JPH0740011A - Plasma heating device for molten steel in tundish - Google Patents
Plasma heating device for molten steel in tundishInfo
- Publication number
- JPH0740011A JPH0740011A JP5208189A JP20818993A JPH0740011A JP H0740011 A JPH0740011 A JP H0740011A JP 5208189 A JP5208189 A JP 5208189A JP 20818993 A JP20818993 A JP 20818993A JP H0740011 A JPH0740011 A JP H0740011A
- Authority
- JP
- Japan
- Prior art keywords
- plasma torch
- molten steel
- plasma
- tundish
- heating
- 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.)
- Withdrawn
Links
Landscapes
- Discharge Heating (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、取鍋から溶鋼を受け鋳
型に注入するタンディッシュ内の溶鋼の加熱用に使用す
るプラズマ加熱装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma heating apparatus used for heating molten steel in a tundish for receiving molten steel from a ladle and pouring it into a mold.
【０００２】[0002]
【従来の技術】連続鋳造設備におけるタンディッシュ内
溶鋼温度は、鋳込み初期や末期及び取鍋交換時には低下
が避けられない。この温度低下は非金属介在物や偏析等
の鋳片品質に悪影響を与える。2. Description of the Related Art The temperature of molten steel in a tundish in a continuous casting facility is inevitably lowered at the beginning of casting, at the end of casting, and when ladle is replaced. This temperature decrease adversely affects the quality of the slab such as non-metallic inclusions and segregation.
【０００３】この問題に応える技術としてタンディッシ
ュでの溶鋼加熱技術があり、「新日鉄技報」第３４５号
（１９９２）２３〜２９頁に記載されているように、誘
導加熱及びプラズマ加熱の二つの方式が採用されてい
る。As a technique for responding to this problem, there is a molten steel heating technique in a tundish. As described in “Nippon Steel Technical Report” No. 345 (1992), pages 23 to 29, two types of induction heating and plasma heating are available. The method is adopted.
【０００４】これらの加熱装置を既存の連続鋳造設備に
導入する際の設備制約として、誘導加熱についてはタン
ディッシュ内外の水平方向に充分な空間が必要であり、
インダクター取り付けによるタンディッシュ容量の減少
があるのに対し、プラズマ加熱の場合はタンディッシュ
内に加熱室を設け、その上方にプラズマトーチを設置す
るのみでタンディッシュ容量に制約を与えない。このた
め一般的にはプラズマ加熱の方が装置の小型化が可能
で、また装置がタンディッシュや取鍋と完全に分離して
いるため保守性が良い。As a facility restriction when introducing these heating devices into an existing continuous casting facility, a sufficient space in the horizontal direction inside and outside the tundish is required for induction heating.
While there is a decrease in the tundish capacity due to the installation of the inductor, in the case of plasma heating, a heating chamber is provided in the tundish and a plasma torch is installed above it, but there is no restriction on the tundish capacity. For this reason, generally, plasma heating can reduce the size of the device, and since the device is completely separated from the tundish and the ladle, the maintainability is good.
【０００５】プラズマアークの出力はアーク電流とアー
ク電圧の積で表され、一般にプラズマの安定性確保のた
め電流は外部の電源で電流制御を行い、設定値として与
えられる。従って、アーク電流一定の条件で出力増大を
図るにはアーク電圧を高める必要がある。タンディッシ
ュ溶鋼加熱で用いるアーク電圧は、雰囲気条件が一定な
らばアーク長に比例して増加する。The output of the plasma arc is represented by the product of the arc current and the arc voltage. Generally, in order to ensure the stability of the plasma, the current is controlled by an external power source and given as a set value. Therefore, in order to increase the output under the condition that the arc current is constant, it is necessary to increase the arc voltage. The arc voltage used to heat the molten steel in the tundish increases in proportion to the arc length if the atmospheric conditions are constant.
