JPH0597526A - Amorphous refractories for lining of ladle - Google Patents
Amorphous refractories for lining of ladleInfo
- Publication number
- JPH0597526A JPH0597526A JP3282154A JP28215491A JPH0597526A JP H0597526 A JPH0597526 A JP H0597526A JP 3282154 A JP3282154 A JP 3282154A JP 28215491 A JP28215491 A JP 28215491A JP H0597526 A JPH0597526 A JP H0597526A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- alumina
- spinel
- ladle
- 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.)
- Granted
Links
- 239000011819 refractory material Substances 0.000 title abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 31
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 8
- 230000001788 irregular Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 abstract description 9
- 229910052596 spinel Inorganic materials 0.000 description 20
- 239000011029 spinel Substances 0.000 description 20
- 239000002893 slag Substances 0.000 description 17
- 230000035515 penetration Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スラグ浸透が少なくて
耐用性に優れた取鍋内張り用不定形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 an amorphous refractory material for lining a ladle, which has a low slag penetration and is excellent in durability.
【０００２】[0002]
【従来の技術】取鍋内張り用不定形耐火物としては、近
年、アルミナ−スピネル質の不定形耐火物が用いられて
いる。2. Description of the Related Art In recent years, an alumina-spinel amorphous refractory has been used as an irregular refractory for ladle lining.
【０００３】この不定形耐火物の特徴は、主な浸透スラ
グ成分であるＦｅＯ、ＭｎＯ、ＣａＯ、ＳｉＯ2 のう
ち、ＦｅＯ、ＭｎＯの浸透をスピネル原料への固溶によ
って抑える一方、ＣａＯをアルミナ原料との反応によっ
てＣａＯ・６Ａｌ2 Ｏ3 等の高融点の結晶として晶出さ
せることで、スラグ成分をＳｉＯ2 に富む粘性の高いも
のに変え、スラグの浸透を抑えることにある、と報告さ
れている。The characteristic of this amorphous refractory is that among the main infiltrating slag components, FeO, MnO, CaO, and SiO 2 , the infiltration of FeO and MnO is suppressed by solid solution in the spinel raw material, while CaO is the alumina raw material. It has been reported that by crystallizing it as a high melting point crystal such as CaO · 6Al 2 O 3 by the reaction with it, the slag component is changed to a SiO 2 -rich one having a high viscosity and the permeation of the slag is suppressed. There is.
【０００４】アルミナ−スピネル質耐火物は、アルミナ
質耐火物やスピネル質耐火物と比べてスラグの浸透が少
なく、構造スポーリングが発生し難いものであるが、そ
れでもなお充分とはいえず、耐用性の向上が望まれてい
る。Alumina-spinel refractory has less penetration of slag than alumina refractory and spinel refractory, and structural spalling is less likely to occur. The improvement of the sex is desired.
【０００５】スピネル原料とアルミナ原料のいずれにお
いても、スラグとの反応による浸透防止効果は、粒子径
の細かいものの方が優れ、０．１ｍｍ以下の粒度で使用
することが好ましい。In both of the spinel raw material and the alumina raw material, the effect of preventing permeation by the reaction with slag is better when the particle diameter is smaller, and it is preferable to use the particle diameter of 0.1 mm or less.
【０００６】しかし、流し込み用不定形材料として適当
な粒径０．１ｍｍ以下の微粉量は、同一比重であれば２
０〜４０％の範囲にあり、このような範囲内でスピネル
原料とアルミナ原料を共に使用した場合には、スピネル
原料のＦｅＯ、ＭｎＯ固溶効果およびアルミナ原料のＣ
ａＯ・６Ａｌ2 Ｏ3 晶出効果の双方または一方が不充分
となる。However, the amount of fine powder having a particle size of 0.1 mm or less, which is suitable as a castable amorphous material, is 2 if the specific gravity is the same.
When the spinel raw material and the alumina raw material are both used within such a range, FeO and MnO solid solution effects of the spinel raw material and C of the alumina raw material are obtained.
Either or both of the aO.6Al 2 O 3 crystallization effects are insufficient.
