JP5876235B2 - 軽量耐火骨材 - Google Patents
軽量耐火骨材 Download PDFInfo
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- JP5876235B2 JP5876235B2 JP2011128225A JP2011128225A JP5876235B2 JP 5876235 B2 JP5876235 B2 JP 5876235B2 JP 2011128225 A JP2011128225 A JP 2011128225A JP 2011128225 A JP2011128225 A JP 2011128225A JP 5876235 B2 JP5876235 B2 JP 5876235B2
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- 239000002245 particle Substances 0.000 claims description 91
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 58
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 30
- 230000005484 gravity Effects 0.000 claims description 26
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 23
- 239000002994 raw material Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 16
- 239000011819 refractory material Substances 0.000 description 10
- 238000009413 insulation Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000011449 brick Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/107—Refractories by fusion casting
- C04B35/109—Refractories by fusion casting containing zirconium oxide or zircon (ZrSiO4)
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/653—Processes involving a melting step
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
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- Structural Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
また、従来の軽量耐火骨材としては、シリカ系、ファイバー系が使用されているが、融点がそれぞれ1000℃、1500℃程度と耐熱性の点で必ずしも充分ではない。
これは、Al2O3成分及びZrO2成分を併用した効果であり、Al2O3成分単独で構成された耐火骨材よりも強度が高い。そのため、本発明の軽量耐火骨材で耐火物を構成した際に骨材が破損したりする等により、耐火物の形状や性能が変動することを抑制し、安定した耐火物とできる。
嵩比重は、体積既知の容器に0.1〜1.0mm粒子を軽く三回タップし充填し、擦りきり後の質量を測定して算出した。粒子の粒径を揃えた理由は、変動要素を軽減するためである。
例1〜3ではアルミナ原料のみを溶解した。結果としてアルミナ含有量は、99.4〜99.7質量%となり、0.1〜1.0mm粒子の嵩比重は、それぞれ0.9〜1.2g/cm3となった。嵩比重が、0.9〜1.2と一定にならなかった理由は、周囲の耐火物が溶解し、純度が低下したことが原因と考えられる。例4〜9ではジルコニア含有量を増大していったが、同様に多少の不純物に影響され嵩比重が変動していると考えられる。
次に例1〜9のサンプルについて常温(20℃)、500℃、1000℃の熱伝導率(W/(m・K))を測定した。熱伝導率の測定に用いた粒子は、0.1mm〜1.0mmの粒径を有するもので篩により分級したものを使用した。熱伝導率の測定には高温熱伝導率自動測定装置(スペインラボ社製、商品名:HWM−15)を用いた。
次に粒子の熱的安定性を確認するために、ジルコニアの転移温度である1100℃を前後する850℃〜1250℃を40回、100℃/hの昇降温速度で変動させ、粒子に発生する亀裂比率(個数基準)を顕微鏡で観察した。
亀裂が観察されない又は1%以下の粒子で亀裂が観察された場合:○、1%超10%以下の粒子で亀裂が観察された場合:△、10%超の粒子で亀裂が観察された場合:×として評価した。
体積一定の各粒子サンプルを直径50mmの金型内に20kg/cm2の圧力を掛けた場合の高さから体積圧縮率を求めて評価した。体積圧縮率が、3%未満を○、3%以上6%未満を△、6%以上を×として、評価(強度評価1)した。なお、中空粒子の強度を評価する場合には、同程度の空隙率で比較する必要がある。直接、測定できないので、理論比重=4.0×Al2O3量+5.6×ZrO2量と、上記嵩比重とから次の(1)式により算出した。
((理論比重−嵩比重)/理論比重))×100(%) …(1)
また、粒子中のZrO2含有量と体積圧縮率との関係を図3に示す。ZrO2を含有することにより、体積圧縮率が低下し、粒子の強度が高くなることが確認された。
粒径300μm〜600μmの粒子を約120〜150個準備し、その中で破砕粒子が何個あるかをカウントし、全体粒子で割って破砕粒子比率を算出して評価した。破砕粒子比率が、1%以下を○、1%超2%未満を△、2%以上を×として、評価(強度評価2)した。
Claims (4)
- Al2O3及びZrO2を必須成分とするアルミナ−ジルコニア質の耐火骨材であって、
Al2O3を67〜99質量%、ZrO2を1〜33質量%含有し、かつ、これらの合量が98質量%以上であり、嵩比重が0.5〜1.5である中空粒子からなることを特徴とする軽量耐火骨材。 - Al 2 O 3 及びZrO 2 を必須成分とするアルミナ−ジルコニア質の耐火骨材であって、
Al 2 O 3 を67〜99質量%、ZrO 2 を1〜33質量%含有し、かつ、これらの合量が96質量%以上であり、嵩比重が0.5〜0.97である中空粒子からなることを特徴とする軽量耐火骨材。 - 前記中空粒子の1000℃における熱伝導率が0.3〜0.6W/m・Kである請求項1又は2記載の軽量耐火骨材。
- 前記中空粒子の溶解温度が1700℃以上である請求項1乃至3のいずれか1項記載の軽量耐火骨材。
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JP2011128225A JP5876235B2 (ja) | 2010-06-09 | 2011-06-08 | 軽量耐火骨材 |
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JP2010131858 | 2010-06-09 | ||
JP2010131858 | 2010-06-09 | ||
JP2011128225A JP5876235B2 (ja) | 2010-06-09 | 2011-06-08 | 軽量耐火骨材 |
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JP2015115785A Division JP2015193535A (ja) | 2010-06-09 | 2015-06-08 | 軽量耐火骨材 |
Publications (2)
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JP2012017252A JP2012017252A (ja) | 2012-01-26 |
JP5876235B2 true JP5876235B2 (ja) | 2016-03-02 |
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JP2015115785A Withdrawn JP2015193535A (ja) | 2010-06-09 | 2015-06-08 | 軽量耐火骨材 |
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Country Status (3)
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EP (1) | EP2394972B1 (ja) |
JP (2) | JP5876235B2 (ja) |
CN (1) | CN102344290B (ja) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2055787B (en) * | 1979-08-01 | 1983-02-16 | Ass Cement Co | Closed cellular hollow refractory spheres |
JPS58135175A (ja) * | 1982-02-03 | 1983-08-11 | 日本特殊陶業株式会社 | β−アルミナ磁器を焼成する方法 |
JPH02277544A (ja) * | 1989-04-18 | 1990-11-14 | Shinagawa Refract Co Ltd | 耐火中空球の製造方法 |
JPH0339031A (ja) | 1989-07-04 | 1991-02-20 | Iwai Kikai Kogyo Kk | 魚の頭方向揃え装置 |
JPH0653626B2 (ja) * | 1990-09-12 | 1994-07-20 | 品川白煉瓦株式会社 | ジルコニア質複合耐火断熱材 |
JPH1192241A (ja) * | 1997-09-17 | 1999-04-06 | Sumitomo Metal Ind Ltd | 不定形耐火物 |
FR2810315B1 (fr) * | 2000-06-20 | 2002-08-16 | Produits Refractaires | Produits azs fondus et coules de cout reduit et leurs utilisations |
FR2832403B1 (fr) * | 2001-11-20 | 2004-07-23 | Saint Gobain Ct Recherches | Composition refractaire non faconnee, destinee notamment a la realisation de soles d'un four de verrerie |
FR2859203B1 (fr) * | 2003-09-01 | 2006-02-10 | Saint Gobain Ct Recherches | Piece crue destinee a la fabrication d'un produit refractaire fritte presentant un comportement au bullage ameliore |
CN1296312C (zh) * | 2005-05-13 | 2007-01-24 | 郑州豫兴氮氧结合耐火材料有限公司 | 一种锆刚玉质耐火球 |
DE102005032254B4 (de) * | 2005-07-11 | 2007-09-27 | Refractory Intellectual Property Gmbh & Co. Kg | Gebranntes, feuerfestes Zirkonprodukt |
WO2009072627A1 (ja) | 2007-12-06 | 2009-06-11 | Agc Ceramics Co., Ltd. | 耐火物粒子の製造方法 |
CN101215180B (zh) * | 2008-01-07 | 2010-09-01 | 侯松发 | 利用天然矿物原料生产azs电熔耐火材料的方法 |
JP5507262B2 (ja) * | 2008-01-22 | 2014-05-28 | Agcセラミックス株式会社 | 鋳型用骨材粒子 |
CN101219906A (zh) * | 2008-02-02 | 2008-07-16 | 柳州钢铁股份有限公司 | 锆刚玉莫来石质耐火球 |
JP5465396B2 (ja) | 2008-04-22 | 2014-04-09 | Agcセラミックス株式会社 | 低熱伝導性の断熱キャスタブル用粉体組成物 |
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2011
- 2011-06-08 JP JP2011128225A patent/JP5876235B2/ja active Active
- 2011-06-08 EP EP20110004681 patent/EP2394972B1/en active Active
- 2011-06-09 CN CN201110160769.6A patent/CN102344290B/zh active Active
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- 2015-06-08 JP JP2015115785A patent/JP2015193535A/ja not_active Withdrawn
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Publication number | Publication date |
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JP2015193535A (ja) | 2015-11-05 |
CN102344290B (zh) | 2014-05-07 |
EP2394972B1 (en) | 2013-08-21 |
EP2394972A1 (en) | 2011-12-14 |
JP2012017252A (ja) | 2012-01-26 |
CN102344290A (zh) | 2012-02-08 |
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