JPH03205368A - Castable alumina-spinel refractory - Google Patents
Castable alumina-spinel refractoryInfo
- Publication number
- JPH03205368A JPH03205368A JP1342421A JP34242189A JPH03205368A JP H03205368 A JPH03205368 A JP H03205368A JP 1342421 A JP1342421 A JP 1342421A JP 34242189 A JP34242189 A JP 34242189A JP H03205368 A JPH03205368 A JP H03205368A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- raw material
- spinel
- refractory
- 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.)
- Pending
Links
- 229910052596 spinel Inorganic materials 0.000 title claims abstract description 24
- 239000011029 spinel Substances 0.000 title claims abstract description 24
- 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 33
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000011823 monolithic refractory Substances 0.000 claims description 14
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract 4
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 4
- 239000000835 fiber Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 10
- 230000035515 penetration Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000011819 refractory material Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 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〕
本発明は、耐用性に優れた製鋼炉内張用アルミナースピ
ネル質不定形耐火物に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alumina-spinel monolithic refractory for lining a steelmaking furnace that has excellent durability.
取鍋、真空脱ガス炉などの製鋼炉の内張り用耐火物とし
て、従来アルミナ質不定形耐火物が使用されてきたが、
該アルミナ質不定形耐火物はスラグ成分の浸透が大きく
、構造スポールによる剥離損耗が著しい。Alumina monolithic refractories have traditionally been used as refractories for lining steelmaking furnaces such as ladles and vacuum degassing furnaces.
The alumina monolithic refractories are highly penetrated by slag components and are subject to significant peeling and wear due to structural spalls.
そこでスピネル原料を組み合わせることによって、スラ
グ戒分の浸透が緩和される等の効果を期待して、ＭｇＯ
・Ａ６２ ０３系スピネル原料（以下スピネル原料と記
す）を組合せたアルミナスピネル質不定形耐火物が提案
されている。また上記アルミナ質不定形耐火物は、Ｍｇ
○を含むためにＦｅ酸化物に対する耐食性も向上するな
どの効果があり、取鍋用耐火物などに使用されている。Therefore, by combining spinel raw materials, we expected to have the effect of reducing the penetration of slag precepts, etc.
- An alumina spinel monolithic refractory has been proposed which is a combination of A6203 spinel raw material (hereinafter referred to as spinel raw material). Further, the above alumina monolithic refractory has Mg
Because it contains O, it has the effect of improving corrosion resistance against Fe oxides, and is used in refractories for ladle, etc.
従来のアルミナ・スピネル質不定形耐火物は、近年の苛
酷化する操業条件にあって、その寿命は著しく短くなる
場合もあり、本発明においてはさらに耐用性に優れた不
定形耐火物を提供することを目的とする。The life of conventional alumina-spinel monolithic refractories is sometimes significantly shortened due to increasingly severe operating conditions in recent years, and the present invention provides monolithic refractories with even greater durability. The purpose is to
上記の目的を達或するために、本発明は以下の手段を提
供する。すなわち、アルミナ質耐火原料４７〜９４重量
％、粒径１鮪以下のＭｇＯ−Ａ７！２０３系スピネルク
リンカ−５〜５０重量％、アルミナセメント１〜３重量
％よりなるアルミナ・スピネル質不定形耐火物である。In order to achieve the above object, the present invention provides the following means. That is, an alumina-spinel monolithic refractory consisting of 47 to 94% by weight of an alumina refractory raw material, 5 to 50% by weight of MgO-A7!203 spinel clinker with a particle size of 1 or less, and 1 to 3% by weight of alumina cement. It is.
さらに、アル藁ナ質耐火原料として粒径５μｍ以下のア
ルミナ超微粉を５〜２０重量％使用するアルミナ・スピ
ネル質不定形耐火物であることが望ましい。Furthermore, it is preferable that the alumina-spinel monolithic refractory is made using 5 to 20% by weight of ultrafine alumina powder with a particle size of 5 μm or less as the alumina refractory raw material.
