JP2005336001A - Thermal spraying material - Google Patents
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- JP2005336001A JP2005336001A JP2004155713A JP2004155713A JP2005336001A JP 2005336001 A JP2005336001 A JP 2005336001A JP 2004155713 A JP2004155713 A JP 2004155713A JP 2004155713 A JP2004155713 A JP 2004155713A JP 2005336001 A JP2005336001 A JP 2005336001A
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本発明は、工業炉、金属溶融容器等の耐火物損耗部位の補修等に使用する溶射材料に
関するものであり、特にその材料に含まれる金属粒子の酸化発熱反応により耐火性粒子、
低融点粒子を溶融し、被補修体に溶着させて、工業炉、金属溶融容器等の中でも、特に珪
石れんがを使用しているコークス炉炭化室の補修に適する溶射材料に関するものである。
The present invention relates to a thermal spray material used for repairing a refractory worn part such as an industrial furnace, a metal melting vessel, etc., in particular, refractory particles by oxidation exothermic reaction of metal particles contained in the material,
The present invention relates to a thermal spray material suitable for repairing a coke oven carbonization chamber using silica brick, among industrial furnaces, metal melting vessels, etc., by melting low melting point particles and welding them to a repair object.
製鉄所のコークス炉は、建設してから２０年以上のものが多く、特に炭化室の壁の補
修が必要である。操業しながら補修する技術として溶射補修法がある。溶射補修法には、
プラプマ溶射、レーザー溶射、火炎溶射があるが、大掛かりな装置が必要である。
Many steelworks coke ovens have been built for over 20 years, and especially the walls of the carbonization chamber need to be repaired. There is a thermal spray repair method as a technique for repairing while operating. Thermal spray repair methods include
There are plastic spraying, laser spraying, and flame spraying, but large-scale equipment is required.
一方、テルミット反応等の金属粉の酸化燃焼反応熱で耐火粒子を溶融させ、補修面に
溶着させる方法がある。この方法は、金属粒子と耐火粒子の混合物を酸素で高熱の補修面
に吹き付け、金属粒子の酸化反応熱で耐火粒子を溶融し、溶着させる方式であるため、装
置が簡易である特徴を有する。
On the other hand, there is a method in which refractory particles are melted by heat of oxidation combustion reaction of metal powder such as thermite reaction and welded to the repair surface. This method has a feature that the apparatus is simple because a mixture of metal particles and refractory particles is sprayed on a repair surface having high heat with oxygen, and the refractory particles are melted and welded by heat of oxidation reaction of the metal particles.
従来の耐火粒子としては、熱的な安定を図るため焼成された耐火粒子を用いるのが一
般的であり、特公平５−２１８６５号公報では耐火性粒体の少なくともいくらかが、ケル
ビン温度で表した融点の０．７倍を超える温度まで前もって焼成されたものを使用するこ
とが提案されている。また、特開平７−２３７９７９号公報では珪石または珪砂とジルコ
ンの混合物を、特開２０００−１５９５７９号公報では焼成珪石とコーチディライトの混
合物を使用することが提案されている。
As conventional refractory particles, it is common to use fired refractory particles for thermal stability, and in Japanese Patent Publication No. 5-21865, at least some of the refractory particles are expressed in Kelvin temperature. It has been proposed to use what has been previously calcined to a temperature exceeding 0.7 times its melting point. Japanese Patent Application Laid-Open No. 7-237379 proposes the use of silica or a mixture of silica sand and zircon, and Japanese Patent Application Laid-Open No. 2000-159579 proposes the use of a mixture of calcined silica and coached lite.
