JPS6355158A - Manufacture of magnesia base porous plug - Google Patents
Manufacture of magnesia base porous plugInfo
- Publication number
- JPS6355158A JPS6355158A JP61200444A JP20044486A JPS6355158A JP S6355158 A JPS6355158 A JP S6355158A JP 61200444 A JP61200444 A JP 61200444A JP 20044486 A JP20044486 A JP 20044486A JP S6355158 A JPS6355158 A JP S6355158A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- zirconia
- refractory
- porous plug
- present
- 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
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims description 26
- 239000000395 magnesium oxide Substances 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 235000012245 magnesium oxide Nutrition 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000004901 spalling Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 208000018999 crinkle Diseases 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、マグネシア質ポーラスプラクの製造法に係る
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing magnesia porous plaques.
従来、１）溶鋼温度及び成分を均一化し、２）水素など
の不純ガスを除去し、３）溶鋼中に懸濁している介在物
を浮上させて溶鋼の清浄度を高めるために、取鍋内の溶
鋼にアルゴンガス等の不活性カスを吹込み、溶鋼を攪拌
する方法が広く採用されている。Conventionally, in order to 1) equalize the temperature and composition of molten steel, 2) remove impurity gases such as hydrogen, and 3) raise the inclusions suspended in molten steel to improve the cleanliness of molten steel, A widely used method is to inject inert gas such as argon gas into the molten steel and stir the molten steel.
上記ガス吹込法では、取鍋底に、通気性の良好なプラグ
状に成形した耐火物（以下ポーラスプラグという）を装
着し、そのづラタを通してガスを吹込むのが一般的であ
る。In the above-mentioned gas blowing method, a plug-shaped refractory with good air permeability (hereinafter referred to as a porous plug) is attached to the bottom of the ladle, and gas is generally blown through the ladle.
ポーラスプラグは溶鋼と直接接触するため、通気性だけ
でなく、耐火性、耐食性及び耐スポーリング性に優れ且
つ高い熱間強度を有することをも要求されている。マグ
ネシアクリンカーを主成分とするポーラスプラグは、高
耐食性及び高耐火性であるが、気孔率が高すぎるだめ熱
間強度が低く、耐スポーリング性も充分ではない。Since porous plugs come into direct contact with molten steel, they are required not only to have good air permeability, but also to have excellent fire resistance, corrosion resistance, spalling resistance, and high hot strength. Porous plugs containing magnesia clinker as a main component have high corrosion resistance and high fire resistance, but their porosity is too high, resulting in low hot strength and insufficient spalling resistance.
上記の欠点を解消するものとして、マタネシアクリン力
−に酸化鉄を添加したマクネシア質ポーラスプラグが提
案されている（特公昭６１−１８８９号）。これは、マ
タネシアクリン力−の粗粒（０，２ｆ１以上）を使用し
て通気性を確保し、酸化鉄を添加して強度を向上させた
ものでちる。In order to overcome the above-mentioned drawbacks, a maknesia porous plug in which iron oxide is added to matanesia clinic strength has been proposed (Japanese Patent Publication No. 1889/1989). This is made by using coarse grains (0.2f1 or more) of matanesia crinkle to ensure air permeability, and adding iron oxide to improve strength.
しかしながら、これを溶融金属へのガス吹込みに使用す
ると、酸化鉄によって液相が生成し、熱間強度が充分に
発現されず、溶鋼による摩耗を受は易い。However, when this is used for blowing gas into molten metal, a liquid phase is generated due to iron oxide, and hot strength is not sufficiently developed and it is easily abraded by molten steel.
問題点を解決するための手段
本発明者は、上記従来技術の問題点に鑑みて鋭意研究を
重ねた結果、マグネシアクリンカ−にジルコニアを添加
するととＫよって、耐火性、耐食性及び通気性に優れ、
熱間強度及び溶鋼に対する耐摩耗性が著しく改良された
ポーラスプラグが得られることを見出し、本発明を完成
した。Means for Solving the Problems The present inventor has conducted extensive research in view of the problems of the prior art described above, and has found that adding zirconia to magnesia clinker has excellent fire resistance, corrosion resistance, and air permeability. ,
The present invention was completed based on the discovery that a porous plug with significantly improved hot strength and wear resistance against molten steel can be obtained.
即ち本発明は、粒径８ｆｌ以下、純度９０％以上のマタ
ネシアクリン力−９０〜９９重量多と粒径２ｆｌ以下の
ジルコニア１〜１０重量％とからなる耐火物原料１００
重量部及びバインター２〜６重量部を混練し、成形し、
焼成することを特徴とす本発明では、耐火物原料として
、耐火性、耐食性及び通気性に優れるマグネシアクリン
カ−九並びに熱間強度及び溶鋼に対する耐摩耗性を著し
く改良できるジルコニアを使用する。That is, the present invention provides refractory raw material 100 consisting of matanesia with a particle size of 8 fl or less and a purity of 90% or more, which has a curing power of -90 to 99% by weight, and 1 to 10 weight % of zirconia with a particle size of 2 fl or less.
