JP2003268426A - Lining for tapping flume of blast furnace, and forming method therefor - Google Patents
Lining for tapping flume of blast furnace, and forming method thereforInfo
- Publication number
- JP2003268426A JP2003268426A JP2002068246A JP2002068246A JP2003268426A JP 2003268426 A JP2003268426 A JP 2003268426A JP 2002068246 A JP2002068246 A JP 2002068246A JP 2002068246 A JP2002068246 A JP 2002068246A JP 2003268426 A JP2003268426 A JP 2003268426A
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- Prior art keywords
- silicon carbide
- lining
- alumina
- refractory
- blast furnace
- Prior art date
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- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は局部溶損が抑制され
た高炉出銑樋用内張り及びその形成方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining for a blast furnace tappipe in which local melting damage is suppressed and a method for forming the lining.
【０００２】[0002]
【従来の技術】高炉出銑樋は、高炉から出銑された溶銑
とスラグ（高炉スラグ）を分離する役割を有する。溶銑
とスラグは比重が異なるので、例えば図３に示すように
高炉出銑樋の上部をスラグ１が流れ、下部を溶銑２が流
れる。なお３は内張りを示し、４は裏張り煉瓦を示し、
５は鉄皮を示す。2. Description of the Related Art A blast furnace tappipe has a role of separating molten iron tapped from a blast furnace and slag (blast furnace slag). Since the hot metal and the slag have different specific gravities, for example, as shown in FIG. 3, the slag 1 flows in the upper part of the blast furnace tap pipe and the hot metal 2 flows in the lower part. 3 is the lining, 4 is the backing brick,
5 shows an iron skin.
【０００３】そのため大気とスラグの界面が接触する内
張りのスラグライン６では、スラグ溶損に加え熱スポー
ルによる剥離等も起こり、スラグのみと接触している他
の内張り部分と比べて溶損速度が著しく速い。またスラ
グと溶銑の界面が接触する内張りのメタルライン７で
も、溶銑と内張材との反応に加え、スラグと溶銑と内張
材との反応（マランゴニー効果によりスラグと溶銑から
生成する反応性に富んだFeOと内張材とが反応して、低
融点化合物を生成する）により、溶銑のみと接触してい
る他の内張り部分と比べて溶損速度が著しく速い。Therefore, in the lining slag line 6 where the interface between the atmosphere and the slag is in contact, in addition to slag melting loss, delamination due to heat spalls occurs, and the melting loss rate is higher than that of other lining parts that are in contact with only the slag. Remarkably fast. Even in the lining metal line 7 in which the interface between the slag and the hot metal comes into contact, in addition to the reaction between the hot metal and the lining material, the reaction between the slag, the hot metal and the lining material (the reactivity generated from the slag and the hot metal due to the Marangoni effect) Due to the reaction between rich FeO and the lining material to form a low melting point compound, the melting rate is significantly faster than other lining parts that are in contact only with the hot metal.
【０００４】スラグライン及びメタルラインで発生する
局部溶損は、高炉出銑樋の内張りの側壁部のみならず内
張り全体の寿命をも決定する。そこで、このような局部
溶損を抑えることにより内張り全体の溶損速度を低下さ
せ、もって内張りの長寿命化を図る技術が提案されてい
る。The local erosion damage generated in the slag line and the metal line determines not only the side wall portion of the lining of the blast furnace tap pipe but also the life of the entire lining. Therefore, a technique has been proposed in which the local melting loss is suppressed to reduce the melting loss rate of the entire lining, thereby extending the life of the lining.
【０００５】例えば実開昭55-116994号には、局部溶損
の激しい部分を中心に、側壁用内張り耐火物の全面或い
は一部分を可撓性耐火断熱ボードで被覆することによ
り、内張り耐火物を保護し、溶損量を大幅に減少させる
方法が開示されている。また特開平8-246013号には、メ
タルラインが形成される内張りの部位を周囲よりも傾斜
が緩やかなスロープとすることにより、マランゴニー効
果により形成されるスラグフィルムの運動を抑制し、も
ってメタルラインでの局部溶損を抑制する方法が開示さ
れている。For example, in Japanese Utility Model Laid-Open No. 55-116994, a lining refractory is covered with a flexible refractory insulation board by covering the entire or a part of the lining refractory for the side wall with a focus on a portion where local melting damage is severe. A method of protecting and significantly reducing the amount of erosion is disclosed. Further, in JP-A-8-246013, by suppressing the movement of the slag film formed by the Marangoni effect by making the lining portion where the metal line is formed a slope with a gentler inclination than the surroundings, the metal line There is disclosed a method for suppressing local melting loss in the above.
【０００６】これらの先行技術はいずれも、局部溶損を
抑え内張り全体の溶損速度の均一化を図る方法である。
しかし実開昭55-116994号に開示の方法では、一旦築造
された施工体の表面に耐火モルタル等の接着剤で耐火ボ
ードを接着し、さらにセラミック製の釘等で固定するの
で、工程が繁雑である。また特開平8-246013号に開示の
方法には、スロープの傾斜角度を75°以下に抑えるとと
もに、メタルラインがスロープに形成されるように操業
しなければならないといった制約がある。Each of these prior arts is a method for suppressing local melting loss and making the melting loss rate of the entire lining uniform.
However, in the method disclosed in Japanese Utility Model Publication No. 55-116994, since the fireproof board is adhered to the surface of the construction body once constructed with an adhesive such as fireproof mortar, and further fixed with ceramic nails, the process is complicated. Is. Further, the method disclosed in Japanese Patent Application Laid-Open No. 8-246013 has restrictions that the slope angle of the slope must be suppressed to 75 ° or less and that the metal line must be operated so as to be formed on the slope.
【０００７】そのため、内張りをスラグライン部とメタ
ルライン部とに上下２分割するとともに、スラグライン
部では耐スラグ性及び耐熱スポール性に優れた耐火物を
流し込み施工し、メタルライン部では耐溶銑性及び耐Fe
O性に優れた耐火物を流し込み施工するゾーンライニン
グ施工法が提案されている。ゾーンライニング施工法に
よれば、組成の異なる２種類の耐火物を上下に流し込む
だけなので施工は容易であり、さらにそれぞれの局部溶
損の要因に対して最適な組成の流し込み耐火物を選択で
きるので、溶損メカニズムの異なる局部溶損に対応しや
すい。Therefore, the lining is divided into two parts, a slag line part and a metal line part, and a refractory material having excellent slag resistance and heat-resistant spall resistance is poured into the slag line part, and hot metal resistance is applied to the metal line part. And Fe resistance
A zone lining construction method has been proposed in which refractory with excellent O-pours is poured and constructed. According to the zone lining construction method, since only two types of refractory with different compositions are poured vertically, the construction is easy and the cast refractory with the optimum composition can be selected for each factor of local melting loss. It is easy to deal with local meltdown with different meltdown mechanism.
