JPH0686619B2 - Simple steel strip degassing equipment for bottom steel strip - Google Patents
Simple steel strip degassing equipment for bottom steel stripInfo
- Publication number
- JPH0686619B2 JPH0686619B2 JP60148876A JP14887685A JPH0686619B2 JP H0686619 B2 JPH0686619 B2 JP H0686619B2 JP 60148876 A JP60148876 A JP 60148876A JP 14887685 A JP14887685 A JP 14887685A JP H0686619 B2 JPH0686619 B2 JP H0686619B2
- Authority
- JP
- Japan
- Prior art keywords
- ladle
- lid
- molten steel
- steel strip
- degassing
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、出鋼時にN2ガス等の脱ガスを行い得るように
した炉底出鋼用簡易出鋼脱ガス装置に関するものであ
る。TECHNICAL FIELD The present invention relates to a simple tapping degassing apparatus for tapping at a furnace bottom, which is capable of degassing N 2 gas or the like during tapping.
［従来の技術］ 炉底出鋼を行い得るようにした従来の電気炉では、レー
ドル台車上に搭載したレードルを該レードル台車を走行
させることにより炉底出鋼部の下部所要位置に位置さ
せ、炉底出鋼部のゲートを開いて溶鋼を流出させ、レー
ドル内に排出させ、脱ガスが必要な場合には、溶鋼が受
入れられたレードルをレードル台車に搭載したまま吸引
脱ガス装置或いは循環脱ガス装置まで搬送し、該装置に
よって溶鋼中のN2ガス等の脱ガスを行っている。[Prior Art] In a conventional electric furnace that is capable of performing bottom-steel tapping, a ladle mounted on a ladle truck is moved to the ladle truck so as to be positioned at a required lower portion of the bottom-steel tapping section. When the molten steel is discharged by opening the gate of the steel bottom tapping part and discharged into the ladle, and when degassing is required, the ladle containing the molten steel is installed in the ladle carriage and the suction degassing device or circulation degasser is used. The gas is conveyed to a gas device, and the device degass N 2 gas in molten steel.
［発明が解決しようとする問題点］ しかしながら従来の吸引脱ガス装置或いは循環脱ガス装
置では溶鋼に乱流を与えて脱ガスを行うようにしている
ため、装置が大掛かりとなり且つ高価で、操作も繁雑と
なる、等の問題があった。[Problems to be Solved by the Invention] However, in the conventional suction degassing apparatus or circulating degassing apparatus, a turbulent flow is applied to molten steel to perform degassing, so the apparatus becomes large and expensive, and the operation is also difficult. There were problems such as being complicated.
本発明は、上記実情に鑑み、吸引脱ガス装置や循環脱ガ
ス装置よりも簡素で安価な装置により脱ガスを行い得る
ようにすることを目的としてなしたものである。The present invention has been made in view of the above circumstances, and an object thereof is to enable degassing with a device that is simpler and cheaper than a suction degassing device or a circulating degassing device.
［問題点を解決するための手段］ 本発明は昇降可能なレードルに、アーク炉の炉底出鋼部
の周囲に設けたシールカバーと密接し得るようにした蓋
を取り付け、該蓋に、前記アーク炉から溶鋼を直接レー
ドルへ排出する際に前記蓋内部空間を１トール程度に減
圧する真空装置を接続すると共に、溶鋼をレードルに排
出する際に溶鋼が通るよう前記蓋に形成された注入口に
開閉可能なカバーを取り付けた構成となっている。[Means for Solving the Problems] In the present invention, a lid that can be brought into close contact with a seal cover provided around a furnace bottom tapped portion of an arc furnace is attached to a vertically movable ladle, and the lid is provided with the above-mentioned. A vacuum device is connected to decompress the inner space of the lid to about 1 Torr when the molten steel is discharged directly from the arc furnace to the ladle, and an injection port formed in the lid so that the molten steel passes through when the molten steel is discharged to the ladle. It has a structure with a cover that can be opened and closed.
