JP2022053646A - Extending method for unshaped refractory - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002893 slag Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000011819 refractory material Substances 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- 230000001788 irregular Effects 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims description 5
- 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 claims description 5
- 229910052596 spinel Inorganic materials 0.000 claims description 5
- 239000011029 spinel Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 abstract description 15
- 230000001070 adhesive effect Effects 0.000 abstract description 15
- 238000012360 testing method Methods 0.000 description 17
- 239000002994 raw material Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
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Abstract
Description
本発明は、使用後あるいは使用中の不定形耐火物に、新たな不定形耐火物の原料を継ぎ足す不定形耐火物の継ぎ足し施工方法に関する。 The present invention relates to a method for adding a new amorphous refractory material to an amorphous refractory after use or in use.
耐火物は鉄鋼精錬、非鉄精錬、ガラスの溶解炉、セメント焼成炉、ごみを燃やす焼却炉など、様々な設備に利用されている。不定形耐火物の流し込み施工では、一度度流し込み施工した不定形耐火物が損傷すると、不定形耐火物の全てを解体し、新たに施工し直すことが多い。しかしながら、不定形耐火物の流し込み特性を利用し、損傷した部分にのみ新たな不定形耐火物の原料を流し込んで継ぎ足し施工できれば、耐火物コストおよび補修コストの削減につながるだけでなく、廃耐火物の削減にも貢献できる。 Refractories are used in various facilities such as steel smelting, non-ferrous smelting, glass melting furnaces, cement firing furnaces, and waste burning incinerators. In the pouring work of the amorphous refractory, if the amorphous refractory that has been poured once is damaged, it is often the case that all the amorphous refractories are dismantled and reconstructed. However, if it is possible to use the pouring characteristics of the amorphous refractory and add new raw material for the amorphous refractory only to the damaged part, it will not only reduce the cost of the refractory and the repair cost, but also the waste refractory. Can also contribute to the reduction of.
不定形耐火物を継ぎ足し施工するに際しては、不定形耐火物の継ぎ足し界面の接着強度を確保することが重要である。この継ぎ足し界面の接着強度を確保する技術として、特許文献１には、不定形耐火物の継ぎ足し施工を行う被補修表層に、酸化物耐火原料粉末、有機バインダー、ＳｉＣまたはＣ粉末で構成される中間層を形成させた後に継ぎ足し施工を行い、当該施工部を養生、乾燥させた後、マイクロ波を照射して接着強度を発現させる技術が開示されている。 When adding an amorphous refractory, it is important to secure the adhesive strength at the interface of the irregular refractory. As a technique for ensuring the adhesive strength of the replenishment interface, Patent Document 1 describes an intermediate composed of an oxide refractory raw material powder, an organic binder, SiC or C powder on the surface layer to be repaired for replenishing an amorphous refractory material. Disclosed is a technique in which a layer is formed, then replenished, and the construction portion is cured and dried, and then irradiated with microwaves to develop adhesive strength.
特許文献１に開示された技術では、被補修表層に酸化物耐火原料粉末、有機バインダー、ＳｉＣまたはＣ粉末で構成される中間層を形成し、さらに、養生、乾燥させた後にマイクロ波を照射するので加工の手間がかかり加工コストが高くなる、という課題があった。本発明は、このような従来技術の課題を鑑みてなされたものであり、その目的は、簡便な方法で継ぎ足し部の接着強度を高めることができる不定形耐火物の継ぎ足し施工方法を提供することである。 In the technique disclosed in Patent Document 1, an intermediate layer composed of an oxide fireproof raw material powder, an organic binder, SiC or C powder is formed on the surface layer to be repaired, and further cured and dried, and then irradiated with microwaves. Therefore, there is a problem that it takes time and effort for processing and the processing cost becomes high. The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a method for adding an amorphous refractory material capable of increasing the adhesive strength of the added portion by a simple method. Is.