また、金属粒子としては、金属シリコン単一ではなく、金属アルミニウム、Ｍｇ−Ａ
ｌ合金、Ｃａ−Ｓｉ合金等が２種以上混合されたものを用いるのが一般的であった。たと
えば、特公平５−２１８６５号公報では金属シリコンに金属アルミニウム、Ｍｇ−Ａｌ合
金等が混合されたものを用い、特開２０００−１５９５７９号公報では金属シリコンに金
属アルミニウム、Ｍｇ−Ａｌ合金、Ｃａ−Ｓｉ合金等が混合されたものを用いることが提
案されている。
In general, a mixture of two or more of l alloy, Ca-Si alloy and the like is used. For example, Japanese Patent Publication No. 5-21865 uses a mixture of metallic silicon and metallic aluminum, Mg—Al alloy, etc., and Japanese Patent Application Laid-Open No. 2000-159579 discloses metallic silicon with metallic aluminum, Mg—Al alloy, Ca— It has been proposed to use a mixture of Si alloy and the like.
近年のコークス炉は、使用条件の過酷化や炉寿命の長期延命化といった要求があり、
従来の補修材より長寿命化が要求される。特に、コークス炉の炭化室は冷たい石炭粉を入
れ、それを蒸し焼きにしてコークスにするため、加熱冷却が繰り返される。
In recent years, coke ovens have demands such as severe use conditions and long life of the furnace,
Longer life is required than conventional repair materials. In particular, the coking oven carbonization chamber is repeatedly heated and cooled in order to put cold coal powder and steam it into coke.
コークス炉の炭化室に使用されている珪石れんがと補修材の熱膨張を近似させること
で、長期間使用時のれんが面からの剥離損耗を抑制できるが、溶射直後は材料が溶融して
ガラス化しているので、これが結晶化するとき膨張があり、その膨張がれんがと補修材の
接着強度を低下させる。これを防止または抑制するためには溶射と同時に結晶化させるこ
とが重要課題であった。
By approximating the thermal expansion of silica bricks and repair materials used in coking ovens in coke ovens, it is possible to suppress delamination wear from the brick surface during long-term use, but the material melts and vitrifies immediately after spraying. Therefore, when this crystallizes, it expands, and the expansion reduces the adhesive strength of the brick and the repair material. In order to prevent or suppress this, it was important to crystallize simultaneously with thermal spraying.
本発明は、上記のような点に鑑みたもので、上記の課題を解決するために、耐火性粒
子、金属粒子、結晶化促進剤の混合物を酸素と共に高温の被補修体に吹き付け、金属粒子
の酸化発熱反応により混合物を溶融させて被補修体に溶着させてなる溶射材料であって、
耐火粒子が未焼成の珪石または珪砂で、金属粒子が金属シリコン、結晶化促進剤がナトリ
ウム塩、カリウム塩、リチウム塩の１種または複数を含むことを特徴とする溶射材料を提
供するものである。
The present invention has been made in view of the above points, and in order to solve the above-mentioned problems, a mixture of refractory particles, metal particles, and a crystallization accelerator is sprayed onto a high-temperature repaired object together with oxygen to obtain metal particles. A thermal spray material obtained by melting the mixture by an oxidation exothermic reaction and welding the mixture to a repaired body,
The present invention provides a thermal spray material characterized in that the refractory particles are unfired silica stone or silica sand, the metal particles are metal silicon, and the crystallization accelerator contains one or more of sodium salt, potassium salt and lithium salt. .
特に、耐火性粒子の粒度は、６００μｍ以上が1O重量％以下で、４２５〜２０００μ
ｍが３０〜６０重量％とし、７５μｍ以下が１０重量％以下で、７５〜４２５μｍがその
残りであることを特徴とする溶射材料を提供するものである。
In particular, the particle size of the refractory particles is 600 μm or more and 10% by weight or less, and 425 to 2000 μm.
The thermal spray material is characterized in that m is 30 to 60% by weight, 75 μm or less is 10% by weight or less, and 75 to 425 μm is the remainder.
