JP2959848B2 - Coating material for carbon-containing refractories - Google Patents
Coating material for carbon-containing refractoriesInfo
- Publication number
- JP2959848B2 JP2959848B2 JP40849990A JP40849990A JP2959848B2 JP 2959848 B2 JP2959848 B2 JP 2959848B2 JP 40849990 A JP40849990 A JP 40849990A JP 40849990 A JP40849990 A JP 40849990A JP 2959848 B2 JP2959848 B2 JP 2959848B2
- Authority
- JP
- Japan
- Prior art keywords
- coating material
- carbon
- coating
- coke
- brick
- 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
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐火物に関し、特に炭素
含有耐火物の表面に塗布するコーティング材に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory, and more particularly to a coating material applied to the surface of a carbon-containing refractory.
【０００２】[0002]
【従来の技術】転炉、溶鋼鍋等の溶融金属容器の内張り
に多用されているマグネシア−カーボンれんが等の炭素
を含有した塩基性耐火れんがは、一般に高い熱膨張率を
持っており、例えば積み上げられたれんがが炉の稼働時
に膨張して、ついにはれんがが破壊される、いわゆる
「せり割れ」を生じる場合がある。2. Description of the Related Art Basic refractory bricks containing carbon, such as magnesia-carbon bricks, which are frequently used for lining molten metal containers such as converters and molten steel pots, generally have a high coefficient of thermal expansion. The brick may expand during operation of the furnace, eventually causing the so-called "split", which destroys the brick.
【０００３】また、炭素原料を配合した耐火物の表面の
摩擦係数は極めて低く、例えばれんが製造時や築炉作業
時に該耐火物が手から滑り落ちる事故が発生する恐れも
ある。そこで、例えば、特開平１−１７２２８６号公報
では、築炉前に塗布されたコーティング材により該耐火
物表面に該耐火物よりも圧縮強度の低い、所定厚さの被
膜を形成することにより、上記耐火物の熱膨張による体
積の増加分を吸収して、「せり割れ」を防止するととも
に、耐火物表面を粗面化して上記落下事故の防止できる
ようにした発明が開示されている。こうしたコーティン
グ材は、例えばフェノール樹脂、エポキシ樹脂、アクリ
ル樹脂、酢酸ビニル、塩化ビニル等の樹脂に、ピッチパ
ウダー、木屑等の有機顆粒物を配合してなる液状体であ
り、耐火物に塗布して膜厚０．８mm以下の被膜を形成す
るようにしている。[0003] Further, the coefficient of friction of the surface of a refractory containing a carbon material is extremely low. For example, there is a possibility that the refractory may slip off from hands during brick production or furnace construction work. Therefore, for example, in Japanese Patent Application Laid-Open No. 1-172286, by forming a coating film having a lower compressive strength than the refractory and a predetermined thickness on the surface of the refractory with a coating material applied before furnace construction, An invention is disclosed that absorbs an increase in volume due to the thermal expansion of the refractory to prevent "split cracks" and roughen the surface of the refractory to prevent the above-mentioned accident. Such a coating material is, for example, a liquid material in which organic particles such as pitch powder and wood chips are blended with a resin such as phenolic resin, epoxy resin, acrylic resin, vinyl acetate, and vinyl chloride. A coating having a thickness of 0.8 mm or less is formed.
【０００４】[0004]
【発明が解決しようとする課題】ところで一般に炭素原
料を配合した耐火物では該炭素原料が炉の操業中に大気
中の酸素や溶鋼中のＦｅＯ等の酸化物による酸化作用を
受けて稼働面から揮発・消失し、組織脆化を招来して炉
寿命を短縮させる傾向があり、こうしたことを防止する
ためにアルミニウムや金属ケイ素等の易酸化性金属粉末
を所定量配合して炭素原料の酸化を防止することが行わ
れている。In general, refractories containing a carbon material are oxidized by oxygen in the atmosphere and oxides such as FeO in molten steel during the operation of the furnace, so that the operation of the refractory is difficult from the viewpoint of operation. It tends to volatilize / dissipate, leading to tissue embrittlement and shortening the life of the furnace. To prevent this, a predetermined amount of easily oxidizable metal powder such as aluminum or metal silicon is blended to oxidize the carbon raw material. Prevention has been made.