【０００６】従来の代表的なプラズマ加熱装置が「新日
鉄技報」第３４５号（１９９２）２４頁に記載されてい
る。このプラズマ加熱装置はタンディッシュ内に加熱室
を設置し、その上部に長円筒上のプラズマトーチとその
移動装置及び冷却水配管・ガス配管・通電用ケーブルの
ためのケーブルベアを設置する。プラズマトーチは移動
装置によって位置決めされる。溶鋼加熱時には加熱室に
プラズマトーチを挿入し、溶鋼表面の高さに合わせて移
動装置によりプラズマトーチを上下方向に直線運動さ
せ、プラズマトーチ先端にあるカソード電極の位置を変
えてアーク長を調整し出力の調整を行う。A typical conventional plasma heating apparatus is described in "Nippon Steel Technical Report" No. 345 (1992), page 24. In this plasma heating device, a heating chamber is installed in a tundish, and a plasma torch on a long cylinder, its moving device, a cooling water pipe, a gas pipe, and a cable bear for an energizing cable are installed on the heating chamber. The plasma torch is positioned by the moving device. When heating the molten steel, insert a plasma torch into the heating chamber, move the plasma torch in a vertical direction in line with the height of the molten steel surface, and adjust the arc length by changing the position of the cathode electrode at the tip of the plasma torch. Adjust the output.
【０００７】[0007]
【発明が解決しようとする課題】プラズマ加熱を効果的
に行うためには、溶鋼の均一な加熱が重要であり、これ
にはタンディッシュ内の適正な位置で加熱を行う必要が
ある。このようにプラズマ加熱装置を適正位置に設置す
るためには、タンディッシュ内加熱適正位置の上方向に
ある程度の空間が必要である。しかし、既存の連続鋳造
設備に導入する場合、タンディッシュ形状及び取鍋との
取合等により適正位置に設置するための空間を確保出来
ないことが多い。そのためプラズマ加熱装置を導入でき
なかったり、導入するために多大な改造費や工事期間が
必要になったり、また適正位置に設置出来ず効果が低減
するといった問題点がある。In order to effectively perform plasma heating, it is important to uniformly heat the molten steel, which requires heating at an appropriate position in the tundish. As described above, in order to install the plasma heating device at an appropriate position, a certain amount of space is required above the appropriate heating position in the tundish. However, when it is installed in the existing continuous casting equipment, it is often impossible to secure a space for installing it at an appropriate position due to the tundish shape and the connection with the ladle. Therefore, there are problems that the plasma heating device cannot be introduced, a large amount of modification and construction period are required to introduce the plasma heating device, and it cannot be installed in an appropriate position, so that the effect is reduced.
【０００８】[0008]
【課題を解決するための手段】本発明の要旨は以下の通
りである。The gist of the present invention is as follows.
【０００９】 タンディッシュ内に設けた加熱室にプ
ラズマトーチを挿入し、プラズマトーチを陰極にし溶鋼
を陽極にしてその間にプラズマアークを生起させ、発生
した熱を溶鋼の昇温に利用するプラズマ加熱装置におい
て、プラズマトーチは水平状態に配置し、タンディッシ
ュ内の加熱室に適宜進退自在に構成すると共に、該プラ
ズマトーチの先端部をその基軸部の軸芯と直交するよう
に水平方向に曲げ、かつその最先端部を溶鋼表面側であ
る下方向に曲げて形成し、更に該プラズマトーチの基軸
部をその軸芯を中心に回転自在に構成してプラズマトー
チ最先端部のカソード電極と溶鋼表面との距離を調整自
在にしたことを特徴とするタンディッシュ溶鋼用プラズ
マ加熱装置。A plasma heating device in which a plasma torch is inserted into a heating chamber provided in a tundish, the plasma torch is used as a cathode, and the molten steel is used as an anode to generate a plasma arc therebetween, and the generated heat is used to raise the temperature of the molten steel. In the above, the plasma torch is arranged in a horizontal state, and is configured to be capable of advancing and retreating appropriately in the heating chamber in the tundish, and the tip end portion of the plasma torch is bent in the horizontal direction so as to be orthogonal to the axis of the base shaft portion, The tip of the plasma torch is formed by bending downward, which is the surface side of the molten steel, and the base shaft of the plasma torch is configured to be rotatable around its axis. The plasma heating device for molten steel in the tundish, characterized in that the distance between the two can be adjusted.
