JPH10287478A - Carbon-containing flame spray material and its production - Google Patents
Carbon-containing flame spray material and its productionInfo
- Publication number
- JPH10287478A JPH10287478A JP9108349A JP10834997A JPH10287478A JP H10287478 A JPH10287478 A JP H10287478A JP 9108349 A JP9108349 A JP 9108349A JP 10834997 A JP10834997 A JP 10834997A JP H10287478 A JPH10287478 A JP H10287478A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- refractory
- flame
- spray material
- oxide
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、転炉等の鉄鋼製造
プロセスで用いられる窯炉の補修用として用いられる火
炎溶射材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame sprayed material used for repairing a kiln used in a steelmaking process such as a converter.
【０００２】[0002]
【従来の技術】窯炉の熱間補修方法として火炎溶射法が
用いられている。これは耐火物粉末を火炎で溶融させ、
稼働中の窯炉内表面に直接付着させて補修する方法であ
り、吹き付け法などと比較して付着用バインダーを含ま
ないため耐用性が高い。溶射材料として用いられる耐火
物粉末の成分は、補修する窯炉に使用されている耐火れ
んがの組成とは必ずしも同じではなく、溶融性や耐食性
を考慮して選択される。転炉ではＭｇＯ−スラグ質、Ｍ
ｇＯ−ＣａＯ−スラグ質の溶射材料が用いられており、
例えば特公昭５６−２３９５０号公報、特公昭６０−５
３２７３号公報ではマグネシアクリンカーにスラグを添
加した材質が、特公平２−４００２４号公報ではマグネ
シアクリンカーと石灰クリンカーとスラグからなる材質
が開示されている。2. Description of the Related Art Flame spraying has been used as a hot repair method for kilns. This melts the refractory powder with a flame,
This method repairs by directly attaching to the inner surface of the kiln during operation, and has high durability because it does not contain an adhesive binder as compared with the spraying method. The components of the refractory powder used as the thermal spray material are not necessarily the same as the composition of the refractory brick used in the kiln to be repaired, and are selected in consideration of meltability and corrosion resistance. In converter, MgO-slag, M
gO-CaO-slag spray material is used,
For example, JP-B-56-23950, JP-B-60-5
Japanese Patent Publication No. 3273 discloses a material obtained by adding slag to magnesia clinker, and Japanese Patent Publication No. 2-40024 discloses a material comprising magnesia clinker, lime clinker and slag.
【０００３】また溶鋼鍋にはＡｌ2 Ｏ3 −ＭｇＯ質、Ａ
ｌ2 Ｏ3 −ＭｇＯ−Ｃｒ2 Ｏ3 質が用いられており、例
えば特公昭６０−３５３１１号公報にはアルミナとクロ
ム質原料及びアルミナ−マグネシアスピネルからなる材
質が開示されている。溶射材料用の耐火物粉末に使用後
耐火物を用いる技術としては、特開平７−１８７８３０
号公報に使用後耐火物を溶射材料として調整する方法が
開示されている。[0003] The molten steel pot is made of Al 2 O 3 -MgO,
l 2 O 3 -MgO-Cr 2 O 3 quality are used, for example, Japanese Patent Publication for 60-35311 discloses alumina and chromium feedstock and alumina - Material consisting of magnesia spinel are disclosed. As a technique for using a refractory after use as a refractory powder for a thermal spray material, Japanese Patent Application Laid-Open No. 7-187830 discloses a technique.
Japanese Patent Application Laid-Open Publication No. H11-163,086 discloses a method of adjusting a refractory as a thermal spray material after use.
