JPH09133475A - Slag-off opening door device of steel making arc furnace - Google Patents
Slag-off opening door device of steel making arc furnaceInfo
- Publication number
- JPH09133475A JPH09133475A JP31376295A JP31376295A JPH09133475A JP H09133475 A JPH09133475 A JP H09133475A JP 31376295 A JP31376295 A JP 31376295A JP 31376295 A JP31376295 A JP 31376295A JP H09133475 A JPH09133475 A JP H09133475A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- water
- door
- cooled
- opening
- 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.)
- Granted
Links
Classifications
-
- 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
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は製鋼用アーク炉の除
滓口ドアの開閉不良及び全閉不良を防止するための製鋼
用アーク炉の除滓口ドア装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag outlet door device for a steelmaking arc furnace for preventing defective opening and closing of the slag outlet door of a steelmaking arc furnace and defective closing of the slag outlet door.
【０００２】[0002]
【従来の技術】製鋼用アーク炉は、図３に一例を示す如
く原料としてのスクラップを装入する炉体１に炉蓋２を
開閉自在に配置し、該炉体１の底部に底部電極３を設置
すると共に、炉頂となる炉蓋２の中心部を貫通させて上
部電極４を配置し、炉体１内へ所要量のスクラップが装
入されると、装入されたスクラップと上記上部電極４と
の間にアークを発生させて生じたアーク熱によりスクラ
ップを溶解して溶鋼５を作るようにしてあり、更に、該
溶鋼５を出鋼させるために、炉体１の側壁部（炉壁部）
に外方へ突出するような出鋼口樋６を形成して該出鋼口
樋６の先端部下方に出鋼口７を設けると共に、上記出鋼
口樋６とは反対側の炉体１の側壁部に、スクラップを溶
解させた際に生じたスラグ９を炉外へ排出するための除
滓口８を設けた構成としてある。2. Description of the Related Art In a steelmaking arc furnace, a furnace lid 1 is openably and closably arranged in a furnace body 1 for charging scrap as a raw material as shown in FIG. 3, and a bottom electrode 3 is provided at the bottom of the furnace body 1. Is installed, the upper electrode 4 is arranged so as to penetrate the central portion of the furnace lid 2 which is the furnace top, and when a required amount of scrap is charged into the furnace body 1, the charged scrap and the upper part The scrap is melted by the arc heat generated by generating an arc between the electrode 4 and the molten steel 5, and further, in order to tap the molten steel 5, the side wall portion (furnace of the furnace body 1 Wall)
A steel tap gutter 6 that protrudes outwardly, a tap tap 7 is provided below the tip of the tap tap gutter 6, and the furnace body 1 on the side opposite to the tap tap gutter 6 is formed. The slag port 8 for discharging the slag 9 generated when the scrap is melted to the outside of the furnace is provided on the side wall of the.
【０００３】又、上記した如き製鋼用アーク炉における
除滓口８には、炉内にてスクラップを溶解しているとき
に上記除滓口８を閉塞しておくための除滓口ドア装置が
備えてある。従来より用いられている製鋼用アーク炉の
除滓口ドア装置は、図４（イ）（ロ）に示す如く、除滓
口８の両側における炉体１の外面にそれぞれガイドレー
ル１０を上下方向に設置し、除滓口８を閉塞するための
除滓口ドア１１を該左右のガイドレール１０に沿って上
下方向に移動自在に配置し、且つ該除滓口ドア１１を、
固定側に支持されたエアシリンダ１２のロッド先端にチ
ェーン１３を介して吊下げ支持させ、該チェーン１３を
ホイール１４に掛けて除滓口ドア１１を垂直に吊り下
げ、更に、上記除滓口ドア１１を下降させて除滓口８を
閉じた時に除滓口ドア１１を載せておくための受台１５
を、除滓口８の下側位置における炉体１の外壁に固定し
た構成としてある。Further, the slag opening 8 in the steelmaking arc furnace as described above is provided with a slag opening door device for closing the slag opening 8 while melting scrap in the furnace. It is prepared. As shown in FIGS. 4 (a) and 4 (b), the conventional slag opening door device for a steelmaking arc furnace has guide rails 10 vertically arranged on the outer surface of the furnace body 1 on both sides of the slag opening 8. Installed on the left and right, the slag opening door 11 for closing the slag opening 8 is movably arranged in the vertical direction along the left and right guide rails 10, and the slag opening door 11 is
The rod end of the air cylinder 12 supported on the fixed side is hung and supported via a chain 13, the chain 13 is hung on a wheel 14, and the slag door 11 is hung vertically. A pedestal 15 for holding the slag opening door 11 when the slag opening 8 is closed by lowering 11
Is fixed to the outer wall of the furnace body 1 at a position below the slag opening 8.