【０００７】現状のアルミナ−スピネル質不定形耐火物
では、スピネル原料を１ｍｍ以下の細粒で１０〜３０ｗ
ｔ％使用し、０．１ｍｍ以下の微粉をアルミナ原料で構
成するのが一般的であるが、スピネル原料の粒径が粗い
ため、ＦｅＯ、ＭｎＯの浸透防止効果は充分ではなく、
取鍋内張り用不定形耐火物としては依然として問題が残
されている。In the current alumina-spinel amorphous refractory, the spinel raw material is 10 to 30 w in the form of fine particles of 1 mm or less.
It is general that t% is used and fine powder of 0.1 mm or less is composed of an alumina raw material, but since the particle diameter of the spinel raw material is coarse, the effect of preventing penetration of FeO and MnO is not sufficient,
A problem still remains as an irregular refractory for ladle lining.
【０００８】[0008]
【発明が解決しようとする課題】従って本発明の目的
は、耐スラグ浸透性が向上し、耐用性に優れた取鍋内張
り不定形耐火物を提供することである。SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a ladle-lined amorphous refractory having improved slag penetration resistance and excellent durability.
【０００９】[0009]
【課題を解決するための手段】本発明者等は種々の研究
と検討の結果、粒径０．１ｍｍ以下のマグネシア系原料
を３〜１０ｗｔ％、アルミナセメントを３〜１０ｗｔ％
使用し、炉材中のＭｇＯ含有量が３〜１０ｗｔ％の範囲
にある場合、従来のスピネル使用品よりも耐スラグ浸透
性が格段に向上し、取鍋内張り用に適した不定形耐火物
が得られることを見出し、本発明を完成するに至った。As a result of various studies and investigations, the present inventors have found that the magnesia-based raw material having a particle size of 0.1 mm or less is 3 to 10 wt% and the alumina cement is 3 to 10 wt%.
When used and the MgO content in the furnace material is in the range of 3 to 10 wt%, the slag penetration resistance is markedly improved compared to conventional spinel products, and an amorphous refractory suitable for ladle lining is obtained. They have found that they can be obtained and have completed the present invention.
【００１０】マグネシア系原料は稼働面付近において、
侵入したスラグにより容易にアルミナ系原料（特に粒径
０．１ｍｍ以下のアルミナ微粉）と反応して、二次スピ
ネルを生成し、ＦｅＯ、ＭｎＯ成分を効果的に固溶す
る。更に低温側に侵入したＣａＯは、マグネシア系原料
と未反応の多量のアルミナ微粉により容易にＣａＯ・６
Ａｌ2 Ｏ3 を晶出し、スラグは高粘性化される。このこ
とにより、従来のアルミナ−スピネル系流し込み材料で
は得られなかった優れた耐スラグ浸透性が得られる。The magnesia type raw material is
The invaded slag easily reacts with an alumina-based raw material (particularly, alumina fine powder having a particle size of 0.1 mm or less) to generate a secondary spinel, and effectively dissolves FeO and MnO components. CaO that has penetrated to the lower temperature side can be easily converted to CaO.6 by the large amount of fine alumina powder that has not reacted with the magnesia-based raw material.
Al 2 O 3 is crystallized and the slag is made highly viscous. As a result, excellent slag permeation resistance, which cannot be obtained by the conventional alumina-spinel casting material, can be obtained.
【００１１】本発明のマグネシア系原料としては、アル
ミナ原料と反応して二次スピネルを生成させるものであ
れば良いため、海水マグネシアクリンカーや電融マグネ
シアクリンカー、水酸化マグネシウム、炭酸マグネシウ
ム（天然鉱物としてはマグネサイト）等の使用が可能で
あるが、天然マグネシアクリンカーは水和反応による消
化の問題があり好ましくない。The magnesia-based raw material of the present invention may be any as long as it reacts with an alumina raw material to produce a secondary spinel, so that seawater magnesia clinker, electrofused magnesia clinker, magnesium hydroxide, magnesium carbonate (as a natural mineral) Can be used, but natural magnesia clinker is not preferred due to the problem of digestion due to hydration reaction.