また、金属シリコン粒子はその添加量が１０〜３０重量％であって、その粒度は１５
０μｍ以上が１０重量％以下で、２０〜３００μｍが５〜５０重量％で、２μｍ以下が１
０〜４０重量％で、２〜２０μｍがその残りである溶射材料、結晶化促進剤はナトリウム
塩、カリウム塩、リチウム塩の１種または複数からなり、その添加量は０．３〜１０重量
％である溶射材料、発火点が２００℃以上、８００℃以下である炭素系粉末を１０重量％
以下で、着火促進剤として添加する溶射材料、平均粒径が０．２μｍ以下であるシリカ粉
末を５重量％以下で、粉体流動化促進剤として添加する溶射材料をそれぞれ提供するもの
である。
Moreover, the addition amount of the metal silicon particles is 10 to 30% by weight, and the particle size is 15%.
0 μm or more is 10% by weight or less, 20 to 300 μm is 5 to 50% by weight, and 2 μm or less is 1%.
Thermal spray material with 0 to 40% by weight and 2 to 20 μm remaining, crystallization accelerator is composed of one or more of sodium salt, potassium salt and lithium salt, and the addition amount is 0.3 to 10% by weight 10% by weight of a carbon-based powder having an ignition point of 200 ° C. or higher and 800 ° C. or lower.
In the following, a thermal spray material to be added as an ignition accelerator and a thermal spray material to be added as a powder fluidization promoter at 5% by weight or less of silica powder having an average particle size of 0.2 μm or less are provided.
本発明は、耐火粒子が未焼成の珪石または珪砂で、金属粒子が金属シリコン、結晶化
促進剤がナトリウム塩、カリウム塩、リチウム塩の１種または複数を含むことによって、
炉壁のれんがとの熱膨張率を一致させることができ、かつ耐火性粒子を溶融させ、結晶化
を促進して良好な施工体を得ることができる。
In the present invention, the refractory particles are unfired silica stone or silica sand, the metal particles include metal silicon, and the crystallization accelerator includes one or more of sodium salt, potassium salt, lithium salt,
The thermal expansion coefficient can be matched with that of the bricks of the furnace wall, and the refractory particles can be melted to promote crystallization to obtain a good construction body.
また、耐火性粒子の粒度は６００μｍ以上が1O重量％以下で、４２５〜２０００μｍ
が３０〜６０重量％とし、７５μｍ以下が１０重量％以下で、７５〜４２５μｍがその残
りとすることによって、材料を脈動しないようにして良好に溶射でき、またリバウンドロ
スも少なく溶射することができる。
The particle size of the refractory particles is 600 μm or more and 10% by weight or less, and 425 to 2000 μm.
Is 30 to 60% by weight, 75 μm or less is 10% by weight or less and 75 to 425 μm is the remainder, so that the material can be thermally sprayed without pulsation and can be sprayed with little rebound loss. .
また、金属シリコン粒子は、その添加量が１０〜３０重量％であって、その粒度は１
５０μｍ以上が１０重量％以下で、２０〜３００μｍが５〜５０重量％で、２μｍ以下が
１０〜４０重量％で、２〜２０μｍがその残りとすることによって、燃焼反応よく耐火性
粒子を溶融できて、良好な溶射を行うことができる。
Further, the metal silicon particles are added in an amount of 10 to 30% by weight, and the particle size is 1
50 μm or more is 10% by weight or less, 20 to 300 μm is 5 to 50% by weight, 2 μm or less is 10 to 40% by weight, and 2 to 20 μm is the remainder, so that the refractory particles can be melted with good combustion reaction. And good thermal spraying can be performed.
さらに、結晶化促進剤は、ナトリウム塩、カリウム塩、リチウム塩の１種または複数
からなり、その添加量は０．３〜１０重量％とすることによって、結晶化の促進をはかれ
、良好な施工体を得ることができる。
Furthermore, the crystallization accelerator is composed of one or more of a sodium salt, a potassium salt, and a lithium salt, and by adding 0.3 to 10% by weight of the crystallization accelerator, the crystallization is promoted and good. A construction body can be obtained.