上記課題を解決するための手段は、以下の通りである。
（１）不定形耐火物の継ぎ足し施工方法であって、継ぎ足し施工する不定形耐火物の継ぎ足し面におけるスラグが付着した付着面の面積率を５０％以下にした後に、前記継ぎ足し面に新たな不定形耐火物を継ぎ足し施工する、不定形耐火物の継ぎ足し施工方法。
（２）前記継ぎ足し面に０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下の水を付着させた後に、新たな不定形耐火物を継ぎ足し施工する、（１）に記載の不定形耐火物の継ぎ足し施工方法。
（３）前記不定形耐火物は、アルミナ－マグネシア質、アルミナ－スピネル質、アルミナ－マグネシア－カーボン質、アルミナ－スピネル－カーボン質、アルミナ－炭化ケイ素－カーボン質、アルミナ－ろう石－炭化ケイ素－カーボン質、炭化ケイ素－アルミナ－カーボン質、または、アルミナ－カーボン－炭化ケイ素質の不定形耐火物である、（１）または（２）に記載の不定形耐火物の継ぎ足し施工方法。
The means for solving the above problems are as follows.
(1) This is a method of replenishing an amorphous refractory, and after reducing the area ratio of the adhering surface to which slag is attached on the replenishing surface of the amorphous refractory to 50% or less, a new defect is made on the replenishing surface. A method of adding and constructing amorphous refractories.
(2) The amorphous refractory according to (1), wherein a new amorphous refractory is added after adhering water of 0.010 g / cm 2 or more and 0.250 g / cm 2 or less to the additional surface. Replenishment construction method.
(3) The amorphous refractory includes alumina-magnesia, alumina-spinel, alumina-magnesia-carbon, alumina-spinel-carbon, alumina-silicon carbide-carbon, alumina-waxite-silicon carbide-. The method for adding an amorphous refractory according to (1) or (2), which is a carbonaceous, silicon carbide-alumina-carbonaceous, or alumina-carbon-silicon carbide amorphous refractory.
本発明に係る不定形耐火物の継ぎ足し施工方法では、不定形耐火物の継ぎ足し面に付着したスラグの面積率を５０％以下にした後に、当該継ぎ足し面に新たな不定形耐火物を継ぎ足し施工することで、継ぎ足し部の接着強度を高めることができる。これのため、本発明に係る不定形耐火物の継ぎ足し施工方法を実施することで、従来技術のように加工の手間をかけることなく、簡便に継ぎ足し部の接着強度を高めながら、新たな不定形耐火物を継ぎ足し施工できる。 In the method for replenishing an amorphous refractory according to the present invention, after the area ratio of slag adhering to the replenished surface of the amorphous refractory is reduced to 50% or less, a new amorphous refractory is replenished to the replenished surface. As a result, the adhesive strength of the replenished portion can be increased. Therefore, by implementing the method for adding an amorphous refractory material according to the present invention, a new amorphous shape can be easily increased while increasing the adhesive strength of the added portion without taking the trouble of processing as in the prior art. Refractory materials can be added for construction.
以下、本発明を本発明の実施形態を通じて説明する。本実施形態に係る不定形耐火物の継ぎ足し施工方法で継ぎ足し施工される不定形耐火物は、鉄鋼精錬炉、非鉄精錬炉やごみを燃やす焼却炉（以後、「鉄鋼精錬炉等」と記載する。）などで使用される不定形耐火物である。鉄鋼精錬炉等で使用された不定形耐火物の表面にはスラグが固着していることがある。これは、鉄鋼精錬炉等が稼働されていない非稼働中に耐火物表面温度が下がり、この温度低下により耐火物表面に付着していたスラグが固着したものである。ここで、スラグとは、鉄鋼精錬、非鉄精錬工程において、製品から炭素やリン、硫黄などの不純物元素を取り除く工程や、ごみを燃やす焼却工程で発生する酸化物を主原料とする副産物である。 Hereinafter, the present invention will be described through embodiments of the present invention. The amorphous refractories to be added and constructed by the method of adding and constructing an amorphous refractory according to the present embodiment are referred to as a steel smelting furnace, a non-iron smelting furnace and an incinerator for burning garbage (hereinafter, "steel smelting furnace, etc."". ) Etc., it is an irregular refractory material. Slag may adhere to the surface of amorphous refractories used in steel smelters and the like. This is because the surface temperature of the refractory drops while the steel smelting furnace or the like is not in operation, and the slag adhering to the surface of the refractory adheres due to this temperature drop. Here, slag is a by-product whose main raw material is oxides generated in a step of removing impurity elements such as carbon, phosphorus and sulfur from a product in a steel refining and non-ferrous refining step and a step of incineration for burning waste.
