JP2549169B2 - Hot repair material - Google Patents
Hot repair materialInfo
- Publication number
- JP2549169B2 JP2549169B2 JP1044725A JP4472589A JP2549169B2 JP 2549169 B2 JP2549169 B2 JP 2549169B2 JP 1044725 A JP1044725 A JP 1044725A JP 4472589 A JP4472589 A JP 4472589A JP 2549169 B2 JP2549169 B2 JP 2549169B2
- Authority
- JP
- Japan
- Prior art keywords
- repair material
- hot repair
- furnace
- pitch
- weight
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、転炉、AOD炉、電気炉、取鍋等の各種工
業用炉に使用される熱間補修材に関する。TECHNICAL FIELD The present invention relates to a hot repair material used in various industrial furnaces such as a converter, an AOD furnace, an electric furnace, and a ladle.
近年、工業用炉においては、生産効率を高めるため、
精錬時間や休止時間の短縮等が図られ、使用条件が非常
に過酷になっている。例えば、転炉においては、これら
の要請とともに、鋼の高級化指向の要請に応えるため、
上下吹き精錬が多用されるようになってきており、内張
り耐火物の寿命が短くなっている。特に、炉底、羽口周
辺においては著しい内張りの損傷が見られる。In recent years, in industrial furnaces, in order to improve production efficiency,
The refining time and downtime have been shortened and the usage conditions have become extremely severe. For example, in the case of a converter, in order to meet these demands, as well as to meet the demands for higher grade steel,
Top-bottom blow refining is becoming more and more used, and the life of refractory linings is shortened. In particular, significant lining damage is seen around the furnace bottom and tuyere.
従来、このような炉の部分的損傷が発生した場合に
は、炉の休止時の高温雰囲気下に補修材を投入し、炉熱
で補修材を焼き付けること、即ち、熱間補修により炉の
寿命の延長が図られている。Conventionally, when such partial damage of the furnace occurs, the repair material is put into a high temperature atmosphere when the furnace is at rest, and the repair material is baked by the heat of the furnace, that is, the life of the furnace is improved by hot repair. Is being extended.
以上のような熱間補修材に対しては、炉内への投入
後、速やかに軟化して損傷箇所に拡がるような初期流動
性と、該軟化によって被覆した損傷箇所に対して高い強
度で付着（焼付）する焼付性との両特性を満足すること
が求められており、このような特性を熱間補修材に付与
するために後述するようなピッチもしくはタール等の炭
素質原料が配合されている。これら炭素質原料は炉熱を
受けて軟化し、骨材粒子とともに流動して速やかに損傷
箇所を被覆するとともに、所定時間の経過後には揮発分
の消失による炭素結合で所要の焼付性を確保するように
している。For the above hot repair materials, after being put into the furnace, it adheres with high strength to the damaged area covered by the softening and the initial fluidity that quickly softens and spreads to the damaged area. It is required to satisfy both the characteristics of (seizure) and the seizure property, and in order to impart such characteristics to the hot repair material, a carbonaceous raw material such as pitch or tar as described below is blended. There is. These carbonaceous raw materials are softened by the heat of the furnace, flow with aggregate particles to quickly cover the damaged area, and after the lapse of a predetermined time, the carbon bond due to the disappearance of volatile components ensures the required seizure property. I am trying.
また上記熱間補修材は投入作業の取扱いを考慮して、
混練後の原料を所定量ずつ纏まった塊状（例えばいわゆ
る「豆炭」に見られるような形状）に成形（造塊）され
る場合があり、このような造塊作業が容易で、しかも炉
内投入時に上記造塊後の熱間補修材の型崩れを起こり難
くするための保形性も併せて要求される。In addition, considering the handling of the charging work, the above hot repair material
The kneaded raw materials may be formed into a lump (a shape similar to what is called “bean charcoal”) that is collected in a predetermined amount. This kind of lump formation is easy and can be put into the furnace. At the same time, shape retention is also required to make it difficult for the hot repair material to lose its shape after the above-mentioned ingot formation.
