JPH0848574A - Alumina-chrome-zirconia refractory and its production - Google Patents
Alumina-chrome-zirconia refractory and its productionInfo
- Publication number
- JPH0848574A JPH0848574A JP6184761A JP18476194A JPH0848574A JP H0848574 A JPH0848574 A JP H0848574A JP 6184761 A JP6184761 A JP 6184761A JP 18476194 A JP18476194 A JP 18476194A JP H0848574 A JPH0848574 A JP H0848574A
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- weight
- alumina
- content
- zirconia
- chromium
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- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、灰溶融炉、即ちごみ及
び汚泥焼却炉から発生する２次廃棄物の溶融処理炉の内
張り材として好適なアルミナ・クロム・ジルコニア質耐
火物及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alumina / chromium / zirconia refractory suitable as an lining material for an ash melting furnace, that is, a melting treatment furnace for secondary waste generated from a refuse and sludge incinerator, and a method for producing the same. It is about.
【０００２】[0002]
【従来の技術】従来の水処理汚泥の溶融炉として、例え
ば特公平５−54010号公報には、Ｃｒ2Ｏ3２５〜８０重
量％のほか、Ａｌ2Ｏ3またはＡｌ2Ｏ3とＺｒＯ2を１０
重量％以上含有し、上記以外の成分が２０重量％以下で
ある耐火材からなるものが開示されている。しかし、こ
の溶融炉においては、酸化クロムの含量が２５〜８０重
量％と広範にわたり、実質上酸化クロムの配合量の低減
ついては検討されていない。2. Description of the Related Art As a conventional melting furnace for water treatment sludge, for example, Japanese Patent Publication No. 5-54010 discloses that in addition to 25 to 80% by weight of Cr 2 O 3 , Al 2 O 3 or Al 2 O 3 and ZrO 2 are used. 10
It discloses a refractory material containing at least 20% by weight and other components at 20% by weight or less. However, in this melting furnace, the content of chromium oxide is as wide as 25 to 80% by weight, and reduction of the compounding amount of chromium oxide has not been examined.
【０００３】また、特開平１−192761号公報には、(ａ)
３２〜４２重量％ＺｒＯ2、１２〜１６.５重量％ＳｉＯ
2、４５〜４９.５重量％Ａｌ2Ｏ3、１〜３重量％Ｎａ2
Ｏ、及び７重量％までの他の種成分からなる４０〜８５
重量％溶製ＡＺＳ粒と、(ｂ)１５〜６０重量％の、反
応性アルミナ及び反応性アルミナ及び酸化クロムの組
合せから成る群から選択される成分とから実質成る耐火
組成物であって、この場合反応性アルミナが耐火組成物
の１０〜２０重量％の量において存在し、そして酸化ク
ロムが、耐火組成物の０〜４５重量％の量で存在する耐
火物品製造用耐火組成物が開示されている。Further, Japanese Patent Laid-Open No. 1-192761 discloses (a)
32 to 42% by weight ZrO 2 , 12 to 16.5% by weight SiO
2, from 45 to 49.5 wt% Al 2 O 3, 1 to 3 wt% Na 2
40-85 consisting of O and up to 7% by weight of other seed components
A refractory composition consisting essentially of wt% melted AZS particles and (b) 15-60 wt% of a component selected from the group consisting of reactive alumina and a combination of reactive alumina and chromium oxide. Disclosed is a refractory composition for making refractory articles wherein the reactive alumina is present in an amount of 10 to 20% by weight of the refractory composition and the chromium oxide is present in an amount of 0 to 45% by weight of the refractory composition. There is.
【０００４】更に、特開平２−38361号公報には、約１
５〜９０重量％の溶成クロム−アルミナ粒子、５〜２５
重量％の酸化クロム(III)、３０重量％未満のジルコニ
ア含有粒子及び残分がアルミナから本質的になる混合物
を圧縮し、焼成することにより製造されるクロム−アル
ミナ耐火れんがが開示されている。Further, Japanese Patent Application Laid-Open No. 2-38361 discloses that about 1
5 to 90% by weight of fused chromium-alumina particles, 5 to 25
A chromium-alumina refractory brick is disclosed which is produced by compressing and calcining a mixture consisting essentially of chromium (III) oxide by weight, less than 30% by weight of zirconia-containing particles and a balance of alumina.
