JPH0656523A - Refractory material - Google Patents

Refractory material

Info

Publication number
JPH0656523A
JPH0656523A JP4208271A JP20827192A JPH0656523A JP H0656523 A JPH0656523 A JP H0656523A JP 4208271 A JP4208271 A JP 4208271A JP 20827192 A JP20827192 A JP 20827192A JP H0656523 A JPH0656523 A JP H0656523A
Authority
JP
Japan
Prior art keywords
cao
weight
nozzle
molten steel
sio
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.)
Pending
Application number
JP4208271A
Other languages
Japanese (ja)
Inventor
Yoshiharu Iizuka
祥治 飯塚
Takashi Hiromatsu
隆 廣松
Mitsuo Uchimura
光雄 内村
Yasuhiro Yamada
泰宏 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurosaki Refractories Co Ltd
Nippon Steel Corp
Original Assignee
Kurosaki Refractories Co Ltd
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kurosaki Refractories Co Ltd, Nippon Steel Corp filed Critical Kurosaki Refractories Co Ltd
Priority to JP4208271A priority Critical patent/JPH0656523A/en
Publication of JPH0656523A publication Critical patent/JPH0656523A/en
Pending legal-status Critical Current

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  • Compositions Of Oxide Ceramics (AREA)

Abstract

PURPOSE:To provide a means for sufficiently exhibiting the compounding effect of SiO2 by preventing elution of the SiO2 as an impurity into a molten steel at the time of adding the SiO2 as a material for accelerating the formation of a low melting material into the molten steel when CaO is incorporated in combination with ZrO2 into the molten steel as a material for constituting a molten steel treating member, such as nozzle member for continuous casting. CONSTITUTION:This refractory material consists of a compd. contg. 60 to 80wt.% CaO-ZrO2 aggregate contg. 5 to 35wt.% CaO component and 65 to 95wt.% ZrO2 component, 1 to 30wt.% mixture and/or compd. composed of CaO2 and SiO2 and 10 to 35wt.% carbon material. In addition, the grain size constitution of the compd. exclusive of the carbon material is so specified that the particles of >=200mum diameter are <=1wt.% and the particles of <=10mum diameter are <=5wt.%. The decomposition of the CaO-ZrO2 is generated before operation by using the refractory aggregate which is previously mixed with the compounding compsns. and is subjected to a heat treatment at the time of compounding the refractory aggregate.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、溶鋼を搬送処理する窯
炉,取鍋,タンディッシュ,真空脱ガス装置,ノズル
類,浸漬管,ストッパー等の溶鋼処理用部材として好適
な耐火材に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory material suitable as a member for treating molten steel, such as a kiln, a ladle, a tundish, a vacuum degassing device, nozzles, dipping pipes and stoppers for conveying molten steel.

【0002】[0002]

【従来の技術】鋼の連続鋳造用ノズルとして、取鍋とタ
ンディッシュとの間を連通するためのロングノズル,タ
ンディッシュとモールドとの間を連通するためのタンデ
ィッシュノズルや浸漬ノズルがある。
2. Description of the Related Art As nozzles for continuous casting of steel, there are a long nozzle for communicating between a ladle and a tundish, a tundish nozzle for dipping between a tundish and a mold, and a dipping nozzle.

【0003】この中で、とくに長尺のロングノズルや浸
漬ノズルは、耐スポーリング性,耐摩耗性,耐食性に対
する要求が厳しく、この要求を満足させるものとして、
現在ではアルミナ−シリカ−黒鉛質や、アルミナ−黒鉛
質,ジルコニア−黒鉛質の耐火材製のものが使用されて
いる。
Among these, particularly long long nozzles and dipping nozzles have strict requirements for spalling resistance, wear resistance and corrosion resistance, and are required to satisfy these requirements.
Currently, alumina-silica-graphite, alumina-graphite, and zirconia-graphite refractory materials are used.