［作用］ 出鋼時には、蓋をシールカバーと密接させた状態で蓋内
部を約１トール程度に減圧し、炉底出鋼装置を開いて溶
鋼をアーク炉からレードル内へ直接排出するが、この際
炉底出鋼装置からレードル内へ落下する溶鋼は噴流とな
り、溶鋼中のN2ガス等のガスが脱ガスされ、脱ガス作業
後は、蓋に形成された注入口をカバーにより塞ぎ、溶鋼
を外気に曝すことなくレードルを搬送させることができ
る。[Operation] During tapping, the inside of the lid is depressurized to about 1 Torr while the lid is in close contact with the seal cover, and the furnace bottom tapping device is opened to discharge molten steel directly from the arc furnace into the ladle. At the same time, the molten steel falling from the furnace bottom tapping device into the ladle becomes a jet flow, and the gas such as N 2 gas in the molten steel is degassed.After the degassing work, the injection port formed in the lid is closed by the cover, The ladle can be transported without exposing the ladle to the outside air.
［実施例］ 以下、本発明の実施例を添付図面を参照しつつ説明す
る。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図及び第２図は本発明の一実施例で、製鋼用アーク
炉を構成する電気炉炉底１に、スライドゲート等を備え
た炉底出鋼装置２を配設すると共に該炉底出鋼装置２を
包囲するようシールカバー３を取付け、電気炉炉底１の
下部にレードル台車４移動用のレール５を敷設し、レー
ドル台車４に立設したトラニオンスタンド６の上部に竪
向きの流体圧シリンダ７を配設し、レードル８の側部に
突出させたトラニオン９をトラニオン受け10を介して前
記流体圧シリンダ７のピストンロッド7a上端によって支
持し得るようにする。1 and 2 show an embodiment of the present invention. An electric furnace bottom 1 constituting an arc furnace for steelmaking is provided with a furnace bottom tapping device 2 equipped with a slide gate and the like. A seal cover 3 is attached so as to surround the tapping device 2, a rail 5 for moving the ladle carriage 4 is laid under the electric furnace bottom 1, and a vertical direction is provided above the trunnion stand 6 standing on the ladle carriage 4. The fluid pressure cylinder 7 is provided so that the trunnion 9 protruding to the side of the ladle 8 can be supported by the upper end of the piston rod 7a of the fluid pressure cylinder 7 via the trunnion receiver 10.
レードル８の上部外周にリング状のフレーム11を固着し
て該フレーム11の上方に截頭円錐状の蓋12を配置し、該
蓋12の上面を前記シールカバー３の下面に密接し得るよ
うにし、蓋12に、該蓋12内の空間部圧力を約１トール程
度に減圧し得るよう排気ダクト13を介して真空ポンプ
（図示せず）を接続する。又蓋12上部には注入口を塞ぐ
ためのカバー16が流体圧シリンダ（図示せず）等によっ
て摺動し得るよう取付けられている。図中14は炉底出鋼
装置２から排出された溶鋼の噴流、15はレードル８内に
排出された溶鋼である。A ring-shaped frame 11 is fixed to the upper outer periphery of the ladle 8 and a frustoconical lid 12 is arranged above the frame 11 so that the upper surface of the lid 12 can be brought into close contact with the lower surface of the seal cover 3. A vacuum pump (not shown) is connected to the lid 12 via an exhaust duct 13 so that the pressure in the space inside the lid 12 can be reduced to about 1 Torr. A cover 16 for closing the inlet is attached to the top of the lid 12 so as to be slidable by a fluid pressure cylinder (not shown) or the like. In the figure, 14 is a jet of molten steel discharged from the furnace bottom tapping device 2, and 15 is molten steel discharged into the ladle 8.