【０００４】[0004]
【発明が解決しようとする課題】従来の溶射材料は、前
述のようにＭｇＯ−ＣａＯ質やＡｌ2 Ｏ3 −ＭｇＯ質な
ど酸化物を原料としてこれらを溶融させて用いる。一方
窯炉に使用されている耐火物には、炭素を含有させるこ
とで耐スラグ性や耐熱スポール性を向上させた炭素含有
耐火物がある。そこで溶射施工体の耐スラグ性や耐熱ス
ポール性をさらに向上させるために炭素原料を配合する
試みがあるが、単純に炭素原料を従来の溶射材料に配合
しただけでは、溶融酸化物との濡れ性が悪いために付着
効率が低下したり、炭素原料が焼失するなどの問題があ
った。また炭素原料の溶融酸化物との効果的な濡れ改善
方法がなく、かつ高価であった。[Problems that the Invention is to Solve Conventional spray material is used an oxide such as MgO-CaO quality and Al 2 O 3 -MgO electrolyte to melt them as raw materials as described above. On the other hand, refractories used in kilns include carbon-containing refractories which have improved slag resistance and heat-resistant spall resistance by containing carbon. Therefore, there is an attempt to mix carbon materials to further improve the slag resistance and heat spalling resistance of the sprayed body. However, simply mixing the carbon material with the conventional sprayed material will not improve the wettability with the molten oxide. However, there was a problem that the adhesion efficiency was lowered due to the poor quality, and the carbon raw material was burned off. Further, there is no effective method for improving the wetting of the carbon raw material with the molten oxide, and the method is expensive.
【０００５】従来の使用後耐火物を利用する技術では、
必要としない成分を含む場合には分別除去し、除去でき
ない場合は事前処理を施すなど、使用後耐火物中の不要
成分の処理を行って利用する技術を開示しているが、溶
射材料として利用困難である成分の利用方法については
言及していない。[0005] In the conventional technology utilizing refractories after use,
Discloses technology that uses unnecessary components in refractories after use, such as separating and removing unnecessary components if they cannot be removed, and pre-processing if not possible. No mention is made of how to use the difficult components.
【０００６】そこで本発明は従来の溶射材料に配合する
炭素源に炭素含有耐火物の加工後屑または窯炉使用後廃
材を粉砕して得られる粒子を用い、更には該炭素含有耐
火物粒子の表面炭素を除去し酸化物で被覆することによ
って、溶融酸化物との濡れを改善するとともに、炭素の
焼失を抑制することで炭素含有を可能にした火炎溶射材
料を提供する。Accordingly, the present invention uses particles obtained by pulverizing the scraps after processing of carbon-containing refractories or waste materials after using a kiln as a carbon source to be blended with the conventional thermal spraying material. Provided is a flame sprayed material in which the surface carbon is removed and coated with an oxide to improve the wettability with a molten oxide and suppress the burning of carbon, thereby enabling carbon to be contained.
【０００７】[0007]
【課題を解決するための手段】前記の課題を解決するた
めに本発明では、主要構成成分が酸化物から成る窯炉補
修用火炎溶射材料において、炭素を含有する耐火物の加
工後屑または窯炉使用後廃材を粉砕して得られる粒径５
００〜５０μｍの炭素含有耐火物が、前記火炎溶射材料
に５〜７０重量％含まれていることを特徴とする炭素含
有火炎溶射材料を提供する。用いる炭素含有耐火物は、
炭素含有量２〜５０重量％であって炭素以外の成分がマ
グネシアおよびまたはアルミナを主成分とする酸化物で
ある。更には炭素含有耐火物の粉砕粒子、及びまたは該
炭素含有耐火物の粉砕粒子の表面層２０μｍ以上から炭
素成分を除去した炭素含有耐火物の表面及び表層の気孔
に、酸化物ゾル、金属アルコキシド、燐酸塩の内少なく
とも１種を被覆、充填した炭素含有耐火物を用いる炭素
含有火炎溶射材料およびその製造方法を提供する。According to the present invention, there is provided a flame spraying material for repairing a kiln whose main component is an oxide. Particle size 5 obtained by grinding waste material after furnace use
A carbon-containing flame-sprayed material characterized in that the flame-sprayed material has a carbon-containing refractory of 50 to 50 μm in an amount of 5 to 70% by weight. The carbon-containing refractory used is
A component having a carbon content of 2 to 50% by weight and other than carbon is an oxide mainly composed of magnesia and / or alumina. Furthermore, on the surface and pores of the carbon-containing refractory obtained by removing the carbon component from the surface layer of the carbon-containing refractory pulverized particles and / or the carbon-containing refractory pulverized particles of 20 μm or more, oxide sol, metal alkoxide, A carbon-containing flame sprayed material using a carbon-containing refractory coated and filled with at least one of phosphates, and a method for producing the same.
