JPH0210844B2 - - Google Patents

Info

Publication number
JPH0210844B2
JPH0210844B2 JP60282789A JP28278985A JPH0210844B2 JP H0210844 B2 JPH0210844 B2 JP H0210844B2 JP 60282789 A JP60282789 A JP 60282789A JP 28278985 A JP28278985 A JP 28278985A JP H0210844 B2 JPH0210844 B2 JP H0210844B2
Authority
JP
Japan
Prior art keywords
weight
repair
trowel
pig iron
lining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP60282789A
Other languages
Japanese (ja)
Other versions
JPS62142711A (en
Inventor
Koji Kono
Hitoshi Nakamura
Hisahiro Ueno
Kanji Shiga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiko Refractories Co Ltd
Nippon Steel Corp
Original Assignee
Taiko Refractories Co Ltd
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taiko Refractories Co Ltd, Nippon Steel Corp filed Critical Taiko Refractories Co Ltd
Priority to JP60282789A priority Critical patent/JPS62142711A/en
Publication of JPS62142711A publication Critical patent/JPS62142711A/en
Publication of JPH0210844B2 publication Critical patent/JPH0210844B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/06Constructional features of mixers for pig-iron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明は溶銑運搬用混銑車に係わり、さらに詳
しくは混銑車内張り耐火物損耗部に効果的な補修
を施こして寿命延長を計るものである。 (従来の技術) 混銑車は、従来、搬送容器として使用され、そ
の寿命は安定していたが、近年、脱リンを主目的
とした溶銑予備処理が実施されるようになり反応
容器として用いられることが多くなつている。そ
のため、混銑車内張り耐火物は溶銑処理時の溶銑
撹拌や脱リン剤等のスラグ成分による侵蝕作用だ
けでなく、大型化に伴なつて受銑時の受銑による
衝撃作用や摩耗作用が増大するために損耗が大き
くなり、特にスラグライン部などは厳しい。 繰り返し使用によつて、混銑車内張り耐火物の
損耗は部位により異なつてくるため、損耗の厳し
い部分では新たな耐火物を張り替えたりするた
め、冷却、張り替などの作業が避けられず、しか
も耐火物コストが増大するなどの問題があり、寿
命延長及び耐火物コスト低減のために損耗部分の
補修が重要となつた。 従来は内張り煉瓦の損耗が大きくなれば、その
部分に煉瓦を損耗形状に合わせて補修する方法が
行なわれていたが、これでは補修コスト、作業時
間などの点で満点のいくものではなかつた。近
年、窯炉の補修法として、耐火物を損耗部に吹付
ける方法が行なわれるようになり作業時間の点で
は満足できるものであるが、この方法の場合、発
塵があり環境上好ましくない、耐火煉瓦、キヤス
タブル等に較べて構造体が多孔質となり十分な強
度が得られにくく、しかも均質な構造体が得られ
にくいという欠点がある。このような問題点を解
決する補修方法として、最近、耐火物(S55、9
月発行)32−513頁に示す如き振動鏝という施工
機器を用いる方法が開発されている。この方法は
鏝に振動をかけながら材料に揺変性を与えて鏝で
損耗部に耐火物を塗布するものである。現在、こ
の方法に用いられる材料として、アルミナセメン
トをバインダーにしたもの、耐火粘土をバインダ
ーにしたものがあるが、高温度域の熱間特性、作
業性、接着性などの点で満足のいくものではなか
つた。 (発明が解決しようとする問題点) 本願発明は上記したような問題点を解決するた
めになされたもので、高温域での熱間特性及び接
着性に優れた材料を振動鏝で簡単にかつ確実に補
修することにより、寿命延長及び炉材コストの低
減を計ろうとするものである。 (問題点を解決するための手段) その要旨とするところは、混銑車内張り耐火物
損耗部に、シリカ超微粉2〜5重量%及びSic微
粉10〜15重量%を配合させてなる不定形補修材を
振動鏝を用いて補修施工することを特徴とする混
銑車補修方法である。 以下本発明について詳しく説明する。 本願発明において使用する不定形補修材に必要
な具備特性としては、 鏝塗り材としての作業性 内張り残存煉瓦との接着性 耐蝕性 耐スポーリング性 容積安定性(低膨脹収縮率) などである。 骨材としては電融アルミナ、焼結アルミナ、ハ
イアルミナ、ボーキサイト、礬土頁岩、高アルミ
ナ原料のシリカ質などのシヤモツト原料等耐火物
業界において使用されるものであれば単独あるい
は組合わせて用いることができ、脱リン及び脱け
いスラグなどに対する耐蝕性、及び耐浸透性、容
積安定性の点からマトリツクス部にSiC微粉を使
用する。SiC微粉の添加量としては10〜15重量%
が好ましく、10重量%以下では耐蝕性、スラグの
耐浸透性などで効果が小さく、15重量%以上では
高価となり、効果は殆んど変わらず、多量の添加
はかえつて耐スポーリング性などに悪影響を及ぼ
す。 シリカ超微粉をバインダーとして使用すること
で、アルミナセメント、耐火粘土をバインダーと
するものに較べ高温域での熱間特性(耐スポーリ
ング性、容積安定性など)に優れている。また、
鏝による作業性として、鏝による材料の伸び及び
鏝からの離れが要求されるが、材料の伸びは主と
して流動性に関係し、鏝離れは材料の粘性に関係
するが、本補修材はシリカ超微粉を使用して、こ
のシリカ超微粉によるベアリング効果でこのよう
な鏝用の特性が得られるようにしている。施工時
に、内張り残存煉瓦の凹凸部にシリカ超微粉が効
果的に配置され接着面の表面積が大になり、煉瓦
面と密着されるため、優れた接着性を有する。シ
リカ超微粉としては中心粒径1μm以下好ましく
は0.1μm以下で球状のものでその添加量は2〜5
重量%が好ましく、2重量%以下ではその添加効
果が小さく、5重量%以上では耐スポーリング
性、作業性などに悪影響を及ぼして好ましくな
い。 このような材料を混銑車内張り煉瓦損耗部に配
設し、振動鏝にて振動をかけながら材料を鏝で所
要の厚みまで伸ばして塗布し、鏝をはなせば材料
の揺変性が止まり、煉瓦損傷部に効果的に補修を
行なうことができる。 (実施例) 以下に本発明に使用する補修材と従来品の補修
材の配合割合及びその物性を第1表に示す。 物性測定用の試片は全て4Gの振動を加えて成
形したものである。接着性テストはAl2O3−SiC
−C煉瓦の使用後煉瓦を40×40×80mmに切り出
し、40×40×160mmの型枠に切り出した煉瓦をセ
ツトし、残りの40×40×80mmに材料に振動をかけ
ながら鋳込んで接着させたものを試片とし、その
接着剪断強度を測定した。耐蝕性テストは誘導炉
侵蝕テスト方法で、侵蝕剤として銑鉄、合成スラ
グを用い、1550〜1570℃
(Industrial Application Field) The present invention relates to a pig iron mixer car for transporting hot metal, and more specifically, to effectively repair the worn parts of the refractory lining of the pig iron mixer car to extend its life. (Prior technology) Pig-mixing cars have traditionally been used as transport containers and had a stable lifespan, but in recent years, hot metal pretreatment has been carried out with the main purpose of dephosphorization, and they are now used as reaction vessels. Things are becoming more and more common. Therefore, the refractory lining inside a mixed pig iron car is not only subject to the corrosive effects of slag components such as hot metal agitation and dephosphorization agents during hot metal processing, but also increases the impact and abrasion effects caused by the receiving pig iron as the size increases. This increases wear and tear, especially on the slag line. Due to repeated use, the wear and tear of the refractory lining for mixed pig iron cars varies from part to part, so in areas with severe wear, new refractories must be installed, making cooling and relining work unavoidable. There were problems such as increased material costs, and it became important to repair worn parts in order to extend the lifespan and reduce the cost of refractories. Conventionally, if the lining bricks were severely worn, the method used was to repair the bricks in that area according to the shape of the wear, but this method was not completely satisfactory in terms of repair costs and work time. In recent years, a method for repairing furnaces has been to spray refractories onto the damaged parts, and although this method is satisfactory in terms of working time, it is environmentally unfavorable because it generates dust. Compared to refractory bricks, castables, etc., the structure is porous, making it difficult to obtain sufficient strength, and moreover, it is difficult to obtain a homogeneous structure. Recently, refractory materials (S55, 9