【０００８】耐スラグ性及び耐熱スポール性が必要なス
ラグライン部用耐火物には、炭化珪素を多量に含有する
アルミナ−炭化珪素−炭素質流し込み耐火物（特公平6-
8223号及び特開2000-203953号参照）を使用するのが一
般的である。また耐溶銑性及び耐FeO性が必要なメタル
ライン部用耐火物には、FeOとの反応性が小さいアルミ
ナ・マグネシア系スピネル（以下特に断らない限り「ス
ピネル」と称する）を主材としたアルミナ−スピネル−
炭化珪素−炭素質の流し込み耐火物（特許2556416号及
び特開2000-351674号参照）を使用するのが一般的であ
る。A refractory for a slag line, which requires slag resistance and heat resistant spall resistance, is an alumina-silicon carbide-carbonaceous casting refractory containing a large amount of silicon carbide (Japanese Patent Publication No.
8223 and JP-A-2000-203953) are generally used. Alumina and magnesia-based spinel (hereinafter referred to as "spinel" unless otherwise specified), which has low reactivity with FeO, is used as the main material for refractories for metal line parts that require hot metal resistance and FeO resistance. -Spinel-
It is common to use a silicon carbide-carbonaceous cast refractory material (see Japanese Patent No. 2556416 and Japanese Patent Laid-Open No. 2000-351674).
【０００９】[0009]
【発明が解決しようとする課題】しかしスラグライン部
とメタルライン部との境界部付近ではメタルライン部用
耐火物の溶損速度が上昇し、スラグライン部用耐火物中
の炭化珪素の含有量が増える程この傾向は顕著となる。
このような境界部付近におけるメタルライン部用耐火物
の溶損の原因は、以下のように考えられる。However, the melting rate of the refractory for the metal line portion increases near the boundary between the slag line portion and the metal line portion, and the content of silicon carbide in the refractory material for the slag line portion increases. This tendency becomes more pronounced as the number increases.
The cause of such melting damage of the refractory for the metal line portion in the vicinity of the boundary portion is considered as follows.
【００１０】図４に示すように、スラグライン部用耐火
物とメタルライン部用耐火物によるゾーンライニング施
工法では、スラグライン部８とメタルライン部９との境
界部10がスラグライン６とメタルライン７のほぼ中間に
位置するように施工されており、境界部10付近のメタル
ライン部９はスラグ１と接しているためスラグ溶損され
やすい。さらにメタルライン部用耐火物のスピネル中に
含まれるマグネシアが、境界部10付近のスラグライン部
用耐火物中の炭化珪素を酸化することによりSiO2が生成
し、SiO2がメタルライン部用耐火物中のスピネルとさら
に反応することにより低融点化合物が生成するため、境
界部10付近の溶損量が著しく大きくなる。As shown in FIG. 4, in the zone lining construction method using the refractory material for the slag line portion and the refractory material for the metal line portion, the boundary portion 10 between the slag line portion 8 and the metal line portion 9 has the slag line 6 and the metal. Since the metal line portion 9 near the boundary 10 is in contact with the slag 1, the metal line portion 9 near the boundary 10 is easily damaged by slag melting. Further magnesia contained in the spinel of the metal line part refractories is, SiO 2 is produced by oxidizing the silicon carbide slag line portion refractories in the vicinity of the boundary portion 10, SiO 2 refractory for metal line part The low melting point compound is generated by further reaction with the spinel in the substance, so that the melting loss amount in the vicinity of the boundary portion 10 becomes significantly large.
【００１１】また境界部10ではスラグライン部用耐火物
とメタルライン部用耐火物の接着力が幾分弱く、他の部
位と比べてスラグ１が内張り３の裏側まで回り込みやす
い。そのため境界部10での局部溶損は、スラグライン６
やメタルライン７での局部溶損と比べて漏銑事故等の大
事故につながりやすい。At the boundary portion 10, the adhesive strength of the refractory material for the slag line portion and the refractory material for the metal line portion is somewhat weak, so that the slag 1 easily wraps around to the back side of the lining 3 as compared with other portions. Therefore, the local melting loss at the boundary 10 is caused by the slag line 6
Compared with local melting damage on the metal line 7 or metal line 7, it is more likely to lead to a major accident such as a leaking iron accident.
【００１２】従って本発明の目的は、スラグライン部及
びメタルライン部での局部溶損に対して十分な耐用性を
有するとともに、スラグライン部とメタルライン部との
境界部での局部溶損も抑制できる高炉出銑樋用内張り及
びその形成方法を提供することである。Therefore, an object of the present invention is to have sufficient durability against local melting damage at the slag line portion and the metal line portion, and also to have local melting damage at the boundary portion between the slag line portion and the metal line portion. It is an object to provide a lining for a blast furnace tappipe that can be suppressed and a method for forming the lining.
【００１３】[0013]
【課題を解決するための手段】上記目的に鑑み鋭意研究
の結果、本発明者らは、ゾーンライニング施工された高
炉出銑樋用内張りにおいて、炭化珪素を主材とする耐火
物からなるスラグライン部とスピネルを主材とする耐火
物からなるメタルライン部との間に中間部を設け、前記
中間部を耐スラグ性を有するとともにスピネルに対する
反応性が低い耐火物で形成することにより、スラグライ
ン部及びメタルライン部での局部溶損に対して十分な耐
用性を有するとともに、スラグライン部とメタルライン
部との境界部での局部溶損も抑制できることを見出し、
本発明に想到した。As a result of intensive studies in view of the above-mentioned objects, the present inventors have found that in a lining for blast furnace tappipe which is zone-lined, a slag line made of a refractory material containing silicon carbide as a main material. Section and a metal line section consisting of a refractory material mainly composed of spinel, an intermediate section is provided, and the intermediate section is formed of a refractory material having slag resistance and low reactivity to spinel, thereby forming a slag line. It has sufficient durability against local erosion damage in the metal part and the metal line part, and found that local erosion damage at the boundary part between the slag line part and the metal line part can also be suppressed,
The present invention was conceived.
【００１４】すなわち、本発明の高炉出銑樋用内張りは
上から順にスラグライン部と、中間部と、メタルライン
部とを有し、前記スラグライン部は炭化珪素含有量が75
質量％以上のアルミナ−炭化珪素−炭素質不定形耐火物
からなり、前記中間部は炭化珪素含有量が10〜70質量％
のアルミナ−炭化珪素−炭素質不定形耐火物からなり、
前記メタルライン部はアルミナ・マグネシア系スピネル
含有量が10〜70質量％のアルミナ−スピネル−炭化珪素
−炭素質不定形耐火物からなることを特徴とする。That is, the blast furnace tapping lining of the present invention has a slag line portion, an intermediate portion, and a metal line portion in order from the top, and the slag line portion has a silicon carbide content of 75.
