JPH063349Y2 - Furnace bottom tapping device for melting furnace - Google Patents
Furnace bottom tapping device for melting furnaceInfo
- Publication number
- JPH063349Y2 JPH063349Y2 JP2390688U JP2390688U JPH063349Y2 JP H063349 Y2 JPH063349 Y2 JP H063349Y2 JP 2390688 U JP2390688 U JP 2390688U JP 2390688 U JP2390688 U JP 2390688U JP H063349 Y2 JPH063349 Y2 JP H063349Y2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- cover member
- tap hole
- inert gas
- melting
- 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
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は溶解炉の炉底出鋼装置に係り、特に湯出し口の
損耗を防止することができる溶解炉の炉底出鋼装置に関
するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a furnace bottom tapping device for a melting furnace, and more particularly to a furnace bottom tapping device for a melting furnace capable of preventing wear of a tap hole. Is.
［従来の技術］ 一般に金属の溶解炉としては、主にスクラップを溶解・
精錬するアーク炉や、高炉で出銑した溶銑を精錬する転
炉等が知られている。[Prior Art] Generally, a metal melting furnace mainly melts scrap.
An arc furnace for refining and a converter for refining the hot metal tapped in the blast furnace are known.
近年、第３図に示すような炉底出鋼式アーク炉５が採用
されている。図示するように、炉底出鋼式アーク炉５
は、同様に炉体２及び炉蓋３を鋼板及び耐火レンガで形
成し、球面状に形成された炉底６の一部を径方向外方に
延出させて出鋼部７を設け、この出鋼部７に湯出し口８
を形成したものである。この湯出し口８には下方からこ
れを閉成する開閉ゲート９が設けられ、その直下には取
鍋１０が設置されるようになっている。この炉底出鋼式
アーク炉５は、炉体２に設けられた傾動装置１１による
炉体２の傾斜角も小さくて済み、且つ炉底２から出鋼す
るため取鍋１１内にスラグが混入し難い。In recent years, a furnace bottom discharge type arc furnace 5 as shown in FIG. 3 has been adopted. As shown in the figure, the bottom steel discharge type arc furnace 5
Similarly, the furnace body 2 and the furnace lid 3 are formed of a steel plate and refractory bricks, and a part of the furnace bottom 6 formed in a spherical shape is extended radially outward to provide a tapped steel portion 7. Hot water outlet 8 on tapping part 7
Is formed. An opening / closing gate 9 that closes the hot water outlet 8 from below is provided, and a ladle 10 is installed immediately below the hot water outlet 8. In this furnace bottom tapping type arc furnace 5, the tilt angle of the furnace body 2 by the tilting device 11 provided in the furnace body 2 can be small, and since steel is tapped from the furnace bottom 2, slag is mixed in the ladle 11. It's hard to do.
上記湯出し口８を閉成する開閉ゲート９には、第４図に
示すような回動するフラッパーゲート１２と第５図に示
すような水平移動するスライドゲート１３とが採用され
ている。As the opening / closing gate 9 for closing the tap hole 8, a rotating flapper gate 12 as shown in FIG. 4 and a horizontally moving slide gate 13 as shown in FIG. 5 are adopted.
この湯出し口８の構造は炉底２の鋼板及び耐火レンガを
貫通させて円柱状の貫通孔を形成し、その内壁に黒鉛ブ
ロック１４を内装したものであった。The structure of this tap hole 8 was one in which a steel plate and a refractory brick of the furnace bottom 2 were penetrated to form a cylindrical through hole, and a graphite block 14 was provided inside the inner wall thereof.
［考案が解決しようとする課題］ ところで、従来の構造にあっては、炉内に収容された溶
鋼の出鋼時に、湯出し口８の下端部が高温で空気中にさ
らされるため、湯出し口８に内装された黒鉛ブロック１
４が酸化して損耗するという問題があった。[Problems to be Solved by the Invention] In the conventional structure, when tapping molten steel stored in the furnace, the lower end of the tapping port 8 is exposed to the air at high temperature, Graphite block 1 installed in the mouth 8
There was a problem that 4 was oxidized and worn out.
上述の如き課題に鑑みて本考案は湯出し口に内装された
黒鉛ブロック出鋼時の酸化による損耗を防止することが
できる溶解炉の炉底出鋼装置を提供することを目的とす
るものである。In view of the above problems, the present invention aims to provide a furnace bottom tapping device for a melting furnace capable of preventing wear due to oxidation when tapping a graphite block installed in a taphole. is there.