【０００８】[0008]
【発明の実施の形態】本発明は従来の溶射材料に配合す
る炭素源原料に、炭素含有耐火物の加工後屑または窯炉
使用後廃材を粉砕して得られる粒子を用いる。該粒子
は、炭素以外の酸化物成分が溶融または溶射原料と濡れ
やすいために、炭素を溶射施工体中に含有させることを
可能にする。BEST MODE FOR CARRYING OUT THE INVENTION The present invention uses, as a carbon source raw material to be blended with a conventional thermal spray material, particles obtained by grinding waste after processing of carbon-containing refractories or waste material after using a kiln. The particles allow carbon to be included in the sprayed article because oxide components other than carbon are easily melted or wet with the sprayed material.
【０００９】本発明に用いる炭素含有耐火物の粒径は、
５００〜５０μｍである。より好ましくは３００〜１０
０μｍである。従来の溶射原料は５００μｍ以下の粒度
からなるため、本発明においても溶射材料の流動特性を
従来材と変えないために、また炭素以外の酸化物成分が
溶融できるように、炭素含有耐火物の粉砕粒子径の上限
は５００μｍとする。しかしながら従来の溶射原料でも
経験されているように３００μｍ超の粒子はリバウンド
して付着性があまり高くないので、好ましくは３００μ
ｍ以下とする。The particle size of the carbon-containing refractory used in the present invention is as follows:
It is 500 to 50 μm. More preferably 300 to 10
0 μm. Since the conventional thermal spraying raw material has a particle size of 500 μm or less, the pulverization of the carbon-containing refractory in the present invention so as not to change the flow characteristics of the thermal spraying material from the conventional material and to melt oxide components other than carbon. The upper limit of the particle size is 500 μm. However, as has been experienced with conventional thermal spraying raw materials, particles having a particle size of more than 300 μm rebound and have a low adhesion, so that the particle size is preferably 300 μm.
m or less.
【００１０】一方５０μｍより小さい粒子は、炭素含有
耐火物の粉砕特性のために炭素含有量が増加して付着し
難くなるため、５０μｍ以上の粒子を用いる。より好ま
しくは１００μｍ以上である。１００μｍより小さい粒
子は、元の炭素含有耐火物の平均化学組成と異なる組成
の粒子が多くなるため、粒子の付着性にバラツキがでて
安定した特性が得られ難くなる。On the other hand, particles smaller than 50 μm use particles having a size of 50 μm or more because the carbon content increases due to the pulverizing characteristics of the carbon-containing refractory and it becomes difficult to adhere. It is more preferably at least 100 μm. Particles smaller than 100 μm have a large number of particles having a composition different from the average chemical composition of the original carbon-containing refractory, so that the adhesion of the particles varies, making it difficult to obtain stable characteristics.
【００１１】また炭素含有耐火物の粉砕粒子の配合量
は、５〜７０重量％である。５重量％未満では炭素の効
果がほとんど得られない。７０重量％を超えると、従来
の溶射原料の配合量が３０重量％未満となり、これが全
量溶融した場合でも溶射材料の付着歩留が低下する。The compounding amount of the pulverized particles of the carbon-containing refractory is 5 to 70% by weight. If it is less than 5% by weight, the effect of carbon is hardly obtained. If it exceeds 70% by weight, the amount of the conventional thermal spraying raw material is less than 30% by weight, and even when the entirety is melted, the adhesion yield of the thermal spraying material is reduced.