Alumina-silicon carbide-carbonaceous amorphous refractory of more than mass%, the intermediate portion has a silicon carbide content of 10 to 70 mass%
Of alumina-silicon carbide-carbonaceous amorphous refractory,
The metal line part is made of alumina-spinel-silicon carbide-carbonaceous amorphous refractory having an alumina-magnesia spinel content of 10 to 70% by mass.
【００１５】本発明の高炉出銑樋用内張りの形成方法
は、下から順に、アルミナ・マグネシア系スピネル含有
量が10〜70質量％のアルミナ−スピネル−炭化珪素−炭
素質不定形耐火物の混練物を施工してメタルライン部を
形成し、炭化珪素含有量が10〜70質量％のアルミナ−炭
化珪素−炭素質不定形耐火物の混練物を施工して中間部
を形成し、次いで炭化珪素含有量が75質量％以上のアル
ミナ−炭化珪素−炭素質不定形耐火物の混練物を施工し
てスラグライン部を形成することを特徴とする。The method for forming a lining for a blast furnace tappipe according to the present invention comprises kneading an alumina-spinel-silicon carbide-carbonaceous amorphous refractory having an alumina-magnesia spinel content of 10 to 70% by mass in order from the bottom. Is applied to form a metal line portion, and a kneaded material of alumina-silicon carbide-carbonaceous amorphous refractory having a silicon carbide content of 10 to 70 mass% is applied to form an intermediate portion, and then silicon carbide. A slag line portion is formed by applying a kneaded material of alumina-silicon carbide-carbonaceous amorphous refractory having a content of 75% by mass or more.
【００１６】本発明の高炉出銑樋用内張りの形成方法に
おいて、前記スラグライン部、前記中間部及び前記メタ
ルライン部の施工を、各不定形耐火物の混練物を型枠に
流し込み、養生及び乾燥することにより行うのが好まし
い。In the method for forming a lining for a blast furnace tappipe according to the present invention, the slag line part, the intermediate part and the metal line part are constructed by pouring a kneaded material of each amorphous refractory into a mold, curing and curing. It is preferably carried out by drying.
【００１７】また本発明の高炉出銑樋用内張りの形成方
法において、前記スラグライン部、前記中間部及び前記
メタルライン部の施工を、各不定形耐火物の混練物を圧
送ポンプで吹付けノズルまで圧送し、出銑樋に吹付けノ
ズルで圧搾空気及び急結剤とともに吹付け、養生及び乾
燥することにより行うのが好ましい。In the method of forming a lining for a blast furnace tappipe according to the present invention, the slag line portion, the intermediate portion and the metal line portion are constructed by spraying a kneaded product of each refractory refractory with a pressure pump. It is preferable to carry out by pressure feeding to, and spraying on the tap pipe with compressed air and a quick-setting agent with a spray nozzle, curing and drying.
【００１８】[0018]
【発明の実施の形態】本発明の高炉出銑樋用内張りは、
図１に示すように上から順にスラグライン部８、中間部
11及びメタルライン部９の三層からなる。スラグライン
部８、中間部11及びメタルライン部９の厚み（高さ方向
の厚み）は、高炉出銑樋の使用時に各溶損メカニズムに
対して最適な組成の不定形耐火物層が位置しているよう
に、設定するのが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The lining for a blast furnace tappipe according to the present invention is
As shown in FIG. 1, the slag line portion 8 and the middle portion are arranged in this order from the top.
It is composed of three layers, 11 and a metal line part 9. The thickness of the slag line part 8, the middle part 11 and the metal line part 9 (thickness in the height direction) is such that when the blast furnace tappipe is used, the amorphous refractory layer having the optimum composition for each melting mechanism is located. As described above, it is preferable to set.
【００１９】[A] 不定形耐火物
スラグライン部８には、耐スラグ性及び耐熱スポール性
に優れた炭化珪素を主材とするアルミナ−炭化珪素−炭
素質不定形耐火物を使用し、中間部11には耐スラグ性を
有するとともにスピネルに対する反応性が低くなるよう
に炭化珪素含有量を調整したアルミナ−炭化珪素−炭素
質不定形耐火物を使用し、メタルライン部９には耐溶銑
性及び耐FeO性を有するスピネルを主材としたアルミナ
−スピネル−炭化珪素−炭素質不定形耐火物を使用す
る。各不定形耐火物は、上記主成分の他に耐火性骨材、
耐火性超微粉及びアルミナセメント等の耐火材と、分散
剤等の添加剤を含有する。[A] Amorphous refractory slag line portion 8 uses an alumina-silicon carbide-carbonaceous amorphous refractory containing silicon carbide as a main material, which is excellent in slag resistance and heat-resistant spall resistance. Alumina-silicon carbide-carbonaceous amorphous refractory material having a slag resistance and a silicon carbide content adjusted to have low reactivity with spinel is used for the portion 11, and the metal line portion 9 is resistant to the hot metal. Also, an alumina-spinel-silicon carbide-carbonaceous amorphous refractory containing spinel having FeO resistance as a main material is used. Each amorphous refractory is a refractory aggregate in addition to the above main components,
It contains refractory materials such as ultrafine refractory powder and alumina cement, and additives such as dispersants.
【００２０】まず各不定形耐火物の主成分について説明
し、次いでその他の耐火材及び添加剤について説明す
る。First, the main components of each amorphous refractory material will be described, and then other refractory materials and additives will be described.
【００２１】(1) スラグライン部用不定形耐火物
この不定形耐火物は、アルミナと炭化珪素と炭素とを主
成分とし、炭化珪素含有量は75質量％以上である。この
不定形耐火物における炭化珪素の含有量は（炭化珪素／
耐火組成物）×100質量％であり、この耐火組成物は主
成分の他に、その他の耐火性骨材及び耐火性超微粉並び
にアルミナセメントを含む。炭化珪素含有量を75質量％
以上とすることにより、耐スラグ性及び耐スポーリング
性に優れた不定形耐火物とすることができる。(1) Irregular refractory for slag line This irregular refractory contains alumina, silicon carbide and carbon as main components, and has a silicon carbide content of 75 mass% or more. The content of silicon carbide in this amorphous refractory is (silicon carbide /
(Refractory composition) × 100% by mass. This refractory composition contains, in addition to the main components, other refractory aggregates and refractory ultrafine powder, and alumina cement. 75% by mass of silicon carbide content
By the above, an amorphous refractory having excellent slag resistance and spalling resistance can be obtained.
【００２２】(イ) 炭化珪素
本発明に使用する炭化珪素は純度（SiC 含有量）が85％
以上、好ましくは90％以上のものである。炭化珪素の含
有量は、耐火組成物全体を100質量％として75質量％以
上であり、好ましくは80質量％以上である。炭化珪素の
含有量が75質量％未満では耐スポーリング性や耐スラグ
性の向上効果が十分でない。炭化珪素の粒径は10 mm以
下が好ましい。粒径が10 mm超になると、流し込み施工
を行う場合の流動性が悪化したり、形成されたスラグラ
イン部の緻密性が悪化したりする恐れがある。炭化珪素
の粒径の下限は限定的ではなく、10μm以下の超微粉状
であっても良い。また１〜10 mmの粒径の炭化珪素粒子
と１mm 以下の粒径の炭化珪素粉末とを混合して使用し
ても良い。(B) Silicon Carbide Silicon carbide used in the present invention has a purity (SiC content) of 85%.
