JPH10183134A - Coke furnace - Google Patents
Coke furnaceInfo
- Publication number
- JPH10183134A JPH10183134A JP28731597A JP28731597A JPH10183134A JP H10183134 A JPH10183134 A JP H10183134A JP 28731597 A JP28731597 A JP 28731597A JP 28731597 A JP28731597 A JP 28731597A JP H10183134 A JPH10183134 A JP H10183134A
- Authority
- JP
- Japan
- Prior art keywords
- glaze
- weight
- refractory
- furnace
- coke oven
- 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.)
- Granted
Links
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コークス炉に関する。
詳しくは、石炭乾留に際して生成するガス、タール等の
熱分解によって発生するカーボンが炉内壁面に付着する
のを防止する緻着で耐久性のある釉層を、熱間施工また
は冷間施工で炉内壁面に溶着形成したコークス炉に関す
る。The present invention relates to a coke oven.
For more details, a dense and durable glaze layer that prevents carbon generated by pyrolysis of gas, tar, etc. generated during coal carbonization from adhering to the furnace inner wall is applied to the furnace by hot or cold construction. The present invention relates to a coke oven formed by welding on an inner wall surface.
【０００２】[0002]
【従来の技術】コークス炉は、石炭を約１１００℃で２
０〜２５時間蒸焼（乾留）することによってコークスを
製造する。この石炭の乾留過程でタール状物質や炭化水
素のガスが発生する。これらはコークス炉内壁、炉蓋、
石炭投入口等の隙間や、炉体耐火物の開口気孔に侵入、
熱分解炭化して強固なカーボンの付着物を形成する。2. Description of the Related Art A coke oven produces coal at about 1100.degree.
Coke is produced by steaming (dry distillation) for 0 to 25 hours. Tar-like substances and hydrocarbon gases are generated during the coal distillation process. These are the coke oven wall, furnace lid,
Intrusion into gaps such as coal inlets and open pores of furnace refractories,
Pyrolytic carbonization to form strong carbon deposits.
【０００３】このカーボン付着物は耐火物の融点を低下
させ、かつ耐火物の脆化の原因となる。また堆積するカ
ーボン付着物のために炉蓋の開閉が困難になり、かつ炉
蓋のコークス炉に対する密封性を悪くする。このため付
着したカーボンを機械的に除去することも行われている
が、付着が強固なため、除去作業に長時間かかり、作業
環境も劣悪である。さらに除去作業中に、耐火物自体の
表面が削り取られることもある。別の方法として、空気
または酸素ガスを吹き込んで付着カーボンの焼落としを
行っているが、この方法では作業範囲は炉口近傍に限ら
れてしまう。炉の全域を清掃するためには、炉の操業を
中断し、炉を空窯状態にして焼落としせねばならない。
しかし焼落とし作業自体苛酷な高熱作業であるととも
に、焼落とし時の燃焼熱は炉体の耐火物に対して局部的
な高熱状態をもたらし、炉体損傷の原因ともなる。また
コークス炉は、長期の使用によって、たとえば目地切れ
などが発生する。[0003] The carbon deposits lower the melting point of the refractory and cause embrittlement of the refractory. In addition, the carbon fouling deposits make it difficult to open and close the furnace lid, and deteriorate the hermetic sealing of the furnace lid to the coke oven. For this reason, the adhered carbon is mechanically removed, but the adherence is so strong that the removal operation takes a long time and the working environment is poor. Further, during the removal operation, the surface of the refractory itself may be scraped off. As another method, air or oxygen gas is blown to burn off adhered carbon. However, in this method, the working range is limited to the vicinity of the furnace port. To clean the entire area of the furnace, the furnace must be shut down and the furnace left empty to burn down.
However, the burn-down operation itself is a severe high-temperature operation, and the combustion heat generated during the burn-down causes a local high-temperature state to the refractory of the furnace body, which may cause damage to the furnace body. In addition, a coke oven, for example, is subject to joint breakage due to long-term use.
【０００４】このような状況に対し、従来よりカーボン
の付着しにくい耐火物や耐火物表面を、カーボンの付着
し難いコーティング膜で被覆することおよび目地切れな
どを補修する方法について種々検討されてきた。たとえ
ば、 特公昭６２−１９４７７：炭化ケイ素、窒化珪素また
は黒鉛粒子と無機結合剤とから成る組成物をコークス炉
内の内張り煉瓦上に塗布する。 特開昭６２−１９７３７１：炭化ケイ素、窒化ケイ素
などから成る耐熱性およびタール性物質浸透防止性付与
剤と、リン酸塩、酸化イットリウムなどから成るバイン
ダーと、チタン酸カリウム繊維から成る断熱性付与剤と
をコークス炉の内壁面に塗布する。 特公昭６３−４０４６３：黒鉛粉末とコロイダルシリ
カ、アルミナゾルなどの無機バインダーをコークス炉の
ドア用内張耐火物に塗布する。 特開昭６３−２３６７８３：釉薬と煉瓦を同時焼成し
釉層が形成されたコークス炉用耐火煉瓦を製造する。[0004] In order to cope with such a situation, various studies have been made on a method of coating a refractory or a surface of a refractory to which carbon is unlikely to adhere with a coating film to which carbon is unlikely to adhere, and a method of repairing joint breaks. . For example, Japanese Patent Publication No. 62-19777: A composition comprising silicon carbide, silicon nitride or graphite particles and an inorganic binder is applied to a lining brick in a coke oven. JP-A-62-197371: A heat-resistant and tar-based substance permeation preventive agent made of silicon carbide, silicon nitride, or the like, a binder made of phosphate, yttrium oxide, or the like, and a heat-insulating agent made of potassium titanate fiber Is applied to the inner wall surface of the coke oven. JP-B-63-40463: A graphite powder and an inorganic binder such as colloidal silica and alumina sol are applied to a lining refractory for a door of a coke oven. JP-A-63-236783: Simultaneously firing a glaze and a brick to produce a refractory brick for a coke oven having a glaze layer formed thereon.
【０００５】前記の方法のうち、炭化ケイ素、窒化ケイ
素または黒鉛などを使用する，，の方法は、これ
らの粒子とバインダーの馴染みが悪く、密着強度が不充
分で、操業中被覆層が剥離脱落するという問題がある。[0005] Among the above-mentioned methods, the method using silicon carbide, silicon nitride or graphite, etc., has poor adhesion between the particles and the binder, has insufficient adhesion strength, and the coating layer peels off during operation. There is a problem of doing.
【０００６】の釉層を形成した煉瓦を用いる方法は、
密着性が良好で操業中脱落することもない。また釉層被
膜中の気孔もほとんどないため、カーボンが浸透するこ
ともなく非常に効果的な方法である。しかしながら、コ
ークス炉または炉蓋などを新たに製作する場合、この方
法が適用可能であるが、炉を操業しながら、炉の耐火物
表面に釉層を形成することは不可能である。[0006] The method of using a brick on which a glaze layer is formed is as follows.
It has good adhesion and does not fall off during operation. Further, since there are almost no pores in the glaze layer coating, carbon is not penetrated, and this is a very effective method. However, when a coke oven or a furnace lid is newly manufactured, this method can be applied, but it is impossible to form a glaze layer on the surface of the refractory of the furnace while operating the furnace.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、前記の問題
点に鑑みて成されたものであり、コークス炉等の炉内壁
面に、釉薬を熱間または冷間で施工し、壁面耐火物上に
緻密で耐久性のある釉層を溶着形成させ、釉層によって
カーボンの付着防止、あるいは付着しても容易に剥離さ
せることができ、かつ目地切れなどを補修したコークス
炉を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a glaze is applied hot or cold to a furnace inner wall of a coke oven or the like to obtain a refractory material for a wall. A coke oven with a dense and durable glaze layer deposited on it to prevent the adhesion of carbon by the glaze layer or to easily peel off even if it adheres, and to repair joint breaks etc. Aim.
