JPS5933549B2 - Monolithic refractories - Google Patents
Monolithic refractoriesInfo
- Publication number
- JPS5933549B2 JPS5933549B2 JP55158457A JP15845780A JPS5933549B2 JP S5933549 B2 JPS5933549 B2 JP S5933549B2 JP 55158457 A JP55158457 A JP 55158457A JP 15845780 A JP15845780 A JP 15845780A JP S5933549 B2 JPS5933549 B2 JP S5933549B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- fireclay
- castable
- strength
- powder
- 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
Links
Landscapes
- Ceramic Products (AREA)
Description
【発明の詳細な説明】
本発明は各種窯炉内張り、溶湯容器内張り用不定形耐火
物に関するものであり、その目的とするところは流し込
み施工終了後、急激な加熱乾燥を行っても爆裂や剥離崩
壊現象を生じない耐火粘土を結合材とする流し込み用不
定形耐火物を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monolithic refractory for lining various types of kilns and molten metal containers, and its purpose is to prevent explosions and peeling even when rapidly heated and dried after pouring. It is an object of the present invention to provide a castable monolithic refractory using fireclay as a binder that does not cause a collapse phenomenon.
従来、流し込み用の不定形耐火物としては、一般にアル
ミナセメントを結合材とした水硬性キャスタブル耐火物
が主体であったが、この種の水硬性キャスタブル耐火物
は、アルミナセメントを１０重量％以上添加している為
に１２００℃以上の高温度域での熱間特性が劣り、更に
８００℃〜１０００℃の中間温度域では脱水による強度
劣化が特に著しい等の欠点がある。Conventionally, castable castable refractories that use alumina cement as a binder have been the main type of castable refractories used for pouring. As a result, the hot properties in the high temperature range of 1200°C or higher are poor, and furthermore, in the intermediate temperature range of 800°C to 1000°C, strength deterioration due to dehydration is particularly significant.
これらの欠点を是正するために、最近耐火粘土を結合材
として、解膠剤及び凝膠剤を添加した流し込み用キャス
タブル耐火物が開発され、その熱間特性即ち耐火度、耐
スポーリング性、熱間強度、容積安定性等が従来の水硬
性キャスタブル耐火物に比べてすぐれていることから、
各種窯炉壁、天井、炉床等の内張り材として使用されて
いる。In order to correct these shortcomings, castable refractories for pouring have recently been developed using fireclay as a binder and adding deflocculants and flocculants. Because it has superior mechanical strength and volume stability compared to conventional hydraulic castable refractories,
It is used as lining material for various kiln walls, ceilings, hearths, etc.
しかし、このキャスタブル耐火物は、耐火粘土を微粉部
分に最高２０重量％程度添加しているので、施工体の通
気性は極端に低下し、乾燥加熱時、水蒸気の脱出が困難
であり、しばしば爆裂的スポーリングを引きおこす。However, since this castable refractory has a maximum of 20% by weight of fireclay added to the fine powder part, the permeability of the constructed body is extremely reduced, and it is difficult for water vapor to escape during dry heating, and it often explodes. cause target spalling.
このような爆裂を防止する為には、施工後硬化を待って
脱枠し、さらに２４時間以上養生後一定昇温曲線に従っ
て乾燥させる必要があり、乾燥に長時間を要する。In order to prevent such explosions, it is necessary to wait for curing after construction, remove the frame, and then dry it according to a constant temperature rise curve after curing for at least 24 hours, which takes a long time.
また、耐火粘土と凝膠剤の凝集作用による硬化を期待す
るものであるから、特に冬季は凝集効果が低下し脱枠ま
でに長時間（４８時間以上）を要することや脱枠後の施
工体の強度が極端に低い等の欠点がある。Furthermore, since hardening is expected to occur due to the coagulation effect of the fireclay and coagulant, the coagulation effect decreases especially in winter, and it takes a long time (48 hours or more) to remove the frame, and the construction material after the frame is removed. It has drawbacks such as extremely low strength.
