JPH01131083A - Sintered hollow material of ceramic - Google Patents
Sintered hollow material of ceramicInfo
- Publication number
- JPH01131083A JPH01131083A JP29014287A JP29014287A JPH01131083A JP H01131083 A JPH01131083 A JP H01131083A JP 29014287 A JP29014287 A JP 29014287A JP 29014287 A JP29014287 A JP 29014287A JP H01131083 A JPH01131083 A JP H01131083A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- hollow ceramic
- sintered hollow
- sintered body
- combustible 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 239000011796 hollow space material Substances 0.000 title 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000010304 firing Methods 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 229910010293 ceramic material Inorganic materials 0.000 abstract 2
- -1 etc. Chemical compound 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000011810 insulating material Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 241001024304 Mino Species 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
発明の目的
（産業上の利用分野）
本発明は製鉄分野における溶湯の保温材、建築分野にお
ける断熱材、遮音材等に使用される中空セラミック焼結
体に関するものである。[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to a hollow ceramic sintered body used as a heat insulating material for molten metal in the steel manufacturing field, a heat insulating material in the construction field, a sound insulating material, etc. .
（従来の技術）
従来、製鉄所において溶鉱炉からの溶湯をるつぼに入れ
、同るつぼから順次鋳型の中に溶湯を注入して鋳物が製
造されている。その際るつぼ中の溶湯が冷却しないよう
にるつぼに蓋をしたり、溶湯の表面にセラミック製の板
状体が載せられていた。(Prior Art) Conventionally, castings have been produced in ironworks by placing molten metal from a blast furnace into a crucible and sequentially injecting the molten metal into molds from the crucible. At that time, the crucible was covered with a lid to prevent the molten metal from cooling, and a ceramic plate was placed on the surface of the molten metal.
（発明が解決しようとする問題点）
上記従来のセラミック製板状体では、保温性が低いため
、溶湯の温度が比較的早く低下してしまうという問題点
があった。(Problems to be Solved by the Invention) The conventional ceramic plate-shaped body described above has a problem in that the temperature of the molten metal decreases relatively quickly because of its low heat retention.
本発明の目的は、上記問題点を解消し、保温性及び遮音
性の優れた中空セラミック焼結体を提供することにある
。An object of the present invention is to solve the above problems and provide a hollow ceramic sintered body with excellent heat retention and sound insulation properties.
発明の構成
（問題点を解決するための手段）
本発明は上記問題点を解決するために、可燃性材料の芯
の外周部に形成された未焼成セラミックを焼成するとい
う構成を採用している。Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention adopts a structure in which an unfired ceramic formed on the outer periphery of a core of combustible material is fired. .
（作用）
上記構成を採用したことにより、可燃性材料が焼成によ
って焼失するとともに、同可燃性材料の外周部に形成さ
れた未焼成セラミックが焼成され、強度及び耐久性の優
れた中空のセラミック焼結体が得られ、その内部に存在
する空気によって断熱性、遮音性等の特性が発揮される
。(Function) By adopting the above configuration, the flammable material is burned out by firing, and the unfired ceramic formed on the outer periphery of the combustible material is fired, creating a hollow ceramic sintered body with excellent strength and durability. A solid body is obtained, and the air present inside the body exhibits properties such as heat insulation and sound insulation.
（実施例）
以下に本発明を製鉄所の溶湯の保温材に具体化した一実
施例を第１〜３図に基づいて説明する。(Example) An example in which the present invention is applied to a heat insulating material for molten metal in a steelworks will be described below with reference to FIGS. 1 to 3.
