JPH08145576A - Irregular shaped refractory for steel furnace gutter - Google Patents
Irregular shaped refractory for steel furnace gutterInfo
- Publication number
- JPH08145576A JPH08145576A JP6306891A JP30689194A JPH08145576A JP H08145576 A JPH08145576 A JP H08145576A JP 6306891 A JP6306891 A JP 6306891A JP 30689194 A JP30689194 A JP 30689194A JP H08145576 A JPH08145576 A JP H08145576A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- alumina
- weight
- silicon carbide
- slag
- 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
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Charging Or Discharging (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】
【目的】本発明は、電気炉出鋼樋として安定した耐用を
得るために、地金やスラグの付着を防止し、高耐スポー
ル性，高耐食性を有する耐火物を提供する。
【構成】アルミナ−シリカ−炭化珪素−カーボン系およ
びアルミナスピネル−炭化珪素−カーボン系不定形耐火
物組成において窒化珪素 1〜15重量％，ジルコン10〜50
重量％および結合剤を配合してなることを特徴とする不
定形耐火物およびブロック。(57) [Abstract] [Purpose] The present invention provides a refractory having high spall resistance and high corrosion resistance by preventing adhesion of metal or slag in order to obtain stable service life as an electric furnace discharge gutter. To do. [Structure] Alumina-silica-silicon carbide-carbon type and alumina spinel-silicon carbide-carbon type amorphous refractory composition 1 to 15% by weight silicon nitride, 10 to 50% zircon
An amorphous refractory and a block, which are characterized by containing a weight% and a binder.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気炉出鋼樋の流し込
み施工用内張り耐火物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory lining for pouring construction of an electric furnace tap steel gutter.
【０００２】[0002]
【従来の技術】電気炉出鋼樋(以下樋という)は出鋼時高
温の溶鋼やスラグにより損傷を受ける。また出鋼及び休
止による急激な温度変化により亀裂，剥離が発生する。
現在一般に使用されている樋は、アルミナ−炭化珪素−
カーボン質耐火物およびジルコン質耐火物が使用されて
いる。アルミナ−炭化珪素−カーボン質耐火物は熱膨張
係数が大きいため耐スポール性に劣り、先端部での亀裂
を生じやすいこと，および熱伝導率が高いために、先端
部で地金やスラグ付着を生じやすく、出鋼時に溶鋼の乱
れを生ずる欠点を有する。またジルコン質耐火物は先端
部での溶鋼やスラグ付着がないが、耐食性に劣るという
欠陥を有している。2. Description of the Related Art An electric furnace tapping gutter (hereinafter referred to as a gutter) is damaged by molten steel and slag at a high temperature during tapping. In addition, cracking and peeling occur due to rapid temperature changes due to tapping and suspension.
Currently used gutter is alumina-silicon carbide-
Carbonaceous refractory and zircon refractory are used. Alumina-silicon carbide-carbon refractory has a large coefficient of thermal expansion and is inferior in spall resistance, and cracks easily occur at the tip, and high thermal conductivity prevents the adhesion of metal or slag at the tip. It is liable to occur and has a drawback that the molten steel is disturbed at the time of tapping. Further, the zircon refractory does not have molten steel or slag attached at the tip, but has a defect of poor corrosion resistance.
【０００３】[0003]
【発明が解決しようとする課題】本発明は安定した耐用
を得るために、地金やスラグの付着を防止し、高耐スポ
ール性でかつ高耐食性を有する耐火物を提供することに
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a refractory material which has a high spall resistance and a high corrosion resistance by preventing the adhesion of metal and slag in order to obtain a stable service life.