【００１０】 タンディッシュ内に設けた加熱室にプ
ラズマトーチを挿入し、プラズマトーチを陰極にし溶鋼
を陽極にしてその間にプラズマアークを生起させ、発生
した熱を溶鋼の昇温に利用するプラズマ加熱装置におい
て、プラズマトーチは水平状態に配置し、タンディッシ
ュ内の加熱室に適宜進退自在に構成すると共に、プラズ
マトーチの最先端部を溶鋼表面側である下方向に曲げて
形成し、更に該プラズマトーチの基軸部を基軸部の軸芯
と直交する回転軸を中心として上下方向に揺動自在に構
成してプラズマトーチ最先端部のカソード電極と溶鋼表
面との距離を調整自在にしたことを特徴とするタンディ
ッシュ溶鋼用プラズマ加熱装置。A plasma heating device in which a plasma torch is inserted into a heating chamber provided in a tundish, a plasma torch is used as a cathode, molten steel is used as an anode, and a plasma arc is generated between them, and the generated heat is used to raise the temperature of the molten steel. In the above, the plasma torch is arranged horizontally, and is configured to be able to move forward and backward in the heating chamber in the tundish as appropriate, and the leading edge of the plasma torch is formed by bending the molten steel surface side downward, and further forming the plasma torch. It is characterized in that the base shaft part of is configured to be swingable in the vertical direction around a rotary shaft that is orthogonal to the axis of the base shaft part so that the distance between the cathode electrode at the most advanced part of the plasma torch and the molten steel surface can be adjusted. Tundish Plasma heating device for molten steel.
【００１１】[0011]
【作用】本発明のプラズマ加熱装置は、溶鋼加熱時には
プラズマトーチを水平方向から挿入し、その先端部と最
先端部をタンディッシュ内の加熱室上部に配置する。そ
して、本発明の第一の装置では、タンディッシュ内の溶
鋼表面の高さに合わせてプラズマトーチ全体を基軸部の
軸芯を回転中心としてアーク長調整角度だけ回転させ
る。また、本発明の第二の装置では、タンディッシュ内
の溶鋼表面の高さに合わせてプラズマトーチ全体を基軸
部の軸芯と直交する回転軸を中心としてアーク長調整角
度だけ上下方向に揺動させる。このようにして、溶鋼表
面とプラズマトーチの最先端部にあるカソード電極との
間の距離を換えることでアーク長の調整、即ち出力の調
整を行う。In the plasma heating apparatus of the present invention, the plasma torch is inserted from the horizontal direction at the time of heating the molten steel, and the tip and the tip of the plasma torch are arranged above the heating chamber in the tundish. Then, in the first apparatus of the present invention, the entire plasma torch is rotated by the arc length adjustment angle with the axis of the base shaft as the center of rotation in accordance with the height of the molten steel surface in the tundish. Further, in the second device of the present invention, the entire plasma torch is vertically swung up and down by the arc length adjustment angle around the rotation axis orthogonal to the axis of the base shaft part according to the height of the molten steel surface in the tundish. Let In this way, the arc length, that is, the output, is adjusted by changing the distance between the molten steel surface and the cathode electrode at the tip of the plasma torch.
【００１２】本発明の装置は、いずれもプラズマトーチ
を水平状態に配置しているため、タンディッシュと水平
方向の位置にプラズマトーチの挿入、回転又は揺動に必
要な駆動系を設置できる。これにより、タンディッシュ
の上部にはプラズマトーチの先端部と最先端部しか挿入
されないため、プラズマトーチ高さより少し大きい隙間
があればプラズマ加熱を行うことができる。このよう
に、本発明の装置はタンディッシュの上方向に広い空間
を必要とせず、比較的余裕のあるタンディッシュの水平
方向の空間を利用してプラズマ加熱を行うことを可能に
する。In each of the devices of the present invention, the plasma torch is arranged in a horizontal state, so that a drive system required for inserting, rotating or swinging the plasma torch can be installed at a position in the horizontal direction with respect to the tundish. As a result, only the tip and the tip of the plasma torch are inserted into the upper part of the tundish, so that plasma heating can be performed if there is a gap slightly larger than the height of the plasma torch. As described above, the apparatus of the present invention does not require a large space above the tundish, and makes it possible to perform plasma heating using the horizontal space of the tundish having a relatively large margin.
【００１３】[0013]
【実施例】本発明の第一の装置の構成と動作を図１と図
２を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration and operation of the first device of the present invention will be described with reference to FIGS.