【００１２】マグネシア系原料の粒径は０．１ｍｍ以下
とする。粒径が０．１ｍｍを越えると二次スピネルの生
成量が少ないので、スラグの浸透防止には効果的でな
い。The particle size of the magnesia raw material is 0.1 mm or less. If the particle size exceeds 0.1 mm, the amount of secondary spinel produced is small, so it is not effective in preventing the penetration of slag.
【００１３】マグネシア系原料の添加量は、炉材中のＭ
ｇＯ成分の含有量として１０ｗｔ％を越えると、二次ス
ピネルの生成に伴うアルミナ原料の相対的減少量が多く
なり過ぎるので、ＣａＯ成分の浸透防止効果が低下す
る。他方、ＭｇＯ成分の含有量が３ｗｔ％未満では、生
成二次スピネルがＦｅＯ、ＭｎＯ成分を固溶するには不
十分である。そのため、マグネシア系原料の添加量は、
好ましくは３〜１０ｗｔ％である。The amount of magnesia-based raw material added is M in the furnace material.
If the content of the gO component exceeds 10 wt%, the relative reduction amount of the alumina raw material due to the formation of the secondary spinel becomes too large, so that the effect of preventing penetration of the CaO component decreases. On the other hand, if the content of the MgO component is less than 3 wt%, the generated secondary spinel is insufficient to form a solid solution with the FeO and MnO components. Therefore, the amount of magnesia-based material added is
It is preferably 3 to 10 wt%.
【００１４】アルミナセメントとしては、ＣａＯ含有量
が２５ｗｔ％以下のもの、例えば高アルミナセメントや
ス−パ−高アルミナセメント等を使用する。アルミナセ
メントの添加量は、３ｗｔ％未満では強度が小さくて結
合剤としての機能を発揮せず、１０ｗｔ％を超えるとア
ルミナ原料との反応によるＣａＯ・６Ａ１2 Ｏ3 の生成
でアルミナ原料が減少し、二次スピネルの生成が不充分
となり、また、耐食性も低下する。したがって、アルミ
ナセメントの添加量は、３〜１０ｗｔ％が好ましい。As the alumina cement, one having a CaO content of 25 wt% or less, such as high-alumina cement or super-high-alumina cement, is used. The addition amount of the alumina cement is, is less than 3 wt% not function as binder strength is small, alumina raw material is reduced in the generation of CaO · 6A1 2 O 3 by reaction with the alumina raw material exceeds 10 wt% However, the formation of secondary spinel becomes insufficient, and the corrosion resistance is also reduced. Therefore, the addition amount of alumina cement is preferably 3 to 10 wt%.
【００１５】[0015]
【実施例】以下、実施例にて本発明の効果を具体的に説
明する。本発明の実施例（Ｎｏ．１〜５）と比較例（Ｎ
ｏ．６〜９）で用いた耐火原料の化学組織を表１に示
し、前記各実施例と比較例における配合割合（ｗｔ％）
を表２に示し、各試験結果を表３に示す。各実施例と比
較例は、いずれも所定の水量で耐火原料を型枠内に振動
鋳込み成形し、１１０℃×２４時間乾燥後、曲げ強さ、
線変化率、回転侵食の各試験を行った。EXAMPLES The effects of the present invention will be specifically described below with reference to examples. Examples of the present invention (Nos. 1 to 5) and comparative examples (N
o. The chemical structures of the refractory raw materials used in 6-9) are shown in Table 1, and the mixing ratio (wt%) in each of the Examples and Comparative Examples is shown.
Is shown in Table 2, and the test results are shown in Table 3. In each of the Examples and Comparative Examples, the refractory raw material was vibration-cast into a mold with a predetermined amount of water, dried at 110 ° C. for 24 hours, and then flexural strength was measured.
Each test of the rate of line change and rotary erosion was performed.
【００１６】これらの試験方法は、次の通りである。 曲げ強さ：ＪＩＳーＲ２５５３に準じる。 線変化率：ＪＩＳーＲ２５５４に準じる。 回転侵食：溶鋼取鍋スラグを使用して１６００℃×３時
間行い、溶損及びスラグ浸透量を測定した。These test methods are as follows. Bending strength: According to JIS-R2553. Line change rate: According to JIS-R2554. Rotational erosion: Using molten steel ladle slag, it was performed at 1600 ° C. for 3 hours, and the melting loss and the amount of slag permeation were measured.
