JPS58176054A - Continuous casting method of thin metallic plate - Google Patents

Continuous casting method of thin metallic plate

Info

Publication number
JPS58176054A
JPS58176054A JP5826682A JP5826682A JPS58176054A JP S58176054 A JPS58176054 A JP S58176054A JP 5826682 A JP5826682 A JP 5826682A JP 5826682 A JP5826682 A JP 5826682A JP S58176054 A JPS58176054 A JP S58176054A
Authority
JP
Japan
Prior art keywords
mold
slab
charged
slag bath
molten metal
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.)
Pending
Application number
JP5826682A
Other languages
Japanese (ja)
Inventor
Shoji Ueda
植田　昭二
Takashi Oguro
大黒　貴
Shuji Ono
修二 小野
Hiroshi Sakaguchi
坂口　弘志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP5826682A priority Critical patent/JPS58176054A/en
Publication of JPS58176054A publication Critical patent/JPS58176054A/en
Pending legal-status Critical Current

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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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To cast easily a thin metallic plate by forming the upper part of a casting mold into broad construction, holding a slag bath at a high temp. and cating said plate continuously. CONSTITUTION:The molten metal 2 charged into a casting mold 4 solidifies in the form of embedding a dummy bar head charged in the lower narrow part of the mold 4 therein. When the dummy bar is drawn with a drawing device upon rising of the level of the molten metal to the upper part in the narrow part 4d of the mold 4, the solidified ingot is drawn downward from the lower part of the casting mold. Since the metal 2 falls by passing through the inside of the molten slag bath 10 is beforehand charged therein, the molten metal is refined and cleaned and is insulated of heat by said passage. The molten slag bath 10 in the stage of starting drawing is formed by the slag bath which is separately heated and melted and is charged into the casting mold; thereafter, the slag is formed by the powder flux which is charged therein periodically and is melted by the Joule heat generated by the current flowing between a nonconsumable electrode 7 and a solidified ingot 5. The ingot 5 drawn from the mold 4 is further cooled by the secondary cooling water injected from an injection pipe 6 for secondary cooling water, whereby the continuous casting thin plate is obtained.

Description

【発明の詳細な説明】 本発明は鉄系及び非鉄系の金属薄板を連続鋳造する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously casting ferrous and non-ferrous metal sheets.

金属薄板を連続鋳造する方法を具体的に実施する従来の
連続鋳造装置としては、第１図に示すようなものが知ら
れていた。2. Description of the Related Art As a conventional continuous casting apparatus that concretely carries out a method of continuously casting a thin metal plate, the one shown in FIG. 1 has been known.

第１図において、１はタンディツシュで、図示されてい
ない取鍋から溶湯２が注入され、一時、溜められる。該
タンディツシュ１の下部にはノズル６が装着されており
、タンディツシュ１中の溶湯２は該ノズル６中を通り、
鋳型４中へ注入される。該鋳型４は、鋳造しようとする
鋳片の形状を形成するもので、ノズル６より注入された
溶湯２′を該鋳型４で冷却して凝固させ、凝固鋳片５と
する。このため、鋳型４中は冷却水が循環する構造とな
っており、その冷却水の入口が４ａ、出口が４ｂである
。６は、凝固鋳片５を囲繞する２次冷却水噴射管であり
、２次冷却水入ロ管６ａから冷却水が導入され、２次冷
却水噴射管６の内面に穿設された噴射口６ｂから凝固鋳
片５に噴射され、その温度をさらに低下させる。凝固鋳
片５は、図示されていないピンチロールによって下方に
引き抜かれ、連続鋳造鋳片となる。In FIG. 1, reference numeral 1 denotes a tundish into which molten metal 2 is poured from a ladle (not shown) and is temporarily stored therein. A nozzle 6 is attached to the lower part of the tundish 1, and the molten metal 2 in the tundish 1 passes through the nozzle 6,
Injected into mold 4. The mold 4 forms the shape of the slab to be cast, and the molten metal 2' injected from the nozzle 6 is cooled and solidified by the mold 4 to form a solidified slab 5. For this reason, the mold 4 has a structure in which cooling water circulates, and the cooling water has an inlet 4a and an outlet 4b. Reference numeral 6 denotes a secondary cooling water injection pipe surrounding the solidified slab 5, into which cooling water is introduced from the secondary cooling water inlet pipe 6a, and an injection port bored in the inner surface of the secondary cooling water injection pipe 6. 6b is injected onto the solidified slab 5, further lowering its temperature. The solidified slab 5 is pulled downward by pinch rolls (not shown) to become a continuously cast slab.