【０００４】上記において、炉体１内で作られた溶鋼５
を出鋼させようとする場合は、その前にスラグを排出さ
せるために、除滓口ドア装置のエアシリンダ１２を収縮
作動させてチェーン１３を介し除滓口ドア１１を引き上
げて除滓口８を必要量開いた後、炉体１を除滓口８側へ
傾動させて溶鋼５の表面にあるスラグ９を除滓口８を通
して炉外へ排出させるようにし、しかる後、炉体１を出
鋼口樋６側へ傾動させて出鋼口７より溶鋼５を出鋼させ
るようにしている。In the above, molten steel 5 produced in the furnace body 1
In order to discharge the slag before that, the air cylinder 12 of the slag opening door device is contracted to pull up the slag opening door 11 through the chain 13 to remove the slag opening 8 After opening the required amount, the furnace body 1 is tilted toward the slag port 8 side so that the slag 9 on the surface of the molten steel 5 is discharged to the outside of the furnace through the slag port 8, and then the furnace body 1 is discharged. The molten steel 5 is tapped from the tap tap 7 by tilting to the tap tap 6 side.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記従来の
製鋼用アーク炉の除滓口ドア装置の場合、炉体１の除滓
口８の周縁部と除滓口ドア１１の内側面との間には隙間
があり、ドア全閉時でもこの隙間から多量の空気が炉内
に流入するおそれがあり、又、炉体１を傾動させて除滓
口８よりスラグ９を排出させる際、スラグ９が除滓口８
の周囲やガイドレール１０、等に付着して、これが原因
で除滓口ドア１１の開閉不良が発生するおそれがあると
共に、スラグ９が受台１５の上面に溜ることによって除
滓口ドア８を閉じた時に除滓口ドア１１の下面と受台１
５の上面との間に隙間が生じて全閉不良が起こり、該隙
間から多量の空気が炉内へ流入して炉の熱効率の低下、
炉内の局部的過冷却等を生じさせる、という問題があ
る。However, in the case of the conventional slag opening door device of the arc furnace for steelmaking, between the peripheral portion of the slag opening 8 of the furnace body 1 and the inner surface of the slag opening door 11. Since there is a gap in the furnace, a large amount of air may flow into the furnace through this gap even when the door is fully closed. Also, when the furnace body 1 is tilted and the slag 9 is discharged from the slag outlet 8, Is slag mouth 8
There is a possibility that the slag 9 will adhere to the periphery of the rails, the guide rails 10, etc., causing a defective opening and closing of the slag door 11, and that the slag 9 collects on the upper surface of the pedestal 15 to remove the slag door 8 When closed, the lower surface of the slag door 11 and the pedestal 1
5, a gap is formed between the upper surface of No. 5 and the fully closed defect, and a large amount of air flows into the furnace through the gap to lower the thermal efficiency of the furnace.
There is a problem of causing local supercooling in the furnace.
【０００６】そこで、本発明は、除滓口ドアと除滓口と
の間に隙間を生じさせることをなくすと共に、除滓口か
らスラグを排出した際にスラグが辺りに付着した場合で
も除滓口ドアの開閉不良や全閉不良を防いで炉内の気密
性を確保することができるような製鋼用アーク炉の除滓
口ドア装置を提供しようとするものである。Therefore, the present invention eliminates the formation of a gap between the slag opening door and the slag opening, and removes the slag even when the slag adheres to the area when the slag is discharged from the slag opening. An object of the present invention is to provide a slag opening door device for an arc furnace for steelmaking that can prevent the opening / closing of the mouth door and the failure of fully closing it to ensure airtightness in the furnace.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するために、炉蓋に電極を配置し、炉体内に装入され
た原料と電極との間にアークを発生させて原料を溶解さ
せ、生じたスラグを除滓口より排出させるようにしてあ
る製鋼用アーク炉における上記炉体外壁の除滓口周縁部
に、中空の水冷枠を固定し、該水冷枠の左右両側部にガ
イドレールを上下方向にそれぞれ設置し、且つ、水冷構
造とした除滓口ドアを上記左右のガイドレールに沿って
上下動自在に取り付け、該水冷式除滓口ドアの上面にド
ア開閉用アクチュエータを連結すると共に、該水冷式除
滓口ドアの下面に横幅全体に亘るカッターを取り付け、
更に、上記水冷式除滓口ドアの前面に接して該水冷式除
滓口ドアを水冷枠に押し付けるようにする押付用アクチ
ュエータを複数個所に配置してなる構成とする。In order to solve the above-mentioned problems, the present invention arranges an electrode on a furnace lid and generates an arc between a raw material charged in the furnace body and the electrode to produce the raw material. The hollow water cooling frame is fixed to the periphery of the slag port of the outer wall of the furnace body in the arc furnace for steelmaking where the slag is melted, and the generated slag is discharged from the slag port, on both left and right sides of the water cooling frame. The guide rails are installed in the vertical direction, and the slag doors having a water cooling structure are vertically movably attached along the left and right guide rails, and a door opening / closing actuator is provided on the upper surface of the water cooling slag doors. While connecting, a cutter across the entire width is attached to the lower surface of the water-cooled slag outlet door,
Further, a plurality of pressing actuators are arranged at a plurality of positions in contact with the front surface of the water-cooled slag removal door to press the water-cooled slag removal door against the water cooling frame.
