JP2006056993A - Smoothening of material repaired by thermal spraying - Google Patents

Smoothening of material repaired by thermal spraying Download PDF

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JP2006056993A
JP2006056993A JP2004240034A JP2004240034A JP2006056993A JP 2006056993 A JP2006056993 A JP 2006056993A JP 2004240034 A JP2004240034 A JP 2004240034A JP 2004240034 A JP2004240034 A JP 2004240034A JP 2006056993 A JP2006056993 A JP 2006056993A
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thermal spray
spray repair
heating
repair layer
carbonization chamber
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Yasuo Wada
保郎 和田
Hironaga Inamasu
裕修 稲益
Nobuteru Takayama
信輝 高山
Kohei Ota
晃平 大田
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KN LAB ANALYSIS KK
Kansai Coke and Chemicals Co Ltd
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KN LAB ANALYSIS KK
Kansai Coke and Chemicals Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing an oven wall of a carbonization chamber of a coke oven by which the surface of a layer repaired by thermal spraying and formed at the damaged part of the oven wall of the carbonization chamber of the coke oven can be smoothened. <P>SOLUTION: The surface of the layer repaired by the thermal spraying and previously formed at the damaged part of the oven wall of the carbonization chamber is heated to ≥1,300°C when repairing the oven wall of the carbonization chamber of the coke oven. By the heating, the layer repaired by the thermal spraying is smoothened by forming a glass layer on the surface. Preferably, the surface of the layer repaired by the thermal spraying is heated by a flame of a mixed gas of an inflammable gas and a combustion-supporting gas. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はコークス炉炭化室炉壁の補修方法に関し、さらに詳しくは溶射補修材の平滑化に関する。   The present invention relates to a method for repairing a coke oven carbonization chamber furnace wall, and more particularly, to smoothing a thermal spray repair material.

従来、コークス炉炭化室炉壁の補修は、前記炭化室炉壁を構成する耐火煉瓦の損傷部を溶射法により肉盛りして炉構造の強度を保持し、かつ煤煙を抑制することを主な目的としていた。溶射法により炉壁損傷部に肉盛りを行った場合、肉盛り部分の表面には凹凸が生じることが多く、この凹凸にカーボンが付着して大きな突起物ができ、コークス押出抵抗となり、押し詰まりの原因となる。また、コークスを押し出すと同時に溶射補修層および耐火煉瓦の一部も剥離するという現象も確認されている。それゆえ、コークス押出抵抗が増大しないように溶射補修層の肉盛り部分の凹凸を抑制する必要があるが、肉盛り部分の表面平滑化は各々の吹き付け作業員の技量に委ねるしかなく、また、肉盛り部分の平滑度にも限界があった。   Conventionally, the coke oven carbonization chamber wall is mainly repaired by depositing the damaged part of the refractory brick constituting the carbonization chamber furnace wall by a thermal spraying method to maintain the strength of the furnace structure and to suppress soot and smoke. It was aimed. When depositing on the damaged part of the furnace wall by the thermal spraying method, irregularities often occur on the surface of the deposited part, and carbon adheres to the irregularities to form large protrusions, resulting in coke extrusion resistance and clogging. Cause. In addition, it has been confirmed that the thermal spray repair layer and a part of the refractory brick are peeled off at the same time as the coke is extruded. Therefore, it is necessary to suppress the unevenness of the build-up portion of the thermal spray repair layer so that the coke extrusion resistance does not increase, but the surface smoothing of the build-up portion must be left to the skill of each spraying worker, There was a limit to the smoothness of the overlay.

火炎溶射補修において溶射補修層の凹凸を抑制する方法として、特許文献１には、溶射補修材料の粒子径を規定する技術が開示され、また、特許文献２には、溶射補修材料の化学組成を規定する技術が開示されている。   As a method for suppressing the unevenness of the thermal spray repair layer in flame spray repair, Patent Document 1 discloses a technique for defining the particle size of the thermal spray repair material, and Patent Document 2 discloses the chemical composition of the thermal spray repair material. The defining technology is disclosed.

