JPS6138747A - Continuous casting method - Google Patents

Continuous casting method

Info

Publication number
JPS6138747A
JPS6138747A JP16106584A JP16106584A JPS6138747A JP S6138747 A JPS6138747 A JP S6138747A JP 16106584 A JP16106584 A JP 16106584A JP 16106584 A JP16106584 A JP 16106584A JP S6138747 A JPS6138747 A JP S6138747A
Authority
JP
Japan
Prior art keywords
mold
molten steel
free surface
waving
continuous 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.)
Pending
Application number
JP16106584A
Other languages
Japanese (ja)
Inventor
Hisahiko Fukase
久彦 深瀬
Kunio Matsui
邦雄 松井
Nobuhiro Tazoe
信広 田添
Toru Kitagawa
北川　融
Hiroaki Sato
博明 佐藤
Masaaki Otsuki
大槻　政昭
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.)
IHI Corp
JFE Engineering Corp
Original Assignee
IHI Corp
NKK Corp
Nippon Kokan 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 IHI Corp, NKK Corp, Nippon Kokan Ltd filed Critical IHI Corp
Priority to JP16106584A priority Critical patent/JPS6138747A/en
Publication of JPS6138747A publication Critical patent/JPS6138747A/en
Pending legal-status Critical Current

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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • 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
    • B22D11/0697—Accessories therefor for casting in a protected atmosphere

Abstract

PURPOSE:To prevent the generation of defects such as double skins and cracks in a deep channel endless track type continuous casting devide by injecting an inert gas or powder for suppressing waving to the free surface of the molten metal in a casting mold. CONSTITUTION:The molten metal 5 such as molten steel is poured from a nozzle 9 into the casting mold 4 of the deep channel type constituted of endless track mold walls 2, 3 and mold bottoms 6. The mold walls 2, 3 and bottoms 6 forming the mold 4 are moved endlessly to produce a steel ingot. A shielding plate 10 is provided in such a manner that the bottom end on the down stream side of the nozzle 9 contacts with the top surface of the molten steel 5 and the inert gas 12 such as N2 or powder such as glass powder is blown from plural nozzles 11 to the free surface of the molten steel 5 in the mold 4 on the down stream. The waving of the free surface of the molten steel 5 is suppressed and the free surface is eliminated upon solidification. The generation of detects such as double skins and cracks to the steel ingot as a result of the waving of the molten steel surface is thus prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、深溝型無限軌道式等連続鋳造機等０連続鋳造
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a zero continuous casting method such as a continuous casting machine such as a deep groove endless track type.

〔従来の技術〕[Conventional technology]

鋳造板を連続的に鋳出する連続鋳造方法として、第１図
に示す様な鋳型片（１）を無端に連結してなる無限軌道
の鋳型壁（２）　（３）及び鋳型底（図示せず）により
深溝形式の鋳型（４）を形成し、この深溝内に上方よシ
溶鋼を鋳込み、鋳型壁（２）　（３）及び鋳型底を冷却
しつつ循環させ、鋳型片（１）と溶鋼（５）との接触面
に凝固殻を成長させつつ鋳出するものがある。As a continuous casting method that continuously casts a cast plate, a track mold wall (2) (3) and a mold bottom (not shown) are formed by endlessly connecting mold pieces (1) as shown in Fig. 1. A deep-groove type mold (4) is formed using the deep groove, and molten steel is poured upward into the deep groove, and the mold walls (2), (3) and the mold bottom are cooled and circulated, and the mold piece (1) and the molten steel are poured. (5) Some products are cast while growing a solidified shell on the contact surface.

斯かる連続鋳造方法では、鋳型（４）の上面が全長に亘
って開放されており、注湯された溶鋼の上面が自由表面
となっている。従って、鋳型（４）に注湯した際溶鋼の
自由表面が彼女ち、との彼女が溶鋼の凝固状態に影響し
、鋳出された鋳造板の２重肌、割れ等の欠陥を引起す。In such a continuous casting method, the upper surface of the mold (4) is open over its entire length, and the upper surface of the poured molten steel is a free surface. Therefore, when the molten steel is poured into the mold (4), the free surface of the molten steel affects the solidification state of the molten steel, causing defects such as double skin and cracks in the cast plate.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は、上記した実情を鑑み、注湯時の自由表面の彼
女を早期に抑制し、鋳造板の２重肌、割れ等の欠陥の発
生を防止するものである。The present invention has been made in view of the above-mentioned circumstances, and is intended to prevent the occurrence of defects such as double skin and cracks in a cast plate by quickly suppressing the deformation of the free surface during pouring.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、注湯位置以外の溶鋼の自由表面に波立抑制剤
を噴射することを特徴とする水平連続鋳造方法に係るも
ので、彼女を早期に抑制して彼女の影響による２重肌、
割れ等の欠陥を解消するものである。The present invention relates to a horizontal continuous casting method characterized by injecting a ripple suppressant onto the free surface of molten steel other than the pouring position, and is capable of early suppressing ripples to prevent double skin due to the influence of ripples.
This eliminates defects such as cracks.

〔実施　例〕〔Example〕

以下図面を参照しつつ本発明の詳細な説明する。 The present invention will be described in detail below with reference to the drawings.

第２図は本発明を実施するに好ましい装置の１例を示す
概略図であり、第１図と同一のものには同符号を付しで
ある。FIG. 2 is a schematic diagram showing an example of a preferred apparatus for carrying out the present invention, and the same parts as in FIG. 1 are given the same reference numerals.

