JPS61126954A - Pouring method of molten metal in vessel - Google Patents
Pouring method of molten metal in vesselInfo
- Publication number
- JPS61126954A JPS61126954A JP24623084A JP24623084A JPS61126954A JP S61126954 A JPS61126954 A JP S61126954A JP 24623084 A JP24623084 A JP 24623084A JP 24623084 A JP24623084 A JP 24623084A JP S61126954 A JPS61126954 A JP S61126954A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- inert gas
- packing
- ladle
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は鋼の製造時タンディツシュや取鍋内の溶湯の注
入開始方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for starting the injection of molten metal into a tundish or ladle during the manufacture of steel.
従来の技術
従来、川の製造時、例えば連続鋳造法において、溶湯容
器ノズル内に硅砂等の詰物を入れ、注入開始前に溶湯が
ノズル下部のプレートと溶着するのを防止している。そ
して詰物は注入開始時溶湯と共に下部の鋳型やタンディ
ツシュに入り込むのが一般的である。BACKGROUND OF THE INVENTION Conventionally, when manufacturing rivers, for example in continuous casting, a filler such as silica sand is placed in the nozzle of a molten metal container to prevent the molten metal from welding to the plate at the bottom of the nozzle before injection begins. The filling generally enters the lower mold or tundish together with the molten metal at the start of pouring.
一方これら容器ノズル内硅砂等の不純物を系外に除く場
合は別の容器に所定量の捨湯を行ない、しかる後に鋳型
やタンディツシュへの注入を実施するケースもある。又
硅砂等の代りにネール屑が使用される場合もあるが、こ
の場合には注入開始時、ノズルの自然開孔は不可能であ
りノズル内のネール屑を酸素洗浄により、強制的にノズ
ル開孔を行なうことが前提となる。On the other hand, in order to remove impurities such as silica sand inside the container nozzle, there are cases where a predetermined amount of hot water is poured into another container and then poured into a mold or tundish. In some cases, nail scraps are used instead of silica sand, but in this case, it is impossible for the nozzle to open naturally at the start of injection, and the nail scraps inside the nozzle are forced to open by cleaning with oxygen. It is a prerequisite that the hole be drilled.
その他ノズルの閉塞を防ぐ従来技術として、特開昭５２
−８８２２１号、特開昭５８−Ｅｉ６３５８号、特開昭
５６−８８３８１号に示されるものがあるが、いずれも
鋳込開始前に充填した詰物は、鋳込開始と共に溶湯と共
に鋳型内に入り込んでしまう。Other conventional techniques for preventing nozzle blockage include JP-A-52
-88221, JP-A-58-Ei6358, and JP-A-56-88381, all of which show that the filler filled before the start of casting enters the mold together with the molten metal at the start of casting. Put it away.
発明が解決しようとする問題点
従来技術では溶湯の中に硅砂等の不純物が混スし、注入
初期の溶湯の介在物レベルを著しく悪化させる。Problems to be Solved by the Invention In the prior art, impurities such as silica sand are mixed into the molten metal, which significantly deteriorates the level of inclusions in the molten metal at the initial stage of pouring.
又捨湯方式では溶湯の歩留ロス、生産能力の低下をもた
らし、さらにネール屑を使用するケースでは、酸素洗浄
による取鍋ノズルの強制開孔が前提のため、例えば連続
鋳造法では、溶湯の空気酸化を防止するレードルロング
ノズルの装着ができず、このため注入溶湯の品質レベル
を著しく悪化させるため、一般的には採用されていない
。In addition, the discarded metal method results in a loss of molten metal yield and a reduction in production capacity.Furthermore, in the case of using nail scraps, the ladle nozzle must be forcibly opened by oxygen cleaning.For example, in the continuous casting method, the molten metal is It is not generally used because it is not possible to install a ladle long nozzle to prevent air oxidation, which significantly deteriorates the quality level of the injected molten metal.
本発明はこのような問題解決を計ってなされたものであ
る。The present invention has been made to solve such problems.
