JPH072573A - Alumina-magnesia amorphous refractory - Google Patents
Alumina-magnesia amorphous refractoryInfo
- Publication number
- JPH072573A JPH072573A JP5143174A JP14317493A JPH072573A JP H072573 A JPH072573 A JP H072573A JP 5143174 A JP5143174 A JP 5143174A JP 14317493 A JP14317493 A JP 14317493A JP H072573 A JPH072573 A JP H072573A
- Authority
- JP
- Japan
- Prior art keywords
- amorphous refractory
- alumina
- mgo
- raw material
- refractory
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00551—Refractory coatings, e.g. for tamping
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
- C04B2111/00887—Ferrous metallurgy
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融金属容器の内張り
耐火物として使用される流し込み用不定形耐火物に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a castable refractory used as a refractory lining for a molten metal container.
【０００２】[0002]
【従来の技術】近年、取鍋などの溶融金属容器の内張り
に使用する流し込み用不定形耐火物として、アルミナ質
不定形耐火物が使用されている。このアルミナ質不定形
耐火物は、その特性上耐スラグ浸潤性に劣るため、使用
中にスラグの浸潤による変質層が形成され、部分的に剥
落し、内張りされた不定形耐火物の寿命限界の判定が困
難であり、またその不定形耐火物が全体的には充分寿命
があるものの、部分的な剥落や溶損による致命傷によっ
て不定形耐火物全部を張り替えなければならないという
問題があった。2. Description of the Related Art In recent years, an alumina amorphous refractory has been used as a casting amorphous refractory for lining a molten metal container such as a ladle. Since this alumina-based amorphous refractory is inferior in slag infiltration resistance due to its characteristics, an altered layer is formed due to the infiltration of slag during use and is partially peeled off, and the life of the amorphous refractory lining is limited. Although the determination is difficult and the amorphous refractory has a sufficient life as a whole, there is a problem in that the entire amorphous refractory must be replaced due to fatal damage caused by partial peeling or melting damage.
【０００３】そこで、特開平１−87577 号公報および特
開平２−221165号公報には、アルミナ質不定形耐火物に
粒径１mm以下の微粉のスピネルクリンカーを配合するこ
とによって、スラグの浸潤を抑制する方法が開示されて
いる。Therefore, in JP-A-1-87577 and JP-A-2-221165, infiltration of slag is suppressed by incorporating a fine powder spinel clinker having a particle size of 1 mm or less into an alumina-based amorphous refractory material. A method of doing so is disclosed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、粒径１
mm以下の微粉のスピネルクリンカーを配合する前記特開
平１−87577 号公報および特開平２−221165号公報に開
示された方法によれば、アルミナ質不定形耐火物の耐ス
ラグ浸潤性を増すことにはなるが、結合剤としてアルミ
ナセメントを使用しているため、該アルミナセメント自
身に含有されているＣａＯ成分が、使用時の受熱により
骨材成分中のＡｌ2Ｏ3 と反応し、低融点化合物を生成
することから、耐食性が不充分であり、高級鋼の溶製の
場合、前記アルミナ質不定形耐火物がさらに長時間高温
に曝されるので、取鍋の内張り耐火物の寿命延長を図る
には困難な問題がある。However, the particle size 1
According to the methods disclosed in the above-mentioned JP-A-1-87577 and JP-A-2-221165, in which a fine powder spinel clinker having a size of less than mm is blended, it is possible to increase the slag infiltration resistance of an alumina-based amorphous refractory material. However, since alumina cement is used as a binder, the CaO component contained in the alumina cement itself reacts with Al 2 O 3 in the aggregate component due to the heat received during use, resulting in a low melting point compound. Corrosion resistance is inadequate, and in the case of melting high-grade steel, the alumina-shaped amorphous refractory is exposed to high temperatures for a longer period of time. Has a difficult problem.
【０００５】本発明は、前記課題を解決したアルミナ−
マグネシア系不定形耐火物を提供することを目的とす
る。The present invention is directed to an alumina-based material which solves the above problems.