熱間補修に使用される熱間補修材としては、例えば、
マグネシア、ドロマイト等の耐火原料にタール、ピッチ
等を添加し、加熱混練したものが知られている。As the hot repair material used for hot repair, for example,
It is known that a refractory raw material such as magnesia or dolomite is added with tar, pitch or the like and heated and kneaded.
また、例えば特開昭63−139068号公報に開示されてい
るように、粒状のフェノール樹脂と粒状のピッチとを併
用し、フェノール樹脂を溶解し、かつ、フェノール樹脂
及びピッチの軟化点より低い沸点を有する有機溶剤を添
加混合したものが提案されている。Further, for example, as disclosed in JP-A-63-139068, a granular phenol resin and a granular pitch are used in combination, the phenol resin is dissolved, and the boiling point is lower than the softening point of the phenol resin and the pitch. It has been proposed to add and mix an organic solvent having
ところで、生産効率を高めることが一層強く要求され
ている今日では、炉の休止期間をできるだけ短縮して炉
の稼働率を高めるとともに、炉熱をできるだけ有効に次
回の精錬に利用することが求められている。このため、
休止時の炉の補修についても補修時間を短縮することが
次第に強く求められるようになっている。Nowadays, there is a strong demand for higher production efficiency, and it is required to shorten the downtime of the furnace as much as possible to increase the operating rate of the furnace and use the furnace heat as effectively as possible for the next refining. ing. For this reason,
There is also an increasing demand for shortening the repair time for repairing furnaces at rest.
しかしながら、従来のタール、ピッチ等をバインダと
する熱間補修材、あるいは、粒状のフェノール樹脂と粒
状のピッチとを併用する熱間補修材は、焼付速度が遅
く、補修時間の短縮を図るという観点からは大きな不満
が感じられている。そこで、炉熱による焼付が不十分な
状態で操業に入り、操業中の熱により焼付を進行させる
ことを着想し、試みたのであるが、この場合には操業に
入ってから短時間の内に補修材の剥離及び脱落が発生
し、補修効果を喪失してしまうことが分かった。However, the conventional hot repair material using tar, pitch, etc. as a binder, or the hot repair material using a granular phenol resin and granular pitch together has a slow baking speed, and is aimed at shortening the repair time. I feel a lot of dissatisfaction. Therefore, the idea was to start operation with insufficient baking due to furnace heat, and to proceed with baking with the heat during operation, but in this case, within a short time after starting operation. It was found that the repair material peeled and fell off, and the repair effect was lost.
さらに上記焼付速度を改善するために特開昭53−7520
7号公報に記載されたように、モールドを使用し築炉に
適した形状に成形されることを前提とした耐火れんがの
原料に添加することにより、上記タール，ピッチ等の炭
素質原料の重合を促進し、焼付性だけを向上させること
も可能である。Further, in order to improve the above-mentioned printing speed, JP-A-53-7520
As described in Japanese Patent Publication No. 7, the polymerization of carbonaceous raw materials such as tar and pitch by adding to the raw material of refractory bricks, which is premised to be formed into a shape suitable for furnace construction using a mold. It is also possible to promote the heat treatment and improve only the seizure property.
しかしながら、上記特開昭53−75207号公報に記載の
発明は上記成形の後に乾燥もしくは焼成されることを前
提としており、このような発明の熱間補修材にそのまま
適用すると、上記硫黄の作用によって初期流動性が低下
することになる。However, the invention described in JP-A-53-75207 is premised on being dried or fired after the above-mentioned molding, and if it is directly applied to the hot repair material of such an invention, it is affected by the action of sulfur. The initial liquidity will decrease.
