JP2549031B2 - Fireproof powder for thermal spraying - Google Patents
Fireproof powder for thermal sprayingInfo
- Publication number
- JP2549031B2 JP2549031B2 JP3144297A JP14429791A JP2549031B2 JP 2549031 B2 JP2549031 B2 JP 2549031B2 JP 3144297 A JP3144297 A JP 3144297A JP 14429791 A JP14429791 A JP 14429791A JP 2549031 B2 JP2549031 B2 JP 2549031B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- garnet
- adhesiveness
- refractory
- clinker
- 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.)
- Expired - Lifetime
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- Ceramic Products (AREA)
- Coating By Spraying Or Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は転炉その他の窯炉の炉
壁補修材等として使用するのに適した溶射用耐火粉末に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant powder for thermal spraying suitable for use as a furnace wall repair material for converters and other kilns.
【０００２】[0002]
【従来の技術】特公昭６０−５３２７３号公報には、Ｍ
ｇＯを主成分とする粉末状の耐火材をフラックスと共に
火炎により溶射して炉壁に溶射層を形成する窯炉の火炎
溶射補修方法が開示されている。2. Description of the Related Art Japanese Patent Publication No. 60-53273 discloses an M
Disclosed is a flame spray repair method for a kiln in which a powdery refractory material containing gO as a main component is sprayed with a flux by a flame to form a sprayed layer on the furnace wall.
【０００３】特公昭６３−５３１５３号公報には、アル
ミニウム化合物とマグネシウム化合物を適当に調合して
１０００〜１６５０℃で焼成した後に平均粒径３０〜１
００μｍに粉砕するスピネル質溶射材が開示されてい
る。In Japanese Examined Patent Publication No. 63-53153, an aluminum compound and a magnesium compound are appropriately mixed and fired at 1000 to 1650 ° C., and thereafter, an average particle size is 30 to 1
A spinel thermal spray material pulverized to 00 μm is disclosed.
【０００４】特公昭６１−１０４１８号公報には、平均
粒径１０μ以下の耐火材料からなる一次粒子を有機質バ
インダによって結合した平均粒径３０〜５００μｍの二
次粒子を構成した組織からなる溶射材料が開示されてい
る。Japanese Patent Publication No. 61-10418 discloses a thermal spray material having a structure in which primary particles made of a refractory material having an average particle size of 10 μm or less are combined with an organic binder to form secondary particles having an average particle size of 30 to 500 μm. It is disclosed.
【０００５】また、特開昭６１−１８６２５８号公報に
は、粒径２００〜１０μｍに調整された高融点耐火材料
粉末の粒子表面を平均粒径１０−０．１μｍの易焼結性
酸化物超微粉末で被覆した火炎溶射用耐火粉末が開示さ
れている。Further, in Japanese Patent Laid-Open No. 61-186258, there is disclosed a high melting point refractory material powder having a particle size of 200 to 10 μm, the surface of which has a mean particle size of 10 to 0.1 μm. A flame spray refractory powder coated with a fine powder is disclosed.
【０００６】さらに、特開昭６１−１１８１３１号公報
には、無機組成粉末を燃焼域で溶融して溶融粒子とし、
それらを冷却域で急速に冷却し、融着を防止して独立の
球状粒子にする粒子製造用燃焼炉装置が示されている。Further, in Japanese Patent Laid-Open No. 61-118131, a powder of an inorganic composition is melted in a combustion region to form a molten particle,
A combustion furnace apparatus for particle production is shown which cools them rapidly in a cooling zone to prevent fusing and form independent spherical particles.
【０００７】従来、窯炉用の炉壁補修材として使用され
る耐火粉末は、アルミナ、クロム、マグネシア等を主成
分にして溶融性を高め、作業性や接着性を改善するため
に耐火材料を加熱処理して造粒化し、比表面積を拡大し
たり、転炉スラグや鉄粉を添加したり、あるいは耐火材
料表面への低融物の被覆等の処理を施してきた。Conventionally, the refractory powder used as a furnace wall repair material for a kiln has alumina, chromium, magnesia, etc. as its main components to enhance the meltability and to improve workability and adhesiveness. It has been heat-treated and granulated to increase the specific surface area, add converter slag or iron powder, or coat the refractory material with a low-melting material.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、従来の
造粒化や耐火材料表面への被覆等の処理は、溶射材料の
製造コストの増加を招く欠点がある。However, the conventional treatments such as granulation and coating on the surface of the refractory material have the drawback of increasing the manufacturing cost of the thermal spray material.