本発明は上述のような耐火粘土を結合材として使用した
キャスタブル耐火物の諸欠点を解決したものである。The present invention solves the various drawbacks of castable refractories using fireclay as a binding material as described above.
以下本発明について更に詳細に説明すると、本発明は予
め粒度調整した耐火性骨材に耐火粘土を加えた耐火物１
００重量％に対して上記耐火粘土を３〜１２内割重量％
、解膠剤を０．０２〜０．５外割重量％、アルミン酸石
灰を０．５〜５外割重量％および純度９０％以上で、０
．０７４ｍｍ以下の粒度の粉末を５０重量％以上を有す
る金属アルミニウム粉末を０．１〜５．５５外割重量％
添加した流し込み用不定形耐火物である。To explain the present invention in more detail below, the present invention is a refractory 1 in which fireclay is added to refractory aggregate whose particle size has been adjusted in advance.
00% by weight, the above fireclay is 3 to 12% by weight.
, a peptizer of 0.02 to 0.5% by weight, aluminate lime of 0.5 to 5% by weight, and a purity of 90% or more, 0
．． 0.1 to 5.55% by weight of metal aluminum powder containing 50% by weight or more of powder with a particle size of 0.074 mm or less
It is a monolithic refractory for pouring.
表１では耐火性骨材を８０重量部（粘土質シャモット粗
粒５０、中粒２０、アルミナ微粉１０）、耐火粘土１０
重量部耐火物合計９０重量部を計量混合し、これに対し
て解膠剤、凝膠剤、金属アルミニウム粉末等を同表１に
示す重量部だけ添加したものである。In Table 1, 80 parts by weight of fire-resistant aggregate (50 parts by weight of clayey chamotte coarse grains, 20 parts of medium grains, 10 parts of fine alumina powder), 10 parts by weight of fire-resistant aggregate,
Parts by weight A total of 90 parts by weight of refractories were weighed and mixed, and to this were added deflocculant, flocculant, metal aluminum powder, etc. in the parts by weight shown in Table 1.
そして上記重量％は上記合計耐火物９０重量部を１００
％として耐火粘土はその内削、他は外削として重量％に
換算したものである。The above weight percentage is 100 parts by weight of the above total refractory material.
As a percentage, fireclay is internally removed, and others are externally removed, converted to weight percent.
解膠剤にはフミン酸ソーダ、ヘキサ・メタ燐酸ソーダ、
ピロ燐酸ソーダ等が用いられ凝膠剤にはアルミン酸石灰
が用いられる。Deflocculants include sodium humate, sodium hexa-metaphosphate,
Sodium pyrophosphate and the like are used, and lime aluminate is used as the flocculant.
耐火性骨材としてはボーキサイト、パン土頁岩、カイア
ナイト、シリマナイト、焼結アルミナ、電融アルミナ、
合成ムライト、海水マグネシアクリンカ−、ジルコン、
溶融シリカ、人造黒鉛、クロム鉄鉱石、炭化珪素、窒化
珪素等を使用することができる。Refractory aggregates include bauxite, clay shale, kyanite, sillimanite, sintered alumina, fused alumina,
Synthetic mullite, seawater magnesia clinker, zircon,
Fused silica, artificial graphite, chromite ore, silicon carbide, silicon nitride, etc. can be used.
耐火粘土は流し込みとしての流動性、耐火性等の点から
、比較的粗粒で白色貧可塑性型カオリン系−次粘土が有
効である。As the fireclay, relatively coarse-grained, white, poorly plasticized kaolin-based clay is effective from the viewpoint of fluidity for pouring, fire resistance, etc.
粘土の添加量が１２．０重量％より多いと、流し込み施
工時の粘性が高過ぎると共に熱間特性が低下する。If the amount of clay added is more than 12.0% by weight, the viscosity during pouring will be too high and the hot properties will deteriorate.
