JPS5989980A - Furnace cover of arc furnace for steel manufacture with induction current preventive mechanism - Google Patents
Furnace cover of arc furnace for steel manufacture with induction current preventive mechanismInfo
- Publication number
- JPS5989980A JPS5989980A JP18462783A JP18462783A JPS5989980A JP S5989980 A JPS5989980 A JP S5989980A JP 18462783 A JP18462783 A JP 18462783A JP 18462783 A JP18462783 A JP 18462783A JP S5989980 A JPS5989980 A JP S5989980A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- ceiling
- arc furnace
- induction current
- steel manufacture
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 この発明は新規な製鋼用電弧炉の炉蓋の提供に係わる。[Detailed description of the invention] The present invention relates to the provision of a novel furnace cover for an electric arc furnace for steelmaking.
製鋼用電弧炉においては生産性向上のだめの炉蓋の大型
化、酸素！！鋼の採用、大電力の投入などが普及され、
高温迅速溶解に移行している。In electric arc furnaces for steelmaking, increasing the size of the furnace lid and oxygen are the key to improving productivity! ! The use of steel and the input of large amounts of electricity became widespread.
There is a shift to high temperature rapid melting.
かかる炉内のＫ ’１１４化に伴い、窯炉用耐火物につ
いても種々改良、開発が行なわれている、しかし、耐火
物の損傷はその使用位置でも異なるが、高温による溶解
やスプラッシュ等による侵食と機械的、熱的および構造
的なスポーリングによるものが主因となっており、耐火
物の改良は、この侵食とスポーリングを主眼として研究
されるも侵食機構とスポーリング機構とは相反する一面
をもち、抜群の面１食性をもつ耐火物で耐スポーリング
性に劣る例がある。Along with the introduction of K '114 inside furnaces, various improvements and developments have been made to refractories for kilns.However, damage to refractories varies depending on the location of use, but damage to refractories may occur due to melting due to high temperatures or erosion due to splash, etc. The main causes are mechanical, thermal, and structural spalling, and although research on improving refractories focuses on this erosion and spalling, the erosion and spalling mechanisms are contradictory. There are examples of refractories with excellent surface corrosion resistance, but with poor spalling resistance.
このように、製鋼法の革新に対応にすべく耐火物でも種
々の研究を行うも必ずしも追随し得てないのが現状であ
る、
実際には、急熱急冷を伴う高温操業下での電弧炉炉蓋劇
人物は特別な築造方法を行っても、せいぜい動ｊ用回数
１００〜４００ＪＭ程度でもって廃却ぜれ、新しい耐火
物゛がライニングされねばならない３、
そこで、竹に高温に対しての処置として電弧炉炉蓋にお
いては水冷化が検討実施されている。In this way, although various researches have been conducted on refractories in order to respond to innovations in steel manufacturing methods, the current situation is that they are not necessarily able to follow suit. Even if a special construction method is used for the hearth drama figure, it will be disposed of after being used for 100 to 400 JM at most, and a new refractory must be lined with it3. As a countermeasure, water cooling is being considered for the electric arc furnace lid.
炉蓋は通常の場合、３個所の電極孔を有する小天井（別
名、炉頂部）と集じん孔１合金投入口などを有する大天
井（別名、外周部）とに位置別に分類され、現在水冷装
置が設置されている所はその殆んどは大天井部分で種々
の型式が窯炉で使用これているが、小天井部分はキャス
タブルやラミング材の不定形又は塩基性高アルミナ質定
形れんがおよびこの併用でライニングされ、大天井に接
する小天井部の外端にはその全周にかつ天井厚さ大部分
に亘って水冷式ボックス枠が形成されたものが使用でれ
ている。そして小天井部或いは全天井の寿命延長や調和
を図るため、小天井部を交換する方式が一般的になって
来ている。Furnace lids are usually classified by location into a small ceiling (also known as the top of the furnace) that has three electrode holes, and a large ceiling (also known as the outer periphery) that has dust collection holes and one alloy inlet. Most of the places where the equipment is installed are large ceilings, where various types of kilns are used, but small ceilings are made of castable or rammed irregular shaped bricks or basic high alumina shaped bricks. A water-cooled box frame is used that is lined with this combination, and a water-cooled box frame is formed around the entire circumference and over most of the thickness of the ceiling at the outer end of the small ceiling part that contacts the large ceiling. In order to extend the lifespan and harmonize the small ceiling part or the entire ceiling, it has become common to replace the small ceiling part.