しかし、火炎溶射補修に用いる溶射補修材料の粒子径や化学組成を規定しても、他の溶射法、例えば、テルミット反応熱を利用した溶射法では、骨材成分の一部が溶融せずに残存する可能性が高く、溶射補修層の表面を平滑化することは困難であると考えられる。   However, even if the particle size and chemical composition of the thermal spray repair material used for flame spray repair are prescribed, other thermal spraying methods, for example, thermal spraying method using thermite reaction heat, do not melt some of the aggregate components. The possibility of remaining is high, and it is considered difficult to smooth the surface of the thermal spray repair layer.

これに対し、溶射法に依存することなく溶射補修層の表面を物理的に平坦化する方法として、特許文献３には、コテを用いて溶射補修層の表面を平坦化する技術が開示され、また、特許文献４には、機械的にハツリして溶射補修層の表面を平坦化する技術が開示されている。
特開平１０−８９８５４号公報 特開平１１−２７９７４０号公報 特開平９−３０２３５４号公報 特開２０００−２１２５６６号公報 On the other hand, as a method of physically flattening the surface of the thermal spray repair layer without depending on the thermal spraying method, Patent Document 3 discloses a technique for planarizing the surface of the thermal spray repair layer using a trowel, Patent Document 4 discloses a technique for mechanically crushing and flattening the surface of the thermal spray repair layer.
JP-A-10-89854 JP 11-279740 A JP-A-9-302354 Japanese Patent Laid-Open No. 2000-212566

しかし、コテによる整形や機械的なハツリは、溶射補修層の表面を平坦化、つまり炭化室炉壁を構成する耐火煉瓦の表面と同じレベルにしているだけであって、必ずしも溶射補修層の表面を平滑化しているわけではない。   However, shaping with a trowel or mechanical chipping only flattens the surface of the sprayed repair layer, that is, at the same level as the surface of the refractory brick that forms the carbonization chamber furnace wall. Is not smoothing.

本発明は、上記従来の問題点を解決するものであり、その目的とするところは、コークス炉炭化室の炉壁損傷部に形成された溶射補修層の表面を平滑化することができる補修方法を提供することにある。   The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a repair method capable of smoothing the surface of the sprayed repair layer formed on the damaged portion of the coke oven carbonization chamber. Is to provide.

コークス炉炭化室の炉壁損傷部を補修するに際し、例えば、テルミット反応熱を利用した溶射法では、吹き付けた溶射補修層の表面温度が不均一であるので、骨材成分の一部が溶融せずに残存して溶射補修層の表面に凹凸が発生すると考えられる。本発明者らは、このような観点から溶射補修層の表面を平滑化する方法について鋭意検討した結果、溶射補修層の表面を所定温度に加熱すれば、溶融せずに残存していた成分を含めて骨材が溶融し、溶射補修層の表面にガラス層を形成して平滑化することを見出し、本発明を完成するに至った。   When repairing the damaged part of the coke oven carbonization chamber, for example, in the spraying method using thermite reaction heat, the surface temperature of the sprayed repaired layer is not uniform, so some of the aggregate components melt. It is thought that unevenness occurs on the surface of the thermal spray repair layer. As a result of earnestly examining the method of smoothing the surface of the thermal spray repair layer from such a viewpoint, if the surface of the thermal spray repair layer is heated to a predetermined temperature, the components remaining without melting are removed. In addition, it was found that the aggregate was melted and a glass layer was formed on the surface of the thermal spray repair layer to smooth the surface, and the present invention was completed.

すなわち、本発明によるコークス炉炭化室炉壁の補修方法は、コークス炉の炭化室炉壁を補修するにあたり、前記炭化室炉壁の損傷部に予め形成された溶射補修層の表面を１３００℃以上の温度に加熱することを特徴とする。この加熱により、前記溶射補修層は、その表面にガラス層を形成して平滑化する。前記溶射補修層の表面は、好ましくは可燃性ガスと支燃性ガスとの混合ガスの燃焼炎により加熱される。   That is, in the repair method of the coke oven carbonization chamber furnace wall according to the present invention, the surface of the sprayed repair layer formed in advance on the damaged portion of the coking chamber furnace wall is 1300 ° C. or higher. It is characterized by heating to a temperature of By this heating, the thermal spray repair layer is smoothed by forming a glass layer on the surface thereof. The surface of the thermal spray repair layer is preferably heated by a combustion flame of a mixed gas of combustible gas and supporting gas.