Or more, preferably 90% or more. The content of silicon carbide is 75% by mass or more, preferably 80% by mass or more, based on 100% by mass of the entire refractory composition. When the content of silicon carbide is less than 75% by mass, the effect of improving spalling resistance and slag resistance is not sufficient. The particle size of silicon carbide is preferably 10 mm or less. If the particle size exceeds 10 mm, there is a possibility that the fluidity of the slag line portion formed may deteriorate or the flowability of the formed slag line portion may deteriorate. The lower limit of the particle size of silicon carbide is not limited, and may be ultrafine powder having a particle size of 10 μm or less. Further, silicon carbide particles having a particle diameter of 1 to 10 mm and silicon carbide powder having a particle diameter of 1 mm or less may be mixed and used.
【００２３】(ロ) アルミナ
アルミナとしては電融アルミナ、焼結アルミナ及び仮焼
アルミナを使用するのが好ましい。アルミナの含有量は
耐火組成物全体を100質量％として2.5 〜15質量％が好
ましい。アルミナの粒径は10 mm以下が好ましい。アル
ミナの粒径の下限は限定的ではなく、10μm以下の超微
粉状であっても良い。また１〜10 mmの粒径のアルミナ
粒子と１mm 以下の粒径のアルミナ粉末とを混合して使
用しても良い。(B) Alumina It is preferable to use fused alumina, sintered alumina, and calcined alumina as alumina. The content of alumina is preferably 2.5 to 15% by mass based on 100% by mass of the entire refractory composition. The particle size of alumina is preferably 10 mm or less. The lower limit of the particle size of alumina is not limited, and it may be in the form of ultrafine particles of 10 μm or less. Further, alumina particles having a particle diameter of 1 to 10 mm and alumina powder having a particle diameter of 1 mm or less may be mixed and used.
【００２４】(ハ) 炭素
炭素としてはカーボンブラック、ピッチ、黒鉛及びコー
クスを使用するのが好ましい。炭素の含有量は耐火組成
物全体を100質量％として0.5 〜５質量％が好ましい。
炭素の粒径は10μｍ以下が好ましく、１μｍ以下がより
好ましい。(C) Carbon It is preferable to use carbon black, pitch, graphite and coke as carbon. The carbon content is preferably 0.5 to 5% by mass based on 100% by mass of the entire refractory composition.
The particle size of carbon is preferably 10 μm or less, more preferably 1 μm or less.
【００２５】(2) 中間部用不定形耐火物
この不定形耐火物は、アルミナと炭化珪素と炭素とを主
成分とし、炭化珪素の含有量は10〜70質量％であり、好
ましくは30〜68質量％である。炭化珪素の含有量の算出
方法は、スラグライン部用不定形耐火物の場合と同じく
（炭化珪素／耐火組成物）×100質量％である。この耐
火組成物は主成分の他に、その他の耐火性骨材及び耐火
性超微粉並びにアルミナセメントを含む。炭化珪素の含
有量が10質量％未満だと耐スラグ性が低く、70質量％を
超えるとメタルライン部用耐火物中のスピネルと反応し
て低融点化合物を多量に生成させ、メタルライン部用耐
火物の溶損量が著しく増える。炭化珪素含有量を10〜70
質量％とすることにより、耐スラグ性とスピネルに対す
る低反応性とを両立させることができる。なお炭化珪素
の純度及び粒径についてはスラグライン部用不定形耐火
物と同じである。(2) Irregular refractory for intermediate part This irregular refractory contains alumina, silicon carbide and carbon as main components, and the content of silicon carbide is 10 to 70% by mass, preferably 30 to It is 68 mass%. The method for calculating the content of silicon carbide is (silicon carbide / refractory composition) × 100 mass% as in the case of the amorphous refractory for the slag line portion. In addition to the main component, this refractory composition contains other refractory aggregates and refractory ultrafine powder, and alumina cement. If the content of silicon carbide is less than 10% by mass, the slag resistance is low, and if it exceeds 70% by mass, it reacts with the spinel in the refractory for metal line parts to generate a large amount of low melting point compounds, for metal line parts. The melting loss of refractory material increases significantly. Silicon carbide content 10 ~ 70
By setting the content to be% by mass, both slag resistance and low reactivity with spinel can be achieved. The purity and particle size of silicon carbide are the same as those of the amorphous refractory for the slag line part.
【００２６】その他の主成分のうちアルミナの種類及び
粒径についてはスラグライン部用不定形耐火物と同様で
ある。但しアルミナの含有量は耐火組成物全体を100質
量％として15 〜35質量％が好ましい。またその他の主
成分のうち炭素の種類、粒径及び含有量についてはスラ
グライン部用不定形耐火物と同様である。主成分以外の
成分についてはスラグライン部用不定形耐火物と同様で
ある。Among the other main components, the type and particle size of alumina are the same as those of the amorphous refractory for the slag line. However, the content of alumina is preferably 15 to 35% by mass based on 100% by mass of the entire refractory composition. Among the other main components, the type, particle size and content of carbon are the same as those of the amorphous refractory for slag line. Components other than the main component are the same as those of the amorphous refractory for the slag line part.
【００２７】(3) メタルライン部用不定形耐火物
この不定形耐火物は、アルミナとアルミナ・マグネシア
系スピネルと炭化珪素と炭素とを主成分とし、アルミナ
・マグネシア系スピネル含有量は10〜70質量％であり、
好ましくは30〜60質量％である。この不定形耐火物にお
けるスピネルの含有量は（スピネル／耐火組成物）×10
0質量％である。この耐火組成物は主成分の他に、その
他の耐火性骨材及び耐火性超微粉並びにアルミナセメン
トを含む。(3) Irregular refractory for metal line This irregular refractory contains alumina, alumina-magnesia-based spinel, silicon carbide and carbon as main components, and the alumina-magnesia-based spinel content is 10 to 70. Mass%,
It is preferably 30 to 60% by mass. The content of spinel in this amorphous refractory is (spinel / refractory composition) x 10
It is 0% by mass. In addition to the main component, this refractory composition contains other refractory aggregates and refractory ultrafine powder, and alumina cement.
【００２８】スピネルとしては電融スピネル及び焼結ス
ピネルを使用するのが好ましい。スピネルの含有量が10
質量％未満では耐溶銑性及び耐FeO性が低下し、70質量
％を超えると耐熱スポール性が低下する。スピネル含有
量を10〜70質量％とすることにより、耐溶銑性及び耐Fe
O性に優れた不定形耐火物とすることができる。As the spinel, it is preferable to use electrofused spinel and sintered spinel. Spinel content 10
When the content is less than 70% by mass, the hot metal resistance and the FeO resistance decrease, and when the content exceeds 70% by mass, the heat spall resistance decreases. By setting the spinel content to 10 to 70 mass%, the hot metal resistance and Fe resistance
It can be an irregular refractory material with excellent O property.
