JP3505193B2 - Refractory - Google Patents
RefractoryInfo
- Publication number
- JP3505193B2 JP3505193B2 JP14890592A JP14890592A JP3505193B2 JP 3505193 B2 JP3505193 B2 JP 3505193B2 JP 14890592 A JP14890592 A JP 14890592A JP 14890592 A JP14890592 A JP 14890592A JP 3505193 B2 JP3505193 B2 JP 3505193B2
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- Japan
- Prior art keywords
- nozzle
- sio
- cao
- alumina
- weight
- 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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- Compositions Of Oxide Ceramics (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶融金属、例えば溶鋼を
収容し処理する窯炉、取鍋、タンディッシュ、真空脱ガ
ス装置およびノズル、浸漬管、等の溶鋼流通管、ストッ
パー等付帯設備に使用される耐火物に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace for accommodating and treating molten metal such as molten steel, a ladle, a tundish, a vacuum degassing device and nozzle, a molten steel flow pipe such as a dip pipe, and auxiliary equipment such as stoppers. It relates to refractories used.
【０００２】[0002]
【従来の技術】鋼の連続鋳造において浸漬ノズルは高温
で、モールドパウダーと接触するなど非常に過酷な条件
で使用されるため、耐食性に優れ、かつ機械的強度が優
れたノズル材質が要求される。これらの条件を具備した
ノズル材質として従来Ａｌ2 Ｏ3 −Ｃ質浸漬ノズルが広
く適用されてきた。しかしこのノズルは通過溶鋼量が多
くなるにつれ、ノズル内面にアルミナが付着成長して、
ノズル閉塞に至るため、操業トラブルの原因となり、連
々鋳回数増大の妨害要因となるばかりでなく、時にはノ
ズル内面に付着したアルミナが脱落することにより製品
欠陥の原因となることもある。2. Description of the Related Art In continuous casting of steel, an immersion nozzle is used under extremely severe conditions such as high temperature and contact with mold powder, so a nozzle material having excellent corrosion resistance and mechanical strength is required. . As a nozzle material satisfying these conditions, an Al 2 O 3 -C type immersion nozzle has been widely applied. However, as the amount of molten steel passing through this nozzle increased, alumina adhered and grew on the inner surface of the nozzle,
Since the nozzles become clogged, it may cause operational troubles and hinder the continuous increase in the number of castings, and sometimes alumina that adheres to the inner surface of the nozzle may fall off, resulting in product defects.
【０００３】一方、鋼材品質の厳格化に伴い、溶鋼清浄
性の確保は不可欠であり、これらを実現するためには耐
火物からの溶鋼汚染をできるだけ小さくすることが必要
である。この耐火物からの汚染は耐火物からの酸素の供
給による場合と、耐火物に付着・堆積したアルミナが溶
鋼中に脱落する場合があり、耐火物へのアルミナの付着
・堆積の防止が必要である。以上のごとく耐火物内面へ
のアルミナ付着防止対策の確立は重要課題で、従来から
多くの努力が払われてきた。しかし、特に大きな問題で
ある、浸漬ノズル内面に付着・堆積したアルミナに起因
したノズル閉塞は解決されたとは言い難い。この問題を
解決するため、最近ＣａＺｒＯ3 を含有した浸漬ノズル
用耐火材が開発され（特開昭６４−４０１５４号公
報）、適用されるに至っている。On the other hand, as the quality of steel materials becomes stricter, it is indispensable to secure the cleanliness of molten steel, and in order to realize these, it is necessary to minimize the contamination of molten steel from refractory materials. Contamination from this refractory may be due to the supply of oxygen from the refractory, or the alumina that has adhered to and deposited on the refractory may fall into the molten steel, so it is necessary to prevent the adhesion and deposition of alumina on the refractory. is there. As described above, establishing measures for preventing alumina from adhering to the inner surface of refractories is an important issue, and many efforts have been made in the past. However, it is difficult to say that the nozzle clogging due to the alumina adhered and deposited on the inner surface of the immersion nozzle, which is a particularly serious problem, has been solved. In order to solve this problem, a refractory material for immersion nozzles containing CaZrO 3 has recently been developed (Japanese Patent Laid-Open No. 64-40154) and has been applied.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ＣａＺ
ｒＯ3 を含有したノズルを用いても、閉塞防止効果が充
分発現しなかったり、ノズルの溶損が激しく鋳造を途中
で中断しなければならない場合があり、このノズル閉塞
防止効果を安定に、かつ効果的に発現することが、Ｃａ
ＺｒＯ3 含有ノズル使用のための大きな技術課題であ
る。またＣａＺｒＯ3 含有ノズルは安価な材質ではな
く、さらに安価な非付着材質の開発が重要課題である。
本発明者らはかかる課題を解決するため、ＣａＺｒＯ3
含有ノズルの付着防止機構を研究した結果本発明を提供
するに至った。[Problems to be Solved by the Invention] However, CaZ
Even if a nozzle containing rO 3 is used, the clogging prevention effect may not be sufficiently expressed, or the nozzle may be severely melted and casting may have to be interrupted in the middle of the process. Effective expression is Ca
This is a major technical problem for using a ZrO 3 -containing nozzle. Moreover, the CaZrO 3 containing nozzle is not an inexpensive material, and the development of an inexpensive non-adhesive material is an important issue.