本発明の補修方法によれば、コークス炉炭化室の炉壁損傷部に形成された溶射補修層の表面が平滑化するので、カーボンの付着および成長を抑制し、コークス押出抵抗を低減して押し詰まりを防止することができる。また、専用の装置を必要とせず、汎用の加熱装置を利用して溶射補修層を所定温度に加熱するだけであるので、極めて簡便かつ効率的にコークス炉炭化室炉壁の補修を行うことができる。   According to the repair method of the present invention, since the surface of the sprayed repair layer formed in the damaged part of the furnace wall of the coke oven carbonization chamber is smoothed, the adhesion and growth of carbon is suppressed, and the coke extrusion resistance is reduced and pushed. Clogging can be prevented. In addition, since a thermal spray repair layer is only heated to a predetermined temperature using a general-purpose heating device without requiring a dedicated device, the coke oven carbonization chamber wall can be repaired extremely simply and efficiently. it can.

本発明の補修方法は、コークス炉の炭化室炉壁を補修するにあたり、前記炭化室炉壁の損傷部に予め形成された溶射補修層の表面を１３００℃以上の温度に加熱することで、前記溶射補修層の表面を平滑化する。   In the repair method of the present invention, in repairing the carbonization chamber furnace wall of the coke oven, the surface of the thermal spray repair layer formed in advance on the damaged portion of the carbonization chamber furnace wall is heated to a temperature of 1300 ° C. or higher. Smooth the surface of the thermal spray repair layer.

本発明の補修方法は、例えば、図１(ａ)〜(ｅ)に示すように行われる。まず、図１(ａ)に示すようなコークス炉炭化室の炉壁損傷部に対して、例えば、二酸化珪素（ＳｉＯ2）と少量の複数の金属酸化物（Ａｌ2Ｏ3、ＣａＯ、Ｆｅ2Ｏ3など）と金属珪素（Ｓｉ）とからなる粉体混合物を溶射補修材料として用いて、図１(ｂ)に示すように、例えば、テルミット反応熱を利用した通常の溶射補修を行う。 The repair method of the present invention is performed, for example, as shown in FIGS. First, for example, silicon dioxide (SiO 2 ) and a small amount of a plurality of metal oxides (Al 2 O 3 , CaO, Fe 2 ) with respect to the damaged portion of the coke oven carbonization chamber as shown in FIG. As shown in FIG. 1B, for example, normal thermal spray repair using thermite reaction heat is performed using a powder mixture composed of O 3 or the like) and metal silicon (Si) as the thermal spray repair material.

補修材料としては、上記の粉体混合物に限定されることはなく、通常、コークス炉炭化室の炉壁損傷部を補修するのに用いられる材料であれば、いかなる材料であっても用いることができる。例えば、テルミット反応熱を利用した溶射補修では、骨材と発熱材の粉体混合物が補修材料として用いられ、高温の被溶射体に酸素と共に補修材料を吹き付け、発熱材の酸化発熱反応を利用して骨材を溶融させる。骨材は、例えば、９０質量％以上の二酸化珪素（ＳｉＯ2）に、酸化アルミニウム（Ａｌ2Ｏ3）、酸化カルシウム（ＣａＯ）、酸化マグネシウム（ＭｇＯ）、酸化鉄（Ｆｅ2Ｏ3）、酸化カリウム（Ｋ2Ｏ）、酸化ナトリウム（Ｎａ2Ｏ）などの金属酸化物の一種または二種以上を１０質量％以下の割合で配合した粉体混合物である。発熱材は、例えば、金属珪素（Ｓｉ）粉体である。溶射補修には、いかなる溶射法を用いてもよいが、テルミット反応熱を利用した溶射法の他に、例えば、火炎溶射法やプラズマ溶射法などが挙げられる。 The repair material is not limited to the above powder mixture, and any material can be used as long as the material is usually used to repair the damaged wall of the coke oven carbonization chamber. it can. For example, in thermal spray repair using thermite reaction heat, a powder mixture of aggregate and heat generating material is used as the repair material, and the repair material is sprayed together with oxygen on the high temperature sprayed body, and the oxidation exothermic reaction of the heat generating material is used. To melt the aggregate. The aggregate is, for example, 90% by mass or more of silicon dioxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), calcium oxide (CaO), magnesium oxide (MgO), iron oxide (Fe 2 O 3 ), oxidized It is a powder mixture in which one or more metal oxides such as potassium (K 2 O) and sodium oxide (Na 2 O) are blended at a ratio of 10% by mass or less. The heat generating material is, for example, metal silicon (Si) powder. Any thermal spraying method may be used for the thermal spray repair, but other than the thermal spraying method using thermite reaction heat, for example, flame spraying method or plasma spraying method may be mentioned.

