JPS6246265B2 - - Google Patents
Info
- Publication number
- JPS6246265B2 JPS6246265B2 JP15034880A JP15034880A JPS6246265B2 JP S6246265 B2 JPS6246265 B2 JP S6246265B2 JP 15034880 A JP15034880 A JP 15034880A JP 15034880 A JP15034880 A JP 15034880A JP S6246265 B2 JPS6246265 B2 JP S6246265B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- water
- short
- long side
- molds
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000009749 continuous casting Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
本発明は、幅変更作業の能率を改善した鋼の連
続鋳造用の幅可変鋳型に関する。
鋼の連続鋳造において、その稼動率の向上のた
めに鋳型の組替えを行なわないで鋳片幅を任意に
変更するいわゆる幅可変鋳型が開発され、実施化
されている。これは、第１図の平面図にその概略
を示すように、相対する幅を調節可能にした１対
の長辺側鋳型１，１′と、この長辺側鋳型１，
１′の内部において相対する幅を調節可能にした
短辺側鋳型３，３′とからなり、各長辺側鋳型
１，１′と短辺側鋳型３，３′は、それぞれその背
後に固接された長辺側冷却箱２，２′および短辺
側冷却箱４，４′によつて冷却され、長辺側鋳型
は冷却箱に接続する油圧シリンダー等（図示せ
ず）により、また短辺側鋳型は冷却箱に接続する
調整ロツド５，５′によつて相対する幅を調節す
るようになつている。このような幅可変鋳型の幅
変更手順は、まず長辺側鋳型１，１′の幅をゆる
めて短辺側鋳型３，３′との間で若干のすきまを
作り、次に短辺側鋳型３，３′の相対幅を所定幅
になるように調整ロツド５，５′によつて移動調
節し、最後に長辺側鋳型３，３′を締め付けるよ
うな手順によつて行なわれるのが通常である。
ところが、かかる幅可変鋳型においては、短辺
側鋳型の背面の長辺側鋳型表面に異物（第１図の
Ａで示す）が付着して幅可変作業を繁雑なものと
している。この異物の付着原因は種々の要因があ
るが、その主たるものは連続作業性の面から投入
される人口スラグ（パウダー）であると考えられ
る。鋳型内溶鋼上で溶融される人工スラグは微粉
状のパウダーであるのが通常であるが、これが飛
散して第１図のＡのような部分に付着し、空気中
の水分を吸収して異物として固着するものと考え
られる。この異物がＡの部分に固着すると、短辺
側鋳型３，３′を広げた場合にその端部がこの異
物と接することになり、接面にすきまが生じて湯
差し込みブレークアウトの如き重大な支障を生じ
る原因となる。
本発明はこのような問題の解決を目的としてな
されたもので、図面の実施例（第２〜４図）に示
した如く、相対する幅を調節可能にした１対の長
辺側鋳型１，１′と、この長辺側鋳型１，１′の内
部において相対する幅を調節可能にした１対の短
辺側鋳型３，３′とからなる連続鋳造用の幅可変
鋳型において、各短辺側鋳型の背後に各長辺側鋳
型表面の付着物を除去するためのスクレーパー６
を取付け、かつ各短辺側鋳型３，３′の背後にあ
る各長辺側鋳型表面に向けて散水するための散水
装置７，７′を取付けたことを特徴とする。
第２〜４図に示す如く、スクレーバー６は各短
辺側鋳型３，３′の背後に固設された冷却箱４，
４′の両端縁（垂直側の両端縁）に例えばボルト
締めによつて取付られており、長辺側鋳型１，
１′をしめつけた場合には第４図の破線で示した
ごとくスクレーパー６は長辺側鋳型１に圧着状態
となつている。また幅変更作業中に長辺鋳型１，
１′を若干ゆるめた場合にも第４図の実線で示し
たごとく、このスクレーパー６が長辺側鋳型１，
１′の表面と接触状態を保つような弾力性材料で
作られており、短辺側鋳型３，３′を移動させる
さいに、このスクレーパー６が長辺側鋳型１，
１′の表面に摺接移動して研掃作用を供するよう
になつている。このスクレーパー６の形状は短辺
側鋳型３，３′の全高を補うに十分な長さを有す
る長辺状であり、好ましくはその長辺側鋳型表面
に接する縁は外方に傾斜していて該表面の付着物
をすくい取るような形状としてある。本発明にお
いてこのスクレーパ６はポリウレタンゴムを使用
して好結果を得ることができる。なお、図におい
て９はダストカバーである。
散水装置７，７′は、図示のように、短辺側鋳
型３，３′の背後に固設される冷却箱４，４′の上
面に取付けられている。したがつて、この散水装
置７，７′は短辺側鋳型３，３′の移動に伴つて移
動するようになつており、このために給水パイプ
８はフレキシブルチユーブを使用している。この
散水装置７，７′は、冷却箱４，４′の上部から水
平に後方に延び出したパイプからなり、このパイ
プから斜め下方の両側に向けて噴射水を形成する
ためのノズル口が多数設けてある。したがつて、
この散水装置７，７′からは、長辺側鋳型１，
１′の表面（短辺側鋳型３，３′よりも背後の面）
に向けて散水され、短辺側鋳型３，３′が任意の
位置にあるときも、長辺側鋳型１，１′の露出面
（鋳造に供しない面）の実質上全ての面が散水さ
れるようになつている。
この幅可変鋳型を用いて実操業する場合、散水
条件を適切にすることが重要である。高圧かつ多
量の水を噴射すれば、それだけ異方の付着は完全
に防止できるが、高圧に過ぎると飛散した水滴が
鋳型内溶鋼に入り水蒸気爆発を起こしたり、供給
するパウダーを湿らせて品質に悪影響を及ぼす可
能性がある。また水量が多すぎても周囲への流出
が多くなつて好ましくない。このようなことか
ら、散水装置７，７′からの散水の水圧と水量を
種々変化させて実験し、第１表に示すような結果