In order to solve such a problem, the present inventors have proposed CaZrO 3
The present invention has been provided as a result of research on the adhesion prevention mechanism of the containing nozzle.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨とするとこ
ろは以下の通りである。
（１）ＣａＯとＳｉＯ2 の重量％の比が１．２〜２．０
（＝ＣａＯ／ＳｉＯ2 ）の範囲となるようＣａＯとＳｉ
Ｏ2 を含有し、耐火物全重量のうちＣａＯとＳｉＯ2 の
和が１０重量％以上、ＺｒＯ2 が５〜６０重量％、炭素
材が５〜３０重量％含有することを特徴とする耐火物。
（２）ＣａＯとＳｉＯ2 の重量％の比が１．２〜２．０
となるようＣａＯとＳｉＯ2 を含有し、ＣａＯ−ＳｉＯ
2 −Ａｌ2 Ｏ3 中にＡｌ2 Ｏ3 が４０重量％以下含有
し、耐火物全重量のうちＣａＯとＳｉＯ2 の和が１０重
量％以上、ＺｒＯ2 が５〜６０重量％、炭素材が５〜３
０重量％含有することを特徴とする耐火物にある。The gist of the present invention is as follows. (1) The ratio of CaO to SiO 2 weight% is 1.2 to 2.0.
CaO and Si to be in the range of (= CaO / SiO 2 ).
A refractory material containing O 2 , containing 10% by weight or more of CaO and SiO 2 in the total weight of the refractory material, 5 to 60% by weight of ZrO 2 , and 5 to 30% by weight of a carbon material. . (2) The weight ratio of CaO and SiO 2 is 1.2 to 2.0.
CaO and SiO 2 are contained so that
2- Al 2 O 3 contains 40 wt% or less of Al 2 O 3 , the sum of CaO and SiO 2 is 10 wt% or more, ZrO 2 is 5 to 60 wt%, and the carbon material is 5 to 3
It is a refractory characterized by containing 0% by weight.
【０００６】以下本発明をさらに細述する。本発明者等
は前記課題を解決するため、ＣａＺｒＯ3 を含有した浸
漬ノズルにおいて充分な閉塞防止効果があったと見られ
るノズルの付着実態を調査研究した結果、ノズル稼働面
近傍のノズル断面にはＣａＺｒＯ3 （３０％ＣａＯ含）
が分解して生成した、ＣａＯを１０％程度含有したＺｒ
Ｏ2 の固溶体と、これら粒間マトリックスにはＣａＺｒ
Ｏ3 （３０％ＣａＯ含）の分解により放出されたＣａＯ
と、溶鋼起源のＡｌ2Ｏ3および酸化防止材起源のＳｉＯ
2 によりＣａＯ−ＳｉＯ2−Ａｌ2Ｏ3系の酸化物相を構
成していることを明らかにした。The present invention will be described in more detail below. In order to solve the above-mentioned problems, the present inventors have investigated and studied the adhesion state of the nozzle which seems to have a sufficient blocking prevention effect in the immersion nozzle containing CaZrO 3, and as a result, CaZrO 3 (including 30% CaO)
Zr containing about 10% CaO generated by decomposition of
The solid solution of O 2 and CaZr are contained in these intergranular matrices.