【００１２】本発明に用いる炭素含有耐火物は、炭素含
有量２〜５０重量％である。２重量％未満であると、本
発明の炭素含有効果は殆ど得られなくなるし、５０重量
％を超えると、炭素成分が炭素含有耐火物の主成分とな
るため、本発明の炭素含有耐火物への処理を施しても付
着性の向上が期待できない。また炭素含有耐火物の炭素
以外の成分はマグネシアおよびまたはアルミナを主成分
とする酸化物である。従来の溶射材料に配合して利用す
るにおいて、炭素以外の成分が従来の溶射材料と同等成
分であることが、溶融性や付着性を低下させないために
好ましいからである。The carbon-containing refractory used in the present invention has a carbon content of 2 to 50% by weight. If it is less than 2% by weight, the carbon-containing effect of the present invention can hardly be obtained, and if it exceeds 50% by weight, the carbon component becomes the main component of the carbon-containing refractory. No improvement in the adhesiveness can be expected even if the treatment is carried out. The components other than carbon of the carbon-containing refractory are oxides mainly composed of magnesia and / or alumina. This is because it is preferable that components other than carbon be equivalent to those of the conventional thermal spraying material when blended and used in the conventional thermal spraying material so as not to lower the meltability and the adhesion.
【００１３】炭素含有耐火物を粉砕して得られる粒子
は、本発明に用いる５００〜５０μｍの粒子、より好ま
しくは３００〜１００μｍの粒子であればほぼ元の耐火
物の平均組成からなる。しかしながら炭素含有耐火物の
粉砕特性のために小さな粒子ほど比較的炭素含有量が多
くなって付着し難い。そこで本発明では、炭素含有耐火
物の粉砕粒子の表面層２０μｍ以上から炭素成分を除去
した炭素含有耐火物を用いる。即ち表層の炭素成分を除
去することで、炭素以外の酸化物成分が表層の主成分と
なり、従来の溶射原料との溶融付着性が向上する。炭素
成分を除去する表面層の厚みは２０μｍ以上で、発明者
の試験では２０μｍ未満であると溶融付着性があまり向
上しなかった。The particles obtained by pulverizing the carbon-containing refractory comprise particles having a particle size of 500 to 50 μm used in the present invention, more preferably 300 to 100 μm, having substantially the average composition of the original refractory. However, due to the pulverizing characteristics of the carbon-containing refractory, smaller particles have a relatively higher carbon content and are less likely to adhere. Therefore, in the present invention, a carbon-containing refractory obtained by removing a carbon component from a surface layer of 20 μm or more of the ground particles of the carbon-containing refractory is used. That is, by removing the carbon component of the surface layer, the oxide component other than carbon becomes the main component of the surface layer, and the melt adhesion with the conventional thermal spraying material is improved. The thickness of the surface layer from which the carbon component was removed was not less than 20 μm, and in the test of the inventor, if it was less than 20 μm, the melt adhesion was not significantly improved.
