JPH0671200A - Thermal spray maintenance device - Google Patents

Thermal spray maintenance device

Info

Publication number
JPH0671200A
JPH0671200A JP4255830A JP25583092A JPH0671200A JP H0671200 A JPH0671200 A JP H0671200A JP 4255830 A JP4255830 A JP 4255830A JP 25583092 A JP25583092 A JP 25583092A JP H0671200 A JPH0671200 A JP H0671200A
Authority
JP
Japan
Prior art keywords
mixing chamber
chamber
oxygen gas
thermal spray
mixing
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
Application number
JP4255830A
Other languages
Japanese (ja)
Other versions
JP2699778B2 (en
Inventor
Yuji Narita
雄司 成田
Hidekuni Ito
英邦 伊藤
Susumu Otani
進 大谷
Makoto Numazawa
誠 沼沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP4255830A priority Critical patent/JP2699778B2/en
Publication of JPH0671200A publication Critical patent/JPH0671200A/en
Application granted granted Critical
Publication of JP2699778B2 publication Critical patent/JP2699778B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To provide a thermal spray maintenance device capable of mixing homogeneously the fine particles including metal powder and oxygen gas to afford an excellent ignitability and adhesive strength. CONSTITUTION:The fine particles containing metal powder and oxygen gas are fed into a mixing chamber 11 through separate lines. The mixing chamber 11 has an open inlet end for the oxygen gas and a stirring chamber 15 for mixed fluid at the other end. A thermal spray nozzle 14 is provided between the stirring chamber 15 and the mixing chamber 11 extending from the chamber wall in a T-shaped arrangement. The fine particles and the oxygen gas fed into the mixing chamber 11 are homogeneously mixed in the mixing and stirring chamber and discharged from the thermal spray nozzle 14.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、例えばコークス炉等
の窯炉における内壁面の損傷部分を補修する溶射装置に
係り、より詳しくは酸化性粒子を酸素と反応させて発生
する熱により耐火性粒子を溶融させて溶射する溶射補修
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal spraying apparatus for repairing a damaged portion of an inner wall surface of a kiln such as a coke oven, and more particularly, to a fire resistance by heat generated by reacting oxidizing particles with oxygen. The present invention relates to a thermal spray repair apparatus that melts and sprays particles.

【0002】[0002]

【従来の技術】鉄鋼製造プロセスにおける各種の加熱
炉、反応炉は周知の通り長期間にわたり連続運転されて
おり、設備の耐久性や寿命を延ばすために稼働中の高温
下で炉体の補修が行われている。この補修方法としては
従来、無機バインダーと水とを配合した結合剤と耐火性
粒子とを混合して吹付ける方式がとられてきたが、最近
では、補修部分に耐火性粒子を溶射する技術が採用され
ている。
2. Description of the Related Art As is well known, various heating furnaces and reaction furnaces in the steel manufacturing process have been continuously operated for a long period of time. In order to extend the durability and life of the equipment, it is necessary to repair the furnace body at high temperature during operation. Has been done. As this repair method, conventionally, a method of mixing and spraying a binder mixed with an inorganic binder and water and refractory particles has been taken, but recently, a technique of spraying the refractory particles on the repaired part has been proposed. Has been adopted.

【0003】例えば、可燃ガスの燃焼炎中に耐火性粒子
を投入する火炎溶射法(特公昭60−46062号公報
等参照)、ガスプラズマジェットによるプラズマ法(特
開昭56−59679号公報等参照)、耐火粉末と混合
した金属粉あるいは炭素粉を酸素気流中で搬送し熱間雰
囲気に噴射、燃焼させて火炎を形成する一種のテルミッ
ト反応法(特公昭49−46364号公報参照)等が知
られている。これら溶射法は旧来の湿式法(吹付け方
式)と異なり、水分に起因した弊害がなく、優れた補修
効果が得られる。ただし、補修材料に高融点の材料を用
いるため、火炎溶射法とテルミット反応法の場合は付着
状態の点で必ずしも満足できる状態ではないが、大容量
施工に適している。
For example, a flame spraying method in which refractory particles are put into a combustion flame of a combustible gas (see Japanese Patent Publication No. 60-46062), a plasma method using a gas plasma jet (see Japanese Patent Publication No. 56-59679, etc.). ), A kind of thermite reaction method (see Japanese Patent Publication No. 49-46364) in which a metal powder or a carbon powder mixed with a refractory powder is conveyed in an oxygen stream and is injected into a hot atmosphere and burned to form a flame. Has been. Unlike the conventional wet method (spraying method), these thermal spraying methods have no harmful effect caused by moisture and can provide an excellent repair effect. However, since a high melting point material is used as the repair material, the flame spraying method and the thermite reaction method are not necessarily satisfactory in terms of adhesion, but are suitable for large-volume construction.