【０００８】[0008]
【課題を解決するための手段】本発明は、釉層を形成す
る組成として、酸化物換算で、Ｒ2Ｏ（ＲはＮａまたは
Ｋを表す、以下同じ）が１０〜４０重量％と、残部にＳ
ｉＯ2 とを含み、かつ釉の融点が９００℃以下である釉
薬を炉内耐火物表面に熱間塗布して釉層を炉内耐火物表
面に溶着形成したことを特徴とするコークス炉である。According to the present invention, as a composition for forming a glaze layer, R 2 O (R represents Na or K, the same applies hereinafter) is 10 to 40% by weight in terms of oxide, and the balance is To S
A coke oven characterized in that a glaze containing iO 2 and having a melting point of 900 ° C. or less is hot-coated on the surface of the refractory in the furnace to form a glaze layer on the surface of the refractory in the furnace. .
【０００９】また本発明は、釉層を形成する組成とし
て、酸化物換算で、Ｒ2Ｏが１０〜４０重量％と、残部
にＳｉＯ2 とを含み、かつ釉の融点が９００℃以下であ
る釉薬を炉内耐火物表面に冷間塗布後、操業温度以下で
釉薬を炉内耐火物表面に溶着形成したことを特徴とする
コークス炉である。In the present invention, the composition for forming the glaze layer contains, as oxides, 10 to 40% by weight of R 2 O, the balance being SiO 2 , and the melting point of the glaze is 900 ° C. or less. A coke oven characterized in that glaze is cold-coated on the surface of the refractory in the furnace, and then the glaze is deposited on the surface of the refractory in the furnace at an operating temperature or lower.
【００１０】本発明者らは、多様な金属酸化物の組合せ
について、酸化珪素と共に用いた場合の釉薬としての利
用可能性を試験し、９００℃以下の温度で溶融し、溶融
後成分の一部が揮散または拡散して、その融点が上昇
し、コークス炉の操業温度で溶融しない金属酸化物をみ
つけ本発明を完成した。The present inventors have tested the availability of various metal oxide combinations as glazes when used with silicon oxide, and melted at a temperature of 900 ° C. or less, and some of the components after melting. Volatilized or diffused to increase the melting point, and found a metal oxide that did not melt at the operating temperature of the coke oven, and completed the present invention.
【００１１】本明細書中で釉薬とは、コークス炉体を構
成する耐火物の表面に塗布される状態の薬剤を指す。施
工後各々酸化物に変換される金属塩あるいは金属化合物
と珪酸化合物とを含有すればよく、必ずしも前記酸化物
を施工前から含む必要はない。In the present specification, the glaze refers to a chemical applied to the surface of the refractory constituting the coke oven body. It is sufficient that the metal oxide contains a metal salt or a metal compound which is converted into an oxide after the application and a silicate compound, and it is not always necessary to include the oxide before the application.
【００１２】本発明に従えば、釉薬はＲ2Ｏを１０〜４
０重量％と残部にＳｉＯ2とを含む。Ｒ2Ｏは、Ｎａ2Ｏ
またはＫ2Ｏから成り、両者の混合物であってもよい。
Ｒ2Ｏが１０重量％未満では、釉薬の融点が９００℃以
下にならず、またこれが４０重量％を超えると、融点が
低くなりすぎ、施工後の融点上昇に時間がかかり、鉛直
面に塗布された場合に垂下がり現象を起こす。さらに釉
層からの揮散物が増加し、緻密な釉層ができない。According to the present invention, the glaze comprises R 2 O of 10-4.
It contains 0% by weight and the balance SiO 2 . R 2 O is Na 2 O
Alternatively, it may be composed of K 2 O, and may be a mixture of both.
If the content of R 2 O is less than 10% by weight, the melting point of the glaze will not be 900 ° C. or less. When it is done, it causes a drooping phenomenon. Furthermore, the amount of volatiles from the glaze layer increases, and a dense glaze layer cannot be formed.
【００１３】前記酸化物に変換される適当な前駆体とし
て、同一の金属の水酸化物、炭酸塩、硝酸塩、燐酸塩、
硫酸塩、塩化物等が挙げられる。前駆体は施工後、好ま
しくは約６００℃以上の温度で酸化物に変換されるもの
であればよい。Suitable precursors to be converted to the oxides include hydroxides, carbonates, nitrates, phosphates of the same metal,
Sulfate, chloride and the like can be mentioned. The precursor can be converted to an oxide after application, preferably at a temperature of about 600 ° C. or higher.
【００１４】Ｎａ2Ｏの前駆体としては、水酸化ナトリ
ウム、炭酸ナトリウム、炭酸水素ナトリウム、硝酸ナト
リウム、燐酸ナトリウム、硫酸ナトリウム、塩化ナトリ
ウム、珪酸ナトリウムなどが好ましい。As the precursor of Na 2 O, sodium hydroxide, sodium carbonate, sodium hydrogen carbonate, sodium nitrate, sodium phosphate, sodium sulfate, sodium chloride, sodium silicate and the like are preferable.
【００１５】Ｋ2Ｏの前駆体としては、水酸化カリウ
ム、炭酸カリウム、炭酸水素カリウム、硝酸カリウム、
燐酸カリウム、硫酸カリウム、塩化カリウム、珪酸カリ
ウムなどが好ましい。As precursors of K 2 O, potassium hydroxide, potassium carbonate, potassium hydrogen carbonate, potassium nitrate,
Potassium phosphate, potassium sulfate, potassium chloride, potassium silicate and the like are preferred.
【００１６】本発明の釉薬をコークス炉内壁面を構成す
る耐火物表面に施工するためには、釉薬を所定面にはけ
もしくはこてで塗布または吹付け等の標準的な塗布方法
を用いる。したがって、耐火物表面に均一に施工するに
は、釉薬は水溶液あるいは水溶液に近いスラリー状にさ
れることが望ましい。前記の金属塩および金属化合物
は、ほとんど水溶性であり、金属を所望の組成比に、水
溶液中で容易に調製できる。珪酸の前躯体は、後述のも
のであり、これには水に不溶または難溶のものもある
が、水に不溶のものは微粉砕し、水中に分散させてスラ
リー状として使用する。In order to apply the glaze of the present invention to the surface of the refractory constituting the inner wall of the coke oven, a standard application method such as applying or spraying the glaze on a predetermined surface with a brush or a trowel is used. Therefore, in order to apply the glaze uniformly on the surface of the refractory, the glaze is desirably made into an aqueous solution or a slurry close to the aqueous solution. The above-mentioned metal salts and metal compounds are almost water-soluble, and the metal can be easily prepared in a desired composition ratio in an aqueous solution. The precursor of silicic acid is described below. Some of them are insoluble or hardly soluble in water, but those insoluble in water are finely pulverized, dispersed in water and used as a slurry.