第１図に示すように、本実施例における中空セラミック
焼結体１は、内部が直径６〜８ｍｍの中空部２となった
酸化マグネシウム（マグネシア）の焼結体からなる直径
１０〜１２開の球状体３である。この中空セラミック焼
結体１の大きさは使用目的によって適宜設定される。ま
た、この中空セラミック焼結体１の比重は０．５〜０．
６である。As shown in FIG. 1, the hollow ceramic sintered body 1 in this example is a sintered body of magnesium oxide (magnesia) with a diameter of 10 to 12 mm and a hollow part 2 of 6 to 8 mm in diameter. This is the spherical body 3. The size of the hollow ceramic sintered body 1 is appropriately set depending on the purpose of use. Further, the specific gravity of this hollow ceramic sintered body 1 is 0.5 to 0.
It is 6.
この中空セラミック焼結体１の製造方法について説明す
る。A method of manufacturing this hollow ceramic sintered body 1 will be explained.
まず、新聞紙等の屑紙を用意し、これに水と糊を加えて
混ぜ、ペースト状とする。この原料としては、焼成時に
ガスを発生せず、表面にはじく性質のない紙が好適であ
る。樹脂は焼成時にガスを発生したり、特殊な糊を必要
としたりするため好ましくない。また、繊維は球状に成
形しづらいため好ましくない。上記ペーストを肉挽機に
かけてペレット状に成形する。このベレットを回転機に
入れ、しばらく回転することにより直径約６１の球状体
が得られる。First, prepare scrap paper such as newspaper, add water and glue, and mix to make a paste. As this raw material, paper that does not generate gas during firing and has no surface repellency is suitable. Resin is not preferred because it generates gas during firing and requires special glue. Further, fibers are not preferred because they are difficult to form into a spherical shape. The above paste is passed through a meat grinder and formed into pellets. This pellet is placed in a rotating machine and rotated for a while to obtain a spherical body with a diameter of about 61 cm.
次に、この球状体の表面に２〜３１の厚さでマグネシア
の微粉末をまぶすと、第２図に示すように、内部に紙４
の芯が形成され、その外周部に未焼成セラミック５の層
が形成された球状体が得られる。上記未焼成セラミック
５としては、入手の容易性及び価格の点からマグネシア
が好適である。Next, when fine magnesia powder is sprinkled on the surface of this spherical body to a thickness of 2 to 31 mm, as shown in Figure 2, paper 4
A spherical body is obtained in which a core is formed and a layer of unfired ceramic 5 is formed on the outer periphery of the core. As the unfired ceramic 5, magnesia is suitable from the viewpoint of availability and price.
また、マグネシアを主体とし、少量のマグネシア以外の
物質が混合されていても、溶融温度が１３００°Ｃを超
えるものであればよい。前記未焼成セラミック５として
のマグネシアは、前記芯となる紙４が球状体であるため
、その球状体の表面全体に均一に付着しやすい。Further, even if the material is mainly composed of magnesia and a small amount of a substance other than magnesia is mixed, it is sufficient that the melting temperature exceeds 1300°C. Since the core paper 4 is a spherical body, magnesia as the unfired ceramic 5 tends to adhere uniformly to the entire surface of the spherical body.
続いて、これをマグネシア焼成用のロータリーキルンに
より、１４００℃で５〜６分焼成する。Subsequently, this is fired at 1400° C. for 5 to 6 minutes in a rotary kiln for firing magnesia.
このようにして、前記中空セラミック焼結体１が得られ
る。In this way, the hollow ceramic sintered body 1 is obtained.
次に、上記のようにして得られた中空セラミック焼結体
１を製鉄所における鉄の溶湯の保温材として使用した場
合について説明する。Next, a case will be described in which the hollow ceramic sintered body 1 obtained as described above is used as a heat insulating material for molten iron in a steelworks.
第３図に示すように、容器６内に満たされた鉄の溶湯り
に対し上記中空セラミック焼結体１を投入すると、同中
空セラミック焼結体１は前記のように比重が軽いので、
その表面に浮かんで層を形成する。As shown in FIG. 3, when the hollow ceramic sintered body 1 is put into the molten iron tank filled in the container 6, since the hollow ceramic sintered body 1 has a light specific gravity as described above,
It floats on the surface and forms a layer.