【００１４】プラズマトーチ１は水平状態に配置する。
プラズマトーチ先端部３はプラズマトーチ基軸部２の軸
芯ａと直交するように水平方向に曲げ、かつプラズマト
ーチ最先端部４を溶鋼表面１７側である下方向に曲げて
形成する。最先端部４の軸芯ｃの先にはカソード電極５
が取り付けられており、基軸部２には通電用ブスバー９
と冷却水及びガス供給用継手１０が取り付けられてい
る。プラズマトーチ１全体は、基軸部２を支持部８で支
持することで拘束されている。支持部８はたとえばプラ
ンマブロック等で構成されており、軸芯ａを中心に回転
自在とする。そして軸芯ａを中心にアーク長調整角度γ
だけ回転させるため、たとえば電動機駆動の回転装置６
を設置する。支持部８及び回転装置６は、プラズマトー
チ１と電気的に絶縁されている。そしてこれらを上設す
るため、たとえば台車構造の挿入装置７をタンディッシ
ュ１３と水平方向の位置に設置する。挿入装置７の下部
にはガイドレール１１を置き、挿入装置７の移動方向Ｘ
に沿って冷却水配管、ガス配管、通電用ケーブルのため
のケーブルベア１２を配設する。この場合、回転装置６
として油圧シリンダー等を使用しても同様の動作を得る
ことができる。The plasma torch 1 is arranged horizontally.
The plasma torch tip portion 3 is formed by bending the plasma torch base shaft portion 2 in a horizontal direction so as to be orthogonal to the axis a of the plasma torch base shaft portion 2, and bending the plasma torch tip portion 4 downward in the molten steel surface 17 side. Cathode electrode 5 is provided at the tip of the axis c of the tip portion 4.
Is attached, and the bus bar 9 for energization is attached to the base shaft portion 2.
A cooling water and gas supply joint 10 is attached. The entire plasma torch 1 is restrained by supporting the base shaft portion 2 with a support portion 8. The support portion 8 is composed of, for example, a plummer block or the like, and is rotatable about an axis a. And the arc length adjustment angle γ around the axis a
For example, a rotating device 6 driven by an electric motor
Set up. The support 8 and the rotating device 6 are electrically insulated from the plasma torch 1. Then, in order to install them, for example, the trolley structure insertion device 7 is installed at a position in the horizontal direction with respect to the tundish 13. A guide rail 11 is placed below the insertion device 7 so that the insertion device 7 moves in the X direction.
A cooling water pipe, a gas pipe, and a cable bear 12 for a current-carrying cable are arranged along the above. In this case, the rotating device 6
The same operation can be obtained by using a hydraulic cylinder or the like.
【００１５】溶鋼加熱を行う場合は、挿入装置７をタン
ディッシュ１３の方へ水平移動させ、プラズマトーチ最
先端部４と先端部３をタンディッシュ１３の上方の狭い
空間、たとえば取鍋下面１６とタンディッシュ１３内に
設けた加熱室１５の上面の隙間Ｌ2 に水平方向より挿入
し、プラズマトーチ最先端部４を加熱室１５に設けた開
口位置まで移動させる。その位置で回転装置６により軸
芯ａを中心にして反時計方向に回転させることで、加熱
室１５の開口よりプラズマトーチ最先端部４を挿入す
る。そして溶鋼表面１７の高さに合わせて回転装置６に
よりアーク長調整角度γの範囲でさらに回転させる。そ
して溶鋼表面１７とカソード電極５との間の距離を調整
し、着火した後にアーク長をＬ3 〜Ｌ4 の範囲で変える
ことにより出力を調整する。プラズマトーチ最先端部４
の曲げ角度βは、プラズマアーク１８の安定性の点か
ら、アーク長調整角度γの回転範囲内では溶鋼表面１７
に対するカソード電極５の傾き角度αが１５°以下とな
るよう決定することが望ましい。When heating the molten steel, the insertion device 7 is moved horizontally toward the tundish 13, and the leading edge portion 4 and the tip portion 3 of the plasma torch are placed above the tundish 13 in a narrow space, for example, the ladle lower surface 16. The plasma torch tip portion 4 is inserted horizontally into the gap L 2 on the upper surface of the heating chamber 15 provided in the tundish 13 and moved to the opening position provided in the heating chamber 15. The plasma torch tip portion 4 is inserted from the opening of the heating chamber 15 by rotating counterclockwise around the axis a by the rotating device 6 at that position. Then, according to the height of the molten steel surface 17, the rotating device 6 further rotates within the range of the arc length adjusting angle γ. Then, the distance between the molten steel surface 17 and the cathode electrode 5 is adjusted, and after ignition, the arc length is changed within the range of L 3 to L 4 to adjust the output. Plasma torch cutting edge 4
The bending angle β of the molten steel surface 17 is within the rotation range of the arc length adjustment angle γ from the viewpoint of the stability of the plasma arc 18.