【０００８】水冷式除滓口ドアを閉じているとき、押付
用アクチュエータで押すことにより水冷枠との間に隙間
を形成されることがない。ドア開閉用アクチュエータに
より水冷式除滓口ドアを引き上げて除滓口を開き、炉体
を傾動させて除滓口よりスラグを排出させようとする場
合、水冷枠及び水冷式除滓口ドアに高温のスラグが接触
しても水冷枠及び水冷式除滓口の温度はほとんど上昇し
ないので、これらの間の温度差を大きくすることによっ
て水冷枠及び水冷式除滓口ドアにスラグが付着するのを
抑制することができ、しかも、水冷式除滓口ドアが高温
によって変形してしまうことも防止することができる。
又、スラグの排出が終了して除滓口を閉塞しようとする
場合、押付用アクチュエータにより水冷式除滓口ドアを
水冷枠に押え付けるようにした状態で、ドア開閉用アク
チュエータにより水冷式除滓口ドアを押し下げるように
すると、除滓口よりスラグを排出させた時に水冷枠の前
面に少量のスラグが付着していたとしても、付着してい
るスラグを水冷式除滓口ドアが押し下げられるときに下
面に取り付けたカッターにより切断したり剥離すること
ができるので、水冷式除滓口ドアを水冷枠に密着させる
ことができる。このとき、押付用アクチュエータの先端
に押えローラを取り付けると、水冷式除滓口ドアの前面
を転動できるので、動作を円滑に行うことができる。When the water-cooled slag door is closed, the pressing actuator does not create a gap between the door and the water-cooling frame. If the door opening / closing actuator is used to pull up the water-cooled slag opening door to open the slag opening and tilt the furnace body to discharge slag from the slag opening, the water-cooled frame and the water-cooled slag opening door are exposed to high temperatures. Since the temperature of the water-cooled frame and the water-cooled slag outlet hardly rises even if the slag comes in contact with the slag, increasing the temperature difference between them prevents slag from adhering to the water-cooled frame and the water-cooled slag inlet door In addition, it is possible to prevent the water-cooled slag door from being deformed due to high temperature.
When the slag is discharged and the slag opening is to be closed, the water-cooling slag opening door is pressed by the pressing actuator against the water-cooling frame, and the water-cooling slag opening is opened by the door opening / closing actuator. If the mouth door is pushed down, even if a small amount of slag is attached to the front of the water cooling frame when the slag is discharged from the slag outlet, when the slag that has adhered is pushed down by the water cooling type slag door. Since it can be cut or peeled off by a cutter attached to the lower surface of the, the water-cooled slag door can be closely attached to the water-cooled frame. At this time, if a pressing roller is attached to the tip of the pressing actuator, the front surface of the water-cooled slag opening door can be rolled, so that the operation can be performed smoothly.
