JPH01264976A - Flame spraying material - Google Patents
Flame spraying materialInfo
- Publication number
- JPH01264976A JPH01264976A JP63091100A JP9110088A JPH01264976A JP H01264976 A JPH01264976 A JP H01264976A JP 63091100 A JP63091100 A JP 63091100A JP 9110088 A JP9110088 A JP 9110088A JP H01264976 A JPH01264976 A JP H01264976A
- Authority
- JP
- Japan
- Prior art keywords
- clinker
- spinel
- calcined alumina
- magnesia
- alumina
- 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
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000010285 flame spraying Methods 0.000 title claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 42
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 23
- 239000011029 spinel Substances 0.000 claims abstract description 23
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000004901 spalling Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 2
- 229910003112 MgO-Al2O3 Inorganic materials 0.000 abstract 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001679 gibbsite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000007751 thermal spraying Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000005187 foaming Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- UAMZXLIURMNTHD-UHFFFAOYSA-N dialuminum;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mg+2].[Al+3].[Al+3] UAMZXLIURMNTHD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、工業窯炉の内張り補修に使用する火炎溶射材
に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flame spray material used for repairing the lining of industrial kilns.
（従来の技術）
転炉、真空脱ガス炉、取鍋、タンプッシュなどの工業窯
炉の内張りを補修し、炉寿命を延長することが行なわれ
ている。その補修方法の一つとして近年開発された火炎
溶射法は、耐火粉末を火炎で溶融しつつ吹付けるもので
、泥しよう状の耐火物を吹き付ける従来方法に比べて、
補修層組織の緻密性、強度が格段に優れている。(Prior Art) The linings of industrial furnaces such as converters, vacuum degassing furnaces, ladles, and tumble pushers are repaired to extend the life of the furnace. The flame spraying method, which has been developed in recent years as one of the repair methods, sprays refractory powder while melting it with flame.
The repair layer structure has excellent density and strength.
この火炎溶射法に使用する溶射材として、マグネシア買
溶射材（例えば特公昭５９−６２４９号公報）アルミナ
買溶射材などが知られている。As thermal spraying materials used in this flame spraying method, magnesia thermal spraying materials (for example, Japanese Patent Publication No. 59-6249) and alumina thermal spraying materials are known.
（発明が解決しようとする課題）
しかし、マグネシア質は耐蝕性に優れるが、耐スポーリ
ング性に劣り、アルミナ質は逆に耐スポーリング性に優
れるが耐蝕性に劣る。これら従来の材質には、一長一短
があり、十分な補修効果が得られなかった。(Problems to be Solved by the Invention) However, magnesia has excellent corrosion resistance but poor spalling resistance, and alumina has excellent spalling resistance but poor corrosion resistance. These conventional materials have advantages and disadvantages, and sufficient repair effects have not been achieved.
本発明は、上記欠点のない耐蝕性、耐久ポーリング性を
兼ね備えた火炎溶射材を提供することを目的とする。An object of the present invention is to provide a flame spraying material that does not have the above-mentioned drawbacks and has both corrosion resistance and durable poling property.
（課題を解決するための手段）
本発明者らはまず、アルミナとマグネシアとの組み合せ
を考えた。しかし、こうして得られるアルミナ−マグネ
シア質溶射材は、耐スポーリング性には問題ないが、溶
射体組織のぜい弱化で耐蝕性に劣る。これは、アルミナ
とマグネシアとが反応してスピネルを生成し、そのスピ
ネル生成の際の容積膨張が原因と思われる。(Means for Solving the Problems) The present inventors first considered a combination of alumina and magnesia. However, the alumina-magnesia sprayed material thus obtained has no problem in spalling resistance, but is inferior in corrosion resistance due to the weakened structure of the sprayed material. This is thought to be due to the reaction between alumina and magnesia to produce spinel, and the volume expansion during spinel production.
そこで本発明者らはさらに検討を重ねた結果、軽焼アル
ミナとスピネルクリンカ−とを特定の割合で組み合せた
材質が良好な結果を示すことを知り、本発明を完成する
に至ったものである。As a result of further studies, the inventors of the present invention found that a material that combines light calcined alumina and spinel clinker in a specific ratio showed good results, and thus completed the present invention. .
すなわち、本発明の第１発明は、軽焼アルミナ２５〜９
５ｗｔ％、ＭｇＯ−Ａ交２０．系スピネルクリンカー５
〜７５ｗｔ％よりなることを特徴とした火炎溶射材であ
る。That is, the first invention of the present invention provides light calcined alumina 25 to 9
5wt%, MgO-A 20. Spinel clinker 5
It is a flame spraying material characterized by comprising ~75 wt%.