従って、溶湯りの熱は、その表面に形成された中空セラ
ミック焼結体１の層によって遮断されるので、溶湯りの
温度低下は非常に少ない。例えば、溶湯りの温度が１２
００〜１３００℃の場合、はぼその温度を約６時間維持
することができる。そして、前記容器６の下部から溶湯
りを必要量抜き出して鋳型の中に入れ、製品を製造する
ことができる。Therefore, the heat of the molten metal is blocked by the layer of the hollow ceramic sintered body 1 formed on the surface thereof, so that the temperature drop of the molten metal is very small. For example, if the temperature of the molten metal is 12
When the temperature is 00 to 1300°C, the temperature can be maintained for about 6 hours. Then, a required amount of molten metal is extracted from the lower part of the container 6 and put into a mold to manufacture a product.
上記のように本実施例の中空セラミック焼結体１は、高
温で十分に焼成されているので、落としても割れない程
度の強度及び耐久性の優れた球状体となり、その内部に
存在する空気によって断熱性、遮音性等の特性が発揮さ
れる。従って、製鉄所における溶湯りの保温材として有
用である。As mentioned above, the hollow ceramic sintered body 1 of the present example is sufficiently fired at high temperature, so it becomes a spherical body with excellent strength and durability to the extent that it will not break even if dropped. This provides properties such as heat insulation and sound insulation. Therefore, it is useful as a heat insulating material for molten metal in steel works.
本発明は上記実施例に限定されるものではなく、次のよ
うに構成することもできる。The present invention is not limited to the above embodiments, but can also be configured as follows.
（１）中空セラミック焼結体１の形状は、上記実施例で
は製造の容易性及びマグネシアの付着性等の点から球状
としたが、楕円形、四角形等の形状も可能である。(1) The shape of the hollow ceramic sintered body 1 is spherical in the above embodiment from the viewpoint of ease of manufacture and adhesion of magnesia, but other shapes such as an ellipse or a rectangle are also possible.
（２）未焼成セラミック５は、前記実施例ではマグネシ
アを使用したが、これ以外にアルミナ、シリカ等を使用
することもできる。(2) Magnesia was used as the unfired ceramic 5 in the above embodiment, but other materials such as alumina and silica may also be used.
（３）中空セラミック焼結体１の用途として、前記実施
例では製鉄所で使用する保温材をあげたが、それ以外に
建築材料としての断熱材、遮音材等があげられる。(3) In the above embodiment, the hollow ceramic sintered body 1 is used as a heat insulating material used in a steel mill, but it can also be used as a heat insulating material, a sound insulating material, etc. as a building material.
発明の効果
本発明の中空セラミック焼結体は、強度及び耐久性に優
れているとともに、保温性及び遮音性に優れているとい
う効果を奏する。Effects of the Invention The hollow ceramic sintered body of the present invention has excellent strength and durability, as well as excellent heat retention and sound insulation properties.
第１図は中空セラミック焼結体を示す断面図、第２図は
紙と未焼成セラミックとからなる球状体を示す断面図、
第３図は鉄の溶湯表面に中空セラミック焼結体を浮かべ
た状態を示す一部断面図である。
１・・・中空セラミック焼結体、４・・・芯としての紙
、５・・・未焼成セラミック
特許出願人 美濃セラミック株式会社FIG. 1 is a sectional view showing a hollow ceramic sintered body, FIG. 2 is a sectional view showing a spherical body made of paper and unfired ceramic,
FIG. 3 is a partial cross-sectional view showing a hollow ceramic sintered body floating on the surface of molten iron. 1...Hollow ceramic sintered body, 4...Paper as a core, 5...Unfired ceramic patent applicant Mino Ceramic Co., Ltd.