【０００９】又、水冷式除滓口ドアの下面に取り付けた
カッターを傾斜刃とすると、傾斜刃では切断個所が点と
なってドア開閉用アクチュエータの押し下げ力を集中さ
せることができるので、小さな力で大きな切断力を発生
させることができる。If the cutter attached to the lower surface of the water-cooled slag door is an inclined blade, the cutting point of the inclined blade serves as a point to concentrate the pushing force of the door opening / closing actuator. A large cutting force can be generated.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１（イ）（ロ）及び図２は本発明の製鋼
用アーク炉の除滓口ドア装置の実施の一形態を示すもの
で、図３に示した場合と同様に構成されている製鋼用ア
ーク炉において、上部炉体１の外側壁の除滓口８の周縁
部に、該除滓口８を取り囲むように枠体とし且つ内部を
中空とし冷却媒体としての冷却水を流すようにして冷却
構造とした水冷枠１６を固定し、該水冷枠１６に冷却水
配管１７を接続し、且つ上記水冷枠１６の左右両側部に
一対のガイドレール１８を上下方向に配設する。一方、
内部空間に冷却媒体としての冷却水を流すようにして水
冷構造とし且つ冷却水配管２０を接続した中空の水冷式
除滓口ドア１９を構成し、該水冷式除滓口ドア１９を上
記ガイドレール１８に沿って上下に移動自在に配置し、
且つ、該水冷式除滓口ドア１９を、固定の支持フレーム
２１に下向きに支持させた左右のドア開閉用アクチュエ
ータとしての油圧シリンダ２２の各ロッド先端に連結す
ると共に、該水冷式除滓口ドア１９の下面には横幅全体
に亘るカッター２３を複数のボルト２４によって取り付
けて、油圧シリンダ２２の伸縮作動により水冷式除滓口
ドア１９とカッター２３が一体となって昇降させられる
ようにする。FIGS. 1 (a), (b) and FIG. 2 show an embodiment of a slag opening door device of a steelmaking arc furnace according to the present invention, which has the same structure as that shown in FIG. In a steelmaking arc furnace, the outer furnace wall of the upper furnace body 1 has a peripheral edge portion of the slag opening 8 with a frame body surrounding the slag opening 8 and a hollow interior so that cooling water as a cooling medium flows. The water cooling frame 16 having the cooling structure is fixed, the cooling water pipe 17 is connected to the water cooling frame 16, and a pair of guide rails 18 are vertically arranged on both left and right sides of the water cooling frame 16. on the other hand,
A hollow water-cooled slag opening door 19 having a water-cooling structure in which cooling water as a cooling medium is made to flow in the internal space and connected to a cooling water pipe 20 is formed, and the water-cooled slag opening door 19 is used as the guide rail. Placed up and down along 18
The water-cooled slag door 19 is connected to the rod ends of the hydraulic cylinders 22 as left and right door opening / closing actuators supported downward by a fixed support frame 21, and the water-cooled slag door is also connected. A cutter 23 having a lateral width is attached to the lower surface of the pipe 19 by a plurality of bolts 24 so that the water-cooled slag door 19 and the cutter 23 can be lifted and lowered as a unit by the expansion and contraction operation of the hydraulic cylinder 22.
【００１２】更に、上記除滓口８の前方位置には、除滓
口８よりスラグを排水させる際に邪魔にならないように
して支持フレーム２５を設けて、該支持フレーム２５
に、上下左右合計４本の押付用アクチュエータとしての
油圧シリンダ２６を、水冷式除滓口ドア１９の四隅を押
圧できるような間隔として除滓口８の方向へ向け水平に
固定すると共に、各油圧シリンダ２６のロッド先端に押
えローラ２７を上下方向に回転するようにして取り付け
てなる構成とする。Further, a support frame 25 is provided at a position in front of the slag port 8 so as not to be an obstacle when the slag is drained from the slag port 8.
In addition, the hydraulic cylinders 26 as a total of four actuators for pressing up, down, left and right are horizontally fixed toward the slag opening 8 at intervals such that the four corners of the water-cooled slag opening door 19 can be pressed. The pressing roller 27 is attached to the tip of the rod of the cylinder 26 so as to rotate in the vertical direction.
【００１３】今、炉体１内へ装入された原料としてのス
クラップをアークを用いて溶解させようとする場合は、
予め、上記左右のドア開閉用アクチュエータとしての油
圧シリンダ２２を伸長させることにより水冷式除滓口ド
ア１９をガイドレール１８に沿い下降させて除滓口８を
閉塞させ、更に、上記４本の押付用アクチュエータとし
ての油圧シリンダ２６を伸長作動させて押えローラ２７
を介し水冷式除滓口ドア１９を水冷枠１６に押し付けて
密着させておくようにする。これにより炉内の気密性を
確保して炉の燃焼効率を向上させることができる。When attempting to melt the scrap as a raw material charged in the furnace body 1 by using an arc,
In advance, by extending the hydraulic cylinders 22 as left and right door opening / closing actuators, the water-cooled slag opening door 19 is lowered along the guide rails 18 to close the slag opening 8, and further, the four pressing members are pressed. Hydraulic cylinder 26 as an actuator for extension is operated to extend the pressure roller 27.
