JPS6047034B2 - Casting nozzle for molten metal - Google Patents
Casting nozzle for molten metalInfo
- Publication number
- JPS6047034B2 JPS6047034B2 JP55150840A JP15084080A JPS6047034B2 JP S6047034 B2 JPS6047034 B2 JP S6047034B2 JP 55150840 A JP55150840 A JP 55150840A JP 15084080 A JP15084080 A JP 15084080A JP S6047034 B2 JPS6047034 B2 JP S6047034B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- casting nozzle
- casting
- heating layer
- 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
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
- B22D41/60—Pouring-nozzles with heating or cooling means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【発明の詳細な説明】
この発明は、溶融金属用鋳込ノズルに関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting nozzle for molten metal.
例えば、鋼を連続鋳込するに際して、タンデイッシユ内
の溶鋼を鋳込ノズル（タンデイツシユノズル、以下、単
にノズルと云う）を介してタンデイツシユに鋳込む場合
、溶鋼がノズルを通過する過程で溶鋼の温度低下を来た
し、このためノズル内部て溶鋼が凝固してしまい鋳込不
能となる問題があつた。For example, when continuously casting steel, when molten steel in a tundish is poured into the tundish through a casting nozzle (hereinafter simply referred to as the nozzle), the molten steel is poured into the tundish as it passes through the nozzle. This caused the temperature to drop, which caused the problem that the molten steel solidified inside the nozzle, making it impossible to cast.
そこで、従来、上記問題を解決するノズルとして、例え
ば、特公昭５４−４１９８７号公報に開示されるものが
ある。Conventionally, there is a nozzle disclosed in Japanese Patent Publication No. 54-41987, for example, as a nozzle that solves the above problem.
これは、高周波加熱用コイルをノズルに挿設したもので
ある。しかし、上記従来ノズルでは、高周波加熱用コイ
ルによりノズルを加熱するので、前記コイルの反復使用
がてきる利点を有する反面、加熱効率の面、価格面て問
題があり、しかも、高周波加熱用コイルでは耐火物を発
熱させることができず、鋳込前からのノズルの加熱が行
えないといつた問題があつた。This is a nozzle in which a high-frequency heating coil is inserted. However, in the above-mentioned conventional nozzle, the nozzle is heated by a high-frequency heating coil, so while it has the advantage that the coil can be used repeatedly, there are problems in terms of heating efficiency and cost. There was a problem that the refractory could not be heated and the nozzle could not be heated before casting.
そこで、本願発明者等は、上記問題点を解決するために
鋭意研究を重ねた結果、ノズル内に発熱部を設け、ノズ
ル自体を発熱体とすれば、加熱効率の問題は解決し得る
といつた知見を得た。Therefore, as a result of extensive research in order to solve the above problems, the inventors of the present application have found that the problem of heating efficiency can be solved by providing a heat generating part in the nozzle and using the nozzle itself as a heat generating element. I gained new knowledge.
この発明は、上記知見に基づきなされたものであつて、
溶融金属用のタンデイツシユ等に用いられる鋳造ノズル
において、良導体の耐火物で構成された鋳込ノズル本体
が絶縁用の溝によつて２分割され、鋳込ノズルの溶融金
属通路中央部に抵抗発熱層が形成され、しかも、前記溶
融金属通路内側には絶縁層が形成され、前記鋳込ノズル
本体から通電することによつて、前記抵抗発熱層を加熱
可能にしてなることに特徴を有する。This invention was made based on the above knowledge, and
In a casting nozzle used for tundishes, etc. for molten metal, the casting nozzle body made of a refractory material with good conductivity is divided into two by an insulating groove, and a resistance heating layer is placed in the center of the molten metal passage of the casting nozzle. Further, an insulating layer is formed inside the molten metal passage, and the resistance heating layer can be heated by applying electricity from the casting nozzle body.
第１図は、この発明のノズルの縦断面図である。FIG. 1 is a longitudinal sectional view of the nozzle of the present invention.
第１図に示すように、この発明のノズルは、ノズル本体
１が良導体の耐火物で構成され、ノズル本体１は、内部
に上下方向に形成した溝２により２分割され電気的に絶
縁されている。As shown in FIG. 1, the nozzle of the present invention has a nozzle body 1 made of a refractory material with good conductivity, and the nozzle body 1 is divided into two parts by a groove 2 formed in the vertical direction inside and is electrically insulated. There is.
ノズルの溶融金属通路の中央部には抵抗発熱層３が形成
されていて、ノズル本体１に接続したリード線４を介し
て加熱電源５から通電することによつて、抵抗発熱層３
が発熱するようになつている。更に、ノズルの溶融金属
通路の内側には絶縁層６が形成されている。これにより
、ノズル内を通過する溶融金属の伝熱による温度低下を
防止できることは勿論、溶融金属の温度低下により、鋳
込中のノズル内部で溶融金属が凝固し、鋳込不能となる
といつた問題は起らず、しかも、絶縁層４の作用により
、溶融金属がノズルを通過する際に、通電電流が溶融金
属中に流れるのを完全に防止できる。ノズル本体１及び
抵抗発熱層３としては、Ａｌ２Ｏ３，ＳｉＯ２，ＺｒＯ
２，ＭｇＯ等からなる耐火物に、カーボンブラック、黒
鉛等の炭素と、ＳｉＣ等の炭化物とを単独、又は組合せ
たものを重量％で１〜６０％配合し、電気抵抗率を１０
−３〜１０Ω礪の範囲に調整したものを用い、電気抵抗
率が低いもの（１０−２〜１０−３ΩＣｍ）をノズル本
体１とし、電気抵抗率が高いもの（１０−２〜１０ΩＣ
ｍ）を抵抗発熱層３とする。A resistance heating layer 3 is formed in the center of the molten metal passage of the nozzle, and the resistance heating layer 3 is heated by supplying electricity from a heating power source 5 through a lead wire 4 connected to the nozzle body 1.
is starting to develop a fever. Furthermore, an insulating layer 6 is formed inside the molten metal channel of the nozzle. This not only prevents the temperature drop due to heat transfer of the molten metal passing through the nozzle, but also the problem of the molten metal solidifying inside the nozzle during pouring due to the temperature drop of the molten metal, making it impossible to cast. Moreover, the action of the insulating layer 4 completely prevents the current from flowing into the molten metal when the molten metal passes through the nozzle. The nozzle body 1 and the resistance heating layer 3 are made of Al2O3, SiO2, ZrO.