問題点を解決するための手段
本発明は、容器からの溶湯注入開始時、ノズルの自然開
孔を目的としてノズル内にノズル詰物を用いる方法にお
いて、ノズルを不活性ガス吹込み可能なポーラスタイプ
ノズルとし、ノズル開孔以前に該ノズル内に不活性ガス
を吹込んで、ノズル内の珪砂等のノズル詰物を除去した
後、溶湯の注入を開始することを特徴とする容器内溶湯
の注入方法である。Means for Solving the Problems The present invention provides a porous type nozzle in which an inert gas can be blown into the nozzle in a method of using a nozzle plug in the nozzle for the purpose of spontaneous opening of the nozzle when starting pouring molten metal from a container. This is a method for pouring molten metal into a container, characterized in that before the nozzle is opened, an inert gas is blown into the nozzle to remove nozzle clogging such as silica sand in the nozzle, and then pouring of the molten metal is started. .
作用
以下本発明の構成及び作用を図面に示した実施例をもっ
て説明する。Function The structure and function of the present invention will be explained below with reference to embodiments shown in the drawings.
第１図に本発明を取鍋に適用した場合の構成を示した。FIG. 1 shows the configuration when the present invention is applied to a ladle.
図中１は取鍋、１−１は取鍋鉄皮、１−２は取鍋レンガ
、２は溶湯、３はスラグ、４は上ノズル、５はノズル詰
物、６は不活性ガス吹込みパイプ、７は不活性ガス流量
指示調節計、８はスライディングノズル上プレート、９
はスライディングノズル下プレート、１Ｇは下ノズル、
１１はスライディングノズル摺動装置、１２はし一ドル
ロングノズル、１３はタンディツシュである。In the figure, 1 is a ladle, 1-1 is a ladle shell, 1-2 is a ladle brick, 2 is a molten metal, 3 is a slag, 4 is an upper nozzle, 5 is a nozzle filling, 6 is an inert gas blowing pipe , 7 is an inert gas flow rate indicator controller, 8 is a sliding nozzle upper plate, 9
is the sliding nozzle lower plate, 1G is the lower nozzle,
11 is a sliding nozzle sliding device, 12 is a long nozzle, and 13 is a tundish.
不活性ガス吹込みバイブロは、その先端をポーラスタイ
プ上ノズル４の下端部に到達させて設もす、中間に不活
性ガス流量指示調節計７を設ける。The inert gas blowing vibro is provided with its tip reaching the lower end of the porous type upper nozzle 4, and an inert gas flow rate indicator controller 7 is provided in the middle.
不活性ガス吹込みバイブロから吹込む不活性ガスは、Ａ
ｒ、 Ｎ２などを用い、その圧力をノズル詰物５が溶湯
２の静圧に打勝って浮上できる圧力とする。The inert gas blown from the inert gas blowing vibro is A.
Using R, N2, etc., the pressure is set to such a level that the nozzle filling 5 can overcome the static pressure of the molten metal 2 and float to the surface.
上ノズル４はポーラスタイプとし、不活性ガスを通過さ
せると共に、溶湯の浸透を防止できるものとするが、こ
れは現在製鋼分野で通常使用されているものでよい。The upper nozzle 4 is of a porous type, which allows inert gas to pass through and prevents penetration of molten metal, and may be of a type commonly used in the steel manufacturing field.
通常取鍋ｌに溶ｉｓ２を受ける前に、上ノズル４に詰物
５を入れ置きしておく、この状態で受湯を行ない、取鍋
ｌをタンディツシュ１３上の所定の位置に移動後、レー
ドルロングノズル１２をセットする。Normally, before receiving the melt is2 in the ladle L, the filling 5 is placed in the upper nozzle 4. After receiving the hot water in this state, the ladle L is moved to a predetermined position on the tundish 13, and then the ladle Set the nozzle 12.
従来法ではレードルロングノズル１２のセット完了後、
スライディングノズル摺動装置１１によりスライディン
グノズル下プレート９を移動し、上ノズル４、上プレー
ト８．下プレート９の孔の位置を一致させた状態（ノズ
ル全開）として、ノズル詰物５をタンディツシュ１３内
に落下させ、その直後に溶湯がタンディツシュに注入さ
れる。In the conventional method, after the ladle long nozzle 12 is set,
The sliding nozzle lower plate 9 is moved by the sliding nozzle sliding device 11, and the upper nozzle 4, upper plate 8. With the holes in the lower plate 9 aligned (the nozzles are fully open), the nozzle filler 5 is dropped into the tundish 13, and immediately thereafter the molten metal is poured into the tundish.