CaO released by decomposition of O 3 (containing 30% CaO)
And Al 2 O 3 derived from molten steel and SiO derived from antioxidant
It revealed that constitutes the oxide phase of CaO-SiO 2 -Al 2 O 3 system by 2.
【０００７】さらに研究を進めた結果、ＣａＯ−ＳｉＯ
2 −Ａｌ2 Ｏ3 系酸化物は図２に示すごとくダイカルシ
ームシリケート（２ＣａＯ・ＳｉＯ2 、以下Ｃ2 Ｓと略
称）とゲーレナイト（２ＣａＯ・Ａｌ2 Ｏ3 ・Ｓｉ
Ｏ2 、以下Ｃ2 ＡＳと略称）およびこれらを直線で結ぶ
線上に位置する組成であることを解明し、Ｃ2 Ｓがノズ
ル内面へのＡｌ2 Ｏ3 の付着と堆積を防止し、ノズル形
成を維持するためのキー物質であることを知見して本発
明をなし遂げた。As a result of further research, CaO--SiO
As shown in FIG. 2, the 2- Al 2 O 3 -based oxide is composed of dical seam silicate (2CaO.SiO 2 , hereinafter abbreviated as C 2 S) and gehlenite (2CaO.Al 2 O 3 .Si).
O 2, C 2 AS abbreviated) and elucidated that these are compositions located on a line connecting a straight line, C 2 S is prevented deposition and adhesion of Al 2 O 3 to the nozzle inner surface below the nozzle formation The present invention has been accomplished by finding that it is a key substance for maintaining
【０００８】その原理について図３の擬２元系状態図に
基づき細述するとＣ2 ＳにＡｌ2 Ｏ3 が付着した場合、
図４に示すごとく、Ｃ2 ＳとＡｌ2 Ｏ3 の界面には液相
とＣ2 ＡＳを生成することになり、この低融点相がノズ
ル内面へのＡｌ2 Ｏ3 の付着、焼結を防止すると考えら
れる。The principle will be described in detail based on the quasi-binary phase diagram of FIG. 3. When Al 2 O 3 adheres to C 2 S,
As shown in FIG. 4, a liquid phase and C 2 AS are generated at the interface between C 2 S and Al 2 O 3 , and this low melting point phase causes the adhesion and sintering of Al 2 O 3 on the inner surface of the nozzle. Thought to prevent.
【０００９】 またＣ2 ＡＳ相は付着してしまったＡｌ
2 Ｏ3 をノズル内に収納する機能をはたし、図５に示す
ごとく付着したＡｌ2 Ｏ3 は、ノズルの中へ移動する。
以上の結果に基づくとＣ 2 Ｓを含有した浸漬ノズルの付
着防止反応は（１）式で、（１）式が実現できるＣａＯ
−ＳｉＯ2 −Ａｌ2 Ｏ3 の組成範囲は図６の斜線の範囲
となる。
Ｃ2 Ｓ（２ＣａＯ・ＳｉＯ2 ）＋Ａｌ2 Ｏ3 ＝Ｃ2 ＡＳ
（２ＣａＯ・Ａｌ2 Ｏ3 ・ＳｉＯ2 ）＋液相（図６の組
成Ａ，Ｂ） … （１）In addition, the C 2 AS phase has adhered to Al
It has a function of storing 2 O 3 in the nozzle, and Al 2 O 3 adhered as shown in FIG. 5 moves into the nozzle.
Based on the above results, the anti-adhesion reaction of the immersion nozzle containing C 2 S is represented by the formula (1), and CaO that can realize the formula (1)
The composition range of —SiO 2 —Al 2 O 3 is the range of the diagonal lines in FIG. C 2 S (2CaO · SiO 2 ) + Al 2 O 3 = C 2 AS
(2CaO · Al 2 O 3 · SiO 2 ) + liquid phase (compositions A and B in FIG. 6) (1)
【００１０】従ってＡｌ2 Ｏ3 の吸収により図６の斜線
の成分範囲にノズル組成が入るようノズルの初期成分を
調整することが重要で、ＣａＯとＳｉＯ 2 との総和が１
０重量％以上必要であり、ＣａＯとＳｉＯ2 の重量％の
比が１．２〜２．０（＝ＣａＯ／ＳｉＯ2 ）となるよう
調整することが必要である。Therefore, it is important to adjust the initial composition of the nozzle so that the composition of the nozzle falls within the range of the shaded components in FIG. 6 due to absorption of Al 2 O 3 , and the sum of CaO and SiO 2 is 1
0 wt% or more is required, and the ratio of CaO to SiO 2 is 1.2 to 2 % by weight . It is necessary to adjust to 0 (= CaO / SiO 2 ).