しかし、上記の従来装置には、次のような欠点がある。However, the above conventional device has the following drawbacks.

タンディツシュ１に注湯された溶湯２は、上記したよう
にノズルろを経て鋳型４へ注入される。The molten metal 2 poured into the tundish 1 is poured into the mold 4 through the nozzle as described above.

該ノズル乙の内径は、凝固鋳片５の体積と引き抜き速度
によって決定されるため、凝固鋳片５の断面積が小さい
場合、あるいは引き抜き速度が遅い場合には、小さくし
なければならない。しかし、従来の連続鋳造装置のノズ
ル乙の内径は、該ノズルろの内孔が閉塞する懸念から１
３朋以上が普通で、特別な場合でも１０朋程度が最低と
されている。このため、従来の連続鋳造装置によって、
例えば肉厚５０闘以下の薄板を鋳造する場合、ノズルろ
を鋳型４中の溶湯２′へ浸漬するいわゆる浸漬ノズルを
採用できず、鋳型４の上部へ溶湯を落下させて注湯する
方式を採用せざるを得ない。このような注湯方式では、
溶湯中へ空気や非金属介在物を巻き込み、健全な凝固鋳
片５を得ることかで、・・１ きないばかりか、溶湯が鋳型４壁へ部分的に固着し、そ
の後に注湯される溶湯が鋳型４内の溶湯プールに充分供
給されず、凝固鋳片５が破断する事態がしばしば生じる
という欠点がある。The inner diameter of the nozzle B is determined by the volume of the solidified slab 5 and the drawing speed, so it must be made small when the cross-sectional area of the solidified slab 5 is small or when the drawing speed is slow. However, the inner diameter of the nozzle B in conventional continuous casting equipment has been set to 1.
A score of 3 or more is normal, and even in special cases, a minimum of 10 is considered. Therefore, with conventional continuous casting equipment,
For example, when casting a thin plate with a wall thickness of 50 mm or less, it is not possible to use a so-called immersion nozzle, in which the nozzle is immersed in the molten metal 2' in the mold 4, and instead a method is adopted in which the molten metal is dropped into the upper part of the mold 4 and poured. I have no choice but to do it. In this type of pouring method,
By getting air and non-metallic inclusions into the molten metal and obtaining a sound solidified slab 5,...1 Not only is it impossible to obtain a solidified slab 5, but the molten metal partially sticks to the wall of the mold 4 and is then poured. There is a disadvantage that the molten metal is not sufficiently supplied to the molten metal pool in the mold 4, and the solidified slab 5 often breaks.