【０００５】ところが上記易酸化性金属粉末を配合する
ことにより、ある炭素含有耐火物では１５００℃で約２
％程度にまで線膨張率が増大することとなり、このよう
な場合、例えば上記特開平１−１７２２８６号公報に記
載のコーティング材では膜厚を０．８mm以下としている
ので該膨張により体積の増大分を吸収できずに「せり割
れ」が発生する恐れがある。[0005] However, by blending the oxidizable metal powder, some carbon-containing refractories have a temperature of about 2 ° C at 1500 ° C.
% In such a case, and in such a case, for example, the coating material described in JP-A-1-172286 has a film thickness of 0.8 mm or less. May not be absorbed and “split cracks” may occur.
【０００６】そこでこうした事態に対応するために、コ
ーティング材による被膜の膜厚を１．５mm程度にまで大
きくすることが行われているが、そのためには該コーテ
ィング材を複数回に分けて塗布する煩雑な工程を必要と
する。さらにその上被膜の膜厚を大きくしすぎると、操
業時の温度にまでれんがが昇温される前の比較的低い温
度域で上記コーティング材による被膜が軟化し始め、積
み上げられたれんが同士が緩み、このときに例えば炉の
傾動動作等を行うと積み上げたれんがの一部が抜け落ち
る事態を生じ、操業時の温度でのれんがの膨張分を勘案
して上記コーティング材による被膜の膜厚を大きくする
ことは困難であることがわかった。こうした事態を少し
でも改善するためにコーティング材に配合する有機顆粒
物に軟化開始温度の高い、例えば３００℃以上の軟化開
始温度をもつ顆粒ピッチを配合することも行われ、該顆
粒ピッチが完全燃焼して消失する温度との温度差を少な
くするようにしたコーティング材も開発されてはいる
が、炭素含有耐火物が高膨張率化する状況の中では、上
記問題点を完全に解決することはできなかった。Therefore, in order to cope with such a situation, the thickness of the film formed by the coating material is increased to about 1.5 mm. For this purpose, the coating material is applied in a plurality of times. A complicated process is required. Furthermore, if the thickness of the upper coating is too large, the coating of the coating material starts to soften in a relatively low temperature range before the brick is heated up to the operating temperature, and the stacked bricks loosen each other. At this time, for example, when a tilting operation of the furnace is performed, a part of the stacked bricks may fall off, and the film thickness of the coating material by the coating material may be increased in consideration of the amount of expansion of the brick at a temperature during operation. That proved difficult. In order to improve such situation as much as possible, it is also possible to mix a granule pitch having a high softening start temperature, for example, a softening start temperature of 300 ° C. or more, with the organic granules to be mixed with the coating material, and the granule pitch is completely burned. Although coating materials have been developed to reduce the temperature difference from the temperature at which they disappear, the above problems cannot be completely solved in a situation where the carbon-containing refractory has a high expansion coefficient. Did not.