特に熱間補修材における炭素質原料（タール，ピッ
チ）は既述のように炉投入直後より骨材粒子を速やかに
損傷箇所に流動させる役割を担うところから、上記特開
昭53−75207号公報に記載のピッチよりも多量に配合さ
れるため、上記傾向が顕著となり、直ちに採用し難い側
面がある。In particular, the carbonaceous raw material (tar, pitch) in the hot repair material plays a role of causing the aggregate particles to quickly flow to the damaged portion immediately after the furnace is charged as described above. Since a larger amount than the pitch described in (3) is blended, the above tendency becomes remarkable, and it is difficult to immediately adopt.
この発明は上記の事情に鑑みてなされたものであり、
炉内投入直後の初期流動性を良好に保ちつつ、焼付まで
の時間を短縮できる良好な焼付性を備え、さらに投入前
に付与された所定の形状を良好に保持することを目的と
するものである。The present invention has been made in view of the above circumstances,
While maintaining good initial fluidity immediately after charging in the furnace, it has a good bakeability that can shorten the time until baking, and is intended to maintain a predetermined shape that was given before charging well. is there.
この発明は、原料の混練後、ベーキング処理を行うこ
となく炉へ投入される熱間補修材に適用されるものであ
って、塩基性骨材60〜90重量％、固形ピッチ15〜40重量
％、および粉末硫黄を外掛け0.05〜1.5重量％を含むも
のである。The present invention is applied to a hot repair material which is kneaded into raw materials and then put into a furnace without performing a baking treatment, wherein the basic aggregate is 60 to 90% by weight and the solid pitch is 15 to 40% by weight. , And powdered sulfur to the outside of 0.05 to 1.5% by weight.
また、湿潤剤として液状フェノール樹脂、エチレング
リコール等の多価アルコール、灯油、重油、アントラセ
ン油、水のうちの少なくとも１種を外掛け２〜10重量％
添加することも望ましい。Further, as a wetting agent, at least one kind of liquid phenol resin, polyhydric alcohol such as ethylene glycol, kerosene, heavy oil, anthracene oil, and water is externally applied to 2 to 10% by weight.
It is also desirable to add.
この発明において使用する塩基性骨材は、一般的に塩
基性骨材として使用されているものを使用すればよく、
例えば、マグネシアクリンカー、ドロマイトクリンカ
ー、スピネルクリンカー、マグクロクリンカーあるいは
それらの電融品等がその例として挙げられる。The basic aggregate used in this invention may be one generally used as a basic aggregate,
Examples thereof include magnesia clinker, dolomite clinker, spinel clinker, magcro clinker, and electromelted products thereof.
また、この発明において、固形ピッチは補修材を損傷
箇所に付着させるときには補修材の流動性を高める流動
化剤として作用する。即ち、固形ピッチは炉熱によって
加熱されることにより、軟化して補修材の高い流動性を
与えることになる。また、固形ピッチは、焼付が進行す
るにつれて揮発分が揮発して固化するとともに、炭化し
て行き、結合剤として作用する。Further, in the present invention, the solid pitch acts as a fluidizing agent that enhances the fluidity of the repair material when the repair material is attached to the damaged portion. That is, the solid pitch is softened by being heated by the heat of the furnace to give the repair material high fluidity. Further, the solid pitch functions as a binder as the volatile components are volatilized and solidified as the baking proceeds and carbonized.
以上のように本発明で規定する固形ピッチは、炉内投
入直後の初期流動性と炉底（壁）に対する焼付性とを保
障することはもちろんのこと、後述する湿潤剤とともに
配合することにより、混練後の坏土に適度の粘度を付与
し、炉内投入作業に先立って成形される塊状の熱間補修
材の保形性を向上させる作用をも奏する。尚、上記固形
ピッチに代えて液状ピッチ（予熱されたコールタールピ
ッチ）を用いると、坏土の粘度が低下するため成形後の
保形性が著しく損なわれ、好ましくない。As described above, the solid pitch defined in the present invention not only ensures the initial fluidity immediately after being introduced into the furnace and the seizure property with respect to the furnace bottom (wall), but by blending with the wetting agent described later, The kneaded material after kneading is given an appropriate viscosity, and also has the effect of improving the shape retention of the lump-shaped hot repair material formed prior to the operation of charging into the furnace. If liquid pitch (preheated coal tar pitch) is used in place of the solid pitch, the viscosity of the kneaded material is reduced, and the shape retention after molding is significantly impaired, which is not preferable.