It is desirable that the inclination angle α of the cathode electrode 5 with respect to is determined to be 15 ° or less.
【００１６】本発明の第二の装置の構成と動作を図３を
参照して説明する。The configuration and operation of the second device of the present invention will be described with reference to FIG.
【００１７】プラズマトーチ１は水平状態に配置する。
プラズマトーチ最先端４は、溶鋼表面１７側である下方
向に曲げて形成する。最先端部４の軸芯ｃの先にはカソ
ード電極５が取り付けられており、基軸部２には通電用
ブスバー９と冷却水及びガス供給用継手１０が取り付け
られている。基軸部２には、その軸芯ａと直交する揺動
Ｚのための回転軸１９を設ける。プラズマトーチ１全体
は、回転軸１９を支持部８で支持することで拘束されて
いる。支持部８はたとえばプランマブロック等で構成さ
れており、回転軸１９を中心に揺動自在とする。そして
回転軸１９を中心にアーク長調整角度γだけ上下方向に
揺動させるため、たとえば電動機駆動の揺動装置２０を
設置する。支持部８及び揺動装置２０は、プラズマトー
チ１と電気的に絶縁されている。そしてこれらを上設す
るため、たとえば台車構造の挿入装置７をタンディッシ
ュ１３と水平方向の位置に設置する。挿入装置７の下部
にはガイドレール１１を置き、挿入装置７の移動方向Ｘ
に沿って冷却水配管、ガス配管、通電用ケーブルのため
のケーブルベア（本図には図示しない）を配設する。こ
の場合、揺動装置２０として油圧シリンダー等を使用し
ても同様の動作を得ることができる。The plasma torch 1 is arranged horizontally.
The plasma torch tip 4 is formed by bending downward on the molten steel surface 17 side. A cathode electrode 5 is attached to the tip of the shaft core c of the most distal end portion 4, and a bus bar 9 for energization and a joint 10 for cooling water and gas supply are attached to the base shaft portion 2. The base shaft portion 2 is provided with a rotary shaft 19 for swinging Z that is orthogonal to the axis a of the base shaft portion 2. The entire plasma torch 1 is constrained by supporting the rotating shaft 19 by the supporting portion 8. The support portion 8 is composed of, for example, a plummer block or the like, and can swing around a rotation shaft 19. Then, in order to swing up and down about the rotating shaft 19 by the arc length adjusting angle γ, for example, a swing device 20 driven by an electric motor is installed. The support portion 8 and the swinging device 20 are electrically insulated from the plasma torch 1. Then, in order to install them, for example, the trolley structure insertion device 7 is installed at a position in the horizontal direction with respect to the tundish 13. A guide rail 11 is placed below the insertion device 7 so that the insertion device 7 moves in the X direction.
Along with, cooling water pipes, gas pipes, and cable bears (not shown in the figure) for energizing cables are arranged. In this case, the same operation can be obtained even if a hydraulic cylinder or the like is used as the rocking device 20.
【００１８】溶鋼加熱を行う場合は、挿入装置７をタン
ディッシュ（本図には図示しない）の方へ水平移動さ
せ、プラズマトーチ最先端部４をタンディッシュの上方
の狭い空間、たとえば取鍋（本図には図示しない）の下
面とタンディッシュ内に設けた加熱室（本図には図示し
ない）の上面の隙間に水平方向より挿入し、プラズマト
ーチ最先端部４を加熱室に設けた開口位置まで移動させ
る。その位置で揺動装置２０により回転軸１９を中心に
して下方に揺動させることで、加熱室の開口よりプラズ
マトーチ最先端部４を挿入する。そして溶鋼表面１７の
高さに合わせて揺動装置２０によりアーク長調整角度γ
の範囲で上下方向に揺動させる。そして溶鋼表面１７と
カソード電極５との間の距離を調整し、着火した後にア
ーク長をＬ3 〜Ｌ4 の範囲で変えることにより出力を調
整する。プラズマトーチ最先端部４の曲げ角度βは、プ
ラズマアーク１８の安定性の点から、アーク長調整角度
γの揺動範囲内では溶鋼表面１７に対するカソード電極
５の傾き角度αが１５°以下となるよう決定することが
望ましい。When heating the molten steel, the insertion device 7 is moved horizontally toward the tundish (not shown in the figure), and the leading end portion 4 of the plasma torch is placed in a narrow space above the tundish, for example, a ladle ( An opening formed by horizontally inserting the plasma torch tip portion 4 into the gap between the lower surface of the plasma torch (not shown in the figure) and the upper surface of the heating chamber (not shown in the figure) provided in the tundish. Move to position. At that position, the tip end portion 4 of the plasma torch is inserted from the opening of the heating chamber by swinging downward about the rotary shaft 19 by the swinging device 20. Then, according to the height of the molten steel surface 17, the arc length adjusting angle γ is adjusted by the rocking device 20.
