JPH0339031B2 - - Google Patents
Info
- Publication number
- JPH0339031B2 JPH0339031B2 JP57227526A JP22752682A JPH0339031B2 JP H0339031 B2 JPH0339031 B2 JP H0339031B2 JP 57227526 A JP57227526 A JP 57227526A JP 22752682 A JP22752682 A JP 22752682A JP H0339031 B2 JPH0339031 B2 JP H0339031B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- present
- molten metal
- hollow alumina
- 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
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000009970 fire resistant effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000011449 brick Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052851 sillimanite Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
本発明は軽量で断熱性を有し、然も容器内張お
よび鋳造ノズルの溶融金属等に接する個所でも耐
食性を有する耐火物に関するものである。
従来軽量断熱性を有する多気孔性耐火物は雰囲
気炉又はバツクライニングとして用いられ溶融金
属等に直接接する個所には浸透、耐食性面で不向
きであり使用されていなかつた。
これ等は多気孔性が特公54−6561号に見られる
ように化学反応によるガス発生、撹拌による起
泡々沫生成、分解による気体発生、溶融収縮、焼
失する物質のような気孔生成性物質による構造か
ら成るため第１図−イの如く従来の多孔性耐火物
は開口気孔であり、溶融金属等が浸透し易いこと
と、この様な多孔性の耐火物は一般的に強度が低
いという問題を有していた。
そこで発明者等は第１図−ロの如くほぼ密封気
孔に近い中空状アルミナの使用を試みた処、その
多孔性にもかかわらず予想に反して高耐用性を示
し本発明を成すに至つたもので、即ち中空状アル
ミナ５〜50重量％、残部が気孔生成性物質を含ま
ないその他耐火材料からなる配合組成物に水およ
び又は結合剤を添加して混練、成形後、乾燥焼成
又は加熱乾燥することを特徴とする溶融金属容器
内張および鋳造ノズル用中空アルミナ含有耐火物
の製造法を要旨とするものである。
本発明に使用する中空状アルミナは溶融法で製
造されて市販されているもので概略次のようなも
のでAl2O395％以上、比重0.5〜0.8、粒度0.1〜７
mm、密封気孔及び若干外気と通じた中空球状を成
すものである。その一例を第１表に示す。
Al2O3は耐食性等の観点より高いほど好まし
く、粒度は均一分散性、耐食性等使用効果上最大
粒３mm位が好ましい。
The present invention relates to a refractory that is lightweight, has heat insulating properties, and is corrosion resistant even in areas that come into contact with molten metal, such as container linings and casting nozzles. Conventionally, multi-porous refractories with lightweight heat insulation properties have been used in atmospheric furnaces or back linings, and have not been used in locations that come into direct contact with molten metal because of their penetration and corrosion resistance. These are porous substances such as gas generation due to chemical reactions, foaming and droplet generation due to stirring, gas generation due to decomposition, melting and shrinkage, and substances that burn out, as shown in Japanese Patent Publication No. 54-6561. Conventional porous refractories have a structure of I had a problem. Therefore, the inventors tried using hollow alumina with almost sealed pores as shown in Figure 1-B, and found that it had unexpectedly high durability despite its porosity, leading to the completion of the present invention. In other words, water and/or a binder is added to a blended composition consisting of 5 to 50% by weight of hollow alumina and the remainder is other refractory materials that do not contain pore-forming substances, kneaded, shaped, and then dried by baking or heat-dried. The gist of the present invention is a method for producing hollow alumina-containing refractories for lining molten metal containers and casting nozzles, which is characterized by: The hollow alumina used in the present invention is manufactured by a melting method and is commercially available, and is approximately as follows: Al 2 O 3 95% or more, specific gravity 0.5 to 0.8, particle size 0.1 to 7.
mm, it has a hollow spherical shape with sealed pores and a slight communication with the outside air. An example is shown in Table 1. The higher the Al 2 O 3 content is, the more preferable it is from the viewpoint of corrosion resistance, etc., and the maximum particle size is preferably about 3 mm from the viewpoint of uniform dispersibility, corrosion resistance, etc.
