JP2019184175A - Heat resistant material - Google Patents
Heat resistant material Download PDFInfo
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- JP2019184175A JP2019184175A JP2018076796A JP2018076796A JP2019184175A JP 2019184175 A JP2019184175 A JP 2019184175A JP 2018076796 A JP2018076796 A JP 2018076796A JP 2018076796 A JP2018076796 A JP 2018076796A JP 2019184175 A JP2019184175 A JP 2019184175A
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Abstract
Description
この発明は、各種の窯業の用途、また炭化炉や燃焼炉などに使用できる耐熱材に関するものである。 The present invention relates to heat-resistant materials that can be used in various ceramic industries, carbonization furnaces, combustion furnaces, and the like.
従来、焼却残渣用溶融炉に関する提案があった（特許文献１）。
すなわち、焼却残渣用溶融炉として、アーク炉、プラズマ炉、プラズマアーク炉、抵抗炉、バーナ炉等が使用されている。そしてこれらの溶融炉においては、炉内に生成する溶融物に接面する炉側壁部に、Al2O3を主材とするAl2O3−SiC系耐火レンガを用いたものが提案されている。 一般に、焼却炉を含む焼却設備には年１回の定期補修期間が設定されているので、かかる焼却設備から発生する焼却残渣を溶融処理する溶融炉も、これに合わせて年１回の定期補修期間が設定し得るような耐用寿命を持てば、好都合である。しかし、前述した従来の焼却残渣用溶融炉は、それ程の耐用寿命を持たず、誠に都合が悪い。 この従来提案が解決しようとする課題は、従来の焼却残渣用溶融炉では、耐用寿命が短く或はまた築炉構造が不安定という点にあり、この課題を解決するため、焼却残渣を溶融処理する溶融炉において、炉内に生成する溶融物と接面する炉側壁部に、SiC含有量92重量％以上の高SiC系還元焼成耐火レンガを用いた。 この従来提案では、炉内に生成する溶融物と接面する炉側壁部に、SiC含有量92重量％以上の高SiC系還元焼成耐火レンガを用いる。SiC含有量92重量％以上の高SiC系還元焼成耐火レンガは、Al2O3含有量50％以上のAl2O3を主材とするAl2O3−SiC系耐火レンガよりも、アルカリ成分と反応を起こし難く、またMgO−Cr2O3系やAl2O3−Cr2O3系耐火レンガよりも、熱膨張率が小さい。炉内に生成する溶融物と接面する炉側壁部に、SiC含有量92重量％以上の高SiC系還元焼成耐火レンガを用いると、焼却残渣用溶融炉の耐用寿命が長くなり築炉構造が安定化する、というものである。
しかし、この従来のものでは築炉がし難いという問題があった。
Conventionally, there has been a proposal regarding a melting furnace for incineration residues (Patent Document 1).
That is, as an incineration residue melting furnace, an arc furnace, a plasma furnace, a plasma arc furnace, a resistance furnace, a burner furnace, or the like is used. And in these melting furnaces, those using Al 2 O 3 -SiC refractory bricks with Al 2 O 3 as the main material have been proposed for the furnace side walls facing the melt produced in the furnace. Yes. In general, a regular repair period is set for incinerators including incinerators once a year, so melting furnaces that melt incineration residues generated from such incinerators are also regularly repaired once a year. It is advantageous if it has a useful life such that the period can be set. However, the conventional incineration residue melting furnace described above does not have such a useful life and is inconveniently inconvenient. The problem to be solved by this conventional proposal is that the conventional incineration residue melting furnace has a short service life or the construction of the furnace is unstable. To solve this problem, the incineration residue is melted. In the melting furnace to be used, a high SiC-based reduced fired refractory brick having a SiC content of 92% by weight or more was used on the side wall of the furnace in contact with the melt generated in the furnace. In this conventional proposal, a high SiC-based reduced fired refractory brick having a SiC content of 92% by weight or more is used on the side wall of the furnace that contacts the melt produced in the furnace. High SiC-based reduced fired refractory bricks with SiC content of 92% by weight or more are more alkaline components than Al 2 O 3 -SiC refractory bricks with Al 2 O 3 content of 50% or more of Al 2 O 3 as the main material. The thermal expansion coefficient is smaller than that of MgO—Cr 2 O 3 and Al 2 O 3 —Cr 2 O 3 refractory bricks. If a high-SiC-based reduced fired refractory brick with a SiC content of 92% by weight or more is used on the side wall of the furnace that is in contact with the melt produced in the furnace, the service life of the melting furnace for incineration residues will be extended, and the construction structure will be It is to stabilize.