【００１７】施工する水溶液中の金属酸化物換算の固形
分濃度は通常約５〜約５０重量％、好ましくは約１０〜
約４０重量％に調整する。濃度が約５０重量％以上にな
ると、施工時熱によりゲル化が起こりやすく、吹付けノ
ズルの目詰まりが発生する。また約５重量％以下になる
と、充分な被膜を形成するには大量の組成物水溶液が必
要になり施工の効率が悪くなる。釉層の厚みには特に制
限はないが、実用的には約３ｍｍ以下でよい。The concentration of solids in terms of metal oxide in the aqueous solution to be applied is usually about 5 to about 50% by weight, preferably about 10 to about 50% by weight.
Adjust to about 40% by weight. When the concentration is about 50% by weight or more, gelation is likely to occur due to heat during construction, and the spray nozzle is clogged. On the other hand, when the content is less than about 5% by weight, a large amount of the aqueous solution of the composition is required to form a sufficient film, and the efficiency of construction is reduced. The thickness of the glaze layer is not particularly limited, but may be practically about 3 mm or less.
【００１８】コークス炉に釉薬を塗布するのは、釉薬の
融点近くの高温で行っても、１００℃以下の低温で行っ
てもよい。高温で行う場合は（熱間塗布）は、塗布され
た時点で水分が蒸発し、釉薬が耐火物表面で一旦溶融
し、塗布された耐火物表面に均一で緻密なガラス質の釉
層を形成する。溶融した釉層は、高粘度であり、鉛直な
面に塗布されても短時間で垂下がることはない。釉層
は、時間の経過とともに融点が上昇し、コークス炉の操
業温度以上となるので、堅固な被膜となり再び溶融する
ことはない。The glaze may be applied to the coke oven at a high temperature near the melting point of the glaze or at a low temperature of 100 ° C. or less. When performing at high temperature (hot application), the moisture evaporates at the time of application, and the glaze once melts on the surface of the refractory, forming a uniform and dense glassy glaze layer on the surface of the applied refractory. I do. The melted glaze layer has a high viscosity and does not hang down in a short time even when applied to a vertical surface. Since the melting point of the glaze layer increases with time and becomes higher than the operating temperature of the coke oven, the glaze layer becomes a firm film and does not melt again.
【００１９】低温で行う場合（低温塗布）は、塗布後コ
ークス炉が昇温され、まず水分が蒸発し、次いで釉薬の
溶融温度で釉薬が溶融して耐火物表面に均一で緻密な釉
層が形成され、コークス炉の操業温度に昇温されるまで
の間に、釉層の融点が上昇し、堅固な釉層被膜を形成す
る。In the case of performing the coating at a low temperature (low temperature coating), the temperature of the coke oven is increased after the coating, first, the moisture is evaporated, and then the glaze is melted at the melting temperature of the glaze to form a uniform and dense glaze layer on the surface of the refractory. The melting point of the glaze layer increases during the period until the temperature is raised to the operating temperature of the coke oven, and a firm glaze layer film is formed.
【００２０】低温塗布は、よい作業環境で行えるので、
完全な塗布ができるが、コークス炉の操業を一時停止せ
ねばならず、大規模な補修に適する。高温塗布は、コー
クス炉の操業を停止せずに行えるので小規模な補修に適
する。Since low-temperature coating can be performed in a good working environment,
Complete application is possible, but coke oven operation must be suspended, making it suitable for large-scale repairs. High-temperature coating is suitable for small-scale repairs because it can be performed without stopping the operation of the coke oven.
【００２１】本発明において、釉薬の融点が施工後、上
昇する理由は、組成物中の成分の一部が時間とともに揮
散または拡散するためと考えられる。この機構の詳細
は、本発明を限定するものではないが、Ｒ2ＯがＳｉＯ2
と共存すると、融点（ＳｉＯ2単独なら１７２８℃）を
著しく降下させる。これらアルカリ金属酸化物は拡散係
数が大きくまた蒸気圧も比較的高いため、施工後、時間
の経過とともに拡散、揮散し釉層の組成がＳｉＯ2 膜に
近づき、その結果融点が上昇する。In the present invention, the reason why the melting point of the glaze rises after the application is considered to be that some of the components in the composition volatilize or diffuse with time. Details of this mechanism, without limiting the present invention, R 2 O is SiO 2
Coexistence significantly lowers the melting point (1728 ° C. for SiO 2 alone). Since these alkali metal oxides have a large diffusion coefficient and a relatively high vapor pressure, they diffuse and volatilize over time after application, and the composition of the glaze layer approaches the SiO 2 film, and as a result, the melting point increases.
【００２２】また本発明は、前記釉薬が、酸化物換算
で、０〜１０重量％のＬｉ2Ｏと０〜１０重量％のＢ2Ｏ
3とを含むことを特徴とする。In the present invention, the glaze is preferably composed of 0 to 10% by weight of Li 2 O and 0 to 10% by weight of B 2 O in terms of oxide.
3 is included.
【００２３】また本発明は、前記釉薬が、酸化物換算
で、０．２〜１０重量％のＬｉ2Ｏおよび／または０．
５〜１０重量％のＢ2Ｏ3とを含むことを特徴とする。In the present invention, the glaze is preferably 0.2 to 10% by weight of Li 2 O and / or 0.1% by weight of oxide.
Characterized in that it comprises a 5-10 wt% of B 2 O 3.
【００２４】本発明に用いる釉薬は、酸化物基準で、Ｌ
ｉ2Ｏ、０〜約１０重量％と、Ｂ2Ｏ3 、０〜約１０重量
％とを含むことが好ましい。さらにＬｉ2Ｏ、０．２〜
約１０重量％および／またはＢ2Ｏ3、０．５〜約１０重
量％を含むことが特に好ましい。The glaze used in the present invention is based on oxides,
i 2 O, 0 to about 10 wt%, B 2 O 3, preferably includes a 0 to about 10 wt%. Further, Li 2 O, 0.2 to
About 10 wt% and / or B 2 O 3, it is particularly preferred to include about 10 wt% 0.5.
【００２５】したがって、釉薬の組成として、前記Ｒ2
Ｏ、１０〜４０重量％および残部がＳｉＯ2からなる基
本組成のものの他に、第１の好適な釉薬の組成として、
Ｌｉ2Ｏ、０．２〜１０重量％、Ｒ2Ｏ、１０〜４０重量
％および残部がＳｉＯ2からなるものと、第２の好適な
釉薬の組成として、Ｂ2Ｏ3、０．５〜１０重量％、Ｒ2
Ｏ、１０〜４０重量％および残部がＳｉＯ2からなるも
のと、第３の好適な釉薬の組成として、Ｌｉ2Ｏ、０．
２〜１０重量％、Ｂ2Ｏ3 、０．５〜１０重量％、Ｒ
2Ｏ、１０〜４０重量％および残部がＳｉＯ2からなるも
のとがある。Therefore, as the composition of the glaze, the above R 2
O, in addition to 10 to 40 wt% and the balance as the basic composition consisting of SiO 2, the composition of a first preferred glaze,
Li 2 O, 0.2 to 10% by weight, R 2 O, 10 to 40% by weight and the balance being SiO 2 , and B 2 O 3 , 0.5 to 10% by weight, R 2
O, 10 to 40% by weight, with the balance being SiO 2, and a third suitable glaze composition, Li 2 O, 0.
2-10 wt%, B 2 O 3, 0.5~10 wt%, R
2 O, 10 to 40% by weight, with the balance being SiO 2 .
【００２６】Ｌｉ2Ｏ，Ｂ2Ｏ3は、釉薬の融点を下げる
のに効果があり、また釉層が形成された後、昇温によっ
て揮散しやすい。Ｌｉ2Ｏ，Ｂ2Ｏ3の割合が１０重量％
を超えると、融点が低くなり過ぎ好ましくない。Li 2 O and B 2 O 3 are effective in lowering the melting point of the glaze, and are easily volatilized by increasing the temperature after the glaze layer is formed. Li 2 O, B 2 O 3 ratio of 10% by weight
If it exceeds, the melting point becomes too low, which is not preferred.