【表】
粒度については適宜調整して使用しても良い。
添加量については５〜50重量％が好ましく、５重
量％では軽量、断熱性面で添加効果が薄れて、50
重量％以上では強度、摩耗性、耐食性面で劣化を
来たす。
添加量と品質特性の関係を第２図に示す。
その他耐火材料としては、通常一般に使用され
るもので例えばロウ石、シヤモツト、ムライト、
シリマナイト、ボーキサイト、アルミナ、マグネ
シア、クローム鉱、マグクロ、カーボン、粘土、
炭化珪素等の一種又は二種以上から成るものであ
る。更に必要に応じてAl、Si等の金属粉を使用
して、不焼成品として製品化する場合には有機
系、無機系等の結合剤を使用する。次に製造法は
配合組成物に水および又は結合剤を添加して混練
後、プレス成形、振動鋳込成形、押出し成形等に
より成形して乾燥後焼成、或いは不焼成品の場合
は加熱乾燥により製造するものである。プレス成
形の場合は中空状アルミナの破壊しない成形圧を
用いる。
以下本発明の実施例につき説明する。
実施例 １
第２表にアルミナ質不焼成品の例を示し、その
配合組成および品質特性を示す。[Table] The particle size may be adjusted as appropriate.
The amount added is preferably 5 to 50% by weight, and if it is 5% by weight, the effect of addition in terms of lightness and heat insulation will be weakened,
If it exceeds % by weight, strength, abrasion resistance, and corrosion resistance deteriorate. Figure 2 shows the relationship between the amount added and quality characteristics. Other fire-resistant materials that are commonly used include waxite, siyamoto, mullite,
sillimanite, bauxite, alumina, magnesia, chromite, maguro, carbon, clay,
It is composed of one or more types of silicon carbide and the like. Furthermore, if necessary, metal powder such as Al or Si may be used, and if the product is to be manufactured as an unfired product, an organic or inorganic binder may be used. Next, the manufacturing method is to add water and/or a binder to the blended composition, knead it, mold it by press molding, vibration casting molding, extrusion molding, etc., dry it and then fire it, or in the case of an unfired product, heat dry it. It is manufactured. In the case of press molding, use a molding pressure that will not destroy the hollow alumina. Examples of the present invention will be described below. Example 1 Table 2 shows examples of alumina unfired products, and shows their composition and quality characteristics.
【表】
実施例 ２
第３表にアルミナ質焼成品の例を示しその配合
組成および品質特性を示す。[Table] Example 2 Table 3 shows examples of fired alumina products, and shows their compounding composition and quality characteristics.
【表】【table】
【表】【table】
【表】
次に本発明品を実用した例を述べると、実施例
１の本発明を250t取鍋上部ノズルとして使用し
たところ、口径拡大量、スポーリング等の問題は
なく従来品と同等の耐用が得られ、製品重量とし
て約20％減少し、取扱いが容易であつた。又断熱
効果による溶融金属流と接する表面の温度降下も
少ない為かアルミナ折出等も無く孔閉塞防止にも
効果がある。本発明品が多孔性にもかかわらず耐
用性が有る理由は中空状アルミナが高純度の電融
アルミナ殻によつて形成されているために極めて
高い耐食性材料であることと、これを包含するマ
トリツクスが強固に中空アルミナを包み込んで耐
食性組織を作り上げているものと考えられる。
さらに実施例２の本発明を溶融金属容器の内
張り耐火物として250T溶融鍋の内張りに第３図
の如く施工した場合、従来の高アルミナれんが内
張り鍋に対し、れんが寿命は同一であるも、溶鋼
温度ドロツプは第４図の如く５℃少なくなつた。
第３図イは溶融鍋の内張り説明図、第３図ロは本
発明を使用した溶融鍋の内張り説明図で、１は
殻、２はろう石質れんが、３は従来高アルミナ質
れんが、４は本発明品である。
本発明により、軽量かつ断熱性を有し、然も溶
融金属に接する個所でも優れた耐食性を有したも
のが得られ、れんが取扱い作業性向上、省エネル
ギー効果に寄与するものである。[Table] Next, we will describe an example in which the product of the present invention was put to practical use. When the present invention of Example 1 was used as the upper nozzle of a 250t ladle, there were no problems such as diameter expansion or spalling, and the durability was equivalent to that of the conventional product. was obtained, the product weight was reduced by about 20%, and it was easy to handle. Also, probably because the temperature drop on the surface in contact with the molten metal flow is small due to the heat insulating effect, there is no alumina precipitation, and it is effective in preventing pore clogging. The reason why the product of the present invention is durable despite its porosity is that the hollow alumina is formed from a high-purity fused alumina shell, making it an extremely corrosion-resistant material, and the matrix containing this material is extremely durable. It is thought that the alumina tightly surrounds the hollow alumina and creates a corrosion-resistant structure. Furthermore, when the present invention of Example 2 is applied to the lining of a 250T melting pot as a refractory lining for a molten metal container as shown in Fig. 3, the life of the brick is the same as that of a conventional high alumina brick lined pot, but the molten metal is The temperature drop decreased by 5°C as shown in Figure 4.