【００１４】本発明では更に炭素含有耐火物の粉砕粒子
の溶融付着生を向上させるために、炭素含有耐火物の粉
砕粒子、及びまたは該炭素含有耐火物の粉砕粒子の表面
層２０μｍ以上から炭素成分を除去した炭素含有耐火物
の表面及び表層の気孔に、酸化物ゾル、金属アルコキシ
ド、燐酸塩の内少なくとも１種を被覆、充填した炭素含
有耐火物を用いる。酸化によって粉化しやすい炭素含有
耐火物は前記の表面炭素除去が困難であるため、炭素含
有耐火物の表面に酸化物の被覆を行うことによって従来
の溶射原料との溶融付着性を向上させる。また表面から
炭素成分を除去した炭素含有耐火物に対しては、炭素除
去によって生成した表層の気孔に酸化物を充填すること
で、緻密な粒子となって粒子強度が増し、また従来の溶
射原料との溶融付着性もより向上させることができる。
被覆、充填する物質としては、粒子表面に膜を形成しや
すく、気孔にも充填しやすい微粒子や液体状のものが良
く、本発明では酸化物ゾル、金属アルコキシド、燐酸塩
を用いる。用いる酸化物ゾル、金属アルコキシド、燐酸
塩については具体的な物質を規定しないが、好ましくは
炭素含有耐火物に含まれる酸化物を含む物質、または使
用する炭素含有耐火物中の酸化物と化合物を作り易い物
質を用いる。例えば炭素含有アルミナ質耐火物を用いる
場合は、アルミナゾル、アルミニウムプロポキシド、燐
酸アルミニウムである。In the present invention, in order to further improve the fusion adhesion of the pulverized carbon-containing refractory particles, the carbon component from the surface layer of 20 μm or more of the pulverized carbon-containing refractory particles and / or the pulverized particles of the carbon-containing refractory can be improved. A carbon-containing refractory is used in which at least one of an oxide sol, a metal alkoxide and a phosphate is coated and filled on the surface and pores of the surface layer of the carbon-containing refractory from which is removed. Since it is difficult to remove carbon from the surface of a carbon-containing refractory that is easily powdered by oxidation, the surface of the carbon-containing refractory is coated with an oxide to improve the melt adhesion to a conventional thermal spray material. Also, for carbon-containing refractories whose carbon components have been removed from the surface, by filling the pores of the surface layer formed by carbon removal with an oxide, the particles become denser particles and the particle strength increases. Can be further improved.
As the substance to be coated or filled, fine particles or liquids that easily form a film on the particle surface and easily fill pores are preferable. In the present invention, an oxide sol, metal alkoxide, or phosphate is used. The oxide sol, metal alkoxide, and phosphate used are not specifically defined, but preferably include a substance containing an oxide contained in the carbon-containing refractory, or an oxide and a compound in the carbon-containing refractory to be used. Use materials that are easy to make. For example, when a carbon-containing alumina refractory is used, alumina sol, aluminum propoxide, and aluminum phosphate are used.
【００１５】本発明の炭素含有火炎溶射材料の製造は、
先ず炭素を含有する耐火物の加工後屑または窯炉使用後
廃材を粉砕して得られる耐火物屑のうち粒径５００〜５
０μｍのものを、加熱酸化処理し、表面に炭素成分を除
去した脱炭層を設ける。粉砕粒子の表面から炭素を除去
する方法としては、例えばロータリーキルンを用い大気
中で加熱酸化する。次いで得られた耐火物屑を酸化物ゾ
ル、金属アルコキシド、燐酸塩のうち少なくとも１種を
含む水溶液に浸漬して該耐火物屑表面の脱炭層に、該酸
化物ゾル、金属アルコキシド、燐酸塩を充分含浸させ
る。浸漬中に減圧脱泡などを行いながら撹拌を行うとよ
り効果的に含浸できる。充分な充填を行った後大気中で
充分乾燥を行う。乾燥は熱風を吹き付けたり加熱乾燥炉
を用いて、該炭素含有耐火物中の残留水分量が１％以下
になるまでおこなう。残留水分が１％を越えて存在する
と、後工程での従来の溶射材料との混合において粉体の
流動性が損なわれる。最後に充分乾燥した炭素含有耐火
物は所定の配合量で従来と同様な方法で溶射材料と混合
する。The production of the carbon-containing flame sprayed material of the present invention comprises:
First, the particle size of the refractory waste obtained by pulverizing the waste after processing the refractory containing carbon or the waste material after using the kiln is 500 to 5 particles.
A decarburized layer of 0 μm is heated and oxidized to remove carbon components on the surface. As a method for removing carbon from the surface of the pulverized particles, for example, heat oxidation is performed in the air using a rotary kiln. Next, the obtained refractory waste is immersed in an aqueous solution containing at least one of oxide sol, metal alkoxide, and phosphate, and the oxide sol, metal alkoxide, and phosphate are added to the decarburized layer on the surface of the refractory waste. Impregnate well. If the stirring is performed while performing defoaming under reduced pressure during the immersion, the impregnation can be more effectively performed. After sufficient filling, sufficient drying is performed in the atmosphere. Drying is performed by blowing hot air or using a heating drying furnace until the residual moisture content in the carbon-containing refractory becomes 1% or less. If the residual moisture content exceeds 1%, the fluidity of the powder is impaired in the subsequent step of mixing with the conventional thermal spray material. Finally, the sufficiently dried carbon-containing refractory is mixed with a sprayed material in a predetermined blending amount in a conventional manner.