【０００５】また、特開平４−132656号公報には、酸化
アルミニウム４０重量％以上と、酸化クロム６０重量％
以下と、酸化チタニウム及び／または滑石(３ＭｇＯ・
４ＳｉＯ2・Ｈ2Ｏ)を１.５重量％以下含むセラミックマ
トリックス中に第２相を分散してなるセラミック焼結体
において、セラミックマトリックスが制御された詳細な
クラックを含み、分散する第２相が前記セラミックマト
リックス形成物と未安定ジルコニアとの均一な凝集体で
あるアルミナ−クロミア焼結体が開示されている。Japanese Patent Application Laid-Open No. 4-132656 discloses that aluminum oxide is 40% by weight or more and chromium oxide is 60% by weight.
The following and titanium oxide and / or talc (3MgO.
In a ceramic sintered body obtained by dispersing a second phase in a ceramic matrix containing 1.5% by weight or less of (4SiO 2 · H 2 O), the second phase in which the ceramic matrix contains detailed controlled cracks and is dispersed Discloses an alumina-chromia sintered body that is a uniform aggregate of the ceramic matrix-forming product and the unstable zirconia.
【０００６】更に、特開平６−122546号公報には、酸化
アルミニウム７５〜９４重量％、酸化クロム５〜１５重
量％、ジルコニア１〜１０重量％の成形体を焼成してな
るカーボンブラック製造炉用のアルミナ−クロミナ−ジ
ルコニア質耐火物が開示されている。この耐火物は酸化
クロムの配合量が５〜１５重量％と少ないものの、その
用途は上述の如くカーボンブラックの製造炉用であり、
このものの灰溶融炉への適用は開示されていない。Further, Japanese Patent Application Laid-Open No. 6-122546 discloses a carbon black manufacturing furnace for firing a molded body of aluminum oxide 75 to 94% by weight, chromium oxide 5 to 15% by weight, and zirconia 1 to 10% by weight. Of alumina-chromina-zirconia refractory. Although this refractory has a low content of chromium oxide of 5 to 15% by weight, it is used for a carbon black production furnace as described above.
The application of this product to an ash melting furnace is not disclosed.
【０００７】[0007]
【発明が解決しようとする課題】現在、灰溶融炉では、
下水汚泥ケーキのみならず、都市ごみ等の焼却灰、飛灰
の他、シレッダーダスト、乾電池等多種にわたるものが
溶融されており、また、塩基度の高い灰もある。例えば
高クロム含量のアルミナ・クロム・ジルコニア質耐火物
は耐食性には優れるが、(１)変質層(浸潤層)の生成が多
い；(２)温度変化に対して割れ易い等の欠点があり、長
期間使用に際しては変質層からの剥離を生じ、従来の灰
溶融炉に使用されているアルミナ・クロム質耐火物、ク
ロム質耐火物と大差がない。At present, in ash melting furnaces,
Not only sewage sludge cakes, but also incinerator ash and fly ash of municipal solid waste, shredder dust, dry batteries, and many other types are melted, and there is also ash with high basicity. For example, alumina-chromium-zirconia refractory having a high chromium content is excellent in corrosion resistance, but (1) deteriorated layer (infiltrated layer) is often generated; (2) there are drawbacks such as easy cracking due to temperature change, When it is used for a long period of time, it peels from the deteriorated layer and is not much different from the alumina-chromium refractory and chrome refractory used in conventional ash melting furnaces.
【０００８】即ち、ごみ及び汚泥焼却炉から発生する２
次廃棄物の溶融処理炉等の灰溶融炉の炉材に使用するた
めのアルミナ・クロム・ジルコニア質耐火物の酸化クロ
ム配合量の低減については何ら考慮されていないのが現
状である。That is, 2 generated from refuse and sludge incinerators
At present, no consideration is given to reducing the amount of chromium oxide in the alumina, chromium, and zirconia refractories for use in furnace materials for ash melting furnaces such as those for the melting of secondary waste.
【０００９】従って、本発明の目的は、灰溶融炉におい
て、従来の高クロム含量のアルミナ・クロム・ジルコニ
ア質耐火物に比較して耐浸潤性、耐割れ性、耐食性が改
善され、かつ構造的スポリーリングにも優れたアルミナ
・クロム・ジルコニア質耐火物及びその製造方法を提供
することにある。Therefore, an object of the present invention is to improve infiltration resistance, crack resistance and corrosion resistance in an ash melting furnace as compared with the conventional high chromium content alumina / chromium / zirconia refractory material and to improve the structural resistance. An object of the present invention is to provide an alumina / chromium / zirconia refractory material excellent in splaying and a manufacturing method thereof.
【００１０】[0010]
【課題を解決するための手段】即ち、本発明の灰溶融炉
用アルミナ・クロム・ジルコニア質耐火物は、Ａｌ2Ｏ3
含量９９.０重量％以上で、粒度０.０４４〜５ｍｍのア
ルミナ原料３０〜７５重量％、Ａｌ2Ｏ3含量９９.０重
量％以上で、粒度０.０３ｍｍ以下の仮焼アルミナ１０
〜２０重量％、Ｃｒ2Ｏ3含量９０重量％以上で、粒度
０.０３〜３ｍｍのクロム原料５〜２０重量％、及び粒
度１ｍｍ以下のジルコニア原料１０〜３０重量％を含有
してなり、１６５０℃以上の温度範囲で超高温焼成して
得られたものであることを特徴とする。That is, the alumina-chromium-zirconia refractory for an ash melting furnace of the present invention is made of Al 2 O 3
Content 99.0% by weight or more, alumina raw material 30-75 wt% of the particle size 0.044~5mm, Al 2 O 3 in an amount 99.0% by weight or more, a particle size 0.03mm following calcined alumina 10
20 wt%, with Cr 2 O 3 content of 90 wt% or more, and also contains chromium material 5 to 20 wt% of the particle size 0.03 to 3 mm, and 10 to 30% by weight of zirconia starting material particle size 1 mm, 1650 It is characterized by being obtained by firing at an ultra-high temperature in a temperature range of not less than ° C.
【００１１】更に、本発明の灰溶融炉用アルミナ・クロ
ム・ジルコニア質耐火物の製造方法は、Ａｌ2Ｏ3含量９
９.０重量％以上で、粒度０.０４４〜５ｍｍのアルミナ
原料３０〜７０重量％、Ａｌ2Ｏ3含量９９.０重量％以
上で、粒度０.０３ｍｍ以下の仮焼アルミナ１０〜２０
重量％、Ｃｒ2Ｏ3含量９０重量％以上で、粒度０.０３
〜３ｍｍのクロム原料５〜２０重量％、及び粒度１ｍｍ
以下のジルコニア原料１０〜３０重量％を含有してなる
原料混合物に所定量のバインダーを添加、混練した後、
常法により成形し、１６５０℃以上の温度範囲で超高温
焼成することを特徴とする。Further, the method for producing an alumina / chromium / zirconia refractory for an ash melting furnace according to the present invention has an Al 2 O 3 content of 9
10 to 20% by weight of alumina raw material having a particle size of 0.044 to 5 mm and an Al 2 O 3 content of 99.0% by weight or more and a particle size of 0.03 mm or less at a content of 9.0% by weight or more.
% By weight, a Cr 2 O 3 content of 90% by weight or more, and a particle size of 0.03.
5 to 20% by weight of chromium raw material of ~ 3 mm, and grain size of 1 mm
After adding a predetermined amount of a binder to a raw material mixture containing the following zirconia raw material of 10 to 30% by weight and kneading,
It is characterized by being molded by a conventional method and firing at an extremely high temperature in a temperature range of 1650 ° C. or more.
【００１２】[0012]
【作用】本発明に使用するアルミナ原料は、Ａｌ2Ｏ3含
量が９９.０重量％以上の高純度品例えば電融アルミ
ナ、焼結アルミナ等であり、その粒度は０.０４４〜５
ｍｍ、好ましくは０.４４〜３ｍｍの範囲内のものであ
る。アルミナ原料のＡｌ2Ｏ3含量が９９.０重量％未満
であると耐侵食性低下のため好ましくない。また、粒度
が０.０４４ｍｍ未満であると耐スポーリング性低下の
ため好ましくなく、また、５ｍｍを超えると耐食性低下
のため好ましくない。なお、アルミナ原料の添加配合量
は、３０〜７５重量％、好ましくは４０〜７０重量％の
範囲内である。該配合量が３０重量％未満であると組織
が悪く、耐浸潤性が低下するために好ましくなく、ま
た、７５重量％を超えると耐食性低下のために好ましく
ない。The alumina raw material used in the present invention is a high-purity product having an Al 2 O 3 content of 99.0% by weight or more, such as fused alumina or sintered alumina, and its particle size is 0.044-5.
mm, preferably 0.44 to 3 mm. If the Al 2 O 3 content of the alumina raw material is less than 99.0% by weight, it is not preferable because the erosion resistance is reduced. Further, if the particle size is less than 0.044 mm, the spalling resistance is lowered, which is not preferable, and if it exceeds 5 mm, the corrosion resistance is lowered, which is not preferable. The amount of the alumina material added is in the range of 30 to 75% by weight, preferably 40 to 70% by weight. If the amount is less than 30% by weight, the structure is poor, and the infiltration resistance is unfavorably reduced. If it exceeds 75% by weight, the corrosion resistance is undesirably reduced.
【００１３】また、本発明に使用する仮焼アルミナは、
Ａｌ2Ｏ3含量が９９.０重量％以上の高純度品であり、
かつ粒度０.０３ｍｍ以下、好ましくは０.０１ｍｍ以下
の超微粉である。仮焼アルミナのＡｌ2Ｏ3含量が９９.
０重量％未満であると耐侵食性低下のために好ましくな
い。また、粒度が０.０３ｍｍを超えると耐侵食性低下
及び成形性不良のために好ましくない。なお、仮焼アル
ミナの添加配合量は、１０〜２０重量％、好ましくは１
２〜１８重量％の範囲内である。該配合量が１０重量％
未満であると成形性が不良となり、耐食性が低下するた
めに好ましくなく、また、２０重量％を超えると焼結
し、耐スポーリング性が低下するために好ましくない。The calcined alumina used in the present invention is:
It is a high-purity product having an Al 2 O 3 content of 99.0% by weight or more,
In addition, it is an ultrafine powder having a particle size of 0.03 mm or less, preferably 0.01 mm or less. The Al 2 O 3 content of the calcined alumina is 99.
If the amount is less than 0% by weight, it is not preferable because the erosion resistance is reduced. Further, if the particle size exceeds 0.03 mm, it is not preferable because the erosion resistance decreases and the moldability is poor. The amount of the calcined alumina to be added is 10 to 20% by weight, preferably 1 to 20% by weight.
It is within the range of 2 to 18% by weight. 10% by weight
If it is less than the above range, the moldability becomes poor and the corrosion resistance is lowered, and if it exceeds 20% by weight, it is sintered and the spalling resistance is lowered.
【００１４】次に、本発明に使用するクロム原料は、Ｃ
ｒ2Ｏ3含量が９０重量％以上、好ましくは９５重量％以
上で、粒度０.０３〜３ｍｍ、好ましくは０.０３〜１ｍ
ｍの範囲内のものである。クロム原料のＣｒ2Ｏ3含量が
９０重量％未満であるとＳｉＯ2、Ａｌ2Ｏ3、ＴｉＯ2、
ＦｅＯ等の不純成分による耐食性低下及び焼結化に伴う
耐スポーリング性の低下などのために好ましくない。ま
た、粒度が０.０３ｍｍ未満であると過焼結化に伴う弾
性率の上昇及び耐スポーリング性の低下のため好ましく
なく、また、３ｍｍを超えると組織の不良に伴う耐食性
の低下のため好ましくない。なお、クロム原料の添加配
合量は５〜２０重量％の範囲内である。該配合量が５重
量％未満であると耐侵食性の低下のために好ましくな
く、また、２０重量％を超えると耐スポーリング性及び
耐浸潤性の低下のために好ましくない。Next, the chromium raw material used in the present invention is C
The r 2 O 3 content is 90% by weight or more, preferably 95% by weight or more, and the particle size is 0.03 to 3 mm, preferably 0.03 to 1 m.
Within the range of m. If the Cr 2 O 3 content of the chromium raw material is less than 90% by weight, SiO 2 , Al 2 O 3 , TiO 2 ,
It is not preferable because the corrosion resistance decreases due to impure components such as FeO and the spalling resistance decreases due to sintering. Further, when the particle size is less than 0.03 mm, it is not preferable because the elastic modulus is increased due to oversintering and the spalling resistance is lowered, and when the particle size is more than 3 mm, the corrosion resistance is lowered due to a poor structure and thus it is preferable. Absent. The amount of the chromium material added is in the range of 5 to 20% by weight. If the amount is less than 5% by weight, the erosion resistance is unfavorably reduced. On the other hand, if it exceeds 20% by weight, the spalling resistance and the infiltration resistance are undesirably reduced.
【００１５】また、本発明に使用するジルコニア原料
は、粒度１ｍｍ以下、好ましくは０.０４４〜０.２ｍｍ
の範囲内のもので、例えば電融ジルコニア、焼結ジルコ
ニア等である。ジルコニア原料の粒度が０.０４４ｍｍ
未満であると耐スポーリング性の低下のために好ましく
なく、また、１ｍｍを超えると耐侵食性の低下及び機械
的強度劣化のために好ましくない。ジルコニア原料の添
加配合量は１０〜３０重量％、好ましくは１０〜２０重
量％の範囲内である。該配合量が１０重量％未満である
と耐侵食性及び耐スポーリング性の低下のため好ましく
なく、また、３０重量％を超えると機械的強度の不足の
ために好ましくない。The zirconia raw material used in the present invention has a particle size of 1 mm or less, preferably 0.044 to 0.2 mm.
For example, electrofused zirconia, sintered zirconia and the like. Particle size of zirconia raw material is 0.044mm
If it is less than 1 mm, it is not preferable because of a decrease in spalling resistance. The added amount of the zirconia raw material is in the range of 10 to 30% by weight, preferably 10 to 20% by weight. If the amount is less than 10% by weight, it is not preferable because the erosion resistance and spalling resistance decrease, and if it exceeds 30% by weight, the mechanical strength is insufficient.
【００１６】本発明のアルミナ・クロム・ジルコニア質
耐火物は、上述のような配合を有する原料混合物に所定
量のバインダーを添加、混練した後、常法により成形
し、１６５０℃以上の温度範囲で超高温焼成することに
より得られる。The alumina / chromium / zirconia refractory material of the present invention is formed by a conventional method after adding a predetermined amount of binder to the raw material mixture having the above-mentioned composition and kneading the mixture, and at a temperature range of 1650 ° C. or higher. It is obtained by firing at an ultrahigh temperature.
【００１７】ここで、バインダーとしてはメチルセルロ
ース等の有機バインダーあるいはポリエチレンオキサイ
ド等の熱可塑性樹脂等を使用することができ、この添加
量は上記原料混合物に対して外掛で０.３〜１重量％、
好ましくは０.５〜０.８重量％の範囲内である。なお、
該添加量が０.３重量％未満では素地強度の不足及び成
形性不良のために好ましくなく。また、１重量％を超え
ると物性が低下するために好ましくない。なお、粘土等
の無機質バインダーは耐食性不良などのため使用は好ま
しくない。また、適宜水を使用することもできる。Here, an organic binder such as methylcellulose or a thermoplastic resin such as polyethylene oxide can be used as the binder. The amount of the binder is 0.3 to 1% by weight based on the raw material mixture.
Preferably it is in the range of 0.5 to 0.8% by weight. In addition,
If the amount is less than 0.3% by weight, it is not preferable because of insufficient base strength and poor formability. Further, if it exceeds 1% by weight, the physical properties are deteriorated, which is not preferable. The use of an inorganic binder such as clay is not preferred because of poor corrosion resistance. In addition, water can be used as appropriate.
【００１８】また、成形方法は得に限定されるものでは
ないが、例えば１トン／ｃｍ2以上、好ましくは１.５ト
ン／ｃｍ2の圧力で所定の形状に高圧成形して気孔率を
低下させることが好ましい。The forming method is not limited to a particular method, but the porosity is lowered by high-pressure forming into a predetermined shape at a pressure of, for example, 1 ton / cm 2 or more, preferably 1.5 ton / cm 2. Preferably.
【００１９】上述のようにして所定の形状に成形した
後、５０〜１５０℃、好ましくは１００〜１５０℃の温
度範囲で、１５〜３０時間、好ましくは２０〜３０時間
程度乾燥した後、焼成する。焼成操作は、還元雰囲気条
件下では、炭化クロムの生成による表面硬化があり、ま
た、酸化雰囲気条件下ではクロムの酸化による組織不良
が発生するため、極力酸素とカーボンの供給を抑制した
中性雰囲気が好ましい。更に、焼成温度は１６５０℃以
上、好ましくは１７５０〜１８５０℃の温度範囲で、１
０〜３０時間、好ましくは２０〜３０時間程度の超高温
焼成することにより行うことができる。ここで、焼成温
度が１６５０℃未満であると耐侵食性の低下及び機械的
強度の不足等のために好ましくない。After being formed into a predetermined shape as described above, it is dried in a temperature range of 50 to 150 ° C., preferably 100 to 150 ° C. for 15 to 30 hours, preferably 20 to 30 hours, and then baked. . In the firing operation, under a reducing atmosphere condition, there is surface hardening due to the formation of chromium carbide, and under an oxidizing atmosphere condition, structural failure due to oxidation of chromium occurs, so a neutral atmosphere that minimizes the supply of oxygen and carbon Is preferred. Further, the sintering temperature is 1650 ° C. or higher, preferably 1750-1850 ° C.
It can be performed by firing at an ultra-high temperature for 0 to 30 hours, preferably about 20 to 30 hours. Here, if the firing temperature is less than 1650 ° C., it is not preferable because the erosion resistance is lowered and the mechanical strength is insufficient.
【００２０】上述のような配合割合及び製造条件で製造
された本発明のアルミナ・クロム・ジルコニア質耐火物
は下記のような特徴を有する： Ｃｒ2Ｏ3含量９０重量％以上のクロム原料を５〜２０
重量％使用し、好ましくは高圧成形し、更に、１６５０
℃以上の温度で超高温焼成することにより、高クロム配
合量のアルミナ・クロム・ジルコニア質耐火物を灰溶融
炉に使用する際に多量に生成していた変質層の生成を抑
制することができる； クロム原料とジルコニア原料とを上述の範囲内の配合
量で併用することにより、ジルコニア原料による高膨張
性と、クロム原料による収縮により、耐火物組織内にマ
イクロクラックを生成させて低弾性化することにより、
熱衝撃抵抗性を向上することができる； 主原料として上述の範囲内の配合量でアルミナ原料を
使用し、更に、仮焼アルミナ超微粉を併用することによ
り耐食性を高めることができる。The alumina-chromium-zirconia refractory of the present invention produced under the above-described mixing ratio and production conditions has the following characteristics: 5 chromium raw materials having a Cr 2 O 3 content of 90% by weight or more are used. ~ 20
Wt.%, Preferably high pressure molded, and 1650
By firing at ultra high temperature above ℃, it is possible to suppress the formation of alteration layer, which was generated in large quantities when using alumina / chromium / zirconia refractory with high chromium content in ash melting furnace. The combined use of the chromium raw material and the zirconia raw material in the blending amount within the above range results in high expansion of the zirconia raw material and contraction of the chromium raw material to generate microcracks in the refractory structure to reduce elasticity. By
The thermal shock resistance can be improved. The corrosion resistance can be increased by using an alumina raw material in the above-mentioned range as the main raw material and further using a calcined alumina ultrafine powder in combination.
【００２１】[0021]
【実施例】以下に実施例を挙げて本発明のアルミナ・ク
ロム・ジルコニア質耐火物を更に説明する。 実施例 以下の表１に記載する原料のうち、まず５〜１.０ｍｍ
の粗粒部をミキサーに投入し、次に、メチルセルロー
ス、ポリエチレンオキサイド及び水を添加して混合し、
更に、０.３ｍｍ以下の微粉部を投入し、最後に中間粒
を投入して７分間混合した。得られた混合物を１０００
ｋｇ／ｃｍ2の圧力でフリクションプレスすることによ
り成形し、得られた成形体を１００℃で２４時間乾燥し
た後、１７５０℃で２４時間焼成することにより供試体
を得た。得られた供試体の諸特性を表１に併記する。EXAMPLES The alumina / chromium / zirconia refractory material of the present invention will be further described below with reference to examples. Example Of the raw materials described in Table 1 below, first, 5 to 1.0 mm
The coarse part of is put into a mixer, and then methyl cellulose, polyethylene oxide and water are added and mixed,
Further, a fine powder portion of 0.3 mm or less was charged, and finally, intermediate grains were charged and mixed for 7 minutes. 1000 of the resulting mixture
Molding was performed by friction pressing at a pressure of kg / cm 2 , the obtained molded body was dried at 100 ° C. for 24 hours, and then calcined at 1750 ° C. for 24 hours to obtain a specimen. Table 1 also shows various properties of the obtained specimen.
【００２２】[0022]
【表１】 [Table 1]
【００２３】なお、電融アルミナとしては、Ａｌ2Ｏ3含
量９９.５重量％のものを、仮焼アルミナとしては、Ａ
ｌ2Ｏ3含量９９.０重量％のものを、酸化クロムとして
はＣｒ2Ｏ3含量９２重量％のものをそれぞれ使用した。As the fused alumina, one having an Al 2 O 3 content of 99.5% by weight and the calcined alumina as A
A chromium oxide having a l 2 O 3 content of 99.0% by weight and a chromium oxide having a Cr 2 O 3 content of 92% by weight were used.
【００２４】また、表１において、圧縮強さはJIS R220
6に基づいて、常温曲げ強さはJIS R2213に基づいて、侵
食テストはJIS 101−3に基づいて、スポーリングテスト
はJIS 105−1に基づいてそれぞれ試験した結果である。In Table 1, the compression strength is JIS R220.
The bending strength at room temperature is based on JIS R2213, the erosion test is based on JIS 101-3, and the spalling test is based on JIS 105-1.
【００２５】参考例 上記実施例で得られた本発明品１を灰溶融炉に配設して
実炉試験を行った結果、損傷スピードも遅く、極めて良
好な結果が得られた。Reference Example The product 1 of the present invention obtained in the above example was placed in an ash melting furnace and an actual furnace test was carried out. As a result, the damage speed was slow and very good results were obtained.
【００２６】[0026]
【発明の効果】本発明によれば、灰溶融炉用の従来の高
クロム含量のアルミナ・クロム・ジルコニア質耐火物に
比較して耐浸潤性、耐割れ性、耐食性が改善され、かつ
構造的スポリーリングにも優れたアルミナ・クムロ・ジ
ルコニア質耐火物及びその製造方法を提供することがで
きる。INDUSTRIAL APPLICABILITY According to the present invention, infiltration resistance, crack resistance and corrosion resistance are improved and structurally improved as compared with the conventional high chromium content alumina / chromium / zirconia refractory for ash melting furnace. It is possible to provide an alumina / cumulo / zirconia refractory material excellent in splaying and a method for producing the same.
Claims (2)
度０.０４４〜５ｍｍのアルミナ原料３０〜７５重量
％、Ａｌ2Ｏ3含量９９.０重量％以上で、粒度０.０３ｍ
ｍ以下の仮焼アルミナ１０〜２０重量％、Ｃｒ2Ｏ3含量
９０重量％以上で、粒度０.０３〜３ｍｍのクロム原料
５〜２０重量％、及び粒度１ｍｍ以下のジルコニア原料
１０〜３０重量％を含有してなり、１６５０℃以上の温
度範囲で超高温焼成して得られたものであることを特徴
とする灰溶融炉用アルミナ・クロム・ジルコニア質耐火
物。In 1. A Al 2 O 3 content of 99.0 wt% or more, alumina raw material 30-75 wt% of the particle size 0.044～5Mm, with Al 2 O 3 content of 99.0 wt% or more, a particle size 0.03m
10 to 20% by weight of calcined alumina of m or less, 5 to 20% by weight of Cr raw material having a Cr 2 O 3 content of 90% by weight or more and a grain size of 0.03 to 3 mm, and 10 to 30% by weight of zirconia raw material having a grain size of 1 mm or less. Alumina / chromium / zirconia refractory for an ash melting furnace, which is obtained by firing at an ultrahigh temperature in a temperature range of 1650 ° C or higher.
度０.０４４〜５ｍｍのアルミナ原料３０〜７５重量
％、Ａｌ2Ｏ3含量９９.０重量％以上で、粒度０.０３ｍ
ｍ以下の仮焼アルミナ１０〜２０重量％、Ｃｒ2Ｏ3含量
９０重量％以上で、粒度０.０３〜３ｍｍのクロム原料
５〜２０重量％、及び粒度１ｍｍ以下のジルコニア原料
５〜３０重量％を含有してなる原料混合物に所定量のバ
インダーを添加、混練した後、常法により成形し、１６
５０℃以上の温度範囲で超高温焼成することを特徴とす
る灰溶融炉用アルミナ・クロム・ジルコニア質耐火物の
製造方法。In wherein Al 2 O 3 content of 99.0 wt% or more, alumina raw material 30-75 wt% of the particle size 0.044～5Mm, with Al 2 O 3 content of 99.0 wt% or more, a particle size 0.03m
10 to 20% by weight of calcined alumina of m or less, 5 to 20% by weight of Cr raw material having a Cr 2 O 3 content of 90% by weight or more and a grain size of 0.03 to 3 mm, and 5 to 30% by weight of zirconia raw material having a grain size of 1 mm or less. A predetermined amount of binder is added to the raw material mixture containing and kneaded, and then molded by a conventional method.
A method for producing an alumina-chromium-zirconia refractory for an ash melting furnace, comprising firing at an ultra-high temperature in a temperature range of 50 ° C. or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6184761A JP2599896B2 (en) | 1994-08-05 | 1994-08-05 | Alumina-chromium-zirconia refractory and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6184761A JP2599896B2 (en) | 1994-08-05 | 1994-08-05 | Alumina-chromium-zirconia refractory and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0848574A true JPH0848574A (en) | 1996-02-20 |
| JP2599896B2 JP2599896B2 (en) | 1997-04-16 |
Family
ID=16158873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6184761A Expired - Fee Related JP2599896B2 (en) | 1994-08-05 | 1994-08-05 | Alumina-chromium-zirconia refractory and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2599896B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000072317A (en) * | 2000-08-29 | 2000-12-05 | 윤병철 | High alumina castable excluding cement |
| US6352951B1 (en) * | 1997-07-01 | 2002-03-05 | Didier-Werke Ag | Refractory material based on chromium corundum, a chromium corundum brick and the use of said brick |
| KR100361807B1 (en) * | 2000-09-20 | 2002-11-23 | 조선내화 주식회사 | gas input type porosity refractories |
| JP2007001827A (en) * | 2005-06-24 | 2007-01-11 | Asahi Glass Ceramics Co Ltd | Alumina-chromia based monolithic refractory |
| JP2009203119A (en) * | 2008-02-28 | 2009-09-10 | Hitachi Zosen Corp | Heat-resistant ceramics |
| WO2010011516A3 (en) * | 2008-07-22 | 2010-04-15 | Harbison-Walker Refractories Company | Chromia-alumina refractory |
| JP2016199449A (en) * | 2015-04-14 | 2016-12-01 | Ｄｏｗａエコシステム株式会社 | Monolithic refractory composition and monolithic refractory |
| CN113354424A (en) * | 2021-06-15 | 2021-09-07 | 洛阳广潇新材料科技有限公司 | High-stripping-resistance oxygen lance brick and preparation method thereof |
-
1994
- 1994-08-05 JP JP6184761A patent/JP2599896B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6352951B1 (en) * | 1997-07-01 | 2002-03-05 | Didier-Werke Ag | Refractory material based on chromium corundum, a chromium corundum brick and the use of said brick |
| KR20000072317A (en) * | 2000-08-29 | 2000-12-05 | 윤병철 | High alumina castable excluding cement |
| KR100361807B1 (en) * | 2000-09-20 | 2002-11-23 | 조선내화 주식회사 | gas input type porosity refractories |
| JP2007001827A (en) * | 2005-06-24 | 2007-01-11 | Asahi Glass Ceramics Co Ltd | Alumina-chromia based monolithic refractory |
| JP2009203119A (en) * | 2008-02-28 | 2009-09-10 | Hitachi Zosen Corp | Heat-resistant ceramics |
| WO2010011516A3 (en) * | 2008-07-22 | 2010-04-15 | Harbison-Walker Refractories Company | Chromia-alumina refractory |
| US7754633B2 (en) | 2008-07-22 | 2010-07-13 | Harbison-Walker Reeractories Company | Chromia-alumina refractory |
| KR101283756B1 (en) * | 2008-07-22 | 2013-07-08 | 하비슨-워커 리프랙토리스 컴패니 | Chromina-alumina refractory |
| JP2016199449A (en) * | 2015-04-14 | 2016-12-01 | Ｄｏｗａエコシステム株式会社 | Monolithic refractory composition and monolithic refractory |
| CN113354424A (en) * | 2021-06-15 | 2021-09-07 | 洛阳广潇新材料科技有限公司 | High-stripping-resistance oxygen lance brick and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2599896B2 (en) | 1997-04-16 |
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