【0004】上記の要求特性は、それ自体が高強度で高
耐食性であるアルミナやジルコニアの骨材粒と、耐スポ
ーリング性に優れたシリカ粒や黒鉛を組合せることによ
ってノズルに要求される耐スポーリング性、耐摩耗性、
耐食性等の性質を満足させているものである。
The above-mentioned required characteristics are required for the nozzle by combining aggregate particles of alumina or zirconia, which have high strength and high corrosion resistance, with silica particles or graphite having excellent spalling resistance. Spalling, wear resistance,
It satisfies the properties such as corrosion resistance.

【0005】ところが、アルミニウムを含有する溶鋼の
処理にこの種の耐火材からなるノズルを使用すると、鋼
中のアルミニウムの酸化によって生成するアルミナがノ
ズルの表面に析出し、これが堆積してノズル孔の流路を
塞いでしまう、いわゆるノズル閉塞が起こり易い。ま
た、不純物の少ない高清浄鋼の処理に使用する場合には
ノズルを構成する耐火材中のアルミナ,シリカ等が溶鋼
に不純物として溶出して好ましくない。
However, when a nozzle made of a refractory material of this kind is used for treating molten steel containing aluminum, alumina produced by the oxidation of aluminum in the steel is deposited on the surface of the nozzle, and this is deposited to form nozzle holes. So-called nozzle blockage, which blocks the flow path, easily occurs. Further, when used for the treatment of highly clean steel containing a small amount of impurities, alumina, silica, etc. in the refractory material forming the nozzle elutes into the molten steel as impurities, which is not preferable.

【0006】かかる問題に対して、特開昭57−718
60号公報においては、ノズルを構成する耐火材中にC
aOを含有させることにより、優れたノズル閉塞防止効
果が得られることが開示されている。
To solve this problem, Japanese Patent Laid-Open No. 57-718
In Japanese Patent Laid-Open No. 60, in the refractory material forming the nozzle, C
It is disclosed that by containing aO, an excellent effect of preventing nozzle clogging can be obtained.

【0007】このCaOによる優れたノズル閉塞防止効
果は次のようにして奏せられるものと考えられる。
It is considered that the excellent effect of preventing nozzle clogging by CaO can be achieved as follows.

【0008】すなわち、CaOとAl2 3 との複合化
合物の液相生成温度は、鋼の凝固温度より相当に低く、
ノズル孔内の溶鋼と接触する中では低融物として存在す
るので、析出し堆積することがない。また、CaOを含
有する非金属介在物は溶鋼の中で容易に浮上し、鋼の中
に不純物として取り込まれることが少ない。このため、
CaOを含有するノズル耐火物の表面では、Al2 3
が析出,堆積することなく、CaO−Al2 3 化合物
として溶鋼中に溶解浮上して鋼の中に不純物として残存
することが少ない。
That is, the liquidus formation temperature of the composite compound of CaO and Al 2 O 3 is considerably lower than the solidification temperature of steel,
Since it exists as a low-melt material in contact with the molten steel in the nozzle hole, it does not precipitate and deposit. Further, the non-metallic inclusions containing CaO easily float in the molten steel and are rarely taken into the steel as impurities. For this reason,
On the surface of the nozzle refractory containing CaO, Al 2 O 3
However, it rarely remains as an impurity in the steel by being dissolved and floated in the molten steel as a CaO-Al 2 O 3 compound without being precipitated or deposited.

【0009】しかしながら、CaOを含有した際には、
耐火材自体の熱膨張が大きくなり、また、水分と反応す
る消化性がある等の欠点がある。
However, when CaO is contained,
The refractory material itself has a large thermal expansion, and has the drawback that it has a digestibility to react with moisture.

【0010】このCaOを含有したことによる欠点は、
CaOをZrO2 との複合化合物であるCaZrO
3 (カルシウムジルコネート)の形で配合することによ
って低熱膨張率とし、さらに周期律表のIII 族、及びIV
族の酸化物を0.5〜5重量%添加することにより消化
性を低減できることが、特公平2−23494号公報に
開示されている。
The disadvantages of containing CaO are
CaZrO which is a compound compound of CaO and ZrO 2.
3 (calcium zirconate) is added to obtain a low coefficient of thermal expansion, and the addition of Group III and IV of the periodic table
JP-B-2-23494 discloses that digestibility can be reduced by adding 0.5 to 5% by weight of a group oxide.

