JPS5935568Y2 - Furnace mouth hardware for converter - Google Patents

Description

【考案の詳細な説明】 本考案は転炉の炉口金物の改良詳しくは炉口金物のうち
冷却が困難な内周部分の改良に関するものである。[Detailed Description of the Invention] The present invention relates to the improvement of a converter mouthpiece, and more particularly to the improvement of the inner peripheral portion of the furnace mouthpiece, which is difficult to cool.

一般に転炉の炉口金物は鋳鉄あるいは鋳鋼製であって部
分的に冷却水路を内部に有するリング状のものである。In general, the converter head fittings are made of cast iron or cast steel and are ring-shaped and partially have cooling channels inside.

この炉口金物は平面的に見るとその円周を４ないし８等
分に分割された扇形状のものが集合して構成されている
。When viewed from above, this furnace mouthpiece is composed of fan-shaped pieces whose circumference is divided into 4 to 8 equal parts.

炉口金物の転炉の炉体への取付は炉体の上端にある炉口
フランジにボルトあるいはコツター等の締付手段によっ
て行われる。The attachment of the furnace mouth fittings to the furnace body of the converter is carried out by tightening means such as bolts or bolts on the furnace mouth flange at the upper end of the furnace body.

この炉口金物は炉内耐火材を押え、また炉内の溶銑やス
ラグを排出する際炉口部の溶損を防止する機能を有して
いる。This furnace mouth metal has the function of holding down the refractory material in the furnace and preventing melting and damage at the furnace mouth when discharging hot metal and slag from the furnace.

しかしながら転炉設備特有の過酷な操業条件下におかれ
る炉口金物は吹錬中の熱伝導によるだけでなく、溶銑装
入およびスラグ排出の際に溶銑またはスラグに接する、
吹錬中のスロッピングによって飛散したスラグが付着す
るなどのため特に高温にさらされ、侵蝕による損傷も激
しい。However, the furnace mouth metal parts, which are subjected to harsh operating conditions unique to converter equipment, are not only affected by heat conduction during blowing, but also come into contact with hot metal or slag during hot metal charging and slag discharge.
It is exposed to particularly high temperatures due to the adhesion of slag scattered during slopping during blowing, and is subject to severe corrosion damage.

この為炉口金物内に冷却管を設は水を導通し炉口金物を
冷却して寿命をのばすことが行われている。For this reason, a cooling pipe is installed in the furnace mouthpiece to conduct water to cool the furnace mouthpiece and extend its life.

第１図に示すものは炉口金物内に冷却水を導通した従来
の形式のものを示す。The one shown in FIG. 1 is of a conventional type in which cooling water is conducted into the furnace mouthpiece.

１は転炉鉄皮、２は転炉鉄皮に内張すされた耐火レンガ
、３は炉口金物、４は冷却管である。1 is a converter shell, 2 is a refractory brick lined with the converter shell, 3 is a furnace mouth fitting, and 4 is a cooling pipe.

このような炉口金物では、その機能上および製作技術上
形状や寸法に制約を受は内周部付近（第１図のＡの箇所
）まで冷却管を通すことが難しい。In such a furnace mouth metal fitting, it is difficult to pass a cooling pipe to the vicinity of the inner circumference (point A in FIG. 1) due to restrictions on the shape and dimensions due to its function and manufacturing technology.

従ってこの部分における冷却が十分に行い難い。Therefore, it is difficult to cool this portion sufficiently.

その結果この部分は他部に較べ最も早く損傷が進行し、
炉内の耐火レンガライニング層が損耗して薄くなったり
すると熱の影響をさらに大きく受ける。As a result, damage progresses fastest in this area compared to other areas,
If the refractory brick lining inside the furnace becomes worn and thin, it will be more affected by heat.

一方炉口金物そのものが重量的にも寸法、形状的にも大
きなものであるがこれの取替え作業は極力簡便にできる
ことが要求される。On the other hand, although the furnace mouthpiece itself is large in terms of weight, size, and shape, it is required that the replacement work be as simple as possible.

例えば２５０ＴＯＮ／チヤージクラスの転炉の６分割構
造の炉口金物の場合その１個の重量が３ ＴＯＮ、外形
寸法が３ｍ（長さ）ｘｌｍ（幅）ｘｏ、４ｍ （高さ）
にも及ぶ。For example, in the case of a 250 TON/charge class converter with a six-part structure, the weight of each piece is 3 TON, and the external dimensions are 3 m (length) x lm (width) x o, 4 m (height).
It also extends to

その上これらの炉体への装着作業は炉体の上方部に位置
する排ガス処理設備やこれに関連する付帯設備を避けて
行う必要があることから作業能率が低下する上、取替え
作業用設備もかなり大がかりなものが必要とされ、多大
の時間と労力を費すという欠点を有している。Furthermore, installation work to the furnace body must be carried out while avoiding the exhaust gas treatment equipment located above the furnace body and related auxiliary equipment, which reduces work efficiency and requires replacement equipment. It has the disadvantage that it requires a fairly large-scale device and requires a lot of time and effort.