スラグが固着した不定形耐火物の表面に、新たな不定形耐火物を継ぎ足し施工すると、スラグと不定形耐火物との界面が脆弱部となり、継ぎ足し部の接着強度が低下する。このため、本実施形態に係る不定形耐火物の継ぎ足し施工方法では、新たな不定形耐火物を継ぎ足し施工する前に、不定形耐火物の継ぎ足し面に対するスラグ付着面の面積率が５０％以下になるまで、不定形耐火物の継ぎ足し面に付着したスラグを除去する。これにより、不定形耐火物の継ぎ足し部の接着強度を高めながら、不定形耐火物を継ぎ足し施工できる。なお、スラグの付着量が少なくなればなるほど継ぎ足し部の接着強度は高まるので、スラグ付着面の面積率の下限は０％である。 When a new amorphous refractory is added to the surface of the amorphous refractory to which the slag is fixed, the interface between the slag and the amorphous refractory becomes a fragile portion, and the adhesive strength of the added portion is reduced. Therefore, in the method of replenishing the amorphous refractory according to the present embodiment, the area ratio of the slag adhering surface to the replenished surface of the amorphous refractory is 50% or less before the new amorphous refractory is replenished. Until then, remove the slag adhering to the replenishment surface of the amorphous refractory. As a result, it is possible to replenish the amorphous refractory while increasing the adhesive strength of the replenished portion of the amorphous refractory. Since the adhesive strength of the replenished portion increases as the amount of slag adhered decreases, the lower limit of the area ratio of the slag adhered surface is 0%.
不定形耐火物の継ぎ足し面に固着したスラグは、ハンマーやピッケル等を用いて不定形耐火物の表面からスラグを剥がすことで除去してもよく、また、不定形耐火物の継ぎ足し面に固着したスラグをグラインドすることで除去してもよい。 The slag stuck to the joint surface of the amorphous refractory may be removed by peeling the slag from the surface of the amorphous refractory using a hammer, ice ax, etc., or fixed to the joint surface of the amorphous refractory. It may be removed by grinding the slag.
継ぎ足し施工する不定形耐火物の継ぎ足し面は、不定形耐火物の稼働面において溶損等により損傷した部分の表面である。このため、不定形耐火物の継ぎ足し面の面積は、不定形耐火物の施工図面に基づき、施工直後の不定形耐火物における稼働面側の表面形状と継ぎ足し施工する時点の不定形耐火物における稼働面側の表面形状との差分形状から求められる。また、当該差分形状は、表面プロフィール計を用いて測定された施工直後の不定形耐火物における稼働面側の表面形状と、継ぎ足し施工する時点の不定形耐火物における稼働面側の表面形状とから特定できる。 The replenishment surface of the amorphous refractory to be replenished is the surface of the portion of the working surface of the amorphous refractory that has been damaged due to melting damage or the like. For this reason, the area of the replenishment surface of the amorphous refractory is based on the construction drawing of the amorphous refractory, and the surface shape on the working surface side of the amorphous refractory immediately after construction and the operation of the amorphous refractory at the time of replenishment. It is obtained from the difference shape from the surface shape on the surface side. The difference shape is determined from the surface shape on the working surface side of the amorphous refractory immediately after construction measured using a surface profile meter and the surface shape on the working surface side of the amorphous refractory at the time of replenishment. Can be identified.
スラグ付着面の面積は、例えば、鉄鋼精錬炉に用いられている不定形耐火物の稼働面側を撮像した画像データを解析することで求められる。カーボンを含有しない不定形耐火物の色は灰色であり、また、カーボンを含有する不定形耐火物の色は黒味かかった灰色である。一方、スラグの色はタールのような黒色であり、色および質感が異なることから、特定された差分形状に対応した継ぎ足し面において、スラグが付着した付着面とスラグが付着していない継ぎ足し面とを画像データを解析することで区別し、スラグが付着した付着面の面積を継ぎ足し面の面積で除し、１００を乗じることでスラグが付着した付着面の面積率を求めることができる。 The area of the slag adhering surface can be obtained, for example, by analyzing image data obtained by capturing an image of the working surface side of an amorphous refractory used in a steel smelting furnace. The color of the amorphous refractory that does not contain carbon is gray, and the color of the amorphous refractory that contains carbon is blackish gray. On the other hand, the color of the slag is black like tar, and the color and texture are different. Therefore, in the replenishment surface corresponding to the specified difference shape, the replenishment surface with slag and the replenishment surface without slag Is distinguished by analyzing the image data, the area of the adhered surface to which the slag is attached is divided by the area of the added surface, and the area ratio of the adhered surface to which the slag is attached can be obtained by multiplying by 100.