【００１１】また初期のＡｌ2Ｏ3含有量は少ないほど、
溶鋼からの吸収可能なＡｌ2 Ｏ3 量が増大するので好ま
しい。ノズル組成が図６に示した組成範囲にある場合、
鋼を鋳造する温度では、Ｃ2Ｓ は図３に示す如く固相で
存在するため、ノズルの溶損も防止され、Ｃ2Ｓ質系ノ
ズルは溶損、付着が非常に少ない。Also, the lower the initial Al 2 O 3 content,
This is preferable because the amount of Al 2 O 3 that can be absorbed from the molten steel increases. When the nozzle composition is within the composition range shown in FIG. 6,
At the temperature at which steel is cast, C 2 S exists in a solid phase as shown in FIG. 3, so that the melt loss of the nozzle is also prevented and the C 2 S type nozzle has very little melt loss and adhesion.
【００１２】なお浸漬ノズル内面へのアルミナの付着、
焼結、堆積を防止する機能はＣａＯとＳｉＯ2 の重量％
の比が１．２〜２．０に調整することにより実現できる
が、耐スポール性、溶損性の改善には炭素材および、Ｚ
ｒＯ2 粉末を必要に応じ含有させることが有効である。
以上発明によりアルミナの付着が非常に少なく、かつ溶
損しにくい耐火物が提供される。Adhesion of alumina to the inner surface of the immersion nozzle,
The function of preventing sintering and deposition is the weight percentage of CaO and SiO 2 .
Can be achieved by adjusting the ratio of 1.2 to 2.0, but in order to improve spall resistance and melting resistance, carbon material and Z
It is effective to add rO 2 powder as needed.
According to the invention as described above, a refractory having very little adherence of alumina and less likely to melt is provided.
【００１３】次に本発明を実施例により説明する。Next, the present invention will be described with reference to examples.
〔実施例１〕図７に示すごとく、１に示すアルミナグラ
ファイトの内面に、本発明耐火物２を内張りし試験を行
なった。本発明の内張り耐火物はＣ2 Ｓ−ＺｒＯ2 −Ｃ
質で、その成分構成割合はＺｒＯ2 が４５重量％、グラ
ファイトが２６重量％、ダイカルシームシリケート（Ｃ
2 Ｓ）が２９重量％である。本浸漬ノズルによって、低
炭素鋼を鋳造し吐出孔の付着厚とノズル通過溶鋼量との
関係をアルミナグラファイトノズルと比較して図８に示
す。本発明のＣ2 Ｓ−ＺｒＯ2−Ｃ質 ノズル材質のアル
ミナ付着厚はアルミナグラファイトノズルと比較して大
幅に改善できることが分かる。なお図７にはアルミナの
付着厚測定位置も示す。Example 1 As shown in FIG. 7, the refractory 2 of the present invention was lined on the inner surface of the alumina graphite 1 shown in FIG. Refractory lining of the present invention is C 2 S-ZrO 2 -C
Quality, the composition ratio of which is 45% by weight of ZrO 2 , 26% by weight of graphite, and Dical Seam Silicate (C
2 S) is 29% by weight. FIG. 8 shows the relationship between the deposit thickness of the discharge hole and the molten steel amount passing through the nozzle, which is obtained by casting low carbon steel with this immersion nozzle in comparison with the alumina graphite nozzle. Alumina deposition thickness of the C 2 S-ZrO 2 -C quality nozzle material of the present invention it can be seen that significantly improved as compared with the alumina graphite nozzle. Note that FIG. 7 also shows the position where the thickness of the deposited alumina is measured.