ところで、上記第１発明の材質は、軽焼アルミナの使用
で溶融性が向上するので、火炎中への溶射材投入の速度
が遅い場合には、溶融過度になって、溶射体表面部が発
泡現象でその表面は多孔質化する。By the way, the meltability of the material of the first invention is improved by using lightly calcined alumina, so if the rate of injection of the spraying material into the flame is slow, excessive melting will occur and the surface of the sprayed body will foam. This phenomenon causes the surface to become porous.
第２発明は、第１発明の効果に加え、発泡現象を押えた
もので、軽焼アルミナ２５〜９５ｗｔ％、ＭｇＯ−Ａｌ
２Ｏ３系スピネルクリンカ−５〜７５ｗｔ％、マグネシ
アクリンカ−３０ｗｔ％以下よりなることを特徴とした
火炎溶射材である。In addition to the effects of the first invention, the second invention suppresses the foaming phenomenon.
This is a flame spraying material characterized by comprising 5 to 75 wt% of 2O3 spinel clinker and 30 wt% or less of magnesia clinker.
以下、本発明をさらに詳しく説明する。The present invention will be explained in more detail below.
本発明で使用する軽焼アルミナ（仮焼アルミナと称され
ることもある。）は、多孔質で火炎熱流が浸透しやすい
ためか溶射材の溶融性に寄与する。Lightly calcined alumina (sometimes referred to as calcined alumina) used in the present invention contributes to the meltability of the thermal spray material, probably because it is porous and easily penetrated by flame heat flow.
その製造方法は、周知のとおり、バイヤー法による水酸
化アルミニウムを１０００〜１５００℃程度で焼成して
得る。この軽焼アルミナに適当なバインダーを加えて２
０００℃程度で焼成される焼成アルミナ、あるいは軽焼
アルミナを電気炉で溶融して製造される電融アルミナな
どとは、同じアルミナであっても製造法、組織などの相
違から明確に区別される。As is well known, the manufacturing method is to sinter aluminum hydroxide at about 1,000 to 1,500° C. using the Bayer process. Add a suitable binder to this lightly calcined alumina and
Even though they are the same alumina, they are clearly distinguished from calcined alumina, which is fired at around 000℃, or fused alumina, which is manufactured by melting light calcined alumina in an electric furnace, due to differences in manufacturing method, structure, etc. .
ＭｇＯ−Ａｌ２Ｏ５系スピネルクリンカ−（以下スピネ
ルクリンカ−）の使用は、塩基性耐火材がもつ耐蝕性に
加え、前記軽焼アルミナとの組み合せにおいて膨張がな
いため、緻密かつ強度に優れた溶射体組織が得られる。The use of MgO-Al2O5-based spinel clinker (hereinafter referred to as spinel clinker) has the advantage of not only the corrosion resistance of basic refractory materials, but also the fact that it does not expand when combined with the above-mentioned lightly calcined alumina, resulting in a dense and strong thermal spray structure. is obtained.
このスピネルクリンカ−は電融量、あるいは１６５０℃
程度以上で焼成される焼結晶とする。又化学成分値とし
ては、特に限定するものではないが、例えばり
Ａ又、０．７０〜７５％、ＭｇＯ２５〜３０％ｗｔ％で
ある。This spinel linker has an electric melting rate or 1650℃
It is a fired crystal that is fired at a temperature higher than 100%. Further, the chemical component values are not particularly limited, but are, for example, A, 0.70 to 75%, and MgO 25 to 30% wt%.
軽焼アルミナ、スピネルクリンカ−の割合は含量で１０
０重量％において、軽焼アルミナが２５ｗｔ％未満でス
ピネルクリンカーが７５冑ｔ％を越えると、溶融性に劣
り、付着率、溶射体組織の緻密性などが不十分となる。The content of light calcined alumina and spinel clinker is 10
At 0% by weight, if the amount of lightly calcined alumina is less than 25% by weight and the amount of spinel clinker exceeds 75% by weight, the meltability will be poor, and the adhesion rate and density of the thermal spray structure will be insufficient.