本発明は、上記従来装置による金属薄板の連続鋳造方法
の欠点を解消し、肉厚が５０朋以下の金属薄板を安定し
て連続鋳造できる方法を提供することを目的として提案
されたもので、溶融スラグを滞留させる上部広幅部と、
該広幅部の下部に接して形成され、凝固鋳片の断面形状
を決定する下部狭幅部を内面に有する水冷鋳型を用い、
該水冷鋳型の上部広幅部に溶融スラグを装入してスラグ
浴を形成させるとともに、溶湯を連続的に注湯し、上記
スラグ浴中に配置した非消耗電極と、上記水冷鋳型の下
部狭幅部で凝固形成される凝固鋳片との間に通電するこ
とにより、スラグ浴に発生するジュール熱によって該ス
ラグ浴を高温に保持しながら薄肉、広幅の鋳片を連続鋳
造することを特徴とする金属薄板の連続鋳造方法に係る
ものである。The present invention has been proposed for the purpose of eliminating the drawbacks of the continuous casting method of metal thin plates using the above-mentioned conventional equipment and providing a method that can stably and continuously cast metal thin plates with a wall thickness of 50 mm or less. an upper wide part for retaining molten slag;
Using a water-cooled mold having a lower narrow part on the inner surface that is formed in contact with the lower part of the wide part and determines the cross-sectional shape of the solidified slab,
Molten slag is charged into the upper wide part of the water-cooled mold to form a slag bath, and the molten metal is continuously poured into the slag bath, and a non-consumable electrode placed in the slag bath and the lower narrow part of the water-cooled mold are charged. The method is characterized by continuous casting of thin-walled and wide slabs while maintaining the slag bath at a high temperature by the Joule heat generated in the slag bath by passing electricity between the solidified slabs that are solidified and formed in the slag bath. This relates to a continuous casting method for thin metal sheets.

以下第２図及び第６図を参照しながら本発明方法につき
具体的に説明する。それらの図で１はタンディツシュ、
２は溶湯、６は注湯ノズル、４は水冷鋳型、５は凝固鋳
片、６は２次冷却水噴射管をそれぞれ示し、それら部材
の構成、作用及び相互の関係構造は、上記第１図に示す
従来装置のものとほぼ同様である。（均等部分には同一
符号を付しである。） 第２図において、４ｃは水冷鋳型４の内面の上部に形成
された広幅部で、同上部広幅部４ｃの幅Ｗは、注湯ノズ
ルろ及び後述する非消耗電極が挿入できる間隔に形成さ
れている。４ｄは該上部広幅部４ｃの下部に接して形成
された下部狭幅部で、同下部狭幅部４ｄは凝固鋳片５の
横断面寸法を決める部分である。本発明で使用する水冷
鋳型４の内面は上記のように構成されている。７は水冷
鋳型の上部広幅部４ｃ内に装入された溶融スラグ１０内
に下端を挿入された非消耗電極で同電極７と水冷鋳型４
で凝固形成された凝固鋳片５とは電源８を介装されたリ
ード線９で結線されており、水冷鋳型４の上部広幅部４
ｃ内の溶融スラグ１゜は、非消耗電極７と凝固鋳片との
間で溶融スラグ１０浴を通って流れる電流によって発生
するジュール熱によって加熱、保温されて、高温に保持
されるようになっている。なお、溶融スラグ浴１゜は、
通常１Ａ１２０３−８１０２−ＣａＤ系の材質のものが
使用される。The method of the present invention will be specifically explained below with reference to FIGS. 2 and 6. In those figures, 1 is Tanditshu,
2 is the molten metal, 6 is the pouring nozzle, 4 is the water-cooled mold, 5 is the solidified slab, and 6 is the secondary cooling water injection pipe. This is almost the same as the conventional device shown in . (Equivalent parts are given the same reference numerals.) In Fig. 2, 4c is a wide part formed at the upper part of the inner surface of the water-cooled mold 4, and the width W of the upper wide part 4c is the same as that of the pouring nozzle filter. and are formed at intervals that allow insertion of non-consumable electrodes, which will be described later. 4d is a lower narrow part formed in contact with the lower part of the upper wide part 4c, and the lower narrow part 4d is a part that determines the cross-sectional dimension of the solidified slab 5. The inner surface of the water-cooled mold 4 used in the present invention is configured as described above. Reference numeral 7 denotes a non-consumable electrode whose lower end is inserted into the molten slag 10 charged into the upper wide part 4c of the water-cooled mold.
The solidified slab 5 formed by solidification is connected with a lead wire 9 through which a power source 8 is inserted, and the upper wide part 4 of the water-cooled mold 4
The molten slag 1° in c is heated and kept at a high temperature by Joule heat generated by the current flowing through the molten slag 10 bath between the non-consumable electrode 7 and the solidified slab. ing. In addition, molten slag bath 1° is:
Usually, 1A1203-8102-CaD type material is used.

