mold. This has the disadvantage that the operating rate of the continuous casting equipment decreases and productivity does not improve.Also, it is necessary to prepare many types of dummy bar heads depending on the dimensions of the slab, which increases equipment costs. There was a problem.
一方、特開昭59−185555号公報に記載された
装置では、ベルトと鋳片との間でスリツプが生
じ、確実に鋳片を引き出すことができない場合が
発生するという問題が生じる。 On the other hand, the device described in Japanese Patent Application Laid-Open No. 59-185555 has a problem in that slips occur between the belt and the slab, and the slab cannot be reliably drawn out.
本発明の目的は、鋳片幅を変更して鋳込を開始
する場合に、その都度ダミーバー頭部を取り替え
ることなく連続鋳造を開始できる方法を提供する
ことにある。 An object of the present invention is to provide a method that allows continuous casting to be started without replacing the dummy bar head each time when starting casting by changing the slab width.
（問題点を解決するための手段）
前述した問題点を解消するために、鋳型内に鋳
造可能な最小鋳片幅以下のダミーバーと鋳型下端
に設けたシール板により鋳型下部をシールした
後、溶湯を注入することを本発明の特徴としてい
る。(Means for solving the problem) In order to solve the above-mentioned problem, after sealing the lower part of the mold with a dummy bar whose width is less than the minimum slab width that can be cast in the mold and a seal plate installed at the lower end of the mold, The present invention is characterized by the injection of
さらに、第１図に基き本発明法を具体的に説明
する。 Furthermore, the method of the present invention will be specifically explained based on FIG.
同図に示した装置はベルト式薄鋳片連続鋳造装
置の場合であるが、鋳型の長辺面となる金属ベル
ト３は駆動ロール５により回転するとともに金属
ベルトの裏面を支持金枠４で保持し、金属ベルト
３と支持金枠４の間に冷却水を流して金属ベルト
を冷却している。一方鋳型の短辺面となる短辺鋳
型６は、図示されていないシリンダーまたは電動
装置により矢印７の方向に移動でき、任意の幅の
鋳片を鋳造できるようになつている。 The device shown in the figure is a belt-type continuous thin slab casting device, in which the metal belt 3 that forms the long side of the mold is rotated by a drive roll 5, and the back side of the metal belt is held by a support frame 4. The metal belt is cooled by flowing cooling water between the metal belt 3 and the support metal frame 4. On the other hand, the short side mold 6, which is the short side of the mold, can be moved in the direction of arrow 7 by a cylinder or electric device (not shown), so that a slab of any width can be cast.
このように構成された鋳型の短辺鋳型を所定の
幅の鋳片を鋳造できる位置に移動させる。この
後、作業性を考慮して鋳造可能な最小鋳片幅より
若干狭いダミーバー８を鋳型内に装入するととも
に短辺鋳型６の下端に設置されたシール板９をシ
リンダー１０等により矢印１１の方向、即ちダミ
ーバーに対して直角方向に移動させ密封した後、
注入ノズル１から鋳型内に溶湯２を注入し、連続
鋳造を開始する。その後凝固シエルが形成された
後、シール板９を退避させて鋳片を引き出す。 The short-side mold of the mold thus configured is moved to a position where a slab of a predetermined width can be cast. After this, in consideration of workability, a dummy bar 8 which is slightly narrower than the minimum castable slab width is inserted into the mold, and a seal plate 9 installed at the lower end of the short-side mold 6 is moved by a cylinder 10 or the like in the direction of arrow 11. After being moved in the direction perpendicular to the dummy bar and sealed,
Molten metal 2 is injected into the mold from the injection nozzle 1, and continuous casting is started. Thereafter, after a solidified shell is formed, the seal plate 9 is retracted and the slab is pulled out.
なお、シール板９は別の手段により矢印１２の
方向、即ち鋳片引き抜き方向に90°以上回転させ
るようにもできる。また、溶湯の注入初期にでき
た凝固シエルとダミーバー８が密着して離れない
ように、ダミーバーの先端にはＴ字型または逆Ｌ
字型のアングルを取り付けておくとよい。 Note that the seal plate 9 can also be rotated by 90 degrees or more in the direction of the arrow 12, that is, in the slab drawing direction, by another means. In addition, in order to prevent the solidified shell formed at the initial stage of pouring the molten metal from coming into close contact with the dummy bar 8, the tip of the dummy bar has a T-shape or an inverted L shape.
It is a good idea to attach a letter-shaped angle.