A method using a construction device called a vibrating trowel has been developed as shown on pages 32-513 (Published in May). This method applies thixotropy to the material while applying vibration to the trowel, and then applies refractory material to the worn parts with the trowel. Currently, there are materials used in this method that use alumina cement as a binder and fireclay as a binder, but none of them are satisfactory in terms of hot properties in a high temperature range, workability, adhesion, etc. It wasn't. (Problems to be Solved by the Invention) The present invention was made to solve the above-mentioned problems, and it is possible to easily and easily produce materials with excellent hot properties and adhesive properties in a high temperature range using a vibrating iron. The aim is to extend the service life and reduce the cost of furnace materials by reliably repairing them. (Means for solving the problem) The gist of the solution is to repair the damaged part of the refractory lining of a mixed pig iron car by adding 2 to 5% by weight of ultrafine silica powder and 10 to 15% by weight of Sic fine powder. This is a mixed pig iron car repair method characterized by repairing the material using a vibrating trowel. The present invention will be explained in detail below. The characteristics necessary for the amorphous repair material used in the present invention include: workability as a troweling material, adhesion to remaining lining bricks, corrosion resistance, spalling resistance, and volumetric stability (low expansion/contraction rate). Aggregates that are used in the refractory industry, such as fused alumina, sintered alumina, high alumina, bauxite, shale, and siliceous high alumina raw materials, can be used alone or in combination. SiC fine powder is used in the matrix part from the viewpoint of corrosion resistance against dephosphorization and desiliconization slag, permeation resistance, and volume stability. The amount of SiC fine powder added is 10 to 15% by weight.
is preferable; if it is less than 10% by weight, it will have little effect on corrosion resistance, slag penetration resistance, etc. If it is more than 15% by weight, it will be expensive, and the effect will hardly change, and if it is added in a large amount, it will adversely affect spalling resistance etc. Adversely affect. By using ultrafine silica powder as a binder, it has superior hot properties (spalling resistance, volume stability, etc.) at high temperatures compared to those using alumina cement or fireclay as a binder. Also,
Workability with a trowel requires elongation of the material with the trowel and separation from the trowel.Elongation of the material is mainly related to fluidity, and separation from the trowel is related to the viscosity of the material. By using fine powder, the bearing effect of this ultra-fine silica powder is used to obtain such characteristics for the trowel. During construction, ultrafine silica powder is effectively placed on the uneven parts of the remaining brick lining, increasing the surface area of the adhesive surface and adhering closely to the brick surface, resulting in excellent adhesion. Ultrafine silica powder is spherical with a center particle diameter of 1 μm or less, preferably 0.1 μm or less, and the amount added is 2 to 5
Weight% is preferable; if it is less than 2% by weight, the effect of addition is small, and if it is more than 5% by weight, it is not preferable because it adversely affects spalling resistance, workability, etc. Such a material is placed on the damaged part of the mixed iron car interior brick, and the material is stretched and applied to the required thickness with a vibrating iron while being vibrated with a vibrating iron.When the iron is removed, the thixotropy of the material stops and the brick is damaged. It is possible to effectively repair the area. (Example) Table 1 below shows the mixing ratio of the repair material used in the present invention and the conventional repair material and their physical properties. All specimens for measuring physical properties were formed by applying 4G vibration. Adhesion test is Al 2 O 3 −SiC
- After using the C bricks, cut the bricks to 40 x 40 x 80 mm, set the cut bricks in a 40 x 40 x 160 mm formwork, and pour into the remaining 40 x 40 x 80 mm while applying vibration to the material and adhere. The sample was used to measure the adhesive shear strength. The corrosion resistance test is an induction furnace corrosion test method, using pig iron and synthetic slag as corrosive agents, at 1550 to 1570℃.

【表】 で15時間保持した。 また第1図に示すようにA製鉄所350トン混銑
車10の内張り煉瓦損傷部に本補修材12を振動
鏝を用いて補修を行なつた結果、施工厚dが30mm
〜50mmで耐用寿命が50ch〜70chと良好な結果が
得られ、従来の内張り煉瓦補修法と比較して炉材
原単位が大幅に低減できた。なお図中12はウエ
アー煉瓦である。 (発明の効果) 前述した実施例から明らかなように本願は次の
ような優れた長所を有するものである。 内張り煉瓦の寿命延長が計れ、耐火物コスト
が低減できる。 熱間での特性(耐蝕性、耐スポール性など)
及び内張り煉瓦との接着性に優れる。 施工性が良好で、簡単にかつ確実に補修でき
る。
[Table] It was held for 15 hours. In addition, as shown in Fig. 1, as a result of repairing the damaged part of the lining brick of the 350-ton pig iron mixer car 10 at A steelworks using this repair material 12 using a vibrating trowel, the construction thickness d was 30 mm.
Good results were obtained with a service life of 50 to 70 channels at ~50 mm, and the unit furnace material consumption was significantly reduced compared to the conventional lining brick repair method. Note that 12 in the figure is a wear brick. (Effects of the Invention) As is clear from the embodiments described above, the present application has the following excellent advantages. The lifespan of the lining bricks can be extended, and the cost of refractories can be reduced. Hot properties (corrosion resistance, spall resistance, etc.)
and has excellent adhesion to lining bricks. It has good workability and can be easily and reliably repaired.