It is intended to provide a magnesia-based amorphous refractory material.
【０００６】[0006]
【課題を解決するための手段】本発明は、Ａｌ2Ｏ3 お
よびＭｇＯを主成分とするスピネル原料および／または
ＭｇＯを主成分とするマグネシア原料を５〜50重量％
と、残部をＡｌ2Ｏ3 90％以上含有するアルミナ原料と
からなる骨材粉末に、結合剤としてシリカゾルを添加し
てなることを特徴とするアルミナ−マグネシア系不定形
耐火物である。According to the present invention, a spinel raw material containing Al 2 O 3 and MgO as a main component and / or a magnesia raw material containing MgO as a main component is contained in an amount of 5 to 50% by weight.
And an alumina powder containing an alumina raw material containing the balance of Al 2 O 3 in an amount of 90% or more and silica sol as a binder.
【０００７】[0007]
【作 用】本発明によれば、Ａｌ2Ｏ3 およびＭｇＯを
主成分とするスピネル原料および／またはＭｇＯを主成
分とするマグネシア原料を５〜50重量％と、残部をＡｌ
2Ｏ3 90％以上含有するアルミナ原料とからなる骨材粉
末に、シリカゾルを添加したので、不定形耐火物の耐ス
ラグ浸潤性および耐食性が飛躍的に向上する。[Operation] According to the present invention, the spinel raw material containing Al 2 O 3 and MgO as main components and / or the magnesia raw material containing MgO as the main component is 5 to 50% by weight, and the balance is Al.
Since silica sol is added to the aggregate powder made of an alumina raw material containing 90% or more of 2 O 3 , the slag infiltration resistance and the corrosion resistance of the amorphous refractory material are dramatically improved.
【０００８】なお、ＭｇＯやＡｌ2Ｏ3 を主成分とする
スピネルクリンカーまたはマグネシアクリンカーの配合
量が５重量％未満の場合、スラグ中のＦｅＯまたはＦｅ
2Ｏ3 成分との反応量が少なく、不定形耐火物の稼働表面
に浸潤するスラグが高融点性および高粘性にならず、耐
食性の効果が少ない。また、前記スピネルおよびマグネ
シアクリンカーを50％以上配合すると、高温に曝された
場合、ＭｇＯ成分の高膨張特性により容積安定性を欠
き、組織を破壊する。Incidentally, MgO and Al2O3Is the main component
Combination of spinel clinker or magnesia clinker
If the amount is less than 5% by weight, FeO or Fe in the slag
2O3 Small amount of reaction with components, working surface of amorphous refractory
The slag that infiltrates into the steel does not have high melting point and high viscosity,
Has little food effect. Also, the spinel and the magnet
When 50% or more of sialinker was added, it was exposed to high temperature
In this case, volume stability is lacking due to the high expansion characteristics of the MgO component.
Destroy the tissue.
【０００９】ところで、アルミナ系不定形耐火物におい
て、１mm以下の粒度でＭｇＯ成分を配合するとスラグ浸
潤抑止効果が大きいが、これはスラグ中のＦｅＯまたは
Ｆｅ 2Ｏ3 成分と耐火物中のＭｇＯ成分との反応により
スラグを高融点、高粘性化させて耐火物中にスラグが浸
潤し難くなるためであり、ＭｇＯ成分を含有するスピネ
ルクリンカーまたはＭｇＯクリンカーを配合しても同様
な効果を得ることができる。[0009] By the way, the smell of alumina type amorphous refractory
Therefore, if the MgO component is mixed with a particle size of 1 mm or less, slag immersion will occur.
It has a great effect of suppressing moisture, but this is due to FeO in the slag or
Fe 2O3By the reaction of the components with the MgO component in the refractory
Immerse the slag in the refractory by increasing the melting point and viscosity of the slag.
This is because it becomes difficult to moisten the spine containing the MgO component.