つぎに本発明方法の実施態様について説明する。Next, embodiments of the method of the present invention will be described.

本実施例では、肉厚＝１０朋、幅１，０００ｍｍの薄ス
ラブを鋳造した。In this example, a thin slab with a wall thickness of 10 mm and a width of 1,000 mm was cast.

図示されない取鍋からタンディツシュ１に注湯された炭
素鋼溶湯（Ｃ＝０．２％、Ｓ　ｉ　＝　Ｑ、　６％、Ｍ
ｎ二〇５％）２は、タンディツシュ１の下部に設けられ
たノズル６を通って、水冷鋳型４に注入される。どの際
、ノズル６として、内径１５ｍｍのものが、広幅方向に
５００ｍｍの間隔で２本取付けられている。それらは、
適宜な手段で広幅方向に往復動させて、鋳型へ溶湯を注
入するようにしてもよい。Molten carbon steel (C = 0.2%, S i = Q, 6%, M
n205%) 2 is injected into the water-cooled mold 4 through a nozzle 6 provided at the bottom of the tundish 1. In each case, two nozzles 6 having an inner diameter of 15 mm are attached at an interval of 500 mm in the width direction. They are,
The molten metal may be injected into the mold by reciprocating in the wide direction using an appropriate means.

鋳型４に注入された溶湯２は、鋳型４の下部狭幅部に装
入されていた図示されないダミーバーヘッドを鋳包んだ
形で凝固する。鋳型４へ注湯された溶湯の位置（レベル
）が、鋳型４の狭幅部４ｄの上部まで上昇したとき、図
示されない引抜装置によってダミバーを引抜くと凝固し
た鋳片は鋳型の下部から下方へ引抜かれる。The molten metal 2 poured into the mold 4 solidifies in a state in which a dummy bar head (not shown), which has been charged into the narrow lower part of the mold 4, is cast. When the position (level) of the molten metal poured into the mold 4 rises to the top of the narrow part 4d of the mold 4, when the dummy bar is pulled out by a pulling device (not shown), the solidified slab flows downward from the bottom of the mold. It gets pulled out.

この際、鋳型４に注入された溶湯２は、事前に装入され
ていた溶融スラグ浴１０中を通って落下するので、精練
されて清浄になるとともに、それによって保温される。At this time, the molten metal 2 poured into the mold 4 falls through the molten slag bath 10 that had been charged in advance, so that it is refined and becomes clean, and is thereby kept warm.

なお、引抜開始時の溶融スラグ浴１０は、別途加熱溶融
し、鋳型へ装入されたものによって形成されるが、その
後は、定期的に装入された粉末フラックスが非消耗電極
７と凝固鋳片５との間に流れる電流によって発生するジ
ュール熱で溶融することによって形成される。The molten slag bath 10 at the start of drawing is formed by separately heating and melting the slag and charging it into the mold, but after that, the powder flux periodically charged connects the non-consumable electrode 7 and the solidified slag. It is formed by being melted by Joule heat generated by the current flowing between it and the piece 5.

次に、鋳型４から引抜かれた凝固鋳片５は、さらに２次
冷却水噴射管乙の内面の噴射口６ｂから噴射される２次
冷却水によって冷却されて肉厚１０酊、幅１，０００ｍ
ｍの連続鋳造薄板が得られる。Next, the solidified slab 5 pulled out from the mold 4 is further cooled by secondary cooling water injected from the injection port 6b on the inner surface of the secondary cooling water injection pipe B, and has a thickness of 10 m and a width of 1,000 m.
m of continuously cast thin plates are obtained.