【０００９】そこで、本発明は、容易かつ安価に製造で
き、しかも耐食性に優れた溶射用耐火粉末を提供するこ
とを目的としている。Therefore, an object of the present invention is to provide a refractory powder for thermal spraying which can be manufactured easily and inexpensively and which is excellent in corrosion resistance.
【００１０】[0010]
【課題を解決するための手段】本発明は、焼結マグネシ
アクリンカー、電融マグネシアクリンカー、焼結スピネ
ル、ドロマイトクリンカー、ライムクリンカーおよびア
ルミナの１種又はそれらの組合わせ６０〜９８重量％か
らなる耐火原料に、ガーネット１〜４０重量％を混合し
たことを特徴とする溶射用耐火粉末を要旨としている。SUMMARY OF THE INVENTION The present invention provides a refractory material comprising one of sintered magnesia clinker, electrofused magnesia clinker, sintered spinel, dolomite clinker, lime clinker and alumina or a combination thereof in an amount of 60 to 98% by weight. The gist is a refractory powder for thermal spraying, which is characterized in that 1 to 40% by weight of garnet is mixed with a raw material.
【００１１】ガーネットの粒度範囲は好ましくは５００
〜２５μｍに調整する。The particle size range of garnet is preferably 500.
Adjust to ~ 25 μm.
【００１２】[0012]
【作用】本発明においては、焼結マグネシアクリンカ
ー、電融マグネシアクリンカー、焼結スピネル、ドロマ
イトクリンカー、ライムクリンカー、及びアルミナの１
種又はそれらの組合せを耐火原料として使用し、しか
も、ガーネットを混合しているので、後述するガーネッ
トの特異な熱膨張曲線がそのような耐火原料に相乗的に
作用して、溶射用耐火粉末として良好な結果をもたら
す。In the present invention, one of sintered magnesia clinker, electrofused magnesia clinker, sintered spinel, dolomite clinker, lime clinker, and alumina is used.
Since a seed or a combination thereof is used as a refractory raw material, and further, garnet is mixed, the peculiar thermal expansion curve of garnet described later acts synergistically on such a refractory raw material to obtain a thermal spray refractory powder. Gives good results.
【００１３】本発明は、ガーネットの熱的特性を巧みに
利用したものであり、炉壁煉瓦への接着性や溶融層の緻
密化を向上させるものである。耐火原料にガーネットを
混合した溶射材料は、火炎中を通過するときに火炎によ
りガーネットの異常膨脹が始まり、比表面積が拡大し、
溶融性に富む状態となる。その結果、比表面積が小さく
溶着性に欠ける炉壁に耐火原料を容易に付着させること
が可能となる。すなわち、造粒化等の前処理によって比
表面積を拡大したものを溶射するのではなく、異常膨脹
で全面に広がったガーネットの溶融面に耐火原料を溶着
させて付着性を向上させるのである。The present invention makes good use of the thermal characteristics of garnet, and improves the adhesiveness to furnace wall bricks and the densification of the molten layer. Thermal spray material, which is a mixture of garnet and refractory raw materials, begins abnormal expansion of the garnet due to the flame when passing through the flame, expanding the specific surface area,
It becomes in a state of being highly meltable. As a result, it becomes possible to easily attach the refractory raw material to the furnace wall having a small specific surface area and a poor weldability. That is, instead of spraying a material having an increased specific surface area by pretreatment such as granulation, the refractory raw material is welded to the molten surface of the garnet which is spread over the entire surface due to abnormal expansion to improve the adhesion.