Claims (1)
セラミック（５）を焼成してなる中空セラミック焼結体
。 ２、未焼成セラミック（５）が酸化マグネシウムである
特許請求の範囲第１項に記載の中空セラミック焼結体。 ３、可燃性材料が紙である特許請求の範囲第１項に記載
の中空セラミック焼結体。[Claims] 1. A hollow ceramic sintered body formed by firing an unfired ceramic (5) formed on the outer periphery of a core (4) of a combustible material. 2. The hollow ceramic sintered body according to claim 1, wherein the unfired ceramic (5) is magnesium oxide. 3. The hollow ceramic sintered body according to claim 1, wherein the combustible material is paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29014287A JPH01131083A (en) | 1987-11-17 | 1987-11-17 | Sintered hollow material of ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29014287A JPH01131083A (en) | 1987-11-17 | 1987-11-17 | Sintered hollow material of ceramic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131083A true JPH01131083A (en) | 1989-05-23 |
| JPH0565471B1 JPH0565471B1 (en) | 1993-09-17 |
Family
ID=17752329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29014287A Pending JPH01131083A (en) | 1987-11-17 | 1987-11-17 | Sintered hollow material of ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01131083A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004269353A (en) * | 2003-03-04 | 2004-09-30 | Snecma Propulsion Solide | Method of manufacturing porous component from ceramic matrix composite material |
| DE19917874B4 (en) * | 1998-04-20 | 2005-03-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Thermal insulation for insertion between structures to be insulated |
| JP2008075895A (en) * | 2006-09-19 | 2008-04-03 | Showa Denko Kk | Heat exchanger |
| JP2014141371A (en) * | 2013-01-23 | 2014-08-07 | Agc Ceramics Co Ltd | Thick-skinned hollow ceramic particles and method for manufacturing the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945773A (en) * | 1972-09-04 | 1974-05-01 | Seiko Instr & Electronics | Denkidokei no hatsuteikiko |
| JPS4954414A (en) * | 1972-05-04 | 1974-05-27 | ||
| JPS55109258A (en) * | 1979-02-10 | 1980-08-22 | Kautsuzu Refurakutoriizu Ltd | Improved refractory composition |
| JPS58164705A (en) * | 1982-03-24 | 1983-09-29 | Nippon Telegr & Teleph Corp <Ntt> | Production of porous metal or ceramic |
| JPS63149306A (en) * | 1986-11-27 | 1988-06-22 | ノルトドイッチェ・アフィネリー・アクチエンゲゼルシャフト | Production of hollow sphere enhanced in its wall strength and composite thereof |
-
1987
- 1987-11-17 JP JP29014287A patent/JPH01131083A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4954414A (en) * | 1972-05-04 | 1974-05-27 | ||
| JPS4945773A (en) * | 1972-09-04 | 1974-05-01 | Seiko Instr & Electronics | Denkidokei no hatsuteikiko |
| JPS55109258A (en) * | 1979-02-10 | 1980-08-22 | Kautsuzu Refurakutoriizu Ltd | Improved refractory composition |
| JPS58164705A (en) * | 1982-03-24 | 1983-09-29 | Nippon Telegr & Teleph Corp <Ntt> | Production of porous metal or ceramic |
| JPS63149306A (en) * | 1986-11-27 | 1988-06-22 | ノルトドイッチェ・アフィネリー・アクチエンゲゼルシャフト | Production of hollow sphere enhanced in its wall strength and composite thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19917874B4 (en) * | 1998-04-20 | 2005-03-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Thermal insulation for insertion between structures to be insulated |
| JP2004269353A (en) * | 2003-03-04 | 2004-09-30 | Snecma Propulsion Solide | Method of manufacturing porous component from ceramic matrix composite material |
| JP2008075895A (en) * | 2006-09-19 | 2008-04-03 | Showa Denko Kk | Heat exchanger |
| JP2014141371A (en) * | 2013-01-23 | 2014-08-07 | Agc Ceramics Co Ltd | Thick-skinned hollow ceramic particles and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0565471B1 (en) | 1993-09-17 |
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