本発明で使用するアルミナ原料としては、電融アルミナ
、焼結アルミナクリンカー、仮焼アルミナなどの人工原
料、ばん土頁岩、ボーキサイト等の天然原料を組み合わ
せて使用できるが、耐食性を低下させないため、アル５
ナ原料全体の平均アルミナ純度は８０％以上にするのが
望ましい。粒度は従来と特に変わりなく、不定形耐火物
が施工によって密充填されるよう、例えば最大粒径を１
０ｘ程度とし、粗粒、中粒、微粒の配合を適宜調整され
る。アルミナ原料の割合は、４７〜９４重量％が望まし
く、４７重量％未満であれば耐食性および耐スラグ浸透
性に劣る。また、９４重量％を超えると、スピネル原料
の割合が少なくなり、耐スラグ浸透性に劣る。The alumina raw material used in the present invention can be a combination of artificial raw materials such as fused alumina, sintered alumina clinker, and calcined alumina, and natural raw materials such as clay shale and bauxite. 5
It is desirable that the average alumina purity of the entire raw material be 80% or more. The particle size is not particularly different from the conventional one, but the maximum particle size is, for example, 1.
It is set to about 0x, and the composition of coarse particles, medium particles, and fine particles is adjusted as appropriate. The proportion of the alumina raw material is preferably 47 to 94% by weight, and if it is less than 47% by weight, corrosion resistance and slag penetration resistance are poor. Moreover, when it exceeds 94% by weight, the proportion of the spinel raw material decreases, resulting in poor slag penetration resistance.
なお、アルミナ原料の微粉については、粒径５μｍ以下
の超微粉部分が５〜２０重量％存在するように配合すれ
ば、耐食性、耐スラグ浸透性、強度および１４００℃〜
１７００℃程度の高温での体積安定性が向上する。アル
藁ナ超微粉の割合が５重量％未満であると効果が少なく
、２０重量％を超えると、流動性のコントロールが困難
となり、施工できなくなる。Regarding the fine powder of alumina raw material, if it is blended so that 5 to 20% by weight of ultrafine powder with a particle size of 5 μm or less exists, corrosion resistance, slag penetration resistance, strength, and 1400 ° C.
Volume stability at high temperatures of about 1700°C is improved. If the proportion of ultrafine alumina powder is less than 5% by weight, the effect will be small, and if it exceeds 20% by weight, it will be difficult to control fluidity and construction will not be possible.
またスピネル原料は、粒径が１ｆｌ以下で、好ましくは
０．５ｆｉ以下が良い。粒径１ｌ１以上では耐久ラグ浸
透性が著しく劣化する。スピネルクリンカーの割合は、
５〜１０重量％である。５重量％未満では、スラグ浸透
の抑制効果がほとんどなく、５０重量％を超えて使用す
ると耐食性が著しく低下する。本発明で使用するスピネ
ル原料は、゛電融品、焼結タリンカーのいずれでもよく
、またこれらを組み合わせて使用しても良い。スピネル
を構威するＭ ｇ Ｏ−Ａ ｊ！ ２０３の威分比は必
ずしも理論組或のものでなくても良く、ＭｇＯ／Ａｊ！
ｚｏ，の重量比が１ ０／９ ０〜４ ０／６ ０の範
囲内のものが好ましい。Further, the spinel raw material has a particle size of 1 fl or less, preferably 0.5 fi or less. If the particle size is 1l1 or more, the durable lag permeability will be significantly deteriorated. The proportion of spinel clinker is
It is 5 to 10% by weight. If it is less than 5% by weight, there is almost no effect of suppressing slag penetration, and if it is used in excess of 50% by weight, corrosion resistance will be significantly reduced. The spinel raw material used in the present invention may be either an electrofused product or a sintered spinel material, or a combination of these may be used. M g O-A j with Spinel! The power ratio of 203 does not necessarily have to be a theoretical set, and MgO/Aj!
The weight ratio of zo is preferably in the range of 10/90 to 40/60.