【００１４】[0014]
【実施例】本発明は、耐火原料として焼結マグネシアク
リンカー、電融マグネシアクリンカー、焼結スピネル、
ドロマイトクリンカー、ライムクリンカーおよびアルミ
ナの１種又はそれらの組合わせを使用し、天然に産する
ガーネットを混合したことを特徴とする溶射用耐火粉末
である。EXAMPLE The present invention is a sintered magnesia clinker, a fused magnesia clinker, a sintered spinel as a refractory raw material,
A refractory powder for thermal spraying characterized by using naturally-occurring garnet mixed with one or a combination of dolomite clinker, lime clinker and alumina.
【００１５】耐火原料は粒径を３００〜２５μｍにする
のが好ましい。その理由は、３００μｍを超えると、粒
子表面が溶融性に欠けがちになり、接着性や緻密な溶着
層の形成が比較的困難となり、耐食性が低下するからで
ある。逆に粒径が２５μｍ未満であると、溶射バーナ部
への詰まりや飛散が激しくなりすぎて、補修箇所への適
切な溶射の設定が困難となり、溶着層の形成が困難とな
り、流動性に劣るためにノズルからの噴出が脈動して溶
射体の密度が層の厚さ方向に不均一となることが多くな
るからである。The refractory raw material preferably has a particle size of 300 to 25 μm. The reason is that if it exceeds 300 μm, the particle surface tends to lack meltability, it becomes relatively difficult to form an adhesive property or a dense welding layer, and corrosion resistance deteriorates. On the other hand, if the particle size is less than 25 μm, clogging or scattering to the spray burner part becomes too vigorous, it becomes difficult to set appropriate spraying to the repaired part, it becomes difficult to form a weld layer, and fluidity deteriorates. Therefore, the ejection from the nozzle pulsates and the density of the thermal spraying material often becomes non-uniform in the thickness direction of the layer.
【００１６】耐火原料の添加量は６０〜９８重量％に限
定する。その理由は、耐火原料が６０重量％未満になる
と、耐食性が低下して所望の耐用条件が得られず、逆に
９８重量％を越えると、溶着体の焼結性や炉壁煉瓦への
接着性を損ねる結果になりがちであるためである。The amount of refractory material added is limited to 60 to 98% by weight. The reason is that when the refractory raw material is less than 60% by weight, the corrosion resistance is deteriorated and the desired service condition cannot be obtained. On the contrary, when it exceeds 98% by weight, the weldability and the adhesion to the furnace wall brick are increased. This is because it tends to result in loss of sex.
【００１７】耐火原料は窯炉条件や操業条件の変化に応
じて１種を使用したり、２種以上を組み合わせたりして
使用するのが望ましい。As the refractory raw material, it is desirable to use one kind or a combination of two or more kinds according to changes in kiln furnace conditions and operating conditions.
【００１８】また、市販原料も耐火原料として添加可能
である。Commercially available raw materials can also be added as refractory raw materials.
【００１９】ガーネットは、半導体基板、ブラウン管、
光学レンズ、プリズム、板硝子等の研磨に広く使用され
ているものが最適である。このようなガーネットは、炉
壁耐火物への高い接着強度の付与と緻密な溶着層の形成
に大きな役割を果たす。Garnets are semiconductor substrates, cathode ray tubes,
The ones that are widely used for polishing optical lenses, prisms, plate glass, etc. are most suitable. Such garnet plays a major role in imparting high adhesive strength to the furnace wall refractory and forming a dense weld layer.
【００２０】また、ガーネットは金剛砂や柘榴石と一般
に呼ばれており、新モース硬度１０の比較的硬度の高い
天然原料である。ガーネットの組成はアルミナ質ガーネ
ットとライム質ガーネットに大別されるが、本発明にお
いては両方のガーネットが使用可能である。Garnet is generally called Kongo sand or garnet and is a natural raw material having a new Mohs hardness of 10 and a relatively high hardness. The composition of garnet is roughly classified into alumina garnet and lime garnet, but both garnets can be used in the present invention.