固形ピッチの添加量は10〜40重量％とすることが好ま
しい。固形ピッチの添加量が10重量％よりも少ない場合
には、補修材の流動性が不十分になり、塊状になって損
傷部分を広く覆えなくなり、また、熱間強度が低くなる
ので好ましくない。また、固形ピッチの添加量が40重量
％よりも多い場合には、気孔率が高くなり、耐食性が低
下するので好ましくない。The addition amount of solid pitch is preferably 10 to 40% by weight. If the addition amount of the solid pitch is less than 10% by weight, the fluidity of the repair material becomes insufficient, the repair material becomes lumpy and the damaged portion cannot be widely covered, and the hot strength becomes low, which is not preferable. Further, if the addition amount of the solid pitch is more than 40% by weight, the porosity increases and the corrosion resistance decreases, which is not preferable.
更に、この発明において、粉末硫黄はピッチの重合を
促進し、ピッチの固化を速め、また、焼付後の強度を高
める働きをする。Further, in the present invention, the powdered sulfur functions to promote the polymerization of pitch, accelerate the solidification of pitch, and enhance the strength after baking.
粉末硫黄の添加量は、0.05〜1.5重量％が好ましい。
粉末硫黄の添加量が0.05重量％よりも少ない場合は、そ
の効果が薄く、特に、焼付後の強度を高める効果が著し
く低下するので好ましくない。また、粉末硫黄の添加量
が1.5重量％よりも多い場合には流動性が著しく低下す
るので好ましくない。The amount of powdered sulfur added is preferably 0.05 to 1.5% by weight.
If the amount of powdered sulfur added is less than 0.05% by weight, the effect is small, and particularly the effect of increasing the strength after baking is significantly reduced, which is not preferable. Further, if the amount of powdered sulfur added is more than 1.5% by weight, the fluidity is significantly reduced, which is not preferable.
なお、この発明に係る熱間補修材は、塩基性骨材、固
形ピッチ及び粉末硫黄を混合し、成形した後、使用に供
される。The hot repair material according to the present invention is used after being mixed with a basic aggregate, solid pitch and powdered sulfur and molded.
この発明において、湿潤剤を添加することは妨げな
い。In this invention, the addition of wetting agents is not hindered.
湿潤剤としては、液状フェノール樹脂、エチレングリ
コール等の多価アルコール、灯油、重油、アントラセン
油、水の内の１種を単独で使用してもよく、また、これ
らのうちの２種以上を併用してもよい。As the wetting agent, one of liquid phenol resin, polyhydric alcohol such as ethylene glycol, kerosene, heavy oil, anthracene oil and water may be used alone, or two or more of them may be used in combination. You may.
この湿潤剤の合計添加量は２〜10重量％とすることが
好ましい。湿潤剤の合計添加量が２重量％よりも少ない
場合は投入前の造塊作業に支障を来すので好ましくな
く、10重量％より多い場合には補修材の軟化が著しくな
り、成形後の保形性が著しく損なわれるので好ましくな
い。The total amount of the wetting agent added is preferably 2 to 10% by weight. If the total amount of the wetting agent added is less than 2% by weight, it hinders the ingot-making process before the addition, and if it is more than 10% by weight, the repair material will be significantly softened and will not be retained after molding. This is not preferable because the formability is significantly impaired.
この発明において、湿潤剤として特に液状フェノール
樹脂を使用する場合には、成形後の強度を高めることが
できるので有利であり、また、保湿性も得られる。In the present invention, particularly when a liquid phenol resin is used as the wetting agent, the strength after molding can be increased, which is advantageous, and the moisturizing property can also be obtained.