また３、０重量％より少ないと低温から高温域で硬化体
の強度発現が小さい。If it is less than 3.0% by weight, the strength of the cured product will be low in the low to high temperature range.
アルミニウム金属粉末の効果としては、水を混練液とし
た流し込み用キャスタブル耐火物に添加すると、上記（
１）式の反応がおこり、添加した水は一部、分解されて
水酸化アルミニウムと水素ガスになる。As for the effects of aluminum metal powder, when added to castable refractories for pouring using water as a kneading liquid, the above (
The reaction of formula 1) occurs, and the added water is partially decomposed into aluminum hydroxide and hydrogen gas.
反応開始と同時に施工体は発熱を伴い施工体内部の温度
上昇により粘土の凝固が促進され水分の蒸発効果と共に
硬化してゆく。At the same time as the reaction starts, the construction body generates heat and the temperature rise inside the construction body accelerates the solidification of the clay and hardens with the effect of water evaporation.
この時の反応開始時間および水素ガス発生量は金属アル
ミニウム粉末の純度と粒度に関係し、純度については９
０％以下のものは反応時間開始のバラツキが大きく、粒
度については０．０７４ｍｍ以下の粒度の粉体カ５０重
量％より少いと反応開始時間が遅く、また硬化後の強度
が弱く好ましくない。The reaction start time and the amount of hydrogen gas generated at this time are related to the purity and particle size of the metal aluminum powder.
If it is less than 0%, the reaction time will vary widely, and if the particle size is less than 50% by weight of powder with a particle size of 0.074 mm or less, the reaction start time will be slow and the strength after curing will be weak, which is not preferable.
添加量については０．１重量％より少いと、急激な加熱
乾燥を行った場合爆裂することがあり、５．６重量％よ
り多いと、水素ガス発生量が多く鋳込み成形後の施工体
の膨れが大きくなる為、亀裂が多く発生し強度も弱くて
好ましくない。If the amount added is less than 0.1% by weight, it may explode if heated and dried rapidly, and if it is more than 5.6% by weight, a large amount of hydrogen gas will be generated, resulting in swelling of the cast body after casting. This is undesirable as it increases the size of the cracks, causes many cracks, and weakens the strength.
金属アルミニウム粉末の上記範囲内での添加は、急激な
加熱乾燥時の爆裂を防止することができる。Addition of metallic aluminum powder within the above range can prevent explosion during rapid heating and drying.
この爆裂防止の機構は明らかでないが、養生中の発熱に
よる含有水分の減少およびガス発生による通気率の上昇
等によるものと思われる。Although the mechanism for preventing this explosion is not clear, it is thought to be due to a decrease in moisture content due to heat generation during curing and an increase in air permeability due to gas generation.
上述のような適正な添加割合に基いて、耐火性骨材と耐
火性粘土、金属アルミニウム粉末を混合し、水を混練液
として流し込んだ場合、流し込み終了後２Ｈｒｓ〜８Ｈ
ｒｓ （時間）で脱枠が可能であり、更に養生中、（
１）式の反応が始まると同時に材料は発熱を開始する。When fire-resistant aggregate, fire-resistant clay, and metal aluminum powder are mixed based on the appropriate addition ratio as described above, and water is poured as a kneading liquid, it will take 2 to 8 hours after pouring is complete.
It is possible to remove the frame in rs (hours), and during curing, (
1) The material starts to generate heat at the same time as the reaction of formula starts.
この発熱温度は、１００℃まで上昇し、発熱時間は３Ｈ
ｒｓ〜８Ｈｒｓ （時間）継続し、この間に材料中の
水分は６０〜７０重量％脱水する。This exothermic temperature rises to 100℃, and the exothermic time is 3 hours.
The process continues for rs~8Hrs (hours), during which time the water in the material is dehydrated by 60~70% by weight.