【００２１】ガーネットの粒径は５００〜２５μｍに調
整するのが最適である。５００μｍを超える粒径のガー
ネットを添加すると、高速火炎中を溶射粉末が通過する
時間が極めて短時間であるため、火炎中で瞬時に溶融し
がたく、そのため、接着性が低下したり、得られる接着
層が強度や耐食性を欠く場合がありうる。逆に粒径が２
５μｍ未満であると、耐火原料のところでも説明したよ
うに、良好な作業条件や溶着層の形成が困難になりがち
である。The particle size of garnet is optimally adjusted to 500 to 25 μm. When a garnet having a particle size of more than 500 μm is added, the sprayed powder passes through the high-speed flame for an extremely short time, so it is difficult to melt instantly in the flame, resulting in a decrease in adhesiveness The adhesive layer may lack strength and corrosion resistance. Conversely, the particle size is 2
If it is less than 5 μm, as described in the refractory raw material, good working conditions and formation of a weld layer tend to be difficult.
【００２２】ガーネットの熱特性は、たとえばアルミナ
質柘榴石の場合、１０５０℃で直線的な可逆的膨脹を示
し、１０５０℃を超えると直立に近い異常膨脹を呈し、
１１２０℃で膨脹が停止すると、反転して急収縮に移
る。他方、石灰質柘榴石の場合は、９００〜９５０℃で
第一段の熱膨脹を示し、それが終憶すると、１１５０℃
から第二段の異常膨脹を起こし、１１８０℃付近で反転
して収縮に移り、溶融が始まる。The thermal characteristics of garnet, for example, in the case of aluminous garnet, show a linear reversible expansion at 1050 ° C., and when it exceeds 1050 ° C., an abnormal expansion close to upright is exhibited.
When the expansion stops at 1120 ° C, it reverses and suddenly contracts. On the other hand, calcareous garnet shows a first-stage thermal expansion at 900 to 950 ℃, and when it ends, it is 1150 ℃.
Then, abnormal expansion of the second stage occurs, and it inverts at around 1180 ° C. and shifts to contraction, and melting starts.
【００２３】このように、ガーネットは比較的低温で分
解及び溶融を起こし、冷却しても元のガーネットを再生
しないという熱特性を有する。As described above, garnet has a thermal characteristic that it decomposes and melts at a relatively low temperature and does not regenerate the original garnet even when cooled.
【００２４】ガーネットの添加量は接着性や耐食性を緩
和して最適に決める。添加量が１重量％未満であると、
接着性や耐食性が低下し、良好な溶着層の形成が困難に
なりがちである。逆にガーネットの添加量が４０重量％
を超えると、付着性は良好であるが、接着性や耐食性が
劣ることが多くなり、補修材の量を増加させる必要が生
じ、原単位の悪化を招く。したがって、ガーネットの添
加量は１〜４０重量％の範囲が好ましいのである。その
中でもガーネットの最適の添加量は付着性及び耐食性の
観点から５〜２５重量％である。The amount of garnet added is optimally determined by relaxing adhesiveness and corrosion resistance. If the added amount is less than 1% by weight,
Adhesiveness and corrosion resistance are reduced, and it tends to be difficult to form a good welding layer. Conversely, the amount of garnet added is 40% by weight
If it exceeds, the adhesiveness is good, but the adhesiveness and the corrosion resistance are often inferior, and it becomes necessary to increase the amount of the repair material, resulting in deterioration of the basic unit. Therefore, the amount of garnet added is preferably in the range of 1 to 40% by weight. Among them, the optimum addition amount of garnet is 5 to 25% by weight from the viewpoint of adhesion and corrosion resistance.
【００２５】ただし、本発明は前述のような耐火原料お
よびガーネットの添加量に限定されるものではない。１
重量％以下の不純物を含むこともある。However, the present invention is not limited to the addition amounts of the refractory raw material and garnet as described above. 1
It may contain impurities by weight or less.
【００２６】本発明をさらに具体的に示すために実施例
１〜７と比較例１〜３を説明する。実施例１〜７および
比較例１〜３の原料組成および試験結果は、表１に示す
とおりである。Examples 1 to 7 and Comparative Examples 1 to 3 will be described to more specifically show the present invention. The raw material compositions and test results of Examples 1 to 7 and Comparative Examples 1 to 3 are as shown in Table 1.