また、この発明において、湿潤剤として特にエチレン
グリコールを添加する場合には、成形時の充填剤を高め
ることができるとともに、保湿性が得られるので有利で
ある。Further, in the present invention, particularly when ethylene glycol is added as a wetting agent, it is advantageous because the filler at the time of molding can be increased and the moisturizing property can be obtained.
以上のように本発明は上記塩基性骨材、固形ピッチ、
粉末硫黄、を上記の配合で混練することにより、予め造
塊された形態で炉へ投入される熱間補修材の初期流動
性、焼付性を高め、さらに湿潤剤の添加により保形性を
バランスよく、しかも高度に維持することができる。As described above, the present invention is the above basic aggregate, solid pitch,
By kneading powdered sulfur with the above composition, the initial fluidity and seizure of the hot repair material that is put into the furnace in a pre-cast form are improved, and the addition of a wetting agent balances the shape retention. It can be maintained well and highly.
（ａ） 拡がり試験 第１表の実施例１〜５に示す配合組成にしたがって粒
径３〜1mmのマグネシアクリンカー、粒径1mm以下のマグ
ネシアクリンカー、粒径5mm以下のピッチ、粉末硫黄を
配合し、必要に応じてエチレングリコールあるいはこれ
とともに液状フェノール樹脂を添加した後、１辺40mmの
立方体に成形して実施例１〜５に係る各拡がり試験用試
料を得た。(A) Spreading test A magnesia clinker having a particle size of 3 to 1 mm, a magnesia clinker having a particle size of 1 mm or less, a pitch of 5 mm or less, and a powdered sulfur are compounded according to the composition shown in Examples 1 to 5 in Table 1, After adding ethylene glycol or a liquid phenolic resin together with it as required, it was molded into a cube having a side of 40 mm to obtain samples for each spreading test according to Examples 1 to 5.
同様にして、第１表の比較例１または比較例２に示す
配合組成にしたがって粒径３〜1mmのマグネシアクリン
カー、粒径1mm以下のマグネシアクリンカー、粒径5mm以
下のピッチを配合し、必要に応じてエチレングリコール
及び液状フェノール樹脂を添加した後、１辺40mm立方体
に成形して比較例１あるいは２に係る各拡がり試験用試
料を得た。Similarly, a magnesia clinker having a particle diameter of 3 to 1 mm, a magnesia clinker having a particle diameter of 1 mm or less, and a pitch having a particle diameter of 5 mm or less are blended in accordance with the blending composition shown in Comparative Example 1 or Comparative Example 2 in Table 1 as necessary. Then, ethylene glycol and liquid phenol resin were added thereto, and thereafter, each side was molded into a cube of 40 mm to obtain each spreading test sample according to Comparative Example 1 or 2.
このようにして得た実施例１〜５、比較例１及び２に
係る各熱間補修材の拡がり試験用試料をそれぞれ1200℃
の炉内で予熱したルツボＣ内に投入し、1200℃での流動
性を調べる拡がり試験を実施し、第１図に示す結果を得
た。 The spread test samples of the hot repair materials according to Examples 1 to 5 and Comparative Examples 1 and 2 thus obtained were each subjected to 1200 ° C.
Into the crucible C preheated in the furnace of No. 1 and subjected to a spreading test for checking the fluidity at 1200 ° C., the results shown in FIG. 1 were obtained.
第１図から明らかなように、硫黄の添加量が増えると
流動性が低下することが分かる。As is clear from FIG. 1, the fluidity decreases as the amount of sulfur added increases.
なお、この拡がり試験で使用されたルツボＣの形状及
び寸法は第２図に示す通りである。The shape and dimensions of the crucible C used in this spreading test are as shown in FIG.