Same with luclinker or MgO clinker
It is possible to obtain various effects.
【００１０】また、１mmを超えた粒度のスピネルおよび
／またはマグネシアクリンカーの配合量を増せば不定形
耐火物の耐食性を向上させることができる。前記スピネ
ルおよびマグネシアクリンカーの粒度については、スラ
グ浸潤抑制に効果のある１mm以下の粒度と、不定形耐火
物の耐食性向上に効果のある１mmを超えた粒度を該不定
形耐火物の使用条件に従って好ましい粒度配合とする。Further, the corrosion resistance of the amorphous refractory can be improved by increasing the blending amount of spinel and / or magnesia clinker having a particle size of more than 1 mm. Regarding the particle size of the spinel and the magnesia clinker, a particle size of 1 mm or less that is effective in suppressing slag infiltration and a particle size of more than 1 mm that is effective in improving the corrosion resistance of the amorphous refractory are preferred according to the usage conditions of the amorphous refractory. The particle size is mixed.
【００１１】残部の骨材粉末をＡｌ2Ｏ3 含有量90％以
上の高耐食性アルミナクリンカーにすることにより、耐
食性や耐スラグ浸潤性を向上させる。一般の不定形耐火
物には硬化剤としてアルミナセメントを使用している
が、その硬化剤の耐火物に対する影響として、図１にア
ルミナセメントの添加量と不定形耐火物の溶損指数との
関係を示しているが、アルミナセメントの添加量を減少
させると、不定形耐火物の溶損指数が小さくなる。すな
わち、耐食性が向上する。By making the remaining aggregate powder into a high corrosion resistant alumina clinker having an Al 2 O 3 content of 90% or more, the corrosion resistance and the slag infiltration resistance are improved. Alumina cement is used as a hardening agent for general amorphous refractories. As an effect of the hardening agent on the refractory material, Fig. 1 shows the relationship between the amount of alumina cement added and the melting index of the amorphous refractory material. However, when the amount of alumina cement added is decreased, the melting index of the amorphous refractory becomes smaller. That is, the corrosion resistance is improved.
【００１２】これは、アルミナセメント中に含まれるＣ
ａＯ成分が使用時の受熱により骨材成分中のＡｌ2Ｏ3
と反応し、ＣａＯ−Ａｌ2Ｏ3 系の低融点化合物を生成
するため、アルミナセメントの量を減じることにより耐
食性が向上するが、不定形耐火物の硬化のためには最低
量のアルミナセメントが必要であり、耐食性の向上には
限度がある。This is the C contained in the alumina cement.
When the aO component receives heat during use, Al 2 O 3 in the aggregate component
Since it reacts with CaO-Al 2 O 3 to form a low melting point compound, the corrosion resistance is improved by reducing the amount of alumina cement, but the minimum amount of alumina cement is required for hardening of amorphous refractory. It is necessary and there is a limit to the improvement of corrosion resistance.
【００１３】そのため、不定形耐火物の結合剤として、
アルミナセメントの代わりに、シリカゾルを使用するこ
とにより、ＣａＯ−Ａｌ2Ｏ3 系の低融点化合物を生成
せずに不定形耐火物の骨材粉末を結合することが可能で
ある。シリカゾルについては、ＳｉＯ2 成分５〜50重量
％含有するものを４〜10重量％使用することが好まし
く、ＳｉＯ2 成分５重量％未満のシリカゾルでは結合機
能を果たさず、ＳｉＯ2 成分50重量％を超えるシリカゾ
ルは粘性過多となり、分散効果を満たさない。Therefore, as a binder for amorphous refractories,
By using silica sol instead of alumina cement, it is possible to bond the aggregate powder of the amorphous refractory without forming the CaO—Al 2 O 3 -based low melting point compound. The silica sol, it is preferable to use one containing 5 to 50 wt% SiO 2 component 4 to 10% by weight, the silica sol of SiO less than 2 component 5 wt% does not play a binding function, the SiO 2 component 50 wt% If the silica sol exceeds the above range, the viscosity becomes excessive and the dispersion effect is not satisfied.