このようにして形成された溶射補修層の表面は、図１(ｃ)に示すように、炭化室炉壁を構成する耐火煉瓦の表面とほぼ同一レベルであっても、凹凸が存在しており、平滑ではない。そこで、図１(ｄ)に示すように、例えば、ガス溶接用バーナーを用いて、溶射補修層の表面を１３００℃以上、好ましくは１６００℃、より好ましくは１８００℃以上の温度に加熱する。加熱温度は、例えば、放射温度計を用いて非接触的に測定すればよい。加熱温度が１３００℃未満であると、溶射補修層の表面を平滑化するのに不充分である。加熱温度の上限は、特に限定されないが、アセチレンと酸素との燃焼炎による３８００℃程度である。３８００℃を超えて加熱すると、炭化室炉壁が損傷する可能性があるので推奨できない。加熱温度の上限は、好ましくは２６００℃以下、より好ましくは２０００℃以下である。   As shown in FIG. 1 (c), the surface of the thermal spray repair layer formed in this way has irregularities even though it is almost at the same level as the surface of the refractory brick constituting the coking chamber furnace wall. Not smooth. Therefore, as shown in FIG. 1D, for example, the surface of the thermal spray repair layer is heated to a temperature of 1300 ° C. or higher, preferably 1600 ° C., more preferably 1800 ° C. or higher using a gas welding burner. The heating temperature may be measured in a non-contact manner using, for example, a radiation thermometer. When the heating temperature is less than 1300 ° C., it is insufficient for smoothing the surface of the thermal spray repair layer. The upper limit of the heating temperature is not particularly limited, but is about 3800 ° C. due to a combustion flame of acetylene and oxygen. Heating above 3800 ° C is not recommended because it may damage the carbonization chamber furnace wall. The upper limit of the heating temperature is preferably 2600 ° C. or less, more preferably 2000 ° C. or less.