【００２７】本発明に用いる釉薬の融点は、実炉温度以
下で、炉内壁耐火物の周辺部を考慮して約９００℃以下
に設定する必要がある。融点を設定値以下になるよう
に、組成物の成分比を適宜調整することも本発明の一態
様である。具体的には、Ｌｉ2Ｏ−Ｎａ2Ｏ−ＳｉＯ2 の
三成分系の場合、その状態図（たとえば、F.C.Kracek，
J.Am.Chem.Soc.，61,2871（1939）を参照）から融点９
００℃以下の適当な領域で各成分の重量％を求め、所望
の成分比を与えるよう、Ｌｉ2Ｏ，Ｎａ2Ｏ，ＳｉＯ2 の
前駆体を各々規定量混合し、本発明の釉薬を得ることが
できる。The melting point of the glaze used in the present invention must be set at a temperature not higher than the actual furnace temperature and about 900 ° C. or less in consideration of the peripheral portion of the refractory on the inner wall of the furnace. It is also one embodiment of the present invention to appropriately adjust the component ratio of the composition so that the melting point is equal to or lower than the set value. Specifically, in the case of a ternary system of Li 2 O—Na 2 O—SiO 2 , the state diagram (for example, FCKracek,
J. Am. Chem. Soc., 61,2871 (1939)).
The weight percent of each component is determined in an appropriate region of 00 ° C. or lower, and precursors of Li 2 O, Na 2 O, and SiO 2 are mixed in specified amounts so as to give a desired component ratio, thereby obtaining a glaze of the present invention. be able to.
【００２８】Ｌｉ2Ｏ，Ｂ2Ｏ3は、Ｒ2Ｏと同じく前駆体
の形で水溶液またはスラリーとして釉薬に用いられる。
Ｌｉ2Ｏの前駆体としては、水酸化リチウム、炭酸リチ
ウム、炭酸水素リチウム、硝酸リチウム、燐酸リチウ
ム、硫酸リチウム、塩化リチウム、珪酸リチウムなどが
好ましい。Ｂ2Ｏ3の前駆体としては、ホウ酸、ホウ酸ナ
トリウム、ホウ酸カリウムなどが好ましい。[0028] Li 2 O, B 2 O 3 is used to glaze as an aqueous solution or slurry in the form of R 2 O and also precursors.
As the precursor of Li 2 O, lithium hydroxide, lithium carbonate, lithium hydrogen carbonate, lithium nitrate, lithium phosphate, lithium sulfate, lithium chloride, lithium silicate and the like are preferable. As a precursor of B 2 O 3 , boric acid, sodium borate, potassium borate and the like are preferable.
【００２９】また本発明は、釉層を形成する組成とし
て、酸化物換算で、０〜１０重量％のＬｉ2Ｏと、０〜
１０重量％のＢ2Ｏ3 と、１０〜４０重量％のＲ2Ｏ（Ｒ
はＮａまたはＫを表す）と、残部にＳｉＯ2 とを含み、
かつ融点が９００℃以下の組成物１００重量部に対し、
熱膨張率調整剤を１００重量部以下添加して成る釉薬を
炉内耐火物表面に熱間塗布して釉層を炉内耐火物表面に
溶着形成したことを特徴とするコークス炉である。Further, the present invention provides a composition for forming a glaze layer, which is composed of 0 to 10% by weight of Li 2 O in terms of oxide,
10% by weight of B 2 O 3 and 10 to 40% by weight of R 2 O (R
Represents Na or K) and the balance SiO 2 ,
And 100 parts by weight of a composition having a melting point of 900 ° C. or less,
A coke oven characterized in that a glaze obtained by adding not more than 100 parts by weight of a coefficient of thermal expansion is hot-coated on the surface of the refractory in the furnace to form a glaze layer on the surface of the refractory in the furnace.
【００３０】また本発明は、釉層を形成する組成とし
て、酸化物換算で、０〜１０重量％のＬｉ2Ｏと、０〜
１０重量％のＢ2Ｏ3 と、１０〜４０重量％のＲ2Ｏ（Ｒ
はＮａまたはＫを表す）と、残部にＳｉＯ2 とを含み、
かつ融点が９００℃以下の組成物１００重量部に対し、
熱膨張率調整剤を１００重量部以下添加して成る釉薬を
炉内耐火物表面に冷間塗布後、操業温度以下で釉層を炉
内耐火物表面に溶着形成したことを特徴とするコークス
炉である。Further, according to the present invention, as a composition for forming a glaze layer, Li 2 O of 0 to 10% by weight in terms of oxide,
10% by weight of B 2 O 3 and 10 to 40% by weight of R 2 O (R
Represents Na or K) and the balance SiO 2 ,
And 100 parts by weight of a composition having a melting point of 900 ° C. or less,
A coke oven characterized in that a glaze comprising a thermal expansion coefficient adjusting agent in an amount of 100 parts by weight or less is cold-coated on the surface of the refractory in the furnace, and then a glaze layer is formed on the surface of the refractory in the furnace at an operating temperature or lower. It is.
【００３１】また本発明は、前記熱膨張調整剤が、Ａｌ
2Ｏ3、ＭｇＯ、ＣａＯ、ＺｒＯ2およびＴｉＯ2 から成
る群から選ばれる１種以上であることを特徴とする。Further, in the present invention, the thermal expansion modifier may be Al
It is characterized by being at least one selected from the group consisting of 2 O 3 , MgO, CaO, ZrO 2 and TiO 2 .
【００３２】本発明に従えば、Ｒ2ＯなどとＳｉＯ2とか
ら成る前記の釉薬組成物に適当な熱膨張率調整剤が添加
される。以下、熱膨張率調整剤の添加された釉薬を改善
釉薬と呼称する。コークス炉の炉内温度は操業によって
上下する場合があり、耐火物と釉層との熱膨張率差が大
きいと釉層にクラック等が発生し、被膜のカーボン付着
防止効果が劣化することがしばしば起こる。そこで、釉
層と耐火物の馴染みをよくするため、熱膨張率調整剤を
釉薬組成物に所定量加える。熱膨張率調整剤としては、
耐火物と同一または同種のものがよく、特に好ましくは
Ａｌ2Ｏ3、ＭｇＯ、ＣａＯ、ＺｒＯ2およびＴｉＯ2から
成る群より選ばれる１種または２種以上が使用できる。
使用量は、釉薬組成物１００重量部に対し、熱膨張率調
整剤１００重量部以下である。熱膨張率調整剤が釉薬を
施工したとき、釉層の中で一体化し良好な被膜を形成す
るためには、前記の範囲が好ましい。According to the present invention, a suitable thermal expansion regulator is added to the glaze composition comprising R 2 O or the like and SiO 2 . Hereinafter, the glaze to which the thermal expansion coefficient adjusting agent is added is referred to as an improved glaze. The temperature inside the coke oven may fluctuate depending on the operation.If the difference in the coefficient of thermal expansion between the refractory and the glaze layer is large, cracks and the like occur in the glaze layer, often deteriorating the carbon adhesion prevention effect of the coating. Occur. Therefore, in order to improve the familiarity between the glaze layer and the refractory, a predetermined amount of a thermal expansion coefficient adjusting agent is added to the glaze composition. As the thermal expansion coefficient adjusting agent,
The same or the same type as the refractory is preferable, and one or more types selected from the group consisting of Al 2 O 3 , MgO, CaO, ZrO 2 and TiO 2 can be particularly preferably used.