さらに、発火点が２００℃以上、８００℃以下である炭素系粉末を１０重量％以下で
、着火促進剤として添加することによって、タイミングよく溶射開始時に着火できて、上
記のように良好に溶射することができる。
Furthermore, by adding a carbon-based powder having an ignition point of 200 ° C. or higher and 800 ° C. or lower as an ignition accelerator at 10% by weight or less, it can be ignited at the start of thermal spraying with good timing and sprayed well as described above. be able to.
またさらに、平均粒径が０．２μｍ以下であるシリカ粉末を５重量％以下で、粉体流
動化促進剤として添加することによって、溶射材料の粉体流動化を促進できて良好に溶射
処理がはかれる。
Furthermore, by adding silica powder having an average particle size of 0.2 μm or less as 5% by weight or less as a powder fluidization accelerator, powder fluidization of the thermal spray material can be promoted, and the thermal spraying process can be performed well. Peeled off.
本発明の溶射材料は、耐火性粒子、金属粒子、結晶化促進剤の混合物を酸素と共に高
温の被補修体に吹き付け、金属粒子の酸化発熱反応により混合物を溶融させて被補修体に
溶着させる溶射材料であって、耐火粒子が未焼成の珪石または珪砂で、金属粒子が金属シ
リコン、結晶化促進剤がナトリウム塩、カリウム塩、リチウム塩の１種または複数を含む
ことを特徴としている。
The thermal spray material of the present invention is a thermal spraying method in which a mixture of refractory particles, metal particles, and a crystallization accelerator is sprayed onto a repair target at high temperature together with oxygen, and the mixture is melted by an oxidative exothermic reaction of the metal particles to be welded to the repair target. The material is characterized in that the refractory particles are unfired silica or silica sand, the metal particles include metal silicon, and the crystallization accelerator includes one or more of sodium salt, potassium salt, and lithium salt.
溶射材料を炉壁の珪石れんがとの熱膨張を適合させることにより、加熱冷却による補
修れんが面からの剥離を抑制し、耐用性の向上を図ることができるが、溶射による熱で耐
火性粒子が溶融されてガラス化すると、珪石れんがとの熱膨張を適合させることができな
い。そのため、これを防止する手段としては、溶射と同時に補修材を結晶化させることが
重要である。
By adapting the thermal expansion of the thermal spray material with the silica bricks of the furnace wall, it is possible to suppress delamination from the surface of the repair brick due to heating and cooling and to improve the durability. Once melted and vitrified, thermal expansion with silica brick cannot be accommodated. Therefore, as a means for preventing this, it is important to crystallize the repair material simultaneously with the thermal spraying.
耐火物粒子には、ＳｉＯ2 が９０重量％以上で、かつＡｌ2
Ｏ3 が１０重量％以下の高ＳｉＯ2 組成の原料を使用するこ
とを特徴とするが、好ましくはＳｉＯ2 が９５重量％以上であって、かつ
Ａｌ2 Ｏ3 が５重量％以下の高ＳｉＯ2 組成の原
料を使用するのが望ましい。Ａｌ2 Ｏ3 が１０重量％以上にな
ると結晶化を阻害し、炉壁れんがとの熱膨張が一致しなくなる。この耐火物粒子の原料と
しては、未焼成の珪石、珪砂があげられる。
The refractory particles include SiO 2 of 90% by weight or more and Al 2
A raw material having a high SiO 2 composition having an O 3 content of 10% by weight or less is used. Preferably, the SiO 2 content is 95% by weight or more, and an Al 2 O 3 content is 5% by weight or less. It is desirable to use two ingredients. When the Al 2 O 3 content is 10% by weight or more, crystallization is hindered and the thermal expansion of the furnace wall brick does not match. Examples of the raw material for the refractory particles include unfired silica stone and silica sand.
