JPH0772671B2 - Zirconia lining structure for high temperature furnace - Google Patents
Zirconia lining structure for high temperature furnaceInfo
- Publication number
- JPH0772671B2 JPH0772671B2 JP2188354A JP18835490A JPH0772671B2 JP H0772671 B2 JPH0772671 B2 JP H0772671B2 JP 2188354 A JP2188354 A JP 2188354A JP 18835490 A JP18835490 A JP 18835490A JP H0772671 B2 JPH0772671 B2 JP H0772671B2
- Authority
- JP
- Japan
- Prior art keywords
- zirconia
- side member
- surface side
- heat
- receiving surface
- 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
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 title claims description 152
- 239000000835 fiber Substances 0.000 claims description 38
- 239000000843 powder Substances 0.000 claims description 20
- 230000005484 gravity Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 description 13
- 239000011230 binding agent Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 239000011094 fiberboard Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000009740 moulding (composite fabrication) Methods 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000003754 zirconium Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000715 Mucilage Polymers 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021343 molybdenum disilicide Inorganic materials 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- -1 oxides Y 2 O 3 Chemical compound 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- XJUNLJFOHNHSAR-UHFFFAOYSA-J zirconium(4+);dicarbonate Chemical compound [Zr+4].[O-]C([O-])=O.[O-]C([O-])=O XJUNLJFOHNHSAR-UHFFFAOYSA-J 0.000 description 1
- HAIMOVORXAUUQK-UHFFFAOYSA-J zirconium(iv) hydroxide Chemical class [OH-].[OH-].[OH-].[OH-].[Zr+4] HAIMOVORXAUUQK-UHFFFAOYSA-J 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は高温炉の耐火ライニング構造、より詳細に
は、断面形状において同一であるジルコニア成形体を互
に嵌合して一体平板状に組合わせて接合面からの熱リー
クを防止しうるようにしたジルコニア質ライニング構造
に関する。Description: TECHNICAL FIELD The present invention relates to a refractory lining structure for a high-temperature furnace, and more specifically, zirconia compacts having the same sectional shape are fitted to each other to be assembled into an integral flat plate. The present invention also relates to a zirconia-based lining structure capable of preventing heat leakage from the joint surface.
ジルコニアZrO2は、約2715℃という高融点をもち、熱伝
導性が非常に低く、高温において低い電気抵抗度を、低
温において高い電気抵抗度を有し、化学的安定性に優れ
て塩基性及び酸性鉱滓に濡れず、揮発性が低く、更にモ
ース硬度が７以上であることなど他のセラミックスにな
い優れた特性を有している。Zirconia ZrO 2 has a high melting point of about 2715 ° C., has very low thermal conductivity, low electrical resistance at high temperatures, and high electrical resistance at low temperatures, and has excellent chemical stability and basicity. It does not get wet with acidic slag, has low volatility, and has a Mohs hardness of 7 or more, which are excellent properties not found in other ceramics.
これらの特性を活かしてジルコニアが研磨、研削材、電
子材料、陶磁器用顔料、ガラス添加剤、センサー用材料
などの用途の他、耐火成形物に使用されている。Utilizing these properties, zirconia is used for polishing, abrasives, electronic materials, pigments for ceramics, glass additives, materials for sensors, etc., as well as fire-resistant molded products.
一般に高温用の電気炉では最近省エネルギーの見地から
Al2O3質ファイバーボードが使われているが、その耐熱
温度は通常1700℃であり1800℃を越えるような場合は塩
基性煉瓦やジルコニア煉瓦を使わざるを得ない。これら
の煉瓦は炉の熱容量を大きくし、昇温に多くのエネルギ
ーを必要とし、また熱スポーリングに弱く、急激な昇降
温は不可能である。またジルコニアファイバーボードで
はジルコニア本来の熱間クリープ性のために撓み易くあ
まり長尺物の天井板はむずかしい。また、従来のライニ
ング材形状は短冊状の部材の組合わせからなるもので、
各部材の接合面からの熱リークが生じやすかった。Generally, in the electric furnace for high temperature, from the viewpoint of energy saving recently
Al 2 O 3 fiberboard is used, but its heat-resistant temperature is usually 1700 ° C. If it exceeds 1800 ° C, basic bricks or zirconia bricks must be used. These bricks increase the heat capacity of the furnace, require a large amount of energy to raise the temperature, and are vulnerable to heat spalling, and cannot rapidly raise or lower the temperature. Further, the zirconia fiber board is liable to bend due to the inherent hot creep property of zirconia, and the ceiling plate of a long object is difficult. In addition, the conventional lining material shape consists of a combination of strip-shaped members,
Heat leakage from the joint surface of each member was likely to occur.
かくて本発明は1800℃を越える高温で使用でき煉瓦のよ
うな大きな熱容量をもたず、かつ熱スポーリングに強
く、熱リークを防止できる断熱性ライニング構造を提供
することを目的とするものである。Thus, the present invention has an object to provide a heat insulating lining structure which can be used at a high temperature exceeding 1800 ° C., does not have a large heat capacity like bricks, is resistant to heat spalling, and can prevent heat leakage. is there.