（実施例）
鋳片厚み50mm、鋳造可能な鋳片幅800〜1300mm
の能力があるベルト式連続鋳造装置で、その短辺
鋳型は鋳片幅800〜1300mmまで対応できるように
油圧シリンダーで移動可能とした。また、鋳型下
端のシール板は２枚設け、シリンダーによりダミ
ーバーに対して直角方向に各々300mm移動できる
ようにした。(Example) Slab thickness 50mm, castable slab width 800-1300mm
This is a belt-type continuous casting machine with the ability to move the short-side mold using a hydraulic cylinder to accommodate slab widths of 800 to 1,300 mm. In addition, two seal plates were provided at the lower end of the mold, each of which could be moved by 300 mm in a direction perpendicular to the dummy bar using a cylinder.
上記の設備を用いて、幅が800mmになる鋼片の
鋳造を行い、所望量の鋳造を達成したところで鋳
型内への溶湯の注入を終了し、この鋳型内の凝固
シエル及び溶湯を払い出して鋳造終了とした。次
いで鋳片幅が980mmになるように短辺鋳型をセツ
トし、幅が760mmのダミーバーを鋳型下部から鋳
型内へ装入した後、このダミーバーに接触するよ
うにシール板を移動させた。その後、シール板と
ダミーバー上に溶湯の冷却材を投入して、溶湯を
注入して鋳造を開始した。幅が800mmになる鋼片
の鋳造終了から鋳片幅を変更した次の鋳造開始ま
での所要時間は７分であつた。 Using the above equipment, a steel billet with a width of 800 mm is cast. When the desired amount of casting is achieved, pouring of the molten metal into the mold is finished, and the solidified shell and molten metal in the mold are discharged and cast. It ended. Next, a short side mold was set so that the slab width was 980 mm, and a 760 mm wide dummy bar was inserted into the mold from the bottom of the mold, and the seal plate was moved so that it came into contact with the dummy bar. After that, a coolant for the molten metal was placed on the seal plate and the dummy bar, and the molten metal was injected to start casting. The time required from the end of casting a steel slab with a width of 800 mm to the start of the next casting after changing the width of the slab was 7 minutes.
（発明の効果）
以上説明したように本発明によれば、鋳片の幅
を変更して鋳造を開始する際にダミーバーの頭部
を取り替える必要がなくなつたので、生産性が向
上する。(Effects of the Invention) As described above, according to the present invention, it is no longer necessary to replace the head of the dummy bar when changing the width of the slab and starting casting, thereby improving productivity.
第１図は、ベルト式薄鋳片連続鋳造装置の片面
のベルトを省略した図である。
１……注入ノズル、２……溶湯、３……金属ベ
ルト、４……支持金枠、５……ベルト駆動ロー
ル、６……短辺鋳型、８……ダミーバー、９……
シール板、１０……シリンダー、１３……溶湯の
冷却材。
FIG. 1 is a diagram with one side of the belt omitted from the belt-type continuous thin slab casting apparatus. 1... Injection nozzle, 2... Molten metal, 3... Metal belt, 4... Support metal frame, 5... Belt drive roll, 6... Short side mold, 8... Dummy bar, 9...
Seal plate, 10... Cylinder, 13... Coolant for molten metal.
Claims (1)
辺鋳型、又は対向する一対の駆動ベルト式長辺鋳
型で構成される鋳型で連続鋳造を開始するにあた
り、鋳造可能な最小鋳片幅以下のダミーバーと鋳
型下端に設けたシール板により鋳型下部をシール
した後、溶湯を注入することを特徴とする連続鋳
造開始方法。1. Minimum castable slab width when starting continuous casting with a mold consisting of a short side mold that is movable in the slab width direction and a fixed long side mold, or a pair of opposing drive belt type long side molds. A continuous casting start method characterized by sealing the lower part of the mold with the following dummy bar and a seal plate provided at the lower end of the mold, and then injecting molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5891486A JPS62214857A (en) | 1986-03-17 | 1986-03-17 | How to start continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5891486A JPS62214857A (en) | 1986-03-17 | 1986-03-17 | How to start continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62214857A JPS62214857A (en) | 1987-09-21 |
| JPH0361532B2 true JPH0361532B2 (en) | 1991-09-20 |
Family
ID=13098086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5891486A Granted JPS62214857A (en) | 1986-03-17 | 1986-03-17 | How to start continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62214857A (en) |
-
1986
- 1986-03-17 JP JP5891486A patent/JPS62214857A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62214857A (en) | 1987-09-21 |
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