【０００７】さらにまた、上記コーティング材によって
形成される被膜は炭素原料を配合したれんが表面の摩擦
係数を一定程度高めるものの、さらにれんがの製造時や
築炉作業時の作業性や安全性の向上のために取り扱いや
すいものとすることが求められている。本発明は上記従
来の事情に鑑みて提案されたものであって、炭素含有耐
火物による施工体の「せり割れ」の発生を抑制するとと
もに、耐火物表面の粗面化を効果的に果たしうるコーテ
ィング材を提供することを目的とするものである。Further, although the coating formed by the above-mentioned coating material enhances the friction coefficient of the surface of the brick containing the carbon raw material to a certain extent, it further improves the workability and safety during the production of the brick and the furnace construction work. Therefore, it is required to be easy to handle. The present invention has been proposed in view of the above-mentioned conventional circumstances, and can suppress the occurrence of “scissors” of a construction body due to a carbon-containing refractory, and can effectively achieve a rough surface of a refractory surface. It is intended to provide a coating material.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は以下の手段を採用する。すなわち、燃焼開
始温度が６００℃以上のコークス粒と、軟化開始温度が
３００℃以上の顆粒ピッチとを、バインダー樹脂液に配
合した炭素含有耐火物用コーティング材である。さらに
望ましくは、粒径１．０mm以下の顆粒ピッチと粒径０．
５〜１．５mmのコークス粒を９５：５〜５０：５０の重
量比率で混合した有機顆粒物を２０〜６０重量％配合
し、残部を液状樹脂とする構成が望ましい。In order to achieve the above object, the present invention employs the following means. That is, it is a coating material for carbon-containing refractories in which coke particles having a combustion start temperature of 600 ° C. or more and granule pitches having a softening start temperature of 300 ° C. or more are blended in a binder resin liquid. More desirably, a granular pitch having a particle diameter of 1.0 mm or less and a particle diameter of 0.1 mm or less.
It is desirable that organic granules obtained by mixing coke granules having a size of 5 to 1.5 mm at a weight ratio of 95: 5 to 50:50 are blended in an amount of 20 to 60% by weight, with the remainder being liquid resin.
【０００９】[0009]
【作 用】上記構成のコーティング材によれば、上記顆
粒ピッチとバインダー樹脂を配合した従来のコーティン
グ材に燃焼開始温度を６００℃以上のコークス粒を配合
することにより、顆粒ピッチが軟化を開始する３００℃
から該コークス粒が燃焼を開始するまでの少なくとも６
００℃までの温度域ではコークス粒が積み上げたれんが
間に残存するので、れんが間に空隙が生じない。According to the coating material having the above-mentioned structure, the granule pitch starts to soften by mixing coke grains having a combustion start temperature of 600 ° C. or more with the conventional coating material in which the above-mentioned granule pitch and a binder resin are blended. 300 ℃
At least 6 until the coke particles start burning.
In the temperature range up to 00 ° C., the bricks in which the coke particles are piled up remain between the bricks, so that no void is generated between the bricks.
【００１０】このことは温度と吸発熱量との関係を示す
図１(a) と温度と重量減少率との関係を示す図１(b) に
おいて顆粒ピッチの特性を示す曲線Ｃ1a、曲線Ｃ1bと、
コークス粒の特性を示す曲線Ｃ2a、曲線Ｃ2bとの差異か
ら明らかであり、特に図１(b) での曲線Ｃ2bよりコーク
ス粒は８００℃付近まで配合した量の半分以上が残存す
ることがわかる。[0010] Curve C 1a showing the characteristics of the granules pitch in FIG. 1 showing the relationship between this temperature and the endothermic and exothermic heat (a) and FIG. 1 showing the relationship between the temperature and the weight loss rate (b), the curve C 1b ,
It is clear from the difference between the curves C 2a and C 2b showing the characteristics of the coke grains. In particular, the curve C 2b in FIG. 1 (b) shows that more than half of the amount of the coke grains mixed up to around 800 ° C. remains. I understand.
【００１１】また、上記コークス粒は圧縮強度が１５０
〜１８０kgｆ／cm2 とれんがの一般的な圧縮強度である
３５０〜８００kgｆ／cm2 よりも小さいため、れんが膨
張時に粉砕されるので、れんがの膨張を十分吸収でき、
「せり割れ」を生じることがないという好適な特性をも
有する。また、該コーティング材の塗布・乾燥後には上
記コークス粒が一様な突起としてれんがの表面に露出す
るので、れんが表面の粗面化を有効に行うことができ
る。The coke grains have a compressive strength of 150.