The water-cooled slag outlet door 19 is pressed against the water-cooled frame 16 via the so as to be in close contact therewith. Thereby, the airtightness in the furnace can be secured and the combustion efficiency of the furnace can be improved.
【００１４】又、炉体１内でスクラップを溶解させた際
に生じたスラグを除滓口８より排出させようとする場合
は、上記冷却水配管１７及び２０を通して水冷枠１６の
内部及び水冷式除滓口ドア１９の内部に冷却水を循環さ
せるようにし、又、上記４本の押付用の油圧シリンダ２
６を収縮作動させて押えローラ２７を水冷式除滓口ドア
１９より離した状態にしてから上記左右の開閉用の油圧
シリンダ２２を同時に収縮作動させて水冷式除滓口ドア
１９を引き上げて除滓口８を開け、しかる後、炉体１を
除滓口８側へ傾動させてスラグを自重により排出させる
ようにするが、この際、水冷枠１６及び水冷式除滓口ド
ア１９に冷却水を循環させるようにしたことによって１
５００〜１６００℃の高温になっているスラグが接触し
ても水冷枠１６及び水冷式除滓口ドア１９の温度はほと
んど上昇しないので、これらの間の温度差を大きくする
ことによって水冷枠１６及び水冷式除滓口ドア１９にス
ラグが付着するのを抑制することができ、しかも、水冷
式除滓口ドア１９が高温のスラグに接したことによって
変形してしまうことも防止できる。When the slag generated when the scrap is melted in the furnace body 1 is to be discharged from the slag port 8, the inside of the water cooling frame 16 and the water cooling type are passed through the cooling water pipes 17 and 20. Cooling water is circulated inside the slag opening door 19, and the four hydraulic cylinders 2 for pressing are pressed.
6 is contracted to bring the presser roller 27 away from the water-cooled slag door 19, and then the left and right hydraulic cylinders 22 for opening and closing are simultaneously contracted to lift the water-cooled slag door 19 to remove it. The slag mouth 8 is opened, and then the furnace body 1 is tilted to the slag mouth 8 side so that the slag is discharged by its own weight. At this time, the cooling water is supplied to the water cooling frame 16 and the water cooling type slag mouth door 19. By making it circulate
Since the temperature of the water-cooled frame 16 and the water-cooled slag opening door 19 hardly rises even if the slag having a high temperature of 500 to 1600 ° C. comes into contact, the water-cooled frame 16 and the water-cooled frame 16 and It is possible to prevent the slag from adhering to the water-cooled slag opening door 19, and also to prevent the water-cooled slag opening door 19 from being deformed due to contact with the hot slag.
【００１５】次いで、スラグの排出が終了して除滓口８
を閉塞しようとする場合、まず、上記４本の押付用の油
圧シリンダ２６のうちの上側の２本を伸長作動させて水
冷式除滓口ドア１９の下端部を水冷枠１６の前面上部に
押し付けるようにした後、上記左右のドア開閉用の油圧
シリンダ２２を同時に伸長作動させて水冷式除滓口ドア
１９をガイドレール１８に沿って押し下げるようにし、
該水冷式除滓口ドア１９の下端部が下側の押付用油圧シ
リンダ２６の高さまで下降したならば下側の２本の押付
用の油圧シリンダ２６も伸長作動させ、水冷式除滓口ド
ア１９を４本の押付用油圧シリンダ２６により水冷枠１
６に押え付けた状態として油圧シリンダ２２により引き
続き押し下げるようにする。この際、４本の押付用の油
圧シリンダ２６のロッド先端の押えローラ２７を介して
水冷式除滓口ドア１９を水冷枠１６に押し付けるように
してあることから、水冷式除滓口ドア１９が下降するの
に伴って各押えローラ２７が回転して水冷式除滓口ドア
１９をスムーズに押し下げることができ、しかも、水冷
式除滓口ドア１９の下面にカッター２３が取り付けてあ
るので、仮に、除滓口８よりスラグを排出させた時に水
冷枠１６の前面に少量のスラグが付着していたとして
も、付着しているスラグは水冷式除滓口ドア１９が油圧
シリンダ２２により押し下げられるときカッター２３に
より切断されたり剥離されることになるので、水冷式除
滓口ドア１９を水冷枠１６に密着させた状態で下降させ
ることができて炉内の気密性を確保することができる。Next, the slag discharge is completed and the slag port 8 is removed.