特に電磁に近い小天井周囲の例えば水冷式ボックスはそ
の拐質が鉄環磁性金属であるため誘導電流が発生し、ス
パーク又は自己加熱により破損する危険性を有していた
。そこで本考案はとのＪ：うな問題点を解消するもので
そのを旨は大天井部と小天井部とが分離可能な電弧炉に
おいて、小天井部の外端あるいは大天井の内端部分に形
成でれる枠が円周方向一部分に電気絶縁体又は非磁性金
属が介在するか又は非磁性金属からなるとして、誘導電
流防止機栴を備えた製鋼用電弧炉の炉蓋を提供するもの
でちる。In particular, water-cooled boxes located around small ceilings that are close to electromagnetic sources are made of iron-ringed magnetic metal, so there is a risk of them being damaged by sparks or self-heating due to the generation of induced currents. Therefore, the present invention is to solve the above problem.The purpose is to provide an electric arc furnace in which the large ceiling part and the small ceiling part are separable. This invention provides a furnace cover for an electric arc furnace for steelmaking that is equipped with an induced current prevention mechanism, where the formed frame has an electric insulator or a non-magnetic metal interposed in a circumferential portion thereof, or is made of a non-magnetic metal. .
以下、これを実施例にもとづいて説明する。This will be explained below based on an example.
第１図は本発明炉蓋の分離態様を、第２図は嵌合セット
態様を、第３図はその平面図を夫々示し、図中１はルー
フリング、２は該図では水冷ブロックでもって構成した
例で示す大天井、３は大天井水冷ブロック吊り金物、４
は該大天井２と分離構造に構成でれたところの本発明の
小天井で、これば、小天井耐火物層５が大天井２と接合
する外周側面に小天井水冷式ボックス枠６を囲繞配設し
てなる。Fig. 1 shows the separation mode of the furnace cover of the present invention, Fig. 2 shows the fitted and set mode, and Fig. 3 shows its plan view. In the figure, 1 is a roof ring, and 2 is a water cooling block. The large ceiling shown in the configured example, 3 is the large ceiling water cooling block hanging hardware, 4
1 is a small ceiling of the present invention which has a separate structure from the large ceiling 2, in which a small ceiling refractory layer 5 surrounds a small ceiling water-cooled box frame 6 on the outer circumferential side where it joins with the large ceiling 2. It will be arranged.
当該小天井水冷式ボーツクス枠６は一部で縁切シする等
の処置を施こすものである。これを第４図各図に示す、
すなわち、Ａ図は鉄製で欠円体とし、当該欠内部７には
不定形耐火物層、例えばモルタル目地やキャスタブル層
や無機センイ層を目詰充填するものとするかあるいはス
テンレス等の非磁性金属におき換えるものとした場合を
示し、Ｂ図は分割体とし、各縁切り部８・・・にＡ図と
同様の処置を施こした場合を示し、０図は非磁性金属で
一体連続物とした場合を夫々示す。The small ceiling water-cooled box frame 6 has undergone some treatment such as cutting off the edges. This is shown in Fig. 4. In other words, Fig. A shows a hollow circle made of iron, and the hollow interior 7 is filled with a monolithic refractory layer, such as a mortar joint, a castable layer, or an inorganic fiber layer. or replace it with a non-magnetic metal such as stainless steel. Figure B shows the case where the body is divided and each edge cut part 8 is treated in the same manner as in Figure A. The figures show cases in which the non-magnetic metal is made into an integral continuous object.
５図は小天井４を大天井２に対して直接遺愛けはせずに
枠６より延設の鍔部２２をルーフリングｌより延設のア
ーム２１で受止するものである。In Fig. 5, the small ceiling 4 is not directly attached to the large ceiling 2, but a flange 22 extending from the frame 6 is received by an arm 21 extending from the roof ring l.
非磁性金属の例としてはｖｉｆ記スナステンレスに銅、
銅合金等でも良い。Examples of non-magnetic metals include vif stainless steel, copper,
Copper alloy or the like may also be used.
以上の構成によって枠の鉄製環状体の一部が断ち切られ
て、或いは非磁性の環状体であるため、これらにより誘
導電流の発生を防止出来る。With the above configuration, a part of the iron annular body of the frame is cut off or is a non-magnetic annular body, so that generation of induced current can be prevented.