Smaller than ~180kgf / cm 2 and 350~800kgf / cm 2 which is a general compressive strength of the brick, since it is crushed during brick expansion, it can sufficiently absorb the expansion of the brick,
It also has the preferred property of not causing "cracking". Further, after the application and drying of the coating material, the coke particles are exposed on the surface of the brick as uniform projections, so that the brick surface can be effectively roughened.
【００１２】本発明において、バインダーとしての液状
樹脂としては、合成樹脂、天然樹脂あるいはこれらの混
合物を使用することが可能で、合成樹脂としては例え
ば、フェノール樹脂、エポキシ樹脂、アクリル樹脂、酢
酸ビニル、塩化ビニル等がその例として挙げられ、天然
樹脂としては、バルサム、コロホニウム、ダマール等の
植物性樹脂、あるいはコバール、コハク等の化石樹脂が
その例として挙げられる。In the present invention, a synthetic resin, a natural resin or a mixture thereof can be used as the liquid resin as the binder. Examples of the synthetic resin include a phenol resin, an epoxy resin, an acrylic resin, a vinyl acetate, Examples of the natural resin include vinyl chloride and the like, and examples of the natural resin include vegetable resins such as balsam, colophonium and damar, and fossil resins such as kovar and amber.
【００１３】また、本発明で使用する有機顆粒物は、顆
粒ピッチとコークス粒を混合したものを使用するが、上
記顆粒ピッチとオイルコークス粒を、９５：５〜５０：
５０の範囲の重量比率で混合することが望ましく、コー
クス粒が上記範囲より少なくなると本発明の所期の効果
に乏しくなり、コークス粒が上記範囲より多くするとコ
ーティング材の粘度が過度に高くなって塗布時の作業性
が悪くなるとともに、塗りむらが生じる。As the organic granules used in the present invention, a mixture of granule pitch and coke granules is used.
It is desirable to mix at a weight ratio in the range of 50. If the coke particles are less than the above range, the intended effect of the present invention is poor, and if the coke particles are more than the above range, the viscosity of the coating material becomes excessively high. The workability at the time of coating is deteriorated, and uneven coating occurs.
【００１４】また上記顆粒ピッチとコークス粒の粒径を
各々粒径１．０mm以下、粒径０．５〜１．５mmとするこ
とが望ましく、顆粒ピッチの粒径が大きすぎると塗布時
の作業性が低下し、コークス粒の粒径が上記範囲よりも
小さすぎると一度の塗布作業で形成される被膜の膜厚が
小さくなり複数回の塗布作業を繰り返す必要を生じるの
で好ましくなく、コークス粒の粒径が上記範囲よりも大
きすぎると被膜の膜厚が大きくなり過ぎて低温度域での
れんがの抜け落ちを防止することができなくなる場合が
ある。It is desirable that the particle size of the above-mentioned granule pitch and the coke granules be 1.0 mm or less and 0.5 to 1.5 mm, respectively. If the particle size of the coke particles is too small, the film thickness of the film formed in one application operation becomes small, and it becomes necessary to repeat the application operation a plurality of times. If the particle size is larger than the above range, the thickness of the coating film becomes too large, and it may not be possible to prevent the falling off of the brick in a low temperature range.
【００１５】上記顆粒ピッチとコークス粒の混合物と液
状樹脂の混合割合は、該液状樹脂の粘性に応じて上記混
合物の配合量を２０〜６０重量％の範囲で調整すること
で、１回の塗布作業で望ましい膜厚の被膜を形成するこ
とができるが、顆粒ピッチとコークス粒の混合物が２０
重量％未満とすると、塗布作業時にコーティング材のた
れ落ちが生じ、均一な被膜を形成することができず、６
０重量％を超えるとコーティング材の粘度が過度に高く
なって塗布時の作業性が悪くなるとともに、塗りむらが
生じる。The mixing ratio of the mixture of the granule pitch and coke granules to the liquid resin is adjusted by adjusting the blending amount of the mixture within the range of 20 to 60% by weight according to the viscosity of the liquid resin. Although a film having a desired thickness can be formed by the operation, a mixture of the granular pitch and the coke
If the amount is less than 10% by weight, the coating material will sag during the coating operation, making it impossible to form a uniform film.