以上型するに本発明は、溶融スラグな滞留させる上部広
幅部と、該広幅部の下部に接して形成され、凝固鋳片の
断面形状を決定する下部狭幅部を内面に有する水冷鋳型
を用い、該水冷鋳型の上部広幅部に溶融スラグを装入し
てスラグ浴を形成させるとともに、溶湯な連続的に注湯
し、上記スラグ浴中に配置した非消耗電極と、上記水冷
鋳型の下部狭幅部で凝固形成されろ凝固鋳片との間に通
電することにより、スラグ浴に発生するジュール熱によ
って該スラグ浴を高温に保持しながら薄肉、広幅の鋳片
を連続鋳造することを特徴とする金属薄板の連続鋳造方
法に係るものであるから本発明によれば、 （１）　　鋳型の上部を広幅構造としているため、肉厚
が５０ｍｚ以下の薄スラブを鋳造する際も、従来のノズ
ルによって鋳造出来る。In summary, the present invention uses a water-cooled mold having an upper wide part for retaining molten slag and a lower narrow part on the inner surface, which is formed in contact with the lower part of the wide part and determines the cross-sectional shape of the solidified slab. The molten slag is charged into the wide upper part of the water-cooled mold to form a slag bath, and the molten metal is continuously poured into the slag bath, and the non-consumable electrode placed in the slag bath is connected to the narrow lower part of the water-cooled mold. It is characterized by continuous casting of thin-walled and wide slabs while maintaining the slag bath at a high temperature by Joule heat generated in the slag bath by passing electricity between the solidified slab and the solidified slab formed in the width part. According to the present invention, (1) Since the upper part of the mold has a wide structure, even when casting a thin slab with a wall thickness of 50 ms or less, it is possible to cast a thin slab using a conventional nozzle. Can be cast.

（２）鋳型上部の広幅部に注入された溶湯が高温の溶融
スラグによって、鋳型上部で凝固するのが防止されると
ともに溶湯の清浄化が可能となる。(2) The high-temperature molten slag prevents the molten metal poured into the wide part of the upper part of the mold from solidifying at the upper part of the mold, and the molten metal can be cleaned.

（３）溶融スラグ浴は、非消耗電極と凝固鋳片との間に
流した電流によって発生するジュール熱で常に高温に維
持され、鋳型に注入された溶湯の保温に著しい効果を発
揮する。(3) The molten slag bath is constantly maintained at a high temperature by Joule heat generated by the electric current passed between the non-consumable electrode and the solidified slab, and is extremely effective in keeping the molten metal poured into the mold warm.

（４）ノズルを鋳型の広幅（長手）方向に往復動させれ
ば広幅鋳片の鋳造が可能となる。(4) By reciprocating the nozzle in the wide (longitudinal) direction of the mold, wide slabs can be cast.