【0004】最近、コークス炉では生産性向上の観点か
ら特定の炉団において生産増をはかる傾斜生産が行われ
ている。このため、操業負荷の大きい炉団で損傷が進行
し、補修時間の短縮を含めた作業効率を高める必要が生
じている。一方、生産性を落したコークス炉では操業負
荷の変更頻度の高いことが要因となって損傷が頻発し、
補修作業量自体が増加してきた。特に、炉齢の進行とと
もに、炉体中央部における壁面亀裂の発生、生長が顕著
となり、新たな補修が必要となってきた。従来、コーク
ス炉の窯口部はテルミット反応法により補修が行われて
いるが、炉中央部の補修にテルミット反応法を適用する
には、コークス炉の操業トラブルの原因とならないよう
に壁面の平滑性を確保する必要があり、損傷部位に対す
る施工量の適正化をはかるには、その補修は容易ではな
い。
[0004] Recently, in the coke oven, a slant production for increasing the production is performed in a specific furnace group from the viewpoint of improving the productivity. For this reason, damage progresses in the furnace group that has a heavy operation load, and it is necessary to improve work efficiency including shortening repair time. On the other hand, in coke ovens with reduced productivity, damage frequently occurs due to the high frequency of changes in operating load,
The amount of repair work itself has increased. In particular, with the progress of furnace age, the occurrence and growth of wall cracks in the central part of the furnace became remarkable, and new repairs became necessary. Conventionally, the kiln mouth of a coke oven has been repaired by the thermite reaction method, but in order to apply the thermite reaction method to the repair of the central part of the furnace, the wall surface must be smooth so as not to cause operational troubles in the coke oven. Therefore, it is not easy to repair the damaged part in order to optimize the construction amount.

【0005】テルミット反応法に基づく従来の溶射補修
装置は、図2にその一例を示すごとく、直管状の混合室
1、該混合室に開口する粉体搬送ガス導入配管2および
酸素ガス導入配管3と、混合室先端に突設した溶射ノズ
ル4とから構成されており、混合室1において粉体搬送
ガス導入配管2より導入される粉体と酸素ガス導入配管
3より導入される純酸素ガスが混合されて、溶射ノズル
4より吐出する構造となっている。
A conventional thermal spray repair apparatus based on the Thermit reaction method has a straight tubular mixing chamber 1, a powder carrier gas introducing pipe 2 and an oxygen gas introducing pipe 3 opening into the mixing chamber 1, as shown in FIG. And a spraying nozzle 4 protruding from the tip of the mixing chamber, the powder introduced through the powder carrying gas introduction pipe 2 and the pure oxygen gas introduced through the oxygen gas introduction pipe 3 in the mixing chamber 1 The structure is such that they are mixed and discharged from the spray nozzle 4.

【0006】[0006]

【発明が解決しようとする課題】しかし、従来の溶射補
修装置は、耐火性粒子、酸化性粒子および酸素ガスは単
純な混合状態で、該混合室の管軸方向に突設した溶射ノ
ズルより吐出させる構造であるため、以下に記載する問
題点を有している。
However, in the conventional thermal spray repair apparatus, refractory particles, oxidizing particles and oxygen gas are simply mixed and discharged from the thermal spray nozzle projecting in the axial direction of the pipe of the mixing chamber. Since this structure is used, it has the following problems.

