JPH02221165A - Monolithic refractory for molten steel ladle bed part - Google Patents
Monolithic refractory for molten steel ladle bed partInfo
- Publication number
- JPH02221165A JPH02221165A JP1041620A JP4162089A JPH02221165A JP H02221165 A JPH02221165 A JP H02221165A JP 1041620 A JP1041620 A JP 1041620A JP 4162089 A JP4162089 A JP 4162089A JP H02221165 A JPH02221165 A JP H02221165A
- Authority
- JP
- Japan
- Prior art keywords
- clinker
- spinel
- alumina
- lining
- molten steel
- 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
- 239000011823 monolithic refractory Substances 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 title claims description 16
- 239000010959 steel Substances 0.000 title claims description 16
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 49
- 239000011029 spinel Substances 0.000 claims abstract description 49
- 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 22
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract description 4
- -1 bauxite Natural products 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- 229910001570 bauxite Inorganic materials 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 229930014626 natural product Natural products 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 description 16
- 239000002893 slag Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 11
- 239000011449 brick Substances 0.000 description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000035515 penetration Effects 0.000 description 6
- 230000035699 permeability Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052845 zircon Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910019582 Cr V Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052851 sillimanite Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 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） 本願発明は、溶鋼取鍋敷部用不定形耐火物に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a monolithic refractory for a molten steel ladle base.
（従来の技術）
溶鋼用取鍋の内張りは、施工の省力化・機械化などを目
的として、従来の煉瓦積みから不定形耐火物による施工
に移行されつつある。(Prior Art) For the purpose of labor saving and mechanization of construction, the lining of ladle for molten steel is being shifted from conventional brick masonry to monolithic refractories.
ここで使用される不定形耐火物として、例えば、特開昭
６０−６０９８５号公報には、スピネルクリンカ−を少
なくとも６０重量部、アルミナクリンカー１０〜３５重
量部、アルミナセメント３〜１０重量部とからなるスピ
ネル−アルミナ質、特開昭６０−６０９８６号公報には
マグネシアクリンカー：アルミナクリンカーの重量比が
７：３〜８：２からなる混合物を６０〜８０重量部とス
ピネルクリンカ−２０〜４０重量部とからなる骨材を有
したマグネシア−アルミナ−スピネル質が提案されてい
る。As the monolithic refractory used here, for example, JP-A-60-60985 discloses that at least 60 parts by weight of spinel clinker, 10 to 35 parts by weight of alumina clinker, and 3 to 10 parts by weight of alumina cement are used. JP-A No. 60-60986 discloses a spinel-alumina material containing 60-80 parts by weight of a mixture of magnesia clinker and alumina clinker in a weight ratio of 7:3-8:2 and spinel clinker - 20-40 parts by weight. A magnesia-alumina-spinel material with an aggregate consisting of is proposed.
これらは従来のろう石質、ろう石−ジルコン質などの不
定形耐火物に比べて耐食性および耐久ポーリング性に優
れている。These refractories are superior in corrosion resistance and durable poling properties compared to conventional monolithic refractories such as waxite and waxite-zircon.
（発明が解決しようとする課題）
溶鋼用取鍋の内張りに不定形耐火物が使用されるように
なったが、実際には側壁部に限られ、敷部（底部）は従
来どおり煉瓦積みで行われている。(Problem to be solved by the invention) Monolithic refractories have come to be used for the lining of ladle for molten steel, but in reality it is limited to the side walls, and the lining (bottom) is made of brick as before. It is being done.
近年、不定形耐火物の性能が向上したとはいえ、煉瓦に
比べるとまだ信頼性に欠け、不定形耐火物による敷部の
内張りは渦漏れ事故が懸念されるからである。Although the performance of monolithic refractories has improved in recent years, they are still less reliable than bricks, and there are concerns about vortex leakage accidents when lining the floor with monolithic refractories.