を得た。
The present invention relates to a variable width mold for continuous casting of steel, which improves the efficiency of width changing operations. In continuous steel casting, so-called variable-width molds have been developed and put into practice, in which the width of the slab can be arbitrarily changed without changing the mold, in order to improve the operating rate. As schematically shown in the plan view of FIG.
Each of the long side molds 1, 1' and the short side molds 3, 3' are fixedly fixed behind each other. The long side mold is cooled by the long side cooling boxes 2, 2' and the short side cooling boxes 4, 4' which are in contact with each other, and the long side mold is cooled by a hydraulic cylinder etc. (not shown) connected to the cooling box. The side molds are adapted to adjust their opposing widths by adjusting rods 5, 5' connected to the cooling box. The procedure for changing the width of such a variable width mold is to first loosen the width of the long side molds 1 and 1' to create a slight gap between them and the short side molds 3 and 3'. Normally, this is done by moving and adjusting the relative width of molds 3 and 3' to a predetermined width using adjustment rods 5 and 5', and finally tightening the long side molds 3 and 3'. It is. However, in such a variable width mold, foreign matter (indicated by A in FIG. 1) adheres to the long side mold surface on the back side of the short side mold, making the width variable work complicated. There are various factors that cause this foreign matter to adhere, but the main one is thought to be the artificial slag (powder) that is thrown in from the standpoint of continuous workability. Artificial slag that is melted on the molten steel in the mold is usually a fine powder, but this scatters and attaches to the area shown at A in Figure 1, absorbs moisture in the air and collects foreign particles. It is thought that it will stick as such. If this foreign matter sticks to part A, when the short side molds 3, 3' are expanded, the ends of the molds will come into contact with this foreign matter, creating a gap in the contact surface and causing a serious problem such as a breakout when hot water is inserted. This may cause problems. The present invention was made with the aim of solving such problems, and as shown in the embodiments of the drawings (Figures 2 to 4), a pair of long side molds 1, whose opposing widths are adjustable, 1' and a pair of short side molds 3, 3' whose opposing widths can be adjusted inside the long side molds 1, 1'. A scraper 6 is installed behind the side mold to remove deposits on the surface of each long side mold.