【0011】しかし、CaOをCaZrO3 の形で含有
したノズルを使用した場合には、融点の低いCaO−A
2 3 化合物を生成する反応が不充分となり、ノズル
閉塞防止効果が充分に発揮されない場合がある。
However, when a nozzle containing CaO in the form of CaZrO 3 is used, CaO-A having a low melting point is used.
In some cases, the reaction for producing the l 2 O 3 compound becomes insufficient, and the effect of preventing nozzle clogging cannot be fully exhibited.

【0012】このCaZrO3 の含有による問題の原因
を調査する過程で、ノズルの稼動面にCaO−SiO2
−Al2 3 系の低融点物質が形成されている場合には
ノズル孔閉塞防止効果が十分に発揮されることがわかっ
た。これは、CaZrO3 がZrO2 とCaOに分解
し、さらに、鋼中の介在物であるAl2 3 と、同じく
鋼中の介在物であり、また、ノズル構成材である耐火材
中の微量不純物であるSiO2 が集合した結果と思われ
る。
In the process of investigating the cause of the problem caused by the inclusion of CaZrO 3 , the operating surface of the nozzle is covered with CaO--SiO 2
It was found that the effect of preventing clogging of the nozzle holes was sufficiently exhibited when the -Al 2 O 3 -based low melting point substance was formed. This is because CaZrO 3 decomposes into ZrO 2 and CaO, and also Al 2 O 3 which is an inclusion in the steel and an inclusion in the steel as well as a trace amount in the refractory material which is a nozzle constituent material. It seems that SiO 2 which is an impurity is aggregated.

【0013】このことは、特開平2−207951号公
報に記載されているSiO2 がCaZrO3 の分解を促
進するという事項からも、CaZrO3 の配合の場合の
低融点物質の生成によるノズル孔閉塞防止には、ノズル
形成材中へのSiO2 の添加配合が効果的であることが
わかる。
This is because the fact that SiO 2 promotes the decomposition of CaZrO 3 as described in Japanese Patent Laid-Open No. 2-207951 suggests that the nozzle holes are clogged due to the formation of a low melting point substance when CaZrO 3 is blended. It can be seen that the addition of SiO 2 in the nozzle forming material is effective for prevention.

【0014】しかしながら、SiO2 はノズルの加熱に
よってガス化してノズル外に揮散すれば、上記の低融点
物質を生成する反応にも寄与しないために、ノズル閉塞
に対しても不利となると共に、これが溶鋼中に溶解し、
溶鋼に対して有害不純物であるSiとO(酸素)を供給
する原因となってしまうという欠点がある。
However, if SiO 2 is gasified by heating the nozzle and volatilizes out of the nozzle, it does not contribute to the reaction for producing the above-mentioned low-melting point substance, which is disadvantageous for clogging of the nozzle and this is also a problem. Melts in molten steel,
There is a drawback that it causes the supply of harmful impurities Si and O (oxygen) to the molten steel.

【0015】このように、低融点化合物による閉塞防止
効果を発揮させるためのCaOと、CaOの配合による
消化と熱膨張増大の欠点を低減するためのZrO2 とを
組み合わせた耐火材へのSiO2 添加には功罪がある。
As described above, SiO 2 for a refractory material in which CaO for exhibiting the effect of preventing clogging by the low-melting-point compound and ZrO 2 for reducing the defects of digestion and increase in thermal expansion due to the incorporation of CaO are combined. There are merits and demerits in addition.

【0016】一方、かかるノズルに使用される耐火材の
骨材粒子の粒度構成に及ぼす影響については、従来から
種々知られており、例えば、特開平4−37451号公
報によれば、最大径を200μmに規制すればノズルの
組織が緻密化し、高強度になることが知られている。ま
た、特開平3−170367号公報には、最大径が10
μm以下の骨材粒子の含有量を一定量以下にすることに
よって耐スポーリング性が向上することも記載されてい
る。
On the other hand, various influences of the refractory material used for such a nozzle on the particle size constitution of the aggregate particles have been conventionally known. For example, according to JP-A-4-37451, the maximum diameter is It is known that the structure of the nozzle is densified and the strength is increased by controlling the thickness to 200 μm. Further, in Japanese Patent Laid-Open No. 3-170367, the maximum diameter is 10
It is also described that the spalling resistance is improved by setting the content of the aggregate particles of μm or less to a certain amount or less.