鋳型（４）は前記した様に鋳型片（１）を無端に連結し
てなる無限軌道の鋳型壁（２）（３）及び鋳型底（６）
によシ深溝を形成し、鋳型壁（２）　（３）及び鋳型底
（６）はそれぞれローラ（７）に掛回して図中矢印方向
へ循環させる様になっており、深溝の始端は耐火ブロッ
ク（８）で仕切っている。該深溝の始端部の上方に注湯
用のノズル（９）を設け、該ノズル（９）の下流側下端
が溶鋼（５）の上面に接する如く遮蔽板（１０）を設け
る。又、遮蔽板００）の更に下流に冷却気体噴出ノズル
α１）を所要数適宜な間隔で設け、該ノズル０υよシ窒
素ガス等の不活性冷却ガスａ２を溶鋼表面に噴出する様
にする。As described above, the mold (4) has endless track mold walls (2), (3) and a mold bottom (6) formed by endlessly connecting the mold pieces (1).
The mold walls (2) (3) and the mold bottom (6) are each wrapped around a roller (7) to circulate in the direction of the arrow in the figure, and the starting end of the deep groove is made of fireproof It is divided by blocks (8). A pouring nozzle (9) is provided above the starting end of the deep groove, and a shielding plate (10) is provided so that the downstream lower end of the nozzle (9) contacts the upper surface of the molten steel (5). Furthermore, a required number of cooling gas jetting nozzles α1) are provided at appropriate intervals further downstream of the shielding plate 00), so that an inert cooling gas a2 such as nitrogen gas is jetted from the nozzles 0υ onto the surface of the molten steel.

上記装置に於いて、ノズル（９）よシ溶鋼（５）を鋳型
内（深溝）に注湯すると、注湯により溶鋼表面の彼女は
遮蔽板００）をくぐって下流側に伝播される。然し、遮
蔽板００よシ下流の溶鋼表面には、噴射ノズル（１］）
によって冷却ガス（１２）が吹付けられておシ、彼女っ
て液面が高くなる部分程強くおし下げられるため彼女が
抑制されて早期に抑制されると共に表面が冷却凝固し自
由表面でなくなる。In the above device, when molten steel (5) is poured into the mold (deep groove) through the nozzle (9), the surface of the molten steel is propagated downstream through the shielding plate 00). However, there is an injection nozzle (1) on the molten steel surface downstream of the shield plate 00.
Cooling gas (12) is blown onto the surface, and the higher the liquid level is, the more forcefully it is pushed down, so it is suppressed and suppressed early, and the surface cools and solidifies, no longer being a free surface. .

而して、自由表面の彼女に起因する鋳造板の２重肌、割
れ等の欠陥が防止される。In this way, defects such as double skin and cracks in the cast plate caused by free surface defects are prevented.

同、前記した遮蔽板００）は冷却ガス卸の影響によって
ノズル出口の注湯の乱れを防止するものである。The above-mentioned shielding plate 00) is used to prevent disturbances in the pouring of molten metal at the nozzle outlet due to the influence of cooling gas flow.

又、溶鋼表面に吹付けるものは冷却ガス以外の例えばガ
ラスの粉等の粉体であってもよい。Further, the material sprayed onto the surface of the molten steel may be a powder other than the cooling gas, such as glass powder.

更に、溶鋼表面に吹付ける冷却ガス、粉体等の波立抑制
剤は、表面に対し傾斜させてもよい。Furthermore, the ripple suppressing agent such as cooling gas or powder that is sprayed onto the surface of the molten steel may be inclined with respect to the surface.

又、双ロール連続鋳造機におけるロール開港だまりにも
適用できる。It can also be applied to a roll opening pool in a twin roll continuous casting machine.

〔発明の効果〕〔Effect of the invention〕

以上述べた如く本発明によれば、鋳型内の溶鋼の自由表
面に発生する彼女を早期に抑制し得、鋳造板の２重肌、
割れ等の欠陥を防止し得る。As described above, according to the present invention, it is possible to early suppress the occurrence of shedding on the free surface of molten steel in the mold, and the double skin of the cast plate.
Defects such as cracks can be prevented.

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

第１図は深溝型無限軌道式水平連続鋳造機の平面概略図
、第２図は本発明を実施するに好ましい深溝型無限軌道
式水平連続鋳造機の部分室断面図である。 （４）は鋳型、（５）は溶鋼、（９）はノズル、００）
は遮蔽板、α渇は冷却ガスを示す。FIG. 1 is a schematic plan view of a deep groove type horizontal continuous casting machine, and FIG. 2 is a sectional view of a partial chamber of the deep groove type horizontal continuous casting machine, which is preferable for carrying out the present invention. (4) is the mold, (5) is the molten steel, (9) is the nozzle, 00)
indicates the shielding plate, and α indicates the cooling gas.

Claims (1)

【特許請求の範囲】[Claims] １）注湯位置以外の溶鋼の自由表面に波立抑制剤を噴射
することを特徴とする連続鋳造方法。1) A continuous casting method characterized by injecting a ripple suppressant onto the free surface of molten steel other than the pouring position.
JP16106584A 1984-07-31 1984-07-31 Continuous casting method Pending JPS6138747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16106584A JPS6138747A (en) 1984-07-31 1984-07-31 Continuous casting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16106584A JPS6138747A (en) 1984-07-31 1984-07-31 Continuous casting method

Publications (1)

Publication Number Publication Date
JPS6138747A true JPS6138747A (en) 1986-02-24

Family

ID=15727945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16106584A Pending JPS6138747A (en) 1984-07-31 1984-07-31 Continuous casting method

Country Status (1)

Country Link
JP (1) JPS6138747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023661A1 (en) * 1994-03-04 1995-09-08 Mannesmann Ag Process and device for cooling molten steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023661A1 (en) * 1994-03-04 1995-09-08 Mannesmann Ag Process and device for cooling molten steel
CN1046447C (en) * 1994-03-04 1999-11-17 曼内斯曼股份公司 Process and device for cooling molten steel

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