【0007】(1) 例えばコークス炉の補修に適用する場
合、装炭孔および炭化室炉内幅寸法の制約と逆火への安
全対策の点から形状に大きい制約を生じ、また最良の溶
融状態を得るために常に一定の溶射距離を維持するため
には、溶射ノズル自体の長さを可変構造とする必要があ
り、装置のコンパクト化に支障をきたす。 (2) 粉体と酸素ガスの均一な混合状態を得るために必要
十分な長さ、容積あるいは形状については明確化されて
いないため、溶射ノズルから吐出する粉体とガスとの混
合状態が不安定となり易い。このため着火が安定しない
ばかりでなく、生成するフレームの長さや形状に変動が
生じ、その変動が大きい場合には失火したりする等、溶
射の安定維持に難点がある。 (3) コークス炉の中央部炉壁に生じた亀裂に対し、壁面
の平滑性を損わずに的確に補修することが困難である。
(1) For example, when applied to repairing a coke oven, there are large restrictions on the shape due to restrictions on the width of the charging hole and the inner width of the furnace in the carbonization chamber, and safety measures against flashback, and the best molten state. In order to maintain a constant spraying distance, the length of the spraying nozzle itself must be variable, which hinders downsizing of the apparatus. (2) Since the length, volume, or shape necessary and sufficient to obtain a uniform mixed state of powder and oxygen gas have not been clarified, the mixed state of powder and gas discharged from the spray nozzle is unclear. Easy to be stable. Therefore, not only the ignition is not stable, but also the length and shape of the generated flame fluctuate, and if the fluctuation is large, there is a problem in maintaining stable spraying, such as misfire. (3) It is difficult to properly repair cracks in the central wall of the coke oven without damaging the smoothness of the wall.

【0008】この発明は、このような現状にかんがみ
て、テルミット反応法に基づく従来の溶射装置の前記問
題点を解決し、コークス炉等の炉壁補修を十分にかつ効
率よく行うことができる溶射補修装置を提案しようとす
るものである。
In view of the above situation, the present invention solves the above-mentioned problems of the conventional thermal spraying apparatus based on the Thermite reaction method, and can sufficiently and efficiently repair the furnace wall of a coke oven or the like. It is intended to propose a repair device.

【0009】[0009]

【課題を解決するための手段】本発明者らは、テルミッ
ト反応法に基づく耐火材料の溶射方法により安定した着
火を確保し、さらに良好かつ安定したフレームが得られ
る溶射装置の構造について種々検討を重ねた結果、混合
室にガスと粉体の混合流体の攪拌室を付帯させることに
よってガスと粉体の良好な混合状態が得られ、さらに溶
射ノズルをT字形に配置させることによって、混合室の
小容量化と着火および生成フレームの安定化がはから
れ、良好な施工が可能となることを知見した。
Means for Solving the Problems The present inventors have made various studies on the structure of a thermal spraying device capable of securing stable ignition by a thermal spraying method of a refractory material based on the Thermit reaction method and obtaining a good and stable flame. As a result of stacking, a good mixing state of the gas and the powder was obtained by adding a stirring chamber for the mixed fluid of the gas and the powder to the mixing chamber, and by further disposing the spray nozzle in the T shape, It was found that the capacity can be reduced and the ignition and the generation frame can be stabilized, and good construction is possible.

【0010】この発明は、このような知見に基づいてな
されたもので、その要旨は、金属粉を含む粉体および酸
素ガスとをノズル吐出口前で混合する方式のテルミット
反応を利用した溶射補修装置であって、前記金属粉を含
む粉体および酸素ガスの混合室に酸素流入口が開口し、
該混合室の末端部に前記混合流体の攪拌室を有し、この
攪拌室と混合室との間からT字形に分岐する溶射ノズル
を備えたことを特徴とし、また混合室に流入する酸素の
流入角度を混合室の軸心に対して10〜90度に設定す
ることを特徴とする溶射補修装置である。
The present invention has been made on the basis of such knowledge, and the gist thereof is a thermal spray repair utilizing a thermite reaction of a method of mixing powder containing metal powder and oxygen gas in front of a nozzle discharge port. An apparatus, wherein an oxygen inlet is opened in a mixing chamber of powder containing the metal powder and oxygen gas,
The mixing chamber is provided with a stirring chamber for the mixed fluid at the end portion thereof, and a thermal spraying nozzle branched in a T shape from between the stirring chamber and the mixing chamber is provided. The spraying repair apparatus is characterized in that the inflow angle is set to 10 to 90 degrees with respect to the axis of the mixing chamber.

【0011】[0011]

【作用】この発明において、純酸素気流と粉体搬送ガス
気流とをそれぞれ別ラインで溶射ノズルに送給し、該ノ
ズル吐出口前で混合する方式の溶射装置を採用したの
は、逆火あるいはノズルの詰り等のトラブル防止と、粒
子混合粉体およびガスの供給の円滑化を考慮したためで
ある。
In this invention, a pure oxygen flow and a powder-carrying gas flow are separately fed to the spray nozzle and mixed in front of the nozzle discharge port. This is because the prevention of troubles such as nozzle clogging and the smooth supply of the mixed powder of particles and the gas are taken into consideration.