【0017】[0017]

【発明が解決しようとする課題】本発明の目的は、連続
鋳造用ノズル材のような溶鋼処理部材構成材として、C
aOとZrO2 とを組み合わせ含有せしめる際の低融点
物質生成促進材としてSiO2 を添加するに当たって、
SiO2 の溶鋼中への不純物としての溶出を防止してS
iO2 の配合の効果を十分に発揮させるための手段を見
出すことにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a C steel as a molten steel treated member constituting material such as a nozzle material for continuous casting.
In adding SiO 2 as a low-melting-point substance generation accelerator when aO and ZrO 2 are contained in combination,
Prevents the elution of SiO 2 as an impurity in molten steel and S
The purpose is to find a means for sufficiently exerting the effect of blending iO 2 .

【0018】[0018]

【課題を解決するための手段】本発明の耐火材は、Ca
O成分を5〜35重量%とZrO2 成分を65〜95重
量%を含有するCaO−ZrO2 骨材を60〜80重量
%と、CaOとSiO2 との混合物及び又は化合物を1
〜30重量%と、炭素材10〜35重量%とを含有した
配合物からなり、かつ、炭素材を除く配合物の粒度構成
が200μm以上径の粒子が1重量%以下で、10μm
以下径の粒子が5重量%以下としたことによって上記の
目的を達成した。
The refractory material of the present invention is Ca
60 to 80% by weight of CaO-ZrO 2 aggregate containing 5 to 35% by weight of O component and 65 to 95% by weight of ZrO 2 component, and 1 and a mixture and / or compound of CaO and SiO 2.
˜30% by weight and a carbon material 10 to 35% by weight, and the composition excluding the carbon material has a particle size composition of 200 μm or more and particles having a diameter of 1% by weight or less and 10 μm.
The above object was achieved by making the particles having the following diameters 5% by weight or less.

【0019】また、上記の耐火材の調製に際して、Ca
O成分を5〜35重量%とZrO2成分を65〜95重
量%を含有するCaO−ZrO2 化合物を60〜80重
量%と、CaOとSiO2 との混合物及び又は化合物を
1〜30重量%とを含有した配合物を、あらかじめ混合
し、熱処理したものを使用することができる。
When preparing the above refractory material, Ca
O component is 5 to 35% by weight, ZrO 2 component is 65 to 95% by weight, and CaO-ZrO 2 compound is 60 to 80% by weight, and a mixture of CaO and SiO 2 and / or compound is 1 to 30% by weight. A mixture containing and can be used after being pre-mixed and heat-treated.

【0020】CaO−ZrO2 骨材は、通常CaZrO
3 の複合化合物の形で配合され、CaOとSiO2 との
混合物及び又は化合物は、CaOとSiO2 との混合物
で、あるいは単一の化合物の形で配合され、ノズルに含
有する場合の化学組成は、ノズルの使用条件を基に任意
に調整できる。
The CaO-ZrO 2 aggregate is usually CaZrO 2.
Chemical composition when mixed in the form of a complex compound of 3 , the mixture of CaO and SiO 2 and / or the compound is a mixture of CaO and SiO 2 or in the form of a single compound and contained in the nozzle. Can be arbitrarily adjusted based on the usage conditions of the nozzle.

【0021】本発明による耐火材の具体的な構成として
は、連続鋳造用の浸漬ノズルを例にとると、以下のよう
なものがある。
Specific examples of the refractory material according to the present invention are as follows, taking an immersion nozzle for continuous casting as an example.