本発明者は先にジルコニアファイバー成形体とジルコニ
ア質複合耐火物について特許出願した（特開昭62−2607
80号公報と同63−297267号公報）が、そこで得られたジ
ルコニア質材料を改良して用いることによって上記目的
を良好に達成し得ることを見出して本発明に至ったもの
である。The present inventor previously applied for a patent for a zirconia fiber molded body and a zirconia-based composite refractory (Japanese Patent Laid-Open No. 62-2607).
No. 80 and No. 63-297267) have found that the above object can be satisfactorily achieved by improving and using the zirconia-based material obtained there, and arrived at the present invention.
かくして本発明は、ジルコニア質の受熱面側部材とジル
コニア質の背面側部材とからなり、該受熱面側部材と該
背面側部材が配列方向において同一の断面形状を有し、
該受熱面側部材と該背面側部材を交互に向き合わせて嵌
合させ一体平板状に組合わせてなり、前記受熱面側部材
はジルコニア粉末とジルコニアファイバーとから構成さ
れ、その嵩比重が3.0〜5.5である高密度部材からなり、
前記背面側部材はジルコニアファイバー、またはジルコ
ニアファイバーとジルコニア粉末とから構成され、その
嵩比重が1.0〜4.5である低密度部材からなり高温炉用ジ
ルコニア質ライニング構造を提供するものである。Thus, the present invention comprises a zirconia-based heat-receiving surface-side member and a zirconia-based back-side member, the heat-receiving surface-side member and the back-side member having the same cross-sectional shape in the arrangement direction,
The heat receiving surface side member and the back surface side member are alternately faced to each other and fitted together to form a flat plate, and the heat receiving surface side member is composed of zirconia powder and zirconia fiber, and has a bulk specific gravity of 3.0 to It consists of 5.5 high density material,
The back side member is a zirconia lining structure for a high temperature furnace, which is composed of zirconia fiber or a low density member composed of zirconia fiber and zirconia powder and having a bulk specific gravity of 1.0 to 4.5.
以下、本発明について詳しく説明する。 Hereinafter, the present invention will be described in detail.
本発明のライニング構造は互に同一の断面形状を有し嵌
合して一体平板状に組合わせうるジルコニア質受熱面側
部材とジルコニア質背面側部材とからなるものであり、
その受熱面側部材としては通常高密度部材が用いられ
る。その高密度部材としてはジルコニアファイバーとジ
ルコニア粉末とから構成され、その嵩比重が3.0〜5.5の
範囲のものを用いるのが好ましい。The lining structure of the present invention is composed of a zirconia-based heat receiving surface-side member and a zirconia-based back surface-side member that have the same cross-sectional shape and can be fitted together to be combined in a flat plate shape.
As the heat receiving surface side member, a high density member is usually used. The high-density member is preferably composed of zirconia fiber and zirconia powder and has a bulk specific gravity in the range of 3.0 to 5.5.
ジルコニアファイバーとしては純ジルコニアファイバー
の外に各種安定化剤で安定化されたジルコニアファイバ
ー、たとえばライム安定化ジルコニアファイバー、マグ
ネシア添加ジルコニアファイバー、イットリア安定化ジ
ルコニアファイバーなどを用いることができる。この中
ではイットリア安定化ジルコニアファイバーが好んで用
いられる。その繊維長及び繊維径は各々たとえば0.1〜5
0mmと0.1〜2.0μｍの範囲のものである。As the zirconia fiber, in addition to pure zirconia fiber, zirconia fiber stabilized with various stabilizers such as lime-stabilized zirconia fiber, magnesia-added zirconia fiber, and yttria-stabilized zirconia fiber can be used. Of these, yttria-stabilized zirconia fibers are preferably used. The fiber length and fiber diameter are, for example, 0.1 to 5 respectively.
It is in the range of 0 mm and 0.1 to 2.0 μm.
このジルコニアファイバーは、種々の方法により製造す
ることができ、たとえばジルコニウム塩の水溶液を出発
原料（紡糸液）としてこれを繊維化して、繊維前駆体
（プリカーサー）を形成し、繊維前駆体を高温で焼成し
て製造することができ、ジルコニア耐火物の用途、形状
などに応じて適宜選択することができる。This zirconia fiber can be produced by various methods. For example, an aqueous solution of a zirconium salt is used as a starting material (spinning solution) to be fiberized to form a fiber precursor (precursor), and the fiber precursor is heated at a high temperature. It can be produced by firing, and can be appropriately selected depending on the application, shape, etc. of the zirconia refractory.