2. 1 to 60% by weight of carbon such as carbon black, graphite, and carbide such as SiC are blended into a refractory made of MgO, etc., and the electrical resistivity is 10.
The nozzle body 1 is the one with low electrical resistivity (10-2 to 10-3 ΩCm), and the one with high electrical resistivity (10-2 to 10 ΩCm) is used.
m) is the resistance heating layer 3.
絶縁層６としては、電気抵抗率が１σ〜１０７ΩＣｍの
粘土質、アルミナ質、珪石質、ジルコン質、マグネシア
質、窒化物質等からなる耐火物を用いる。As the insulating layer 6, a refractory made of clay, alumina, silica, zircon, magnesia, nitride, etc. and having an electrical resistivity of 1σ to 10 7 ΩCm is used.
この発明のノズルはタンデイツシユ浸漬ノズル、タンデ
イツシユノズル、鋳鍋ノズル等種々の鋳込ノズルに適用
できることは云うまでもない。It goes without saying that the nozzle of the present invention can be applied to various casting nozzles such as a tundish immersion nozzle, a tundish nozzle, and a casting pot nozzle.
以上説明したように、この発明によれば、ノズルを通過
する溶融金属に、より近い部分に、しかも溶鋼の伝熱放
散方向と直交する方向に発熱部が存在するので、局部発
熱だけで溶鋼の伝熱による温度降下の防止、あるいは溶
鋼の加熱が行え、従つて、発熱に要する電力を軽減でき
、しかも、導電性をもたせる為に混入した炭素又はＳｉ
Ｃ等の特性ににより、通電による常温からのノズルの加
熱が行え、また、通電用のリード線をノズル下部にまと
めて接続てき、更に、絶縁層の作用により、通電電流が
溶融金属中に流れるのを完全に防止できる等、種々の有
用な効果がもたらされる。As explained above, according to the present invention, there is a heat generating part closer to the molten metal passing through the nozzle and in a direction perpendicular to the direction of heat transfer and dissipation of the molten steel. It is possible to prevent temperature drop due to heat transfer or to heat molten steel, thus reducing the power required for heat generation.
Due to the characteristics such as C, it is possible to heat the nozzle from room temperature by applying electricity, and the lead wires for conducting electricity can be connected together at the bottom of the nozzle, and furthermore, due to the action of the insulating layer, the current flows into the molten metal. Various useful effects can be brought about, such as being able to completely prevent this.
第１図は、この発明のノズルの縦断面図である。
図面において、１・・・・・・ノズル本体、２・・・・
・・溝、３・・・・・・抵抗発熱層、４・・・・・・リ
ード線、５・・・・・・加熱電源、６・・・・・・絶縁
層。FIG. 1 is a longitudinal sectional view of the nozzle of the present invention. In the drawings, 1...nozzle body, 2...
... Groove, 3 ... Resistance heating layer, 4 ... Lead wire, 5 ... Heating power supply, 6 ... Insulating layer.
Claims (1)
ズルにおいて、良導体の耐火物で構成された鋳込ノズル
本体が絶縁用の溝によつて２分割され、鋳込ノズルの溶
融金属通路中央部に抵抗発熱層が形成され、しかも、前
記溶融金属通路内側には絶縁層が形成され、前記鋳込ノ
ズル本体から通電することによつて、前記抵抗発熱層を
加熱可能にしてなることを特徴とする溶融金属用鋳込ノ
ズル。1. In a casting nozzle used for tundishes, etc. for molten metal, the casting nozzle body made of a refractory material with good conductivity is divided into two by an insulating groove, and a resistance A heating layer is formed, and an insulating layer is formed inside the molten metal passage, and the resistance heating layer can be heated by applying electricity from the casting nozzle body. Casting nozzle for metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55150840A JPS6047034B2 (en) | 1980-10-29 | 1980-10-29 | Casting nozzle for molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55150840A JPS6047034B2 (en) | 1980-10-29 | 1980-10-29 | Casting nozzle for molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5775266A JPS5775266A (en) | 1982-05-11 |
| JPS6047034B2 true JPS6047034B2 (en) | 1985-10-19 |
Family
ID=15505516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55150840A Expired JPS6047034B2 (en) | 1980-10-29 | 1980-10-29 | Casting nozzle for molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6047034B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10132575C1 (en) * | 2001-07-10 | 2002-07-04 | Heraeus Electro Nite Int | Refractory outlet used in the wall of a metallurgical vessel for steel melts has electrodes made from metal having a high melting point and/or formed from one of its oxides |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546816A (en) * | 1977-06-20 | 1979-01-19 | Kobe Steel Ltd | Prevention of pouriggnozzle blockade |
-
1980
- 1980-10-29 JP JP55150840A patent/JPS6047034B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546816A (en) * | 1977-06-20 | 1979-01-19 | Kobe Steel Ltd | Prevention of pouriggnozzle blockade |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5775266A (en) | 1982-05-11 |
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