又、炉口金物３の取替えの都度冷却管４の取付フランジ
８の接続作業も必要であり、これらを人手作業に委ねね
ばならぬ不都合がある。Furthermore, each time the furnace mouth fittings 3 are replaced, it is necessary to connect the mounting flange 8 of the cooling pipe 4, which is inconvenient as it must be left to manual labor.

本考案は上記の問題点に鑑み炉口金物の内周部を炉口金
物から分離した構造とし、損傷の激しいその内周部の取
外しが容易にできるように改良したものである。In view of the above-mentioned problems, the present invention provides a structure in which the inner peripheral part of the furnace mouthpiece is separated from the furnace mouthpiece, and is improved so that the inner peripheral part, which is often damaged, can be easily removed.

本考案の実施例を図によって説明する。An embodiment of the present invention will be described with reference to the drawings.

転炉上部断面を示す第２図において炉口金物３はその内
周部に設けられたほぼ同じ肉厚のリングプレートト５と
炉頂金物７とからなり後者は炉体１上端部に設けられた
炉口フランジ９にボルトにて締結されている。In FIG. 2 showing a cross section of the upper part of the converter, the furnace mouth metal fittings 3 consist of a ring plate 5 and a furnace top metal fitting 7, which are provided on the inner periphery and have approximately the same thickness, and the latter is provided at the upper end of the furnace body 1. It is fastened to the furnace mouth flange 9 with bolts.

冷却管４は第３図に示すようにフランジ８を介して炉体
外の冷却配管４′と接続されている。The cooling pipe 4 is connected to a cooling pipe 4' outside the furnace body via a flange 8, as shown in FIG.

この炉頂金物７は内周部を除いては従来の水冷式炉口金
物と同様の形状を有するものでよい。The furnace top metal fitting 7 may have the same shape as a conventional water-cooled furnace head metal fitting except for the inner peripheral portion.

ノングプレート５の炉頂金物７への取付けは、炉頂金物
７の内周部にＬ字形状の断面部を形成し、他方リングプ
レート５の外周部にも前記炉頂金物７のＬ字形状断面に
係合するＬ字形断面部を形成し、これを嵌着し取付ボル
ト６にて固定して行なわれる。To attach the ring plate 5 to the furnace top hardware 7, an L-shaped cross section is formed on the inner circumference of the furnace top metal 7, and an L-shaped cross section of the furnace top metal 7 is formed on the outer periphery of the ring plate 5. This is done by forming an L-shaped cross-section that engages with the shaped cross-section, fitting the L-shaped cross-section, and fixing it with a mounting bolt 6.

なお、係合は第３図とは逆にリングプレートを上から嵌
着する構成としても良いが、取付はボルトに作用する力
を考慮すると第３図の嵌着が望しい。The ring plate may be engaged from above, contrary to the configuration shown in FIG. 3, but the fitting shown in FIG. 3 is preferable in consideration of the force acting on the bolts.

このＬ字形断面部の保合部は第４図に示すように炉頂金
物７とリングプレート５の全周にわたって形成してもよ
いし、第５図のように部分的に設けてもよい。This L-shaped cross-sectional retaining portion may be formed over the entire circumference of the furnace top metal fitting 7 and the ring plate 5 as shown in FIG. 4, or may be provided partially as shown in FIG.

両者の組合せ方法として第４図および第５図に示すよう
に炉頂金物７の分割位置とリングプレート５の分割位置
とをずらせて取付けてもよい。As a method of combining the two, as shown in FIGS. 4 and 5, the dividing position of the furnace top metal fitting 7 and the dividing position of the ring plate 5 may be shifted from each other.

炉頂金物７にリングプレート５を取付けた後炉内耐火材
２を施工するとリングプレート５は耐火材、Ｌ字形保合
部、および各リングプレートの扇形片の端面間の接触に
よってその脱落が防止される。When the in-furnace refractory material 2 is installed after the ring plate 5 is attached to the furnace top hardware 7, the ring plate 5 is prevented from falling off due to the contact between the refractory material, the L-shaped retaining portion, and the end faces of the fan-shaped pieces of each ring plate. be done.

取付ボルト６は炉内耐火材２を除去する時に、リングプ
レート５が落下する危険を防止する機能をも併せて持つ
ものである。The mounting bolts 6 also have the function of preventing the ring plate 5 from falling when the refractory material 2 in the furnace is removed.