【0012】粉体を構成する耐火性粒子としては、例え
ばSiO純度95%以上の仮焼珪石と、酸化性粒子と
してAl、Si粉を混合したものを用いる。ただし、材
料の発熱速度や溶融速度の良否を考慮して、粒度構成と
しては500μm〜0.5μmの粒径とするのが好まし
い。
As the refractory particles constituting the powder, for example, a mixture of calcined silica stone having a SiO 2 purity of 95% or more and Al and Si powders as the oxidizing particles is used. However, in consideration of the heat generation rate and the melting rate of the material, it is preferable that the particle size constitution is 500 μm to 0.5 μm.

【0013】この発明における攪拌室は、混合室の末端
部を例えば盲壁とし、この盲壁により作られる空間部で
構成することができる。したがって、混合室内で混合さ
れた粉体とガスの混合流体は、さらに攪拌室の盲壁に衝
突して攪拌されることにより均一に混合される。この攪
拌室で均一に混合されたガスと粉体の混合流体は、混合
室と攪拌室との間からT字形に分岐接続した溶射ノズル
から吐出する。
In the stirring chamber according to the present invention, the end of the mixing chamber may be, for example, a blind wall, and the stirring chamber may be composed of a space formed by the blind wall. Therefore, the mixed fluid of the powder and the gas mixed in the mixing chamber is further collided with the blind wall of the stirring chamber and stirred to be uniformly mixed. The mixed fluid of gas and powder that has been uniformly mixed in the stirring chamber is discharged from a spraying nozzle that is branched and connected in a T-shape between the mixing chamber and the stirring chamber.

【0014】また、混合室に流入する酸素の流入角度を
混合室の軸心、すなわち粉体搬送ガス気流の流れ方向に
対して10〜90度の範囲に設定することとしたのは、
10度未満では混合室の内壁に沿って酸素ガスが流れる
ことにより粉体搬送ガス気流との混合が不十分となり、
他方、90度を超えると酸素ガスが粉体搬送ガス気流の
流れに逆らうことになりガスと粉体の混合が不安定とな
るためである。
Further, the reason for setting the inflow angle of oxygen flowing into the mixing chamber within the range of 10 to 90 degrees with respect to the axial center of the mixing chamber, that is, the flow direction of the powder carrying gas stream is
If it is less than 10 degrees, the oxygen gas flows along the inner wall of the mixing chamber, resulting in insufficient mixing with the powder carrier gas flow,
On the other hand, when the temperature exceeds 90 degrees, the oxygen gas opposes the flow of the powder-carrying gas stream, and the mixing of the gas and the powder becomes unstable.

【0015】上記のごとく、混合室の末端部に衝突作用
によって混合流体を攪拌する攪拌室を設け、この攪拌室
と混合室との間から溶射ノズルをT字形に分岐接続させ
ることにより、ガスと粉体の均一な混合が得られ、着火
およびフレームが安定する。さらに、混合室に流入する
酸素の流入角度の適正化により、混合室でのガスと粉体
の混合がより一層良好となる。したがって、酸素ガスと
粉体の混合室を小容量化できることにより溶射装置の小
型化がはかられ、溶射距離の短い溶射補修が可能とな
る。
As described above, a stirring chamber for stirring the mixed fluid by a collision action is provided at the end of the mixing chamber, and a spray nozzle is branched and connected in a T-shape between the stirring chamber and the mixing chamber to generate gas. A homogeneous mixture of powders is obtained and ignition and flame are stable. Further, by optimizing the inflow angle of oxygen flowing into the mixing chamber, the mixing of the gas and the powder in the mixing chamber is further improved. Therefore, the volume of the mixing chamber of the oxygen gas and the powder can be reduced, so that the thermal spraying apparatus can be downsized and the thermal spraying repair with a short thermal spraying distance can be performed.

【0016】[0016]

【実施例】図1はこの発明に係る溶射補修装置の一例を
示す概略図で、11は混合室、12は粉体搬送ガス導入
配管、13は酸素ガス導入配管、14は溶射ノズル、1
5は攪拌室である。
1 is a schematic view showing an example of a thermal spray repair apparatus according to the present invention, 11 is a mixing chamber, 12 is a powder carrying gas introducing pipe, 13 is an oxygen gas introducing pipe, 14 is a spray nozzle, 1
5 is a stirring chamber.

