JPH089499B2 - Fired magnesia dolomite brick - Google Patents
Fired magnesia dolomite brickInfo
- Publication number
- JPH089499B2 JPH089499B2 JP4336706A JP33670692A JPH089499B2 JP H089499 B2 JPH089499 B2 JP H089499B2 JP 4336706 A JP4336706 A JP 4336706A JP 33670692 A JP33670692 A JP 33670692A JP H089499 B2 JPH089499 B2 JP H089499B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- fired magnesia
- magnesia dolomite
- dolomite brick
- dolomite
- 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.)
- Expired - Lifetime
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は焼成マグネシア・ドロマ
イトれんがに関するものである。FIELD OF THE INVENTION The present invention relates to fired magnesia dolomite bricks.
【０００２】[0002]
【従来の技術】焼成マグネシア・ドロマイトれんがは主
にＡＯＤ炉，溶鋼鍋、ＶＯＤ鍋等に使用されている。一
般的にマグネシア・ドロマイトれんがの特徴は以下の様
である。2. Description of the Related Art Fired magnesia dolomite bricks are mainly used in AOD furnaces, molten steel pots, VOD pots and the like. In general, the features of magnesia dolomite brick are as follows.
【０００３】高塩基度スラグに対する浸蝕性に強い。 比較的スポーリング性に良い。 熱間強度が低く摩耗に弱い。 消化する。 低価格である。It is highly corrosive to high basicity slag. Relatively good for spalling. Low hot strength and weak against wear. Digest. It is a low price.
【０００４】そして実際に使用すると、低〜中塩基度ス
ラグとの化学的反応，構造スポーリング，あるいは目地
溶損現象がその殆どを占めている。これらの要因は殆ど
はスラグの浸透に起因するものであり、このスラグ浸透
抑制が大きな課題であった。それに対し、マトリック
ス部へのＣａＯ分散 れんがの緻密化 等の策が成されたが、各々消化の問題，スポーリングの
問題により充分満足されるマグネシア・ドロマイトれん
は存在していないのが現状である。When actually used, most of them are chemical reaction with low to medium basicity slag, structural spalling, or joint dissolution damage phenomenon. Most of these factors are caused by the penetration of slag, and suppression of this slag penetration has been a major issue. On the other hand, although measures such as densification of CaO-dispersed bricks in the matrix part were taken, the present situation is that there are no magnesia dolomite bricks that are sufficiently satisfied due to digestion problems and spalling problems. .
【０００５】[0005]
【発明が解決しようとする課題】本発明は従来の技術で
は解決されてない耐スラグ浸透性を改善し、それにより
構造スポール性，目地溶損性，摩耗性を大巾に改善する
ことがねらいである。SUMMARY OF THE INVENTION The present invention aims to improve slag penetration resistance, which has not been solved by the prior art, and thereby greatly improve structural spalling property, joint erosion resistance and wear property. Is.
【０００６】[0006]
【課題を解決するための手段】本発明ではＭｇＯ，Ｃａ
Ｏ以外の成分を故意的に添加し、マトリックス部を改善
する手法を採用した。添加物としては種々研究の結果Ｃ
ｒ2Ｏ3成分が有効であることが判った。Ｃｒ2Ｏ3成分は
１０μｍ以下の微粉として添加した。その理由として
少量添加でより分散させるため、マトリックス部に添
加し、結合あるいはスラグ浸透防止といった効果をより
引き出すため、以上を加味すると１０μｍ以下の微粉と
なり、２〜５μｍが望ましいと考えられる。Means for Solving the Problems In the present invention, MgO, Ca
A method of intentionally adding components other than O to improve the matrix portion was adopted. As a result of various studies on additives C
It has been found that the r 2 O 3 component is effective. The Cr 2 O 3 component was added as fine powder of 10 μm or less. The reason for this is that it is added in a small amount to disperse more, and is added to the matrix part to bring out the effect of preventing binding or slag penetration.
【０００７】尚、添加量については種々の配合試験の結
果０．３〜５．０重量％範囲において有効であることが
判った。（表１）これは５．０重量％以上添加すると低
融点鉱物のＣａＯ・ＣｒＯ3が過剰に生成するためれん
がの製造上、軟化等により問題が生じる、又０．３重量
％以下では効果が小さいことによる。Regarding the amount of addition, it was found as a result of various compounding tests that it was effective in the range of 0.3 to 5.0% by weight. (Table 1) This is because when added in an amount of more than 5.0% by weight, CaO.CrO 3 which is a low melting point mineral is excessively produced, which causes a problem due to softening in the production of bricks. Because it's small.
【０００８】[0008]
【表１】 [Table 1]
【０００９】[0009]
【作用】Ｃｒ2Ｏ3は融液中に混入すると融液の粘性を上
げるため、特にスラグ中のＳｉＯ2成分の多い低塩基度
スラグの場合は耐火物中のＣｒ2Ｏ3が、粒界に浸入した
スラグによって生じた融液の粘性を上げ、浸食の進行を
防ぐ効果が大きい。又、高塩基度スラグにおいては、低
酸素分圧下でスラグ中のＣａＯ成分と高融点化合物を形
成する。結果として低塩基度から高塩基度に至るスラグ
の浸透を充分に抑え、高耐蝕性を得ることができる。Ｃ
ｒ2Ｏ3成分を微粉としてマトリックス部に添加すると、
上記の効果以外に緻密化，強度増加にもつながり、かつ
ドロマイトクリンカーの表面でＣａＯ・ＣｒＯ3として
ＣａＯを安定させるため耐消化性においても改善される
傾向を示した。When Cr 2 O 3 is mixed in the melt, it raises the viscosity of the melt. Therefore, especially in the case of low basicity slag with a large amount of SiO 2 component in the slag, Cr 2 O 3 in the refractory is The effect of increasing the viscosity of the melt generated by the slag that has penetrated into the slag and preventing the progress of erosion is great. Further, in the high basicity slag, a CaO component in the slag and a high melting point compound are formed under a low oxygen partial pressure. As a result, penetration of slag from low basicity to high basicity can be sufficiently suppressed, and high corrosion resistance can be obtained. C
When the r 2 O 3 component is added as a fine powder to the matrix part,
In addition to the above effects, it also leads to densification and increase in strength, and since CaO is stabilized as CaO.CrO 3 on the surface of the dolomite clinker, the digestion resistance tends to be improved.