しかし、そのために取鍋内張りの完全不定形化が阻まれ
、内張り施工の省力化・機械化が十分達成されていない
。また、煉瓦積みは時間を要するため、取鍋の稼＃Ｊ率
を低下させている。However, this has prevented the ladle lining from becoming completely amorphous, and labor-saving and mechanization of lining construction have not been sufficiently achieved. Also, since bricklaying takes time, it reduces the ladle production rate.
（課題を解決するための手段）
本発明者らは、敷部の内張りとして使用可能な不定形耐
火物の研究を重ねてきた。その結果、アルミナ−スピネ
ル質のキャスタブル耐火物において、ＭｇＯ・ＡＱ、０
３系スピネルクリンカ−（以下、単にスピネルクリンカ
−と称す） を粒径１＋ｍ以下で使用すると共にアルミ
ナクリンカーとスピネルクリンカ−の割合を特定の範囲
に限定すると耐食性および耐久ラグ浸透性が格段に優れ
ることを知った。(Means for Solving the Problems) The present inventors have repeatedly conducted research on monolithic refractories that can be used as linings for flooring sections. As a result, in alumina-spinel castable refractories, MgO・AQ, 0
When a 3-series spinel clinker (hereinafter simply referred to as spinel clinker) is used with a particle size of 1+m or less and the ratio of alumina clinker and spinel clinker is limited to a specific range, corrosion resistance and durable lag penetration are significantly superior. I learned.
側壁の内張りは上方へ熱膨張の逃げ代があるが。The lining of the side walls has an upward escape allowance for thermal expansion.
外周が拘束される敷部は熱膨張が迫り応力となって、従
来の煉瓦積みでは目地の損傷あるいは中央部の迫り出し
を招き、溶損が促進される。これに対し前記キャスタブ
ル耐火物を使用すると、一体構造であるため目地溶損が
なく、しかも迫り応力をそれ自身で吸収するために中央
部の迫り出しがまったく認められなかった。Thermal expansion creates stress in the paving section where the outer periphery is constrained, causing damage to the joints or protrusion of the central portion in conventional brickwork, which accelerates melting. On the other hand, when the castable refractory was used, there was no joint melting because of the integral structure, and no protrusion at the center was observed because it absorbed the protrusion stress by itself.
また、敷部を前記キャスタブル耐火物で内張すすると、
スラグの粘性が増し、側壁の内張りの耐用寿命を向上さ
せることもわかった。In addition, if the bed is lined with the castable refractory material,
It was also found that the viscosity of the slag increases, improving the service life of the sidewall lining.
本発明は、以上の結果にもとづいて完成するに至ったも
のであり、その特徴とするところは、重量割合において
、アルミナクリンカー３５〜９０％、粒径ＩＩＩＩｌ以
下のスピネルクリンカ−３〜３５％および結合剤１〜３
０％を主材としてなる溶鋼取鍋敷部用不定形耐火物であ
る。The present invention has been completed based on the above results, and its characteristics include, in weight proportions, 35 to 90% alumina clinker, 3 to 35% spinel clinker with a particle size of III or less, and Binding agent 1-3
This is a monolithic refractory for the base of a molten steel ladle, which is mainly composed of 0%.
以下、本発明をさらに詳しく説明する。なお、以下に示
す％は、すべて重量％とする。The present invention will be explained in more detail below. Note that all percentages shown below are percentages by weight.
本発明のキャスタブル耐火物について説明すると、主骨
材の一つであるアルミナクリンカーは、耐食性および容
積安定性の役割をもつ。具体的な種類としては焼結アル
ミナ、電融アルミナなどの人工品、ばん土頁岩、ボーキ
サイト、シリマナイトなどの天然品から選ばれる一種ま
たは二種以上を使用することができる。なかでも、低融
点物質の生成原因となりやすいＳｉＯ２成分が少ないも
のが好ましい。その粒度は密充填組織が得られるよう、
一般のキャスタブル耐火物と同様に、例えば最大粒子径
３〜３０ｍｍ程度とし、粗粒・中粒・微粒に調整する。Explaining the castable refractory of the present invention, alumina clinker, which is one of the main aggregates, has the role of corrosion resistance and volume stability. Specifically, one or more types selected from artificial products such as sintered alumina and fused alumina, and natural products such as clay shale, bauxite, and sillimanite can be used. Among these, those containing less SiO2 component, which tends to cause the formation of low melting point substances, are preferable. The particle size is adjusted to obtain a densely packed structure.