If the content exceeds 0% by weight, the viscosity of the coating material becomes excessively high, so that the workability at the time of application is deteriorated and uneven coating is caused.
【００１６】[0016]
【実施例】以下、本発明に関し、実施例を従来例と比較
しながら具体的に説明する。液状樹脂として酢酸ビニル
５０％水溶液５５重量％を用い、軟化開始温度が３００
℃以上、揮発分が３０％以下の平均粒径０．７mmの顆粒
ピッチと揮発分１％以下が燃焼開始温度が６００℃以上
の平均粒径１．２mmのコークス粒を７０：３０でブレン
ドした有機顆粒物４５重量％を上記酢酸ビニル水溶液に
加えて十分に混合し、このコーティング材を炭素原料成
分２０重量％配合した転炉用マグネシア−カーボンれん
がにローラバケで塗布し、その後２００℃で乾燥させて
れんが表面に被膜を形成した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments and comparative examples. A 50% aqueous solution of vinyl acetate (55% by weight) was used as the liquid resin, and the softening start temperature was 300.
A granule pitch having an average particle diameter of 0.7 mm with a volatile content of 30% or less and a volatile content of 30% or less and a coke particle with an average particle size of 1.2 mm and a combustion initiation temperature of 600% or more with a volatile content of 1% or less were blended at 70:30. The organic granules (45% by weight) were added to the above vinyl acetate aqueous solution and mixed well, and the coating material was applied to a magnesia-carbon brick for converter containing 20% by weight of a carbon raw material component with a roller bucket, and then dried at 200 ° C. A coating was formed on the brick surface.
【００１７】また比較例として、上記顆粒ピッチとコー
クス粒とからなる有機顆粒物に代えて、顆粒ピッチ単体
を用いてコーティング材を調製し、実施例と同様の作業
条件でコーティング材による被膜を形成した。 １．コーティング厚みの比較 上記作業後、れんが表面に形成された被膜の平均膜厚は
比較例では１．０mmに対して、本発明に係る実施例では
１．５mmと１回の塗布作業で上記れんが表面に形成でき
る被膜の膜厚が大きくなった。このことはすなわち、同
じ膜厚を形成するためにコーティング材の粘度を小さく
設定することができ、塗布作業の効率を向上することが
できることを示している。As a comparative example, a coating material was prepared by using a granular pitch alone instead of the organic granules composed of the granular pitch and coke particles, and a film was formed by the coating material under the same working conditions as in the example. . 1. Comparison of coating thickness After the above operation, the average film thickness of the film formed on the brick surface was 1.0 mm in the comparative example, and 1.5 mm in the example according to the present invention, and the average thickness of the coating was 1.5 mm in one application operation. The film thickness of the film that can be formed on the substrate was increased. This indicates that the viscosity of the coating material can be set small to form the same film thickness, and the efficiency of the coating operation can be improved.