The amount used is 100 parts by weight or less of the thermal expansion coefficient adjusting agent with respect to 100 parts by weight of the glaze composition. When the thermal expansion coefficient adjusting agent is applied to the glaze, the above range is preferable in order to integrate the glaze layer and form a good coating.
【００３３】施工に際しては、釉薬組成物に熱膨張率調
整剤（通常固体粉末）を添加し、スラリー状にし、熱膨
張率調整剤を加えない釉薬と同様に熱間または冷間で耐
火物表面に塗布する。At the time of construction, a thermal expansion coefficient adjusting agent (usually a solid powder) is added to the glaze composition to form a slurry, and the surface of the refractory can be heated or cold as in the case of the glaze without the thermal expansion coefficient adjusting agent. Apply to.
【００３４】熱膨張率調整剤は概して融点が高く、全体
が速やかに一体化すると改善釉薬が高融点化し、９００
℃以下の温度で釉層の被膜形成が困難となる。しかし、
一方高融点のため、熱膨張率調整剤の自己拡散係数が小
さい。このため固体粉末で添加しておくとまず固体粉末
以外の部分が溶融し、固体粉末自身が釉層の中に包み込
まれた形で皮膜が形成する。その後時間とともに固体粉
末の成分が拡散し全体として一体化した皮膜となり、熱
膨張係数が調整された釉層を得ることができる。この改
善釉薬を使用すると釉層の剥離がおこりにくく、カーボ
ン付着防止効果も一段と助長される。The thermal expansion coefficient adjusting agent generally has a high melting point.
When the temperature is lower than ℃, it is difficult to form a glaze layer. But,
On the other hand, due to its high melting point, the coefficient of thermal expansion has a small self-diffusion coefficient. Therefore, if the solid powder is added, portions other than the solid powder are first melted, and a film is formed in a form in which the solid powder itself is wrapped in the glaze layer. Thereafter, the components of the solid powder are diffused with time to form an integrated film as a whole, and a glaze layer having a controlled thermal expansion coefficient can be obtained. When this improved glaze is used, peeling of the glaze layer is less likely to occur, and the effect of preventing carbon adhesion is further promoted.
【００３５】改善釉薬中の構成粒子の粒径は特に制限は
ないが、粒径が大きくなりすぎると施工しにくく、また
小さくなりすぎると施工後、収縮が大きく被膜の亀裂が
起こる。したがって、実用的には、約０．５〜約５０μ
ｍ程度の範囲が好ましい。The particle size of the constituent particles in the improved glaze is not particularly limited. However, if the particle size is too large, it is difficult to perform the application, and if the particle size is too small, shrinkage is large after application and the coating cracks. Therefore, practically, about 0.5 to about 50 μm
A range of about m is preferable.
【００３６】また本発明は、前記ＳｉＯ2を形成する化
合物が、珪酸ナトリウム、珪酸カリウムおよび珪酸リチ
ウムから成る群から選ばれる１種以上ならびにアルカリ
シリコネートから成ることを特徴とする。Further, the present invention is characterized in that the compound forming SiO 2 comprises at least one selected from the group consisting of sodium silicate, potassium silicate and lithium silicate, and an alkali siliconate.
【００３７】また本発明は、前記アルカリシリコネート
が、ナトリウムメチルシリコネートであり、かつ前記Ｓ
ｉＯ2 を形成する化合物がナトリウムメチルシリコネー
トをＣＨ3ＳｉＯ1.5基準で２〜３０重量％含むことを特
徴とする。In the present invention, the alkali siliconate is sodium methylsiliconate, and
The compound forming iO 2 contains 2 to 30% by weight of sodium methylsiliconate based on CH 3 SiO 1.5 .
【００３８】本発明に従えば、ＳｉＯ2を形成する化合
物（ＳｉＯ2前駆体）としては、前記のものが好まし
い。またアルカリシリコネートとしてナトリウムメチル
シリコネートが特に好ましく、これがＣＨ3ＳｉＯ1.5基
準でＳｉＯ2を形成する化合物の２〜３０重量％含まれ
るものが特に好ましい。According to the invention, as the compound for forming the SiO 2 (SiO 2 precursor), the foregoing is preferred. Also particularly preferred sodium methyl siliconate alkali siliconate titanate, which is particularly preferably one containing 2 to 30% by weight of the compound forming the SiO 2 in CH 3 SiO 1.5 standards.
【００３９】また本発明は、前記炉内の耐火物が、炉内
の耐火煉瓦、目地および不定形耐火物からなる群から選
ばれる１種以上であることを特徴とする。Further, the present invention is characterized in that the refractory in the furnace is at least one selected from the group consisting of refractory bricks, joints and irregular refractories in the furnace.
【００４０】本発明に従えば、釉薬を塗布して釉層を形
成する炉内耐火物は特に限定されないが、耐火煉瓦、目
地および不定形耐火物に対して用いることが好ましく、
特に目地切れなどを熱間で補修するのに好ましい。According to the present invention, the refractory in a furnace for forming a glaze layer by applying a glaze is not particularly limited, but is preferably used for refractory bricks, joints and irregular-shaped refractories.
Particularly, it is preferable for repairing joint breakage by hot.
【００４１】先行技術において、種々の釉薬は知られて
いるが、融点を考慮した組成となっていないため、施工
後、釉層が溶融して垂下し、耐火物を露出させたり、釉
層がガラス状を保ち得ず水飴のようになり、カーボンの
付着を促進する。またカーボン粒子によって釉層が削り
取られることもあり、満足な結果を得られない。これに
対し本発明の釉薬は、前記のように融点を考慮し、施工
後釉薬が溶融して耐火物表面に強固に溶着した釉層を形
成し、釉層から一部の成分が揮散して融点が上昇し、コ
ークス炉の操業温度以上の溶融温度の釉層となる。In the prior art, various glazes are known, but since the composition does not take into account the melting point, the glaze layer melts and hangs down after construction, exposing the refractory, It cannot be kept glassy and looks like syrup and promotes adhesion of carbon. Also, the glaze layer may be scraped off by the carbon particles, so that satisfactory results cannot be obtained. On the other hand, the glaze of the present invention takes into consideration the melting point as described above, and after the application, the glaze melts to form a glaze layer firmly welded to the surface of the refractory, and some components volatilize from the glaze layer. The melting point rises, forming a glaze layer with a melting temperature higher than the operating temperature of the coke oven.
【００４２】[0042]
【発明の実施の形態】以下本発明を実施例によりさらに
詳しく説明するが、本発明はこれらによって制限される
ものではない。実施例中「％」は全て重量％を表す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the following examples, but the present invention is not limited by these examples. In the examples, all “%” represent% by weight.
【００４３】（実施例１）３号水ガラス（Ｎａ2Ｏ
８．７％、ＳｉＯ2 ２７．８％、水 ６３．５％）１
００重量部、珪酸リチウム（Ｌｉ2Ｏ ２．２％、Ｓｉ
Ｏ2 ２０％）５０重量部を混合し、完全な透明液とな
るまで撹拌した。これをＡ液とする。Example 1 No. 3 water glass (Na 2 O)
8.7%, SiO 2 27.8%, water 63.5%) 1
00 parts by weight, lithium silicate (2.2% Li 2 O, Si
50 parts by weight of O 2 ( 20%) were mixed and stirred until a completely transparent liquid was obtained. This is designated as solution A.