【0022】CaO−ZrO2 骨材としてはCaO成分
を5〜35重量%と、ZrO2 成分を65〜95重量%
を含有し、不純物は10%程度以下が望ましい。電融
法,焼結法等で製造された原料が使用できる。CaO−
SiO2 系の混合物あるいは化合物としては、SiO2
として石英,クリストバライト,トリディマイト,非晶
質シリカ等の単体又は混合物が、CaOとしてはCa
O,Ca(OH)2 ,CaCO3 等が、化合物としては
CaSiO3 ,Ca3 Si2 7 ,Ca2 SiO4,C
3 SiO5 等が使用できる。またこれらはCaZrO
3 と予め混合,熱処理したものでもよい。炭素材として
は鱗状黒鉛,土状黒鉛,カーボンブラック,ピッチ類,
有機高分子類が使用できる。
As the CaO-ZrO 2 aggregate, the CaO component is 5 to 35% by weight and the ZrO 2 component is 65 to 95% by weight.
It is desirable that the content of impurities be 10% or less. Raw materials produced by the electrofusion method, the sintering method, etc. can be used. CaO-
As the SiO 2 -based mixture or compound, SiO 2
As a simple substance or a mixture of quartz, cristobalite, tridymite, amorphous silica, etc., as CaO,
O, Ca (OH) 2 , CaCO 3, etc. are compounds such as CaSiO 3 , Ca 3 Si 2 O 7 , Ca 2 SiO 4 , C
a 3 SiO 5 or the like can be used. In addition, these are CaZrO
It may be mixed with 3 and heat treated in advance. Carbon materials include scaly graphite, earthy graphite, carbon black, pitches,
Organic polymers can be used.

【0023】また、これら以外にZrO2 ,Al
2 3 ,MgO等の酸化物、SiC,BN,B4 C,Z
rB2 ,AlN,CaF2 ,NaF,AlF3 等の非酸
化物、Si,Al,Mg等の金属類を必要に応じて添加
できる。バインダーとしては、ピッチ類,フェノール
類、フラン樹脂、PVA等の有機質バインダーや、粘
土,水ガラス等の無機質バインダーを使用する。
In addition to these, ZrO 2 , Al
2 O 3 , oxides such as MgO, SiC, BN, B 4 C, Z
Non-oxides such as rB 2 , AlN, CaF 2 , NaF and AlF 3 and metals such as Si, Al and Mg can be added as required. As the binder, organic binders such as pitches, phenols, furan resins and PVA, and inorganic binders such as clay and water glass are used.

【0024】炭素材を除く原料骨材の粒度構成は、20
0μm以上が1重量%以下、10μm以下が5重量%以
下になるようにすれば通気率が低下し、耐スポーリング
性も適当となるが、望ましくは200μm以上が1重量
%以下、100μm超200μm未満が30±5重量
%、50μm超100μm未満が30±5重量%、10
μm超50μm未満が40±5重量%、10μm以下が
5重量%以下にすることが充填性を向上することに効果
がある。
The particle size composition of the raw material aggregate excluding the carbon material is 20
If 0 μm or more is 1% by weight or less and 10 μm or less is 5% by weight or less, the air permeability is lowered, and the spalling resistance is appropriate, but 200 μm or more is 1% by weight or less, more than 100 μm and 200 μm Less than 30 ± 5% by weight, more than 50 μm less than 100 μm 30 ± 5% by weight, 10
It is effective that the content of more than 50 μm and less than 50 μm is 40 ± 5 wt%, and that of 10 μm or less is 5 wt% or less, the filling property is improved.

【0025】本発明に用いるCaO成分を5〜35重量
%含有するCaZrO3 原料の成分範囲については、C
aOが5重量%未満ではアルミナ付着防止に効果がな
く、35重量%を超えると耐食性に劣る。また、該原料
の配合量については60重量%未満では耐食性が劣り、
80重量%を超えると耐スポーリング性が低下するた
め、60〜80重量%が望ましい。
The composition range of the CaZrO 3 raw material containing 5 to 35% by weight of the CaO component used in the present invention is C
If the content of aO is less than 5% by weight, there is no effect in preventing the adhesion of alumina, and if it exceeds 35% by weight, the corrosion resistance is poor. When the amount of the raw material is less than 60% by weight, the corrosion resistance is poor,
If it exceeds 80% by weight, spalling resistance is lowered, so 60 to 80% by weight is desirable.

【0026】CaO−SiO2 系の混合物あるいは化合
物の配合量については、1重量%未満では低融物の生成
効果がなく、30重量%を超えると耐食性に劣るため、
1〜30重量%が望ましい。
With respect to the amount of the CaO-SiO 2 mixture or compound to be added, if the amount is less than 1% by weight, the effect of forming a low melt is not obtained, and if it exceeds 30% by weight, the corrosion resistance is poor.
1 to 30% by weight is desirable.

【0027】[0027]

【作用】本発明は、上記構成によって耐スポーリング性
を損なわずに通気性を低下させることができ、SiO2
のガス化反応を抑制できる。
According to the present invention, the above structure can reduce the air permeability without impairing the spalling resistance, and the SiO 2
The gasification reaction of can be suppressed.

【0028】CaO−SiO2 系の混合物あるいは化合
物をノズルに配合すると、CaO−ZrO2 化合物であ
るCaZrO3 の分解が促進されて、分解生成物が溶鋼
中のAl2 3 と反応してCaO−SiO2 −Al2
3 系の低融点物質を生成してノズル閉塞の防止効果があ
る。また、配合原料骨材の粒度構成を適正化することに
より、ノズル構成材料の通気性を低下させることによっ
てSiO2 の溶鋼への溶解が低減する。
When a CaO-SiO 2 mixture or compound is blended in the nozzle, the decomposition of CaZrO 3 which is a CaO-ZrO 2 compound is promoted, and the decomposition product reacts with Al 2 O 3 in the molten steel to cause CaO. -SiO 2 -Al 2 O
It has the effect of preventing nozzle clogging by producing a low melting point substance of 3 types. Further, by optimizing the particle size composition of the compounded raw material aggregate, the air permeability of the nozzle constituent material is lowered, and the dissolution of SiO 2 into the molten steel is reduced.

【0029】CaZrO3 は高温下ではCaO−SiO
2 系化合物と反応し易く、ZrO2とCaO−SiO2
系の低融点物質を生成しやすい。この低融物は、溶鋼を
起源とするAl2 3 と反応し、低融物として溶鋼中に
溶け込み、ノズル閉塞防止に効果を発揮する。
CaZrO 3 is CaO-SiO at high temperature.
Easily reacts with 2 compounds, ZrO 2 and CaO-SiO 2
It is easy to form low melting point substances in the system. This low melt reacts with Al 2 O 3 originating from the molten steel, melts into the molten steel as a low melt, and exerts an effect of preventing nozzle clogging.

【0030】一般にノズル耐火物は使用する前に100
0〜1400℃に予熱されるので、CaZrO3 がCa
O−SiO2 系混合物あるいは化合物と反応しZrO2
とCaO−SiO2 系の低融点物質を生成する反応がノ
ズル表層部で起こり、この低融物と溶鋼起源のAl2
3 との反応が起こり易くなる。しかし、予熱温度が適正
でない場合はこのような反応の進行が不充分となり、A
2 3 付着が発生する懸念がある。この場合は予めC
aZrO3 とCaO−SiO2 系混合物あるいは化合物
とを事前に混合,熱処理し低融点物質を生成させておけ
ば、予熱温度が不充分であってもAl2 3 との反応が
起こり易くなるため、生成物の付着が防止され、ノズル
に適用した場合のノズル孔の閉塞を効果的に防止でき
る。
Generally, the nozzle refractory is 100
Since it is preheated to 0 to 1400 ° C, CaZrO 3 is Ca
ZrO 2 by reacting with O-SiO 2 mixture or compound
And a reaction to form a CaO—SiO 2 system low melting point substance occur in the nozzle surface layer portion, and this low melting point and Al 2 O originating from molten steel
Reaction with 3 is likely to occur. However, if the preheating temperature is not appropriate, the progress of such a reaction will be insufficient and A
There is a concern that l 2 O 3 may adhere. In this case C
If a low melting point substance is formed by previously mixing aZrO 3 and a CaO-SiO 2 based mixture or compound and heat-treating them, the reaction with Al 2 O 3 is likely to occur even if the preheating temperature is insufficient. Further, the adhesion of the product is prevented, and the clogging of the nozzle hole when applied to the nozzle can be effectively prevented.