また、継ぎ足し施工する不定形耐火物の継ぎ足し面に０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下の水を付着させてから新たな不定形耐火物を継ぎ足し施工することが好ましい。継ぎ足し施工する不定形耐火物の継ぎ足し面が乾燥状態（水の付着量が０．０１０ｇ／ｃｍ２未満）であると、新たに継ぎ足す不定形耐火物原料中の水分が元の不定形耐火物に吸収され、水分が少なくなった接合界面が脆弱部となるので接合部の強度が低下する。また、不定形耐火物の継ぎ足し面の水付着量が０．２５０ｇ／ｃｍ２より多くなると、接合界面に水が過剰にある状態となり、新たに継ぎ足す耐火物原料中において、バインダーに対する水の量が過剰になって接合部の強度が低下する。したがって、継ぎ足し施工する不定形耐火物の継ぎ足し面に付着させる水分量は０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下の範囲内であることが好ましい。 Further, it is preferable to add water of 0.010 g / cm 2 or more and 0.250 g / cm 2 or less to the replenishing surface of the amorphous refractory to be replenished, and then replenish the new amorphous refractory. If the replenished surface of the amorphous refractory to be replenished is dry (water adhesion is less than 0.010 g / cm 2 ), the moisture in the newly replenished amorphous refractory raw material is the original amorphous refractory. The strength of the joint is reduced because the joint interface, which is absorbed by the water and has less water, becomes a fragile part. Further, when the amount of water adhering to the replenishment surface of the amorphous refractory becomes more than 0.250 g / cm 2 , the water becomes excessive at the joint interface, and the amount of water with respect to the binder in the newly replenished refractory raw material. Is excessive and the strength of the joint is reduced. Therefore, the amount of water adhering to the replenished surface of the amorphous refractory to be replenished is preferably in the range of 0.010 g / cm 2 or more and 0.250 g / cm 2 or less.
継ぎ足し施工する不定形耐火物の継ぎ足し面に水を付着させる方法は、例えば、水の流量を制御できるスプレーノズルを有する散水設備を用いて不定形耐火物の継ぎ足し面に水を塗布してよく、霧吹き状に散水可能なスプレーボトルを用いて不定形耐火物の継ぎ足し面に水を塗布してもよい。水を塗布した後は、継ぎ足し面の水が乾かないように、塗布後２時間以内に新たな不定形耐火物を継ぎ足し施工することが好ましく、塗布後１時間以内に新たな不定形耐火物を継ぎ足し施工することがより好ましい。また、継ぎ足し施工する環境は、不定形耐火物の表面に付着させた水の蒸発を抑制することを目的として、温度が０℃以上４０℃以下であり、湿度が３０％以上１００％以下である環境で継ぎ足し施工することが好ましい。 As a method of adhering water to the replenishment surface of the irregular refractory to be replenished, for example, water may be applied to the replenishment surface of the irregular refractory using a sprinkler having a spray nozzle capable of controlling the flow rate of water. Water may be applied to the replenishment surface of the irregular refractory using a spray bottle that can be sprayed in the form of a mist. After applying water, it is preferable to add a new amorphous refractory within 2 hours after application so that the water on the replenished surface does not dry, and within 1 hour after application, add a new amorphous refractory. It is more preferable to add and construct. In addition, the environment for replenishment is a temperature of 0 ° C. or higher and 40 ° C. or lower, and a humidity of 30% or higher and 100% or lower for the purpose of suppressing evaporation of water adhering to the surface of the amorphous refractory. It is preferable to add it in the environment.
実施形態に係る不定形耐火物の継ぎ足し施工方法で継ぎ足し施工される不定形耐火物は、例えば、アルミナ－マグネシア質、アルミナ－スピネル質、アルミナ－マグネシア－カーボン質、アルミナ－スピネル－カーボン質、アルミナ－炭化ケイ素－カーボン質、アルミナ－ろう石－炭化ケイ素－カーボン質、炭化ケイ素－アルミナ－カーボン質、または、アルミナ－カーボン－炭化ケイ素質の不定形耐火物である（含有量が多い順に成分を記載する）。これらの不定形耐火物を本実施形態に係る不定形耐火物の継ぎ足し施工方法で継ぎ足し施工することで、従来技術のように加工の手間をかけることなく、簡便に継ぎ足し部の接着強度を向上させながら、新たな不定形耐火物を継ぎ足し施工できる。そして、このように不定形耐火物の継ぎ足し施工をすることで、耐火物コストおよび補修コストの削減だけでなく、廃耐火物の削減にも貢献できる。 The amorphous refractories to be replenished and constructed by the method of replenishing the amorphous refractories according to the embodiment are, for example, alumina-magnesia, alumina-spinel, alumina-magnesia-carbon, alumina-spinel-carbon, alumina. -Silicon Carbide-Carbonide, Alumina-Frozen-Silicon Carbide-Carbonide, Silicon Carbide-Alumina-Carbide, or Alumina-Carbon-Silicon Carbide Atypical Refractories (ingredients in descending order of content) Describe). By adding and constructing these amorphous refractories by the method of adding the amorphous refractories according to the present embodiment, the adhesive strength of the added portion can be easily improved without the labor of processing as in the conventional technique. However, new amorphous refractories can be added and constructed. By adding the amorphous refractory material in this way, it is possible to contribute not only to the reduction of the refractory material cost and the repair cost but also to the reduction of the waste refractory material.
次に、本実施形態に係る不定形耐火物の継ぎ足し施工方法を実施して継ぎ足し施工した実施例を説明する。本実施例ではＪＩＳ Ｒ ２５５３「キャスタブル耐火物の強さ試験方法」に準拠して作製された不定形耐火物の試験片を用いた。試験片の大きさは４０ｍｍ×４０ｍｍ×１６０ｍｍである。当該試験片を３点曲げ強度試験を行って試験片を２分割し、その断面を継ぎ足し面とした。作製した不定形耐火物の組成を下記表１に示す。 Next, an embodiment in which the irregular refractory material is replenished and constructed according to the present embodiment will be described. In this example, a test piece of an amorphous refractory prepared in accordance with JIS R 2553 "Strength test method for castable refractory" was used. The size of the test piece is 40 mm × 40 mm × 160 mm. The test piece was subjected to a three-point bending strength test, the test piece was divided into two, and the cross section thereof was used as a joint surface. The composition of the prepared amorphous refractory is shown in Table 1 below.
不定形耐火物の試験片の継ぎ足し面（４０ｍｍ×４０ｍｍ）に、粉末状のスラグを所定量置き、その後、大気雰囲気にて１３５０℃で３時間焼成することで、継ぎ足し面にスラグを付着させた。スラグ付着前後の試験片の重量を計測し、その重量増加分からスラグの付着量を算出した。また、スラグ付着面の面積率は、スラグ付着前後の継ぎ足し面をデジタルカメラで撮像して生成された画像データを解析することで継ぎ足し面に対するスラグ付着面の面積率（％）を算出した。 A predetermined amount of powdered slag was placed on the replenishment surface (40 mm × 40 mm) of the test piece of the amorphous refractory, and then fired at 1350 ° C. for 3 hours in an air atmosphere to attach the slag to the replenishment surface. .. The weight of the test piece before and after slag adhesion was measured, and the amount of slag adhesion was calculated from the weight increase. As for the area ratio of the slag-attached surface, the area ratio (%) of the slag-attached surface to the slag-attached surface was calculated by analyzing the image data generated by imaging the replenished surface before and after the slag-attached surface with a digital camera.
また、不定形耐火物の試験片の継ぎ足し面に筆を用いて水を所定量付着させた。水の付着量は、水の付着前後の試験片の重量を計測し、その重量増加分から水の付着量を算出した。継ぎ足し面に水を付着させた後、ただちに試験片を金型に挿入し、試験片の継ぎ足し面に同じ種類の不定形耐火物の原料を金型に流し込み、温度２０±３℃、湿度８０％以上の雰囲気下で２４時間養生した後、脱型して強度測定用の試験片を作製した。強度試験用の試験片に上述した３点曲げ強度試験を実施し、試験片の常温曲げ強度を測定した。使用した不定形耐火物の種類、スラグ付着面の面積率、スラグ付着量、水付着量および常温曲げ強度の測定結果を下記表３、４に示す。 In addition, a predetermined amount of water was attached to the replenishment surface of the test piece of the amorphous refractory using a brush. For the amount of water adhering, the weight of the test piece before and after the adhering of water was measured, and the amount of adhering water was calculated from the increase in the weight. Immediately after adhering water to the replenishment surface, the test piece is inserted into the mold, and the same type of amorphous refractory raw material is poured into the replenishment surface of the test piece, and the temperature is 20 ± 3 ° C. and the humidity is 80%. After curing for 24 hours in the above atmosphere, the mold was removed to prepare a test piece for strength measurement. The above-mentioned three-point bending strength test was carried out on the test piece for the strength test, and the room temperature bending strength of the test piece was measured. The measurement results of the type of amorphous refractory used, the area ratio of the slag adhesion surface, the slag adhesion amount, the water adhesion amount and the room temperature bending strength are shown in Tables 3 and 4 below.
発明例１～４０は、継ぎ足し面におけるスラグ付着面の面積率を５０％以下にして不定形耐火物原料を継ぎ足し施工した施工例である。一方、比較例１～１７は、継ぎ足し面におけるスラグ付着面の面積率を５０％より高くして不定形耐火物原料を継ぎ足し施工した施工例である。表３、４に示すように、継ぎ足し面におけるスラグ付着面の面積率を５０％以下にして新たな不定形耐火物を継ぎ足し施工した不定形耐火物の曲げ強度の最小値が０．２８ＭＰａ（発明例２３、３９）であったのに対し、継ぎ足し面におけるスラグ付着面の面積率を５０％より高くして新たな不定形耐火物を継ぎ足し施工した不定形耐火物の曲げ強度の最大値は０．１３ＭＰａ（比較例４）であった。これらの結果から、不定形耐火物の継ぎ足し面に新たな不定形耐火物を継ぎ足し施工するにあたり、継ぎ足し面におけるスラグ付着面の面積率を５０％以下にすることで、継ぎ足し施工された不定形耐火物の継ぎ足し部の接着強度を向上できることが確認された。 Inventive Examples 1 to 40 are construction examples in which the area ratio of the slag adhering surface on the replenished surface is set to 50% or less and the amorphous refractory raw material is replenished. On the other hand, Comparative Examples 1 to 17 are construction examples in which the area ratio of the slag adhering surface on the replenished surface is made higher than 50% and the amorphous refractory raw material is replenished. As shown in Tables 3 and 4, the minimum bending strength of the amorphous refractory constructed by adding a new amorphous refractory with the area ratio of the slag adhering surface on the additional surface set to 50% or less is 0.28 MPa (invention). In contrast to Examples 23 and 39), the maximum value of the bending strength of the amorphous refractory constructed by adding a new amorphous refractory by increasing the area ratio of the slag-attached surface on the additional surface to more than 50% is 0. It was .13 MPa (Comparative Example 4). Based on these results, when adding a new amorphous refractory to the additional surface of the amorphous refractory, the area ratio of the slag-attached surface on the additional surface was set to 50% or less, and the irregular refractory was added. It was confirmed that the adhesive strength of the replenishment part of the object could be improved.
また、発明例１－３と発明例７－９は、不定形耐火物の種類とスラグ付着面の面積率が同じで、継ぎ足し面における水付着量のみが異なる継ぎ足し施工例である。発明例１－３は、継ぎ足し面の水付着量が０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下を満足する継ぎ足し施工例であり、その曲げ強度は０．７０～２．６０ＭＰａとなった。一方、発明例７－９は、継ぎ足し面の水付着量が０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下を満足しない継ぎ足し施工例であり、その曲げ強度は０．３１～０．４０ＭＰａとなった。 Further, Invention Example 1-3 and Invention Example 7-9 are examples of replenishment work in which the type of amorphous refractory and the area ratio of the slag adhering surface are the same, but only the amount of water adhering to the replenishing surface is different. Invention Examples 1-3 are examples of replenishment work in which the amount of water adhering to the replenishment surface is 0.010 g / cm 2 or more and 0.250 g / cm 2 or less, and the bending strength thereof is 0.70 to 2.60 MPa. rice field. On the other hand, Invention Examples 7-9 are examples of replenishment work in which the amount of water adhering to the replenishment surface does not satisfy 0.010 g / cm 2 or more and 0.250 g / cm 2 or less, and the bending strength thereof is 0.31 to 0.40 MPa. It became.