【0017】すなわち、混合室11と攪拌室15は同一
管体で構成し、混合室11の末端部を盲壁として攪拌室
15を設けている。この攪拌室15と混合室11との間
(境界部)に溶射ノズル14をT字形に分岐接続してい
る。酸素ガス導入配管13は粉体搬送ガス導入配管12
とは別ラインで混合室11の側壁部に接続されている。
混合室11の軸芯と酸素ガス導入配管とのなす角度、す
なわち酸素ガス流入角度θは10〜90度に設定され
る。なお、酸素ガス導入配管13の接続位置は特に限定
するものではなく、混合室の側壁の任意位置とする。
That is, the mixing chamber 11 and the stirring chamber 15 are formed of the same pipe, and the stirring chamber 15 is provided with the end of the mixing chamber 11 as a blind wall. A thermal spray nozzle 14 is branched and connected in a T shape between the stirring chamber 15 and the mixing chamber 11 (boundary). The oxygen gas introducing pipe 13 is the powder carrying gas introducing pipe 12
It is connected to the side wall of the mixing chamber 11 by a line separate from.
The angle formed by the axis of the mixing chamber 11 and the oxygen gas introduction pipe, that is, the oxygen gas inflow angle θ is set to 10 to 90 degrees. The connection position of the oxygen gas introduction pipe 13 is not particularly limited and may be an arbitrary position on the side wall of the mixing chamber.

【0018】溶射ノズル14の吐出口径aは、材料供給
量によって異なるが、通常5.5mmφ〜12mmφ、
望ましくは7.5mmφである。例えば、材料供給量が
150〜500g/minの条件下では、5.5mmφ
未満の場合ノズル先端での詰りが生じ易く、他方、12
mmφを超えると被溶射体のビード幅が20mm以上と
大きくなりすぎるばかりでなく、金属粉の拡散が大き
く、着火の持続が困難となる。また、この溶射ノズル1
4の長さnは、特に限定するものではないが、40〜2
00mmの範囲が適当である。すなわち、40mm未満
ではガス粉体の混合流体が整流とならず、フレームが分
散ぎみとなり付着性が悪くなり、他方、200mmを超
えると、壁面との十分な距離を確保できず実用的でない
からである。なお、実際には付着率、距離調整の自由
度、フレームの安定性を考慮すると、70〜90mmが
好適である。また、この溶射ノズル14の分岐接続角度
θは特に限定するものではないが、通常は混合室11
の軸心に対して直角に接続する。
The discharge port diameter a of the thermal spray nozzle 14 varies depending on the material supply amount, but is usually 5.5 mmφ to 12 mmφ,
Desirably, it is 7.5 mmφ. For example, under the condition that the material supply amount is 150 to 500 g / min, 5.5 mmφ
If less than 12, clogging at the nozzle tip is likely to occur, while on the other hand, 12
If it exceeds mmφ, not only the bead width of the material to be sprayed becomes too large as 20 mm or more, but also the diffusion of the metal powder is large and it becomes difficult to sustain the ignition. Also, this spray nozzle 1
The length n of 4 is not particularly limited, but is 40 to 2
A range of 00 mm is suitable. That is, if it is less than 40 mm, the mixed fluid of the gas powder is not rectified and the frame becomes dispersed and the adhesion is deteriorated. On the other hand, if it exceeds 200 mm, it is not practical because a sufficient distance to the wall surface cannot be secured. is there. Actually, considering the adhesion rate, the degree of freedom of distance adjustment, and the stability of the frame, 70 to 90 mm is preferable. Further, the branch connection angle θ 1 of the spray nozzle 14 is not particularly limited, but usually the mixing chamber 11
Connect at right angles to the axis center of.

【0019】混合室11の直径Rは、特に限定するもの
ではないが、通常はノズルの吐出口径aの1〜1.5倍
程度の大きさを必要とする。これは、R/aが1/1未
満では均一な混合が得られにくく、フレームの生成に変
動をきたし、他方、R/aが1.5/1を超えると、混
合の均一化に影響をおよぼすことはないが、酸素ガスの
流入位置によってはフレームの生成に変動をきたすため
である。
The diameter R of the mixing chamber 11 is not particularly limited, but it is usually required to be about 1 to 1.5 times the discharge port diameter a of the nozzle. This is because if R / a is less than 1/1, it is difficult to obtain uniform mixing, which causes fluctuations in frame generation. On the other hand, if R / a exceeds 1.5 / 1, uniform mixing is affected. Although it does not affect, the generation of the flame fluctuates depending on the inflow position of the oxygen gas.