【００１４】〔実施例２〕実験方法は実施例１の場合と
同じである。内張りした耐火物組成はＣａＯとＳｉＯ2
の重量％の割合が１．７になるよう、ＣａＳｉＯ3，Ｃ
ａ3Ｓｉ2 Ｏ7 ，Ｃａ2ＳｉＯ4（Ｃ2Ｓ），Ｃａ3ＳｉＯ5
系の鉱物およびＳｉＯ2，ＣａＯにより調整した。さら
に耐火物全重量のうち炭素材が１０重量％、ＺｒＯ2 が
３０重量％となるよう配合して、あらかじめ１２００℃
６０分間の過熱処理を実施している。以上のごとく作成
したノズルにより、低炭素鋼を鋳造して吐出孔の付着厚
とノズル通過溶鋼量の関係をアルミナグラファイト質ノ
ズルと比較して図９に示す。本ノズル材質はアルミナ付
着厚の増大なしに多量の溶鋼を鋳造できることが分か
る。Example 2 The experimental method is the same as in Example 1. The refractory composition lined is CaO and SiO 2
Of CaSiO 3 and C such that the weight% ratio of
a 3 Si 2 O 7 , Ca 2 SiO 4 (C 2 S), Ca 3 SiO 5
It was adjusted by the minerals of the system and SiO 2 and CaO. Further, the carbon material and the ZrO 2 are blended so as to be 10% by weight and 30% by weight based on the total weight of the refractory, and the temperature is set to 1200 ° C.
Overheated for 60 minutes. FIG. 9 shows the relationship between the deposit thickness of discharge holes and the amount of molten steel passing through the nozzle by casting low carbon steel with the nozzle prepared as described above, in comparison with the alumina graphite nozzle. It can be seen that this nozzle material can cast a large amount of molten steel without increasing the alumina adhesion thickness.
【００１５】〔実施例３〕試験方法は実施例１の場合と
同じである。本実験では内張り耐火物のグラファイト量
を１０重量％、ＺｒＯ2 量を１０重量％に調整し、残り
のＣａＯ−ＳｉＯ2 成分のＣａＯとＳｉＯ2 の重量％の
割合を種々変更し、アルミナの付着および溶損状況を調
査した。結果を図１に示す。なおノズルを通過した溶鋼
量は１２００〜１４００ｔｏｎである。図１の結果によ
るとＣａＯとＳｉＯ2 の重量％の比が１．２（＝ＣａＯ
／ＳｉＯ2 ）より小さい場合、ノズルは溶損傾向とな
り、ＣａＯとＳｉＯ2 の重量％の比が２．０（＝ＣａＯ
／ＳｉＯ2 ）より大きい場合、ノズルはアルミナ付着傾
向となり、ＣａＯとＳｉＯ2 の重量％の割合が１．２〜
２．０の範囲でノズルはアルミナの付着も、溶損もない
ことを知見して本発明を成し遂げた。本発明によりアル
ミナ付着が少なく、溶損も少ない耐火材を提供するに至
った。Example 3 The test method is the same as in Example 1. In this experiment, the graphite amount of the lining refractory material was adjusted to 10% by weight and the ZrO 2 amount was adjusted to 10% by weight, and the ratio of the weight percentage of CaO and SiO 2 of the remaining CaO-SiO 2 components was variously changed to adhere alumina. And the erosion situation was investigated. The results are shown in Fig. 1. The amount of molten steel that has passed through the nozzle is 1200 to 1400 ton. According to the result of FIG. 1, the ratio of CaO to SiO 2 is 1.2 (= CaO).
/ SiO 2 ), the nozzle tends to melt and the weight ratio of CaO to SiO 2 is 2.0 (= CaO).
/ SiO 2 ), the nozzle tends to adhere to alumina, and the weight percentage of CaO and SiO 2 is 1.2-.
The present invention has been accomplished by finding that the nozzle has neither adhesion of alumina nor melting loss in the range of 2.0. The present invention has led to the provision of a refractory material with less alumina adhesion and less melting loss.