電気炉炉底１から溶鋼をレードル８へ受け入れる場合に
は、レードル８が搭載されたレードル台車４をレール５
に沿い走行移動させ、レードル８を電気炉炉底１下部所
定位置に位置させ、流体圧シリンダ７によりレードル８
及び蓋12に上昇させ、蓋12の上面をシールカバー３の下
面に密接させ、真空ポンプを作動させて蓋12内の空間部
及びレードル８内空間部の圧力を約１トール程度に減圧
し、炉底出鋼装置２を開いて電気炉内の溶鋼を蓋12の注
入口からレードル８内へ排出させる。この際溶鋼は蓋12
内部が減圧されているためレードル８内へ落下する過程
で噴流14となり、溶鋼からN2ガスが脱ガスされる結果、
レードル８内へも排出された溶鋼15中の窒素成分は減少
する。When the molten steel is received from the bottom 1 of the electric furnace to the ladle 8, the ladle truck 4 on which the ladle 8 is mounted is mounted on the rail 5.
The ladle 8 is moved to a predetermined position below the bottom of the electric furnace bottom 1 and moved by the fluid pressure cylinder 7.
And the lid 12, and the upper surface of the lid 12 is brought into close contact with the lower surface of the seal cover 3, and the vacuum pump is operated to reduce the pressure in the space inside the lid 12 and the space inside the ladle 8 to about 1 Torr. The furnace bottom tapping device 2 is opened to discharge the molten steel in the electric furnace into the ladle 8 through the inlet of the lid 12. At this time, the molten steel has a lid 12
Since the inside is depressurized, it becomes a jet flow 14 in the process of falling into the ladle 8, and as a result of degassing N 2 gas from the molten steel,
The nitrogen component in the molten steel 15 also discharged into the ladle 8 decreases.
出鋼が完了すると流体圧シリンダ７によりレードル８及
び蓋12を下降させ、蓋12の注入口をカバー16により塞
ぎ、その後レードル８を載せたレードル台車４を次工程
へ搬送する。When the tapping is completed, the ladle 8 and the lid 12 are lowered by the fluid pressure cylinder 7, the inlet of the lid 12 is closed by the cover 16, and then the ladle truck 4 on which the ladle 8 is mounted is conveyed to the next step.
なお、本発明は上述の実施例に限定されるものではな
く、本発明の要旨を逸脱しない範囲内で種々変更を加え
得ることは勿論である。It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.
［発明の効果］ 本発明の炉底出鋼用簡易出鋼脱ガス装置によれば、従来
の真空脱ガス装置或いは循環脱ガス装置に比較して簡素
で安価な装置により溶鋼中からN2ガス等各種ガスの脱ガ
スができ、その結果溶鋼の品質を高めることができ、低
温脆性、時効を改善することが可能となり、また溶鋼を
空気に曝すことなくアーク炉から直接レードル内へ排出
することができるため、前記溶鋼の酸化を防止して溶鋼
の品質及び脱ガス処理の効率を保持することができ且
つ、作業を容易にして作業期間の短縮化を図ると共に安
全性を向上させることができ、更に脱ガス作業終了後、
レードルを下降させて蓋に形成された注入口をカバーに
より塞ぎ、前記レードルを移動させることができるの
で、レードル内の溶鋼を外気に曝すことなく次工程へ搬
送でき、脱ガス終了後の溶鋼の品質を保持することがで
きると共に、昇降可能なレードルにより、該レードルを
アーク炉炉底下部所要位置に位置させ、蓋を上面のシー
ルカバーの下面に密着させる作業を容易且つ迅速に行な
うことができるので、更に作業時間の短縮化を図ること
ができる等種々の優れた効果を奏し得る。[Effects of the Invention] According to the simple tapping degassing apparatus for bottom tapping steel of the present invention, N 2 gas from molten steel can be produced by a simple and inexpensive apparatus as compared with the conventional vacuum degassing apparatus or circulating degassing apparatus. Various gases can be degassed, and as a result, the quality of molten steel can be improved, low temperature brittleness and aging can be improved, and molten steel can be discharged directly from the arc furnace into the ladle without being exposed to air. Therefore, it is possible to prevent the molten steel from being oxidized and maintain the quality of the molten steel and the efficiency of degassing treatment, and it is possible to facilitate the work, shorten the work period, and improve the safety. After the degassing work,
Since the ladle is lowered to close the injection port formed in the lid with the cover and the ladle can be moved, it can be conveyed to the next step without exposing the molten steel in the ladle to the outside air, and the molten steel after degassing can be removed. The quality can be maintained, and the work of bringing the lid in close contact with the lower surface of the seal cover on the upper surface can be performed easily and quickly by using the movable ladle to position the ladle at a required position on the lower portion of the arc furnace bottom. Therefore, various excellent effects such as further reduction of working time can be achieved.