In order to close the water, first, the upper two of the four hydraulic cylinders 26 for pressing are extended to press the lower end of the water-cooled slag door 19 against the upper front of the water-cooled frame 16. After that, the hydraulic cylinders 22 for opening and closing the left and right doors are simultaneously extended to push down the water-cooled slag door 19 along the guide rails 18,
When the lower end of the water-cooled slag door 19 is lowered to the height of the lower pressing hydraulic cylinder 26, the lower two hydraulic cylinders for pressing 26 are also extended, and the water-cooled slag opening door 19 is extended. 19 with four hydraulic cylinders 26 for pressing the water cooling frame 1
Then, the hydraulic cylinder 22 is continuously pushed down with the hydraulic cylinder 22 held down. At this time, since the water-cooled slag opening door 19 is pressed against the water-cooled frame 16 via the pressing roller 27 at the rod tip of the four pressing hydraulic cylinders 26, the water-cooled slag opening door 19 is As each pressing roller 27 rotates as it descends, the water-cooled slag door 19 can be pushed down smoothly. Moreover, since the cutter 23 is attached to the lower surface of the water-cooled slag door 19, Even if a small amount of slag adheres to the front surface of the water-cooling frame 16 when the slag is discharged from the slag removal port 8, the slag that has adhered is removed when the water-cooled slag removal door 19 is pushed down by the hydraulic cylinder 22. Since it is cut or peeled off by the cutter 23, the water-cooled slag removal door 19 can be lowered while being in close contact with the water-cooled frame 16 and the airtightness in the furnace can be secured. That.
【００１６】上記において、図２に示すように、水冷式
除滓口ドア１９の下面に取り付けるカッター２３として
傾斜角θをθ＝５°〜３０°とした傾斜刃を用いるよう
にすると、傾斜刃の場合には切断個所と点で接するよう
になって油圧シリンダ２２の押し下げ力を切断点に集中
させることができるので、平行刃と比較して小さな押し
下げ力で大きな剪断力を発生させることができ、更に、
該カッター２３を水冷式除滓口ドア１９の下面にボルト
２４によって取り付けられるようにしたことにより、多
数回の使用により刃先が摩耗したり破損した時には容易
に交換することができる。In the above description, as shown in FIG. 2, when the inclined blade having the inclination angle θ of θ = 5 ° to 30 ° is used as the cutter 23 attached to the lower surface of the water-cooled slag opening door 19, the inclined blade is In the case of, since the pressing point of the hydraulic cylinder 22 can be concentrated at the cutting point by making contact with the cutting point at a point, it is possible to generate a large shearing force with a small pressing force as compared with the parallel blade. , In addition,
Since the cutter 23 is attached to the lower surface of the water-cooled slag removal door 19 by the bolt 24, it can be easily replaced when the cutting edge is worn or damaged by many uses.
【００１７】なお、本発明は上記実施の形態のみに限定
されるものではなく、たとえば、水冷式除滓口ドア１９
の油圧シリンダ２２及び押付用の油圧シリンダ２６は、
油圧式のものに代えてエアシリンダや電動ジャッキとす
ることもでき、要は、水冷式除滓口ドア１９を押し下げ
てカッター２３に剪断力を付与したり水冷式除滓口ドア
１９を水冷枠１６に押し付けることができれば如何なる
アクチュエータを用いるようにしてもよく、又、ＡＣ炉
に対しても全く同様にして適用することができ、その
他、要旨を逸脱しない範囲内において種々変更を加え得
ることは勿論である。The present invention is not limited to the above-described embodiment, but is, for example, a water-cooled slag door 19.
The hydraulic cylinder 22 and the hydraulic cylinder 26 for pressing are
An air cylinder or an electric jack may be used instead of the hydraulic type. The point is to push down the water-cooled slag opening door 19 to apply a shearing force to the cutter 23 or to use the water-cooled slag opening door 19 for a water-cooled frame. Any actuator may be used as long as it can be pressed against 16, and it can be applied to an AC furnace in exactly the same manner. In addition, various changes can be made without departing from the scope of the invention. Of course.