【0020】また、攪拌室15の長さmは、ノズルの吐
出口径aより長く、混合室11の直径Rより短くするの
が好ましい。これは、攪拌室15の長さmがノズルの吐
出口径aより短いと、粉体を構成する耐火性粒子(粗
粒)と金属粉(微粒)との分離が生じ、溶射に支障をき
たすからである。特に、攪拌室15の長さmが5mm未
満となると、この攪拌室内壁の摩耗が生じトラブルの原
因となる。他方、攪拌室15の長さmを混合室11の直
径Rより長くすると、該攪拌室で材料の滞留が顕著とな
りノズル詰りや逆火の原因となる。
Further, the length m of the stirring chamber 15 is preferably longer than the discharge port diameter a of the nozzle and shorter than the diameter R of the mixing chamber 11. This is because if the length m of the stirring chamber 15 is shorter than the discharge port diameter a of the nozzle, the refractory particles (coarse particles) and the metal powder (fine particles) forming the powder are separated from each other, which hinders thermal spraying. Is. In particular, if the length m of the stirring chamber 15 is less than 5 mm, the inner wall of the stirring chamber is abraded and causes trouble. On the other hand, if the length m of the stirring chamber 15 is made longer than the diameter R of the mixing chamber 11, the retention of the material becomes remarkable in the stirring chamber 15, which causes nozzle clogging and flashback.

【0021】混合室11の長さlは、構造上酸素ガス流
入角度θによって決まる。すなわち、酸素ガス流入角度
θが10〜90度の範囲では、混合室11の長さlは通
常90mm以下とするのが好ましい。その理由は、90
mmを超える長さは、粉体とガスの混合には影響はない
が、図面では省略している配管、ノズル冷却ジャケッ
ト、ノズル駆動部等、他の内蔵部品との関係で不要であ
るためである。
The length 1 of the mixing chamber 11 is structurally determined by the oxygen gas inflow angle θ. That is, when the oxygen gas inflow angle θ is in the range of 10 to 90 degrees, the length 1 of the mixing chamber 11 is usually preferably 90 mm or less. The reason is 90
The length over mm does not affect the mixing of powder and gas, but is unnecessary because of the relationship with other built-in parts such as piping, nozzle cooling jacket, nozzle drive part, etc. which are omitted in the drawing. is there.

【0022】実施例1 上記図1に示す溶射補修装置を用い、該装置の混合室長
さ、攪拌室長さ、溶射ノズル長さ、酸素ガス流入角度θ
を種々変えて、950℃に予熱した試験炉で溶射テスト
を実施した。本実施例における溶射補修装置の条件を表
1に、溶射結果を表2にそれぞれ示す。表2には比較の
ため、構造同一で、前記各部の長さおよび酸素ガス流入
角度θが好適な値を外れた溶射装置を使用した場合と、
図2に示す従来装置を使用した場合を併せて示す。
Example 1 Using the thermal spray repair apparatus shown in FIG. 1, the mixing chamber length, stirring chamber length, thermal spray nozzle length and oxygen gas inflow angle θ of the apparatus were used.
Was changed variously, and the thermal spraying test was carried out in a test furnace preheated to 950 ° C. Table 1 shows the conditions of the thermal spray repair apparatus in this example, and Table 2 shows the thermal spray results. For comparison, Table 2 shows the case of using a thermal spraying device having the same structure and the lengths of the respective parts and the oxygen gas inflow angle θ being out of the suitable values,
The case where the conventional apparatus shown in FIG. 2 is used is also shown.

【0023】本実施例では、Al粉1%、Si粉12%
を金属粉として含むシリカ質材料を用い、溶射装置の走
行速度を1.0m/minで操作し、溶射距離を45m
m、材料供給量を320g/minとし、固気比1.0
〜2.0の範囲で酸素ガス量を調整し、試験炉内壁に長
さ1.3mのビードの施工体を形成した。なお、粉体搬
送ガス中の酸素濃度は、別に酸素ガス付加を行なって2
5%一定とした。溶射装置の材質は、SUS304であ
った。
In this embodiment, Al powder 1% and Si powder 12%
Using a siliceous material containing as a metal powder, the traveling speed of the spraying device is operated at 1.0 m / min, and the spraying distance is 45 m
m, the material supply rate is 320 g / min, and the solid-gas ratio is 1.0
The amount of oxygen gas was adjusted in the range of up to 2.0 to form a beaded body having a length of 1.3 m on the inner wall of the test furnace. It should be noted that the oxygen concentration in the powder-carrying gas can be adjusted to 2 by adding oxygen gas separately.
It was fixed at 5%. The material of the thermal spraying device was SUS304.