本発明ではかかる溶湯注入開始以前に、不純物がタンデ
ィツシュ内に混入することを防止するため、ノズル内の
ノズル詰物を事前に上ノズルから除去し、かつあらかじ
め取鍋内溶湯上面に投入されたスラグへの浮上、吸着に
より、溶湯への詰物混入を避け、鋼材の高品質化を計っ
たもので、第１図の状態で上プレートを摺動する前に不
活性ガス吹込みバイブロより、ポーラスタイプ上ノズル
４へ不活性ガスを吹込み、ノズル詰物５を上ノズル４よ
り除去する。上ノズル４内よりノズル詰物が除去された
後も不活性ガスの吹込みは継続し、常に高温の溶湯の上
ノズル内への移動により、上ノズル内での溶湯の凝固を
防止する。In the present invention, in order to prevent impurities from entering the tundish before the injection of molten metal starts, the nozzle blockage in the nozzle is removed from the upper nozzle in advance, and the slag that has been poured onto the top surface of the molten metal in the ladle is This method aims to improve the quality of the steel material by avoiding the inclusion of fillers in the molten metal by floating and adsorbing the molten metal. Inert gas is blown into the nozzle 4 to remove the nozzle clogging 5 from the upper nozzle 4. Even after the nozzle clogging is removed from the upper nozzle 4, the inert gas continues to be blown into the upper nozzle 4, and the high-temperature molten metal always moves into the upper nozzle, thereby preventing the molten metal from solidifying within the upper nozzle.
一方上ノズル４から除去されたノズル詰物は、溶湯との
比重差により浮上し、あらかじめ溶湯上面に投入されて
いるスラグ中に吸着されるが、不活性ガスの吹込みはこ
のノズル詰物の浮上、分離を促進する効果を合せて持っ
ている。On the other hand, the nozzle filling removed from the upper nozzle 4 floats to the surface due to the difference in specific gravity with the molten metal, and is adsorbed in the slag that has been placed on top of the molten metal in advance. It also has the effect of promoting separation.
不活性ガスの吹込み量は上ノズル内詰物除去後、引続き
の溶湯からの浮上１分離促進時に必要量に制御する。不
活性ガスの吹込みは、スライプ。The amount of inert gas blown is controlled to the amount required for the subsequent promotion of flotation and separation from the molten metal after removing the blockage in the upper nozzle. Inert gas is blown into the slide.
イングノズル摺動装置による注入開始が確認されるまで
継続するのが良い。It is best to continue until the injection nozzle sliding device confirms that the injection has started.
発明の効果
本発明を実施することにより、上ノズル内の詰物はタン
ディツシュへの溶湯の注入以前に取鍋内スラグに浮上、
分離されるので、ノズル詰物による溶湯の汚染は完全に
防止でき、第２図（鋳片長さと介在物指数との関係図）
に示すように特に鋳片端部で大きな効果を示す。Effects of the Invention By carrying out the present invention, the filling in the upper nozzle floats to the slag in the ladle before pouring the molten metal into the tundish.
Since the molten metal is separated, contamination of the molten metal by nozzle clogging can be completely prevented.
As shown in Figure 2, the effect is particularly large at the ends of the slab.
又上ノズルから詰物の除去後の不活性ガスの吹込み継続
により、上ノズル内での溶湯の凝固が防止でき、注入開
始後の自然開孔も確実に実現できる。Furthermore, by continuing to blow inert gas after removing the filler from the upper nozzle, solidification of the molten metal within the upper nozzle can be prevented, and natural opening after the start of injection can be reliably achieved.