【００４４】水９５９重量部に水酸化リチウム（ＬｉＯ
Ｈ）９６重量部を添加し、溶解した。次いでホウ酸粉末
（Ｈ3ＢＯ3）３１８重量部を添加し、撹拌し完全に透明
液にした。これをＢ液とする。Lithium hydroxide (LiO) was added to 959 parts by weight of water.
H) 96 parts by weight were added and dissolved. Then, 318 parts by weight of boric acid powder (H 3 BO 3 ) was added, and the mixture was stirred to make a completely transparent liquid. This is designated as solution B.
【００４５】ナトリウムメチルシリコーネート（Ｎａ2
Ｏ １０．７％、ＣＨ3ＳｉＯ1.5２０％：ＳｉＯ2 とし
て１７．９％）１００重量部にＢ液を１２．５重量部添
加し透明液となるまで撹拌した。これをＣ液とする。Sodium methylsiliconate (Na 2
(10.7% of O, 20% of CH 3 SiO 1.5 : 17.9% as SiO 2 ) 12.5 parts by weight of the liquid B was added to 100 parts by weight, and the mixture was stirred until a transparent liquid was obtained. This is designated as liquid C.
【００４６】Ａ液１００重量部にＣ液３０重量部を添加
し、透明液となるまで撹拌した。これをＤ液とする。To 100 parts by weight of the liquid A, 30 parts by weight of the liquid C was added and stirred until a transparent liquid was obtained. This is designated as solution D.
【００４７】なおこれらの調合に際し、速度を速めるた
め７０〜８０℃で加熱しても特に結果は変わらなかっ
た。In these preparations, heating at 70 to 80 ° C. to increase the speed did not change the results.
【００４８】得られた釉薬組成物は酸化物となったとき
の釉薬組成としてはＮａ2Ｏ ２１．７％、Ｌｉ2Ｏ
２．２％、Ｂ2Ｏ3 １．１％、ＳｉＯ2 ７５．０％で
あった。ＳｉＯ2 ３６％、Ａｌ2Ｏ3 ５４％を含む市
販のキャスタブルレンガを１００×１００×４０ｍｍに
切断し、試験耐火物片を作成した。When the obtained glaze composition turned into an oxide, the glaze composition was 21.7% of Na 2 O, Li 2 O
2.2%, B 2 O 3 1.1 %, was SiO 2 75.0%. A commercially available castable brick containing 36% of SiO 2 and 54% of Al 2 O 3 was cut into 100 × 100 × 40 mm to prepare a test refractory piece.
【００４９】この試験片を９００℃の炉入れ加熱した。
レンガの温度が９００℃に上がったのを確認した後、レ
ンガを取り出すと同時にスプレーガンにてＤ液をレンガ
面に噴霧した。最初レンガが発泡するが約１分くらいの
後、溶融し均一、強固なガラス被膜が形成された。これ
を再び９００℃の炉に入れ、２時間保持した。The test piece was placed in a furnace at 900 ° C. and heated.
After confirming that the temperature of the brick had risen to 900 ° C., the brick was taken out and, at the same time, the liquid D was sprayed on the brick surface with a spray gun. Initially, the brick foamed, but after about one minute, it melted and a uniform, strong glass coating was formed. This was placed again in a furnace at 900 ° C. and held for 2 hours.
【００５０】このようにして釉層被膜を形成したレンガ
上に石炭粉５部、コールタール３部から成るスラリーを
塗り、不活性雰囲気下（たとえば、窒素下）８００℃で
３時間加熱保持した。冷却後、接着テープを用いて付着
カーボンの剥がれ易さを評価したところ、カーボンは簡
単に剥離した。A slurry comprising 5 parts of coal powder and 3 parts of coal tar was applied to the brick on which the glaze layer film was formed in this manner, and heated and maintained at 800 ° C. for 3 hours in an inert atmosphere (eg, under nitrogen). After cooling, the adhesion carbon was easily peeled off using an adhesive tape, and the carbon was easily peeled off.
【００５１】一方、本発明の釉薬組成物を塗布しなかっ
た試料は、レンガ表面に強固にカーボンが付着し、機械
的な力を加えても完全に除去できなかった。On the other hand, in the sample to which the glaze composition of the present invention was not applied, carbon was firmly adhered to the brick surface and could not be completely removed even by applying a mechanical force.
【００５２】（実施例２）３号水ガラス（Ｎａ2Ｏ
９．６％、ＳｉＯ2 ２７．８％、水 ６２．６％）１
００％、珪酸リチウム（Ｌｉ2Ｏ ２．２％、ＳｉＯ2
２０％、水 ７７．８％）４．４重量部を混合し、完全
な透明液となるまで撹拌し、これをＡ液とした。(Example 2) No. 3 water glass (Na 2 O)
9.6%, SiO 2 27.8%, water 62.6%) 1
00%, lithium silicate (2.2% Li 2 O, SiO 2
(20%, water 77.8%) 4.4 parts by weight were mixed and stirred until a completely transparent liquid was obtained, which was used as Liquid A.
【００５３】Ａ液１００重量部に水１０．１重量部を添
加し、ついで実施例１と同一組成のＢ液を２．７重量部
添加し、最後にナトリウムメチルシリコネート（Ｎａ2
Ｏ１０．７％、ＣＨ3ＳｉＯ1.5 ２０．０％：ＳｉＯ2
として１７．９％）を１０．５％添加し、透明液となる
まで撹拌した。これをＤ液とする。To 100 parts by weight of the liquid A, 10.1 parts by weight of water was added, and then 2.7 parts by weight of the liquid B having the same composition as in Example 1 were added. Finally, sodium methylsiliconate (Na 2
O 10.7%, CH 3 SiO 1.5 20.0%: SiO 2
17.9%) and stirred until a clear liquid was obtained. This is designated as solution D.
【００５４】得られた釉薬組成物は酸化物となったとき
の釉薬組成としてはＮａ2Ｏ ２５．８％、Ｌｉ2Ｏ
０．４％、Ｂ2Ｏ3 １．０％、ＳｉＯ2 ７２．８％で
あった。なお、ナトリウムメチルシリコネートのメチル
基が消失する前の組成としてはＳｉＯ2 ６７．８％、
Ｌｉ2Ｏ ０．４％、Ｎａ2Ｏ ２５．６％、Ｂ2Ｏ3
１．０％、ＣＨ3ＳｉＯ1.5 ５．２％であった。また実
施例１と同様の試験耐火物片を作成した。When the obtained glaze composition turned into an oxide, the glaze composition was 25.8% of Na 2 O and Li 2 O
0.4%, B 2 O 3 1.0 %, was SiO 2 72.8%. The composition before the methyl group of sodium methylsiliconate disappeared was SiO 2 67.8%,
Li 2 O 0.4%, Na 2 O 25.6%, B 2 O 3
1.0% and CH 3 SiO 1.5 5.2%. Test refractory pieces similar to those in Example 1 were prepared.
【００５５】この試験片を９００℃の炉に入れ加熱し
た。レンガの温度が９００℃に上がったのを確認した
後、レンガを取出すと同時にスプレーガンにてＤ液をレ
ンガ面に噴霧した。最初レンガが発泡するが、約１分く
らいの後、溶融し均一、強固なガラス被膜が形成され
た。The test piece was placed in a furnace at 900 ° C. and heated. After confirming that the temperature of the brick had risen to 900 ° C., the brick was taken out and, at the same time, the liquid D was sprayed on the brick surface with a spray gun. Initially, the brick foamed, but after about one minute, it melted and a uniform, strong glass coating was formed.