【0024】表2の結果より明らかなごとく、攪拌室を
有しない従来の溶射装置では、着火不能のため試験炉内
壁に長さ1.3mmのビードの施工体を形成することが
できなかったのに対し、本発明装置の場合は、混合室、
攪拌室、ノズル長さおよび酸素ガス流入角度θが好適な
値の溶射装置を使用した場合、着火性、付着性、溶射状
況共に良好であった。なお、構造的には同一でも、混合
室、攪拌室、ノズル長さおよび酸素ガス流入角度θが好
適な値を外れた溶射装置を使用した場合には、1.3m
mのビードの施工体の形成が困難であった。
As is clear from the results shown in Table 2, in the conventional thermal spraying apparatus having no stirring chamber, it was not possible to form a beaded body having a length of 1.3 mm on the inner wall of the test furnace because the ignition was impossible. On the other hand, in the case of the device of the present invention, the mixing chamber,
When the thermal spraying device having suitable values for the stirring chamber, the nozzle length and the oxygen gas inflow angle θ was used, the ignitability, the adhesiveness and the thermal spraying condition were good. Even if they are structurally the same, if a mixing chamber, a stirring chamber, a nozzle length, and a thermal spraying device in which the oxygen gas inflow angle θ deviates from suitable values, 1.3 m
It was difficult to form a construction body of m beads.

【0025】[0025]

【表1】 [Table 1]

【0026】[0026]

【表2】 [Table 2]

【0027】[0027]

【発明の効果】以上説明したごとく、この発明によれ
ば、溶射ノズルから吐出する粉体とガスとの混合状態を
適正にかつ安定化させることができるので、着火不良や
フレームの生成変動を防止することができるのみなら
ず、逆火等のトラブルも皆無となり、溶射を効率よく安
定して行うことができるという優れた効果を奏する。し
たがって、従来のテルミット反応法による溶射補修装置
では十分に補修することができなかったコークス炉の中
央部における亀裂等の損傷に対しても、的確にかつ効率
よく補修することができ、炉の延命に大きく貢献するも
のである。
As described above, according to the present invention, it is possible to properly and stabilize the mixed state of the powder and the gas discharged from the thermal spray nozzle, so that it is possible to prevent the ignition failure and the generation variation of the frame. In addition to the above, there is no trouble such as flashback, and the excellent effect is obtained that the thermal spraying can be performed efficiently and stably. Therefore, damages such as cracks in the central part of the coke oven, which could not be sufficiently repaired by the conventional thermal spray repair equipment by thermite reaction method, can be repaired accurately and efficiently, and the life of the furnace can be extended. Greatly contribute to.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明に係る溶射補修装置の一例を示す概略
図である。
FIG. 1 is a schematic view showing an example of a thermal spray repair apparatus according to the present invention.

【図2】従来の溶射補修装置の一例を示す概略図であ
る。
FIG. 2 is a schematic view showing an example of a conventional thermal spray repair device.

【符号の説明】[Explanation of symbols]

11 混合室 12 粉体搬送ガス導入配管 13 酸素ガス導入配管 14 溶射ノズル 15 攪拌室 11 Mixing Chamber 12 Powder Conveying Gas Introducing Pipe 13 Oxygen Gas Introducing Pipe 14 Thermal Spray Nozzle 15 Stirring Chamber

