JPH069731B2 - Operating method for continuous casting of thin sheets - Google Patents
Operating method for continuous casting of thin sheetsInfo
- Publication number
- JPH069731B2 JPH069731B2 JP26144785A JP26144785A JPH069731B2 JP H069731 B2 JPH069731 B2 JP H069731B2 JP 26144785 A JP26144785 A JP 26144785A JP 26144785 A JP26144785 A JP 26144785A JP H069731 B2 JPH069731 B2 JP H069731B2
- Authority
- JP
- Japan
- Prior art keywords
- pouring nozzle
- molten metal
- continuous casting
- casting
- water
- 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
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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/119—Refining the metal by filtering
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、薄板連続鋳造の運転方法に関し、特に注湯ノ
ズルを有するツインドラム式薄板連続鋳造装置における
鋳造開始時の運転方法に関する。Description: TECHNICAL FIELD The present invention relates to an operating method for continuous casting of thin plates, and more particularly to an operating method at the start of casting in a twin-drum type thin plate continuous casting apparatus having a pouring nozzle.
〔従来の技術〕 従来のツインドラム方式の連続鋳造装置の注湯ノズル
は、第２図に示すように、タンデイツシユ１に注湯ノズ
ル２が装着されており、注湯ノズル２内へタンデイツシ
ユ１から溶融金属４がタンデイツシユストツパー３によ
り流量を制御されつつ注入され、注湯ノズル２の下部の
フイルター５と称する吐出口より溶融金属４が、ドラム
４の表面に注湯され、鋳造される。[Prior Art] As shown in FIG. 2, a pouring nozzle of a conventional twin-drum type continuous casting apparatus is equipped with a pouring nozzle 2 on a tundish 1 so that the pouring nozzle 2 can be inserted into the pouring nozzle 2 from the tundish 1 Molten metal 4 is injected while the flow rate is controlled by a tandem spray topper 3, and the molten metal 4 is poured onto the surface of the drum 4 from a discharge port called a filter 5 below the pouring nozzle 2 and cast. .
上記従来装置では次の(1)および(2)の欠点を有してい
る。The above conventional device has the following drawbacks (1) and (2).
(1)タンデイツシユ１から注湯ノズル２内へ溶融金属４
が注入され、ドラム６の表面へ注湯されるが、注湯開始
時は注湯ノズル２内に溶融金属４が充満しないためドラ
ム６の表面へ注湯する溶融金属４は定常流で注湯されな
い。(1) Molten metal 4 from tundish 1 into pouring nozzle 2
Is poured and poured onto the surface of the drum 6, but at the start of pouring, the molten metal 4 does not fill the pouring nozzle 2 so that the molten metal 4 poured onto the surface of the drum 6 is poured in a steady flow. Not done.
(2)このため鋳造開始が困難となり、ブレークアウトの
原因、あるいは、鋳片過凝固によるドラム６の損傷など
のトラブルが発生し、安定した鋳造が困難である。(2) For this reason, it becomes difficult to start casting, causing breakout or troubles such as damage to the drum 6 due to oversolidification of cast slabs, which makes stable casting difficult.
本発明は、上記従来装置における欠点(1)および(2)を解
消する薄板連続鋳造の運転方法を提供することを目的と
し、特に、注湯ノズルを有するツインドラム式薄板連続
鋳造装置における鋳造開始時の運転方法を提供すること
を目的とする。The present invention aims to provide an operation method of thin plate continuous casting that solves the above disadvantages (1) and (2) in the conventional apparatus, and particularly, starts casting in a twin-drum type thin plate continuous casting apparatus having a pouring nozzle. The purpose is to provide a driving method for time.
そして、本発明は、上記目的を達成する手段として、注
湯ノズルの吐出口にスタート板を配設し、かつ、注湯ノ
ズル内を減圧にする点にある。すなわち、本発明は、製
造する金属帯板厚さに相当する間隙を置いて水平に並設
した互いに回転方向を異にする２本の水冷ドラムと、こ
の水冷ドマムの端面に押し当てた２個の固定堰によつて
形成される空間へ溶融金属を注湯ノズルを介して注湯し
所望の薄板を得る連続鋳造の鋳造開始方法において、注
湯ノズルの吐出口にスタート板を配設し、かつ、注湯ノ
ズル内を減圧することを特徴とする薄板連続鋳造の運転
方法である。And, as a means for achieving the above object, the present invention is to dispose a start plate at the discharge port of the pouring nozzle and to reduce the pressure inside the pouring nozzle. That is, according to the present invention, two water-cooling drums that are horizontally arranged with a gap corresponding to the thickness of the metal strip to be manufactured and have different rotation directions from each other, and two water-cooling drums that are pressed against the end surface of the water-cooling drum. In a casting start method of continuous casting, in which a molten metal is poured into a space formed by a fixed weir through a pouring nozzle to obtain a desired thin plate, a start plate is arranged at a discharge port of the pouring nozzle, In addition, it is an operating method of continuous casting of thin plates, characterized in that the inside of the pouring nozzle is depressurized.