【００２９】スピネルの粒径は10 mm以下が好ましい。
スピネルの粒径の下限は限定的ではなく、10μm以下の
超微粉状であっても良い。また１〜10 mmの粒径のスピ
ネル粒子と１mm 以下の粒径のスピネル粉末とを混合し
て使用しても良い。The particle size of the spinel is preferably 10 mm or less.
The lower limit of the particle size of the spinel is not limited, and may be ultrafine powder having a particle size of 10 μm or less. Further, spinel particles having a particle diameter of 1 to 10 mm and spinel powder having a particle diameter of 1 mm or less may be mixed and used.
【００３０】その他の主成分のうち炭化珪素及びアルミ
ナに関して、炭化珪素の純度及び粒径、並びにアルミナ
の種類及び粒径についてはスラグライン部用不定形耐火
物と同様である。但し炭化珪素の含有量は耐火組成物全
体を100質量％として10 〜20質量％が好ましく、アルミ
ナの含有量は耐火組成物全体を100質量％として15 〜25
質量％が好ましい。またその他の主成分のうち炭素の種
類、粒径及び含有量についてはスラグライン部用不定形
耐火物と同様である。主成分以外の成分についてはスラ
グライン部用不定形耐火物と同様である。Regarding silicon carbide and alumina among the other main components, the purity and particle size of silicon carbide, and the type and particle size of alumina are the same as those of the amorphous refractory for the slag line portion. However, the content of silicon carbide is preferably 10 to 20% by mass based on 100% by mass of the refractory composition, and the content of alumina is 15 to 25% based on 100% by mass of the entire refractory composition.
Mass% is preferred. Among the other main components, the type, particle size and content of carbon are the same as those of the amorphous refractory for slag line. Components other than the main component are the same as those of the amorphous refractory for the slag line part.
【００３１】(4) その他の耐火材
(イ) 主成分以外の耐火性骨材
主成分以外の耐火性骨材としてはムライト、シャモッ
ト、ジルコン、ジルコニア、珪石、ろう石等を挙げるこ
とができる。耐火性骨材の粒径は10 mm以下であるのが
好ましい。(4) Other refractory materials (a) Refractory aggregates other than the main components Examples of the refractory aggregates other than the main components include mullite, chamotte, zircon, zirconia, silica stone, and wax. The particle size of the refractory aggregate is preferably 10 mm or less.
【００３２】(ロ) 主成分以外の耐火性超微粉
主成分以外の耐火性超微粉としては、シリカ、チタニ
ア、ムライト、ジルコニア、粘土、珪石、ろう石等が挙
げられる。耐火性超微粉の粒径は10μｍ以下が好まし
く、１μｍ以下がより好ましい。(B) Refractory ultrafine powder other than the main component Examples of the fireproof ultrafine powder other than the main component include silica, titania, mullite, zirconia, clay, silica stone, and pyrophyllite. The particle size of the refractory ultrafine powder is preferably 10 μm or less, more preferably 1 μm or less.
【００３３】(ハ) アルミナセメント
必要に応じて添加するアルミナセメントとしては、JIS
の１種、２種及び３種クラスが適している。各不定形耐
火物において、アルミナセメントの含有量は耐火組成物
全体を100質量％として0.5〜８質量％が好ましく、１〜
６質量％がより好ましい。0.5 質量％未満では強度発現
が十分ではなく、8 質量％を超えると耐蝕性が低下する
恐れがある。(C) Alumina cement JIS Alumina cement added as required is JIS
1, 2 and 3 classes of are suitable. In each amorphous refractory, the content of alumina cement is preferably 0.5 to 8% by mass, based on 100% by mass of the entire refractory composition, 1 to
6 mass% is more preferable. If it is less than 0.5% by mass, the strength development is not sufficient, and if it exceeds 8% by mass, the corrosion resistance may decrease.
【００３４】(5) 添加剤
(イ) 分散剤
分散剤としては、ヘキサメタリン酸ソーダ、トリポリリ
ン酸ソーダ等の縮合リン酸塩、β−ナフタレンスルホン
酸塩ホルマリン縮合物、メラミンスルホン酸塩ホルマリ
ン縮合物、アミノスルホン酸及びその塩、リグニンスル
ホン酸及びその塩、ポリアクリル酸及びその塩、ポリカ
ルボン酸及びその塩、オキシカルボン酸及びその塩等が
好ましく、これらを１種又は２種以上配合して使用する
ことができる。分散剤の添加量は、不定形耐火物全体を
100質量％として0.01〜１質量％（外掛け）であるのが
好ましい。分散剤の添加量が0.01質量％未満では耐火組
成物に対する充分な分散効果が得られず、また１質量％
超では最適な分散状態とならない。(5) Additive (a) Dispersant As the dispersant, condensed phosphates such as sodium hexametaphosphate and sodium tripolyphosphate, β-naphthalenesulfonate formalin condensate, melaminesulfonate formalin condensate, Amino sulfonic acid and its salt, lignin sulfonic acid and its salt, polyacrylic acid and its salt, polycarboxylic acid and its salt, oxycarboxylic acid and its salt, etc. are preferable, and these are used by mixing 1 type (s) or 2 or more types. can do. The amount of dispersant added should be based on the entire amorphous refractory
It is preferably 0.01 to 1% by mass (outer weight) as 100% by mass. If the amount of the dispersant added is less than 0.01% by mass, a sufficient dispersion effect on the refractory composition cannot be obtained, and the amount is 1% by mass.
If it is super, it will not be in an optimal dispersion state.
【００３５】(ロ) その他の添加剤
その他の添加剤としては、可使時間及び硬化時間調整の
ための硼酸、リン酸、オキシカルボン酸、炭酸アルカリ
塩等の各種添加剤、靭性向上のための無機あるいは金属
などの繊維、乾燥爆裂防止のための金属アルミニウム粉
末、オキシカルボン酸塩あるいは有機繊維などを添加す
ることができる。さらに金属シリコン、フェロシリコン
等の粉末状焼結助材、炭化ホウ素等の酸化防止材も使用
できる。(B) Other additives As other additives, various additives such as boric acid, phosphoric acid, oxycarboxylic acid and alkali carbonate for adjusting pot life and curing time, and for improving toughness Fibers such as inorganic or metal, aluminum aluminum powder for preventing dry explosion, oxycarboxylic acid salts or organic fibers can be added. Further, powdery sintering aids such as metallic silicon and ferrosilicon, and antioxidants such as boron carbide can also be used.