耐火性粒子の粒度は６００μｍ以上が１０重量％以下で、かつ４２５〜２０００μｍ
が３０〜６０重量％とし、７５μｍ以下が１０重量％以下で、７５〜４２５μｍがその残
りであることが望ましい。７５μｍ以下が１０重量％以上であると材料を溶射するときに
脈動し、良好な溶射ができな。また、６００μｍ以上のものは粒として残存し、溶射施工
体の結晶化を阻害するので１０重量％以下であることが望ましい。４２５μｍ以上のもの
が６０重量％以上あるとリバウンドが大きく、ロスが多くなって好ましくない。
The particle size of the refractory particles is 600 μm or more and 10% by weight or less, and 425 to 2000 μm.
Is preferably 30 to 60% by weight, 75 μm or less is 10% by weight or less, and 75 to 425 μm is the remainder. When 75 μm or less is 10% by weight or more, pulsation occurs when the material is sprayed, and good spraying cannot be performed. Moreover, since the thing of 600 micrometers or more remains as a particle | grain and inhibits crystallization of a thermal spraying construction body, it is desirable that it is 10 weight% or less. When the amount of 425 μm or more is 60% by weight or more, rebound is large and loss is increased, which is not preferable.
金属シリコン粒子は、その添加量が１０〜３０重量％であって、金属シリコン粒子の
粒度は１５０μｍ以上が１０重量％以下で、かつ２０〜３００μｍが５〜５０重量％で、
２μｍ以下が１０〜４０重量％で、２〜２０μｍがその残りであることが望ましい。金属
シリコン粒子の添加量が１０重量％以下であると、燃焼反応が弱く、耐火性粒子が溶融し
なく、良好な溶射ができない。添加量が３０重量％以上であると、材料を溶射したとき、
燃焼反応が強くなりすぎ、溶射体が流れ落ち、良好な溶射ができない。
The metal silicon particles have an addition amount of 10 to 30% by weight, and the particle size of the metal silicon particles is 150 μm or more and 10% by weight or less, and 20 to 300 μm is 5 to 50% by weight,
It is desirable that 2 μm or less is 10 to 40% by weight, and 2 to 20 μm is the remainder. When the addition amount of the metal silicon particles is 10% by weight or less, the combustion reaction is weak, the refractory particles do not melt, and good thermal spraying cannot be performed. When the amount of addition is 30% by weight or more, when the material is sprayed,
The combustion reaction becomes too strong, the sprayed material flows down, and good spraying cannot be performed.
また、金属シリコン粒子の粒度で１５０μｍ以上のものは燃焼反応が弱く好ましくな
いため、金属シリコン粒子の１０重量％以下でなければならない。２０〜３００μｍが金
属シリコン粒子の５０重量％以上でも燃焼反応が弱くなり好ましくない。２０〜３００μ
ｍが金属シリコン粒子の５重量％以下では脈動が大きくなり、良好な溶射ができない。２
μｍ以下のものが金属シリコン粒子の１０重量％以下のときも燃焼反応が弱くなり好まし
くない。また、２μｍ以下のものが金属シリコン粒子の４０重量％以上であると、材料を
溶射したとき、燃焼反応が強くなりすぎ、溶射体が流れ落ち、良好な溶射ができない。
In addition, the particle size of the metal silicon particles of 150 μm or more is not preferable because the combustion reaction is weak and should be 10% by weight or less of the metal silicon particles. Even if 20-300 micrometers is 50 weight% or more of a metal silicon particle, a combustion reaction becomes weak and is unpreferable. 20-300μ
When m is 5% by weight or less of the metal silicon particles, pulsation increases and good thermal spraying cannot be performed. 2
When the particle size is not more than 10 μm, the combustion reaction becomes weak, which is not preferable. Further, when the material of 2 μm or less is 40% by weight or more of the metal silicon particles, when the material is sprayed, the combustion reaction becomes too strong, the sprayed material flows down, and good spraying cannot be performed.