加熱は、上記の温度を達成することができる加熱手段であれば、いかなる手段を用いて行ってもよい。汎用の装置を用いて簡便かつ効率的に加熱が行えることから、バーナーランスを水冷または空冷としたガス溶接用バーナーを用いることが好ましい。ガス溶接用バーナーを用いる場合には、燃焼炎と溶射補修層の表面との距離によって、加熱温度を調節することができる。燃焼炎としては、例えば、可燃性ガスと支燃性ガスとの混合ガスの燃焼炎が用いられる。可燃性ガスとしては、例えば、アセチレン、プロパン、水素、石炭ガスなどが挙げられる。支燃性ガスとしては、例えば、空気、酸素などが挙げられる。これらのガスは、単独で用いても、二種以上を組み合わせて用いてもよい。可燃性ガスと支燃性ガスとを適当に組み合わせることにより、加熱温度を選択することができる。例えば、アセチレンと空気で最高３０００℃、アセチレンと酸素で最高３８００℃、プロパンガスと空気で最高１９００℃、プロパンガスと酸素で最高２６００℃、水素と空気で最高１９００℃、水素と酸素で最高２８００℃などである。可燃性ガスと支燃性ガスとの混合割合は、特に限定されるものではなく、所望の加熱温度が得られるように適宜調節すればよい。   The heating may be performed using any means as long as it is a heating means that can achieve the above temperature. It is preferable to use a gas welding burner in which the burner lance is water-cooled or air-cooled because heating can be performed easily and efficiently using a general-purpose apparatus. When a gas welding burner is used, the heating temperature can be adjusted according to the distance between the combustion flame and the surface of the thermal spray repair layer. As the combustion flame, for example, a combustion flame of a mixed gas of combustible gas and combustion-supporting gas is used. Examples of the combustible gas include acetylene, propane, hydrogen, and coal gas. Examples of the combustion-supporting gas include air and oxygen. These gases may be used alone or in combination of two or more. The heating temperature can be selected by appropriately combining the combustible gas and the combustion-supporting gas. For example, acetylene and air up to 3000 ° C, acetylene and oxygen up to 3800 ° C, propane gas and air up to 1900 ° C, propane gas and oxygen up to 2600 ° C, hydrogen and air up to 1900 ° C, hydrogen and oxygen up to 2800 ℃ etc. The mixing ratio of the combustible gas and the combustion-supporting gas is not particularly limited, and may be appropriately adjusted so as to obtain a desired heating temperature.

加熱時間は、一般的に、加熱温度が低い場合は長く、加熱温度が高い場合は短く設定される。また、例えば、ガス溶接用バーナーを用いる場合には、燃焼炎の大きさや溶射補修層の表面積により加熱面積が異なるので、燃焼炎の大きさや溶射補修層の表面積に応じて加熱時間を設定する必要がある。いずれにしても溶射補修層の表面が平滑化するのに充分な時間にわたって加熱すればよい。それゆえ、加熱時間は、特に限定されないが、通常の表面積を有する溶射補修層の場合、５秒以上加熱すれば、溶射補修層の表面を充分に平滑化することができる。加熱時間が５秒未満であると、溶射補修層の表面を平滑化する効果が小さい。加熱時間の上限は、特に限定されないが、３０秒を越えると、炉壁を損傷する可能性があるので推奨できない。また、溶射補修層の表面が平滑化した後も不必要に加熱することになり、エネルギー消費量および作業時間が増大する。加熱時間は、好ましくは１０秒以上、２０秒以下である。   In general, the heating time is set long when the heating temperature is low, and short when the heating temperature is high. Also, for example, when using a gas welding burner, the heating area varies depending on the size of the combustion flame and the surface area of the thermal spray repair layer, so it is necessary to set the heating time according to the size of the combustion flame and the surface area of the thermal spray repair layer. There is. In any case, it may be heated for a time sufficient to smooth the surface of the thermal spray repair layer. Therefore, the heating time is not particularly limited. In the case of a thermal spray repair layer having a normal surface area, the surface of the thermal spray repair layer can be sufficiently smoothed by heating for 5 seconds or more. When the heating time is less than 5 seconds, the effect of smoothing the surface of the thermal spray repair layer is small. The upper limit of the heating time is not particularly limited, but if it exceeds 30 seconds, the furnace wall may be damaged, which is not recommended. Moreover, even after the surface of the thermal spray repair layer is smoothed, it is heated unnecessarily, increasing energy consumption and working time. The heating time is preferably 10 seconds or more and 20 seconds or less.

かくして、図１(ｅ)に示すように、コークス炉炭化室の炉壁損傷部に形成された溶射補修層の表面が平滑化される。なお、溶射補修層の表面を加熱するのは、溶射補修層を形成した後であれば、どの段階であってもよいが、図１(ａ)〜(ｅ)に示すように、作業効率の観点から、溶射補修層を形成した直後に、溶射補修層の表面が１０００℃程度の温度を維持している段階で行うのが好ましい。このように処理された溶射補修層は、その表面にガラス層を形成しており、充分に平滑であるので、カーボンの付着または成長が発生することがなく、また、コークス押出抵抗が低減されて押し詰まりを起こすことがない。   Thus, as shown in FIG. 1 (e), the surface of the thermal spray repair layer formed on the damaged portion of the coke oven carbonization chamber is smoothed. The surface of the thermal spray repair layer may be heated at any stage after the thermal spray repair layer is formed, as shown in FIGS. 1 (a) to 1 (e). From the viewpoint, it is preferable to carry out at a stage where the surface of the thermal spray repair layer maintains a temperature of about 1000 ° C. immediately after the thermal spray repair layer is formed. The thermal spray repair layer treated in this way forms a glass layer on its surface and is sufficiently smooth so that no carbon adhesion or growth occurs, and the coke extrusion resistance is reduced. Does not cause clogging.