【００３６】[B] 各部の厚み
図２は高炉出銑樋用内張りの中間部11及びメタルライン
部９の厚み（高さ方向の厚み）と、スラグライン６及び
メタルライン７の高さ等との関係を示す。なお12は排滓
口を示し、13はダンパーを示す。矢印の方向に進行する
スラグ１はダンパー13により進行を妨げられて、排滓口
12より排出され、熔銑２のみ立ち上り部14を進行する。[B] Thickness of Each Part FIG. 2 shows the thickness (thickness in the height direction) of the intermediate part 11 and the metal line part 9 of the lining for blast furnace tappipe, the height of the slag line 6 and the metal line 7, etc. Shows the relationship. In addition, 12 shows a slag outlet and 13 shows a damper. The slag 1 that advances in the direction of the arrow is blocked by the damper 13 and the slag outlet
It is discharged from 12, and only the hot metal 2 advances to the rising portion 14.
【００３７】メタルライン７での局部溶損は主として樋
先の立ち上り部14とほぼ同じ高さ（ライン17の高さ）で
起こるので、図２に示すように、メタルライン部９の高
さ（メタルライン部９と中間部11との境界16）を立ち上
り部14の高さ（ライン17の高さ）より僅かな距離D1だけ
上にするのが好ましく、距離D1は50 mm以下であるのが
好ましい。距離D1が50 mm超であると、スラグライン部
８の下限（スラグライン部８と中間部11との境界15）の
位置は決まっているので、中間部11に十分な厚みを確保
できない。Since the local melting loss in the metal line 7 mainly occurs at almost the same height as the rising portion 14 of the gutter (the height of the line 17), as shown in FIG. 2, the height of the metal line portion 9 ( It is preferable that the boundary 16) between the metal line portion 9 and the intermediate portion 11 is located slightly above the height of the rising portion 14 (height of the line 17) by a distance D 1 , and the distance D 1 is 50 mm or less. Is preferred. If the distance D 1 is more than 50 mm, the lower limit of the slag line portion 8 (the boundary 15 between the slag line portion 8 and the intermediate portion 11) is fixed, so that the intermediate portion 11 cannot have a sufficient thickness.
【００３８】中間部11の厚みD2は樋の大きさによって異
なるが、一般的に30〜200 mmとするのが好ましい。中間
部11の厚みD2を30 mm未満にすると、スラグライン部８
とメタルライン部９が近くなり過ぎ、中間部11とメタル
ライン部９との境界16付近でメタルライン部９の溶損が
増加する恐れがある。一方厚みD2を200 mm超にすると、
スラグライン部８と中間部11との境界15がスラグライン
６に近くなり過ぎ、スラグライン６での局部溶損を抑制
することができなくなる。The thickness D 2 of the intermediate portion 11 varies depending on the size of the gutter, but it is generally preferable to set it to 30 to 200 mm. If the thickness D 2 of the intermediate portion 11 is less than 30 mm, the slag line portion 8
And the metal line portion 9 becomes too close to each other, and the melting loss of the metal line portion 9 may increase in the vicinity of the boundary 16 between the intermediate portion 11 and the metal line portion 9. On the other hand, if the thickness D 2 exceeds 200 mm,
The boundary 15 between the slag line portion 8 and the intermediate portion 11 becomes too close to the slag line 6, and local melting loss in the slag line 6 cannot be suppressed.
【００３９】[C] 施工方法
本発明の高炉出銑樋用内張りにおいては、下から順にメ
タルライン部９、中間部11及びスラグライン部８を施工
する。各部の施工方法には特に限定はなく、施工する樋
の性状に応じて、流し込み施工、湿式吹付け施工、ラミ
ング施工等の施工方法を実施することができる。但し施
工の容易性、得られる施工体の緻密さ等の面から流し込
み法及び湿式吹付け法が好ましい。湿式吹付け法の場
合、例えば特許2,831,976号に開示の方法を用いれば良
い。[C] Construction Method In the lining for blast furnace tap gutter of the present invention, the metal line portion 9, the intermediate portion 11 and the slag line portion 8 are constructed in order from the bottom. The construction method for each part is not particularly limited, and construction methods such as pouring construction, wet spraying construction, and ramming construction can be carried out depending on the properties of the gutter to be constructed. However, the pouring method and the wet spraying method are preferable from the viewpoints of ease of construction and the denseness of the obtained construction body. In the case of the wet spraying method, for example, the method disclosed in Japanese Patent No. 2,831,976 may be used.
【００４０】[0040]
【実施例】本発明を以下の実施例により更に詳細に説明
するが、本発明はこれらの例に限定されるものではな
い。EXAMPLES The present invention will be explained in more detail by the following examples, but the present invention is not limited to these examples.
【００４１】実施例１
敷部からの高さが1,000 mmの高炉出銑樋に対して、表１
に示す不定形耐火物(I)〜(III)を用いて、流し込み施工
方法により内張りを形成した。表１に示す各不定形耐火
物(I)〜(III)に表２に示す量の混練水を添加し、ボルテ
ックスミキサーで３分間混練した。得られた各不定形耐
火物 (III)、(II)及び(I)の混練物を、樋に設置した型
枠内に下から順に流し込み、24時間養生後脱枠した。各
部の厚みは表２に示す通りであった。 Example 1 For a blast furnace tappipe with a height from the floor of 1,000 mm, Table 1
The refractory materials (I) to (III) shown in Fig. 3 were used to form an inner lining by a casting method. The amounts of kneading water shown in Table 2 were added to each of the amorphous refractories (I) to (III) shown in Table 1, and the mixture was kneaded with a vortex mixer for 3 minutes. The kneaded product of each of the amorphous refractories (III), (II) and (I) thus obtained was poured from the bottom into a mold installed in a gutter in order from the bottom, and after curing for 24 hours, it was deframed. The thickness of each part was as shown in Table 2.
【００４２】実施例２
実施例１と同じ高炉出銑樋に対して、表１に示す不定形
耐火物(I)〜(III)を用いて、湿式吹付け施工方法により
内張りを形成した。表１に示す不定形耐火物(I)〜(III)
に表２に示す量の混練水を添加し、ミキサーで混練し
た。得られた各不定形耐火物(III)、(II)及び(I)の混練
物を圧送ポンプで吹付けノズルまで圧送し、吹付けノズ
ルで圧搾空気及び水ガラス水溶液（急結剤、添加量：0.
6質量％（外掛け）、濃度：40質量％）を混入し、高炉
出銑樋の内面に下から順に吹付け、24時間養生した。各
部の厚みは表２に示す通りであった。 Example 2 The same blast furnace tappipe as in Example 1 was coated with the amorphous refractories (I) to (III) shown in Table 1 by a wet spraying method to form an lining. Irregular refractories (I) to (III) shown in Table 1
The amount of kneading water shown in Table 2 was added to and kneaded with a mixer. The kneaded product of each of the amorphous refractories (III), (II) and (I) thus obtained is pressure-fed by a pressure pump to a blowing nozzle, and compressed air and a water glass aqueous solution (quick binder, addition amount) are blown by the blowing nozzle. : 0.