【0031】[0031]

【実施例】本発明の耐火材で形成した連続鋳造用の浸漬
ノズルを連続鋳造用設備に適用して効果を確認した。
Example The effect was confirmed by applying the immersion nozzle for continuous casting formed of the refractory material of the present invention to continuous casting equipment.

【0032】試料ノズルの組成(重量%)と使用後のA
2 3 付着厚みを表1及び表2に示す。
Composition of sample nozzle (% by weight) and A after use
The 1 2 O 3 adhesion thickness is shown in Tables 1 and 2.

【0033】[0033]

【表1】 [Table 1]

【表2】 表1及び表2において、比較例1〜7は配合物の組成が
規定外のもの、比較例8〜10は原料骨材の粒度構成が
規定外のもので、比較例11は比較のためのAl2 3
−C質で構成される従来の浸漬ノズルである。
[Table 2] In Tables 1 and 2, Comparative Examples 1 to 7 have compositions that are not specified, Comparative Examples 8 to 10 have particle sizes of raw material aggregates that are not specified, and Comparative Example 11 is for comparison. Al 2 O 3
-It is the conventional immersion nozzle comprised by C quality.

【0034】これらの試料ノズルを容量60tタンディ
ッシュの浸漬ノズルとして実炉使用に供し、低炭キルド
鋼5連鋳の条件の下で試験した。この結果、従来材質の
比較例11は、1チャージで閉塞した。本発明に対して
配合組成又は骨材の粒度構成が異なる比較例1〜3及び
6〜10はAl2 3 付着厚みが4.2〜4.8mm/
チャージとなり、本発明によるノズルに比較してAl2
3 付着厚みが厚い。
These sample nozzles were used as an immersion nozzle having a capacity of 60 t for a tundish in an actual furnace and tested under the conditions of continuous casting of low carbon killed steel. As a result, Comparative Example 11 of the conventional material was blocked by one charge. Comparative Examples 1 to 3 and 6 to 10 which differ from the present invention in the compounding composition or the grain size composition of the aggregate have an Al 2 O 3 adhesion thickness of 4.2 to 4.8 mm /
It becomes charged, and compared with the nozzle according to the present invention, Al 2
The thickness of O 3 adhered is large.

【0035】また、比較例4,5は、ノズル閉塞を生じ
た。
Further, in Comparative Examples 4 and 5, nozzle clogging occurred.

【0036】本発明の実施例1〜5は、いずれもAl2
3 の付着が少なく、ノズル閉塞防止に対して優れた効
果を発揮した。
In each of Examples 1 to 5 of the present invention, Al 2
The adhesion of O 3 was small, and it exhibited an excellent effect in preventing nozzle clogging.

【0037】[0037]

【発明の効果】本発明によって以下の効果を奏する。The present invention has the following effects.

【0038】(1)処理溶鋼を汚染することなく、アル
ミニウムを含有する鋼であっても、アルミナの付着の少
ない耐火材である。
(1) Treated Molten steel is a refractory material that does not contaminate molten steel and has little alumina adhesion even if it contains aluminum.

【0039】(2)連続鋳造用のロングノズル、浸漬ノ
ズルに適用しても、ノズル孔を閉塞する恐れがなく、長
寿命下での稼働が可能となり、設備稼働効率が上がる。
(2) Even when it is applied to a long nozzle or a dipping nozzle for continuous casting, there is no fear of blocking the nozzle hole, operation is possible with a long life, and the equipment operation efficiency is improved.

【0040】(3)連続鋳造用のロングノズル,浸漬ノ
ズルとして必要とされる耐スポーリング性を備えてお
り、使用中の亀裂発生もなく、操業の安全性が確保さ
れ、設備稼働効率も上がる。
(3) It has spalling resistance required for continuous casting long nozzles and immersion nozzles, no cracks occur during use, operational safety is secured, and equipment operating efficiency is increased. .