【００１８】２．すべり防止効果 塗布後のれんが表面を観察すると実施例ではコークス粒
による突起が目立ち、手で触れた場合でも明らかに実施
例は比較例よりも滑りにくくなることがわかった。 ３．実炉使用を想定しての膨張率比較 直径１５mm、高さ２５mmの円柱状に成形した２個の上記
マグネシア−カーボンれんが片の底面同士を上記実施
例、比較例のコーティング材による被膜を介して接触さ
せた２種類の試料を、窒素ガス雰囲気下で０．０１kgｆ
／cm2の荷重を上方からかけて、徐々に昇温させて各温
度下での上記試料の線膨張率の比較を行い、実施例を適
用した試料の線膨張率特性を示す曲線Ｓ1 と比較例を適
用した試料の線膨張率特性を示す曲線Ｓ2 を図２にグラ
フとして示した。特に６００℃までの低温度域において
両曲線Ｓ1 、Ｓ2 を比較すると、曲線Ｓ2 では３００〜
６００℃の温度域で線膨張率の増加が停滞しており、被
膜中の顆粒ピッチが軟化し始め、被膜の膜厚が小さくな
ったことを示しているのに対して、曲線Ｓ1 は上記３０
０〜６００℃の温度域での線膨張率の増加割合の停滞す
る程度が小さく、コークス粒が残存することにより被膜
の膜厚は塗布直後からそれほど変化していないことがわ
かる。2. Slip Prevention Effect Observation of the brick surface after application revealed that protrusions due to coke grains were noticeable in the examples, and that even when touched by hand, the examples were clearly less slippery than the comparative examples. 3. Expansion coefficient comparison assuming use in an actual furnace The bottom surfaces of two magnesia-carbon brick pieces formed into a cylindrical shape having a diameter of 15 mm and a height of 25 mm are interposed between the bottom surfaces of the coating materials of the above-described examples and comparative examples. The two types of samples brought into contact with each other are weighed at 0.01 kgf under a nitrogen gas atmosphere.
/ Load of cm 2 over a period from above, to compare the linear expansion coefficient of the sample under the temperature gradually warmed, and the curve S 1 showing the linear expansion coefficient characteristic of a sample according to the embodiment the curve S 2 showing the linear expansion coefficient characteristic of a sample according to the comparative examples shown graphically in Figure 2. In particular, when comparing the two curves S 1, S 2 in a low temperature range up to 600 ° C., 300 to the curve S 2
And stagnant increase in linear expansion coefficient in a temperature range of 600 ° C., began to granulate the pitch in the coating is softened, while the thickness of the coating is indicated that the smaller, the curve S 1 is the 30
It can be seen that the degree of stagnation of the rate of increase in the coefficient of linear expansion in the temperature range of 0 to 600 [deg.] C. is small, and that the film thickness of the coating film has not changed so much immediately after coating due to the remaining coke particles.
【００１９】それに対して高温度域では両曲線Ｓ1 、Ｓ
2 に顕著な差異は認められず、コーティング材の体積膨
張分を吸収する性能は大差がないことがわかる。このこ
とから、特に６００℃までの低温度域のおいて発生する
被膜の膜厚の減少程度は本発明による実施例の方が小さ
く、該低温度域で発生しがちなれんがの抜け落ちを効果
的に防止することができるとの結論に達した。On the other hand, in the high temperature range, both curves S 1 and S 1
No remarkable difference was observed in 2 , indicating that there is no great difference in the performance of absorbing the volume expansion of the coating material. From this fact, the decrease in the film thickness of the coating film particularly occurring in the low temperature range up to 600 ° C. is smaller in the embodiment according to the present invention, and the brick which tends to occur in the low temperature range is effectively prevented from falling off. We have come to the conclusion that it can be prevented.
【００２０】[0020]
【発明の効果】以上のように、本発明では液状樹脂をバ
インダーとし、軟化開始温度が３００℃以上の顆粒ピッ
チに加えて、燃焼開始温度が６００℃以上のコークス粒
を配合することにより、特に６００℃までの低温度域の
おいて発生する被膜の膜厚の減少程度は本発明による実
施例の方が小さく、該低温度域で発生しがちなれんがの
抜け落ちを効果的に防止することができる。As described above, in the present invention, the liquid resin is used as a binder, and in addition to the granule pitch having a softening start temperature of 300 ° C. or more, coke particles having a combustion start temperature of 600 ° C. or more are blended. In the low temperature region up to 600 ° C., the degree of reduction in the film thickness of the coating film is smaller in the embodiment according to the present invention, and it is possible to effectively prevent the falling off of the brick which tends to occur in the low temperature region. it can.