6% by mass (outside), concentration: 40% by mass) were mixed and sprayed onto the inner surface of the blast furnace tap pipe in order from the bottom and cured for 24 hours. The thickness of each part was as shown in Table 2.
【００４３】比較例１
実施例１と同じ高炉出銑樋に対して、表１に示す不定形
耐火物(I)及び(III)を用いて、流し込み施工方法により
内張りを形成した。表１に示す不定形耐火物(I)及び(II
I)に表２に示す量の混練水を添加し、ミキサーで混練し
た。得られた各不定形耐火物(III)、(I)の混練物を樋に
設置した型枠内に下から順に流し込み、24時間養生後脱
枠した。各部の厚みは表２に示す通りであった。[0043] for the same blast tapping trough and Comparative Example 1 Example 1, using castable refractory shown in Table 1 (I) and (III), to form a lining by casting construction methods. Irregular refractories (I) and (II shown in Table 1
The amount of kneading water shown in Table 2 was added to I) and kneading was performed with a mixer. The kneaded product of each of the amorphous refractories (III) and (I) thus obtained was poured from the bottom into a mold installed in a gutter in order from the bottom, and after curing for 24 hours, the frame was removed. The thickness of each part was as shown in Table 2.
【００４４】[0044]
【表１】 [Table 1]
【００４５】[0045]
【表２】 [Table 2]
【００４６】実施例１，２及び比較例１で得られた各出
銑樋に対して、以下の測定を行った。
(1) 溶損速度：各出銑樋で60,000 トンの通銑を行い、
それぞれ樋の敷部から400mmの位置A、敷部から500 mmの
位置B、及び敷部から700 mmの位置Cで溶損厚を計測し、
溶損速度（通銑量1,000 t当りの溶損厚）を求めた。結
果を表3に示す。
(2) 最大通銑量：各出銑樋の内張りにおいて、いずれか
の溶損部位で残厚が100mmとなった時の通銑量を最大通
銑量とした。The following measurements were carried out on each of the tapping gutters obtained in Examples 1 and 2 and Comparative Example 1. (1) Melting rate: 60,000 tons of iron was passed through each tap gutter,
Measure the erosion thickness at position A 400 mm from the floor of the gutter, position B 500 mm from the floor, and position C 700 mm from the floor,
The erosion rate (the erosion thickness per 1,000 ton of iron penetration) was determined. The results are shown in Table 3. (2) Maximum amount of hot metal: The maximum amount of hot metal when the residual thickness was 100 mm at any of the erosion sites on the lining of each tap gutter.
【００４７】[0047]
【表３】 [Table 3]
【００４８】表３に示すように、実施例１及び２の三層
構造の内張りでは、位置A〜Cにおける溶損速度が小さ
く、最大通銑量も大きかった。従って実施例１及び２の
内張りでは、ほぼスラグライン６に相当する位置C及び
メタルライン７に相当する位置Aのみならず、ほぼメタ
ルライン部９と中間部11との境界16に相当する位置Bで
も局部溶損が少なく、優れた耐用性を有することが分か
った。As shown in Table 3, in the linings of the three-layer structure of Examples 1 and 2, the melt loss rate at the positions A to C was small, and the maximum amount of hot metal was large. Therefore, in the linings of Examples 1 and 2, not only the position C substantially corresponding to the slag line 6 and the position A corresponding to the metal line 7, but also the position B substantially corresponding to the boundary 16 between the metal line portion 9 and the intermediate portion 11. However, it was found that the local melting loss was small and the durability was excellent.
【００４９】これに対し、従来の二層構造を有する比較
例１の内張りでは、ほぼメタルライン７に相当する位置
A及びほぼスラグライン６に相当する位置Cにおける溶損
速度は小さいものの、ほぼスラグライン部８とメタルラ
イン部９との境界に相当する位置Bでの溶損速度が大き
く、実施例１及び２に比べて最大通銑量が著しく劣って
いた。On the other hand, in the lining of Comparative Example 1 having the conventional two-layer structure, the position substantially corresponding to the metal line 7 is provided.
Although the melt loss rate at A and the position C substantially corresponding to the slag line 6 is small, the melt loss rate at the position B substantially corresponding to the boundary between the slag line portion 8 and the metal line portion 9 is large, and the first and second embodiments The maximum penetration amount was significantly inferior to that of
【００５０】[0050]
【発明の効果】以上詳述したように、高炉出銑樋用内張
りを、耐スラグ性及び耐熱スポール性に優れた炭化珪素
を主材とするアルミナ−炭化珪素−炭素質不定形耐火物
からなるスラグライン部、耐スラグ性を有するとともに
スピネルに対する反応性が低くなるように炭化珪素含有
量を調整したアルミナ−炭化珪素−炭素質不定形耐火物
からなる中間部、及び耐溶銑性及び耐FeO性を有するス
ピネルを主材としたアルミナ−スピネル−炭化珪素−炭
素質不定形耐火物からなるメタルライン部の三層構造と
することによって、スラグライン部とメタルライン部と
の境界部での局部溶損を大幅に低下することができる。
その結果、樋材を高寿命化できるとともに漏銑による不
測の事故を減少させることもできる。As described above in detail, the lining for the blast furnace tap gutter is made of alumina-silicon carbide-carbonaceous amorphous refractory containing silicon carbide as the main material, which is excellent in slag resistance and heat-resistant spall resistance. Slag line part, middle part consisting of alumina-silicon carbide-carbonaceous amorphous refractory with adjusted slag resistance and silicon carbide content so as to have low reactivity to spinel, and hot metal resistance and FeO resistance By using a three-layer structure of a metal line part consisting of alumina-spinel-silicon carbide-carbonaceous amorphous refractory having spinel as the main material, local melting at the boundary between the slag line part and the metal line part is achieved. The loss can be significantly reduced.
As a result, it is possible to extend the life of the gutter and reduce accidents due to leaked iron.
【図１】 本発明の内張りを有する高炉出銑樋を示す幅
方向の横断面図及びその部分拡大図である。FIG. 1 is a cross-sectional view in the width direction showing a blast furnace tap pipe having an inner lining according to the present invention and a partially enlarged view thereof.
【図２】 図１のＡ−Ａ断面図であって、高炉出銑樋の
長さ方向の横断面を示す。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, showing a cross section in the length direction of the blast furnace tap pipe.
【図３】 従来の内張りを有する高炉出銑樋を示す幅方
向の横断面図及びその部分拡大図である。FIG. 3 is a cross-sectional view in a width direction showing a conventional blast furnace tap gutter having a lining and a partially enlarged view thereof.
【図４】 従来の二層内張り構造を有する高炉出銑樋を
示す部分拡大断面図である。FIG. 4 is a partially enlarged sectional view showing a conventional blast furnace tappipe having a two-layer lining structure.