【００１４】このシリカゾルの添加量が４重量％未満で
は、流し込み材の流動性が得られず施工不能となり、10
重量％を超えると施工体が多孔質となり耐食性が劣る。
その他必要に応じて硬化剤としてアルミナセメントや微
粉のＭｇＯ粒を使用してもよいが、その使用量は１重量
％未満に留めるべきである。If the amount of the silica sol added is less than 4% by weight, the flowability of the casting material cannot be obtained and the work cannot be performed.
If it exceeds 5% by weight, the construction body is porous and the corrosion resistance is poor.
In addition, alumina cement or fine powder of MgO particles may be used as a hardening agent if necessary, but the amount used should be less than 1% by weight.
【００１５】[0015]
【実施例】以下に本発明の実施例について表を参照して
説明する。実施例１として、試料の配合を示す表１の各
原料を配合し、添加水分６％で流し込み不定形耐火物を
調整して内径40×40×160mm の金型に鋳込み成形して供
試材を作製し、次に110 ℃で24時間乾燥後、回転式スラ
グ浸食試験機で浸食剤（転炉スラグ：普通鋼＝１：１）
を用い、温度1650℃で３時間浸食試験を行った。EXAMPLES Examples of the present invention will be described below with reference to the tables. As Example 1, the materials shown in Table 1 showing the composition of the sample are blended, poured with 6% of the added water to adjust the amorphous refractory, and cast into a mold having an inner diameter of 40 × 40 × 160 mm to be a test material. And then dried at 110 ° C for 24 hours, and then eroded with a rotary slag erosion tester (converter slag: normal steel = 1: 1).
Was used to perform an erosion test at a temperature of 1650 ° C. for 3 hours.
【００１６】[0016]
【表１】 [Table 1]
【００１７】試験後、供試材を取り出しその溶損量およ
びスラグ浸潤量を測定し、比較例１の溶損指数とスラグ
浸潤指数を100 として本発明の相対値を表２に示した。After the test, the test material was taken out and the amount of erosion loss and the amount of slag infiltration were measured. The relative values of the present invention are shown in Table 2 with the erosion index and slag infiltration index of Comparative Example 1 being 100.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２に示す結果から、本発明の不定形耐火
物は耐スラグ浸潤性および耐食性とも比較例に比べて極
めて優れていることが判明した。次に、実施例２とし
て、表２に示した本発明の試料番号１、６および８の配
合の不定形耐火物を100 ｔ取鍋のスラグライン部に添加
水分6.0 ％で施工し、受鋼したところ、取鍋のライニン
グの寿命は、試料番号１の不定形耐火物の場合102チャ
ージ、試料番号６の不定形耐火物の場合120 チャージ、
試料記号８の不定形耐火物の場合160 チャージであっ
た。From the results shown in Table 2, it was found that the amorphous refractory material of the present invention is extremely superior in both slag infiltration resistance and corrosion resistance to the comparative example. Next, as Example 2, an amorphous refractory having the composition of Sample Nos. 1, 6 and 8 of the present invention shown in Table 2 was applied to the slag line portion of a 100-ton ladle with a water content of 6.0% to receive steel. As a result, the life of the ladle lining was 102 charges for the amorphous refractory of sample number 1 and 120 charges for the amorphous refractory of sample number 6,
In the case of the amorphous refractory of sample code 8, it was 160 charges.