また耐スポーリング性も劣る。一方軽焼アルミナが９５
ｗｔ％を越え、スピネルクリンカ−が５ｗｔ％未満では
耐蝕性に劣る。さらに好ましい範囲は、軽焼アルミナ４
０〜９０冑ｔ％、スピネルクリンカ−１θ〜［１０ｗｔ
％である。It also has poor spalling resistance. On the other hand, light calcined alumina is 95
If the spinel linker content exceeds 5 wt%, the corrosion resistance will be poor. A more preferable range is light calcined alumina 4
0~90t%, spinel clinker-1θ~[10wt
%.
第２発明で使用するマグネシアクリンカ−は、溶射体表
面に見られる発泡現象を防止する役割をもつ。The magnesia clinker used in the second invention has the role of preventing the foaming phenomenon observed on the surface of the sprayed body.
天然マグネシアクリンカ−１海水マグネシアタリンカ−
１電融マグネシアクリンカ−のいずれでもよい。軽焼ア
ルミナ、スピネルクリンカ−、マグネシアクリンカ−の
合量が１００重１％において、このマグネシアクリンカ
−の割合は３０ｗｔ％以下である。軽焼アルミナのｈ１
２０ｓ成分と反応してＭｇＯ−Ａ４ｚＯ３系スピネルを
生成するためか、その添加量が３０ｗｔ％を越えると溶
射体組織に膨張が見られる。最も効果的な割合は、３〜
２０ｗｔ％である。Natural magnesia clinker-1 Seawater magnesia clinker
1. Any of 1 electrofused magnesia clinker may be used. When the total amount of light calcined alumina, spinel clinker, and magnesia clinker is 100% by weight, the proportion of magnesia clinker is 30% by weight or less. Lightly calcined alumina h1
If the amount added exceeds 30 wt%, expansion is observed in the structure of the sprayed body, probably because it reacts with the 20s component to produce MgO-A4zO3 spinel. The most effective ratio is 3-
It is 20wt%.
以上の軽焼アルミナ、スピネルクリンカ−、マグネシア
クリンカ−の粒度は特に限定されるものではなく、火炎
溶射材として好適な例えば粒径１ｍｍ以下、平均粒径５
０〜５００μｍとする。また粒子径は球形、非球形を問
わない。The particle size of the above-mentioned lightly calcined alumina, spinel clinker, and magnesia clinker is not particularly limited.
0 to 500 μm. Moreover, the particle size does not matter whether it is spherical or non-spherical.
本発明は以上の各配合物以外にも、本発明の効果を阻害
しない範囲で、火炎溶射材の配合物としての公知である
例えばコークス粉、各種金属粉、スラグ粉、又本発明で
必須要件とした以外の耐火物粉などを適量添加してもよ
い。In addition to the above-mentioned formulations, the present invention also includes compounds that are known as formulations for flame spraying materials, such as coke powder, various metal powders, and slag powder, as long as they do not impede the effects of the present invention. An appropriate amount of refractory powder other than the above may be added.
溶射補修においては、常法どおり、プロバンー０２、ア
セチレン−０２、灯油−〇２などから発生させた高温火
炎中に、溶射材を一定速度で没入する。In thermal spray repair, the thermal spray material is immersed at a constant speed into a high-temperature flame generated from Provan-02, acetylene-02, kerosene-02, etc., as usual.
溶射材は高温火炎で溶融または半溶融状態となり、被補
修面に付着し、炉の耐火物内張りが補修される。The thermal spray material becomes molten or semi-molten in the high-temperature flame and adheres to the surface to be repaired, repairing the refractory lining of the furnace.
（作用・効果）
本発明によれば、耐蝕性、耐久ポーリング性を兼ね備え
た火炎溶射材を得ることができる。(Function/Effect) According to the present invention, a flame sprayed material having both corrosion resistance and durable poling property can be obtained.
後述する比較例に示すように、アルミナ買は耐蝕性に劣
り、マグネシア質は耐久ポーリング性に劣る。また、こ
の両材質を組み合せたアルミナ−マグネシア質は溶射体
の膨張が原因で組織、強度が十分でなく、結局は耐蝕性
に劣る。As shown in the comparative examples described later, alumina materials have poor corrosion resistance, and magnesia materials have poor durable poling properties. Furthermore, the alumina-magnesia material, which is a combination of these two materials, does not have sufficient structure and strength due to the expansion of the thermally sprayed material, and is ultimately inferior in corrosion resistance.
これに対して、本発明の実施例では、溶射体の膨張が見
られず、耐蝕性、耐久ポーリング性の効果がいかんなく
発揮され、この溶射材を使用したことによる補修の効果
はきわめて大きい。On the other hand, in the examples of the present invention, no expansion of the thermal sprayed material was observed, and the effects of corrosion resistance and durable poling property were fully exhibited, and the repair effect of using this thermal spraying material was extremely large.