また、他の不定形耐火物においても、継ぎ足し面の水付着量が０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下を満足する継ぎ足し施工で施工された不定形耐火物の曲げ強度は、継ぎ足し面の水付着量が０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下を満足しない継ぎ足し施工で施工された不定形耐火物の曲げ強度よりも高くなった。これらの結果から、不定形耐火物の継ぎ足し面に新たな不定形耐火物を継ぎ足し施工するにあたり、継ぎ足し面における水の付着量を０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下にすることが好ましく、これにより、継ぎ足し施工された不定形耐火物の継ぎ足し部の接着強度を向上できることが確認された。 Further, also in other amorphous fireproof materials, the bending strength of the amorphous fireproof material constructed by the replenishment work satisfying the water adhesion amount of 0.010 g / cm 2 or more and 0.250 g / cm 2 or less on the replenishment surface is The amount of water adhering to the replenishment surface was 0.010 g / cm 2 or more and 0.250 g / cm 2 or less, which was higher than the bending strength of the amorphous fireproof material constructed by the replenishment work. Based on these results, when adding a new amorphous refractory to the additional surface of the amorphous refractory, the amount of water adhering to the additional surface should be 0.010 g / cm 2 or more and 0.250 g / cm 2 or less. This is preferable, and it has been confirmed that this can improve the adhesive strength of the replenished portion of the amorphous refractory that has been replenished.
表３の発明例１－４０に示すように、不定形耐火物として、アルミナ－マグネシア質、アルミナ－スピネル質、アルミナ－マグネシア－カーボン質、アルミナ－スピネル－カーボン質、アルミナ－炭化ケイ素－カーボン質、アルミナ－ろう石－炭化ケイ素－カーボン質、炭化ケイ素－アルミナ－カーボン質、または、アルミナ－カーボン－炭化ケイ素質の不定形耐火物の何れを用いたとしても、継ぎ足し面におけるスラグ付着面の面積率を５０％以下にすることで、継ぎ足し部の接着強度を向上できることが確認され、また、継ぎ足し面における水の付着量を０．０１０ｇ／ｃｍ２以上０．２５０ｇ／ｃｍ２以下にすることで、継ぎ足し部の接着強度を向上できることが確認された。これらの結果から、本実施形態に係る不定形耐火物の継ぎ足し施工方法がアルミナ－マグネシア質、アルミナ－スピネル質、アルミナ－マグネシア－カーボン質、アルミナ－スピネル－カーボン質、アルミナ－炭化ケイ素－カーボン質、アルミナ－ろう石－炭化ケイ素－カーボン質、炭化ケイ素－アルミナ－カーボン質、または、アルミナ－カーボン－炭化ケイ素質の不定形耐火物の何れにも適用できることが確認された。 As shown in Invention Examples 1-40 in Table 3, as an amorphous refractory, alumina-magnesia, alumina-spinel, alumina-magnesia-carbon, alumina-spinel-carbon, alumina-silicon carbide-carbon , Alumina-Frozen-Silicon Carbide-Carbonide, Silicon Carbide-Alumina-Carbonite, or Alumina-Carbon-Silicon Carbide Atypical Refractory Area It was confirmed that the adhesive strength of the replenished portion could be improved by setting the ratio to 50% or less, and by reducing the amount of water adhering to the replenished surface to 0.010 g / cm 2 or more and 0.250 g / cm 2 or less. It was confirmed that the adhesive strength of the replenished part could be improved. From these results, the method of adding the amorphous refractory according to the present embodiment is alumina-magnesia, alumina-spinel, alumina-magnesia-carbon, alumina-spinel-carbon, alumina-silicon carbide-carbon. , Alumina-Frozen-Silicon Carbide-Carbonite, Silicon Carbide-Alumina-Carbonite, or Alumina-Carbon-Silicon Carbide Atypical Refractory.
Claims (3)
継ぎ足し施工する不定形耐火物の継ぎ足し面におけるスラグが付着した付着面の面積率を５０％以下にした後に、前記継ぎ足し面に新たな不定形耐火物を継ぎ足し施工する、不定形耐火物の継ぎ足し施工方法。 It is a method of adding irregular refractories,
After reducing the area ratio of the adhering surface to which slag is attached to the replenishing surface of the amorphous refractory to be 50% or less, a new amorphous refractory is replenished to the replenishing surface. Method.
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