アルミナセメントは耐火物のバインダーとして、従来一
般に使用されているものが使用できるが、Ａ １ ｚ
０３ ／ Ｃ ａ Ｏの重量比が５０／５０〜９０／１
０のものが好ましい。配合割合はｌ〜３重量％である。Alumina cement that has been commonly used as a binder for refractories can be used, but A 1 z
03/C a O weight ratio is 50/50 to 90/1
0 is preferred. The blending ratio is 1 to 3% by weight.
１重量％未満ではバインダーとしての強度付与効果がな
い。また、３重量％を超えるとアルミナセメント中のＣ
ａＯが、ＡｌｌｚＯｘ、Ｍｇ○および不順物のＳｔ○２
と反応し、１３５０℃付近で低融点物を作り、さらに１
４００〜１７００℃に加熱すると、Ｃａ０・６Ａ６２
０３を析出する。Ｃａ０・６Ａ７！２０３は高融点（１
８００℃）であるので、使用時に溶融することなく戒長
しつづけ、やがては組織を破壊する。従って、アルミナ
セメント使用量は３重量％以内にする必要がある。If it is less than 1% by weight, it has no strength imparting effect as a binder. In addition, if it exceeds 3% by weight, C in alumina cement
aO is AllzOx, Mg○ and impurities St○2
reacts with 1350°C to form a low melting point substance, and further 1
When heated to 400-1700℃, Ca0・6A62
03 is precipitated. Ca0・6A7!203 has a high melting point (1
(800°C), it will continue to heat up without melting during use, eventually destroying the tissue. Therefore, the amount of alumina cement used must be within 3% by weight.
本発明は以上の配合物からなるものであるが、本発明の
効果を阻害しない範囲内でさらに有機、無機、金属等の
ファイバー、金属粉、他の耐火原料などを添加してもよ
い。Although the present invention consists of the above-mentioned composition, organic, inorganic, metallic fibers, metal powder, other refractory raw materials, etc. may be added within a range that does not impede the effects of the present invention.
施工は常法通り、外掛けで４〜１５重量％程度の水分を
添加して混練し、型枠を用いて鋳込み或形される。鋳込
みの際に充填性を向上させるため、一般には型枠にバイ
ブレーターを取り付けるか、あるいは不定形耐火物中に
棒状パイブレークーを挿入する。The construction is carried out in the usual way, by adding 4 to 15% by weight of water to the outside, kneading it, and casting or shaping it using a mold. To improve filling performance during casting, a vibrator is generally attached to the formwork, or a rod-shaped pie breaker is inserted into the monolithic refractory.
第１表は各例で用いた耐火原料の化学組戒を示す。第２
表は本発明による実施例と比較例の配合比と試験結果を
示す。各例はいずれも水を外掛けで８％添加し、型枠内
に震動鋳込或形し、１１０”ｃｘ２４ｈで乾燥後、以下
の要領で試験を行った。Table 1 shows the chemical composition of the refractory raw materials used in each example. Second
The table shows the compounding ratios and test results of Examples according to the present invention and Comparative Examples. In each example, 8% water was added externally, and the mold was vibrated cast into a mold, dried at 110"x24 hours, and then tested as follows.
・曲げ強さーＪＩＳ−Ｒ２５５３に準じる・熱変化率＝
ＪＩＳ−Ｒ２５５４に準じる。・Bending strength - According to JIS-R2553 ・Thermal change rate =
According to JIS-R2554.
・回転侵食＝鋼片と溶鋼取鍋スラグとの重量比が１：１
で、１６５０℃ｘ５ｈ試験後、
溶損寸法とスラグ浸透寸法を測定した。・Rotary erosion = weight ratio of steel slab and molten steel ladle slag is 1:1
After testing at 1650°C for 5 hours, the dimensions of erosion and slag penetration were measured.
第２表に試験値から、いずれの本実施例品も溶損量およ
びスラグ浸透量が少なく、構造スポールによる剥離損耗
を防止することがわかる。From the test values shown in Table 2, it can be seen that all of the products of this example had a small amount of erosion loss and slag penetration, and were able to prevent peeling and wear due to structural spalls.