結晶化促進剤としては、ナトリウム塩、カリウム塩、リチウム塩の１種または複数か
らなることを特徴とする。結晶化促進剤の添加量は、０．３〜１０重量％が好ましく、０
．３重量％より少ないと結晶化促進の効果が小さく、10重量％より多いと溶射の際に溶射
体が流れ落ち、良好な施工体が得られない。ナトリウム塩としては、炭酸ナトリウム、塩
化ナトリウム、カリウム塩としては塩化カリウム、リチウム塩としては炭酸リチウム等が
あげられる。
The crystallization accelerator is characterized by comprising one or more of a sodium salt, a potassium salt and a lithium salt. The addition amount of the crystallization accelerator is preferably 0.3 to 10% by weight,
. If the amount is less than 3% by weight, the effect of promoting crystallization is small. If the amount is more than 10% by weight, the sprayed material flows down during spraying, and a good construction body cannot be obtained. Examples of sodium salts include sodium carbonate and sodium chloride, potassium salts include potassium chloride, and lithium salts include lithium carbonate and the like.
着火促進剤は、被溶射体の温度が９００℃以下である場合の溶射補修時に用いられる
溶射材料に添加される。発火点が２００〜８００℃である炭素系粉末からなることを特徴
とし、その添加量は外掛けで１０重量％以下であることが好ましい。着火促進剤の発火点
が８００℃以上であると、壁面温度が９００℃以下の場合、溶射開始時に着火しない。発
火点が２００℃以下であると爆発の危険が大きくなり、安全上好ましくない。
The ignition accelerator is added to the thermal spray material used during thermal spray repair when the temperature of the sprayed body is 900 ° C. or lower. It is characterized by comprising a carbon-based powder having an ignition point of 200 to 800 ° C., and its addition amount is preferably 10% by weight or less as an outer coating. When the ignition point of the ignition accelerator is 800 ° C. or higher, when the wall surface temperature is 900 ° C. or lower, ignition does not occur at the start of spraying. An ignition point of 200 ° C. or lower increases the risk of explosion, which is not preferable for safety.
着火促進剤が金属アルミニウムでは溶射施工体にＡｌ2 Ｏ3
が入り結晶化を阻害する。金属マグネシウムは、爆発の危険性が大きくなり、安全上好ま
しくない。炭素系粉末の方が燃焼性が良く、施工体に残留しないので好ましい。添加量が
外掛けで10重量％以上であると、溶射体に炭素系粉末が残留し、がラス化を阻害するので
好ましくない。炭素系粉末としては、コークス粉、木炭粉等があげられる。
When the ignition accelerator is metallic aluminum, the sprayed body is Al 2 O 3
Enters and inhibits crystallization. Metal magnesium increases the risk of explosion and is not preferable for safety. Carbon-based powders are preferable because they have good combustibility and do not remain in the construction body. If the addition amount is 10% by weight or more as an outer coating, the carbon-based powder remains on the sprayed body, but this is not preferable because it hinders lath formation. Examples of the carbon powder include coke powder and charcoal powder.
粉体流動化促進剤は、シリカ系粉末が望ましく、粒径は平均粒径が０．２μｍ以下で
あることが好ましい。その添加量は５重量％以下が望ましい。図２（ａ）のように漏斗に
材料を投入し、ストッパー棒を引き抜き、振動１Ｇを加えてその排出時間を測定する方法
で測定した結果、図２（ｂ）のように５重量％以上では流動化促進の効果が増加しない。
２重量％以下がより好ましいことが分かる。また、アルミナ系では結晶化を阻害するため
好ましくない。平均粒径の小さい金属粉、炭素系粉は、爆発の危険性が増し、安全上好ま
しくない。シリカ系粉末としてはヒューム状のシリカ粉末等があげられる。
The powder fluidization accelerator is preferably a silica-based powder, and the average particle size is preferably 0.2 μm or less. The addition amount is desirably 5% by weight or less. As shown in FIG. 2 (a), the material was put into the funnel, the stopper rod was pulled out, the vibration 1G was applied, and the discharge time was measured. As a result, as shown in FIG. The effect of promoting fluidization does not increase.