ジルコニア粉末は化学式ZrO2を有する酸化ジルコニウム
から本質的になるものであり、この他目的に応じて炭酸
ジルコニウム、水酸化ジルコニウム化合物やそれらに酸
化物Y2O3、MgO、CaOなどの安定化材を添加したものも含
まれる。このジルコニア粉末の粒度は特に制限されない
が、通常0.1〜1000μｍ、好ましくは0.5〜５μｍの範囲
のものが用いられ、一定粒度のもののみを用いてもよ
く、また粗いものと細かいものなど別異の粒度のものを
混合して用いることもできる。Zirconia powder consists essentially of zirconium oxide having the chemical formula ZrO 2, and zirconium carbonate, zirconium hydroxide compounds and stabilizers such as oxides Y 2 O 3 , MgO and CaO depending on other purposes. It also includes those to which is added. Although the particle size of the zirconia powder is not particularly limited, it is usually in the range of 0.1 to 1000 μm, preferably 0.5 to 5 μm, only particles having a constant particle size may be used, and coarse particles and fine particles are different. It is also possible to mix and use particles having a particle size.
ジルコニアファイバーとジルコニア粉末の混合割合はジ
ルコニア粉末100重量部に対しジルコニアファイバーを
５〜200重量部、好ましくは10〜100重量部の範囲であ
る。The mixing ratio of the zirconia fiber and the zirconia powder is in the range of 5 to 200 parts by weight, preferably 10 to 100 parts by weight, based on 100 parts by weight of the zirconia powder.
これら両者の外に各種添加剤、たとえばバインダー、多
孔化剤、界面活性剤、分散剤、凝集剤を添加することが
できる。バインダーとして、例えばポリエチレンオキシ
ド等の合成高分子、メチルセルロース等のセルロース誘
導体、デンプンまたはその誘導体、ペクチンなどの動植
物性粘質物の外にジルコニアゾル、ジルコニウム塩水溶
液を用いることができる。このジルコニアゾルとジルコ
ニウム塩水溶液はジルコニアファイバーとジルコニア粉
末合計量100重量部に対して２〜30重量部の範囲用いる
のが好ましい。In addition to these, various additives such as a binder, a porosifying agent, a surfactant, a dispersant, and an aggregating agent can be added. As the binder, for example, synthetic polymers such as polyethylene oxide, cellulose derivatives such as methyl cellulose, starch or its derivatives, animal and plant mucilages such as pectin, and zirconia sol and zirconium salt aqueous solution can be used. This zirconia sol and zirconium salt aqueous solution are preferably used in the range of 2 to 30 parts by weight based on 100 parts by weight of the total amount of zirconia fiber and zirconia powder.
また多孔化剤は成形物の軽量化をはかるためで、たとえ
ば発泡スチロールビーズなどの有機球や各種繊維が上記
合計量100重量部に対して５〜100重量部用いることがで
きる。The porosifying agent is used to reduce the weight of the molded product, and for example, organic spheres such as expanded polystyrene beads and various fibers can be used in an amount of 5 to 100 parts by weight per 100 parts by weight of the above total amount.
このように、ジルコニアファイバーとジルコニア粉末に
必要に応じて加える各種添加剤を加えよく混練したのち
適宜形状に成形し、焼成する。その形状については後で
説明するが、成形には鋳込み、一方向プレス、アイソス
タチックプレス、押出しなどの各種方法を用いることが
できるが、オーガーマシンによる押出し成形が能率的で
ある。焼成温度は1800〜2200℃が好ましく、1800℃未満
では使用時変形を生じ、2200℃を越えると、過焼結とな
り焼成時の変形を生じ易くなる。As described above, various additives to be added to the zirconia fiber and the zirconia powder are added as needed, and the mixture is well kneaded, then shaped into an appropriate shape and fired. Although its shape will be described later, various methods such as casting, unidirectional pressing, isostatic pressing, and extrusion can be used for molding, but extrusion molding by an auger machine is efficient. The firing temperature is preferably 1800 to 2200 ° C. If it is less than 1800 ° C, deformation occurs during use, and if it exceeds 2200 ° C, oversintering tends to occur and deformation during firing tends to occur.
高密度部材は自身の重さや上部ライニング材の荷重に耐
え、特に熱間のクリープ変形を実用上問題のない範囲に
抑制させるためにある程度の密度が必要である。発明者
等は種々の実験より本材としては嵩比重3.0〜5.5g/cm3
の複合材が適することを見きわめた。The high-density member withstands its own weight and the load of the upper lining material, and in particular, needs to have a certain density in order to suppress hot creep deformation within a range where there is no practical problem. From various experiments, the inventors have found that this material has a bulk specific gravity of 3.0 to 5.5 g / cm 3
It has been found that the composite material of is suitable.
次に、本発明のライニング構造の背面側部材としては通
常低密度部材が用いられるが、本発明のライニング構造
の低密度部材としては、ジルコニアファイバー、又はジ
ルコニアファイバーとジルコニア粉末とから構成され、
その嵩比重が1.0〜4.5の範囲のものを用いる。Next, a low density member is usually used as the back side member of the lining structure of the present invention, but the low density member of the lining structure of the present invention is composed of zirconia fiber, or zirconia fiber and zirconia powder,
The one whose bulk specific gravity is in the range of 1.0 to 4.5 is used.