【００２１】また、本発明ではコークス粒の配合量や粒
径を調製することにより、大きな膜厚を１回の塗布作業
で形成することができ、作業性の向上に寄与するととも
に、配合する易酸化性金属粉末の増量による炭素含有耐
火物の高膨張率化にも対応して施工体に積み上げられた
れんがの体積膨張分を十分に吸収することができ、「せ
り割れ」を防止できるものである。Further, in the present invention, by adjusting the blending amount and the grain size of the coke grains, a large film thickness can be formed by one coating operation, which contributes to improvement of workability and facilitates blending. In response to increasing the expansion rate of carbon-containing refractories by increasing the amount of oxidizable metal powder, it can sufficiently absorb the volume expansion of the bricks piled on the construction body and prevent "split cracks". is there.
【００２２】さらにまた、れんが表面にコークス粒によ
る突起が顕れて粗面化するので、従来よりもれんが製造
時や築炉作業時の滑り止めを充分図ることができ、作業
の安全性を高めることができる。Further, since protrusions due to coke particles appear on the surface of the brick and the surface is roughened, it is possible to more sufficiently prevent slippage during the production of the brick and in the furnace-building work, thereby improving the work safety. Can be.
【図１】顆粒ピッチとコークス粒の温度と吸発熱量との
関係、及び温度と重量減少率との関係を示すグラフであ
る。FIG. 1 is a graph showing the relationship between the temperature of granule pitch and coke granules and the amount of heat generated and absorbed, and the relationship between temperature and the weight loss rate.
【図２】試料の線膨張率特性を示すグラフである。FIG. 2 is a graph showing linear expansion coefficient characteristics of a sample.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 41/83 C04B 41/87 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) C04B 41/83 C04B 41/87
Claims (2)
度が３００℃以上の顆粒ピッチを配合した炭素含有耐火
物用コーティング材において、上記配合に加えて燃焼開
始温度が６００℃以上のコークス粒を配合したことを特
徴とする炭素含有耐火物用コーティング材。1. A coating material for a carbon-containing refractory comprising a liquid resin as a binder and a granular pitch having a softening start temperature of 300 ° C. or more, in which coke granules having a combustion start temperature of 600 ° C. or more are added in addition to the above-mentioned compounding. A coating material for carbon-containing refractories, characterized in that:
０．５〜１．５mmのコークス粒を９５：５〜５０：５０
の重量比率で混合した有機顆粒物を２０〜６０重量％配
合し、残部を液状樹脂とした請求項１に記載の炭素含有
耐火物用コーティング材。2. A granule pitch of 1.0 mm or less and a coke particle of 0.5 to 1.5 mm in particle diameter of 95: 5 to 50:50.
The coating material for carbon-containing refractories according to claim 1, wherein the organic granules mixed at a weight ratio of 20 to 60% by weight are blended, and the remainder is a liquid resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40849990A JP2959848B2 (en) | 1990-12-27 | 1990-12-27 | Coating material for carbon-containing refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40849990A JP2959848B2 (en) | 1990-12-27 | 1990-12-27 | Coating material for carbon-containing refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04228486A JPH04228486A (en) | 1992-08-18 |
| JP2959848B2 true JP2959848B2 (en) | 1999-10-06 |
Family
ID=18517948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40849990A Expired - Lifetime JP2959848B2 (en) | 1990-12-27 | 1990-12-27 | Coating material for carbon-containing refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2959848B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100398828B1 (en) * | 2001-07-06 | 2003-09-19 | 조선내화 주식회사 | Coating material of inorganic particle which forms projecting parts at the surface of refractories or metalcase |
| JP6885238B2 (en) * | 2017-07-12 | 2021-06-09 | 日本製鉄株式会社 | How to operate the blast furnace |
-
1990
- 1990-12-27 JP JP40849990A patent/JP2959848B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04228486A (en) | 1992-08-18 |
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