Parts by weight and 2 to 6 parts by weight of binder are kneaded and molded,
In the present invention, which is characterized by firing, magnesia clinker-9, which has excellent fire resistance, corrosion resistance, and air permeability, and zirconia, which can significantly improve hot strength and wear resistance against molten steel, are used as refractory raw materials.
マグネシアクリンカーとしては、粒径８ｆｆ以下、Ｍｆ
Ｏ含量９０％以上のものを使用する。粒径が８顛を越え
ると、耐火物の強度が低下し好ましくない。またＭｆＯ
含量が９０重量％未満では、耐火物の耐食性が低下する
。本発明では、マグネシアクリンカ−を使用するに当っ
ては、例えば、３〜１顛程度のものが０〜８０重量％、
１〜０．３ｎ程度のものが０〜８０重量％、０．０４４
顛以下程度のものが５〜２０ｆｆｉｉ１％程度となるよ
うに粒度調整すればよい。マグネシアクリンカ−の配合
量は、耐火物原料全量の９０〜９９重量％程度とするの
がよい。９０重屋％未満では、耐火物の耐食性が低下す
る。一方９９重量％を越えると、熱間強度が低下する。As magnesia clinker, particle size is 8ff or less, Mf
Use one with an O content of 90% or more. If the particle size exceeds 8, the strength of the refractory will decrease, which is not preferable. Also MfO
If the content is less than 90% by weight, the corrosion resistance of the refractory will decrease. In the present invention, when using magnesia clinker, for example, about 3 to 1 size is 0 to 80% by weight,
0 to 80% by weight of about 1 to 0.3n, 0.044
The particle size may be adjusted so that the proportion of particles smaller than 1% is about 5 to 20 ffii. The amount of magnesia clinker blended is preferably about 90 to 99% by weight of the total amount of refractory raw materials. If the content is less than 90%, the corrosion resistance of the refractory will decrease. On the other hand, if it exceeds 99% by weight, hot strength decreases.
ジルコニア（Ｚ ｒＯ２）としては、未安定化ジルコニ
ア及び安定化ジルコニアのいずれもが使用できるが、結
晶系の変態（単斜格子 立方格子）によって靭性の強化
即ち耐スポーリング性の向上を期待できる未安定化ジル
コニアの方が好ましい。As zirconia (Z rO2), both unstabilized zirconia and stabilized zirconia can be used, but unstabilized zirconia can be used, but unstabilized zirconia is expected to improve toughness, that is, improve spalling resistance, due to transformation of the crystal system (monoclinic lattice to cubic lattice). Stabilized zirconia is preferred.
ジルコニアの粒径は２ｎ以下程度、好ましくは０．０４
４ｆｆ以下程度とするのがよい。粒径が２ｎを越えるジ
ルコニア粒子を使用すると、耐火物組織中に均一に分散
せず、耐火物の強度が不均一とな夛好ましくない。The particle size of zirconia is about 2n or less, preferably 0.04
It is preferable to set it to about 4ff or less. If zirconia particles with a particle size of more than 2n are used, they will not be uniformly dispersed in the refractory structure and the strength of the refractory will be non-uniform, which is undesirable.
ジルコニアの配合量は、耐火物原料の１〜１０重量％程
度とするのがよい。１重量％未満では、熱間強度向上効
果がなく、一方１０重量％を越えると、耐火物が焼結し
難くなシ、強度劣化を誘発する。The amount of zirconia blended is preferably about 1 to 10% by weight of the refractory raw material. If it is less than 1% by weight, there will be no effect of improving hot strength, while if it exceeds 10% by weight, the refractory will not be easily sintered and its strength will deteriorate.
ジルコニア粒子は、マグネシアクリンカ−中のペリクレ
ース結晶とダイレクトボンドを形成するとともに、Ｍｆ
Ｏ粒子中に生成する液相を高粘性、高融点化し、且つ液
相を分断するという効果を有するため、耐火物に実炉使
用に耐え得る充分な熱間強度を付与し、溶鋼に対する耐
摩耗性を向上させる。The zirconia particles form a direct bond with the periclase crystal in the magnesia clinker, and the Mf
It has the effect of increasing the viscosity and melting point of the liquid phase generated in the O particles and dividing the liquid phase, giving the refractory sufficient hot strength to withstand use in an actual furnace and providing wear resistance against molten steel. Improve your sexuality.