【００１６】[0016]
【実施例】表１に本発明の実施例及び比較例を示す。炭
素含有耐火物には、アルミナ−カーボン質（ＡＣ）、ア
ルミナ−炭化珪素−カーボン質（ＡＳＣ）、マグネシア
−カーボン質（ＭＣ）の使用後れんがを粉砕し、所定の
粒径のものを回収して用いた。また使用後れんが以外の
溶射原料として、アルミナには仮焼アルミナクリンカ
ー、スピネルには合成スピネルクリンカー、マグネシア
には焼結マグネシアクリンカー、ドロマイトには合成ド
ロマイトクリンカー、スラグには転炉スラグを用い、粒
度は全て２００〜５０μｍとした。これらの原料を表記
の組成に調合して溶射材料とした。比較例１２、１３は
従来の溶射材料である。EXAMPLES Table 1 shows examples of the present invention and comparative examples. For the carbon-containing refractories, alumina-carbonaceous (AC), alumina-silicon carbide-carbonaceous (ASC), and magnesia-carbonaceous (MC) are used. Used. As a spraying material other than used bricks, calcined alumina clinker is used for alumina, synthetic spinel clinker for spinel, sintered magnesia clinker for magnesia, synthetic dolomite clinker for dolomite, and converter slag for slag. Were all 200 to 50 μm. These raw materials were blended to the indicated composition to obtain a thermal spray material. Comparative Examples 12 and 13 are conventional thermal spray materials.
【００１７】溶射試験はプロパン−酸素の火炎を用い、
１２００℃程度に表面を予熱したマグクロ質れんがに行
った。付着歩留はれんがに付着した重量と溶射重量から
求めた。耐用性指数は溶射施工体に転炉スラグを吹き付
け、溶損した面積を求め、比較例１２を１００としたと
きの面積比で表した。The thermal spray test uses a propane-oxygen flame,
The test was performed on a magma brick whose surface was preheated to about 1200 ° C. The adhesion yield was determined from the weight attached to the brick and the sprayed weight. The durability index was obtained by spraying converter slag onto the sprayed body to determine the area damaged by melting, and expressed as an area ratio when Comparative Example 12 was set to 100.
【００１８】[0018]
【表１】 [Table 1]
【００１９】実施例１〜４はアルミナ−カーボン質の使
用後れんが屑を用いた例で、配合する溶射原料、表面の
炭素除去、被覆条件は表に示すように実施した。炭素含
有耐火物屑を用いることで耐用性は向上し、表面の炭素
除去や被覆を行うことで付着歩留も向上し、屑配合を増
すことができた。実施例５はアルミナ−炭化硅素−カー
ボン質の使用後れんが屑、実施例６はマグネシア−カー
ボン質の使用後れんが屑を用いた例であり、本例の場合
も付着歩留は同等で耐用性が向上した。Examples 1 to 4 are examples using bricks after use of alumina-carbon materials. The spraying raw materials to be blended, carbon removal on the surface, and coating conditions were carried out as shown in the table. The durability was improved by using carbon-containing refractory debris, and the adhesion yield was improved by removing and coating carbon on the surface, thereby increasing the composition of the debris. Example 5 is an example using bricks after use of alumina-silicon carbide-carbon, and Example 6 is an example using bricks after use of magnesia-carbon. Also in this example, the adhesion yield is the same and the durability is high. Improved.