本発明の補修方法は、コークス炉炭化室の炉壁損傷部に予め形成された溶射補修層を所定温度に加熱するだけで、溶射補修層の表面を平滑化することができる。それゆえ、極めて簡便かつ効率的にコークス炉炭化室炉壁の補修作業を行うことができる。   The repair method of the present invention can smooth the surface of the sprayed repair layer only by heating the sprayed repair layer formed in advance to the damaged part of the coke oven carbonization chamber at a predetermined temperature. Therefore, the coke oven carbonization chamber wall can be repaired extremely simply and efficiently.

本発明を実験例によってさらに詳しく説明する。なお、実験例では、下記の方法により試料の表面粗さを測定した。   The present invention will be described in more detail by experimental examples. In the experimental example, the surface roughness of the sample was measured by the following method.

（表面粗さの測定）
表面粗さの測定は、三次元写真計測システム（クラボウ社製、クラヴェス）を用いて、試料の切断面を定量化することにより行った。なお、表面粗さの指標は、ＪＩＳ Ｂ０６０１に規定される算術平均粗さとした。算術平均粗さＲａとは、粗さ曲線からその平均線の方向に基準長さだけ抜き取り、この抜き取り部分の平均線の方向にＸ軸を、縦倍率の方向にＹ軸を取り、粗さ曲線をｙ＝ｆ(ｘ)で表したときに、平均線から粗さ曲線までの偏差の絶対値を合計して平均した値、すなわち次の式によって求められる値をいう。 (Measurement of surface roughness)
The surface roughness was measured by quantifying the cut surface of the sample using a three-dimensional photo measurement system (Kurabo Co., Ltd., Claves). The index of surface roughness was the arithmetic average roughness specified in JIS B0601. Arithmetic average roughness Ra is a roughness curve extracted from the roughness curve by a reference length in the direction of the average line, the X-axis in the direction of the average line of this extracted portion, and the Y-axis in the direction of the vertical magnification. Is expressed as y = f (x), the absolute value of deviation from the average line to the roughness curve is summed and averaged, that is, a value obtained by the following equation.

Figure 2006056993
Figure 2006056993

ここで、Ｌは基準長さである。 Here, L is a reference length.

実験例
９６質量％の二酸化珪素（ＳｉＯ2）に４質量％の金属酸化物（Ａｌ2Ｏ3、ＣａＯ、ＭｇＯなど）を配合した最大粒子径１．５ｍｍの粉体混合物である骨材と金属珪素（Ｓｉ）粉体である発熱材とからなる溶射補修材料を用いて、この溶射補修材料を耐火煉瓦に吹き付けたドーム状溶射体を試料とした。まず、この試料の頭頂部を約１．５ｃｍ四方に切除し、加熱前の表面粗さを測定した。次いで、図２に示すように、小規模電気炉２の上部にて約１０００℃に予熱した状態で、ＬＰＧ仕様のガス溶接用バーナー３を用いて、試料１を１０秒加熱することにより、その表面を平滑化した。加熱温度は、放射温度計４を用いて測定し、記録計５で読み取った。次いで、試料１を放冷した後、加熱後の表面粗さを測定した。なお、実験は、加熱温度を１３００℃以上、２０００℃以下の範囲内で選択した９つの温度で行った。また、温度設定はガス溶接用バーナーと試料表面の距離で調節した。加熱前後の試料表面の算術平均粗さの差を加熱温度に対してプロットしたグラフを図３に示す。 Experimental Example Aggregate and metal, which is a powder mixture having a maximum particle diameter of 1.5 mm, in which 96% by mass of silicon dioxide (SiO 2 ) is mixed with 4% by mass of metal oxide (Al 2 O 3 , CaO, MgO, etc.) Using a thermal spray repair material composed of a heat generating material that is silicon (Si) powder, a dome-shaped thermal spray body in which this thermal spray repair material was sprayed onto a refractory brick was used as a sample. First, the top of the sample was cut into a square of about 1.5 cm, and the surface roughness before heating was measured. Next, as shown in FIG. 2, by heating the sample 1 for 10 seconds using a gas welding burner 3 of LPG specifications in a state preheated to about 1000 ° C. in the upper part of the small-scale electric furnace 2, The surface was smoothed. The heating temperature was measured with a radiation thermometer 4 and read with a recorder 5. Next, after the sample 1 was allowed to cool, the surface roughness after heating was measured. The experiment was performed at nine temperatures selected within a range of heating temperatures of 1300 ° C. or more and 2000 ° C. or less. The temperature setting was adjusted by the distance between the gas welding burner and the sample surface. FIG. 3 shows a graph in which the difference in arithmetic mean roughness of the sample surface before and after heating is plotted against the heating temperature.