（ｂ） 強度試験 次に、第１表の実施例４、実施例５に示す配合組成に
したがって粒径３〜1mmのマグネシアクリンカー、粒径1
mm以下のマグネシアクリンカー、粒径5mm以下のピッ
チ、粉末硫黄、エチレングリコールおよび液状フェノー
ルを配合し、77.5mm×40mm×70mmの直方体に成形して実
施例４、実施例５に係る各強度試験用試料を得た。(B) Strength Test Next, according to the composition shown in Example 4 and Example 5 in Table 1, a magnesia clinker having a particle size of 3 to 1 mm and a particle size of 1
mm magnesia clinker of 5 mm or less, pitch of 5 mm or less of particle size, powdered sulfur, ethylene glycol and liquid phenol are mixed and molded into a rectangular parallelepiped of 77.5 mm × 40 mm × 70 mm for each strength test according to Examples 4 and 5. A sample was obtained.
また、第１表の比較例２に示す配合組成にしたがって
粒径３〜1mmのマグネシアクリンカー、粒径1mm以下のマ
グネシアクリンカー、粒径5mm以下のピッチ、エチレン
グリコールおよび液状フェノール樹脂を配合した後、7
7.5mm×40mm×70mmの直方体に成形して比較例２に係る
強度試験用試料を得た。In addition, according to the composition shown in Comparative Example 2 in Table 1, magnesia clinker having a particle diameter of 3 to 1 mm, magnesia clinker having a particle diameter of 1 mm or less, pitch having a particle diameter of 5 mm or less, ethylene glycol, and liquid phenol resin were added, 7
A strength test sample according to Comparative Example 2 was obtained by molding into a rectangular parallelepiped having a size of 7.5 mm × 40 mm × 70 mm.
このようにして得た実施例４、実施例５あるいは比較
例２に係る熱間補修材の各強度試験用試料を1200℃に予
熱した鋳込み型Ｍに投入し、所定時間（ここでは５分、
10分、または20分）保持した後取り出し、１辺40mmの立
方体に切り出して発現強度を測定し、第３図に示す結果
を得た。第３図から明らかなように、実施例４あるいは
実施例５に係る熱間補修材の方が比較例２に係る熱間補
修材に比べて優れていることが分かる。Each strength test sample of the hot repair material according to Example 4, Example 5 or Comparative Example 2 thus obtained was put into a casting mold M preheated to 1200 ° C., and a predetermined time (here, 5 minutes,
After holding for 10 minutes or 20 minutes), it was taken out, cut into a cube having a side of 40 mm, and the expression intensity was measured. The results shown in FIG. 3 were obtained. As is clear from FIG. 3, the hot repair material according to Example 4 or Example 5 is superior to the hot repair material according to Comparative Example 2.
なお、前記鋳込み型Ｍの形状の寸法は第４図に示す通
りである。The dimensions of the shape of the casting mold M are as shown in FIG.
（ｃ） 実用試験 180t上下吹き転炉の補修箇所に第１表の実施例４に示
す配合組成を有する熱間補修材1t投入して焼き付け、そ
の焼き付けに要した時間を測定する一方、焼き付け後に
操業を繰り返してその耐用性を調べた。同様に、180t上
下吹き転炉の補修箇所に第１表の比較例２に示す配合組
成を有する熱間補修材を1t投入して焼き付け、その焼き
付けに要した時間を測定する一方、焼き付け後に操業し
て繰り返してその耐用性を調べた。(C) Practical test 180t A hot repair material having the composition shown in Example 4 of Table 1 was put into the repaired part of the vertical blowing converter and baked, and the time required for the baking was measured. The operation was repeated and the durability was examined. Similarly, 1t of hot repair material having the composition shown in Comparative Example 2 in Table 1 was put into the repaired part of the 180t vertical blowing converter and baked, and the time required for the baking was measured, while the operation after baking was performed. Then, the durability was examined repeatedly.