【００２７】表１において、付着性とは、付着しなかっ
た材料を差し引いたものの割合である。接着性とは、接
着層と煉瓦（ＭｇＯ−Ｃｒ２Ｏ３）とのせん断力を測定
したものである。耐食性とは、溶着層を回転侵食機にか
けて試験を行い、その侵食寸法を示したものである。In Table 1, "adhesiveness" is the ratio of the material that has not adhered to it, subtracted. And the adhesive is a measure of the shear force between the adhesive layer and the bricks (MgO-Cr 2 O 3) . The term "corrosion resistance" refers to the erosion dimension of a welded layer that has been tested by a rotary erosion machine.
【００２８】[0028]
【実施例１】原料は、マグネシアクリンカーと、ドロマ
イトクリンカーと、アルミナ質ガーネットからなり、耐
火原料として添加するマグネシアクリンカーは６８重量
％であり、ドロマイトクリンカーは３０重量％である。
ガーネットは２重量％である。これらの原料を混合して
溶射材料を得た。この溶射材について付着性、接着性及
び耐食性を試験した。Example 1 The raw material consisted of magnesia clinker, dolomite clinker and aluminous garnet. Magnesia clinker added as a refractory raw material was 68% by weight and dolomite clinker was 30% by weight.
Garnet is 2% by weight. These raw materials were mixed to obtain a thermal spray material. The thermal spray material was tested for adhesion, adhesion and corrosion resistance.
【００２９】実施例１の付着性は６０重量％で、接着性
は４．０ｋｇｆ／ｃｍ２で、侵食量は１０ｍｍであっ
た。The adhesiveness of Example 1 was 60% by weight, the adhesiveness was 4.0 kgf / cm 2 , and the erosion amount was 10 mm.
【００３０】[0030]
【実施例２】耐火原料としてのマグネシアクリンカー４
５重量％とドロマイトクリンカー５０重量％にアルミナ
質ガーネットを５重量％添加し、それらを混合して溶射
材を得た。その溶射材の試験を行ったところ、付着性は
７０重量％で、接着性は５．３ｋｇｆ／ｃｍ２で、侵食
量は１２ｍｍであった。[Example 2] Magnesia clinker 4 as a refractory raw material
5% by weight of alumina garnet was added to 5% by weight and 50% by weight of dolomite clinker, and they were mixed to obtain a thermal spray material. When the sprayed material was tested, the adhesion was 70% by weight, the adhesion was 5.3 kgf / cm 2 , and the erosion amount was 12 mm.
【００３１】[0031]
【実施例３】耐火原料としてのマグネシアクリンカー４
０重量％およびドロマイトクリンカー５０重量％にアル
ミナ質ガーネットを１０重量％添加し、それらを混合し
て溶射材を得た。その溶射材の試験結果は、付着性が８
０重量％で、接着性が８．８ｋｇｆ／ｃｍ２で、侵食量
は１２ｍｍであった。[Example 3] Magnesia clinker 4 as a refractory raw material
10% by weight of alumina garnet was added to 0% by weight and 50% by weight of dolomite clinker, and they were mixed to obtain a thermal spray material. The test result of the thermal spray material shows that the adhesiveness is 8
At 0% by weight, the adhesiveness was 8.8 kgf / cm 2 and the erosion amount was 12 mm.
【００３２】[0032]
【実施例４】耐火原料としてのマグネシアクリンカー６
０重量％およびドマイトクリンカー１５重量％にアルミ
ナ粉末５重量％を添加し、さらにアルミナ質ガーネット
を２０重量％添加して、溶射材を得た。その試験結果
は、付着性が８０重量％で、接着性が７．５ｋｇｆ／ｃ
ｍ２で、侵食量が１５ｍｍであった。[Example 4] Magnesia clinker 6 as a refractory raw material
5% by weight of alumina powder was added to 0% by weight and 15% by weight of domitoclinker, and further 20% by weight of alumina garnet was added to obtain a thermal spray material. The test results show that the adhesion is 80% by weight and the adhesion is 7.5 kgf / c.
The erosion amount was 15 mm at m 2 .