【００５６】なお、上記のナトリウムメチルシリコネー
トの量を１／５にした他は、ほぼ同様の組成としたもの
をＥ液とした。A solution having substantially the same composition except that the amount of sodium methylsiliconate was reduced to 1/5 was used as solution E.
【００５７】得られたＥ液は酸化物となったときの釉薬
組成としてＮａ2Ｏ ２５．０％、Ｌｉ2Ｏ ０．５％、
Ｂ2Ｏ3 １．１％、ＳｉＯ2 ７３．５％であった。The obtained solution E was used as a glaze composition when it became an oxide, as Na 2 O 25.0%, Li 2 O 0.5%,
B 2 O 3 was 1.1% and SiO 2 was 73.5%.
【００５８】またナトリウムメチルシリコネートのメチ
ル基が消失する前の組成としては、ＳｉＯ2 ７２．４
％、Ｌｉ2Ｏ ０．５％、Ｎａ2Ｏ ２４．９％、Ｂ2Ｏ3
１．３％、ＣＨ3ＳｉＯ1.5 １．１％であった。The composition before the methyl group of sodium methylsiliconate disappeared was SiO 2 72.4
%, Li 2 O 0.5%, Na 2 O 24.9%, B 2 O 3
1.3% and CH 3 SiO 1.5 1.1%.
【００５９】このものを実施例１と同様の方法でテスト
した結果、均一強固なガラス皮膜が形成されたが、煉瓦
の垂直面に塗布した場合には、かなりの部分垂下した。This was tested in the same manner as in Example 1, and as a result, a uniform and strong glass film was formed. However, when it was applied to a vertical surface of a brick, a considerable part was drooped.
【００６０】（実施例３〜６）釉の組成が表１に示すも
のになるように、実施例１と同様な方法で釉薬組成物を
調製し、得られた釉層について被膜形成と付着カーボン
の剥離の評価を行った。それぞれ組成と評価結果を表１
に示す。(Examples 3 to 6) A glaze composition was prepared in the same manner as in Example 1 so that the composition of the glaze was as shown in Table 1. Was evaluated for peeling. Table 1 shows the composition and evaluation results.
Shown in
【００６１】（実施例７）前記実施例１の釉薬組成物の
Ｄ液を１００重量部と、平均粒径〜５μｍのアルミナ粉
末２０重量部とを混合しスラリー状とし、改善された釉
薬組成物を得た。このスラリーを実施例１と同様な方法
でレンガに噴霧した。形成された被膜は透明ではないが
表面は光沢があり、ガラス状であった。Example 7 An improved glaze composition was prepared by mixing 100 parts by weight of the D solution of the glaze composition of Example 1 with 20 parts by weight of alumina powder having an average particle size of 5 μm to form a slurry. I got This slurry was sprayed on bricks in the same manner as in Example 1. The formed film was not transparent, but the surface was glossy and glassy.
【００６２】（比較例１〜２）釉の組成が表１に示すも
のになるように、実施例１と同様な方法で組成物を調製
し、さらに得られた釉層について評価を行った。それぞ
れの組成と評価結果を表１に示す。(Comparative Examples 1-2) A composition was prepared in the same manner as in Example 1 so that the composition of the glaze was as shown in Table 1, and the obtained glaze layer was evaluated. Table 1 shows the compositions and evaluation results.
【００６３】[0063]
【表１】 [Table 1]
【００６４】融点は６００℃，７００℃，８００℃，９
００℃，１０００℃で熱処理した際、釉薬が溶融、釉層
を形成するかどうか肉眼で観察して推定した。The melting points are 600 ° C., 700 ° C., 800 ° C., 9
When heat-treated at 00 ° C. and 1000 ° C., it was estimated by visual observation whether the glaze melted and formed a glaze layer.
【００６５】表１の試験結果より、実施例の釉薬は、被
膜形成に優れ、カーボン付着防止効果も顕著であるが、
比較例の釉薬は両者において劣ることが明らかになっ
た。From the test results shown in Table 1, the glazes of the examples have excellent film formation and a remarkable effect of preventing carbon adhesion.
It became clear that the glaze of the comparative example was inferior in both.
【００６６】（高温保持テスト）実施例１で得られた釉
層で被覆したレンガを９００℃の温度で約５時間保持
し、焼成レンガの釉層被膜中の成分を分析するとＳｉＯ
2／Ｎａ2Ｏのモル比は３．５で当初の３．０に比べＮａ
2Ｏが減少傾向にあった。(High Temperature Holding Test) The brick covered with the glaze layer obtained in Example 1 was held at a temperature of 900 ° C. for about 5 hours, and the components in the glaze layer coating of the fired brick were analyzed.
The molar ratio of 2 / Na 2 O was 3.5, which was higher than the initial 3.0.
2 O tended to decrease.
【００６７】さらに１１００℃で１時間保持するとモル
比は７．５でＮａ2Ｏの減少が顕著に認められた。なお
このときＢ2Ｏ3 、Ｌｉ2Ｏは検出されなかった。この釉
層の融点は１３００℃以上であり、初期の８００℃以下
の融点から顕著な融点上昇効果が認められた。Further, when the temperature was maintained at 1100 ° C. for 1 hour, the molar ratio was 7.5, and a remarkable decrease in Na 2 O was observed. At this time, B 2 O 3 and Li 2 O were not detected. The melting point of this glaze layer was 1300 ° C. or higher, and a remarkable melting point increasing effect was observed from the initial melting point of 800 ° C. or lower.
【００６８】[0068]
【発明の効果】以上のように本発明によれば、コークス
炉を構成する耐火物の表面に、Ｒ2ＯとＳｉＯ2とを含
み、融点が９００℃以下の釉薬またはそれに熱膨張率調
整剤を添加した改善釉薬を熱間または冷間で塗布し、こ
れらの釉薬を溶融して、均一で緻密な釉層を形成すると
ともに釉層の融点をコークス炉の操業温度以上に上昇さ
せる。これによって石炭乾留の際に、発生するカーボン
が耐火物表面にはほとんど付着せず、また少量の付着し
たカーボンは容易に剥離でき、かつ耐火物表面が容易に
補修できる。As described above, according to the present invention, the surface of the refractory constituting the coke oven contains R 2 O and SiO 2 and has a melting point of 900 ° C. or less, a glaze or a thermal expansion coefficient adjusting agent. The glaze to which is added is applied hot or cold, and these glazes are melted to form a uniform and dense glaze layer and raise the melting point of the glaze layer above the operating temperature of the coke oven. As a result, during the carbonization of coal, carbon generated hardly adheres to the surface of the refractory, a small amount of carbon adhered can be easily peeled off, and the surface of the refractory can be easily repaired.
Claims (10)
で、Ｒ2Ｏ（ＲはＮａまたはＫを表す）が１０〜４０重
量％と、残部にＳｉＯ2 とを含み、かつ釉の融点が９０
０℃以下である釉薬を炉内耐火物表面に熱間塗布して釉
層を炉内耐火物表面に溶着形成したことを特徴とするコ
ークス炉。1. A composition for forming a glaze layer, which contains, as oxides, 10 to 40% by weight of R 2 O (R represents Na or K), the balance being SiO 2 , and the melting point of the glaze. Is 90
A coke oven characterized in that a glaze having a temperature of 0 ° C. or less is hot-coated on the surface of the refractory in the furnace and a glaze layer is formed by welding on the surface of the refractory in the furnace.