ジルコニアファイバーから構成されるジルコニアファイ
バーボードは通常上述のようなジルコニアファイバーと
その結晶安定化剤または加熱によりこの結晶安定化剤に
なる前駆体からなる結合剤を水やアルコール等に懸濁せ
しめ、その懸濁液から抄造成形して板状成形体を形成
し、乾燥し、焼成してつくられる。Zirconia fiber board composed of zirconia fiber is usually suspended in a binder such as the above-mentioned zirconia fiber and its crystal stabilizer or a precursor which becomes this crystal stabilizer by heating in water or alcohol, It is produced by forming a plate-like molded body from a suspension by paper-forming, drying and firing.
その結合剤はマグネシウム、イットリウム、カルシウ
ム、サマリウム、カドミウム、ランタン、及びネオジム
の酸化物、炭酸塩、塩基性炭酸塩、酢酸塩、シュウ酸
塩、硝酸塩、塩化物、及び硫酸塩から選ばれた少なくと
も１種の結晶安定化剤またはその前駆体である。その結
合剤は、通常0.1μｍ〜0.3mmの粒度をもっている。結合
剤の添加量は、ジルコニアファイバー100重量部に対し
て酸化物換算で１〜30重量部、好ましくは４〜10重量部
である。The binder is at least selected from oxides, carbonates, basic carbonates, acetates, oxalates, nitrates, chlorides and sulphates of magnesium, yttrium, calcium, samarium, cadmium, lanthanum and neodymium. One type of crystal stabilizer or its precursor. The binder usually has a particle size of 0.1 μm to 0.3 mm. The addition amount of the binder is 1 to 30 parts by weight, preferably 4 to 10 parts by weight in terms of oxide based on 100 parts by weight of zirconia fiber.
ジルコニアファイバー及び結合剤以外に、必要に応じて
種々の添加剤を含めることができる。例えば、アルミ
ナ、ジルコニア、シリカなどの通常の耐火物粉末を添加
して複合材とすることができるとともに、最終製品の成
形体に各種の性能を付与するために種々の補助材を添加
しうる。In addition to the zirconia fiber and the binder, various additives can be included as required. For example, ordinary refractory powders such as alumina, zirconia, and silica can be added to form a composite material, and various auxiliary materials can be added to impart various properties to the molded product of the final product.
抄造成形以外にも、目的とする最終製品の形態に応じて
種々の手法によって実施することができる。In addition to the paper forming and molding, various methods can be used depending on the form of the final product to be manufactured.
焼成温度は、添加する結合剤の金属塩や金属酸化物の種
類によって適宜変更することが望ましい。例えば、その
温度は1000〜1500℃である。焼成温度に加熱し、所定時
間維持して、ジルコニアファイバー成形体を得る。It is desirable to appropriately change the firing temperature depending on the kind of the metal salt or metal oxide of the binder to be added. For example, the temperature is 1000-1500 ° C. It is heated to the firing temperature and maintained for a predetermined time to obtain a zirconia fiber molded body.
または低密度部材は、上述のジルコニアファイバーとジ
ルコニア粉末とから構成される複合体において、軽量化
材を増量して低密度化したものである。具体的には、上
述の多孔化剤をジルコニアファイバーとジルコニア粉末
合計量100重量部に対して５〜100重量部用いることがで
きる。Alternatively, the low-density member is a composite of the above-mentioned zirconia fiber and zirconia powder, in which the weight-reducing material is increased to reduce the density. Specifically, the above-mentioned porosifying agent can be used in an amount of 5 to 100 parts by weight based on 100 parts by weight of the total amount of zirconia fiber and zirconia powder.
これらの低密度部材の嵩比重は1.0〜4.5の範囲である。
嵩比重が1.0未満では、使用時収縮が大きく、反り変形
が起き易い。一方、4.5を越える場合には、断熱性不
良、蓄熱量大となり、急昇温炉用ライニング材として不
適となる。The bulk specific gravity of these low density members is in the range of 1.0 to 4.5.
When the bulk specific gravity is less than 1.0, the shrinkage during use is large and the warp deformation is likely to occur. On the other hand, when it exceeds 4.5, the heat insulation becomes poor and the heat storage amount becomes large, so that it becomes unsuitable as a lining material for a rapid heating furnace.