本発明では、バインターとしては、通常耐火物に用いら
れるものが何れも使用でき、例えば、二ガリ１ショ糖）
リタニン、糖蜜等を挙げるととができる。バインダーの
配合量は、耐火物原料１００重量部に対し２〜６重量部
程度とするのがよい。In the present invention, as the binder, any binder that is normally used for refractories can be used, such as
Litanine, molasses, etc. can be cited. The blending amount of the binder is preferably about 2 to 6 parts by weight per 100 parts by weight of the refractory material.
２重Ｒ部未満では、耐火物の成形性が劣る。一方６重量
部を越えると、ラミネーション、亀裂が発生しやすくな
る。If the number of R parts is less than 2, the moldability of the refractory is poor. On the other hand, if the amount exceeds 6 parts by weight, lamination and cracking are likely to occur.
本発明ポーラスプラグは、上記各原料の夫々所定量を混
練し、この混練物をオイルプレス等の通常の方法にて４
００〜１０００に９／ｄ程度の圧力下に適当な大きさの
プラグ状に成形し、この成形体を１６００〜１８００℃
で焼成することにょって製造される。The porous plug of the present invention can be produced by kneading predetermined amounts of each of the above raw materials, and then using the kneaded product in a conventional method such as an oil press.
00 to 1000 to a plug shape of an appropriate size under a pressure of about 9/d, and this molded body was heated to 1600 to 1800°C.
It is manufactured by firing.
本発明ポーラスブラタは、マクネジアクリンカ−によっ
て優れた耐火性、耐食性及び通気性を付与され、更にジ
ルコニアによって高い熱間強度及び溶ｍＫ対する耐摩耗
性を付与されている。また、溶鋼又はスラグ浸透層が極
めて薄く、使用時には表面のみが薄く剥離するので、通
気性を維持でき、更に耐スポーリング性をも向上させる
ことができる。The porous blaster of the present invention is provided with excellent fire resistance, corrosion resistance, and air permeability by MacNedia linker, and furthermore, is provided with high hot strength and wear resistance against melting mK by zirconia. In addition, since the molten steel or slag permeation layer is extremely thin and only the surface peels off during use, air permeability can be maintained and spalling resistance can also be improved.
以下に実施例及び比較例を挙げ、本発明をよシー層明瞭
なものとする。Examples and comparative examples are given below to make the present invention more clearly understood.
実施例１〜５
耐火物原料（マグネシアクリンカ−〇ＭｆＯ含有量は９
５％）を第１表に示す配合割合で使用し、耐大物原料１
００重量部にバインダーとしてショ糖の５０％水溶液３
．５重量部を加え、ミ士す−で２０分間混練した。この
混線物を、オイルプレスにて１０００ｋｇ／ｄの圧力下
に成形して、高さ１７０１１ｊ１１径８０〜１１０Ｍの
截頭円錐形（プラグ状）成形体とした。この成形体を１
６９０°Ｃで焼成し、本発明ポーラスプラグを得た。Examples 1 to 5 Refractory raw material (magnesia clinker - MfO content is 9
5%) in the proportions shown in Table 1, and
50% aqueous solution of sucrose as a binder to 00 parts by weight 3
．． 5 parts by weight were added and kneaded in a mixer for 20 minutes. This mixed wire material was molded under a pressure of 1000 kg/d using an oil press to form a truncated conical (plug-shaped) molded product with a height of 17011j11 and a diameter of 80 to 110 m. This molded body is 1
The porous plug of the present invention was obtained by firing at 690°C.
得られた本発明ポーラスプラグ用耐火物を性能試験に供
した。結果を第１表に示す。The obtained refractory for porous plugs of the present invention was subjected to a performance test. The results are shown in Table 1.
比較例１
ジルコニアに代えて酸化鉄（Ｆｅ２Ｏ２）を使用する以
外は実施例と同様にして従来のポーラスプラグを得、性
能試験に供した。結果を第１表に示す。Comparative Example 1 A conventional porous plug was obtained in the same manner as in the example except that iron oxide (Fe2O2) was used instead of zirconia, and was subjected to a performance test. The results are shown in Table 1.
第 １ 表 １）高周波炉内張夛法、１７５０”ＣＸ２とＰ。Table 1 1) High frequency furnace lining method, 1750"CX2 and P.
普通鋼による。Made of ordinary steel.
２）電気炉を使用、剥離までの＠数を示す。2) Use an electric furnace and indicate the @ number until peeling.
第１表よシ、本発明品（実施例１〜５）が、従来品（比
較例１）に比べ、通気性、耐食性、耐スポーリング性及
び熱間強度に優れていることが判る。Table 1 shows that the products of the present invention (Examples 1 to 5) are superior in air permeability, corrosion resistance, spalling resistance, and hot strength compared to the conventional product (Comparative Example 1).