【００１８】[0018]
【発明の効果】以上述べた如く、本発明の製鋼用アーク
炉の除滓口ドア装置によれば、製鋼用アーク炉の炉体外
壁の除滓口の周縁部に水冷枠を固定し、該水冷枠の左右
両側部に上下方向に設置したガイドレールに沿い水冷式
除滓口ドアを移動自在に配置し、該水冷式除滓口ドアに
ドア開閉用アクチュエータの先端を連結すると共に下面
にカッターを取り付け、且つ該水冷式除滓口ドアの前面
に押付用アクチュエータの先端を当接させて水冷枠に押
し付けるようにしてなる構成としてあるので、除滓口を
除滓口ドアで閉塞したときに両者間に隙間を生じさせる
ことがなく、操業中に外気が流入するおそれをなくすこ
とができ、又、除滓口よりスラグを排出した際に水冷枠
及び水冷式除滓口ドアとスラグとの温度差を大きくする
ことができて、水冷枠及び水冷式除滓口ドアにスラグが
付着するのを抑制すると共に水冷式除滓口ドアの変形を
防止することができ、更に、仮に水冷枠の前面にスラグ
が付着したとしても、水冷式除滓口ドアを押付用アクチ
ュエータにより水冷枠に押し付けた状態でドア開閉用ア
クチュエータによりガイドレールに沿って押し下げるよ
うにして下面に取り付けたカッターにて付着したスラグ
を切断したり剥離することができるようにしてあること
から、水冷式除滓口ドアを水冷枠に密着させて炉内の気
密性を確保することができて、炉内に空気が流入して炉
の熱効率が低下してしまうことを防止することができ、
又、水冷式除滓口ドアの下面に取り付けるカッターを傾
斜刃とすると、切断個所が点となってドア開閉用アクチ
ュエータの押し下げ力を切断点に集中させることができ
て小さな力で大きな剪断力を発生させることができる、
という優れた効果を発揮する。As described above, according to the slag opening door device of the steelmaking arc furnace of the present invention, the water cooling frame is fixed to the peripheral portion of the slag opening of the outer wall of the furnace body of the steelmaking arc furnace, A water-cooled slag door is movably arranged along guide rails installed vertically on the left and right sides of the water-cooled frame, and the tip of a door opening / closing actuator is connected to the water-cooled slag door and a cutter is attached to the lower surface. Is attached, and the tip of the pressing actuator is brought into contact with the front surface of the water-cooled slag opening door to press it against the water-cooling frame, so that when the slag opening is closed by the slag opening door There is no gap between the two and it is possible to eliminate the risk of outside air flowing in during operation, and when the slag is discharged from the slag outlet, the water cooling frame and the water cooling type slag outlet door and the slag The temperature difference can be increased and the water It is possible to prevent slag from adhering to the frame and the water-cooled slag door and prevent deformation of the water-cooled slag door.Furthermore, even if slag adheres to the front of the water-cooled frame, it will be water-cooled. While the slag door is pressed against the water-cooled frame by the pressing actuator, the door opening / closing actuator pushes it down along the guide rails so that the slag attached by the cutter attached to the lower surface can be cut or peeled off. Therefore, the water-cooled slag outlet door can be attached to the water-cooled frame to ensure the airtightness in the furnace, and air may flow into the furnace to reduce the thermal efficiency of the furnace. Can be prevented,
Also, if the cutter attached to the bottom surface of the water-cooled slag door is an inclined blade, the cutting point becomes a point and the pressing force of the door opening / closing actuator can be concentrated at the cutting point, and a large shearing force can be achieved with a small force. Can be generated,
Exerts an excellent effect.
【図１】本発明の製鋼用アーク炉の除滓口ドア装置の実
施の一形態を示すもので、（イ）は側面図、（ロ）は
（イ）のＢ−Ｂ方向矢視図である。1 shows an embodiment of a slag outlet door device for an arc furnace for steelmaking of the present invention, (a) is a side view, (b) is a view taken in the direction of BB in (a). is there.
【図２】カッターとして傾斜刃を用いた場合を示す拡大
図である。FIG. 2 is an enlarged view showing a case where an inclined blade is used as a cutter.
【図３】製鋼用アーク炉の一例を示す断面図である。FIG. 3 is a cross-sectional view showing an example of a steelmaking arc furnace.
【図４】従来より用いられている製鋼用アーク炉の除滓
口ドア装置を示すもので、（イ）は側面図、（ロ）は
（イ）のＡ−Ａ方向矢視図である。FIG. 4 is a view showing a slag outlet door device of a conventional arc furnace for steelmaking, in which (a) is a side view and (b) is a view taken in the direction of arrow AA of (a).