１・・・スラグ ２・・・溶銑 ３・・・内張り ４・・・裏張煉瓦 ５・・・鉄皮 ６・・・スラグライン ７・・・メタルライン ８・・・スラグライン部 ９・・・メタルライン部 10・・・局部溶損 11・・・中間部 12・・・排滓口 13・・・ダンパー 14・・・樋先の立ち上り部 15・・・スラグライン部と中間部との境界 16・・・中間部とメタルライン部との境界 17・・・樋先の立ち上がり部の高さを示すライン 1 ... Slug 2 ... hot metal 3 lining 4 ... lining brick 5 ... iron skin 6 ... Slug line 7 ... Metal line 8: Slug line section 9 ... Metal line section 10 ... Local melting loss 11 ... Middle part 12 ... Slag outlet 13 ... Damper 14 ... Standing part of the gutter 15 ... Boundary between slag line and middle part 16 ... Boundary between middle part and metal line part 17: Line indicating the height of the rising part of the gutter
Claims (4)
メタルライン部を有する高炉出銑樋用内張りであって、
前記スラグライン部は炭化珪素含有量が75質量％以上の
アルミナ−炭化珪素−炭素質不定形耐火物からなり、前
記中間部は炭化珪素含有量が10〜70質量％のアルミナ−
炭化珪素−炭素質不定形耐火物からなり、前記メタルラ
イン部はアルミナ・マグネシア系スピネル含有量が10〜
70質量％のアルミナ−スピネル−炭化珪素−炭素質不定
形耐火物からなることを特徴とする高炉出銑樋用内張
り。1. A lining for a blast furnace tap gutter having a slag line portion, an intermediate portion and a metal line portion in order from the top,
The slag line portion has a silicon carbide content of 75 mass% or more of alumina-silicon carbide-carbonaceous amorphous refractory, the intermediate portion has a silicon carbide content of 10 to 70 mass% alumina-
Made of silicon carbide-carbonaceous amorphous refractory, the metal line portion has an alumina-magnesia-based spinel content of 10 to
A lining for a blast furnace tappipe characterized by comprising 70% by mass of alumina-spinel-silicon carbide-carbonaceous amorphous refractory material.
メタルライン部を有する高炉出銑樋用内張りを形成する
方法であって、下から順に、アルミナ・マグネシア系ス
ピネル含有量が10〜70質量％のアルミナ−スピネル−炭
化珪素−炭素質不定形耐火物の混練物を施工して前記メ
タルライン部を形成し、炭化珪素含有量が10〜70質量％
のアルミナ−炭化珪素−炭素質不定形耐火物の混練物を
施工して前記中間部を形成し、次いで炭化珪素含有量が
75質量％以上のアルミナ−炭化珪素−炭素質不定形耐火
物の混練物を施工して前記スラグライン部を形成するこ
とを特徴とする高炉出銑樋用内張りの形成方法。2. A method for forming a lining for blast furnace tapping gutter having a slag line part, an intermediate part and a metal line part in order from the top, wherein the content of alumina / magnesia spinel is 10 to 70 mass in order from the bottom. % Alumina-spinel-silicon carbide-carbonaceous amorphous refractory kneaded product is applied to form the metal line portion, and the silicon carbide content is 10 to 70% by mass.
Alumina-silicon carbide-carbonaceous amorphous refractory kneaded material is applied to form the intermediate portion, and then the silicon carbide content is
A method for forming a lining for a blast furnace tappipe, which comprises forming a slag line portion by applying a kneaded material of alumina-silicon carbide-carbonaceous amorphous refractory of 75% by mass or more.
形成方法において、前記スラグライン部、前記中間部及
び前記メタルライン部の施工を、各不定形耐火物の混練
物を型枠に流し込み、養生及び乾燥することにより行う
ことを特徴とする高炉出銑樋の内張り形成方法。3. The method for forming a lining for a blast furnace tap gutter according to claim 2, wherein the slag line portion, the intermediate portion, and the metal line portion are constructed by kneading a kneaded material of each irregular-shaped refractory. A method for forming a lining for a blast furnace tap pipe, which is performed by pouring into a furnace, curing and drying.
形成方法において、前記スラグライン部、前記中間部及
び前記メタルライン部の施工を、各不定形耐火物の混練
物を圧送ポンプで吹付けノズルまで圧送し、出銑樋に吹
付けノズルで圧搾空気及び急結剤とともに吹付け、養生
及び乾燥することにより行うことを特徴とする高炉出銑
樋の内張り形成方法。4. The method for forming a lining for a blast furnace tap gutter according to claim 2, wherein the slag line portion, the intermediate portion and the metal line portion are constructed by a pump for pumping a kneaded material of each irregular-shaped refractory. The method for forming a lining for a blast furnace tappipe according to claim 1, characterized in that the blast furnace tappipe is pressure-fed to the spray nozzle, and is sprayed on the tappipe with compressed air and a quick-setting agent, cured and dried.
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| JP2002068246A JP3721387B2 (en) | 2002-03-13 | 2002-03-13 | Blast furnace lining and method for forming the same |
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|---|---|---|---|
| JP2002068246A JP3721387B2 (en) | 2002-03-13 | 2002-03-13 | Blast furnace lining and method for forming the same |
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| Publication Number | Publication Date |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101619070B1 (en) | 2014-04-30 | 2016-05-10 | 한국산업기술대학교 산학협력단 | Refractory structure preventing corrosion in slag and bath boundary area and method for forming the structure |
| CN114058753A (en) * | 2020-12-18 | 2022-02-18 | 山东耐火材料集团有限公司 | Partitioning method for refractory material of main channel working layer of large blast furnace casting house |
| CN114685174A (en) * | 2022-04-27 | 2022-07-01 | 长兴明天炉料有限公司 | High-strength light tapping channel and preparation method thereof |
| CN114956839A (en) * | 2022-04-18 | 2022-08-30 | 南京联合荣大工程材料有限责任公司 | Baffle plate for skimmer and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921122B (en) * | 2010-08-17 | 2013-01-16 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
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2002
- 2002-03-13 JP JP2002068246A patent/JP3721387B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101619070B1 (en) | 2014-04-30 | 2016-05-10 | 한국산업기술대학교 산학협력단 | Refractory structure preventing corrosion in slag and bath boundary area and method for forming the structure |
| CN114058753A (en) * | 2020-12-18 | 2022-02-18 | 山东耐火材料集团有限公司 | Partitioning method for refractory material of main channel working layer of large blast furnace casting house |
| CN114956839A (en) * | 2022-04-18 | 2022-08-30 | 南京联合荣大工程材料有限责任公司 | Baffle plate for skimmer and preparation method thereof |
| CN114685174A (en) * | 2022-04-27 | 2022-07-01 | 长兴明天炉料有限公司 | High-strength light tapping channel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3721387B2 (en) | 2005-11-30 |
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