このように材料内部から発熱を伴う反応が始まると材料
中の水分は、キャスタブル耐火物中から漸次放散される
と同時に、材料は養生中に自身の発熱反応により、３Ｈ
ｒｓ〜８Ｈｒｓ（時間）乾燥状態におかれるため、耐火
粘土の凝集力は高まり、乾燥（１１０℃）強度に近づく
。When a reaction that generates heat starts from inside the material, the moisture in the material is gradually dissipated from the castable refractory, and at the same time, the material undergoes 3H due to its own exothermic reaction during curing.
Since it is left in a dry state for rs to 8 hours (hours), the cohesive force of the fireclay increases and approaches its dry (110° C.) strength.
さらにこの乾燥は、外部からの加熱によるものでなく、
材料内部から徐々に乾燥されながら耐火粘土が凝集して
ゆくため、硬化体の内部歪を伴うことなく硬化する。Furthermore, this drying is not caused by external heating;
Since the fireclay aggregates while being gradually dried from the inside of the material, it hardens without causing any internal distortion of the hardened material.
これらの理由も急熱乾燥により爆裂を起さない一因と考
えられる。These reasons are also considered to be one reason why explosions do not occur due to rapid heat drying.
また発熱反応開始から終了までに要する時間は、実際の
窯炉内張りや溶湯容器内張りに使用する場合は２４時間
以内とすることが望ましい。Further, the time required from the start to the end of the exothermic reaction is desirably within 24 hours when used for actual lining of a kiln or molten metal container.
本発明の目的も鋳込み終了後２４時間以内に脱枠発熱反
応を終え、すみやかに加熱乾燥に入ることを可能ならし
めることにあり、乾燥昇温速度は従来の耐火粘土結合キ
ャスタブルと異り、注意深く、長時間低温乾燥（４００
℃以下）を行う等の必要は全くなく、乾燥開始と同時に
５００℃〜８００℃に急激昇温を行っても爆裂や剥離崩
壊現象を伴わず短時間で操業を可能とするものである。The purpose of the present invention is to complete the deframing exothermic reaction within 24 hours after the completion of casting, and to make it possible to immediately begin heating and drying. , low temperature drying for a long time (400
℃ or lower), and even if the temperature is rapidly raised to 500° C. to 800° C. at the same time as drying starts, operation can be carried out in a short time without causing any explosion or peeling/collapse phenomena.
さらに、急激加熱乾燥を行った場合、通常の水硬性キャ
スタブル耐火物や従来の耐火粘土結合キャスタブル耐火
物では顕著な強度劣化が認められるが、本発明品はこの
ような欠点がなく、通常の焼・酸強度と同程度の強度発
現を示す。Furthermore, when subjected to rapid heating and drying, a remarkable deterioration in strength is observed in ordinary hydraulic castable refractories and conventional fireclay-bonded castable refractories, but the product of the present invention does not have such drawbacks and is superior to ordinary castable refractories.・Exhibits strength comparable to acid strength.
以下に本発明の実施例を示す。Examples of the present invention are shown below.
上記実施例に示すように本発明品は従来の耐火粘土結合
キャスタブル耐火物の諸欠点を解決し養生強度の高い急
激加熱乾燥を行っても爆裂しない流し込み用キャスタブ
ル耐火物を提供するので、使用骨材として電融アルミナ
、焼結アルミナ、マグネシアクリンカ−１炭化珪素、窒
化珪素質原料等の高耐蝕性の材料を取り入れることによ
り溶融スラグ、溶鋼、溶銑等に直接曝される溶湯容器用
内張りキャスタブル耐火物としての適用が可能である。As shown in the above examples, the product of the present invention solves the various drawbacks of conventional fireclay bonded castable refractories and provides castable refractories for pouring that do not explode even when subjected to rapid heating and drying with high curing strength. By incorporating highly corrosion-resistant materials such as fused alumina, sintered alumina, magnesia clinker-1 silicon carbide, and silicon nitride raw materials, we have created castable fireproof linings for molten metal containers that are directly exposed to molten slag, molten steel, hot metal, etc. It can be applied as a physical object.