It turns out that 2 weight% or less is more preferable. In addition, an alumina system is not preferable because it inhibits crystallization. Metal powder and carbon-based powder having a small average particle size increase the risk of explosion and are not preferable for safety. Examples of the silica-based powder include fumed silica powder.
表１ 実施例の特性表
Ａ製鉄所のコークス炉でのテスト結果を表１および表２に示す。実施例１と比較例１
２と珪石れんがの熱間線膨張率を図１に示す。実施例１は、珪石れんがと同等の熱間線膨
張率を示し、加熱冷却による剥離に対して優れている。実施例５に粉体流動化促進剤を添
加し、粉体流動性の評価として有効である排出時間の関係を図２（ｂ）に示す。粉体流動
化促進剤の添加量が増えるほど、排出時間が短くなり流動性が向上したが、５重量％以上
ではその効果がさらに向上しない。表１のように実施例のものは、吐出性、着火性、燃焼
性、接着性が良好で、溶射作業性がよいもので、施工体の物性がよいことからコークス炉
での使用結果、高寿命を示している。
Tables 1 and 2 show the test results in the coke oven at A Steel Works. Example 1 and Comparative Example 1
The hot linear expansion coefficient of No. 2 and silica brick is shown in FIG. Example 1 shows a hot linear expansion coefficient equivalent to that of silica brick and is excellent for peeling by heating and cooling. FIG. 2B shows the relationship of the discharge time that is effective as an evaluation of powder fluidity when a powder fluidization accelerator is added to Example 5. As the amount of the powder fluidization accelerator increased, the discharge time was shortened and the fluidity was improved. However, the effect is not further improved at 5% by weight or more. As shown in Table 1, the examples have good discharge properties, ignitability, flammability, adhesion, good thermal spraying workability, and good physical properties of the construction body. Shows life.
表２ 比較例の特性表
Claims (6)
け、金属粒子の酸化発熱反応により混合物を溶融させて被補修体に溶着させてなる溶射材
料であって、
耐火粒子が未焼成の珪石または珪砂で、金属粒子が金属シリコン、結晶化促進剤がナ
トリウム塩、カリウム塩、リチウム塩の１種または複数を含むことを特徴とする溶射材料
。 A spraying material formed by spraying a mixture of refractory particles, metal particles, and a crystallization accelerator together with oxygen onto a high-temperature repair target, melting the mixture by oxidation exothermic reaction of the metal particles, and welding the mixture to the repair target,
A thermal spray material, characterized in that the refractory particles are unfired silica stone or silica sand, the metal particles include metal silicon, and the crystallization accelerator includes one or more of sodium salt, potassium salt, and lithium salt.
〜６０重量％とし、７５μｍ以下が１０重量％以下で、７５〜４２５μｍがその残りであ
ることを特徴とする請求項１に記載の溶射材料。 The particle size of the refractory particles is 600 μm or more and 10% by weight or less, and 425 to 2000 μm is 30%.
The thermal spray material according to claim 1, wherein the thermal spray material is ˜60 wt%, 75 μm or less is 10 wt% or less, and 75 to 425 μm is the remainder.
ｍ以上が１０重量％以下で、２０〜３００μｍが５〜５０重量％で、２μｍ以下が１０〜
４０重量％で、２〜２０μｍがその残りであることを特徴とする請求項１または２に記載
の溶射材料。 The metal silicon particles have an addition amount of 10 to 30% by weight and a particle size of 150 μm.
m or more is 10% by weight or less, 20 to 300 μm is 5 to 50% by weight, and 2 μm or less is 10 to 10% by weight.
The thermal spray material according to claim 1 or 2, wherein the remainder is 2 to 20 µm at 40% by weight.
、その添加量は０．３〜１０重量％であることを特徴とする講求項１ないし３のいずれか
に記載の溶射材料。 The crystallization accelerator is composed of one or more of a sodium salt, a potassium salt, and a lithium salt, and the addition amount is 0.3 to 10% by weight. Thermal spray material.