───────────────────────────────────────────────────── フロントページの続き (72)発明者 沼沢 誠 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Numazawa 4-5-3 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 金属粉を含む粉体および酸素ガスとをノ
ズル吐出口前で混合する方式のテルミット反応を利用し
た溶射補修装置であって、前記金属粉を含む粉体および
酸素ガスの混合室に酸素流入口が開口し、該混合室の末
端部に前記混合流体の攪拌室を有し、この攪拌室と混合
室との間からT字形に分岐する溶射ノズルを備えたこと
を特徴とする溶射補修装置。
1. A thermal spray repair apparatus using a thermite reaction of a method of mixing powder containing metal powder and oxygen gas in front of a nozzle discharge port, wherein a mixing chamber for powder containing metal powder and oxygen gas is used. An oxygen inlet is opened at the end of the mixing chamber, a stirring chamber for the mixed fluid is provided at the end of the mixing chamber, and a spraying nozzle is provided which branches in a T-shape between the stirring chamber and the mixing chamber. Thermal spray repair equipment.
【請求項2】 混合室に流入する酸素の流入角度を混合
室の軸心に対して10〜90度に設定することを特徴と
する請求項1記載の溶射補修装置。
2. The thermal spray repair apparatus according to claim 1, wherein the inflow angle of oxygen flowing into the mixing chamber is set to 10 to 90 degrees with respect to the axis of the mixing chamber.
JP4255830A 1992-08-31 1992-08-31 Thermal spray repair equipment Expired - Lifetime JP2699778B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4255830A JP2699778B2 (en) 1992-08-31 1992-08-31 Thermal spray repair equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4255830A JP2699778B2 (en) 1992-08-31 1992-08-31 Thermal spray repair equipment

Publications (2)

Publication Number Publication Date
JPH0671200A true JPH0671200A (en) 1994-03-15
JP2699778B2 JP2699778B2 (en) 1998-01-19

Family

ID=17284202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4255830A Expired - Lifetime JP2699778B2 (en) 1992-08-31 1992-08-31 Thermal spray repair equipment

Country Status (1)

Country Link
JP (1) JP2699778B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005206727A (en) * 2004-01-23 2005-08-04 Nippon Steel Corp Method for repairing furnace wall of carbonizing chamber
WO2014112559A1 (en) * 2013-01-17 2014-07-24 株式会社ニコン Spray nozzle, spraying processing device, processing method, method for manufacturing cell material, and secondary cell
JP2020059899A (en) * 2018-10-12 2020-04-16 黒崎播磨株式会社 Flame spraying method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005206727A (en) * 2004-01-23 2005-08-04 Nippon Steel Corp Method for repairing furnace wall of carbonizing chamber
WO2014112559A1 (en) * 2013-01-17 2014-07-24 株式会社ニコン Spray nozzle, spraying processing device, processing method, method for manufacturing cell material, and secondary cell
CN104937138A (en) * 2013-01-17 2015-09-23 株式会社尼康 Spray nozzle, spraying processing device, processing method, method for manufacturing cell material, and secondary cell
JP2020059899A (en) * 2018-10-12 2020-04-16 黒崎播磨株式会社 Flame spraying method

Also Published As

Publication number Publication date
JP2699778B2 (en) 1998-01-19

Similar Documents

Publication Publication Date Title
US5013499A (en) Method of flame spraying refractory material
US7896647B2 (en) Combustion with variable oxidant low NOx burner
GB2035524A (en) Flame spraying refractory material
CN201242149Y (en) Burner system
JP3189729B2 (en) Thermal spray equipment for refractory repair and repair method by thermal spraying of refractory
JP2699778B2 (en) Thermal spray repair equipment
AU732176B2 (en) Lance for heating or ceramic welding
CN110603335B (en) Method and burner for heating a furnace for metal working
EP0745428B1 (en) Flame spraying burner
JP3016106B2 (en) Repair method for thermal spraying of kiln
JP2783085B2 (en) Thermal spraying method for refractory materials
JPH09248497A (en) Method and apparatus for flame spraying of refractory
JP3551604B2 (en) Flame spraying method
JP2007284707A (en) Thermal spraying method
SU1305177A1 (en) Method for flame concrete spraying of converter lining and gun for effecting same
SU979511A1 (en) Method for spray gunting of metal production units
JP2807165B2 (en) Oxygen burner
SU964006A1 (en) Tuyere for spray guniting of lining of metal production units
RU2036186C1 (en) Method and apparatus to form refractory cover on lining working surface
JP3513963B2 (en) Flame spray repair material
JP2886070B2 (en) Hot spray repair nozzle
JPH0156831B2 (en)
RU2047067C1 (en) Installation for repairing metallurgical aggregates by ceramic fusion on
RU2108397C1 (en) Method of vortex concrete spraying of cylindrical linings and device for its embodiment
AU600923B2 (en) Tuyere for torch guniting of metallurgical plant