Claims (1)
火物１００重量％に対して上記耐火粘土を３〜１２内割
重量％、解膠材を０．０２〜０．５外割重量％、アルミ
ン酸石灰を０．５〜５外割重量％、および純度９０％以
上で、０．０７４ｍｍ以下の粒度の粉末を５０重量％以
上有する金属アルミニウム粉末を０．１〜５．５５外割
重量％添加することを特徴とする各種窯炉、溶湯容器内
張り用不定形耐火物。1. 3 to 12% by weight of the above fireclay and 0.02 to 0.5% by weight of deflocculant to 100% by weight of refractory made by adding fireclay to fireproof aggregate with particle size adjustment %, 0.5 to 5% by weight of lime aluminate, and 0.1 to 5.55% by weight of metallic aluminum powder with a purity of 90% or more and 50% by weight or more of powder with a particle size of 0.074 mm or less. Monolithic refractories for lining various furnaces and molten metal containers, characterized by the addition of % by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55158457A JPS5933549B2 (en) | 1980-11-10 | 1980-11-10 | Monolithic refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55158457A JPS5933549B2 (en) | 1980-11-10 | 1980-11-10 | Monolithic refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5678477A JPS5678477A (en) | 1981-06-27 |
| JPS5933549B2 true JPS5933549B2 (en) | 1984-08-16 |
Family
ID=15672160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55158457A Expired JPS5933549B2 (en) | 1980-11-10 | 1980-11-10 | Monolithic refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933549B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200226A (en) * | 1987-02-16 | 1988-08-18 | Kagetake Toyama | Computer input/output device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984000747A1 (en) * | 1982-08-20 | 1984-03-01 | Morgan Refractories Ltd | A refractory composition |
| US6264859B1 (en) | 1986-10-03 | 2001-07-24 | Ppg Industries Ohio, Inc. | Optically transparent UV-protective coatings |
-
1980
- 1980-11-10 JP JP55158457A patent/JPS5933549B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200226A (en) * | 1987-02-16 | 1988-08-18 | Kagetake Toyama | Computer input/output device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5678477A (en) | 1981-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4120734A (en) | Monolithic refractory compositions | |
| JP5823666B2 (en) | Refractory without cement | |
| US3842760A (en) | Refractory composition and shaped article containing carbon and silicon | |
| JPH07330451A (en) | Thermosetting monolithic refractory and executing method therefor | |
| JPS5933549B2 (en) | Monolithic refractories | |
| US2558782A (en) | Castable refractories | |
| JP2604310B2 (en) | Pouring refractories | |
| JPS5828231B2 (en) | Fluid cast refractories | |
| JPS6241770A (en) | Manufacture of monolithic refractories | |
| JPS63162579A (en) | Thermosettable monolithic refractories | |
| JPH0633179B2 (en) | Irregular refractory for pouring | |
| JPS6049156B2 (en) | Fireproof castable for ladle lining | |
| JPH0794343B2 (en) | Magnesia clinker and method for producing the same | |
| JPH0517241A (en) | Aluminous castable refractory | |
| JPH06199575A (en) | Alumina-spinel castable refractory | |
| JPS6071569A (en) | Novel monolithic refractory mixture and binder therefor | |
| JPS6140622B2 (en) | ||
| JP2009298633A (en) | Casting monolithic refractory | |
| JPS5926979A (en) | Basic indefinite form refractories for molten metal vessel | |
| SU1175922A1 (en) | Refractory material | |
| JPS6096579A (en) | Dilatant flowable castable | |
| CA1097698A (en) | Monolithic refractory compositions | |
| JP3426024B2 (en) | Construction method of refractory construction body | |
| RU2003936C1 (en) | Fire-resistant moulding mass | |
| JPS5855368A (en) | Phosphate bonded silicic refractory castable |