Swing vertically in the range of. Then, the distance between the molten steel surface 17 and the cathode electrode 5 is adjusted, and after ignition, the arc length is changed within the range of L 3 to L 4 to adjust the output. From the viewpoint of the stability of the plasma arc 18, the bending angle β of the most advanced portion 4 of the plasma torch is such that the inclination angle α of the cathode electrode 5 with respect to the molten steel surface 17 is 15 ° or less within the swing range of the arc length adjustment angle γ. Should be decided.
【００１９】[0019]
【発明の効果】本発明のプラズマ加熱装置は、既存の連
続鋳造設備に導入する際の制約条件が少ないため、既存
設備の改造費の低減及び工事期間の短縮が可能になる。
また、設備制約条件が少なく、加熱位置を自由に選択で
きるため、最適位置でのプラズマ加熱が可能となり、冶
金的効果が向上する。EFFECTS OF THE INVENTION The plasma heating apparatus of the present invention has few constraint conditions when it is introduced into existing continuous casting equipment, so that it is possible to reduce the cost for modifying the existing equipment and shorten the construction period.
In addition, since there are few equipment constraints and the heating position can be freely selected, plasma heating at the optimum position becomes possible and the metallurgical effect is improved.
【図１】本発明のプラズマ加熱装置を示す図である。FIG. 1 is a diagram showing a plasma heating apparatus of the present invention.
【図２】図１のＡ−Ａ断面を示す図である。FIG. 2 is a view showing a cross section taken along the line AA of FIG.
【図３】本発明のプラズマ加熱装置を示す図である。FIG. 3 is a diagram showing a plasma heating apparatus of the present invention.
１ プラズマトーチ ２ プラズマトーチ基軸部 ３ プラズマトーチ先端部 ４ プラズマトーチ最先端部 ５ カソード電極 ６ 回転装置 ７ 挿入装置 ８ 支持部 ９ 通電用ブスバー １０ 冷却水及びガス供給用継手 １１ ガイドレール １２ ケーブルベア １３ タンディッシュ １４ 取鍋 １５ 加熱室 １６ 取鍋下面 １７ 溶鋼表面 １８ プラズマアーク １９ 回転軸 ２０ 揺動装置 ａ プラズマトーチ基軸部の軸芯 ｂ プラズマトーチ先端部の軸芯 ｃ プラズマトーチ最先端部の軸芯 Ｌ1 プラズマトーチ高さ Ｌ2 取鍋下面と加熱室上面の隙間 Ｌ3 最大アーク長 Ｌ4 最小アーク長 α 溶鋼表面に対するカソード電極の傾き角度 β プラズマトーチ最先端部の曲げ角度 γ アーク長調整角度 Ｘ 挿入装置の移動方向 Ｙ 回転装置の回転方向 Ｚ 揺動装置の揺動方向DESCRIPTION OF SYMBOLS 1 Plasma torch 2 Plasma torch base shaft part 3 Plasma torch tip part 4 Plasma torch tip part 5 Cathode electrode 6 Rotating device 7 Inserting device 8 Support part 9 Energizing bus bar 10 Cooling water and gas supply joint 11 Guide rail 12 Cable bear 13 Tundish 14 Ladle 15 Heating chamber 16 Ladle lower surface 17 Molten steel surface 18 Plasma arc 19 Rotating shaft 20 Oscillating device a Plasma torch base shaft shaft core b Plasma torch tip shaft core c Plasma torch tip shaft core L 1 Plasma torch height L 2 Gap between bottom of ladle and top of heating chamber L 3 Maximum arc length L 4 Minimum arc length α Inclination angle of cathode electrode with respect to molten steel surface β Bending angle of plasma torch tip end point γ Arc length adjustment angle X moving direction of inserting device Y rotating direction of rotating device Z swinging direction of rocking device
Claims (2)
ズマトーチを挿入し、プラズマトーチを陰極にし溶鋼を
陽極にしてその間にプラズマアークを生起させ、発生し
た熱を溶鋼の昇温に利用するプラズマ加熱装置におい
て、プラズマトーチは水平状態に配置し、タンディッシ
ュ内の加熱室に適宜進退自在に構成すると共に、該プラ
ズマトーチの先端部をその基軸部の軸芯と直交するよう
に水平方向に曲げ、かつその最先端部を溶鋼表面側であ
る下方向に曲げて形成し、更に該プラズマトーチの基軸
部をその軸芯を中心に回転自在に構成してプラズマトー
チ最先端部のカソード電極と溶鋼表面との距離を調整自
在にしたことを特徴とするタンディッシュ溶鋼用プラズ