【００２０】比較例７〜９は、アルミナ−カーボン質の
使用後れんが屑を用いた例であるが、比較例７は炭素含
有耐火物屑の配合が少なく本発明の効果は得られない。
比較例８は逆に炭素含有耐火物屑の配合が過剰のため付
着歩留が低下した。比較例９は炭素含有耐火物屑の粒径
の大きいものが施工時にリバウンドして付着歩留が低下
した。比較例１０はマグネシア−カーボン質の使用後れ
んが屑を用いた例であるが、微粒が多いために施工時に
飛散して付着歩留が低下した。比較例１１は炭素を含有
しないアルミナ−スピネル質の不定形耐火物屑を用いた
例であるが、耐用性において炭素の効果が得られなかっ
た。Comparative Examples 7 to 9 are examples in which bricks after use of alumina-carbon are used, but Comparative Example 7 has a small amount of carbon-containing refractory waste, and the effect of the present invention cannot be obtained.
On the contrary, in Comparative Example 8, the adhesion yield was reduced due to the excessive blending of the carbon-containing refractory waste. In Comparative Example 9, the carbon-containing refractory waste having a large particle diameter rebounded during construction, and the adhesion yield was reduced. Comparative Example 10 was an example in which brick waste was used after the use of magnesia-carbonaceous material, but because of the large number of fine particles, it was scattered during construction and the adhesion yield was reduced. Comparative Example 11 is an example in which alumina-spinel amorphous refractory waste containing no carbon was used, but the effect of carbon on the durability was not obtained.
【００２１】[0021]
【発明の効果】以上詳述したように、本発明により、溶
射施工体のスラグ耐食性が向上し、補修部の寿命を延長
できるだけでなく、加工後屑または窯炉使用後廃材を用
いて経済的に窯炉補修が行えるため、本発明は、工業的
に価値の高い発明であると言える。As described above in detail, according to the present invention, the slag corrosion resistance of a thermal sprayed body is improved, and the service life of the repaired part can be extended. Therefore, the present invention can be said to be an industrially valuable invention.
Claims (6)
火炎溶射材料において、炭素を含有する耐火物の加工後
屑または窯炉使用後廃材を粉砕して得られる粒径５００
〜５０μｍの炭素含有耐火物が、前記火炎溶射材料に５
〜７０重量％含まれていることを特徴とする炭素含有火
炎溶射材料。1. A flame spraying material for repairing a kiln, the main component of which is an oxide, wherein a particle diameter of 500 obtained by pulverizing scrap after processing of refractories containing carbon or waste material after using the kiln.
５０50 μm carbon-containing refractory is added to the flame sprayed material
A carbon-containing flame-sprayed material characterized by being contained in an amount of up to 70% by weight.
０重量％であって炭素以外の成分がマグネシアおよび／
またはアルミナを主成分とする酸化物であることを特徴
とする請求項１に記載の炭素含有火炎溶射材料。2. The refractory having a carbon content of 2 to 5 carbon atoms.
0% by weight and components other than carbon are magnesia and / or
The carbon-containing flame sprayed material according to claim 1, wherein the material is an oxide containing alumina as a main component.
０μｍ以上が炭素除去層であることを特徴とする請求項
１または請求項２に記載の炭素含有火炎溶射材料。3. The surface layer 2 of the ground particles of the carbon-containing refractory.
The carbon-containing flame-sprayed material according to claim 1 or 2, wherein 0 μm or more is a carbon removal layer.
表層の気孔に、酸化物ゾル、金属アルコキシド、燐酸塩
から選ばれる１種または２種以上を被覆し、または充填
した炭素含有耐火物を用いることを特徴とする請求項１
ないし請求項３のいずれか１項に記載の炭素含有火炎溶
射材料。4. A carbon-containing refractory in which one or two or more selected from oxide sols, metal alkoxides, and phosphates are coated or filled on the surface and the pores of the surface layer of the pulverized particles of the carbon-containing refractory. 2. The method according to claim 1, wherein
4. The carbon-containing flame sprayed material according to claim 3. 5.
炉使用後廃材を粉砕して得られる耐火物屑のうち粒径５
００〜５０μｍのものを、加熱酸化処理し、表面に炭素
成分を除去した脱炭層を設け、これを主要構成成分が酸
化物から成る窯炉補修用火炎溶射材料に５〜７０重量％
の割合で配合することを特徴とする炭素含有火炎溶射材
の製造方法。5. A refractory scrap obtained by grinding carbon-containing refractory waste after processing or waste material after use in a kiln has a particle size of 5%.