第１図は本発明を説明する立面図、第２図は本発明の詳
細な説明図である。
１・Φ争取鍋、ｌ−１・・・取鍋鉄皮、１−２争・Ｑ取
鍋レンガ、２・・・溶湯、３φ＊ｅスラグ、４・・・ポ
ーラスタイプ上ノズル、５参・争ノズル内詰物、６・・
・不活性ガス吹込みパイプ、７・Φ・不活性ガス吹込み
流量指示調節計、８・・舎スライディングノズル上プレ
ート、９拳・・スライディングノズル下プレート、ｌＯ
・・Φスライディングノズル下ノズル、１１・・・スラ
イディングノズル摺動装置、１２・・・し−ドルロング
ノズル、１３・・・タンディツシュ。FIG. 1 is an elevational view illustrating the present invention, and FIG. 2 is a detailed explanatory diagram of the present invention. 1. Φ war ladle, l-1... ladle iron skin, 1-2 war. Q ladle brick, 2.. molten metal, 3.phi.*e slag, 4.. porous type upper nozzle, 5. Filling in the nozzle, 6...
・Inert gas blowing pipe, 7 Φ・Inert gas blowing flow rate indicator controller, 8... Sliding nozzle upper plate, 9 fist... Sliding nozzle lower plate, lO
...Φ Sliding nozzle lower nozzle, 11... Sliding nozzle sliding device, 12... Doll long nozzle, 13... Tandish.
Claims (1)
してノズル内にノズル詰物を用いる方法において、ノズ
ルを不活性ガス吹込み可能なポーラスタイプノズルとし
、ノズル開孔以前に該ノズル内に不活性ガスを吹込んで
、ノズル内の硅砂等のノズル詰物を除去した後、溶湯の
注入を開始することを特徴とする容器内溶湯の注入方法
。In the method of using a nozzle plug in the nozzle for the purpose of spontaneous opening of the nozzle at the start of pouring molten metal from the container, the nozzle is a porous type nozzle capable of injecting inert gas, and the nozzle is filled with inert gas before opening the nozzle. A method for pouring molten metal into a container, which comprises starting injection of molten metal after blowing active gas into the nozzle to remove nozzle clogging such as silica sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24623084A JPS61126954A (en) | 1984-11-22 | 1984-11-22 | Pouring method of molten metal in vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24623084A JPS61126954A (en) | 1984-11-22 | 1984-11-22 | Pouring method of molten metal in vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61126954A true JPS61126954A (en) | 1986-06-14 |
Family
ID=17145444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24623084A Pending JPS61126954A (en) | 1984-11-22 | 1984-11-22 | Pouring method of molten metal in vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61126954A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100766250B1 (en) * | 2001-07-31 | 2007-10-15 | 주식회사 포스코 | Apparatus for anti-leak ingot gold of laddle |
| JP2007326115A (en) * | 2006-06-06 | 2007-12-20 | Sanyo Special Steel Co Ltd | Continuous casting method for lead-containing steel |
| KR100797836B1 (en) * | 2001-08-11 | 2008-01-24 | 주식회사 포스코 | Apparatus For Blocking Leak Of Melting Steel In Ladle |
| CN108555273A (en) * | 2018-06-04 | 2018-09-21 | 东北大学 | A kind of method that bottom blowing inert gas improves ladle self-opening rate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595063A (en) * | 1982-07-01 | 1984-01-11 | 松下電工株式会社 | Phenol-resin laminated board |
-
1984
- 1984-11-22 JP JP24623084A patent/JPS61126954A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595063A (en) * | 1982-07-01 | 1984-01-11 | 松下電工株式会社 | Phenol-resin laminated board |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100766250B1 (en) * | 2001-07-31 | 2007-10-15 | 주식회사 포스코 | Apparatus for anti-leak ingot gold of laddle |
| KR100797836B1 (en) * | 2001-08-11 | 2008-01-24 | 주식회사 포스코 | Apparatus For Blocking Leak Of Melting Steel In Ladle |
| JP2007326115A (en) * | 2006-06-06 | 2007-12-20 | Sanyo Special Steel Co Ltd | Continuous casting method for lead-containing steel |
| JP4521879B2 (en) * | 2006-06-06 | 2010-08-11 | 山陽特殊製鋼株式会社 | Continuous casting method of lead-containing steel |
| CN108555273A (en) * | 2018-06-04 | 2018-09-21 | 东北大学 | A kind of method that bottom blowing inert gas improves ladle self-opening rate |
| CN108555273B (en) * | 2018-06-04 | 2020-03-31 | 东北大学 | Method for improving ladle self-opening rate by bottom blowing inert gas |
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