However, there is a problem that it is difficult to construct a furnace with this conventional one.
そこでこの発明は、従来よりも築炉がし易い耐熱材を提供しようとするものである。 Therefore, the present invention seeks to provide a heat-resistant material that is easier to construct than in the past.
前記課題を解決するためこの発明では次のような技術的手段を講じている。
（１）この発明の耐熱材は、耐熱面を有する炭化ケイ素の焼結体に抜け止め状の嵌合部が凹設され、前記嵌合部とその逆面側の接合面とが接合材により一体的に形成されたことを特徴とする。
この耐熱材は、耐熱面を有する炭化ケイ素の焼結体に抜け止め状の嵌合部（アンカー・錨・クサビ効果を有する窪み）が凹設されているので、耐熱面を有する炭化ケイ素の焼結体に対し接合材が抜けださない態様で一体化することが出来る。
また、嵌合部とその逆面側の接合面とが接合材により一体的に形成されたので、耐熱面が炭化ケイ素の焼結体により非常に耐熱性が高いと共に、接合面が接合材によって従来の耐熱煉瓦のような施工性を有する。
ここで、前記炭化ケイ素（SiC）の焼結体は、粉末炭化ケイ素の液状バインダー剤を砂型に流し込んで1,800〜2,000℃で焼結することにより得ることができ、1,500℃の耐熱性を有する。この耐熱面は、900〜1,100℃に昇温する炭化炉などの内面材として用いることが出来る。また、炭化ケイ素の焼結体は割れにくく、耐薬品性にも優れ、熱による寸法変化率が小さい。
粉末炭化ケイ素は、インゴットを微粉砕して得ることが出来る。粉末炭化ケイ素の焼結は、仮焼結と本焼結との二段階で行うことが出来る。
前記接合材として熱硬化型のキャスタブル、耐熱セメントなどを用いることができ、これを焼結体に抜け止め状の嵌合部に充填すると共に接合面に塗布し、これを乾燥することにより仕上げることが出来る。
前記焼結体の寸法は、例えば90mm×90mm×30〜40mmとすることが出来る。前記接合面の厚みは、例えば2mmとすることが出来る。
この耐熱材は、耐熱タイル、耐火材、耐熱ヒーターとして用いることが出来る。
In order to solve the above problems, the present invention takes the following technical means.
(1) In the heat-resistant material of the present invention, a silicon carbide sintered body having a heat-resistant surface is provided with a retaining-shaped fitting portion that is recessed, and the fitting portion and a bonding surface on the opposite side are formed by a bonding material. It is formed integrally.
In this heat-resistant material, a silicon carbide sintered body having a heat-resistant surface has recessed fitting portions (anchor, ridge, wedge-shaped depression), so that the silicon carbide having a heat-resistant surface is sintered. It is possible to integrate the bonded material so that the bonding material does not come out.
In addition, since the fitting portion and the joint surface on the opposite side are integrally formed by the joining material, the heat-resistant surface is very high heat resistance by the sintered body of silicon carbide, and the joint surface is made by the joining material. It has workability like a conventional heat-resistant brick.
Here, the sintered body of silicon carbide (SiC) can be obtained by pouring a liquid binder of powdered silicon carbide into a sand mold and sintering at 1,800 to 2,000 ° C., and has a heat resistance of 1,500 ° C. This heat-resistant surface can be used as an inner material of a carbonizing furnace that is heated to 900 to 1,100 ° C. Moreover, the sintered body of silicon carbide is hard to break, has excellent chemical resistance, and has a small dimensional change rate due to heat.
Powdered silicon carbide can be obtained by pulverizing an ingot. Sintering of powdered silicon carbide can be performed in two stages: pre-sintering and main sintering.
A thermosetting castable, heat-resistant cement, or the like can be used as the bonding material, and this is filled in a non-detachable fitting portion in the sintered body, applied to the bonding surface, and finished by drying. I can do it.
The size of the sintered body can be set to 90 mm × 90 mm × 30 to 40 mm, for example. The thickness of the joint surface can be set to 2 mm, for example.