本発明では、注湯ノズルの吐出口、具体的にはフイルタ
ー上部にスタート板を配設するものであるが、このスタ
ート板としては溶融金属が接触すると約１分間程度で溶
解する材質からなるものが好ましい。この種材質として
は、普通銅、溶湯と類似する組成の薄板、または場合に
よつて非鉄金属などが用いられる。In the present invention, a start plate is provided on the discharge port of the pouring nozzle, specifically, on the upper part of the filter. The start plate is made of a material that melts in about 1 minute when molten metal comes into contact therewith. Is preferred. As this kind of material, ordinary copper, a thin plate having a composition similar to that of molten metal, or in some cases non-ferrous metal is used.
本発明では、上記したスタート板を配設することによ
り、注湯ノズル内に溶融金属が充満した後に注湯開始さ
れることになるため、均一注湯が可能となる。また、こ
の均一注湯を可能とする効果をより一層高める手段とし
て、本発明では注湯ノズル内を減圧とし、これによつて
溶融金属が注湯ノズル内に充満するまで溶融金属の落下
（注湯）を防ぐようにしたものである。In the present invention, by disposing the above-mentioned start plate, since the molten metal is filled in the molten metal pouring nozzle, the molten metal is started to be poured, so that the uniform molten metal can be poured. Further, as a means for further enhancing the effect of enabling this uniform pouring, in the present invention, the inside of the pouring nozzle is depressurized, whereby the molten metal falls (pouring) until the molten metal fills the pouring nozzle. It was designed to prevent hot water).
以下第１図に基づいて本発明を詳細に説明する。第１図
は本発明の実施例を説明するための図であつて、注湯ノ
ズルを有する薄板連続鋳造装置の断面図を示す。この装
置は、溶鋼等の溶融金属４を蓄えるタンデイツシユ１、
タンデイツシユ１と接続されている注湯ノズル２並びに
注湯ノズル２のフイルター５上部に設けられたスタート
板７を主要構成部材としている。The present invention will be described in detail below with reference to FIG. FIG. 1 is a view for explaining an embodiment of the present invention and is a sectional view of a thin plate continuous casting apparatus having a pouring nozzle. This device is a tundish 1, which stores molten metal 4 such as molten steel.
The main components are a pouring nozzle 2 connected to the tundish 1 and a start plate 7 provided above the filter 5 of the pouring nozzle 2.
タンデイツシユ１は図示しない取鍋により、溶融金属４
を注湯される。注湯された溶融金属４はタンデイツシユ
１内のタンデイツシユストツバー３等により定量蓄えら
れ、その後タンデイツシユストツパー３を開くことによ
り、注湯ノズル２内に溶融金属４が注意される。注湯ノ
ズル２の吐出口にはフイルター５が設けられており、フ
イルター５を介して、ドラム６の表面に溶融金属４が注
湯される。The tundish 1 is placed in a molten metal 4 by a ladle (not shown).
Is poured. The molten metal 4 poured is stored in a fixed amount by the tundish charging stopper 3 and the like in the tundish 1 and then the tundish charging stopper 3 is opened, so that the molten metal 4 is watched in the pouring nozzle 2. A filter 5 is provided at the discharge port of the pouring nozzle 2, and the molten metal 4 is poured onto the surface of the drum 6 via the filter 5.
ここで本発明のポイントであるスタート板７は注湯ノズ
ル２のフイルター５上部に設けられており、フイルター
５の開口部を覆う構造となつている。このスタート板７
は溶融金属４が当ると約１分間程度で溶解する。従つて
スタート板７が溶解するまでに注湯ノズル２内は溶融金
属４が充満し、フイルター５からの均一注湯が可能とな
り、ドラム６の表面に安定して注湯が可能となる。この
ため鋳造スタートが容易となる。Here, the start plate 7, which is the point of the present invention, is provided above the filter 5 of the pouring nozzle 2 and has a structure that covers the opening of the filter 5. This start board 7
When the molten metal 4 hits, it melts in about 1 minute. Therefore, the molten metal 4 is filled in the pouring nozzle 2 before the start plate 7 is melted, and the molten metal 4 can be uniformly poured from the filter 5, so that the surface of the drum 6 can be stably poured. Therefore, casting can be started easily.