第１図は本発明の炉底出鋼用簡易出鋼脱ガス装置の説明
図、第２図は第１図の装置の蓋を塞ぐカバーの説明図で
ある。 図中１は電気炉炉底、２は炉底出鋼装置、３はシールカ
バー、４はレードル台車、７は流体圧シリンダ、８はレ
ードル、12は蓋、13は排気ダクトを示す。FIG. 1 is an explanatory view of a simple steel output degassing apparatus for hearth bottom steel output according to the present invention, and FIG. 2 is an explanatory view of a cover closing a lid of the apparatus of FIG. In the figure, 1 is a bottom of an electric furnace, 2 is a bottom tapping device, 3 is a seal cover, 4 is a ladle carriage, 7 is a fluid pressure cylinder, 8 is a ladle, 12 is a lid, and 13 is an exhaust duct.
Claims (1)
鋼部の周囲に設けたシールカバーと密接し得るようにし
た蓋を取り付け、該蓋に、前記アーク炉から溶鋼を直接
レードルへ排出する際に前記蓋内部空間を１トール程度
に減圧する真空装置を接続すると共に、溶鋼をレードル
に排出する際に溶鋼が通るよう前記蓋に形成された注入
口に開閉可能なカバーを取り付けたことを特徴とする炉
底出鋼用簡易出鋼脱ガス装置。1. A liftable ladle is provided with a lid which can be brought into close contact with a seal cover provided around a steel bottom tapped portion of an arc furnace, and the molten steel is directly attached to the ladle from the arc furnace to the lid. A vacuum device was connected to decompress the inner space of the lid to about 1 Torr at the time of discharging, and an openable cover was attached to the inlet formed in the lid so that the molten steel could pass through when discharging the molten steel to the ladle. A simple tapping degassing device for bottom tapping, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148876A JPH0686619B2 (en) | 1985-07-05 | 1985-07-05 | Simple steel strip degassing equipment for bottom steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148876A JPH0686619B2 (en) | 1985-07-05 | 1985-07-05 | Simple steel strip degassing equipment for bottom steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6210207A JPS6210207A (en) | 1987-01-19 |
| JPH0686619B2 true JPH0686619B2 (en) | 1994-11-02 |
Family
ID=15462697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60148876A Expired - Lifetime JPH0686619B2 (en) | 1985-07-05 | 1985-07-05 | Simple steel strip degassing equipment for bottom steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686619B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0765095B2 (en) * | 1990-06-28 | 1995-07-12 | 川崎製鉄株式会社 | Vacuum degassing tank bullion recovery device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243708A (en) * | 1975-10-02 | 1977-04-06 | Osaka Shinku Kiki Seisakusho:Kk | Method and apparatus for degassing molten metal |
| JPS5881910A (en) * | 1981-11-05 | 1983-05-17 | Sumitomo Metal Ind Ltd | Steel making apparatus |
| JPS6079700U (en) * | 1983-11-07 | 1985-06-03 | 大同特殊鋼株式会社 | Bottom tapping furnace |
-
1985
- 1985-07-05 JP JP60148876A patent/JPH0686619B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6210207A (en) | 1987-01-19 |
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