This heat-resistant material can be used as a heat-resistant tile, a refractory material, and a heat-resistant heater.
（２）前記抜け止め状の嵌合部を断面が角張ったΩ状として帯状に凹設されているようにしてもよい。
このように、前記抜け止め状の嵌合部を断面が角張ったΩ状として帯状に凹設されているようにすると、比較的にシンプルな構造でアンカー・錨・クサビ効果を発揮することが出来る。
(2) The retainer-like fitting portion may be recessed in a band shape with an Ω-like cross section.
As described above, when the stopper-like fitting portion is recessed in the shape of an Ω having a square cross section, the anchor / wrinkle / wedge effect can be exhibited with a relatively simple structure. .
この発明は上述のような構成であり、次の効果を有する。
耐熱面が炭化ケイ素の焼結体により非常に耐熱性が高いと共に接合面が接合材によって従来の耐熱煉瓦のような施工性を有するので、従来よりも築炉がし易い耐熱材を提供することが出来る。
The present invention is configured as described above and has the following effects.
To provide a heat-resistant material that is easier to build than conventional ones because the heat-resistant surface is very heat-resistant due to the sintered body of silicon carbide and the joint surface is workable like a conventional heat-resistant brick due to the bonding material. I can do it.
以下、この発明の実施の形態を図面を参照して説明する。
図１及び２に示すように、この実施形態の耐熱材は、耐熱面１を有する炭化ケイ素の焼結体２に抜け止め状の嵌合部３（アンカー・錨・クサビ効果を有する窪み）が凹設され、前記嵌合部３とその逆面側の接合面４とが接合材５により一体的に形成されているようにした。
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the heat-resistant material of this embodiment has a silicon carbide sintered body 2 having a heat-resistant surface 1, and a fitting portion 3 (an anchor, ridge, wedge having a wedge effect) that is not slipped out. The fitting portion 3 and the joint surface 4 on the opposite surface side thereof are formed integrally with the joint material 5.
前記炭化ケイ素（SiC）の焼結体２は、粉末炭化ケイ素の液状バインダー剤を砂型に流し込んで1,800〜2,000℃で焼結することにより得た。これにより、1,500℃の耐熱性を有するものであった。また、炭化ケイ素の焼結体２は割れにくく、耐薬品性にも優れ、熱による寸法変化率が小さかった。 The silicon carbide (SiC) sintered body 2 was obtained by pouring a liquid binder of powdered silicon carbide into a sand mold and sintering at 1,800 to 2,000 ° C. Thereby, it had a heat resistance of 1,500 ° C. Moreover, the sintered body 2 of silicon carbide was hard to break, had excellent chemical resistance, and had a small dimensional change rate due to heat.
粉末炭化ケイ素は、インゴットを微粉砕して得た。粉末炭化ケイ素の焼結は、仮焼結と本焼結との二段階で行った。
前記接合材５として、キャスタブルを用い、これを焼結体２に抜け止め状の嵌合部３に充填すると共に接合面４に塗布し、これを乾燥することにより仕上げた。
Powdered silicon carbide was obtained by pulverizing an ingot. Sintering of powdered silicon carbide was performed in two stages: preliminary sintering and main sintering.
A castable was used as the bonding material 5, which was filled in the sintered body 2 in a retaining portion 3 in a retaining shape, applied to the bonding surface 4, and dried to finish.
前記焼結体２の寸法は、90mm×90mm×40mmに設定した。前記接合面４の厚みは、2mmに設定した。前記抜け止め状の嵌合部３を断面が角張ったΩ状として帯状に凹設されているようにした。
この耐熱材は、炭化炉の耐熱タイルとして築炉した。この耐熱面１は、900〜1,100℃に昇温する炭化炉の内面材として用いた。
The dimension of the sintered body 2 was set to 90 mm × 90 mm × 40 mm. The thickness of the joint surface 4 was set to 2 mm. The retainer-like fitting portion 3 is recessed in a band shape with an Ω-shaped cross section.
This heat-resistant material was constructed as a heat-resistant tile for a carbonization furnace. This heat-resistant surface 1 was used as an inner surface material of a carbonization furnace heated to 900 to 1,100 ° C.