以下である炭素系粉末を１０重量％以下で、着火促進剤として添加することを特徴とする
溶射材料。 The thermal spray material according to any one of claims 1 to 4, having an ignition point of 200 ° C or higher and 800 ° C.
A thermal spray material characterized in that the following carbon-based powder is added at 10 wt% or less as an ignition accelerator.
シリカ粉末を５重量％以下で、粉体流動化促進剤として添加することを特徴とする溶射材
料。 6. The thermal spray material according to claim 1, wherein a silica powder having an average particle size of 0.2 μm or less is added to the thermal spray material according to claim 1 as a powder fluidization promoter at 5% by weight or less. .
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| JP2004155713A JP4493404B2 (en) | 2004-05-26 | 2004-05-26 | Thermal spray material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004155713A JP4493404B2 (en) | 2004-05-26 | 2004-05-26 | Thermal spray material |
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| Publication Number | Publication Date |
|---|---|
| JP2005336001A true JP2005336001A (en) | 2005-12-08 |
| JP4493404B2 JP4493404B2 (en) | 2010-06-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009120406A (en) * | 2007-11-12 | 2009-06-04 | Jfe Refractories Corp | Thermal spraying material |
| KR20160091414A (en) | 2014-01-29 | 2016-08-02 | 구로사키 하리마 코포레이션 | Thermal spraying material |
| JP2017145452A (en) * | 2016-02-17 | 2017-08-24 | 品川リフラクトリーズ株式会社 | Thermal spray material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7173650B1 (en) * | 2022-09-21 | 2022-11-16 | 日本特殊炉材株式会社 | Thermal spray powder |
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|---|---|---|---|---|
| JPS4946364B1 (en) * | 1969-11-04 | 1974-12-10 | ||
| JPS6158867A (en) * | 1984-08-24 | 1986-03-26 | 住友金属工業株式会社 | Flame spray material for furnace wall maintenance |
| JPH0940474A (en) * | 1995-07-27 | 1997-02-10 | Nippon Steel Corp | Flame thermal spraying material for repairing kiln and its production |
| JPH09132470A (en) * | 1995-11-10 | 1997-05-20 | Kawasaki Refract Co Ltd | Thermal spraying repairing material |
| JPH11279741A (en) * | 1998-03-27 | 1999-10-12 | Kawasaki Steel Corp | Powdery mixture for flame thermal spraying repair |
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2004
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4946364B1 (en) * | 1969-11-04 | 1974-12-10 | ||
| JPS6158867A (en) * | 1984-08-24 | 1986-03-26 | 住友金属工業株式会社 | Flame spray material for furnace wall maintenance |
| JPH0940474A (en) * | 1995-07-27 | 1997-02-10 | Nippon Steel Corp | Flame thermal spraying material for repairing kiln and its production |
| JPH09132470A (en) * | 1995-11-10 | 1997-05-20 | Kawasaki Refract Co Ltd | Thermal spraying repairing material |
| JPH11279741A (en) * | 1998-03-27 | 1999-10-12 | Kawasaki Steel Corp | Powdery mixture for flame thermal spraying repair |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009120406A (en) * | 2007-11-12 | 2009-06-04 | Jfe Refractories Corp | Thermal spraying material |
| KR20160091414A (en) | 2014-01-29 | 2016-08-02 | 구로사키 하리마 코포레이션 | Thermal spraying material |
| CN105940136A (en) * | 2014-01-29 | 2016-09-14 | 黑崎播磨株式会社 | Thermal spraying material |
| US9718734B2 (en) | 2014-01-29 | 2017-08-01 | Krosakiharima Corporation | Thermal spray material |
| JP2017145452A (en) * | 2016-02-17 | 2017-08-24 | 品川リフラクトリーズ株式会社 | Thermal spray material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4493404B2 (en) | 2010-06-30 |
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