従ってこのボルト６はリングプレート５の重量を支持で
きる程度のものでよい。Therefore, the bolts 6 need only be of a size that can support the weight of the ring plate 5.

炉頂金物７とリングプレート５の保合部の間隙には必要
に応じ不定形耐火物等を充填し、間部への地金付着現象
を緩和させることもできる。The gap between the retaining portion of the furnace top hardware 7 and the ring plate 5 may be filled with a monolithic refractory or the like, if necessary, to alleviate the phenomenon of metal adhesion to the gap.

なお、ボルトの頭の位置が炉頂金物７の上側にくると噴
出したスラグ等にボルトが埋ってしまって後の取外しが
困難になるので炉頂金物７の下側にボルトの頭がくるよ
うにする。Note that if the head of the bolt is above the furnace top metal fitting 7, the bolt will become buried in the spouted slag, etc., making it difficult to remove it later. Make it.

炉頂金物７とリングプレート５の保合部を第３図のよう
にＬ型断面とすると係合作業が容易になる利点がある。If the retaining portion between the furnace top metal fitting 7 and the ring plate 5 has an L-shaped cross section as shown in FIG. 3, there is an advantage that the engaging operation becomes easier.

上述のように本考案によれば早期補修を要する炉口部耐
火レンガの換装時に炉口金物のうち最も損傷の激しいリ
ングプレート５のみを分離して取替えることができるよ
うにしたので従来の炉口金物に較べて取替え重量ははる
かに少なく、また冷却管の接続作業も不要であるため、
その取替え作業が非常に簡便となる。As mentioned above, according to the present invention, only the ring plate 5, which is the most severely damaged part of the furnace mouth fittings, can be separated and replaced when replacing the furnace mouth refractory bricks that require early repair. Compared to hardware, replacement weight is much less, and there is no need to connect cooling pipes, so
The replacement work becomes very simple.

又、比較的損傷を受けることの少ない炉頂金物はその寿
命の続く限り使用でき、従来の炉口金物を使用した場合
より圧倒的に経費も少なくなるという効果がある。Further, the furnace top hardware, which is relatively less susceptible to damage, can be used for as long as its life span, and has the effect of significantly lower costs than when using conventional furnace head hardware.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の炉口金物を転炉に装着した場合の炉口付
近の一部を示す断面図、第２図は本考案による炉口金物
の全体を示す転炉上部の断面図、第３図は本考案の要部
拡大断面図、第４図は転炉炉頂部の部分平面図、第５図
は他の実施例を示す転炉炉頂部の部分平面図である。 １・・・・・・転炉鉄皮、２・・・・・・耐火レンガ、
３・・・・・・炉口金物、４，４′・・・・・・冷却管
、５・・・・・・リングプレート、６・・・・・・ボル
ト、７・・・・・・炉頂金物、８・・・・・・冷却管の
フランジ、９・・・・・・炉口フランジ。Fig. 1 is a sectional view showing a part of the vicinity of the furnace opening when a conventional furnace fitting is installed in the converter; Fig. 2 is a sectional view of the upper part of the converter showing the entire furnace fitting according to the present invention; 3 is an enlarged sectional view of the main part of the present invention, FIG. 4 is a partial plan view of the top of the converter furnace, and FIG. 5 is a partial plan view of the top of the converter furnace showing another embodiment. 1...Converter steel skin, 2...Refractory brick,
3... Furnace mouth hardware, 4, 4'... Cooling pipe, 5... Ring plate, 6... Bolt, 7... Furnace top hardware, 8... Cooling pipe flange, 9... Furnace mouth flange.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 炉口金物は複数個に分割された炉頂金物および該炉頂金
物の内周部に設けられ該内周部とほぼ同じ肉厚のリング
プレートより成り、炉頂金物の内周部にはＬ字形係合部
をその係合面が下向きになるよう形成し、リングプレー
トの外周部には前記炉頂金物のＬ字形保合部に係合する
Ｌ字形保合部を設け、上記保合部においてリングプレー
トの下面よりポルＩ・により締結したことを特徴とする
転炉用炉口金物。The furnace mouthpiece consists of a furnace top metalpiece divided into a plurality of pieces and a ring plate provided on the inner periphery of the furnace top metalpiece and having a wall thickness that is approximately the same as the inner periphery. A letter-shaped engagement part is formed so that its engagement surface faces downward, and an L-shaped engagement part is provided on the outer periphery of the ring plate to engage with the L-shaped engagement part of the furnace top metal. A converter mouth fitting characterized in that the ring plate is fastened from the lower surface of the ring plate with Pol I.