【０００４】[0004]
【課題を解決するための手段】本発明は電気炉出鋼樋に
流し込み施工するアルミナ−シリカ−炭化珪素−カーボ
ン系およびアルミナスピネル−炭化珪素−カーボン系不
定形耐火物組成において窒化珪素 1〜15重量％，ジルコ
ン 10〜50重量％および結合剤を配合してなることを特
徴とする不定形耐火物およびブロック。SUMMARY OF THE INVENTION The present invention relates to an alumina-silica-silicon carbide-carbon system and an alumina spinel-silicon carbide-carbon system amorphous refractory composition which is cast into an electric furnace discharge steel trough and has a silicon nitride content of 1 to 15%. An amorphous refractory and a block, characterized by being mixed with 10% by weight of zircon and 10% by weight of zircon and a binder.
【０００５】[0005]
【作用】発明者らは前述のような問題点を解決するた
め、アルミナ−シリカ−炭化珪素−カーボン系およびア
ルミナスピネル−炭化珪素−カーボン系耐火材に窒化珪
素とジルコンを併用することにより、耐食性を低下させ
ることなく、耐スポーリング性および使用温度域で稼働
面にガラス層を生成させ、地金およびスラグ付着を防止
できることを見いだした。窒化珪素は 1〜15重量％の範
囲で適当であり、これ未満ではガラス層を形成させるに
は不十分であり、15重量％より多い組成は耐熱衝撃性，
耐食性の低下を生じる。ジルコンは 10〜50重量％の範
囲が適当であり、10重量％未満ではガラス層の形成およ
び耐スポール性の向上を図るには不十分であり、50重量
％を越えると耐食性の低下を生じ好ましくない。In order to solve the above-mentioned problems, the inventors have used a combination of silicon nitride and zircon with an alumina-silica-silicon carbide-carbon type and an alumina spinel-silicon carbide-carbon type refractory material to improve corrosion resistance. It was found that the glass layer can be formed on the working surface in the spalling resistance and operating temperature range without deteriorating the ingot, and the adhesion of metal and slag can be prevented. Silicon nitride is suitable in the range of 1 to 15% by weight, and if it is less than this range, it is insufficient to form a glass layer.
This causes a decrease in corrosion resistance. Zircon is suitable in the range of 10 to 50% by weight, and if it is less than 10% by weight, it is insufficient to form a glass layer and improve spall resistance, and if it exceeds 50% by weight, corrosion resistance is lowered. Absent.
【０００６】なお、配合残部について特に規制はない
が、主原料として電融アルミナ，焼結アルミナ，ボーキ
サイト等のアルミナ原料もしくはシャモット質原料，，
スピネル質原料が使用可能であり、副原料として炭化珪
素および各種ピッチ，燐状黒鉛，人造黒鉛，コークス，
カーボンブラック等のカーボン原料を使用できる。結合
剤としてはアルミナセメント，超微粉シリカ，粘土，金
属アルミ粉等を使用することができ、その他分散剤等の
使用も可能である。There are no particular restrictions on the balance of the mixture, but as the main raw materials, alumina raw materials such as fused alumina, sintered alumina, bauxite or chamotte raw materials,
Spinel raw materials can be used, and as secondary raw materials, silicon carbide and various pitches, phosphorous graphite, artificial graphite, coke,
Carbon raw materials such as carbon black can be used. As the binder, alumina cement, ultrafine silica, clay, metallic aluminum powder or the like can be used, and other dispersants or the like can also be used.