比較例２に係る熱間補修材によれば、１時間の焼き付
けで使用した場合、３チャージ後には熱間補修材の残存
が認められなくなった。また、２時間の焼き付けで使用
した場合には６チャージ後にも熱間補修材の残存が認め
られた。According to the hot repair material of Comparative Example 2, when the hot repair material was used for one hour of baking, the hot repair material did not remain after 3 charges. Further, when used for baking for 2 hours, the hot repair material was observed to remain even after 6 charges.
これに対して、実施例４に係る熱間補修材では１時間
に焼き付けで使用したにもかかわらず、６チャージ後に
も残存が認められた。On the other hand, the hot repair material of Example 4 was found to remain after 6 charges even though it was baked for 1 hour.
以上のように、本発明の熱間補修材によれば、固形ピ
ッチを15〜40重量％配合することにより、耐久性を損ね
ることなく十分な流動性を得ることができ、損傷箇所を
広く覆うことができる。しかも、粉末硫黄を0.05〜1.5
重量％配合することにより、流動性を得たピッチの重合
を促進し、早期に炭素結合組織を生成させて、強度を増
大させることができる。その結果、焼き付け時間を短縮
して短時間で補修ができるようになるとともに、補修部
分の耐用性を高めることができるので、炉の稼働率が高
められるとともに、その寿命に大幅に延長できる効果が
得られるのである。As described above, according to the hot repair material of the present invention, by blending the solid pitch in an amount of 15 to 40% by weight, it is possible to obtain sufficient fluidity without impairing the durability and widely cover the damaged portion. be able to. Moreover, powder sulfur is 0.05 to 1.5.
By blending the composition in a weight percentage, it is possible to promote the polymerization of the pitch having fluidity, form a carbon bond structure at an early stage, and increase the strength. As a result, the baking time can be shortened and the repair can be done in a short time, and the durability of the repaired part can be improved, so that the operating rate of the furnace can be increased and the life can be greatly extended. You can get it.
さらに湿潤剤を２〜10重量％添加することにより、混
練後の坏土に適度に湿気を与え、容易に造塊されるよう
にするとともに、該造塊後の保形性を高度に維持するこ
とができ、これによって炉への投入作業の作業効率を向
上させることもできる。Furthermore, by adding a wetting agent in an amount of 2 to 10% by weight, the kneaded material after kneading is appropriately moistened so that it can be easily agglomerated, and the shape retention after the agglomeration is maintained at a high level. Therefore, it is possible to improve the work efficiency of the charging work into the furnace.
第１図は実施例１〜５、比較列１及び比較例２の拡がり
試験の結果を示す特性図であり、第２図はその拡がり試
験に使用する試料及びルツボの形状と寸法を示す斜視
図、第３図は実施例４、実施例５及び比較例２の強度試
験の結果を示す特性図、第４図は強度試験用試料及び鋳
込み型の形状と寸法を示す斜視図である。FIG. 1 is a characteristic diagram showing the results of the spreading test of Examples 1 to 5, Comparative Row 1 and Comparative Example 2, and FIG. 2 is a perspective view showing the shape and dimensions of the sample and crucible used in the spreading test. FIG. 3 is a characteristic diagram showing the results of the strength test of Examples 4, 5 and Comparative Example 2, and FIG. 4 is a perspective view showing the shapes and dimensions of the strength test sample and the casting mold.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小口 征男 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 川上 辰男 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 吉田 勉 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 奥田 治志 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (56)参考文献 特開 昭53−75207（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Oguchi 2 1576, Higashi-oki, Aki, Ako-shi, Hyogo Prefecture 2 Kawasaki Furnace Co., Ltd. (72) Tatsuo Kawakami, 1576 Higashi-oki, Aki, Ako-shi, Hyogo No. 2 in Kawasaki Furnace Co., Ltd. (72) Inventor Tsutomu Yoshida No. 1576, Tohoku, Nakaho, Ako City, Hyogo Prefecture No. 2 in No. 2 Kawasaki Furnace Co., Ltd. (72) Inventor Haruji Okuda Mizushima Kawasaki, Kurashiki, Okayama Prefecture 1 chome (no address) Kawasaki Steel Co., Ltd., Mizushima Steel Works (56) References JP-A-53-75207 (JP, A)
Claims (2)
40重量％、および粉末硫黄0.05〜1.5重量％を含んだ熱
間補修材。1. Basic aggregate 60-90% by weight, solid pitch 10-
A hot repair material containing 40% by weight and 0.05 to 1.5% by weight of powdered sulfur.