図３から明らかなように、実験を行った９つの加熱温度のいずれにおいても、加熱後に試料の表面粗さが低減された。また、特に１８００℃以上、２０００℃以下の温度で加熱した場合に、表面粗さが大きく低減された。実験に用いた溶射補修材料は実際にコークス炉炭化室炉壁の補修に用いられるものであるので、この実験の結果から、炭化室炉壁の損傷部に予め形成された溶射補修層の表面を１３００℃以上の温度に加熱することにより、その表面を平滑化することができることがわかる。   As can be seen from FIG. 3, the surface roughness of the sample was reduced after heating at any of the nine heating temperatures tested. In particular, when heated at a temperature of 1800 ° C. or higher and 2000 ° C. or lower, the surface roughness was greatly reduced. Since the thermal spray repair material used in the experiment is actually used for repairing the coke oven chamber wall, the results of this experiment show that the surface of the thermal spray repair layer previously formed on the damaged portion of the chamber chamber wall It can be seen that the surface can be smoothed by heating to a temperature of 1300 ° C. or higher.

本発明の補修方法は、コークス炉炭化室の炉壁損傷部に形成された溶射補修層を平滑化することにより、コークス押出抵抗を低減し、ひいてはコークス炉自体の寿命を延長することができる。それゆえ、コークスの製造コストを抑制し、コークス製造業界に多大の貢献をなすものである。   The repair method of the present invention can reduce the coke extrusion resistance by smoothing the thermal spray repair layer formed in the damaged part of the furnace wall of the coke oven carbonization chamber, thereby extending the life of the coke oven itself. Therefore, it reduces the cost of coke production and makes a great contribution to the coke production industry.

本発明によるコークス炉炭化室炉壁の補修方法を行う手順を示す説明図。Explanatory drawing which shows the procedure which performs the repair method of the coke oven carbonization chamber furnace wall by this invention. 実験例で行った実験を示す概略図。Schematic which shows the experiment conducted in the experiment example. 実験例で行った実験の結果として加熱前後の試料表面の算術平均粗さの差を加熱温度に対してプロットしたグラフ図。The graph figure which plotted the difference of the arithmetic mean roughness of the sample surface before and behind heating as a result of the experiment performed in the experiment example with respect to heating temperature.

符号の説明Explanation of symbols

１ 試料
２ 小規模電気炉
３ ガス溶接用バーナー
４ 放射温度計
５ 記録計 1 Sample 2 Small Electric Furnace 3 Gas Welding Burner 4 Radiation Thermometer 5 Recorder

Claims (2)

コークス炉の炭化室炉壁を補修するにあたり、前記炭化室炉壁の損傷部に予め形成された溶射補修層の表面を１３００℃以上の温度に加熱することを特徴とするコークス炉炭化室炉壁の補修方法。   In repairing a coking chamber furnace wall of a coke oven, a surface of a sprayed repair layer formed in advance on a damaged portion of the coking chamber furnace wall is heated to a temperature of 1300 ° C. or higher. Repair method. 前記溶射補修層の表面を可燃性ガスと支燃性ガスとの混合ガスの燃焼炎により加熱する請求項１記載の補修方法。

The repair method of Claim 1 which heats the surface of the said thermal spray repair layer with the combustion flame of the mixed gas of combustible gas and supporting gas.