１ 炉体 ２ 炉蓋 ３ 底部電極 ４ 上部電極 ８ 除滓口 ９ スラグ １６ 水冷枠 １８ ガイドレール １９ 水冷式除滓口ドア ２２ 油圧シリンダ（ドア開閉用アクチュエータ） ２３ カッター（傾斜刃） ２６ 油圧シリンダ（押付用アクチュエータ） ２７ 押えローラ 1 Furnace Body 2 Furnace Cover 3 Bottom Electrode 4 Upper Electrode 8 Slag Port 9 Slag 16 Water Cooling Frame 18 Guide Rail 19 Water Cooling Slag Port Door 22 Hydraulic Cylinder (Door Opening / Closing Actuator) 23 Cutter (Inclined Blade) 26 Hydraulic Cylinder ( Pressing actuator) 27 Presser roller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 深谷 智章 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社横浜エンジニアリ ングセンター内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Fukaya 1 Shinshinarahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries Ltd. Yokohama Engineering Center
Claims (3)
た原料と電極との間にアークを発生させて原料を溶解さ
せ、生じたスラグを除滓口より排出させるようにしてあ
る製鋼用アーク炉における上記炉体外壁の除滓口周縁部
に、中空の水冷枠を固定し、該水冷枠の左右両側部にガ
イドレールを上下方向にそれぞれ設置し、且つ、水冷構
造とした除滓口ドアを上記左右のガイドレールに沿って
上下動自在に取り付け、該水冷式除滓口ドアの上面にド
ア開閉用アクチュエータを連結すると共に、該水冷式除
滓口ドアの下面に横幅全体に亘るカッターを取り付け、
更に、上記水冷式除滓口ドアの前面に接して該水冷式除
滓口ドアを水冷枠に押し付けるようにする押付用アクチ
ュエータを複数個所に配置してなることを特徴とする製
鋼用アーク炉の除滓口ドア装置。1. An electrode is arranged on a furnace lid, an arc is generated between a raw material charged in the furnace body and the electrode to melt the raw material, and the generated slag is discharged from a slag outlet. A hollow water cooling frame is fixed to the slag opening peripheral portion of the furnace body outer wall in a certain steelmaking arc furnace, and guide rails are installed in the vertical direction on both left and right sides of the water cooling frame, and a water cooling structure is provided. The slag door is attached so that it can move up and down along the left and right guide rails, and a door opening / closing actuator is connected to the upper surface of the water-cooled slag door, and the entire width is provided on the lower surface of the water-cooled slag door. Attach the cutter across
Further, a pressing actuator for arranging a plurality of pressing actuators in contact with the front surface of the water-cooled slag opening door to press the water-cooled slag opening door against the water cooling frame is provided at a plurality of positions. Slag door device.
ッターを傾斜刃とした請求項１記載の製鋼用アーク炉の
除滓口ドア装置。2. The slagging door device for a steelmaking arc furnace according to claim 1, wherein the cutter attached to the lower surface of the water-cooled slagging door is an inclined blade.
ドアの前面に接して転動するよう押えローラを先端に備
えた構成とした請求項１記載の製鋼用アーク炉の除滓口
ドア装置。3. A slag door device for an arc furnace for steel making according to claim 1, wherein the pressing actuator is provided with a pressing roller at the tip thereof so as to roll in contact with the front surface of the water-cooled slag door. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31376295A JP3867310B2 (en) | 1995-11-08 | 1995-11-08 | Removal door device for arc furnace for steel making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31376295A JP3867310B2 (en) | 1995-11-08 | 1995-11-08 | Removal door device for arc furnace for steel making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09133475A true JPH09133475A (en) | 1997-05-20 |
| JP3867310B2 JP3867310B2 (en) | 2007-01-10 |
Family
ID=18045226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31376295A Expired - Fee Related JP3867310B2 (en) | 1995-11-08 | 1995-11-08 | Removal door device for arc furnace for steel making |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3867310B2 (en) |
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| KR20160050117A (en) * | 2014-10-28 | 2016-05-11 | 주식회사 포스코 | Door apparatus for discharging slag |
| CN112165998A (en) * | 2018-05-31 | 2021-01-01 | 亚进产业株式会社 | Multichamber type heater with door moving portion |
| CN108844371A (en) * | 2018-09-12 | 2018-11-20 | 中冶京诚工程技术有限公司 | Closed furnace door of electric arc furnace |
| CN110631046A (en) * | 2019-10-25 | 2019-12-31 | 浙江森炉节能环保科技有限公司 | Fuel combustion ash pushing system for boiler and ash pushing method thereof |
| CN110631046B (en) * | 2019-10-25 | 2024-01-26 | 浙江森炉节能环保科技有限公司 | Fuel combustion ash pushing system for boiler and ash pushing method thereof |
| CN113483574A (en) * | 2021-07-20 | 2021-10-08 | 陈俊公 | Double-layer protection door for brick kiln production |
Also Published As
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|---|---|
| JP3867310B2 (en) | 2007-01-10 |
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