本発明のライニング構造はジルコニア質の受熱面側部材
と背面側部材として上述のジルコニア質の高密度部材と
ジルコニア質の低密度部材とを組合わせてなる複合体で
ある。すなわち、受熱面側部材と背面側部材が同一断面
形状を有し、該受熱面側部材と該背面側部材を交互に向
き合わせて嵌合させ一体平板状に組合わせてなるもので
ある。その組合わせの数例を示せば第１図〜第７図に示
すような組合わせが挙げられる（各図中、下方を受熱面
側、上方を背面側とする）が、これらに限定されるもの
ではない。第８図は断面長方形をなす従来例のライニン
グ材を短冊状に配列した状態を示している。The lining structure of the present invention is a composite body formed by combining the zirconia-based heat-receiving surface-side member and the back-side member with the above-described zirconia-based high-density member and zirconia-based low-density member. That is, the heat receiving surface side member and the back surface side member have the same cross-sectional shape, and the heat receiving surface side member and the back surface side member are alternately faced to each other and fitted to each other to be combined into an integral flat plate shape. Some examples of the combinations are shown in FIGS. 1 to 7 (in each figure, the lower side is the heat receiving surface side, and the upper side is the rear surface side), but the combinations are limited to these. Not a thing. FIG. 8 shows a state in which conventional lining materials having a rectangular cross section are arranged in a strip shape.
以下各図について順次説明する。まず第１図には、配列
方向の断面が「工」の字状で同一形状の受熱面側部材１
と背面側部材２を交互に向き合わせて嵌合させ一体平板
状に組合わせたライニング構造を示す。ここで配列方向
とは、図中で左右の方向をいう。The respective figures will be sequentially described below. First, in FIG. 1, the heat receiving surface side member 1 having the same shape with the cross section in the arrangement direction being the shape of "K"
2 shows a lining structure in which the back side member 2 and the back side member 2 are alternately faced and fitted to each other to be combined into a flat plate. Here, the arrangement direction means the left and right directions in the drawing.
第２図（ａ）、（ｂ）は第１図に示した各部材をさらに
詳しく説明する分解斜視図で、第２図（ａ）において
「工」字形の断面を有する受熱面側部材１は下方長辺状
の受熱部３と上方短辺状の係合部４とそれぞれをその中
央部で垂直方向に結ぶ接続部５とからなり、一方第２図
（ｂ）において逆「工」字形の断面の背面側部材２は上
方長辺状の背面部６と下方短辺状の係合部７とそれぞれ
を中央部で垂直方向に結ぶ接続部８とからなる。受熱部
３と背面部６、部材１の係合部４と部材２の係合部７、
部材１の接続部５と部材２の接続部８とは夫々互に同一
の寸法を有しており、部材１と部材２は全体に同一の寸
法形状を有するようにつくられている。しかも部材１の
接続部５において形成される凹部９に部材２の係合部７
が嵌合され、部材２の接続部８において形成される凹部
10において部材１の係合部４が嵌合されるようにつくら
れている。FIGS. 2 (a) and 2 (b) are exploded perspective views for explaining the respective members shown in FIG. 1 in more detail. In FIG. 2 (a), the heat receiving surface side member 1 having a “shaped” cross section is It is composed of a lower long-sided heat receiving part 3, an upper short-sided engaging part 4 and a connecting part 5 which connects each of them in the vertical direction at the central part thereof, and on the other hand, in FIG. The back side member 2 of the cross section includes a back side portion 6 having an upper long side, an engagement portion 7 having a lower short side, and a connecting portion 8 connecting each of them in a vertical direction at a central portion. The heat receiving portion 3 and the back surface portion 6, the engaging portion 4 of the member 1 and the engaging portion 7 of the member 2,
The connecting portion 5 of the member 1 and the connecting portion 8 of the member 2 each have the same size, and the member 1 and the member 2 are made to have the same size and shape as a whole. Moreover, the engaging portion 7 of the member 2 is inserted into the recess 9 formed in the connecting portion 5 of the member 1.
And the recess formed in the connection portion 8 of the member 2
At 10 the engagement portion 4 of the member 1 is made to fit.
両部材はこのように形成されているので、つぎつぎと受
熱面側部材１と背面側部材２とが交互に対向して嵌合さ
れて一体平板状に組合わすことができる。Since both members are formed in this way, the heat-receiving surface side member 1 and the back surface side member 2 can be alternately opposed to each other and fitted together to form an integrated flat plate.
なお、部材１と部材２は互に嵌合できる範囲で互に一部
寸法を変えることができる。たとえば図に示したものは
受熱部３と背面部６とが同一形状で同じ厚さ（図中の上
下方向）のものを示してあるが、その厚さを適宜変える
ことができる。The members 1 and 2 can be partially changed in size so long as they can be fitted to each other. For example, although the heat receiving portion 3 and the back surface portion 6 have the same shape and the same thickness (vertical direction in the drawing) shown in the drawing, the thickness can be appropriately changed.
第３図は受熱面側部材１の受熱部３と係合部４の水平方
向の辺（但し受熱面を成す辺を除く）にある角度のテー
パー11をつけ係合部４を略六角形状に形成し、背面側部
材２をこれと対応するような寸法形状に形成した例を示
すものである。又第４図は上記第３図のテーパー11の方
向をそれと反対の方向12とした形状をなし、係合部４は
あたかも蝶がはねを拡げた如き形状をなしている例を示
している。FIG. 3 shows that the heat receiving portion 3 of the heat receiving surface side member 1 and the engaging portion 4 have a substantially hexagonal shape by attaching a taper 11 at an angle on the horizontal side (excluding the side forming the heat receiving surface). It shows an example in which the back side member 2 is formed into a size and shape corresponding to this. Further, FIG. 4 shows an example in which the direction of the taper 11 in FIG. 3 is set to the opposite direction 12 and the engaging portion 4 is shaped as if the butterfly spreads its spring. .
第５図は受熱面側部材１と背面側部材２が断面凸の字状
乃至はＴの字状のものを、第６図は第５図の凸の字状の
ものを２つ並べた形状のものを、第７図は断面凹の字状
のものを、それぞれ示す。これら第３図〜第７図に示し
たものも、第１図および第２図において説明したよう
に、受熱面側部材１と背面側部材２とを交互に向き合わ
せて嵌合させ一体平板状に組合わされる。FIG. 5 shows a heat receiving surface side member 1 and a back surface side member 2 having a convex or T-shaped cross section, and FIG. 6 shows a shape in which two convex characters shown in FIG. 5 are arranged side by side. FIG. 7 shows a concave shape in cross section. As shown in FIGS. 3 to 7, the heat receiving surface side member 1 and the back surface side member 2 are alternately opposed to each other and fitted into each other as shown in FIGS. Be combined with.
第１図〜第７図に示すような組合わせによれば、受熱面
側部材と背面側部材の接合面は第８図に示すように短冊
状に組合わされた従来のものとは異なり単純な平面では
ないので、接合面に沿って起こる熱リークを小さく押え
ることができる。また、受熱面側の接合面からリークし
た熱は断熱性の良好な背面側部材に接して熱の伝導が妨
げられるため背面側への熱の伝導を小さく押さえること
ができる。According to the combination shown in FIG. 1 to FIG. 7, the joint surface of the heat receiving surface side member and the back surface side member is simple unlike the conventional one which is combined in a strip shape as shown in FIG. Since it is not a flat surface, the heat leak that occurs along the joint surface can be suppressed small. Further, the heat leaked from the joint surface on the heat receiving surface side comes into contact with the back-side member having a good heat insulating property to hinder the heat conduction, so that the heat conduction to the back side can be suppressed small.
ジルコニア質高密度部材は蓄熱量が多くかつ断熱性に劣
るが、撓み変形し難い。一方、ジルコニア質低密度部材
は断熱性は良好であるが、撓み変形し易い。このような
撓み変形し易いが断熱性の良い低密度部材と断熱性に劣
るが撓み変形し難い高密度部材とを、受熱面側には高密
度部材を、背面側に低密度部材を組合わせ複合化するこ
とにより、両部材の欠点が相殺され利点を併せ持つ、す
なわち、断熱性が良好であって撓み変形し難く、しかも
熱リークを防止できるライニング構造を得ることができ
る。各部材の形状は断面形状において縦長とすると撓み
変形を軽減させることができるので好ましい。A high-density zirconia-based material has a large amount of heat storage and is poor in heat insulation, but is difficult to be flexibly deformed. On the other hand, the zirconia-based low density member has good heat insulating properties, but is easily bent and deformed. Such a low-density member that is easily deformed flexibly but has good heat insulation property and a high-density member that is poor in heat insulation property but is not easily deformed flexibly are combined with a high-density member on the heat receiving surface side and a low-density member on the back surface side. By combining them, it is possible to obtain a lining structure that offsets the defects of both members and has an advantage, that is, has good heat insulating properties, is difficult to be flexibly deformed, and can prevent heat leakage. It is preferable that the shape of each member is vertically long in the cross-sectional shape because flexural deformation can be reduced.
以下に実施例と比較例と、それらについて試験を行って
得られた結果を示す。勿論、本発明がこの実施例に限定
されるものではない。Hereinafter, Examples and Comparative Examples and the results obtained by conducting tests on them will be shown. Of course, the present invention is not limited to this embodiment.
実施例１ （ａ）受熱面側部材（高密度部材） 平均径１〜0.3mmのイットリア安定化ジルコニア粉末（Y
2O3 ７％、ZrO2 93％）50重量部、−0.3m/mのイット
リア安定化ジルコニア粉末50重量部、平均径５μ、平均
長20〜30m/mのイットリア安定化ジルコニアファイバー
（品川白煉瓦社製）100重量部、メチルセルロース５重
量部、水70重量部を添加配合し、押出し成形機にて第１
図受熱面側部材１の如き断面形状に成形した。受熱部の
長さと厚みは夫々30mm、10mm、係合部の長さと厚みは夫
々20mm、10mm、接続部の長さと幅は夫々10mm、10mmであ
った。また、部材１の奥行は250mmであった。成形後100
℃にて２時間乾燥後、1800℃で焼成した。得られた焼成
品の嵩比重は3.5であった。Example 1 (a) Heat receiving surface side member (high density member) Yttria-stabilized zirconia powder having an average diameter of 1 to 0.3 mm (Y
2 O 3 7%, ZrO 2 93%) 50 parts by weight, −0.3 m / m yttria-stabilized zirconia powder 50 parts by weight, average diameter 5 μ, average length 20-30 m / m yttria-stabilized zirconia fiber (Shinagawa White Brick Co., Ltd.) 100 parts by weight, 5 parts by weight of methyl cellulose, 70 parts by weight of water were added and blended, and the mixture was extruded using an extruder.
The heat-receiving surface side member 1 was molded into a cross-sectional shape. The length and thickness of the heat receiving portion were 30 mm and 10 mm, the length and thickness of the engaging portion were 20 mm and 10 mm, and the length and width of the connecting portion were 10 mm and 10 mm, respectively. The depth of the member 1 was 250 mm. 100 after molding
After drying at ℃ for 2 hours, it was baked at 1800 ℃. The bulk specific gravity of the obtained baked product was 3.5.
（ｂ）背面側部材（低密度部材） 前記特開昭62−260780号公報の実施例１に従ってジルコ
ニアファイバーボードを製造した。すなわち、平均径５
μｍ、平均長20〜30μｍのジルコニア100％ファイバー
（品川白煉瓦社製）100重量部に対し、平均粒度１〜５
μｍの炭酸マグネシウム粉末10重量部を媒液である水に
添加して抄造用懸濁液を調製した。この懸濁液から抄造
成形して板状成形体を形成した。成形後100℃で24時間
乾燥し、次いで1600℃で焼成して嵩比重1.5のジルコニ
アファイバーボードを製造し、上記受熱面側部材と対応
する形状、寸法を有する背面側部材に加工した。(B) Back Side Member (Low Density Member) A zirconia fiber board was manufactured according to Example 1 of JP-A-62-260780. That is, average diameter 5
An average particle size of 1 to 5 per 100 parts by weight of 100% zirconia fiber (manufactured by Shinagawa White Brick Co., Ltd.) having an average length of 20 to 30 μm.
A suspension for papermaking was prepared by adding 10 parts by weight of magnesium carbonate powder of μm to water as a liquid medium. Paper-forming was performed from this suspension to form a plate-shaped molded body. After molding, it was dried at 100 ° C. for 24 hours and then baked at 1600 ° C. to produce a zirconia fiber board having a bulk specific gravity of 1.5, and processed into a back side member having a shape and dimensions corresponding to those of the heat receiving surface side member.
（ｃ）これらの高密度部材及び低密度部材を互に第１図
の如く嵌合し一体平板状に組合わせた。(C) These high-density member and low-density member were fitted together as shown in FIG.
これらを炉内の温度が1800℃の電気炉（発熱体：二珪化
モリブデン）及び2000℃の電気炉（発熱体：品川白煉瓦
社製ジルコニア発熱体）内壁にライニングしその耐用性
を調査し、結果を第１表に示した。These were lined on the inner wall of the electric furnace (heating element: molybdenum disilicide) with a temperature of 1800 ° C and the electric furnace (heating element: zirconia heating element made by Shinagawa Shirobrick Co., Ltd.) with a temperature of 1800 ° C, and their durability was investigated. The results are shown in Table 1.
比較例１ 材質として実施例１の（ａ）（高密度部材、嵩比重3.
5）又は（ｂ）（低密度部材、嵩比重1.5）を第８図の如
く短冊状に施工し（各部材の形状20×40×250mm）、実
施例１におけると同一の条件でその耐用性を比較した。
結果を第１表に示した。Comparative Example 1 As a material, (a) of Example 1 (high density member, bulk specific gravity 3.
5) or (b) (low density member, bulk specific gravity 1.5) was applied in a strip shape as shown in FIG. 8 (shape of each member 20 × 40 × 250 mm), and its durability under the same conditions as in Example 1 Were compared.
The results are shown in Table 1.
なお、耐熱リーク性の比較は、それぞれ実施例１及び比
較例１のライニング構造の背面側接合部（図中のＡ及び
Ｂ部）における温度を比較することにより行った。In addition, the comparison of the heat-resistant leak resistance was performed by comparing the temperatures at the back side joints (A and B in the figure) of the lining structures of Example 1 and Comparative Example 1, respectively.
尚、実施例１に示す材料を用いて第３図〜第７図に示す
形状のライニング構造をつくり同様なテストを行なった
ところほぼ同様な結果が得られた。 When a lining structure having the shape shown in FIGS. 3 to 7 was made using the material shown in Example 1 and a similar test was conducted, almost the same result was obtained.
本発明によれば、受熱面側部材と背面側部材が配列方向
において同一の断面形状を有し、該受熱面側部材と背面
側部材を交互に向き合わせて嵌合させ一体状に組合せた
ので、熱リーク防止効果の大きいライニング構造を得る
ことができる。According to the present invention, the heat receiving surface side member and the back surface side member have the same cross-sectional shape in the arrangement direction, and the heat receiving surface side member and the back surface side member are alternately faced and fitted together, so that they are integrally combined. It is possible to obtain a lining structure having a great effect of preventing heat leakage.
また、本発明のライニング構造は、特にライニング構造
の受熱面側にはジルコニア粉末とジルコニアファイバー
とから構成された高密度部材を、背面側にはジルコニア
ファイバー、またはジルコニアファイバーとジルコニア
粉末とから構成された高密度部材を組合せて一体化した
ので、断熱性が良好であって撓み変形し難く、高温炉の
天井板に用いてもよく長期の使用に耐え高温炉用ライニ
ング構造として好適に使用することができる。Further, the lining structure of the present invention, in particular, the heat-receiving surface side of the lining structure is a high-density member composed of zirconia powder and zirconia fiber, the back side is composed of zirconia fiber, or zirconia fiber and zirconia powder. Since it is integrated by combining high-density members, it has good heat insulation and is not easily deformed by bending. It can be used as the ceiling plate of a high-temperature furnace and can withstand long-term use, and is suitable for use as a lining structure for high-temperature furnaces You can
第１図は本発明のライニング構造の実施例の断面を示す
斜視図、第２図（ａ）、（ｂ）は第１図に示したライニ
ング構造の各部材を説明する分解斜視図、第３図〜第７
図は本発明のライニング構造の他の実施例の断面を示す
斜視図、第８図は比較例のライニング構造の断面を示す
斜視図である。 １……受熱面側部材、２……背面側部材、Ａ、Ｂ……背
面側接合部。FIG. 1 is a perspective view showing a cross section of an embodiment of the lining structure of the present invention, and FIGS. 2 (a) and 2 (b) are exploded perspective views showing respective members of the lining structure shown in FIG. 1, and FIG. Figure-7
FIG. 8 is a perspective view showing a cross section of another embodiment of the lining structure of the present invention, and FIG. 8 is a perspective view showing a cross section of the lining structure of the comparative example. 1 ... Heat receiving surface side member, 2 ... Back side member, A, B ... Back side joint.
Claims (1)
質の背面側部材とからなり、該受熱面側部材と該背面側
部材が配列方向において同一の断面形状を有し、該受熱
面側部材と該背面側部材を交互に向き合わせて嵌合させ
一体平板状に組合わせてなり、前記受熱面側部材はジル
コニア粉末とジルコニアファイバーとから構成され、そ
の嵩比重が3.0〜5.5である高密度部材からなり、前記背
面側部材はジルコニアファイバー、またはジルコニアフ
ァイバーとジルコニア粉末とから構成され、その嵩比重
が1.0〜4.5である低密度部材からなる高温炉用ジルコニ
ア質ライニング構造。1. A heat receiving surface side member made of zirconia and a back surface side member made of zirconia, wherein the heat receiving surface side member and the back surface side member have the same cross-sectional shape in the arrangement direction, and the heat receiving surface side member. And the back side member are alternately faced to each other and fitted together to form a flat plate, and the heat receiving side member is composed of zirconia powder and zirconia fiber, and has a bulk density of 3.0 to 5.5. A zirconia-based lining structure for a high-temperature furnace, which is made of a low density member having a bulk specific gravity of 1.0 to 4.5, which is made of a zirconia fiber or zirconia fiber and zirconia powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2188354A JPH0772671B2 (en) | 1990-07-17 | 1990-07-17 | Zirconia lining structure for high temperature furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2188354A JPH0772671B2 (en) | 1990-07-17 | 1990-07-17 | Zirconia lining structure for high temperature furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0476387A JPH0476387A (en) | 1992-03-11 |
| JPH0772671B2 true JPH0772671B2 (en) | 1995-08-02 |
Family
ID=16222162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2188354A Expired - Lifetime JPH0772671B2 (en) | 1990-07-17 | 1990-07-17 | Zirconia lining structure for high temperature furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0772671B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2568954Y2 (en) * | 1993-05-17 | 1998-04-22 | ニチアス株式会社 | Inorganic fiber block for furnace wall |
| DE102005011789B3 (en) * | 2005-03-11 | 2006-11-02 | Plibrico Gmbh | Refractory plate and method for its production |
| CN121204812A (en) * | 2025-11-25 | 2025-12-26 | 森一量子科技(厦门)有限公司 | A method for thermal field control in Czochralski growth of oxide crystals |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511502A (en) * | 1974-06-27 | 1976-01-08 | Nippon Yakin Kogyo Co Ltd | KANETSUROTOYOTA IKABUTSU |
| JPS58135697U (en) * | 1982-03-10 | 1983-09-12 | 東芝セラミツクス株式会社 | furnace wall |
| JPH0252163A (en) * | 1988-08-12 | 1990-02-21 | Sumitomo Metal Ind Ltd | Method and apparatus for constructing lining refractory |
-
1990
- 1990-07-17 JP JP2188354A patent/JPH0772671B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0476387A (en) | 1992-03-11 |
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