次に、この実施形態の耐熱材の使用状態を説明する。
この耐熱材は、耐熱面１を有する炭化ケイ素の焼結体２に抜け止め状の嵌合部３が凹設されているので、耐熱面１を有する炭化ケイ素の焼結体２に対し接合材５が抜けださない態様で一体化することが出来た。
また、嵌合部３とその逆面側の接合面４とが接合材５により一体的に形成されたので、耐熱面１が炭化ケイ素の焼結体２により非常に耐熱性が高いと共に、接合面４が接合材５によって従来の耐熱煉瓦のような施工性を有し、従来よりも築炉がし易かった。
Next, the use state of the heat-resistant material of this embodiment will be described.
This heat-resistant material is provided with a silicon carbide sintered body 2 having a heat-resistant surface 1 and a recessed fitting portion 3 is recessed, so that the heat-resistant material is bonded to the silicon carbide sintered body 2 having the heat-resistant surface 1. It was possible to integrate in a manner that 5 did not come out.
Further, since the fitting portion 3 and the joint surface 4 on the opposite side are integrally formed by the joining material 5, the heat-resistant surface 1 is very high in heat resistance by the sintered body 2 of silicon carbide, and is joined. The surface 4 has the workability like a conventional heat-resistant brick by the bonding material 5, and it was easier to construct a furnace than before.
さらに、前記抜け止め状の嵌合部３を断面が角張ったΩ状として帯状に凹設されているようにしたので、比較的にシンプルな構造でアンカー・錨・クサビ効果を発揮することが出来た。 In addition, since the retaining part 3 having a retaining shape is recessed in the shape of an Ω having a square cross section, the anchor / wrinkle / wedge effect can be achieved with a relatively simple structure. It was.
従来よりも築炉がし易いことによって、種々の耐熱材の用途に適用することができる。 Since it is easier to build a furnace than before, it can be applied to various heat-resistant materials.
１ 耐熱面
２ 焼結体
３ 嵌合部
４ 接合面
５ 接合材
DESCRIPTION OF SYMBOLS 1 Heat-resistant surface 2 Sintered body 3 Fitting part 4 Joining surface 5 Joining material
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| Application Number | Priority Date | Filing Date | Title |
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| JP2018076796A JP2019184175A (en) | 2018-04-12 | 2018-04-12 | Heat resistant material |
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| JP2018076796A JP2019184175A (en) | 2018-04-12 | 2018-04-12 | Heat resistant material |
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| JP2019184175A true JP2019184175A (en) | 2019-10-24 |
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| JP2018076796A Pending JP2019184175A (en) | 2018-04-12 | 2018-04-12 | Heat resistant material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517003A (en) * | 1974-07-09 | 1976-01-21 | Kurosaki Refractories Co | |
| JPS60140089A (en) * | 1983-12-27 | 1985-07-24 | 住友金属工業株式会社 | Furnace wall structure |
| JPH11190593A (en) * | 1997-12-26 | 1999-07-13 | Kyocera Corp | Furnace material for high-temperature furnace |
| JP2000009388A (en) * | 1998-06-19 | 2000-01-14 | Shinagawa Refract Co Ltd | Melting furnace for incineration residue |
| WO2008099844A1 (en) * | 2007-02-14 | 2008-08-21 | Ngk Insulators, Ltd. | Joined body and process for producing the same |
| JP2013537585A (en) * | 2010-07-27 | 2013-10-03 | ポール ヴルス エス．エイ． | Improved hearth for metallurgical furnace with furnace wall lining |
-
2018
- 2018-04-12 JP JP2018076796A patent/JP2019184175A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517003A (en) * | 1974-07-09 | 1976-01-21 | Kurosaki Refractories Co | |
| JPS60140089A (en) * | 1983-12-27 | 1985-07-24 | 住友金属工業株式会社 | Furnace wall structure |
| JPH11190593A (en) * | 1997-12-26 | 1999-07-13 | Kyocera Corp | Furnace material for high-temperature furnace |
| JP2000009388A (en) * | 1998-06-19 | 2000-01-14 | Shinagawa Refract Co Ltd | Melting furnace for incineration residue |
| WO2008099844A1 (en) * | 2007-02-14 | 2008-08-21 | Ngk Insulators, Ltd. | Joined body and process for producing the same |
| JP2013537585A (en) * | 2010-07-27 | 2013-10-03 | ポール ヴルス エス．エイ． | Improved hearth for metallurgical furnace with furnace wall lining |
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