【０００７】[0007]
【表１】 に実施例と比較例を示す。試験は流し込み後24時間養生
・硬化させた後脱枠し、110℃で24時間乾燥後の試料に
ついて実施した。回転浸食試験は浸食剤として塩基度
2.0 の電気炉スラグを用い、1500℃〜1650℃で 5時間浸
食させ冷却した後、試料断面の溶損深さを測定し比較例
２を 100 とした浸食指数で表示し、数値が小さいほど
浸食量が少ないことを示す。スポール試験は 1450℃ に
て 30分加熱後、空冷 30分を１サイクルとし 10サイク
ル実施し、試料の亀裂の有無およびその亀裂発生状況で
評価した。ガラス層の厚さは 1400℃で 3時間加熱後に
試料を切断し、生成ガラス層深さを加熱面からの寸法を
測定した。本発明品である実施例４と比較例２について
実炉による比較試験を行った結果、実施例４は地金およ
びスラグの付着はなく、亀裂の発生も見られなかった。
また耐食性についても同等の成績が得られた。[Table 1] Examples and comparative examples are shown in FIG. The test was carried out on the sample after curing and curing for 24 hours after casting, deframed, and dried at 110 ° C. for 24 hours. Rotational erosion test shows basicity as an erosion agent
Using an electric furnace slag of 2.0, the erosion depth of the cross section of the sample was measured after erosion and cooling at 1500 ° C to 1650 ° C for 5 hours, and the erosion index was set with Comparative Example 2 as 100. Indicates that the amount is small. In the spall test, after heating at 1450 ° C for 30 minutes, air cooling for 30 minutes was set as one cycle, and 10 cycles were carried out, and the presence or absence of cracks in the sample and the crack generation state were evaluated. The thickness of the glass layer was heated at 1400 ° C for 3 hours, after which the sample was cut, and the depth of the glass layer formed was measured from the heating surface. As a result of conducting a comparative test using an actual furnace for Example 4 and Comparative Example 2 which are the products of the present invention, Example 4 was free from the adhesion of metal and slag, and the generation of cracks was not observed.
Similar results were obtained for corrosion resistance.
【０００８】[0008]
【発明の効果】本発明の不定形耐火物組成によって形成
された出鋼樋は、耐食性をほとんど低下させることなく
耐スポーリング性に優れ、地金およびスラグ付着を防止
することができた。これによって使用中に亀裂が発生す
ることがなく、また出鋼に際し先端部に地金やスラグの
付着による溶鋼の乱れや飛散もなくなり、安定した耐用
が可能となった。INDUSTRIAL APPLICABILITY The tapping gutter formed by the amorphous refractory composition of the present invention has excellent spalling resistance with almost no deterioration in corrosion resistance, and can prevent adhesion of metal and slag. As a result, cracks do not occur during use, and when steel is tapped, the molten steel is not disturbed or scattered due to the adhesion of metal or slag to the tip, and stable service is possible.
Claims (1)
組成において窒化珪素1〜15重量％，ジルコン10〜50重
量％を含有し、残部はアルミナ−シリカ系，アルミナス
ピネル系，炭化珪素およびカーボン等の耐火材および結
合剤を配合してなることを特徴とする電気炉出鋼樋用不
定形耐火物および上記不定形耐火物を用いて流し込み成
形したブロック。1. A refractory composition for pouring into an electric furnace discharge gutter containing 1 to 15% by weight of silicon nitride and 10 to 50% by weight of zircon, and the balance of alumina-silica type, alumina spinel type, silicon carbide and An amorphous refractory for an electric furnace discharge gutter and a block cast using the irregular refractory, characterized by being mixed with a refractory material such as carbon and a binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6306891A JPH08145576A (en) | 1994-11-15 | 1994-11-15 | Irregular shaped refractory for steel furnace gutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6306891A JPH08145576A (en) | 1994-11-15 | 1994-11-15 | Irregular shaped refractory for steel furnace gutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08145576A true JPH08145576A (en) | 1996-06-07 |
Family
ID=17962506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6306891A Pending JPH08145576A (en) | 1994-11-15 | 1994-11-15 | Irregular shaped refractory for steel furnace gutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08145576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243371A (en) * | 2001-02-19 | 2002-08-28 | Nippon Steel Corp | Refractory lining and its construction method |
-
1994
- 1994-11-15 JP JP6306891A patent/JPH08145576A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243371A (en) * | 2001-02-19 | 2002-08-28 | Nippon Steel Corp | Refractory lining and its construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040316 |
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| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040721 |
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