As with general castable refractories, the maximum particle diameter is, for example, about 3 to 30 mm, and adjusted to coarse, medium, or fine particles.
このアルミナクリンカーの割合は３５％未満では耐食性
に劣り、９０％を超えるとその分、後述するスピネルク
リンカ−１結合剤などの割合が少なくなって耐久ラグ浸
透性、強度などに劣る。さらに好ましい範囲％−！４５
〜８０％である。If the proportion of this alumina clinker is less than 35%, the corrosion resistance will be poor, and if it exceeds 90%, the proportion of the spinel clinker-1 binder, which will be described later, will be reduced accordingly, resulting in poor durability lag permeability, strength, etc. More preferable range %-! 45
~80%.
主として耐スラグ浸透性に効果をもつスピネルクリンカ
−は、電融スピネル、焼結スピネルのいずれか、または
その両者の組み合せで使用する。The spinel clinker, which is mainly effective in slag penetration resistance, is used in the form of fused spinel, sintered spinel, or a combination of both.
この場合、スピネルを構成するＭｇＯ・ＡＱ、Ｏ，の各
成分の比は必ずしも理論組織のものでなくてもよい。例
えば、モル比でＭｇＯ・＾Ｑ２０．が０．７〜１．３：
１．３〜０．７の範囲であればよい。In this case, the ratio of each component of MgO, AQ, and O constituting the spinel does not necessarily have to be that of the theoretical structure. For example, MgO・^Q20. is 0.7 to 1.3:
It may be within the range of 1.3 to 0.7.
スピネルクリンカ−は粒径１ｎｖｍ以下のものを３〜５
５％使用する。第１図はアルミナ−スピネル質キャスタ
ブル耐火物において、スピネルクリンカ−の最大粒子径
と耐火物のスラグ浸透性との関係を示したグラフである
。この場合の各原料の配合割合は、焼結アルミナクリン
カー７０％、焼結スピネルクリンカ−２０％、アルミナ
セメント１０％とした。測定方法は、実験室において回
転侵食試験で行った。The spinel clinker has a particle size of 1 nvm or less.
Use 5%. FIG. 1 is a graph showing the relationship between the maximum particle diameter of spinel clinker and the slag permeability of the refractory in an alumina-spinel castable refractory. The mixing ratio of each raw material in this case was 70% sintered alumina clinker, 20% sintered spinel clinker, and 10% alumina cement. The measurement method was a rotational erosion test in a laboratory.
第１図のとおり、１＋ｍ以下のスピネルクリンカ−を使
用したものが耐スラブ性に優れている。この傾向はスピ
ネルクリンカ−が微粒であればあるほど強く、０．５ｍ
以下ではさらに顕著である。As shown in FIG. 1, those using spinel clinker of 1+m or less have excellent slab resistance. This tendency is stronger as the spinel clinker becomes finer, and 0.5 m
It is even more noticeable below.
その理由は、スピネルクリンカ−が微粒であることで、
マトリックスに隙間なく充填される結果、スラグ成分の
Ｆｅｄ、 ＭｎＯなどをスピネルクリンカ−が確実に固
溶し、スラブの浸透を阻止するものと思われる。これに
対し１粒径の大きなスピネルクリンカ−は使用すると、
スピネルクリンカ−同士の隙間が大きくなるから、スラ
グはその間を通って浸透するものと考えられる。The reason is that the spinel clinker is fine particles.
As a result of filling the matrix without gaps, the spinel clinker reliably dissolves the slag components, such as Fed and MnO, and prevents them from penetrating the slab. On the other hand, when using a spinel clinker with a large grain size,
Since the gaps between the spinel clinkers become larger, it is thought that the slag penetrates through them.
なお、本発明では粒径がｌｎ＋＋を超えるスピネルクリ
ンカ−を全く使用できないというものではない。ＩＩ以
下を本発明に限定した３〜５５％配合していれば、後述
の実施例のとおり、本発明の範囲で１＋ｍを超える粒径
のスピネルクリンカ−を配合してもよい。In addition, the present invention does not mean that spinel linkers having a particle size exceeding ln++ cannot be used at all. As long as 3 to 55% of the spinel clinkers below II are blended within the scope of the present invention, spinel clinker having a particle size exceeding 1+m may be blended within the scope of the present invention, as shown in the Examples below.
スピネルクリンカ−の粒子径を０ 、５ ｎｏ以下、１
ｍｍ以下、１〜５ＩｌＩＩの三種とし、他の条件は第１
図と同様にしたキャスタブル耐火物Ａ、Ｂ、Ｃを２５０
を溶鋼取鍋の敷部に内張すし、使用後、スラグ成分のＦ
ｅｄ、 ＭｎＯのそれぞれについて浸透寸法を測定した
結果を第２図のグラフに示す。微粒のスピネルクリンカ
−を使用したの、■は浸透がほとんど稼動面付近に限ら
れ、内部に浸透していない。The particle size of spinel clinker is 0, 5 no or less, 1
mm or less, 1 to 5IlII, and other conditions are 1st
250 castable refractories A, B, and C made in the same manner as shown in the figure.
Line the bottom of the molten steel ladle with F of the slag component after use.
The graph in FIG. 2 shows the results of measuring the penetration dimensions of MnO and MnO. When fine-grained spinel clinker was used, the penetration was mostly limited to the vicinity of the operating surface and did not penetrate into the interior.
第３図は、焼結アルミナクリンカー、焼結スピネルクリ
ンカ−、アルミナセメント］、Ｏ％のキャスタブル耐火
物について、焼結スピネルクリンカ−を１ｍ以下と０．
５ ｎｕ以下の２種類に分けて使用すると共に、この割
合を変化させた場合のスラグ浸透寸法を示したものであ
る。この結果からも明らかなように、スピネルクリンカ
−の割合が、３〜５５％で良好な結果を示し、さらに好
ましくは５〜４０％である。Figure 3 shows sintered spinel clinker, sintered spinel clinker, alumina cement], 0% castable refractories, and sintered spinel clinker of 1 m or less and 0%.
The figure shows the slag penetration dimensions when the slag is divided into two types of 5 nu or less and the ratio is changed. As is clear from this result, good results are obtained when the spinel clinker content is 3 to 55%, more preferably 5 to 40%.
第１図〜第３図のグラフに示す以上の結果は、焼結スピ
ネル、電融スピネルを問わず見られる傾向である。The results shown in the graphs of FIGS. 1 to 3 are a tendency that can be observed regardless of whether the spinel is sintered or fused.
第２図、第３図は、実際に溶鋼用取鍋の敷部に内張すし
て得られた結果である。本発明者らは同じキャスタブル
耐火物材質を溶鋼用取鍋の側壁に内張すしたところ、結
果は第２図、第３図のものと異っていた。これは敷部が
迫り応力と共に大きな熱負荷を受けることで焼結が促進
され、しかもスラグとの接触が少ないことで、側壁部に
比べてスラグが浸透されにくいためと思われる。Figures 2 and 3 show the results obtained by actually lining the bottom of a ladle for molten steel. When the present inventors lined the side wall of a ladle for molten steel with the same castable refractory material, the results were different from those in FIGS. 2 and 3. This seems to be because sintering is promoted by the bed section being subjected to pressure and a large thermal load, and because there is little contact with the slag, it is difficult for the slag to penetrate compared to the side wall section.
本発明で使用される結合剤の種類は特に限定されるもの
ではない、アルミナセメントが最も好ましいが、これに
限らず、例えばリン酸塩、珪酸塩、フェノール樹脂など
でもよい。その割合は１％未満では効果がなく、３０％
を超えると気孔率が大きくなって耐食性に劣る。さらに
好ましい範囲は２〜２０％である。The type of binder used in the present invention is not particularly limited, and is most preferably alumina cement, but is not limited thereto, and may also be, for example, phosphates, silicates, phenol resins, etc. If the percentage is less than 1%, it is ineffective, and 30%
If it exceeds this, the porosity will increase and the corrosion resistance will be poor. A more preferable range is 2 to 20%.
本発明のキャスタブル耐火物は、金属ファイバーを添加
すると、熱膨張応力を長期にわたって小さく保つことが
でる。第４図は、ステンレスファイバー無添加量と添加
品の拘束下の熱膨張応力曲線を示したものである。ここ
で使用される金属ファイバーの材質はステンレス鋼が最
も好ましいが。When metal fibers are added to the castable refractory of the present invention, thermal expansion stress can be kept low for a long period of time. FIG. 4 shows the thermal expansion stress curves of the unadded stainless fiber and the additive under restraint. The most preferable material for the metal fiber used here is stainless steel.
これに限らず１例えば鉄、炭素鋼、Ｎｉ −Ｃｒ鋼、Ｃ
ｒ−Ｍｏ鋼、Ｃｒｆｉ、Ｃｒ−Ｖ＆ｌｉ、ＡＱ、ＡＱ金
合金Ｃｕ、Ｃｕ合金などでもよい。形状はストレー１−
形、曲線、山形、波形などのいずれでもよい。寸法は、
直径０．１〜２ｍ、長さは直径の５〜５０倍程度（例え
ば５〜４０■）が好ましい。For example, iron, carbon steel, Ni-Cr steel, C
r-Mo steel, Crfi, Cr-V&li, AQ, AQ gold alloy Cu, Cu alloy, etc. may also be used. The shape is Stray 1-
It can be any shape, curve, chevron, waveform, etc. The dimensions are
The diameter is preferably 0.1 to 2 m, and the length is preferably about 5 to 50 times the diameter (for example, 5 to 40 cm).
金属ファイバーの割合は７％以下の範囲で、各ファイバ
ーの比重などに合せて適宜決定する。ごく少ない割合で
も効果が認められるが、金属ファイバーは低融点物質で
もあるから、７％を超えるとキャスタブル耐火物の耐食
性を低下させる。さらに好ましい範囲は０．０５〜５％
である。The proportion of metal fibers is within a range of 7% or less, and is appropriately determined depending on the specific gravity of each fiber. Although the effect is recognized even with a very small proportion, since metal fiber is also a low melting point substance, if it exceeds 7%, the corrosion resistance of the castable refractory will be reduced. A more preferable range is 0.05 to 5%.
It is.
本発明キャスタブル耐火物は以上の配合物を主材とする
が、必要に応じ、キャスタブル耐火物の添加物として公
知の、例えば、スピネルクリンカ−およびアルミナクリ
ンカー以外の耐火原料、セラミックスファイバー、有機
質ファイバー、鉱物ファイバー、鉱滓ファイバー、金属
粉、ガラス粉、炭素、炭化物、窒化物、硼化物、解膠剤
、硬化剤、耐火物超微粉、シリカフラワーなどを本発明
の効果を阻害しない範囲で添加してもよい。The castable refractories of the present invention are mainly composed of the above-mentioned compounds, but if necessary, known additives for castable refractories, such as refractory raw materials other than spinel clinker and alumina clinker, ceramic fibers, organic fibers, etc. Mineral fibers, slag fibers, metal powders, glass powders, carbon, carbides, nitrides, borides, peptizers, hardening agents, ultrafine refractory powder, silica flour, etc. may be added to the extent that they do not impede the effects of the present invention. Good too.
つぎに敷部への内張り施工について説明すると、側壁の
内張りに行われているのと同様に、パーマネント内張り
としてまず煉瓦を敷き詰めた後、その上にキャスタブル
耐火物を内張すするのが好ましい。Next, explaining the construction of lining the flooring, it is preferable to first lay bricks as a permanent lining, and then line the castable refractories on top, similar to what is done for the lining of side walls.
パーマネント煉瓦の材質は限定されるものではなく、例
えば、ろう石質、ろう石−ジルコン質などである６また
、パーマネント内張りとして不定形耐火物を用いてもよ
い。溶鋼用取鍋を使用後。The material of the permanent brick is not limited, and may be, for example, waxite, waxite-zircon, etc. 6 Also, a monolithic refractory may be used as the permanent lining. After using a ladle for molten steel.
敷部を再度内張りする際は、このパーマネント内張りを
残し、キャスタブル耐火物部分のみを取り換えればよい
。When relining the lining, leave this permanent lining in place and replace only the castable refractory section.
キャスタブル耐火物の施工は、水分を外掛けで３〜１５
％程度添加し、混線後、敷部に流し込み、バイブレータ
−などによって充填させる。When installing castable refractories, remove moisture from the outside to 3 to 15%.
After mixing the wires, pour it into the bed and fill it with a vibrator or the like.
取鍋が受湯する際の溶鋼落下点は、敷部の中でも特に場
当たり部と称され、他の部位にに比べ損傷が著しい。そ
こで本発明は、この場当たり部のみを高耐食性の他の材
質で内張すしてもよい。その例として、敷部を金属ファ
イバーを添加したキャスタブル耐火物を使用した場合は
、場当たり部のみを金属ファイバーを添加しないか、ま
たは金属ファイバーの割合を他の部位より少なくしたキ
ャスタブル耐火物で内張すする。The point where the molten steel falls when the ladle receives the molten metal is called the spot section, which is particularly prone to damage compared to other sections. Therefore, in the present invention, only this contact portion may be lined with another highly corrosion-resistant material. For example, if a castable refractory with metal fiber added is used for the lining, only the temporary part is lined with castable refractory with no metal fiber added or with a lower proportion of metal fiber than other parts. Slurp.
耐火物組織内で金属ファイバーの存在は耐火物の焼結を
阻害する作用をもつから、金属ファイバーを添加しない
か少なくすると焼結が促進され、場当たり部として好ま
しい緻密質の材質となるからである。The presence of metal fibers in the refractory structure has the effect of inhibiting the sintering of the refractory, so if the metal fibers are not added or are reduced, sintering will be promoted, resulting in a dense material that is preferable as a contact area. .
また、場当たり部のみを煉瓦積みにし、場当たり部の耐
用性を向上させてもよい。Alternatively, only the temporary portion may be made of brick to improve the durability of the temporary portion.
本発明で使用するアルミナ−スピネル質キャスタブル耐
火物は、微粒のスピネルクリンカ−を特定の割合で配合
したことで、耐スラブ性が格段に向上する。また、その
スピネルクリンカ−の割合を低く押えているために熱膨
張応力が小さく、外周が拘束されるという敷部の内張り
において、従来みられた膨張による迫り出しという問題
もない。The alumina-spinel castable refractory used in the present invention has significantly improved slab resistance by blending fine spinel clinker in a specific ratio. In addition, since the proportion of spinel clinker is kept low, thermal expansion stress is small, and there is no problem of protrusion due to expansion, which was conventionally seen in the lining of the lining where the outer periphery is constrained.
以上の作用によって耐用寿命に優れた敷部の内張りが得
られるが、同時に側壁の内張りの寿命を向上させる効果
がある。これは、従来、敷部の内張りに使用されていた
ろう石質・ろう石−ジルコン質の煉瓦より生じるスラグ
成分に比べ、アルミナ−スピネル質キャスタブル耐火物
からのスラブ成分の方が粘性が高く、スラブによる側壁
の溶損作用が小さいからと思われる。Due to the above-described effects, it is possible to obtain a floor lining having an excellent service life, and at the same time, it has the effect of improving the life of the side wall lining. This is because the slab component made from alumina-spinel castable refractories has a higher viscosity than the slag component produced from the waxite and waxite-zircon bricks that were conventionally used for the lining of the slab. This is thought to be due to the fact that the erosion effect on the side walls is small.
前記のアルミナ−スピネル質キャスタブル耐火物に金属
ファイバーを添加すると、長期使用しでも熱膨張応力を
小さい状態で保つことができる。When metal fibers are added to the alumina-spinel castable refractory described above, thermal expansion stress can be kept small even after long-term use.
キャスタブル耐火物は使用中の高熱を受けて焼結が進む
と熱膨張応力の大きな材質となるが、金属ファイバーは
耐火粒子同士の接触をさえぎり、キャスタブル耐火物の
焼結を阻止するためと思われる。Castable refractories become a material with large thermal expansion stress as they undergo sintering due to high heat during use, but this seems to be because metal fibers block contact between refractory particles and prevent castable refractories from sintering. .
（実施例） 第１表、第２表に本発明実施例とその比較例を示す。(Example) Tables 1 and 2 show examples of the present invention and comparative examples thereof.
表中、本発明実施例と比較例１〜７はキャスタブル耐火
物、比較例８は加圧成形後、１３００℃で焼成した煉瓦
である。In the table, Examples of the present invention and Comparative Examples 1 to 7 are castable refractories, and Comparative Example 8 is a brick baked at 1300° C. after pressure molding.
試験において、熱間膨張応力および曲げ強さは、いずれ
も試験片を小型加熱電気炉内で測定したが、他の試験は
実際に２５０を溶鋼取鍋の敷部に内張すして使用した結
果である。In the tests, hot expansion stress and bending strength were both measured using test pieces in a small heating electric furnace, but in other tests, 250 was actually used as a lining in the bottom of a molten steel ladle. It is.
比較例８は煉瓦。Comparative Example 8 is brick.
（発明の効果）
本発明によると、敷部の内張りとして使用したキャスタ
ブル耐火物が耐久ラグ浸透性に優れ、しかも熱膨張応力
が小さく、その結果、敷部の寿命が格段に向上する。ま
た、敷部にキャスタブル耐火物を使用したことで、溶鋼
用取鍋の内張りの完全不定形耐火物化が可能となり、内
張り施工の機械化・省力化に大きく貢献する。(Effects of the Invention) According to the present invention, the castable refractory used as the lining of the lining has excellent permeability to durable rugs and low thermal expansion stress, and as a result, the life of the lining is significantly improved. In addition, by using castable refractories for the lining, it is possible to completely line the molten steel ladle with monolithic refractories, greatly contributing to the mechanization and labor-saving of lining construction.
さらに、本発明で敷部に使用するキャスタブル耐火物が
アルミナ−スピネル質であることおよび耐食性に優れて
いることによって、側壁部の内張りの寿命も向上させる
効果がある。Furthermore, since the castable refractory used for the lining in the present invention is alumina-spinel and has excellent corrosion resistance, it has the effect of improving the life of the lining of the side wall.
第１図は、スピネルクリンカ−の粒径と耐久ラグ浸透性
との関係を示すグラフ、第２図（１）、（２）は実炉使
用結果（スラブの浸透調査）を示すグラフ、第３図はス
ピネルクリンカ−の配合割合と耐久ラグ浸透性の関係を
示すグラフ、第４図は拘束第１図
スビオルクリン力−の最犬辛立径（ｍｍ）第３図
スピネルク！ルカーの配合１１１合（ｗｔ％）第２図
稼動面からの距離（ｍｍ）
稼動面からの距：ｌｌ［ｔ （ｍｍ ）第４図
シ旬朱下の無膨脹几・力曲線
足度（“Ｃ）Figure 1 is a graph showing the relationship between spinel clinker particle size and durable lag permeability, Figure 2 (1) and (2) are graphs showing the results of actual furnace use (slab penetration investigation), and Figure 3 The figure is a graph showing the relationship between the blending ratio of spinel clinker and the permeability of the durable lag. Figure 4 is the restraint figure 1. Subiorclin force - the maximum diameter (mm) of spinel clinker. Figure 3 is spinel clinker! Formula 111 (wt%) Figure 2 Distance from the operating surface (mm) Distance from the operating surface: ll[t (mm) Figure 4 C)
Claims (2)
０％、粒度１ｍｍ以下のＭｇＯ・Ａｌ＿２Ｏ＿３系スピ
ネルクリンカー３〜５５％および結合剤１〜３０％を主
材としてなる溶鋼取鍋敷部用不定形耐火物。(1) Alumina clinker 35 to 9 in weight proportion
A monolithic refractory for use in a molten steel ladle base, which is mainly composed of 3 to 55% MgO.Al_2O_3 spinel clinker with a grain size of 1 mm or less and 1 to 30% of a binder.
０％、粒径１ｍｍ以下のＭｇＯ・Ａｌ＿２Ｏ＿３系スピ
ネルクリンカー３〜５５％、金属ファイバー７％以下お
よび結合剤１〜３０％を主材としてなる溶鋼取鍋敷部用
不定形耐火物。(2) Alumina clinker 35 to 9 in weight proportion
A monolithic refractory for use in a molten steel ladle bottom, the main materials being 3 to 55% MgO.Al_2O_3 spinel clinker with a grain size of 1 mm or less, 7% or less of metal fibers, and 1 to 30% of a binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041620A JPH0637334B2 (en) | 1989-02-23 | 1989-02-23 | Castable refractory for molten steel ladle floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041620A JPH0637334B2 (en) | 1989-02-23 | 1989-02-23 | Castable refractory for molten steel ladle floor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02221165A true JPH02221165A (en) | 1990-09-04 |
| JPH0637334B2 JPH0637334B2 (en) | 1994-05-18 |
Family
ID=12613381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1041620A Expired - Lifetime JPH0637334B2 (en) | 1989-02-23 | 1989-02-23 | Castable refractory for molten steel ladle floor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637334B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992018440A1 (en) * | 1991-04-16 | 1992-10-29 | Shinagawa Refractories Co., Ltd. | Unshaped alumina spinel refractory |
| JP2011032118A (en) * | 2009-07-31 | 2011-02-17 | Shin-Nippon Thermal Ceramics Corp | COATING MATERIAL WITH FeO RESISTANCE |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363414A (en) * | 1976-11-19 | 1978-06-06 | Nippon Kokan Kk | Basic indefinite form refractories for pouring ladle lining |
| JPS59128271A (en) * | 1982-12-29 | 1984-07-24 | 株式会社神戸製鋼所 | Flow in material for molten iron desilicating launder |
| JPS59232973A (en) * | 1983-06-13 | 1984-12-27 | ハリマセラミック株式会社 | Castable refractories for molten metal treating lance |
| JPS61117168A (en) * | 1984-10-09 | 1986-06-04 | ザ・ダウ・ケミカル・カンパニ− | Refractory composition |
-
1989
- 1989-02-23 JP JP1041620A patent/JPH0637334B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363414A (en) * | 1976-11-19 | 1978-06-06 | Nippon Kokan Kk | Basic indefinite form refractories for pouring ladle lining |
| JPS59128271A (en) * | 1982-12-29 | 1984-07-24 | 株式会社神戸製鋼所 | Flow in material for molten iron desilicating launder |
| JPS59232973A (en) * | 1983-06-13 | 1984-12-27 | ハリマセラミック株式会社 | Castable refractories for molten metal treating lance |
| JPS61117168A (en) * | 1984-10-09 | 1986-06-04 | ザ・ダウ・ケミカル・カンパニ− | Refractory composition |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992018440A1 (en) * | 1991-04-16 | 1992-10-29 | Shinagawa Refractories Co., Ltd. | Unshaped alumina spinel refractory |
| US5316571A (en) * | 1991-04-16 | 1994-05-31 | Shinagawa Refractories Co., Ltd. | Alumina-spinel type monolithic refractories |
| JP2011032118A (en) * | 2009-07-31 | 2011-02-17 | Shin-Nippon Thermal Ceramics Corp | COATING MATERIAL WITH FeO RESISTANCE |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0637334B2 (en) | 1994-05-18 |
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