本発明が良好な結果を示すには、つぎの理由からと想像
される。すなわち、例えばアルミナにマグネシアを組み
合せたものでは、溶射による高温下でスピネル（ＭｇＯ
−ＡＬＯ３）が生成し、それが原因で溶射体は体積膨張
をきたし、組織強度が低下するが、本発明のように最初
からスピネルクリンカ−の組み合せでは使用中にスピネ
ルの生成がないので体積膨張の問題もない。The reason why the present invention shows good results is considered to be due to the following reasons. For example, in the case of a combination of alumina and magnesia, spinel (MgO
-ALO3) is generated, which causes volumetric expansion of the thermal sprayed body and a decrease in tissue strength. However, with the combination of spinel clinker from the beginning as in the present invention, no spinel is generated during use, so volumetric expansion occurs. No problem.
一方、第２発明でマグネシアクリンカ−の添加は、溶射
体表面の発泡を防止する効果もつ。On the other hand, in the second invention, the addition of magnesia clinker has the effect of preventing foaming on the surface of the sprayed body.
これはマグネシアクリンカ−が溶射材の他の成分である
軽焼アルミナ、スピネルクリンカ−に比べて融点が高く
、溶射中に完全に溶融されずに溶射材中に存在すること
で、発泡を押えるためと思われる。This is because magnesia clinker has a higher melting point than the other components of the thermal spraying material, such as lightly calcined alumina and spinel clinker, and it remains in the thermal spraying material without being completely melted during thermal spraying, suppressing foaming. I think that the.
したがって、本発明の溶射材を使用した火炎溶射補修に
よれば炉寿命が格段に向上し、材料費の節約、炉稼動率
の向上、補修工数の低減など、その効果はきわめて大き
いものがある。Therefore, by flame spray repair using the thermal spray material of the present invention, the life of the furnace is significantly improved, and the effects are extremely large, such as saving material costs, improving furnace operation rate, and reducing repair man-hours.
（実施例）
本発明実施例とその比較例を示す。第１表は各個で使用
した配合物の化学成分とその粒度、第２表は各個の配合
組成物と試験結果である。(Example) Examples of the present invention and comparative examples thereof will be shown. Table 1 shows the chemical components and particle sizes of each formulation used, and Table 2 shows each formulation and test results.
Claims (1)
Ｏ＿３系スピネルクリンカー５〜７５ｗｔ％よりなるこ
とを特徴とした火炎溶射材。 ２ 軽焼アルミナ２５〜９５ｗｔ％、ＭｇＯ−Ａｌ＿２
Ｏ＿３スピネルクリンカー５〜７５ｗｔ％、マグネシア
クリンカー３０ｗｔ％以下よりなることを特徴とした火
炎溶射材。[Claims] 1 Lightly calcined alumina 25 to 95 wt%, MgO-Al_2
A flame spray material characterized by comprising 5 to 75 wt% of O_3-based spinel clinker. 2 Lightly calcined alumina 25-95wt%, MgO-Al_2
A flame spraying material comprising 5 to 75 wt% of O_3 spinel clinker and 30 wt% or less of magnesia clinker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63091100A JPH01264976A (en) | 1988-04-13 | 1988-04-13 | Flame spraying material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63091100A JPH01264976A (en) | 1988-04-13 | 1988-04-13 | Flame spraying material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01264976A true JPH01264976A (en) | 1989-10-23 |
| JPH0437030B2 JPH0437030B2 (en) | 1992-06-18 |
Family
ID=14017100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63091100A Granted JPH01264976A (en) | 1988-04-13 | 1988-04-13 | Flame spraying material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01264976A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05163561A (en) * | 1991-12-10 | 1993-06-29 | Kurosaki Refract Co Ltd | Thermal spraying member containing metal powder |
| JPH06629A (en) * | 1991-02-20 | 1994-01-11 | Nippon Steel Corp | Hollow fire resistant material for molten metal vessel with induction heating device |
-
1988
- 1988-04-13 JP JP63091100A patent/JPH01264976A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06629A (en) * | 1991-02-20 | 1994-01-11 | Nippon Steel Corp | Hollow fire resistant material for molten metal vessel with induction heating device |
| JPH05163561A (en) * | 1991-12-10 | 1993-06-29 | Kurosaki Refract Co Ltd | Thermal spraying member containing metal powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0437030B2 (en) | 1992-06-18 |
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