【００２０】従来の取鍋の不定形耐火物の寿命は60チャ
ージであり、本発明の不定形耐火物を使用することによ
り、取鍋のライニングの寿命を大幅に延長することがで
きた。なお、本発明の不定形耐火物は、タンディッシュ
や他の溶融金属容器にも使用可能であり、同様の効果を
得ることができる。The life of the irregular shaped refractory of the conventional ladle is 60 charges, and by using the irregular shaped refractory of the present invention, the life of the lining of the ladle can be greatly extended. The amorphous refractory material of the present invention can be used in a tundish or another molten metal container, and the same effect can be obtained.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の不定形耐
火物を取鍋に使用することにより、不定形耐火物の耐ス
ラグ浸潤性および耐食性が飛躍的に向上した結果、取鍋
のライニングの寿命延長を図ることができ、不定形耐火
物の使用原単位の削減や修理費の削減が可能になる。As described above, by using the amorphous refractory of the present invention in a ladle, the slag infiltration resistance and corrosion resistance of the irregular refractory are dramatically improved, and as a result, the lining of the ladle is obtained. The life of the refractory can be extended, and it is possible to reduce the unit consumption of irregular shaped refractory and repair costs.
【００２２】また他の溶融金属容器においても同様の結
果を得ることが可能である。Similar results can be obtained in other molten metal containers.
【図１】不定形耐火物に添加するアルミナセメントの量
と不定形耐火物の溶損指数との関係を示す特性図であ
る。FIG. 1 is a characteristic diagram showing the relationship between the amount of alumina cement added to an amorphous refractory and the melting index of the irregular refractory.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 衛藤 昭二 兵庫県赤穂市中広字東沖1576番地２号 川 崎炉材株式会社内 (72)発明者 森 淳一郎 兵庫県赤穂市中広字東沖1576番地２号 川 崎炉材株式会社内 (72)発明者 人見 正一 兵庫県赤穂市中広字東沖1576番地２号 川 崎炉材株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shoji Eto Inoue Nakahiro, Ako-shi, Hyogo 1576 No. 2 in Kawasaki Furnace Co., Ltd. 1576 No. 2 Kawasaki Furnace Co., Ltd. (72) Inventor Shoichi Hitomi 1576 No. 2 Kawasakizaki Furnace Co., Ltd., Tohoku, Nakahiro, Ako City, Hyogo Prefecture
Claims (1)
スピネル原料および／またはＭｇＯを主成分とするマグ
ネシア原料を５〜50重量％と、残部をＡｌ2Ｏ3 90％以
上含有するアルミナ原料とからなる骨材粉末に、結合剤
としてシリカゾルを添加してなることを特徴とするアル
ミナ−マグネシア系不定形耐火物。1. An alumina raw material containing 5 to 50% by weight of a spinel raw material containing Al 2 O 3 and MgO as main components and / or a magnesia raw material containing MgO as a main component, and the balance containing 90% or more of Al 2 O 3. An alumina-magnesia-based amorphous refractory, characterized in that silica sol is added as a binder to an aggregate powder consisting of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143174A JPH072573A (en) | 1993-06-15 | 1993-06-15 | Alumina-magnesia amorphous refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143174A JPH072573A (en) | 1993-06-15 | 1993-06-15 | Alumina-magnesia amorphous refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH072573A true JPH072573A (en) | 1995-01-06 |
Family
ID=15332639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5143174A Pending JPH072573A (en) | 1993-06-15 | 1993-06-15 | Alumina-magnesia amorphous refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH072573A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100332903B1 (en) * | 1997-10-06 | 2002-06-20 | 신현준 | Dry charging refractory for induction furnace |
| JP2022026926A (en) * | 2020-07-31 | 2022-02-10 | Ｊｆｅスチール株式会社 | Monolithic refractory |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141480A (en) * | 1988-11-21 | 1990-05-30 | Kawasaki Refract Co Ltd | Castable refractory |
-
1993
- 1993-06-15 JP JP5143174A patent/JPH072573A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141480A (en) * | 1988-11-21 | 1990-05-30 | Kawasaki Refract Co Ltd | Castable refractory |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100332903B1 (en) * | 1997-10-06 | 2002-06-20 | 신현준 | Dry charging refractory for induction furnace |
| JP2022026926A (en) * | 2020-07-31 | 2022-02-10 | Ｊｆｅスチール株式会社 | Monolithic refractory |
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