［課題を解決するための手段］ 上記目的を達成すべく本考案は溶解炉の炉底に形成され
黒鉛ブロックによって内装された湯出し口に着脱自在に
設けられ、該湯出し口の下部開口部を覆うと共に、これ
から所定の長さ垂下され下端部が開口された筒体状のカ
バー部材と、該カバー部材内を不活性ガス雰囲気にすべ
くこれに接続された不活性ガス供給手段とからなるもの
である。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is detachably provided in a hot water outlet formed in the furnace bottom of a melting furnace and equipped with a graphite block, and a lower opening portion of the hot water outlet is provided. And a cylindrical cover member that hangs a predetermined length from which the lower end portion is opened, and an inert gas supply means connected to the cover member so as to create an inert gas atmosphere in the cover member. It is a thing.
［作用］ 炉内に収容された溶鋼の出鋼時に、上記カバー部材は湯
出し口に取り付けられる。このカバー部材は筒体状に形
成され、湯出し口の下部開口部を覆うと共に、これから
所定の長さ垂下されている。そして、このカバー部材の
内部は不活性ガス供給手段により不活性ガス雰囲気とな
る。従って、出鋼時に黒鉛ブロックの高温酸化損耗が防
止されるものである。[Operation] When the molten steel stored in the furnace is tapped, the cover member is attached to the tap hole. The cover member is formed in a cylindrical shape, covers the lower opening of the tap hole, and hangs a predetermined length from this. Then, the inside of the cover member is made into an inert gas atmosphere by the inert gas supply means. Therefore, the high temperature oxidative wear of the graphite block at the time of tapping is prevented.
［実施例］ 以下に本考案の溶解炉の炉底出鋼装置の一実施例を添付
図面に基づいて詳述する。[Embodiment] An embodiment of a steel bottom tapping device for a melting furnace of the present invention will be described in detail below with reference to the accompanying drawings.
第１図及び第２図に示す如く、溶解炉２０の炉体は鋼板
２１及び耐火レンガ２２にて形成されている。第１図
は、その炉底２３の要部を示すものであり、炉底２３に
は炉内で溶解された溶鋼を出鋼するための湯出し口２４
が形成されている。この湯出し口２４は、上記鋼板２１
及び耐火レンガ２２を貫通させて円柱状に開口された貫
通孔２５内に、黒鉛ブロック２６を内装して形成されて
いる。上記炉底２３の外壁には上記湯出し口２４の下部
開口部を閉成するフラッパーゲートやスライドゲート等
の開閉ゲート２７が設けられている。As shown in FIGS. 1 and 2, the furnace body of the melting furnace 20 is formed of a steel plate 21 and a refractory brick 22. FIG. 1 shows an essential part of the furnace bottom 23. The furnace bottom 23 has a tap hole 24 for tapping molten steel melted in the furnace.
Are formed. The tap hole 24 is formed by the steel plate 21.
Also, a graphite block 26 is formed inside a through hole 25 that is opened through the refractory brick 22 in a cylindrical shape. An opening / closing gate 27 such as a flapper gate or a slide gate that closes the lower opening of the tap hole 24 is provided on the outer wall of the furnace bottom 23.