で、Ｒ2Ｏ（ＲはＮａまたはＫを表す）が１０〜４０重
量％と、残部にＳｉＯ2 とを含み、かつ釉の融点が９０
０℃以下である釉薬を炉内耐火物表面に冷間塗布後、操
業温度以下で釉薬を炉内耐火物表面に溶着形成したこと
を特徴とするコークス炉。2. A composition for forming a glaze layer, which contains, as oxides, 10 to 40% by weight of R 2 O (R represents Na or K), the balance being SiO 2 , and the melting point of the glaze. Is 90
A coke oven characterized in that a glaze at a temperature of 0 ° C. or less is cold-coated on the surface of the refractory in the furnace, and then the glaze is deposited on the surface of the refractory in the furnace at an operating temperature or less.
量％のＬｉ2Ｏと０〜１０重量％のＢ2Ｏ3とを含むこと
を特徴とする請求項１または２記載のコークス炉。3. The coke according to claim 1, wherein the glaze contains 0 to 10% by weight of Li 2 O and 0 to 10% by weight of B 2 O 3 in terms of oxide. Furnace.
０重量％のＬｉ2Ｏおよび／または０．５〜１０重量％
のＢ2Ｏ3とを含むことを特徴とする請求項３記載のコー
クス炉。4. The method according to claim 1, wherein the glaze is 0.2 to 1 in terms of oxide.
0% by weight of Li 2 O and / or 0.5 to 10% by weight
Coke oven according to claim 3, characterized in that it comprises a and B 2 O 3.
で、０〜１０重量％のＬｉ2Ｏと、０〜１０重量％のＢ2
Ｏ3 と、１０〜４０重量％のＲ2Ｏ（ＲはＮａまたはＫ
を表す）と、残部にＳｉＯ2 とを含み、かつ融点が９０
０℃以下の組成物１００重量部に対し、熱膨張率調整剤
を１００重量部以下添加して成る釉薬を炉内耐火物表面
に熱間塗布して釉層を炉内耐火物表面に溶着形成したこ
とを特徴とするコークス炉。5. The composition for forming a glaze layer is, as oxides, 0 to 10% by weight of Li 2 O and 0 to 10% by weight of B 2.
O 3 and 10 to 40% by weight of R 2 O (R is Na or K
And the balance contains SiO 2 and has a melting point of 90
A glaze obtained by adding a thermal expansion coefficient adjuster of 100 parts by weight or less to 100 parts by weight of a composition at 0 ° C. or less is hot-coated on the surface of the refractory in the furnace to form a glaze layer on the surface of the refractory in the furnace. A coke oven characterized in that:
で、０〜１０重量％のＬｉ2Ｏと、０〜１０重量％のＢ2
Ｏ3 と、１０〜４０重量％のＲ2Ｏ（ＲはＮａまたはＫ
を表す）と、残部にＳｉＯ2 とを含み、かつ融点が９０
０℃以下の組成物１００重量部に対し、熱膨張率調整剤
を１００重量部以下添加して成る釉薬を炉内耐火物表面
に冷間塗布後、操業温度以下で釉層を炉内耐火物表面に
溶着形成したことを特徴とするコークス炉。6. The composition for forming a glaze layer is, as oxides, 0 to 10% by weight of Li 2 O and 0 to 10% by weight of B 2
O 3 and 10 to 40% by weight of R 2 O (R is Na or K
And the balance contains SiO 2 and has a melting point of 90
A glaze obtained by adding 100 parts by weight or less of a thermal expansion coefficient adjusting agent to 100 parts by weight of a composition at 0 ° C. or less is cold-coated on the surface of the refractory in the furnace. A coke oven characterized by being formed on the surface by welding.
Ｏ、ＣａＯ、ＺｒＯ2およびＴｉＯ2 から成る群から選
ばれる１種以上であることを特徴とする請求項５または
６記載のコークス炉。7. The thermal expansion modifier according to claim 7, wherein the thermal expansion modifier is Al 2 O 3 , Mg.
O, CaO, coke oven according to claim 5 or 6, wherein the at least one selected from the group consisting of ZrO 2 and TiO 2.
ナトリウム、珪酸カリウムおよび珪酸リチウムから成る
群から選ばれる１種以上ならびにアルカリシリコネート
から成ることを特徴とする請求項１〜７のいずれか１項
に記載のコークス炉。8. The compound according to claim 1, wherein the compound forming SiO 2 is at least one selected from the group consisting of sodium silicate, potassium silicate and lithium silicate, and an alkali siliconate. 2. A coke oven according to claim 1.
ムメチルシリコネートであり、かつ前記ＳｉＯ2 を形成
する化合物がナトリウムメチルシリコネートをＣＨ3Ｓ
ｉＯ1.5基準で２〜３０重量％含むことを特徴とする請
求項８記載のコークス炉。Wherein said alkali siliconate sulfonate is a sodium methyl siliconate, and the compound forming the SiO 2 is sodium methyl siliconate CH 3 S
9. The coke oven according to claim 8, comprising 2 to 30% by weight based on iO 1.5 .
瓦、目地および不定形耐火物から成る群から選ばれる１
種以上であることを特徴とする請求項１〜９のいずれか
１項に記載のコークス炉。10. The refractory in the furnace is selected from the group consisting of refractory bricks, joints and irregular refractories in the furnace.
The coke oven according to any one of claims 1 to 9, wherein the coke oven is at least one kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9287315A JP2989790B2 (en) | 1997-10-20 | 1997-10-20 | Coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9287315A JP2989790B2 (en) | 1997-10-20 | 1997-10-20 | Coke oven |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52951395A Division JP2748328B2 (en) | 1994-05-17 | 1995-05-16 | Glaze for hot application to coke oven refractories and method of forming glaze layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10183134A true JPH10183134A (en) | 1998-07-14 |
| JP2989790B2 JP2989790B2 (en) | 1999-12-13 |
Family
ID=17715781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9287315A Expired - Fee Related JP2989790B2 (en) | 1997-10-20 | 1997-10-20 | Coke oven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2989790B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074631A1 (en) * | 2002-02-22 | 2003-09-12 | Jfe Steel Corporation | Hearth covering agent for carbonization chamber of coke oven, method for production thereof and method for application thereof on hearth |
| JP2007112690A (en) * | 2005-10-17 | 2007-05-10 | Yuta Saito | Glaze |
| JP2008107038A (en) * | 2006-10-26 | 2008-05-08 | Nippon Steel Corp | Refractory construction method, refractory and kiln |
| JP2016180526A (en) * | 2015-03-24 | 2016-10-13 | Ｊｆｅスチール株式会社 | Manufacturing method of container for high temperature |
-
1997
- 1997-10-20 JP JP9287315A patent/JP2989790B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074631A1 (en) * | 2002-02-22 | 2003-09-12 | Jfe Steel Corporation | Hearth covering agent for carbonization chamber of coke oven, method for production thereof and method for application thereof on hearth |
| JP2007112690A (en) * | 2005-10-17 | 2007-05-10 | Yuta Saito | Glaze |
| JP2008107038A (en) * | 2006-10-26 | 2008-05-08 | Nippon Steel Corp | Refractory construction method, refractory and kiln |
| JP2016180526A (en) * | 2015-03-24 | 2016-10-13 | Ｊｆｅスチール株式会社 | Manufacturing method of container for high temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2989790B2 (en) | 1999-12-13 |
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