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007262106A (en) * 2006-03-27 2007-10-11 Nippon Steel Corp Method for repairing furnace wall of coking chamber of coke oven
JP2008020143A (en) * 2006-07-13 2008-01-31 Kansai Coke & Chem Co Ltd Repairing method for fire resistant wall surface
JP2010280848A (en) * 2009-06-05 2010-12-16 Sumitomo Metal Ind Ltd Method for coating furnace wall in carbonization chamber of coke furnace
JP2012067264A (en) * 2010-09-27 2012-04-05 Nippon Steel Corp Method for estimating coke extrusion load in coke oven
JP2012188345A (en) * 2011-02-25 2012-10-04 Shinagawa Refractories Co Ltd Thermal spray material

Citations (8)

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Publication number Priority date Publication date Assignee Title
JPH0291190A (en) * 1988-09-29 1990-03-30 Kawasaki Steel Corp Method of hot repair near throat of carbonization chamber of coke oven
JPH02160896A (en) * 1988-12-13 1990-06-20 Sumitomo Metal Ind Ltd Method for preventing adhesion of carbon to coke oven wall surface
JPH0245110B2 (en) * 1986-12-22 1990-10-08 Kawasaki Steel Co
JPH0770565A (en) * 1993-09-07 1995-03-14 Nippon Steel Corp Brick for coke oven chamber
JPH0971781A (en) * 1995-06-27 1997-03-18 Nkk Corp Repair and/or reinforcement of bulkhead of bulkhead heat exchanger
JPH1150057A (en) * 1997-08-05 1999-02-23 Nkk Corp Mend of wall of coke oven
JP2000034485A (en) * 1998-07-17 2000-02-02 Nkk Corp Repair of furnace wall of coke oven
JP2004167599A (en) * 2002-11-19 2004-06-17 Nippon Steel Hardfacing Co Ltd Carrying roll

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0245110B2 (en) * 1986-12-22 1990-10-08 Kawasaki Steel Co
JPH0291190A (en) * 1988-09-29 1990-03-30 Kawasaki Steel Corp Method of hot repair near throat of carbonization chamber of coke oven
JPH02160896A (en) * 1988-12-13 1990-06-20 Sumitomo Metal Ind Ltd Method for preventing adhesion of carbon to coke oven wall surface
JPH0770565A (en) * 1993-09-07 1995-03-14 Nippon Steel Corp Brick for coke oven chamber
JPH0971781A (en) * 1995-06-27 1997-03-18 Nkk Corp Repair and/or reinforcement of bulkhead of bulkhead heat exchanger
JPH1150057A (en) * 1997-08-05 1999-02-23 Nkk Corp Mend of wall of coke oven
JP2000034485A (en) * 1998-07-17 2000-02-02 Nkk Corp Repair of furnace wall of coke oven
JP2004167599A (en) * 2002-11-19 2004-06-17 Nippon Steel Hardfacing Co Ltd Carrying roll

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007262106A (en) * 2006-03-27 2007-10-11 Nippon Steel Corp Method for repairing furnace wall of coking chamber of coke oven
JP2008020143A (en) * 2006-07-13 2008-01-31 Kansai Coke & Chem Co Ltd Repairing method for fire resistant wall surface
JP2010280848A (en) * 2009-06-05 2010-12-16 Sumitomo Metal Ind Ltd Method for coating furnace wall in carbonization chamber of coke furnace
JP2012067264A (en) * 2010-09-27 2012-04-05 Nippon Steel Corp Method for estimating coke extrusion load in coke oven
JP2012188345A (en) * 2011-02-25 2012-10-04 Shinagawa Refractories Co Ltd Thermal spray material

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