【表１】 [Table 1]
【表２】 [Table 2]
【表３】 [Table 3]
【００１７】上記したＮｏ．４の実施例とＮｏ．６の比
較例について行った実炉試験の結果を表４に示す。この
実施例の不定形耐火物はスラグの浸透が少なく、比較例
の２倍以上の耐用性を示した。The above-mentioned No. Example 4 and No. 4 Table 4 shows the results of the actual furnace test conducted on the comparative examples of No. 6 below. The amorphous refractory material of this example had less penetration of slag, and exhibited durability twice or more that of the comparative example.
【表４】 [Table 4]
【００１８】[0018]
【発明の効果】以上のように本発明の取鍋内張り用不定
形耐火物では、粒経０．１ｍｍ以下のマグネシア系原料
を添加することによって、従来のアルミナ−スピネル質
不定形耐火物よりも格段に耐スラグ浸透性を向上させる
ことができた。これによって、取鍋の加熱及び冷却時に
スラグの浸透によって起こる構造スポーリングを抑える
ことができ、実炉使用結果においても従来のアルミナ−
スピネル質不定形耐火物と比べて２倍以上の耐用性を示
した。As described above, in the amorphous refractory for ladle lining of the present invention, by adding a magnesia-based raw material having a grain size of 0.1 mm or less, the conventional refractory of alumina-spinel irregular shape is added The slag penetration resistance could be improved significantly. As a result, structural spalling caused by slag infiltration during heating and cooling of the ladle can be suppressed, and even in the result of using the actual furnace, the conventional alumina-
The durability was more than twice as high as that of spinel amorphous refractory.
Claims (1)
３〜１０ｗｔ％、 アルミナセメント３〜１０ｗｔ％、残
部をアルミナ系原料にて構成される耐火物原料１００ｗ
ｔ％において、ＭｇＯ含有量が３〜１０ｗｔ％の範囲に
ある取鍋内張り用不定形耐火物。1. A refractory raw material 100 w having a grain diameter of 0.1 mm or less, 3 to 10 wt% of a magnesia-based raw material, 3 to 10 wt% of alumina cement, and the remainder being an alumina-based raw material.
Irregular refractory for ladle lining having a MgO content in the range of 3 to 10 wt% at t%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3282154A JPH07106946B2 (en) | 1991-10-02 | 1991-10-02 | Unshaped refractory for ladle lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3282154A JPH07106946B2 (en) | 1991-10-02 | 1991-10-02 | Unshaped refractory for ladle lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0597526A true JPH0597526A (en) | 1993-04-20 |
| JPH07106946B2 JPH07106946B2 (en) | 1995-11-15 |
Family
ID=17648808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3282154A Expired - Fee Related JPH07106946B2 (en) | 1991-10-02 | 1991-10-02 | Unshaped refractory for ladle lining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106946B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002519302A (en) * | 1998-07-06 | 2002-07-02 | シーメンス アクチエンゲゼルシヤフト | Molding material for producing refractory lining and fired molded member, lining, and method for producing molded member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59232973A (en) * | 1983-06-13 | 1984-12-27 | ハリマセラミック株式会社 | Castable refractories for molten metal treating lance |
| JPH03109273A (en) * | 1989-09-22 | 1991-05-09 | Nippon Steel Corp | Monolithic refractory |
-
1991
- 1991-10-02 JP JP3282154A patent/JPH07106946B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59232973A (en) * | 1983-06-13 | 1984-12-27 | ハリマセラミック株式会社 | Castable refractories for molten metal treating lance |
| JPH03109273A (en) * | 1989-09-22 | 1991-05-09 | Nippon Steel Corp | Monolithic refractory |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002519302A (en) * | 1998-07-06 | 2002-07-02 | シーメンス アクチエンゲゼルシヤフト | Molding material for producing refractory lining and fired molded member, lining, and method for producing molded member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07106946B2 (en) | 1995-11-15 |
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