【００１６】〔実施例４〕実験方法は実施例１の場合と
同じである。ＺｒＯ2 の配合量と炭素量の配合量の割合
を調査した。ノズルを通過した溶鋼量は１２００〜１４
００ｔｏｎである。ＣａＯとＳｉＯ2の重量％の割合は
１．７（ＣａＯ／ＳｉＯ2）に調整した。アルミナ付着
厚に及ぼす炭素材配合割合の影響を図１０に示し、Ｚｒ
Ｏ2 配合割合の影響を図１１に示す。図１０の結果によ
ると炭素材を重量％で３０％以上含有した場合、ダイカ
ルシームシリケート（Ｃ2Ｓ） のアルミナ付着防止効果
は妨害され、アルミナの付着厚が増大する。また図１１
によるとＺｒＯ2 を重量％で６０％以上含有した場合、
ダイカルシームシリケート（Ｃ2Ｓ） のアルミナ付着防
止効果は妨害され、アルミナ付着厚が増大する。以上の
結果によるとダイカルシウムシリケートのアルミナ付着
防止効果を充分機能させるためには炭素材は３０重量％
以下、ＺｒＯ2は６０％以下の範囲に制限することが好
ましい。Example 4 The experimental method is the same as in Example 1. The ratio between the amount of ZrO 2 and the amount of carbon was investigated. The amount of molten steel passing through the nozzle is 1200-14
It is 00 tons. Weight percentage of CaO and SiO 2 was adjusted to 1.7 (CaO / SiO 2). Fig. 10 shows the effect of the carbon material blending ratio on the alumina adhesion thickness.
The effect of the O 2 compounding ratio is shown in FIG. 11. According to the result of FIG. 10, when the carbon material is contained in an amount of 30% by weight or more, the effect of preventing the adhesion of alumina of the diceal seam silicate (C 2 S) is hindered and the adhesion thickness of alumina increases. Also in FIG.
According to the above, when ZrO 2 is contained in an amount of 60% by weight or more,
The alumina adhesion preventive effect of the diceal seam silicate (C 2 S) is hindered and the alumina adhesion thickness is increased. According to the above results, the carbon material is 30% by weight in order to sufficiently function the effect of preventing the adhesion of alumina of dicalcium silicate.
Below, ZrO 2 is preferably limited to a range of 60% or less.
【００１７】[0017]
【発明の効果】以上のごとく、ダイカルシームシリケー
ト（Ｃ2 Ｓ）が生成するようＣａＯとＳｉＯ2 を重量比
が１．２〜２．０（＝ＣａＯ／ＳｉＯ2 ）となるよう配
合したＣ2 Ｓ−ＺｒＯ2 −Ｃ質耐火物によって窯炉や、
取鍋、タンディッシュ、あるいは真空脱ガス装置、流通
管等を構成することによって、耐火物表面へのＡｌ2 Ｏ
3 付着を防止し、溶鋼汚染を防止することができ、例え
ば本発明耐火物を鋼の連続鋳造ノズルに適用した場合、
該ノズルの閉塞を効果的に防止することができ、鉄鋼の
生産性向上と、鋳片品質の安定化が実現できる。As described above, C is prepared by mixing CaO and SiO 2 in a weight ratio of 1.2 to 2.0 (= CaO / SiO 2 ) so as to form a diceal seam silicate (C 2 S). 2 S-ZrO 2 -C quality refractory
By constructing a ladle, a tundish, a vacuum degassing device, a flow pipe, etc., Al 2 O on the surface of the refractory material
3 Prevents adhesion and can prevent molten steel contamination, for example, when the refractory of the present invention is applied to a steel continuous casting nozzle,
It is possible to effectively prevent clogging of the nozzle, improve productivity of steel, and stabilize slab quality.
【図１】浸漬ノズル内張り耐火物中のＣａＯとＳｉＯ2
の重量％比とアルミナ付着厚の関係Figure 1: CaO and SiO 2 in refractory lined with immersion nozzle
Between the weight% ratio of alumina and the adhesion thickness of alumina
【図２】ＣａＺｒＯ3 含有ノズルでアルミナ付着が防止
された場合のノズル内反応生成物質FIG. 2 Reaction product in nozzle when CaZrO 3 containing nozzle prevents adhesion of alumina
【図３】Ｃａ2ＳｉＯ4（Ｃ2Ｓ）とＣａ2Ａｌ2ＳｉＯ
7（Ｃ2ＡＳ）の疑似２元系状態図FIG. 3 Ca 2 SiO 4 (C 2 S) and Ca 2 Al 2 SiO
Pseudo binary system phase diagram of 7 (C 2 AS)
【図４】ダイカルシウムシリケート（Ｃ2Ｓ）含有ノズ
ルのアルミナ付着防止の原理FIG. 4 Principle of preventing alumina adhesion of nozzles containing dicalcium silicate (C 2 S)
【図５】ノズル内に吸収したアルミナ量FIG. 5: Alumina amount absorbed in the nozzle
【図６】ＣａＯ−ＳｉＯ2−Ａｌ2Ｏ3 系耐火物でダイカ
ルシームシリケート（Ｃ2 Ｓ）が生成する成分条件FIG. 6 is a component condition for forming a dical seam silicate (C 2 S) in a CaO—SiO 2 —Al 2 O 3 system refractory material.