また、スタート板７の溶解程度が均一にできない場合不
均一注湯の原因となるため注湯ノズル２内を、図示しな
い排気系により吸気口６より減圧し、溶融金属４が注湯
ノズル２内に充満するまで減圧を保持し、その後大気に
戻すことにより均一圧湯が可能となる。Further, if the degree of melting of the start plate 7 cannot be made uniform, it will cause non-uniform pouring, so that the inside of the pouring nozzle 2 is decompressed from the intake port 6 by an exhaust system (not shown), and the molten metal 4 inside The reduced pressure is maintained until it is full, and then it is returned to the atmosphere to enable uniform pressured water.
なお、吸気口８は溶融金属４を吸い込むことがないよう
に、先端をボーラスプラグ｛鋳物用耐火材の一種で気孔
率の高いレンガ）等で構成し減圧を行う。The intake port 8 is formed of a bolus plug (a kind of refractory material for casting and has a high porosity) at its tip so that the molten metal 4 is not sucked in and the pressure is reduced.
本発明は以上詳記したように、注湯ノズル内にスタート
板を配設し、かつ、この注湯ノズル内を減圧にするもの
であるから、鋳造開始時より均一注湯が可能となり、こ
の結果、鋳造スタート時の操業トラブルが無くなり、安
定操業か可能となる効果が生ずるものである。As described in detail above, according to the present invention, the start plate is provided in the pouring nozzle, and the inside of the pouring nozzle is depressurized. Therefore, uniform pouring is possible from the start of casting. As a result, the operation troubles at the start of casting are eliminated, and the effect that stable operation is possible occurs.
第１図は、本発明の実施例を説明するための図であつ
て、注湯ノズルを有する薄板連続鋳造装置の断面図であ
る。第２図は従来の薄板連続通造装置の断面図である。FIG. 1 is a view for explaining an embodiment of the present invention and is a sectional view of a thin plate continuous casting apparatus having a pouring nozzle. FIG. 2 is a sectional view of a conventional thin plate continuous threading device.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 花中 勝保 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島研究所内 (56)参考文献 実開 昭48−97422（ＪＰ，Ｕ) 特公 昭50−39049（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuho Hananaka 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Research Laboratory (56) References ) Japanese Patent Publication Sho 50-39049 (JP, B1)
Claims (1)
いて水平に並設した互いに回転方向を異にする２本の水
冷ドラムと、この水冷ドラムの端面に押し当てた２個の
固定堰によつて形成される空間へ溶融金属を注湯ノズル
を介して注湯し所望の薄板を得る連続鋳造の鋳造開始方
法において、注湯ノズルの吐出口にスタート板を配設
し、かつ、注湯ノズル内を減圧することを特徴とする薄
板連続鋳造の運転方法。1. A pair of water-cooling drums, which are horizontally arranged side by side with a gap corresponding to the thickness of a metal strip to be manufactured, and have different rotation directions, and two water-cooling drums, which are pressed against the end faces of the water-cooling drum. In a casting start method of continuous casting in which a molten metal is poured into a space formed by a fixed dam through a pouring nozzle to obtain a desired thin plate, a start plate is provided at a discharge port of the pouring nozzle, and A method for operating continuous casting of thin plates, characterized in that the inside of the pouring nozzle is depressurized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26144785A JPH069731B2 (en) | 1985-11-22 | 1985-11-22 | Operating method for continuous casting of thin sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26144785A JPH069731B2 (en) | 1985-11-22 | 1985-11-22 | Operating method for continuous casting of thin sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62124052A JPS62124052A (en) | 1987-06-05 |
| JPH069731B2 true JPH069731B2 (en) | 1994-02-09 |
Family
ID=17362019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26144785A Expired - Fee Related JPH069731B2 (en) | 1985-11-22 | 1985-11-22 | Operating method for continuous casting of thin sheets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069731B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2583513B2 (en) * | 1987-07-03 | 1997-02-19 | 新日本製鐵株式会社 | Nozzle for pouring molten metal |
| US5178205A (en) * | 1990-07-13 | 1993-01-12 | Ishikawajima-Harima Heavy Industries Co. Limited | Strip casting method and apparatus |
| JP7397323B2 (en) * | 2020-06-11 | 2023-12-13 | 日本製鉄株式会社 | Immersion nozzle for twin drum continuous casting equipment |
-
1985
- 1985-11-22 JP JP26144785A patent/JPH069731B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62124052A (en) | 1987-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |