JP2000290078A - Monolithic refractory - Google Patents
Monolithic refractoryInfo
- Publication number
- JP2000290078A JP2000290078A JP11102881A JP10288199A JP2000290078A JP 2000290078 A JP2000290078 A JP 2000290078A JP 11102881 A JP11102881 A JP 11102881A JP 10288199 A JP10288199 A JP 10288199A JP 2000290078 A JP2000290078 A JP 2000290078A
- Authority
- JP
- Japan
- Prior art keywords
- refractories
- alumina
- weight
- refractory
- silica
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011823 monolithic refractory Substances 0.000 title abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004927 clay Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 6
- 235000021317 phosphate Nutrition 0.000 claims abstract description 6
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 claims abstract description 5
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052621 halloysite Inorganic materials 0.000 claims abstract description 5
- 229910052622 kaolinite Inorganic materials 0.000 claims abstract description 5
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 5
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims abstract description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 4
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 4
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 12
- 239000011819 refractory material Substances 0.000 abstract description 24
- 238000004901 spalling Methods 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract 1
- 238000004299 exfoliation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 229910021647 smectite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
-
- 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
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
-
- 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
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- 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
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、各種工業炉に使
用される流し込み施工用耐火物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory for pouring construction used in various industrial furnaces.
【０００２】[0002]
【従来の技術】各種の工業炉の内張り用耐火物には、こ
れまでアルミナセメントを硬化剤としたキャスタブル耐
火物、練り土状のプラスチック耐火物が従来から使用さ
れている。この内、プラスチック耐火物は、アルミナセ
メントを硬化剤として使用していないため、キャスタブ
ル耐火物に比較して耐熱性の低下が少ない。即ち、キャ
スタブル中のアルミナセメントの成分の１つであるＣａ
Ｏが主に耐熱性を低下させるが、プラスチックにはアル
ミナセメントは使用していないので、耐熱性原料を低下
させることが少ない。また、使用中の温度変化や炉の冷
却加熱により発生する熱スポーリングによる亀裂、剥離
などが小さくて耐用期間が長く、良好な結果が得られて
いる。2. Description of the Related Art Castable refractories using alumina cement as a hardening agent and kneaded clay-like plastic refractories have hitherto been used as refractories for lining various industrial furnaces. Among these, plastic refractories do not use alumina cement as a hardening agent, and therefore have less decrease in heat resistance than castable refractories. That is, one of the components of the alumina cement in the castable is Ca.
O mainly reduces the heat resistance, but does not reduce the heat-resistant raw material because alumina cement is not used for plastic. Further, cracks and peeling due to temperature changes during use and thermal spalling generated by cooling and heating the furnace are small, the service life is long, and good results are obtained.
【０００３】しかしながら、練り土状のプラスチック耐
火物を施工する場合は、キャスタブル耐火物のように流
し込み施工ができないので、練り土状のプラスチック耐
火物を型枠内に詰め込み、エアーランマーや木槌などで
打ち込んで各種工業炉の内張り耐火材としなければなら
なかった。このために、築炉作業には熟練を要し、また
流し込みが可能なキャスタブル耐火物の場合よりも施工
時間が長くかかるといった問題があった。特に、最近は
これらの作業に対応できる熟練築炉工が不足していると
ともに、施工時間の短縮その他から施工が容易にできる
耐火物への指向性が進んでいる。[0003] However, when the refractory in the form of kneaded earth is constructed, the refractory in the form of castable refractory cannot be cast and cast, so that the refractory in the form of kneaded earth is packed in a mold, and an air rammer, a mallet or the like is used. It had to be used as a refractory lining for various industrial furnaces. For this reason, there is a problem that the furnace-building operation requires skill and the construction time is longer than that of a castable refractory that can be poured. In particular, recently, there is a shortage of skilled furnace furnaces capable of coping with these operations, and the directivity toward refractory materials that can be easily constructed is shortened due to shortening of construction time and the like.
【０００４】[0004]
【発明が解決しようとする課題】この発明は、上記に述
べたプラスチック耐火物の特長である耐熱性低下がキャ
スタブル耐火物より小さく、また熱スポーリングによる
亀裂、剥離などの損耗がキャスタブル耐火物より小さい
などの特長を維持したうえで、さらにキャスタブル耐火
物と同様に短時間に流し込みが可能で施工が容易な不定
形耐火物を得ようとするものである。SUMMARY OF THE INVENTION According to the present invention, the above-mentioned plastic refractories exhibit less heat resistance reduction than castable refractories, and have less damage than castable refractories due to thermal spalling. It is intended to obtain an irregular-shaped refractory that can be poured in a short period of time and is easy to construct, as well as castable refractories, while maintaining features such as small size.
【０００５】[0005]
【課題を解決するための手段】この発明は、炭酸塩およ
び縮合りん酸塩の中の１種以上を合量で０．００１〜
０．５重量％と、カオリナイト、ハロイサイトおよびモ
ンモリロナイトの中のいづれかを主成分とする粘土原料
の１種以上を合量で０．５〜１０重量％と、水硬性アル
ミナを１〜１０重量％と、残部がアルミナ、アルミナ−
シリカ系、シリカ、ジルコン、炭化珪素等の各種耐火原
料の１種以上とからなる不定形耐火物である。According to the present invention, at least one of a carbonate and a condensed phosphate is used in a total amount of 0.001 to 0.001.
0.5% by weight, 0.5 to 10% by weight in total of at least one kind of clay raw material containing at least one of kaolinite, halloysite and montmorillonite, and 1 to 10% by weight of hydraulic alumina And the remainder is alumina, alumina-
An amorphous refractory comprising at least one of various refractory raw materials such as silica-based, silica, zircon, and silicon carbide.
【０００６】[0006]
【発明の実施の形態】本発明の不定形耐火物は、流し込
み施工が出来て、しかも流し込み施工した施工体が２４
時間養生後に脱型が可能とするために、炭酸塩及び縮合
りん酸塩の中の１種以上を合量で０．００１〜０．５重
量％、水硬性アルミナを１〜１０重量％用いる。炭酸塩
及び縮合りん酸塩の中の１種以上を合量で０．００１未
満では、流し込み施工した施工体が２４時間養生後に脱
型できるまでの強度に硬化せず、またこの配合比が〜
０．５重量％を超えると短時間で硬化が生じて必要な可
使用時間が得られない。炭酸塩及び縮合りん酸塩の中の
１種以上の好ましい配合比は０．００３〜０．４重量％
である。BEST MODE FOR CARRYING OUT THE INVENTION The refractory of an irregular shape according to the present invention is capable of being poured and has a construction of 24 hours.
In order to enable demolding after time curing, one or more of carbonates and condensed phosphates are used in a total amount of 0.001 to 0.5% by weight, and hydraulic alumina is used in an amount of 1 to 10% by weight. If one or more of the carbonates and the condensed phosphates are less than 0.001 in total, the cast body does not harden to a strength enough to be released from the mold after curing for 24 hours.
If it exceeds 0.5% by weight, curing takes place in a short time, and the necessary usable time cannot be obtained. The preferred compounding ratio of one or more of the carbonate and the condensed phosphate is 0.003 to 0.4% by weight.
It is.
【０００７】また、水硬性アルミナの配合比が１重量％
未満では流し込み施工した施工体が２４時間養生後に発
現する強度が小さく脱型ができない。水硬性アルミナの
配合比が１０重量％を超えると、養生後および乾燥後と
もにプラスチック耐火物以上の強度となって過剰添加と
なる。この発明の不定形耐火物は、養生よび乾燥後にプ
ラスチック耐火物程度の強度が得られれば十分であり、
それ以上の強度は必要としないものである。水硬性アル
ミナさらに好ましい添加量は２〜８重量％である。Further, the mixing ratio of hydraulic alumina is 1% by weight.
If it is less than 30, the strength of the cast body after 24 hours of curing is small, and the cast body cannot be removed. When the compounding ratio of the hydraulic alumina exceeds 10% by weight, the strength becomes higher than that of the plastic refractory both after curing and after drying, resulting in excessive addition. The amorphous refractory of the present invention is sufficient as long as it has a strength equivalent to that of a plastic refractory after curing and drying.
No further strength is required. The more preferable addition amount of hydraulic alumina is 2 to 8% by weight.
【０００８】本発明のその他の原料である粘土は、プラ
スチック耐火物の特徴である耐熱性の低下がキャスタブ
ル耐火物より小さく、また熱スポーリングによる亀裂、
剥離などによる損耗がキャスタブル耐火物より小さい特
徴を維持するために重要な部材である。これらの粘土に
は、カオリナイト、ハロイサイト、モンモリロナイトな
どを主成分とするカオリン、ベントナイト、木節粘土、
ガイロメ粘土、スメクタイト等の粘土原料の１種以上を
合量で０．５〜１０重量％使用する。これらの粘土原料
の使用料の合計が０．５重量％未満では流し込み施工に
必要な添加水分量が少なくなり、施工体が緻密化してプ
ラスチック耐火物が持つ熱スポーリングによる亀裂、剥
離などの損耗の低減が図れない。また、粘土原料合計の
使用量が１０重量％を超えると、流し込み施工に必要な
添加水分量が多くなり過ぎ、施工体の気孔率が大きくな
って収縮や強度低下が生じて好ましくない。カオリナイ
ト、ハロイサイト、モンモリロナイトなどを主成分とす
るカオリン、ベントナイト、木節粘土、ガイロメ粘土、
スメクタイト等の粘土原料の１種以上の合量の好ましい
添加量は、０．８〜８重量％である。Clay, which is another raw material of the present invention, has a lower heat resistance characteristic of plastic refractories than castable refractories, and has cracks due to thermal spalling.
It is an important member to maintain the characteristic that the wear due to peeling or the like is smaller than that of castable refractories. These clays include kaolinite, halloysite, montmorillonite and other kaolin, bentonite, Kibushi clay,
One or more clay raw materials such as gairome clay and smectite are used in a total amount of 0.5 to 10% by weight. If the total amount of the use of these clay raw materials is less than 0.5% by weight, the amount of added water required for casting is reduced, and the construction is densified, resulting in wear such as cracks and peeling due to thermal spalling of plastic refractories. Cannot be reduced. On the other hand, when the total amount of the clay raw materials exceeds 10% by weight, the amount of added water necessary for pouring is excessively large, and the porosity of the construction body is increased, which is not preferable because shrinkage and strength decrease occur. Kaolin, bentonite, Kibushi clay, Gairome clay, mainly composed of kaolinite, halloysite, montmorillonite,
A preferable addition amount of one or more kinds of clay raw materials such as smectite is 0.8 to 8% by weight.
【０００９】残部のアルミナ、アルミナ−シリカ系、シ
リカ、ジルコン、炭化珪素などの各種耐火原料の１種以
上は、通常その粒度が１０mm以下であるが、この発明に
使用されるものは必ずしもそれに限定されず、施工体の
大きさや用途によっては、更に大きな粒径の粗骨材を用
いることが出来る。The remaining one or more of various refractory raw materials such as alumina, alumina-silica, silica, zircon and silicon carbide usually have a particle size of 10 mm or less, but those used in the present invention are not necessarily limited thereto. However, a coarse aggregate having a larger particle size can be used depending on the size and use of the construction body.
【００１０】[0010]
【実施例】（実施例１〜７、比較例１〜７）表１及び表
２に示す実施例１〜７に示す原料配合比の不定形耐火物
を調整した。同時に、表２および表３に示す比較例の不
定形耐火物を調整した。これらの実施例および比較例に
ついて、下記の評価試験を行った。EXAMPLES (Examples 1 to 7 and Comparative Examples 1 to 7) Irregular refractories having the raw material mixing ratios shown in Examples 1 to 7 shown in Tables 1 and 2 were prepared. At the same time, amorphous refractories of Comparative Examples shown in Tables 2 and 3 were prepared. The following evaluation tests were performed on these examples and comparative examples.
【００１１】 １ フロー値測定 フロー測定器を使用しフロー値を測定した。1 Flow value measurement The flow value was measured using a flow measuring device.
【００１２】 ２ 曲げ試験 ＪＩＳ ２５７５にて実施した。2 Bending test The bending test was performed according to JIS 2575.
【００１３】 ３ 線変化率試験 ＪＩＳ ２５７６にて実施した。[0013] Three-line change rate test was carried out according to JIS 2576.
【００１４】 ４ 耐スポーリング性 テストピースを２３０×１１４×６５mmのＪＩＳＲ 2657並み形状に成形後、１１０℃２４時間乾燥した テストピースを予め１２００℃に加熱してある電気 抵抗炉中に、テストピースの長手方向（２３０mm方 向）の１／２長さを挿入後、電気抵抗炉が１２００ ℃に回復後１５分間保持し、その後テストピースを 電気炉の炉内より取り出し、加熱部分が水中に浸る ようにセットした容器に１５分間挿入し、その後取 り出し大気中に１５分間放置、その後再度１２００ ℃に加熱してある電気抵抗炉中に、テストピースの 長手方向（２３０mm方向）の１／２長さを挿入し、 その後上記同様の作業を繰返し、計５回実施した。 試験途中や試験後の状況から耐熱スポーリング性を 評価した。4. Spalling Resistance After forming the test piece into a 230 × 114 × 65 mm shape similar to JISR 2657, the test piece was dried at 110 ° C. for 24 hours. After inserting a half length in the longitudinal direction (direction of 230 mm), the electric resistance furnace is kept at 1200 ° C for 15 minutes after it recovers, then the test piece is taken out of the furnace of the electric furnace and the heated part is immersed in water. Into a container set as above for 15 minutes, then take it out, leave it in the atmosphere for 15 minutes, and then place it again in an electric resistance furnace heated to 1200 ° C for half the length of the test piece (230 mm direction). After inserting the length, the same operation as above was repeated, and the operation was performed five times in total. The heat-resistant spalling property was evaluated during and after the test.
【００１５】評価試験の結果を表１ないし３に示した。The results of the evaluation tests are shown in Tables 1 to 3.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【表３】 [Table 3]
【００１９】表１および表２に示すように、実施例１な
いし７は、いずれも水分添加量、可使用時間、流動性
（フロー値）、曲げ強さ、線変化率、耐熱スポーリング
性のいずれも良好な結果が得られている。これに対し、
比較例１は、耐スポーリング性は良好な結果は得られて
いるものの、他の水分添加量、可使用時間、流動性、線
変化率などの特性がいずれもやや劣るものとなってい
る。比較例２は、水分添加量、流動性、曲げ強さ、線変
化率、耐スポーリング性の各特性は良好であるが、流し
込み作業に最も重要とされる可使用時間が短すぎて、こ
れでは流し込み作業に使用できない。比較例３は、耐ス
ポーリング性の低下が大きい。比較例４は、耐スポーリ
ング性は良好であるが、その他の水分添加量、可使用時
間、流動性、曲げ強さ、線変化率のいずれも良好でな
い。比較例５は、曲げ強さが極端に悪い。比較例６は、
水分添加量と線変化率が劣となっている。比較例７は、
水分添加量と強さと耐熱スポーリング性が劣である。As shown in Tables 1 and 2, Examples 1 to 7 all show the amounts of water added, usable time, fluidity (flow value), bending strength, linear change rate, and heat-resistant spalling property. In each case, good results have been obtained. In contrast,
In Comparative Example 1, although good results were obtained in spalling resistance, other properties such as the amount of added water, usable time, fluidity, and linear change rate were slightly inferior. Comparative Example 2 shows that the amount of water added, fluidity, flexural strength, linear change rate, and spalling resistance are good, but the usable time, which is most important for the casting operation, is too short. Cannot be used for pouring work. Comparative Example 3 has a large decrease in spalling resistance. In Comparative Example 4, the spalling resistance was good, but none of the other amounts of water added, usable time, fluidity, bending strength, and linear change rate were good. Comparative Example 5 has extremely poor bending strength. Comparative Example 6
The water addition amount and the linear change rate are inferior. Comparative Example 7
Poor water content, strength, and heat resistant spalling properties.
【００２０】[0020]
【発明の効果】以上のように、この発明の不定形耐火物
を工業炉に使用すれば、プラスチック耐火物の特徴であ
る耐熱性の低下がキャスタブル耐火物より小さく出来
て、また熱スポーリングによる亀裂、剥離などの損耗が
キャスタブル耐火物より小さいなどの利点を維持し、さ
らにキャスタブル耐火物と同様に短時間に流し込み施工
が可能で、施工も容易に行うことが出来るようにするこ
とが可能である。As described above, when the amorphous refractory of the present invention is used in an industrial furnace, the decrease in heat resistance characteristic of plastic refractories can be made smaller than that of castable refractories, and the heat spalling is not required. Maintains the advantage that the wear such as cracks and delamination is smaller than castable refractories, and it can be poured in a short time like castable refractories and can be easily constructed. is there.
Claims (1)
上を合量で０．００１〜０．５重量％と、カオリナイ
ト、ハロイサイトおよびモンモリロナイトの中のいづれ
かを主成分とする粘土原料の１種以上を合量で０．５〜
１０重量％と、水硬性アルミナを１〜１０重量％と、残
部がアルミナ、アルミナ−シリカ系、シリカ、ジルコ
ン、炭化珪素等の各種耐火原料の１種以上とからなる不
定形耐火物。1. A clay raw material containing at least one of carbonates and condensed phosphates in a total amount of 0.001 to 0.5% by weight and one of kaolinite, halloysite and montmorillonite as a main component. 0.5 or more in total
An amorphous refractory comprising 10% by weight, 1 to 10% by weight of hydraulic alumina, and at least one of various refractory raw materials such as alumina, alumina-silica, silica, zircon and silicon carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102881A JP2000290078A (en) | 1999-04-09 | 1999-04-09 | Monolithic refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102881A JP2000290078A (en) | 1999-04-09 | 1999-04-09 | Monolithic refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000290078A true JP2000290078A (en) | 2000-10-17 |
Family
ID=14339222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11102881A Pending JP2000290078A (en) | 1999-04-09 | 1999-04-09 | Monolithic refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000290078A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247720A (en) * | 2007-03-30 | 2008-10-16 | Nichias Corp | Monolithic refractory forming material and monolithic refractory formed body |
| WO2009084484A1 (en) * | 2007-12-28 | 2009-07-09 | Nippon Crucible Co., Ltd. | Casting material based on silicon carbide |
| JP2021109783A (en) * | 2020-01-06 | 2021-08-02 | 品川リフラクトリーズ株式会社 | Castable refractory |
-
1999
- 1999-04-09 JP JP11102881A patent/JP2000290078A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247720A (en) * | 2007-03-30 | 2008-10-16 | Nichias Corp | Monolithic refractory forming material and monolithic refractory formed body |
| WO2009084484A1 (en) * | 2007-12-28 | 2009-07-09 | Nippon Crucible Co., Ltd. | Casting material based on silicon carbide |
| JP2009161375A (en) * | 2007-12-28 | 2009-07-23 | Nippon Crucible Co Ltd | Silicon carbide matter casting material |
| JP2021109783A (en) * | 2020-01-06 | 2021-08-02 | 品川リフラクトリーズ株式会社 | Castable refractory |
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