従って誘導電流発生に伴う水冷ボックスの破損等の事故
を防止し、延いては炉蓋寿命の延長を図ることが出来る
。Therefore, accidents such as damage to the water cooling box due to the generation of induced current can be prevented, and the life of the furnace lid can be extended.
第１図は炉蓋の分離態様の縦断面図、第２図は嵌倉セッ
ト態様の縦断面図、第３図は平面図、第４図の各図は本
発明実施例を示す平面図、第５図は炉蓋全体の縦断面図
である。
ｌ・・・ルーフリング、２・・・大天井、３・・・吊り
金物、４・・・小天井、５・・・小天井耐火物層、６・
・・小天井水冷式ボックス枠、７・・・欠内部、８・・
・縁切り部、２１・・・アーム、２２・・・鍔部。
ラ／Ａの
４
ブクブ、塑
ブタΔｑFIG. 1 is a vertical cross-sectional view of the furnace cover in a separated form, FIG. 2 is a vertical cross-sectional view of the cage set form, FIG. FIG. 5 is a longitudinal sectional view of the entire furnace lid. l... Roof ring, 2... Large ceiling, 3... Hanging hardware, 4... Small ceiling, 5... Small ceiling refractory layer, 6...
...Small ceiling water-cooled box frame, 7...Cut out inside, 8...
- Edge cutting part, 21... arm, 22... collar part. La/A's 4 Bukubu, plastic pig Δq
Claims (1)
天井部の外端あるいは大天井の内端部分に形成でれる枠
が円周方向一部分に電気絶縁体又は非磁性金属が介在す
るか又は非磁性金属からなることを特徴とする誘導電流
防止機構をｆ＋Ｎｉえる製鋼用電弧炉の炉蓋。In an electric arc furnace in which a large ceiling part and a small ceiling part can be separated, the frame formed at the outer end of the small ceiling part or the inner end part of the large ceiling part has an electrical insulator or non-magnetic metal interposed in a part of the circumference. A furnace lid of an electric arc furnace for steelmaking which is equipped with an induced current prevention mechanism characterized by being made of a non-magnetic metal or a non-magnetic metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18462783A JPS5989980A (en) | 1983-10-03 | 1983-10-03 | Furnace cover of arc furnace for steel manufacture with induction current preventive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18462783A JPS5989980A (en) | 1983-10-03 | 1983-10-03 | Furnace cover of arc furnace for steel manufacture with induction current preventive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5989980A true JPS5989980A (en) | 1984-05-24 |
Family
ID=16156537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18462783A Pending JPS5989980A (en) | 1983-10-03 | 1983-10-03 | Furnace cover of arc furnace for steel manufacture with induction current preventive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5989980A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6163695U (en) * | 1984-09-28 | 1986-04-30 | ||
| JPH04125196U (en) * | 1991-04-26 | 1992-11-16 | 品川白煉瓦株式会社 | electric furnace lid |
| JP2002522744A (en) * | 1998-08-13 | 2002-07-23 | ユーカー、カーボン、テクノロジー、コーポレーション | Integrated spray-cooled furnace roof and smoke elbow |
| EP1881285A1 (en) * | 2006-07-20 | 2008-01-23 | Vesuvius Crucible Company | Ceiling of an electric arc furnace and central part thereof |
| US9453679B2 (en) * | 2011-03-14 | 2016-09-27 | Refractory Intellectual Property Gmbh & Co. Kg | Industrial furnace cover |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5255449U (en) * | 1975-10-20 | 1977-04-21 |
-
1983
- 1983-10-03 JP JP18462783A patent/JPS5989980A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5255449U (en) * | 1975-10-20 | 1977-04-21 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6163695U (en) * | 1984-09-28 | 1986-04-30 | ||
| JPH04125196U (en) * | 1991-04-26 | 1992-11-16 | 品川白煉瓦株式会社 | electric furnace lid |
| JP2002522744A (en) * | 1998-08-13 | 2002-07-23 | ユーカー、カーボン、テクノロジー、コーポレーション | Integrated spray-cooled furnace roof and smoke elbow |
| EP1881285A1 (en) * | 2006-07-20 | 2008-01-23 | Vesuvius Crucible Company | Ceiling of an electric arc furnace and central part thereof |
| WO2008009468A1 (en) * | 2006-07-20 | 2008-01-24 | Vesuvius Crucible Company | Electric arc furnace roof top and central portion for this roof top |
| US9453679B2 (en) * | 2011-03-14 | 2016-09-27 | Refractory Intellectual Property Gmbh & Co. Kg | Industrial furnace cover |
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