て液状フェノール樹脂、エチレングリコール等の多価ア
ルコール、灯油、重油、アントラセン油、水のうちの少
なくとも１種を合計２〜10重量％添加した請求項１に記
載の熱間補修材。2. In addition to the above, a wetting agent is used, and as the wetting agent, at least one of liquid phenol resin, polyhydric alcohol such as ethylene glycol, kerosene, heavy oil, anthracene oil, and water is used in a total amount of 2 to 10 wt. %, The hot repair material according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1044725A JP2549169B2 (en) | 1989-02-23 | 1989-02-23 | Hot repair material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1044725A JP2549169B2 (en) | 1989-02-23 | 1989-02-23 | Hot repair material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02225378A JPH02225378A (en) | 1990-09-07 |
| JP2549169B2 true JP2549169B2 (en) | 1996-10-30 |
Family
ID=12699417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1044725A Expired - Fee Related JP2549169B2 (en) | 1989-02-23 | 1989-02-23 | Hot repair material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2549169B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007302521A (en) * | 2006-05-12 | 2007-11-22 | Kurosaki Harima Corp | Hot casting repair material |
| JP5967767B2 (en) * | 2012-09-26 | 2016-08-10 | 黒崎播磨株式会社 | Baking repair material |
| CN105801136A (en) * | 2016-02-04 | 2016-07-27 | 北京利尔高温材料股份有限公司 | Converter repairing mass and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4184883A (en) * | 1976-12-17 | 1980-01-22 | Eltra Corporation | Pitch bonded refractory |
-
1989
- 1989-02-23 JP JP1044725A patent/JP2549169B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02225378A (en) | 1990-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7914599B2 (en) | Slag conditioner composition, process for manufacture and method of use in steel production | |
| AU2003228122B2 (en) | Coal briquettes for smelting reduction process, and method for manufacturing the same | |
| US20070266824A1 (en) | Using a slag conditioner to beneficiate bag house dust from a steel making furnace | |
| CN1050591C (en) | Fired microporous carbon-aluminium brick | |
| US2527829A (en) | Foundry additives | |
| JP2549169B2 (en) | Hot repair material | |
| US4545568A (en) | Unfired refractory structural member in the form of a plate for use as an expendable lining of metallurgical vessels | |
| GB2216117A (en) | Refractory compositions or cements | |
| US2576566A (en) | Agglomerated body and the method of preparing same | |
| US2626871A (en) | Chemically bonded carbon refractory | |
| JPH0118030B2 (en) | ||
| US3442670A (en) | Carbon composition and process | |
| JPH02267172A (en) | Hot repairing material and hot repairing method | |
| RU2055919C1 (en) | Method for briquetting metallurgical production wastes, for instance , steel scale | |
| US4436678A (en) | Method for hot repairing the inside of a furnace | |
| JPH0146473B2 (en) | ||
| US3215546A (en) | Refractory practices | |
| HUT73055A (en) | Process for producing slag-forming briquettes to be used in smelting furnaces, and its using in cupolas furnaces | |
| JP2517192B2 (en) | Resin-bonded carbon-containing amorphous refractory | |
| RU2135428C1 (en) | Refractory mixture for rammed linings of structural elements and equipment of blast furnace cast houses | |
| JPS5930776A (en) | Vibration formed material for blast furnace tap hole channel thermal repairment | |
| JP2008100886A (en) | Mud material | |
| JPH08143372A (en) | Castable refractory for hot repairing and its production | |
| JPH0135885B2 (en) | ||
| JP3151202B2 (en) | Refractory materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |