JPS6240307A - Method for protecting refractory in converter - Google Patents
Method for protecting refractory in converterInfo
- Publication number
- JPS6240307A JPS6240307A JP17682885A JP17682885A JPS6240307A JP S6240307 A JPS6240307 A JP S6240307A JP 17682885 A JP17682885 A JP 17682885A JP 17682885 A JP17682885 A JP 17682885A JP S6240307 A JPS6240307 A JP S6240307A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- slag
- refractory
- furnace
- kneading material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、転炉の炉内耐火物の保護詳しくは補修方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the protection of refractories in a converter furnace, and more particularly to a repair method.
第１図に上吹転炉の模式図を示す。これら上吹転炉１の
耐火物２は装入物の衝撃、炉体の傾動、吹錬中の溶鋼、
スラグの激しい攪拌、ダストの大量発生、急激な温度変
化などにより、その使用条件はほかの製鋼炉用耐大物に
比べかなり苛酷である。Figure 1 shows a schematic diagram of a top-blowing converter. The refractories 2 of the top-blown converter 1 are exposed to the impact of the charge, tilting of the furnace body, molten steel during blowing,
Due to the intense stirring of slag, the generation of large amounts of dust, and rapid temperature changes, the operating conditions are considerably harsher than for other large steelmaking furnaces.
一般に耐火物の損傷の機構として機械的摩耗、化学的浸
食、スポーリングがある。これら耐火物の品質例を第１
衣に示す。Common mechanisms of refractory failure include mechanical wear, chemical erosion, and spalling. The first example of the quality of these refractories is
Shown on clothing.
炉体寿命延長対策としては、炉体れんがの損傷機構は非
常に複雑で炉内位置により損耗速度は大巾に異なるため
各部に第１衣に示すような耐火物を用い最適ライニング
を行なう所謂ゾーンドライニングを強化することが行な
われている。As a measure to extend the life of the furnace body, the damage mechanism of the furnace bricks is very complex, and the rate of wear and tear varies greatly depending on the position within the furnace. Efforts are being made to strengthen drying.
これのみでは不十分なのでこれを補い各部の均一溶損を
ある程度保証するための技術として局部的溶損箇所の熱
間吹付補修技術が行なわれている。Since this alone is insufficient, a hot spray repair technique for localized melting damage has been used as a technique to compensate for this and ensure uniform melting damage in each part to some extent.
これらの補修方法として従来は
（１）スラグコーディング法
転炉吹鑓後に転炉スラグを例えば２５０ を転炉の場合
２〜６を残し、これに媒溶剤として軽ドロマイト及び生
ドロマイトを夫々０．５〜３トン投入し２〜５回炉を傾
動しスラグを冷却しながら炉底と及びスラグの粘性が高
くなりれんがへのスラグの浸入が減少する利点がある。Conventional methods for repairing these methods include (1) Slag Coding Method After blowing out the converter, the converter slag is left with 250 slag, for example, 2 to 6 in the case of a converter, and 0.5 each of light dolomite and fresh dolomite are added to this as a solvent. The advantage is that the viscosity of the slag at the bottom of the furnace and the slag increases while cooling the slag by injecting ~3 tons and tilting the furnace 2 to 5 times to reduce infiltration of the slag into the bricks.
然しドロマイトは付着性に欠け、耐用性もや〜落ち０〜
１チヤージの吹錬で剥落する欠点がある。However, dolomite lacks adhesion and its durability is 0 to 0.
It has the disadvantage that it flakes off after one charge of blowing.
（２）ニーダ補修
前述の欠点を防止するため、吹錬終了後、全量排滓し、
炉内にニーダ材を１〜２トン投入し炉壁に焼き付けを２
〜６時間実施し完全に固めこれにより炉内耐火物を保護
する。(2) Kneader repair In order to prevent the above-mentioned drawbacks, after the completion of blowing, drain all the slag,
Put 1 to 2 tons of kneader material into the furnace and bake it on the furnace wall.
This was carried out for ~6 hours to completely harden and protect the refractories in the furnace.
ここでニーダ材とは、転炉出鋼口、炉腹焼付補修用焼付
材でタールバインダ系石油系非レジンタイプバインダ系
があり例えば第２我に示す如く品川白煉瓦株式会社製つ
ＨＤ−６，ＨＤ−１，ＮＨ−１がある。Here, the kneader material is a baking material for repairing the converter tapping port and the furnace belly, and includes a tar binder-based petroleum-based non-resin binder type, such as HD-6 made by Shinagawa Shiroenga Co., Ltd. , HD-1, and NH-1.
このニーダ材（焼付材）単味を用いた場合は、付着性は
良好であるが、所要時間を要するとともに耐用は数チャ
ージであり、この改善がかねてから要望されていた。When this kneaded material (baked material) alone is used, the adhesion is good, but it takes time and the durability is only a few charges, and an improvement in this has been desired for some time.
本発明は、従来技術に述べた方法より優れた転炉の炉内
耐火物の保護方法を提供することを目的とするものであ
る。The object of the present invention is to provide a method for protecting refractories in a converter that is superior to the methods described in the prior art.
本発明は、転炉吹錬後、スラグを一部残留せしめドロマ
イトを適量投入あるいは投入せずにニーダ材を添加し該
炉を傾動し、前記スラグ及びニーダ材またはスラグ、ド
ロマイト及びニーダ材の混合物を炉内耐火物に付着せし
めることを特徴とする転炉の炉内耐火物保護方法であり
、更に前記スラグとニーダ材の配合比を４〜１０：１と
することにより本発明の目的を達成するものである。In the present invention, after blowing in a converter furnace, some slag remains, a suitable amount of dolomite is added, or a kneader material is added without adding dolomite, the furnace is tilted, and the slag and kneader material or a mixture of slag, dolomite and kneader material are mixed. A method for protecting refractories in a converter furnace, characterized by adhering the slag to the refractories in the furnace, and further achieves the object of the present invention by setting the mixing ratio of the slag and kneader material to 4 to 10:1. It is something to do.
本発明は転炉吹錬後、スラグを一部残留せしめるもので
あるが、これはスラグ中の有効成分特にＭｇを利用する
ためと粘性を高めること並びにその保持熱を利用するに
あるもので、その残留量は転炉への装入量によって定ま
り装入量の１０〜１５チ残留せしめることが好ましい。The present invention allows some slag to remain after converter blowing, and this is to utilize the active ingredients in the slag, especially Mg, increase viscosity, and utilize its retained heat. The residual amount is determined by the amount charged into the converter, and it is preferable to leave 10 to 15 grams of the amount charged.
またスラグとニーダ材の配合比は４〜１０：１好ましく
は５〜７：１の範囲になるようニーダ材を投入すればよ
い。Further, the kneader material may be added so that the mixing ratio of slag and kneader material is in the range of 4 to 10:1, preferably 5 to 7:1.
なおドロマイトはスラグ中のＭｇ０１１度が低下してい
る場合適宜添加すると炉内耐火物の保護には更に有効と
なる。Note that if dolomite is appropriately added when the Mg011 degree in the slag is lowered, it will be more effective in protecting the refractories in the furnace.
本発明方法の場合のスラグ及びニーダ材の付着時間は６
０分〜１時間で従来のニーダ焼付けに比べ短時間であり
、またニーダ材の使用量も約２０〜５０％低減しても同
程度の炉体保護が可能である。In the case of the method of the present invention, the adhesion time of slag and kneader material is 6
It takes 0 minutes to 1 hour, which is a shorter time than conventional kneader baking, and even if the amount of kneader material used is reduced by about 20 to 50%, it is possible to protect the furnace body to the same degree.
また付着後の強度は従来法より固く、スクラップ装入時
の衝撃緩和の作用も行なう。Furthermore, the strength after adhesion is higher than that of conventional methods, and it also acts as a shock absorber when charging scrap.
欠に実施例について述べる。An example will be briefly described.
第１図及び第２図に示す如き転炉１にて吹錬後スラグ６
を炉内耐火物２上に残留せしめ、炉底コーティングの場
合は第１図の如く転炉１を直置のま〜ニーダ材４を炉上
から矢視する如く固形状のまへで投入する。Slag 6 after being blown in a converter 1 as shown in Figs. 1 and 2
remains on the refractory 2 in the furnace, and in the case of hearth bottom coating, the converter 1 is placed directly as shown in Fig. 1, and the kneader material 4 is introduced from the top of the furnace into a solid state as shown by the arrow. .
一方炉腹コーティングの場合は第２図の如く転炉１を９
０倒炉して炉前から矢視する如く添加する。この場合状
１練後の転炉々内温度は１６５０℃でニーダ材添加ｆｆ
１１４００℃となる。On the other hand, in the case of furnace belly coating, the converter 1 is
0. Turn the furnace over and add from the front of the furnace as shown by the arrow. In this case, the temperature inside the converter after 1st kneading is 1650℃ and kneader material is added.
It becomes 11400℃.
ニーダ材添加後約３０分〜１時間約７００℃に保持する
ことにより、スラグとニーダの混合物は保護部位に付着
固化した。After adding the kneader material, the mixture was maintained at about 700° C. for about 30 minutes to 1 hour, so that the mixture of slag and kneader adhered to the protected area and solidified.
その場合のスラグ及びニーダの配合比は次の第３衣の通
りである。In that case, the blending ratio of the slag and kneader is as shown in the third coating below.
第３我 ０はニーダ材１とした場合のスラグ配合比を示す。third self 0 indicates the slag blending ratio when kneader material 1 is used.
以上の結果炉内耐火物の補修回数は２０〜６０チの減少
となり、耐用性が向上することは明らかである。As a result of the above, it is clear that the number of repairs of the refractory in the furnace is reduced by 20 to 60 inches, and the durability is improved.
本発明の転炉の炉内耐火物保護方法は、所要時間も短く
耐火物の耐用向上に伴ない補修回数を減少せしめ、転炉
の稼動率をあげ、かつ補修用ニーダ材の使用量を減少せ
しめ得て生産性の向上と、コストの低減に資すること甚
だ大きい有用な方法である。The method for protecting refractories in a converter according to the present invention reduces the required time and improves the service life of refractories, reduces the number of repairs, increases the operating rate of the converter, and reduces the amount of kneader material used for repairs. This is an extremely useful method that can help improve productivity and reduce costs.
第１図及び第２図は実施例における転炉直置及び傾動の
場合の補修方法説明図。
図において、１：転炉 ２：耐火物、３ニスラグ、４：
二−ダ材。
各図中同一符号は同一または相当部分を示すものである
。FIG. 1 and FIG. 2 are explanatory diagrams of the repair method in the case of the converter installed directly and tilted in the embodiment. In the figure, 1: converter, 2: refractory, 3: varnish slag, 4:
Secondary material. The same reference numerals in each figure indicate the same or corresponding parts.
Claims (2)
トを適量投入あるいは投入せずにニーダ材を添加し該炉
を傾動し、前記スラグ及びニーダ材またはスラグ、ドロ
マイト及びニーダ材の混合物を炉内耐火物に付着せしめ
ることを特徴とする転炉の炉内耐火物保護方法。(1) After converter blowing, some slag remains, and a kneader material is added with or without adding an appropriate amount of dolomite, and the furnace is tilted to form the slag and kneader material or a mixture of slag, dolomite, and kneader material. 1. A method for protecting refractories in a converter furnace, characterized by adhering to the refractories in the furnace.
することを特徴とする特許請求の範囲第１項記載の転炉
の炉内耐火物保護方法。(2) The method for protecting refractories in a converter according to claim 1, wherein the mixing ratio of the slag and kneader material is 4 to 10:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17682885A JPS6240307A (en) | 1985-08-13 | 1985-08-13 | Method for protecting refractory in converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17682885A JPS6240307A (en) | 1985-08-13 | 1985-08-13 | Method for protecting refractory in converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6240307A true JPS6240307A (en) | 1987-02-21 |
Family
ID=16020549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17682885A Pending JPS6240307A (en) | 1985-08-13 | 1985-08-13 | Method for protecting refractory in converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6240307A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100489195B1 (en) * | 2000-12-22 | 2005-05-11 | 주식회사 포스코 | Recycling Method of Residual Castables for Teeming Ladle |
| KR100522347B1 (en) * | 2001-12-22 | 2005-10-18 | 주식회사 포스코 | Recycling method of residual castables using dolomite and slag |
| JP2008163369A (en) * | 2006-12-27 | 2008-07-17 | Kobe Steel Ltd | Method for charging cold iron source into converter |
-
1985
- 1985-08-13 JP JP17682885A patent/JPS6240307A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100489195B1 (en) * | 2000-12-22 | 2005-05-11 | 주식회사 포스코 | Recycling Method of Residual Castables for Teeming Ladle |
| KR100522347B1 (en) * | 2001-12-22 | 2005-10-18 | 주식회사 포스코 | Recycling method of residual castables using dolomite and slag |
| JP2008163369A (en) * | 2006-12-27 | 2008-07-17 | Kobe Steel Ltd | Method for charging cold iron source into converter |
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