また、上記湯出し口２４の下端部にはカバー部材２８が
着脱自在に設けられている。このカバー部材２８は筒体
状に形成され、その上端部は湯出し口２４の外周の鋼板
２１に駆動装置（図示せず）により着脱自在な構造とな
っている。このカバー部材２８の上部は拡径されてお
り、この拡径部２９は湯出し口２４の下方に突出された
部分の外周を覆っている。また、カバー部材２８の下部
は湯出し口２４の開口径と略同径となるように縮径され
ており、この縮径部３０は拡径部２９から垂下されてい
る。すなわち、カバー部材２８は上記拡径部２９と縮径
部３０とを一体的に成形した筒体であり、内部には耐火
物３５が張ってある。そして、このカバー部材２８は上
記湯出し口２４の下部開口部を覆うと共に、湯出し口２
４の下端部から所定の長さ垂下されている。このカバー
部材２８の拡径部２９には不活性ガス供給手段３１が接
続されている。この不活性ガス供給手段３１は上記拡径
部２９に接続されたガス供給管３２と、これに接続され
たArやＮ２等の不活性ガスを収容するボンベ３３と、上
記ガス供給管３２に介設され不活性ガス量を調節する開
閉弁３４とからなっている。上記ガス供給管３２は、カ
バー部材２８内を均一に不活性ガス雰囲気にすべく複数
に分岐されてカバー部材２８に接続されている。Further, a cover member 28 is detachably provided at the lower end of the tap hole 24. The cover member 28 is formed in a tubular shape, and the upper end portion thereof has a structure that is attachable to and detachable from the steel plate 21 on the outer periphery of the tap hole 24 by a drive device (not shown). The diameter of the upper portion of the cover member 28 is expanded, and the expanded diameter portion 29 covers the outer periphery of the portion of the tap hole 24 that projects downward. Further, the lower portion of the cover member 28 is reduced in diameter so as to be substantially the same diameter as the opening diameter of the tap hole 24, and the reduced diameter portion 30 is suspended from the enlarged diameter portion 29. That is, the cover member 28 is a tubular body in which the expanded diameter portion 29 and the reduced diameter portion 30 are integrally molded, and the refractory material 35 is stretched inside. The cover member 28 covers the lower opening of the tap 24, and the tap 2
4 hangs from the lower end of the unit 4 by a predetermined length. An inert gas supply means 31 is connected to the expanded diameter portion 29 of the cover member 28. The inert gas supply means 31 includes a gas supply pipe 32 connected to the expanded diameter portion 29, a cylinder 33 connected to the gas supply pipe 32 for containing an inert gas such as Ar or N 2, and the gas supply pipe 32. And an on-off valve 34 for controlling the amount of inert gas. The gas supply pipe 32 is connected to the cover member 28 by being branched into a plurality of parts so that the inside of the cover member 28 is uniformly made into an inert gas atmosphere.
ここで、上記カバー部材２８が垂下される所定の長さと
は、カバー部材２８の下方から空気が侵入して湯出し口
２４の下端部が空気に触れることのない長さとする。そ
して、その長さ設定は上記縮径部３０の長さを設定する
ことにより行う。Here, the predetermined length by which the cover member 28 hangs is such a length that air does not enter from below the cover member 28 and the lower end portion of the tap hole 24 does not come into contact with air. The length is set by setting the length of the reduced diameter portion 30.
次に、上記実施例における作用を述べる。Next, the operation of the above embodiment will be described.
溶解炉２０においてスクラップ等の溶解・精錬工程の終
了後、取鍋に炉内で溶解された溶鋼を出鋼する。この
際、溶鋼の熱により湯出し口２４の内壁も高温となる。
従って、湯出し口２４の下端部が空気と接触している
と、湯出し口２４に内装された黒鉛ブロック２６の下端
部が酸化して損耗することになる。しかし、本実施例に
あっては、カバー部材２８を湯出し口２４に着脱自在に
設けている。このカバー部材２８は炉内で溶解された溶
鋼の出鋼時に、上記開閉ゲート２７を開く前に駆動装置
により、出鋼口直下に移動させる。次にゲート２７を開
とし（退避）、カバー２８を出鋼口下端に装着する。こ
の時点で湯出し口２４内に充填された砂が落下し出鋼が
始まる。そして、このカバー部材２８内に不活性ガス供
給手段３１のガス供給管３２に介設された開閉弁３４を
開放してボンベ３３からArやＮ２等の不活性ガスを供給
して不活性ガス雰囲気にする。このカバー部材２８の拡
径部２９は湯出し口２４の下部開口部を覆っており、縮
径部３０は下方から空気が侵入して湯出し口２４が空気
に触れることのないような長さだけ垂下されているた
め、湯出し口２４の下端部は出鋼時には全く空気と接触
することがない。After the melting and refining process of scraps and the like in the melting furnace 20, the molten steel melted in the furnace is tapped into a ladle. At this time, the inner wall of the tap hole 24 also becomes hot due to the heat of the molten steel.
Therefore, when the lower end portion of the tap hole 24 is in contact with air, the lower end portion of the graphite block 26 installed in the tap hole 24 is oxidized and worn. However, in this embodiment, the cover member 28 is detachably provided on the tap hole 24. When the molten steel melted in the furnace is tapped, the cover member 28 is moved to a position right below the tapping port by a driving device before opening the opening / closing gate 27. Next, the gate 27 is opened (retracted), and the cover 28 is attached to the lower end of the tap hole. At this point, the sand filled in the tap hole 24 falls to start tapping. Then, an opening / closing valve 34 provided in the gas supply pipe 32 of the inert gas supply means 31 is opened in the cover member 28 to supply an inert gas such as Ar or N 2 from the cylinder 33 to supply the inert gas. Make it an atmosphere. The enlarged diameter portion 29 of the cover member 28 covers the lower opening portion of the tap hole 24, and the reduced diameter portion 30 has a length such that air does not enter from below and the tap hole 24 does not touch the air. Since it is suspended, the lower end of the tap hole 24 does not come into contact with air at the time of tapping.