The present invention is characterized in that a water sprinkling device 7, 7' for sprinkling water toward the surface of each long-side mold behind each short-side mold 3, 3' is installed. As shown in FIGS. 2 to 4, the scraper 6 includes a cooling box 4 fixedly installed behind each short-side mold 3, 3'.
It is attached to both ends of the mold 4' (both ends of the vertical side) by bolting, for example, and the long side mold 1,
1', the scraper 6 is pressed against the long side mold 1, as shown by the broken line in FIG. Also, during the width change work, the long side mold 1,
1' is slightly loosened, as shown by the solid line in FIG.
The scraper 6 is made of an elastic material that maintains contact with the surface of the long side molds 1, 1' when the short side molds 3, 3' are moved.
It is adapted to slide into contact with the surface of 1' to provide a cleaning action. The shape of this scraper 6 is a long side shape having a length sufficient to compensate for the total height of the short side molds 3, 3', and preferably the edge in contact with the long side mold surface is inclined outward. The shape is such that it can skim off deposits on the surface. In the present invention, good results can be obtained by using polyurethane rubber for the scraper 6. In addition, in the figure, 9 is a dust cover. As shown in the figure, the water sprinklers 7, 7' are attached to the upper surfaces of cooling boxes 4, 4' fixedly installed behind the short-side molds 3, 3'. Therefore, the water sprinklers 7, 7' are designed to move as the short-side molds 3, 3' move, and for this purpose a flexible tube is used as the water supply pipe 8. The water spray devices 7, 7' consist of pipes extending horizontally backward from the tops of the cooling boxes 4, 4', and have many nozzle ports for forming water jets diagonally downward on both sides from the pipes. It is provided. Therefore,
From the water sprinklers 7, 7', the long side molds 1,
1' surface (surface behind short side mold 3, 3')
Even when the short side molds 3, 3' are in any position, substantially all exposed surfaces (surfaces not used for casting) of the long side molds 1, 1' are sprayed with water. It is becoming more and more common. When performing actual operations using this variable width mold, it is important to optimize the watering conditions. If a large amount of water is injected at high pressure, anisotropic adhesion can be completely prevented, but if the pressure is too high, the scattered water droplets may enter the molten steel in the mold, causing a steam explosion, or dampen the supplied powder, resulting in quality problems. There may be negative effects. Also, if the amount of water is too large, it is undesirable because a large amount of water flows out into the surrounding area. For this reason, experiments were conducted by varying the water pressure and amount of water sprayed from the water sprinklers 7 and 7', and the results shown in Table 1 were obtained.
【表】
表１の結果から明らかなごとく、鋳型表面積１
cm2当り１分間に１〜５cm3程度の水量、つまり１〜
５cm3／cm2／minの水量で、噴射ノズル圧が0.1〜
0.3Kg／cm2の水圧で実施すれば本発明の目的が十
分達成できることがわかつた。これは、スクレー
パー６による研掃効果とも相剰するものであつ
て、大量かつ高圧の散水を行なわずとも、付着し
たパウダーが吸水軟化して、これが鋳型表面に残
留したとしてもスクレーパー６によつて容易に除
去できることを示している。従つて本発明はま
た、鋳造に供されない露出（開放）した鋳型面に
対し、１〜５cm3／cm2／minの散水を常時散水する
と共に、幅を変更するさいにこの散水される鋳型
面をスクレーパーによつて掃除することを特徴と
する幅可変更鋳型による鋼の連続鋳造法を提供す
るものである。
以上のようにして本発明によれば、従来、主と
して長辺鋳型表面に付着した異物除去のために幅
変更作業に多くの時間を要していたものが、極め
て短時間でこれを実施でき、例えば稼動率におい
て５〜10％の向上が達成され、また鋳型の寿命も
異物かみ込みによるすり疵の減少によつて30％程
度も延長することができ、本発明の効果は極めて
著しいものがある。[Table] As is clear from the results in Table 1, the mold surface area 1
The amount of water per cm 2 per minute is about 1 to 5 cm 3 , that is, 1 to 5 cm 3 per minute.