Figure 3A is an explanatory diagram of the lining of a melting pot, and Figure 3B is an explanatory diagram of the lining of a melting pot using the present invention, where 1 is a shell, 2 is a waxy stone brick, 3 is a conventional high alumina brick, and 4 is a product of the present invention. According to the present invention, it is possible to obtain a material that is lightweight and has heat insulating properties, and also has excellent corrosion resistance even in areas that come into contact with molten metal, contributing to improved brick handling workability and energy saving effects.
第１図イは従来の多孔性耐火物、第１図ロは中
空状アルミナの説明図、第２図は中空状アルミナ
の添加量と品質特性の関係図、第３図イは従来の
溶融鍋の内張り説明図、第３図ロは本発明耐火物
を使用した溶融鍋の内張り説明図、第４図は本発
明耐火物と従来耐火物を使用した場合の溶鋼温度
ドロツプの比較を示す図である。
Figure 1A is a conventional porous refractory, Figure 1B is an explanatory diagram of hollow alumina, Figure 2 is a relationship between the amount of hollow alumina added and its quality characteristics, and Figure 3A is a conventional melting pot. Figure 3 (b) is an illustration of the lining of a melting pot using the refractory of the present invention, and Figure 4 is a diagram showing a comparison of molten steel temperature drop when using the refractory of the present invention and a conventional refractory. be.
Claims (1)
成性物質を含まないその他耐火材料からなる配合
組成物に水および又は結合剤を添加して混練、成
形後、乾燥焼成又は加熱乾燥することを特徴とす
る溶融金属容器内張および鋳造ノズル用中空アル
ミナ含有耐火物の製造法。1. Water and/or a binder are added to a compounded composition consisting of 5 to 50% by weight of hollow alumina and the remainder is other fire-resistant material that does not contain pore-forming substances, kneaded, formed, and then dried by baking or heating. A method for producing hollow alumina-containing refractories for lining molten metal containers and casting nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22752682A JPS59121146A (en) | 1982-12-28 | 1982-12-28 | Hollow alumina-containing refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22752682A JPS59121146A (en) | 1982-12-28 | 1982-12-28 | Hollow alumina-containing refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59121146A JPS59121146A (en) | 1984-07-13 |
| JPH0339031B2 true JPH0339031B2 (en) | 1991-06-12 |
Family
ID=16862280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22752682A Granted JPS59121146A (en) | 1982-12-28 | 1982-12-28 | Hollow alumina-containing refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59121146A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059558A (en) * | 1988-06-22 | 1991-10-22 | North American Philips Corp., Signetics Division | Use of venting slots to improve hermetic seal for semiconductor dice housed in ceramic packages |
| GB9124403D0 (en) * | 1991-11-16 | 1992-01-08 | Foseco Int | Ceramic material |
| JP3101650B2 (en) | 1997-10-08 | 2000-10-23 | 明智セラミックス株式会社 | Nozzle for continuous casting |
| KR100367647B1 (en) * | 1999-04-05 | 2003-01-10 | 아케치세라믹스 가부시키가이샤 | A continuous casting nozzle for molten steel and manufacturing method thereof |
| WO2000061321A1 (en) * | 1999-04-09 | 2000-10-19 | Akechi Ceramics Kabushiki Kaisha | Continuous casting nozzle |
-
1982
- 1982-12-28 JP JP22752682A patent/JPS59121146A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59121146A (en) | 1984-07-13 |
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