The material having a thickness of 100 to 50 μm is heated and oxidized to form a decarburized layer on the surface of which a carbon component has been removed.
A method for producing a carbon-containing flame sprayed material, characterized in that:
ル、金属アルコキシド、燐酸塩から選ばれる１種または
２種以上を含む水溶液に浸漬して、耐火物屑表面の脱炭
層に、酸化物ゾル、金属アルコキシド、燐酸塩から選ば
れる１種または２種以上を充分含浸させ、その後、乾燥
して含水分量１％以下に調整した後、前記窯炉補修用火
炎溶射材料に配合することを特徴とする請求項５に記載
の炭素含有火炎溶射材の製造方法。6. The refractory waste provided with a decarburized layer is immersed in an aqueous solution containing one or more selected from oxide sols, metal alkoxides, and phosphates to form a decarburized layer on the surface of the refractory waste. , An oxide sol, a metal alkoxide, or a phosphate, sufficiently impregnated, and then dried to adjust the water content to 1% or less, and then mixed with the flame spray material for furnace repair. The method for producing a carbon-containing flame sprayed material according to claim 5, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108349A JPH10287478A (en) | 1997-04-11 | 1997-04-11 | Carbon-containing flame spray material and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108349A JPH10287478A (en) | 1997-04-11 | 1997-04-11 | Carbon-containing flame spray material and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10287478A true JPH10287478A (en) | 1998-10-27 |
Family
ID=14482462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9108349A Withdrawn JPH10287478A (en) | 1997-04-11 | 1997-04-11 | Carbon-containing flame spray material and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10287478A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030071444A (en) * | 2002-02-28 | 2003-09-03 | 주식회사 한타엠엔비 | Preparation of powder for Thermal spray coatings from steel powder slags |
| KR100601082B1 (en) * | 1998-12-29 | 2006-09-27 | 재단법인 포항산업과학연구원 | Magnesia-Graphite Spray Material and Manufacturing Method Thereof |
| JP2010111913A (en) * | 2008-11-06 | 2010-05-20 | Nippon Steel Corp | Thermal spraying material and method for producing the same and thermal spraying-executed body |
| JP2011121798A (en) * | 2009-12-09 | 2011-06-23 | Koua Fireproofing Industries Co Ltd | Spraying repairing material using used brick |
| CN106153550A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content based on SVM online Real-time and Dynamic Detection method |
| CN106153551A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content based on SVM online Real-time and Dynamic Detection system |
| CN106153552A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content online Real-time and Dynamic Detection system |
-
1997
- 1997-04-11 JP JP9108349A patent/JPH10287478A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100601082B1 (en) * | 1998-12-29 | 2006-09-27 | 재단법인 포항산업과학연구원 | Magnesia-Graphite Spray Material and Manufacturing Method Thereof |
| KR20030071444A (en) * | 2002-02-28 | 2003-09-03 | 주식회사 한타엠엔비 | Preparation of powder for Thermal spray coatings from steel powder slags |
| JP2010111913A (en) * | 2008-11-06 | 2010-05-20 | Nippon Steel Corp | Thermal spraying material and method for producing the same and thermal spraying-executed body |
| JP2011121798A (en) * | 2009-12-09 | 2011-06-23 | Koua Fireproofing Industries Co Ltd | Spraying repairing material using used brick |
| CN106153550A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content based on SVM online Real-time and Dynamic Detection method |
| CN106153551A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content based on SVM online Real-time and Dynamic Detection system |
| CN106153552A (en) * | 2015-04-10 | 2016-11-23 | 南京理工大学 | Converter steel-smelting molten steel carbon content online Real-time and Dynamic Detection system |
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| A300 | Withdrawal of application because of no request for examination |
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