などの効果を挙げることができ、肉厚５０ｍｍ以下の金
属薄片の連続鋳造を、容易に行なうことができる。The following effects can be achieved, and continuous casting of thin metal pieces with a wall thickness of 50 mm or less can be easily performed.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来方法を実施する装置の略示的縦断面図、第
２図及び第３図は、本発明を実施する装置の一例の概略
説明図で、第２図は縦断面図、第６図は、第２図のｌｌ
−１線矢視図である。 １：タンディツシュ、２：溶湯、ろ：注湯ノズル、４：
鋳型、４ａ：冷却水入口、４ｂ：冷却水出口、４Ｃ：鋳
型内面上部広幅部、４ｄ：鋳片形成部、５：凝固鋳片、
６：２次冷却噴射管、７：非消耗電極、８：電源、９：
リード線、１０：溶融スラグ浴。 復代理人　弁理士　伊　藤　　　輝 （外２名） １陣 手続補正・書 昭和５７年７月１ａ日 特許庁長官　　若杉和夫　　殿 １、事件の表示 昭和５７年　特　許　願　第５８２６６号車件との関係
　　特　　許　　出願人 任　所　〒１００東京都千代田区丸の内二丁目５番１号
氏　名（６２０）三菱重工業株式会社 代表者　矢　野　鑞 ４、復代理人 住　所　〒１０５東京都港区虎ノ門−丁目２番２９号Ｚ
補正の内容 図面の第２図及び第３図を別紙のとおり訂正する。 以上FIG. 1 is a schematic longitudinal sectional view of an apparatus for carrying out a conventional method, FIGS. 2 and 3 are schematic illustrations of an example of an apparatus for carrying out the present invention, and FIG. Figure 6 is the ll of Figure 2.
-1 line arrow view. 1: Tanditshu, 2: Molten metal, Ro: Pouring nozzle, 4:
Mold, 4a: cooling water inlet, 4b: cooling water outlet, 4C: upper wide part of mold inner surface, 4d: slab forming part, 5: solidifying slab,
6: Secondary cooling injection pipe, 7: Non-consumable electrode, 8: Power supply, 9:
Lead wire, 10: Molten slag bath. Sub-Agent Patent Attorney Teru Ito (2 others) 1st Proceedings Amendment/Written July 1a, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1. Indication of the case 1982 Patent Application No. 58266 Relationship Patent Applicant Address: 2-5-1 Marunouchi, Chiyoda-ku, Tokyo 100 Name (620) Mitsubishi Heavy Industries, Ltd. Representative: Satoshi Yano 4 Sub-agent Address: 2-chome Toranomon, Minato-ku, Tokyo 105 No. 29 Z
Contents of the amendment Figures 2 and 3 of the drawings are corrected as shown in the attached sheet. that's all

Claims (1)

【特許請求の範囲】[Claims] 溶融スラグを滞留させる上部広幅部と、該広幅部の下部
に接して形成され、凝固鋳片の断面形状を決定する下部
狭幅部を内面に有する水冷鋳型を用い、該水冷鋳型の上
部広幅部に溶融スラグを装入してスラグ浴を形成させる
とともに、溶湯を連続的に注湯し、上記スラブ浴中に配
置した非消耗電極と、上記水冷鋳型の下部狭幅部で凝固
形成される凝固鋳片との間に通電することにより、スラ
グ浴に発生するジュール熱によって該スラグ浴−を高温
に保持しながら薄肉、広幅の鋳片を連続鋳造することを
特徴とする金属薄板の連続鋳造方法。A water-cooled mold having an upper wide part for retaining molten slag and a lower narrow part formed in contact with the lower part of the wide part and determining the cross-sectional shape of the solidified slab is used, and the upper wide part of the water-cooled mold is A slag bath is formed by charging molten slag into the slab bath, and molten metal is continuously poured into the slab bath to form a solidification layer between the non-consumable electrode placed in the slab bath and the lower narrow part of the water-cooled mold. A continuous casting method for thin metal sheets, characterized in that thin and wide slabs are continuously cast while the slag bath is kept at a high temperature by the Joule heat generated in the slag bath by applying electricity between the slab and the slab. .
JP5826682A 1982-04-09 1982-04-09 Continuous casting method of thin metallic plate Pending JPS58176054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5826682A JPS58176054A (en) 1982-04-09 1982-04-09 Continuous casting method of thin metallic plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5826682A JPS58176054A (en) 1982-04-09 1982-04-09 Continuous casting method of thin metallic plate

Publications (1)

Publication Number Publication Date
JPS58176054A true JPS58176054A (en) 1983-10-15

Family

ID=13079360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5826682A Pending JPS58176054A (en) 1982-04-09 1982-04-09 Continuous casting method of thin metallic plate

Country Status (1)

Country Link
JP (1) JPS58176054A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007111760A (en) * 2005-10-21 2007-05-10 Hitachi Metals Ltd Continuous casting equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007111760A (en) * 2005-10-21 2007-05-10 Hitachi Metals Ltd Continuous casting equipment
JP4678592B2 (en) * 2005-10-21 2011-04-27 日立金属株式会社 Continuous casting equipment

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