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

第1図に350T混銑車の断面図を示す。 11……ウエアー煉瓦、12……本発明に使用
の補修材。
Figure 1 shows a cross-sectional view of a 350T pig iron mixer. 11... Ware brick, 12... Repair material used in the present invention.

Claims (1)

【特許請求の範囲】[Claims] 1 混銑車内張り耐火物損耗部に、シリカ超微粉
2〜5重量%及びSiC微粉10〜15重量%を配合さ
せてなる不定形耐火物からなる補修材を振動鏝を
用いて補修施工することを特徴とする混銑車補修
方法。
1. Repairing the damaged part of the refractory lining of a mixed pig iron car using a vibrating trowel with a repair material made of a monolithic refractory made by blending 2 to 5% by weight of ultrafine silica powder and 10 to 15% by weight of fine SiC powder. Characteristic method for repairing mixed iron cars.
JP60282789A 1985-12-18 1985-12-18 Repairing method for torpedo ladle car Granted JPS62142711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60282789A JPS62142711A (en) 1985-12-18 1985-12-18 Repairing method for torpedo ladle car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60282789A JPS62142711A (en) 1985-12-18 1985-12-18 Repairing method for torpedo ladle car

Publications (2)

Publication Number Publication Date
JPS62142711A JPS62142711A (en) 1987-06-26
JPH0210844B2 true JPH0210844B2 (en) 1990-03-09

Family

ID=17657105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60282789A Granted JPS62142711A (en) 1985-12-18 1985-12-18 Repairing method for torpedo ladle car

Country Status (1)

Country Link
JP (1) JPS62142711A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0647503B2 (en) * 1990-03-29 1994-06-22 品川白煉瓦株式会社 Amorphous refractory for hot repair
CN102896307A (en) * 2012-11-02 2013-01-30 河南海格尔高温材料有限公司 Torpedo ladle opening sprue bushing repair method

Also Published As

Publication number Publication date
JPS62142711A (en) 1987-06-26

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