マ加熱装置。1. A plasma in which a plasma torch is inserted into a heating chamber provided in a tundish, a plasma torch is used as a cathode and molten steel is used as an anode to generate a plasma arc between them, and the generated heat is used to raise the temperature of the molten steel. In the heating device, the plasma torch is arranged in a horizontal state and is configured to be movable back and forth in the heating chamber in the tundish as appropriate, and the tip end of the plasma torch is bent horizontally so as to be orthogonal to the axis of the base shaft. And the tip portion of the plasma torch is bent downward, which is the surface side of the molten steel, and the base shaft portion of the plasma torch is configured to be rotatable around its axis, and the cathode electrode and molten steel at the tip portion of the plasma torch are formed. Plasma heating device for molten steel in tundish, characterized in that the distance to the surface is adjustable.
ズマトーチを挿入し、プラズマトーチを陰極にし溶鋼を
陽極にしてその間にプラズマアークを生起させ、発生し
た熱を溶鋼の昇温に利用するプラズマ加熱装置におい
て、プラズマトーチは水平状態に配置し、タンディッシ
ュ内の加熱室に適宜進退自在に構成すると共に、プラズ
マトーチの最先端部を溶鋼表面側である下方向に曲げて
形成し、更に該プラズマトーチの基軸部を基軸部の軸芯
と直交する回転軸を中心として上下方向に揺動自在に構
成してプラズマトーチ最先端部のカソード電極と溶鋼表
面との距離を調整自在にしたことを特徴とするタンディ
ッシュ溶鋼用プラズマ加熱装置。2. A plasma in which a plasma torch is inserted into a heating chamber provided in a tundish, a plasma torch is used as a cathode and molten steel is used as an anode to generate a plasma arc between them, and the generated heat is used to raise the temperature of the molten steel. In the heating device, the plasma torch is arranged in a horizontal state, and is configured to be capable of advancing and retreating appropriately in the heating chamber in the tundish, and the leading end of the plasma torch is formed by bending the molten steel surface side downward, and further The basic axis of the plasma torch is configured to be vertically swingable about a rotary shaft that is orthogonal to the axis of the basic axis, and the distance between the cathode electrode at the tip of the plasma torch and the molten steel surface is adjustable. Characteristic plasma heating device for molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5208189A JPH0740011A (en) | 1993-08-02 | 1993-08-02 | Plasma heating device for molten steel in tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5208189A JPH0740011A (en) | 1993-08-02 | 1993-08-02 | Plasma heating device for molten steel in tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0740011A true JPH0740011A (en) | 1995-02-10 |
Family
ID=16552143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5208189A Withdrawn JPH0740011A (en) | 1993-08-02 | 1993-08-02 | Plasma heating device for molten steel in tundish |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740011A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007275914A (en) * | 2006-04-04 | 2007-10-25 | Nippon Steel Corp | Plasma heating apparatus of tundish |
| CN111136253A (en) * | 2020-01-13 | 2020-05-12 | 北京科技大学 | Plasma heating method and plasma heating system for tundish molten steel |
-
1993
- 1993-08-02 JP JP5208189A patent/JPH0740011A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007275914A (en) * | 2006-04-04 | 2007-10-25 | Nippon Steel Corp | Plasma heating apparatus of tundish |
| CN111136253A (en) * | 2020-01-13 | 2020-05-12 | 北京科技大学 | Plasma heating method and plasma heating system for tundish molten steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001003 |