本発明品（実施例１）と従来品とを夫々取鍋に装着し、
アルゴンガスを通して各種溶鋼の攪拌を行ない、１チヤ
ージ当シの溶損量＜１１１／ｅｋ＞ を調べた。結果
を第２表に示す。The product of the present invention (Example 1) and the conventional product were each attached to a ladle,
Various types of molten steel were stirred through argon gas, and the amount of corrosion loss per charge <111/ek> was investigated. The results are shown in Table 2.
第 ２ 表
第２表よ）、本発明品が、従来品に比べ溶銅に対する耐
摩耗性に優れていることが判る。Table 2) It can be seen that the products of the present invention have superior wear resistance to molten copper compared to conventional products.
（以 上）(that's all)
Claims (1)
ンカー９０〜９９重量％と粒径２ｍｍ以下のジルコニア
１〜１０重量％とからなる耐火物原料１００重量部及び
バインダー２〜６重量部を混練し、成形し、焼成するこ
とを特徴とするマグネシア質ボーラスプラグの製造法。1. Knead 100 parts by weight of a refractory raw material consisting of 90-99% by weight of magnesia clinker with a particle size of 3 mm or less and a purity of 90% or more and 1-10% by weight of zirconia with a particle size of 2 mm or less and 2-6 parts by weight of a binder, A method for producing a magnesia bolus plug, which is characterized by molding and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200444A JPH0742161B2 (en) | 1986-08-26 | 1986-08-26 | Manufacturing method of magnesia porous plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200444A JPH0742161B2 (en) | 1986-08-26 | 1986-08-26 | Manufacturing method of magnesia porous plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6355158A true JPS6355158A (en) | 1988-03-09 |
| JPH0742161B2 JPH0742161B2 (en) | 1995-05-10 |
Family
ID=16424398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61200444A Expired - Lifetime JPH0742161B2 (en) | 1986-08-26 | 1986-08-26 | Manufacturing method of magnesia porous plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742161B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992011220A1 (en) * | 1990-12-18 | 1992-07-09 | Magnesitwerk Aken Gmbh | Porous fireproof rinsing element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051659A (en) * | 1983-08-30 | 1985-03-23 | ハリマセラミック株式会社 | Porous nozzle |
| JPS6065778A (en) * | 1983-09-19 | 1985-04-15 | ハリマセラミック株式会社 | Porous slag |
| JPS611389U (en) * | 1984-06-08 | 1986-01-07 | 正二 岩井 | Workbench |
-
1986
- 1986-08-26 JP JP61200444A patent/JPH0742161B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051659A (en) * | 1983-08-30 | 1985-03-23 | ハリマセラミック株式会社 | Porous nozzle |
| JPS6065778A (en) * | 1983-09-19 | 1985-04-15 | ハリマセラミック株式会社 | Porous slag |
| JPS611389U (en) * | 1984-06-08 | 1986-01-07 | 正二 岩井 | Workbench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992011220A1 (en) * | 1990-12-18 | 1992-07-09 | Magnesitwerk Aken Gmbh | Porous fireproof rinsing element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0742161B2 (en) | 1995-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW201100351A (en) | Unburned alumina-carbon brick and kiln facility utilizing same | |
| KR20190077443A (en) | Magnesia carbon bricks and manufacturing method thereof | |
| JP2016527083A (en) | Batches for making carbon-bonded or resin-bonded shaped refractory products, methods for making the products, the products, and the use of magnesia spinel-zirconium oxide | |
| CN104193363B (en) | A kind of method improving MgO-C brick intensity | |
| JPS6355158A (en) | Manufacture of magnesia base porous plug | |
| JPS6132378B2 (en) | ||
| JPS6119584B2 (en) | ||
| JPS6335593B2 (en) | ||
| JP3672476B2 (en) | Silicon iron nitride powder and refractory | |
| JPS6059189B2 (en) | Sintered refractory brick for ultra-dense glass furnace and its manufacturing method | |
| JPS63311081A (en) | Dry type ramming material for crucible type induction furnace | |
| JPH03170367A (en) | Refractory for continuous casting and its production | |
| JP3027721B2 (en) | Porous plug refractory and manufacturing method thereof | |
| JP3176836B2 (en) | Irregular refractories | |
| JPS62207757A (en) | Manufacture of chromium oxide-containing fine refractories | |
| JP2947390B2 (en) | Carbon containing refractories | |
| JPH1157957A (en) | Sliding nozzle plate and its manufacture | |
| JP2000191364A (en) | Shaped magnesia-chrome refractory | |
| JP2872670B2 (en) | Irregular refractories for lining of molten metal containers | |
| JP2989118B2 (en) | Silicon iron nitride | |
| JPH06172044A (en) | Castable refractory of alumina spinel | |
| JP2003306388A (en) | Electromelted spinel raw material and refractory material using the same | |
| JP2000327407A (en) | High spalling resistant chromia-containing brick and molten metal vessel | |
| JPH02283656A (en) | Carbon-containing refractory | |
| JPH07300360A (en) | Magnesia refractory |