At a water flow rate of 5cm 3 /cm 2 /min, the injection nozzle pressure is 0.1~
It has been found that the object of the present invention can be fully achieved by carrying out the experiment at a water pressure of 0.3 Kg/cm 2 . This is compatible with the cleaning effect of the scraper 6, and even if the adhering powder absorbs water and becomes soft, even if it remains on the mold surface, the scraper 6 can remove it without spraying a large amount of high-pressure water. This indicates that it can be easily removed. Therefore, the present invention also provides that the exposed (open) mold surface that is not used for casting is constantly sprinkled with water at a rate of 1 to 5 cm 3 /cm 2 /min, and that when changing the width, the mold surface that is sprayed with water is The present invention provides a method for continuous casting of steel using a variable width mold, which is cleaned by a scraper. As described above, according to the present invention, whereas conventionally it took a lot of time to change the width mainly to remove foreign matter attached to the long side mold surface, it can be done in an extremely short time. For example, the operating rate can be improved by 5 to 10%, and the life of the mold can be extended by about 30% due to the reduction in scratches caused by foreign objects being trapped, so the effects of the present invention are extremely significant. .
第１図は幅可変鋳型の従来の代表例を示す平面
図、第２図は本発明実施例の幅可変鋳型の平面
図、第３図は第２図の−′矢視断面図、第４
図は第３図の−′矢視断面拡大図である。
１，１′……長辺側鋳型、２，２′……冷却箱、
３，３′……短辺側鋳型、４，４′……冷却箱、６
……スクレーパー、７……散水装置。
FIG. 1 is a plan view showing a conventional typical example of a variable width mold, FIG. 2 is a plan view of a variable width mold according to an embodiment of the present invention, FIG. 3 is a sectional view taken along the -' arrow in FIG. 2, and FIG.
The figure is an enlarged cross-sectional view taken along the -' arrow in FIG. 1, 1'... Long side mold, 2, 2'... Cooling box,
3, 3'... Short side mold, 4, 4'... Cooling box, 6
...scraper, 7...watering device.
Claims (1)
型と、この長辺側鋳型の内部において相対する幅
を調節可能にした１対の短辺側鋳型とからなる連
続鋳造用の幅可変鋳型において、各短辺側鋳型の
背後に各長辺側鋳型表面の付着物を除去するため
のスクレーパーを取付け、かつ各短辺側鋳型の背
後にある各長辺側鋳型表面に向けて散水するため
の散水装置を取付けたことを特徴とする連続鋳造
用の幅可変鋳型。1. Variable width for continuous casting, consisting of a pair of long-side molds whose opposing widths can be adjusted and a pair of short-side molds whose opposing widths can be adjusted inside the long-side molds. In the mold, install a scraper behind each short-side mold to remove deposits on the surface of each long-side mold, and spray water toward the surface of each long-side mold behind each short-side mold. A variable width mold for continuous casting, which is characterized by being equipped with a water sprinkler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034880A JPS5772754A (en) | 1980-10-27 | 1980-10-27 | Width variable mold for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034880A JPS5772754A (en) | 1980-10-27 | 1980-10-27 | Width variable mold for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5772754A JPS5772754A (en) | 1982-05-07 |
| JPS6246265B2 true JPS6246265B2 (en) | 1987-10-01 |
Family
ID=15495022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15034880A Granted JPS5772754A (en) | 1980-10-27 | 1980-10-27 | Width variable mold for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5772754A (en) |
-
1980
- 1980-10-27 JP JP15034880A patent/JPS5772754A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5772754A (en) | 1982-05-07 |
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