【図７】実験を実施したノズル構成FIG. 7: Nozzle configuration for which experiment was conducted
【図８】本ノズル材質のアルミナ付着防止効果の例１FIG. 8 is an example 1 of the effect of preventing the adhesion of alumina by the material of this nozzle.
【図９】本ノズル材質のアルミナ付着防止効果の例２FIG. 9: Example 2 of alumina adhesion prevention effect of this nozzle material
【図１０】本ノズル材質のアルミナ付着防止効果に及ぼ
す炭素材配合割合の影響FIG. 10 Influence of carbon material blending ratio on the effect of preventing alumina adhesion of the nozzle material
【図１１】本ノズル材質のアルミナ付着防止効果に及ぼ
すＺｒＯ2配合割合の影響FIG. 11: Influence of ZrO 2 compounding ratio on the effect of alumina adhesion prevention of this nozzle material
１ アルミナグラファイト質 ２ 耐火物 ３ 付着アルミナ厚測定位置 1 Alumina graphite 2 refractories 3 Adhesive alumina thickness measurement position
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮沢 憲一 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 清瀬 明人 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 (56)参考文献 特開 平４−37453（ＪＰ，Ａ) 特開 昭63−45168（ＪＰ，Ａ) 特開 平２−207951（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kenichi Miyazawa 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Inside the Kimitsu Works (72) Inventor Akito Kiyose 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Inside the Kimitsu Works (56) Reference JP-A-4-37453 (JP, A) JP-A-63-45168 (JP, A) Japanese Patent Laid-Open No. 2-207951 (JP, A)
Claims (2)
〜２．０（＝ＣａＯ／ＳｉＯ2 ）の範囲となるようＣａ
ＯとＳｉＯ2 を含有し、耐火物全重量のうちＣａＯとＳ
ｉＯ2 の和が１０重量％以上、ＺｒＯ2 が５〜６０重量
％、炭素材が５〜３０重量％含有することを特徴とする
耐火物。1. The ratio by weight of CaO to SiO 2 is 1.2.
Ca in the range of up to 2.0 (= CaO / SiO 2 ).
Containing O and SiO 2 , CaO and S out of the total weight of the refractory
A refractory material containing 10% by weight or more of iO 2 , ZrO 2 in an amount of 5 to 60% by weight, and a carbon material in an amount of 5 to 30% by weight.
〜２．０となるようＣａＯとＳｉＯ2 を含有し、ＣａＯ
−ＳｉＯ2 −Ａｌ2 Ｏ3 中にＡｌ2 Ｏ3 が４０重量％以
下含有し、耐火物全重量のうちＣａＯとＳｉＯ2 の和が
１０重量％以上、ＺｒＯ2 が５〜６０重量％、炭素材が
５〜３０重量％含有することを特徴とする耐火物。2. The ratio by weight of CaO and SiO 2 is 1.2.
CaO and SiO 2 are contained so that
-SiO 2 -Al 2 O 3 Al 2 O 3 in the containing 40 wt% or less, of the refractories total weight CaO and the sum of SiO 2 is 10 wt% or more, ZrO 2 is 5-60 wt%, carbon The material is
A refractory material containing 5 to 30% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14890592A JP3505193B2 (en) | 1992-05-18 | 1992-05-18 | Refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14890592A JP3505193B2 (en) | 1992-05-18 | 1992-05-18 | Refractory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05319900A JPH05319900A (en) | 1993-12-03 |
| JP3505193B2 true JP3505193B2 (en) | 2004-03-08 |
Family
ID=15463295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14890592A Expired - Fee Related JP3505193B2 (en) | 1992-05-18 | 1992-05-18 | Refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3505193B2 (en) |
-
1992
- 1992-05-18 JP JP14890592A patent/JP3505193B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05319900A (en) | 1993-12-03 |
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