【００３３】[0033]
【実施例５】耐火原料としてマグネシアクリンカー５０
重量％とアルミナ粒子１０重量％を混合し、さらにアル
ミナ質ガーネット４０重量％を添加して、それらを混合
して溶射材料を得た。この溶射材料の試験結果は、付着
性が８０重量％で、接着性が７．５ｋｇｆ／ｃｍ２で、
侵食量は２２ｍｍであった。[Example 5] Magnesia clinker 50 as a refractory raw material
% By weight and 10% by weight of alumina particles were mixed, 40% by weight of alumina garnet was further added, and they were mixed to obtain a thermal spray material. The test result of this thermal spray material shows that the adhesiveness is 80% by weight, the adhesiveness is 7.5 kgf / cm 2 ,
The amount of erosion was 22 mm.
【００３４】[0034]
【実施例６】耐火原料としてのマグネシアクリンカー３
０重量％および焼結スピネル５５重量％に、アルミナ質
ガーネットを１５重量％添加して溶射材を得た。その溶
射材の試験結果は、付着性が７５重量％で、接着性が
６．２ｋｇｆ／ｃｍ２で、侵食量は２１ｍｍであった。[Example 6] Magnesia clinker 3 as a refractory raw material
15% by weight of alumina garnet was added to 0% by weight and 55% by weight of sintered spinel to obtain a thermal spray material. The test results of the thermal spray material showed that the adhesiveness was 75% by weight, the adhesiveness was 6.2 kgf / cm 2 , and the erosion amount was 21 mm.
【００３５】[0035]
【実施例７】耐火原料としてのライムクリンカー６０重
量％および電融マグネシアクリンカー３０重量％に、ラ
イム質ガーネットを１０重量％添加して溶射材を得た。
その溶射材の試験結果は、付着性が８０重量％で、接着
性が６．８ｋｇｆ／ｃｍ２で、侵食量は１２ｍｍであっ
た。Example 7 10% by weight of lime garnet was added to 60% by weight of lime clinker as a refractory raw material and 30% by weight of electrofused magnesia clinker to obtain a thermal spray material.
The test results of the thermal spray material showed that the adhesiveness was 80% by weight, the adhesiveness was 6.8 kgf / cm 2 , and the erosion amount was 12 mm.
【００３６】以上の実施例１〜７においては付着性、接
着性及び侵食量がすべて良好な結果であった。In the above Examples 1 to 7, the adhesion, the adhesiveness and the erosion amount were all good results.
【００３７】次に比較例１〜３について説明する。Next, Comparative Examples 1 to 3 will be described.
【００３８】[0038]
【比較例１】耐火原料としてマグネシアクリンカー７０
重量％およびアルミナ粒子３０重量％を混合して、溶射
材を得た。ガーネットの添加は全くなかった。このよう
な溶射材について試験を行ったところ、試験結果は、付
着性が３８重量％で、接着性が０．８ｋｇｆ／ｃｍ
２で、侵食量が３８ｍｍであった。つまり、付着性と接
着性が悪かった。[Comparative Example 1] Magnesia clinker 70 as a refractory raw material
% By weight and 30% by weight of alumina particles were mixed to obtain a thermal spray material. No garnet was added. When a test was performed on such a thermal spray material, the test results showed that the adhesiveness was 38% by weight and the adhesiveness was 0.8 kgf / cm.
2 , the erosion amount was 38 mm. That is, the adhesiveness and adhesiveness were poor.
【００３９】[0039]
【比較例２】耐火原料としてマグネシアクリンカー３０
重量％およびアルミナ粒子２０重量％を混合し、さらに
アルミナ質ガーネットを５０重量％添加したうえ、それ
らを混合して溶射材を得た。この溶射材の試験結果は、
付着性が８０重量％で、高い特性が得られた。しかし、
接着性は０．３ｋｇｆ／ｃｍ２であり、また、耐食量が
４５〜５０ｍｍであって、接着性と侵食量は本発明のい
ずれの実施例１〜７よりも著しく劣る試験結果であっ
た。[Comparative Example 2] Magnesia clinker 30 as a refractory raw material
% By weight and 20% by weight of alumina particles were mixed, 50% by weight of alumina garnet was further added, and they were mixed to obtain a thermal spray material. The test result of this thermal spray material is
Adhesiveness was 80% by weight, and high characteristics were obtained. But,
The adhesiveness was 0.3 kgf / cm 2 , the corrosion resistance was 45 to 50 mm, and the adhesiveness and the erosion amount were test results that were significantly inferior to any of Examples 1 to 7 of the present invention.