これにより、湯出し口２４に内装された黒鉛ブロック２
６は溶融物の熱を受けて高温となっても酸化することな
く、その損耗が防止されるものである。As a result, the graphite block 2 installed inside the tap 24
No. 6 does not oxidize even when it receives a heat of the melt and becomes a high temperature, and its wear is prevented.
また、溶融物排出後、溶解炉２０の溶解・精錬工程に移
る場合、カバー部材２８を湯出し口２４から取り外し開
閉ゲート２７を閉とし、湯出し口２４内に砂を充填す
る。Further, when the melting / refining process of the melting furnace 20 is performed after discharging the melted material, the cover member 28 is removed from the tap hole 24, the opening / closing gate 27 is closed, and the tap hole 24 is filled with sand.
［考案の効果］ 以上要するに本考案によれば湯出し口に着脱自在に、湯
出し口の下部開口部を覆うと共に、これから所定の長さ
垂下された筒体状のカバー部材を設け、このカバー部材
に不活性ガス供給手段を接続してその内部を不活性ガス
雰囲気にするようにしたので、湯出し口の内壁の黒鉛ブ
ロックの酸化損耗を防止することができ、メンテナンス
を軽減することができる。[Effects of the Invention] In short, according to the present invention, the bottom opening of the tap is detachably attached to the tap, and a cylindrical cover member is hung from the tap to have a predetermined length. Since the inert gas supply means is connected to the member and the inside thereof is made to be the inert gas atmosphere, it is possible to prevent the oxidative wear of the graphite block on the inner wall of the tap hole and to reduce the maintenance. .
また、簡単な装置であるので既設の溶解炉に簡単に適用
することができ、汎用性に富む。In addition, since it is a simple device, it can be easily applied to an existing melting furnace and is highly versatile.
第１図は本考案の溶解炉の炉底出鋼装置を示す要部概略
図、第２図は本考案の溶解炉の炉底出鋼装置のカバー部
材取り付け前の状態を示す要部概略図、第３図は炉底出
鋼式アーク炉を示す概略図、第４図及び第５図は従来の
構造を説明するための要部概略図である。 図中、２０は溶解炉、２３は炉体、２４は湯出し口、２
８はカバー部材、３１は不活性ガス供給手段である。FIG. 1 is a schematic view of a main part showing a furnace bottom tapping device of a melting furnace of the present invention, and FIG. 2 is a schematic view of a main part showing a state of a melting bottom furnace tapping device of the present invention before a cover member is attached. FIG. 3 is a schematic diagram showing a bottom-furnished steel arc furnace, and FIGS. 4 and 5 are schematic diagrams showing essential parts for explaining a conventional structure. In the figure, 20 is a melting furnace, 23 is a furnace body, 24 is a tap hole, 2
Reference numeral 8 is a cover member, and 31 is an inert gas supply means.
Claims (1)
って内装された湯出し口に着脱自在に設けられ、該湯出
し口の下部開口部を覆うと共に、これから所定の長さ垂
下され下端部が開口された筒体状のカバー部材と、該カ
バー部材内を不活性ガス雰囲気にすべくこれに接続され
た不活性ガス供給手段とからなることを特徴とする溶解
炉の炉底出鋼装置。1. A bottom opening of the melting furnace, which is detachably provided in a bottom of the melting port and is internally provided with a graphite block to cover a lower opening of the melting port and to hang a predetermined length therefrom. And a cylindrical cover member having an opening, and an inert gas supply means connected to the cover member so as to create an inert gas atmosphere in the cover member. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2390688U JPH063349Y2 (en) | 1988-02-26 | 1988-02-26 | Furnace bottom tapping device for melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2390688U JPH063349Y2 (en) | 1988-02-26 | 1988-02-26 | Furnace bottom tapping device for melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01136395U JPH01136395U (en) | 1989-09-19 |
| JPH063349Y2 true JPH063349Y2 (en) | 1994-01-26 |
Family
ID=31243293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2390688U Expired - Lifetime JPH063349Y2 (en) | 1988-02-26 | 1988-02-26 | Furnace bottom tapping device for melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063349Y2 (en) |
-
1988
- 1988-02-26 JP JP2390688U patent/JPH063349Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01136395U (en) | 1989-09-19 |
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