【００１０】[0010]
【実施例】表１に本発明の実施例と比較例の配合組成と
耐火物の特性を示す。いずれもフェノール系樹脂をバイ
ンダーとして加え、混練，成形，焼成によりれんがを製
作した。本発明品ＮＯ．３，４，５は従来品，ＮＯ．
１，２，６に比較して耐スラグ浸透性に優れ、それに起
因する耐構造スポーリング性，耐蝕性にも大きな効果が
現われた。[Examples] Table 1 shows the composition and refractory properties of Examples and Comparative Examples of the present invention. In each case, a phenolic resin was added as a binder, and a brick was manufactured by kneading, molding and firing. Inventive product NO. Nos. 3, 4, and 5 are conventional products, and NO.
Compared with Nos. 1, 2, and 6, the slag penetration resistance was excellent, and due to this, a great effect was exerted on the structural spalling resistance and the corrosion resistance.
【００１１】本発明による実施例ＮＯ．４のれんがを５
０тＶＯＤ取鍋内張りとして使用した結果表２の様であ
った。Example No. 1 according to the present invention. 4 bricks 5
As a result of using it as a liner for 0VOD ladle, the results are shown in Table 2.
【００１２】[0012]
【表２】 [Table 2]
【００１３】従来品は残厚が少なく、非稼動面まで全面
にスラグが浸透していた。又、稼動面は本発明品は従来
品に比べ滑らかでスポーリングの傾向は無かった。The conventional product has a small residual thickness, and the slag permeates the entire surface to the non-operating surface. Further, the operating surface of the product of the present invention was smoother than that of the conventional product and there was no tendency to spall.
【００１４】[0014]
【発明の効果】マグネシアとドロマイトを主成分とする
耐火材料に酸化クロム微粉を０．３〜５．０重量％添加
した焼成マグネシア・ドロマイトれんがは実使用におい
てもスラグ浸透厚みで１７％減少し、その結果として３
７％の溶損速度の低減が認められ耐スラグ浸透性に大き
な改善効果を得ることができた。またそれにより耐構造
スポーリング性，耐蝕性などにも大きな効果が得られ
た。The fired magnesia dolomite brick obtained by adding 0.3 to 5.0% by weight of chromium oxide fine powder to the refractory material containing magnesia and dolomite as the main components has a slag permeation thickness reduced by 17% even in actual use. As a result 3
A 7% reduction in the erosion rate was observed, and a large improvement effect on the slag penetration resistance could be obtained. In addition, it has a great effect on structural spalling resistance and corrosion resistance.
Claims (1)
重量％に対し１０μｍ以下の酸化クロム微粉を０．３〜
５．０重量％添加してなる焼成マグネシア・ドロマイト
れんが。Refractory material 100 based on magnesia and dolomite 100
0.3% of chromium oxide fine powder of 10 μm or less with respect to weight%
Burned magnesia dolomite brick made by adding 5.0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4336706A JPH089499B2 (en) | 1992-11-24 | 1992-11-24 | Fired magnesia dolomite brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4336706A JPH089499B2 (en) | 1992-11-24 | 1992-11-24 | Fired magnesia dolomite brick |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06157131A JPH06157131A (en) | 1994-06-03 |
| JPH089499B2 true JPH089499B2 (en) | 1996-01-31 |
Family
ID=18301955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4336706A Expired - Lifetime JPH089499B2 (en) | 1992-11-24 | 1992-11-24 | Fired magnesia dolomite brick |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089499B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9878592B2 (en) | 2014-09-12 | 2018-01-30 | Hyundai Motor Company | Method and system for defogging of vehicle |
| US9936327B2 (en) | 2013-07-22 | 2018-04-03 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and signal processing unit for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765951A (en) * | 2012-08-02 | 2012-11-07 | 营口青花耐火材料股份有限公司 | Magnesium-calcium-titanium-carbon brick and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430383B2 (en) * | 1974-05-22 | 1979-09-29 | ||
| JPS61247656A (en) * | 1985-04-22 | 1986-11-04 | ハリマセラミック株式会社 | Carbon-containing basic refractories |
-
1992
- 1992-11-24 JP JP4336706A patent/JPH089499B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9936327B2 (en) | 2013-07-22 | 2018-04-03 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and signal processing unit for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration |
| US10154362B2 (en) | 2013-07-22 | 2018-12-11 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for mapping first and second input channels to at least one output channel |
| US10701507B2 (en) | 2013-07-22 | 2020-06-30 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for mapping first and second input channels to at least one output channel |
| US11272309B2 (en) | 2013-07-22 | 2022-03-08 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for mapping first and second input channels to at least one output channel |
| US11877141B2 (en) | 2013-07-22 | 2024-01-16 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and signal processing unit for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration |
| US9878592B2 (en) | 2014-09-12 | 2018-01-30 | Hyundai Motor Company | Method and system for defogging of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06157131A (en) | 1994-06-03 |
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