───────────────────────────────────────────────────── フロントページの続き (72)発明者 内村 光雄 千葉県君津市君津1番地 新日本製鐵株式 会社君津製鐵所内 (72)発明者 山田 泰宏 千葉県富津市新富20−1 新日本製鐵株式 会社技術開発本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Uchimura 1 Kimitsu, Kimitsu-shi, Chiba Shin Nippon Steel Co., Ltd. Kimitsu Steel Co., Ltd. (72) Inventor Yasuhiro Yamada 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Stock Company Technology Development Division

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 CaO成分を5〜35重量%とZrO2
成分を65〜95重量%を含有するCaO−ZrO2
材を60〜80重量%と、CaOとSiO2との混合物
及び又は化合物を1〜30重量%と、炭素材10〜35
重量%とを含有した配合物からなり、かつ、炭素材を除
く配合物の粒度構成が200μm以上径の粒子が1重量
%以下で、10μm以下径の粒子が5重量%以下とした
耐火材。
1. A CaO component of 5 to 35% by weight and ZrO 2
60 to 80% by weight of CaO—ZrO 2 aggregate containing 65 to 95% by weight of components, 1 to 30% by weight of a mixture and / or compound of CaO and SiO 2, and 10 to 35 of carbonaceous material.
A refractory material consisting of a composition containing 1% by weight of particles having a particle size of 200 μm or more and 1% by weight or less and particles having a diameter of 10 μm or less of 5% by weight or less.
【請求項2】 CaO成分を5〜35重量%とZrO2
成分を65〜95重量%を含有するCaO−ZrO2
材を60〜80重量%と、CaOとSiO2との混合物
及び又は化合物を1〜30重量%と、炭素材10〜35
重量%とを含有した配合物からなり、かつ、炭素材を除
く配合物があらかじめ混合し、熱処理したものであり、
さらに、炭素材を除く配合物が粒度構成が200μm以
上径の粒子が1重量%以下で、10μm以下径の粒子が
5重量%以下とした耐火材。
2. A CaO component of 5 to 35% by weight and ZrO 2
60 to 80% by weight of CaO—ZrO 2 aggregate containing 65 to 95% by weight of components, 1 to 30% by weight of a mixture and / or compound of CaO and SiO 2, and 10 to 35 of carbonaceous material.
And a composition excluding the carbonaceous material is premixed and heat treated,
Further, the composition excluding the carbon material has a particle size composition of 1% by weight or less for particles having a diameter of 200 μm or more and 5% by weight or less for particles having a diameter of 10 μm or less.
JP4208271A 1992-08-04 1992-08-04 Refractory material Pending JPH0656523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4208271A JPH0656523A (en) 1992-08-04 1992-08-04 Refractory material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4208271A JPH0656523A (en) 1992-08-04 1992-08-04 Refractory material

Publications (1)

Publication Number Publication Date
JPH0656523A true JPH0656523A (en) 1994-03-01

Family

ID=16553483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4208271A Pending JPH0656523A (en) 1992-08-04 1992-08-04 Refractory material

Country Status (1)

Country Link
JP (1) JPH0656523A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021085325A1 (en) * 2019-10-31 2021-05-06 黒崎播磨株式会社 CaO-ZrO2 COMPOSITION, METHOD FOR PRODUCING CaO-ZrO2 COMPOSITION, AND CaO-ZrO2-CONTAINING REFRACTORY MATERIAL AND CASTING NOZZLE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021085325A1 (en) * 2019-10-31 2021-05-06 黒崎播磨株式会社 CaO-ZrO2 COMPOSITION, METHOD FOR PRODUCING CaO-ZrO2 COMPOSITION, AND CaO-ZrO2-CONTAINING REFRACTORY MATERIAL AND CASTING NOZZLE
JP2021070048A (en) * 2019-10-31 2021-05-06 黒崎播磨株式会社 CaO-ZrO2 COMPOSITION, METHOD OF PRODUCING CaO-ZrO2 COMPOSITION, CaO-ZrO2 CONTAINED REFRACTORY, AND CASTING NOZZLE
CN114514212A (en) * 2019-10-31 2022-05-17 黑崎播磨株式会社 CaO-ZrO2Composition, CaO-ZrO2Method for producing composition, CaO-ZrO-containing composition2Refractory and casting nozzle
CN114514212B (en) * 2019-10-31 2023-02-28 黑崎播磨株式会社 CaO-ZrO 2 Composition, caO-ZrO 2 Method for producing composition, caO-ZrO-containing composition 2 Refractory and casting nozzle

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