【００４０】[0040]
【比較例３】耐火原料としてマグネシアクリンカー２０
重量％とドロマイトクリンカー３５重量％を添加し、さ
らにアルミナ質ガーネットを４５重量％添加したうえ、
それらを混合して溶射材を得た。この溶射材の試験結果
は前述の比較例２と同様に付着性が優れていたが、接着
性と耐食性が本発明の実施例に比較して劣っていた。す
なわち、比較例３の付着性は８０重量％で、接着性が
１．２ｋｇｆ／ｃｍ２で、侵食量が４７ｍｍであった。[Comparative Example 3] Magnesia clinker 20 as a refractory raw material
% By weight and 35% by weight of dolomite clinker, and 45% by weight of alumina garnet,
These were mixed to obtain a thermal spray material. The test results of this thermal spray material were excellent in adhesion as in Comparative Example 2 described above, but were inferior in adhesiveness and corrosion resistance to the examples of the present invention. That is, the adhesiveness of Comparative Example 3 was 80% by weight, the adhesiveness was 1.2 kgf / cm 2 , and the erosion amount was 47 mm.
【００４１】[0041]
【実施例８】耐火原料としてマグネシアクリンカー７０
重量％とドロマイトクリンカー１５重量％を混合し、さ
らにアルミナ質ガーネットを１５重量％添加し、それら
を混合して溶射用耐火粉末を得た。この溶射用耐火粉末
を実際の転炉補修部への補修材として使用し、溶射施工
した。その耐用時間を測定したところ、比較のため行っ
た従来の溶射材の補修部分に比べて約２倍の耐用性を得
ることが判明した。[Embodiment 8] Magnesia clinker 70 as a refractory raw material
Wt% and 15 wt% of dolomite clinker were mixed, 15 wt% of alumina garnet was further added, and they were mixed to obtain a refractory powder for thermal spraying. The flame-retardant powder for thermal spraying was used as a repair material for the actual converter repair section, and was sprayed. When the service life was measured, it was found that the service life was about twice as high as that of the repaired portion of the conventional thermal spray material which was used for comparison.
【００４２】また、事前に転炉の補修時と同じ条件で煉
瓦パネル部へ溶射吹き付けを行って溶着層の特性を調査
したところ、本発明の溶射材が従来の溶射材に比較して
溶着性、物理特性において極めて優れていることが判明
した。すなわち、本発明の溶着層は、見掛気孔率が１．
１〜１．６で、吸水率が０．３〜０．５％で、接着率が
８５％であったのに対し、従来の溶射体は、見掛気孔率
が８〜１２％で、吸水率が２〜２．５％で、接着率が８
０％であった。Further, when the characteristics of the welded layer were investigated by spraying the brick panel portion under the same conditions as when the converter was repaired in advance, the sprayed material of the present invention showed better weldability than the conventional sprayed material. It was found that the physical properties were extremely excellent. That is, the weld layer of the present invention has an apparent porosity of 1.
1 to 1.6, the water absorption rate was 0.3 to 0.5%, and the adhesion rate was 85%, whereas the conventional thermal spray material has an apparent porosity of 8 to 12% and water absorption. The rate is 2 to 2.5% and the adhesion rate is 8
It was 0%.
【００４３】[0043]
【発明の効果】以上の説明から明らかなように、本発明
は焼結マグネシアクリンカー、電融マグネシアクリンカ
ー、焼結スピネル、ドロマイトクリンカー、ライムクリ
ンカーおよびアルミナの１種又はそれらの組合わせに、
ガーネットを所定の割合で混合したことを特徴とする溶
射用耐火粉末であるので、転炉等の補修材として使用し
た時、従来のものに比較して付着性、接着性及び侵食量
のいずれの点においても格段に優れている。As is apparent from the above description, the present invention provides one or a combination of sintered magnesia clinker, electrofused magnesia clinker, sintered spinel, dolomite clinker, lime clinker and alumina.
Since it is a refractory powder for thermal spraying characterized by mixing garnet in a predetermined ratio, when used as a repair material for converters, etc., any of the adhesiveness, adhesiveness and erosion amount compared to conventional ones It is also extremely superior in terms.
【００４４】また、本発明によれば、市販の一般原料を
使用できるため、従来のように加熱処理や造粒化処理等
の前処理を一切行う必要がなく、所望の耐火粉末を安価
に製造できる。Further, according to the present invention, since commercially available general raw materials can be used, it is not necessary to carry out any pretreatment such as heat treatment and granulation treatment as in the conventional case, and a desired refractory powder can be produced at low cost. it can.
【００４５】さらに、本発明によれば、原料メーカから
産出する一般定型耐火物や不定形耐火物に使用不可能な
いわゆる不要粒度の原料も適切な材料として十分に利用
することが可能となる。その点でも製造コストの低減が
はかれる。Further, according to the present invention, it is possible to sufficiently use a raw material having a so-called unnecessary particle size, which cannot be used for a general standard refractory or an irregular refractory produced from a raw material manufacturer, as an appropriate material. In that respect, the manufacturing cost can be reduced.
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 青木 忠 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (72)発明者 八木 重器 和歌山県和歌山市湊1850番地 住友金属 工業株式会社和歌山製鉄所内 (72)発明者 久保 吉一 和歌山県和歌山市湊1850番地 住友金属 工業株式会社和歌山製鉄所内 (72)発明者 水口 篤盛 大阪府大阪市中央区北浜４−５−33 住 友金属工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Aoki 1st Nanto, Ogakie-cho, Kariya city, Aichi Toshiba Ceramics Co., Ltd. Kariya Plant (72) Inventor Yagi Juki, 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Inside the Wakayama Works (72) Inventor Yoshikazu Kubo 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Inside the Wakayama Works (72) Inventor Atsumori Mizuguchi 4-5-33 Kitahama, Chuo-ku, Osaka City, Osaka Sumitomo Metal Industries Within the corporation
Claims (1)
シアクリンカー、焼結スピネル、ドロマイトクリンカ
ー、ライムクリンカーおよびアルミナの１種又はそれら
の組合わせ６０〜９８重量％からなる耐火原料に、ガー
ネット１〜４０重量％を混合したことを特徴とする溶射
用耐火粉末。1. A refractory raw material comprising 60 to 98% by weight of one of sintered magnesia clinker, electrofused magnesia clinker, sintered spinel, dolomite clinker, lime clinker and alumina , or a combination thereof. A refractory powder for thermal spraying, characterized in that 1 to 40% by weight of net is mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3144297A JP2549031B2 (en) | 1991-04-02 | 1991-04-02 | Fireproof powder for thermal spraying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3144297A JP2549031B2 (en) | 1991-04-02 | 1991-04-02 | Fireproof powder for thermal spraying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04305068A JPH04305068A (en) | 1992-10-28 |
| JP2549031B2 true JP2549031B2 (en) | 1996-10-30 |
Family
ID=15358796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3144297A Expired - Lifetime JP2549031B2 (en) | 1991-04-02 | 1991-04-02 | Fireproof powder for thermal spraying |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2549031B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387596B1 (en) * | 1996-05-29 | 2003-09-19 | 주식회사 포스코 | Spray refractory for repair of refining furnace |
| CN106699211A (en) * | 2016-12-28 | 2017-05-24 | 马鞍山蓝科再制造技术有限公司 | Hot spray coating capable of enhancing strength of automotive cover mould |
| CN113567294B (en) * | 2021-07-26 | 2022-09-16 | 中南大学 | Method for evaluating ring forming characteristics of oxidized pellet powder produced by coal-based chain grate-rotary kiln |
-
1991
- 1991-04-02 JP JP3144297A patent/JP2549031B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04305068A (en) | 1992-10-28 |
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