なお、本発明は上記実施例に限られるものではなく、種
々の応用が可能であることはいうまでもない。It goes without saying that the present invention is not limited to the above embodiments, and can be applied in various ways.
く以下余白〉
第
１
表
〔発明の効果〕
本発明のアルミナースピネル質不定形耐火物は、従来の
アルミナースピネル質不定形耐火物に比べ、耐食性およ
び耐スラグ浸透性に優れており、溶綱取鍋の寿命が従来
例に比べ少なくとも１．６倍以上の耐用性が得られる。Table 1 [Effects of the Invention] The alumina-spinel monolithic refractory of the present invention has excellent corrosion resistance and slag penetration resistance compared to conventional alumina-spinel monolithic refractories. The life of the rope ladle is at least 1.6 times longer than that of the conventional example.
従って、最近の高級網指向による操業条件の苛酷化、あ
るいは耐火物原単位の低減指向において、本発明の工業
的価値は高い。Therefore, the industrial value of the present invention is high in view of the harsher operating conditions due to the recent trend toward high-grade nets, or the trend toward reducing the unit consumption of refractories.
１０10
Claims (2)
ｍ以下のＭｇＯ・Ａｌ＿２Ｏ＿３系スピネル耐火原料５
〜４０重量％、アルミナセメント１〜３重量％よりなる
ことを特徴とするアルミナ−スピネル質不定形耐火物。(1) Alumina refractory raw material 47-94% by weight, particle size 1m
m or less MgO・Al_2O_3-based spinel refractory raw material 5
An alumina-spinel monolithic refractory characterized by comprising ~40% by weight and 1~3% by weight of alumina cement.
ミナ超微粉が含まれていて、該アルミナ超微粉の配合量
が５〜２０重量％であることを特徴とする特許請求範囲
第１項に記載のアルミナ−スピネル質不定形耐火物。(2) Claim 1 is characterized in that the alumina refractory raw material contains ultrafine alumina powder with a particle size of 5 μm or less, and the amount of the ultrafine alumina powder is 5 to 20% by weight. The alumina-spinel monolithic refractory described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1342421A JPH03205368A (en) | 1989-12-30 | 1989-12-30 | Castable alumina-spinel refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1342421A JPH03205368A (en) | 1989-12-30 | 1989-12-30 | Castable alumina-spinel refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03205368A true JPH03205368A (en) | 1991-09-06 |
Family
ID=18353604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1342421A Pending JPH03205368A (en) | 1989-12-30 | 1989-12-30 | Castable alumina-spinel refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03205368A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0535233A1 (en) * | 1991-04-16 | 1993-04-07 | Shinagawa Refractories Co., Ltd. | Unshaped alumina spinel refractory |
| KR100446873B1 (en) * | 2001-12-24 | 2004-09-07 | 주식회사 포스렉 | Basic castable refractory with high wear resistance |
-
1989
- 1989-12-30 JP JP1342421A patent/JPH03205368A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0535233A1 (en) * | 1991-04-16 | 1993-04-07 | Shinagawa Refractories Co., Ltd. | Unshaped alumina spinel refractory |
| EP0535233A4 (en) * | 1991-04-16 | 1993-07-28 | 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 |
| KR100446873B1 (en) * | 2001-12-24 | 2004-09-07 | 주식회사 포스렉 | Basic castable refractory with high wear resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0420871B2 (en) | ||
| JPH04119962A (en) | Magnesia-carbon refractories | |
| JPH07330447A (en) | Flow-in refractory material | |
| JP2874831B2 (en) | Refractory for pouring | |
| US4999325A (en) | Rebonded fused brick | |
| JP2002234776A (en) | Monolithic refractory composition for molten steel ladle | |
| JP4328053B2 (en) | Magnesia-spinel brick | |
| JP2005008496A (en) | Monolithic refractory | |
| JPH03205368A (en) | Castable alumina-spinel refractory | |
| JPH08175877A (en) | Castable refractory | |
| JPH0633179B2 (en) | Irregular refractory for pouring | |
| JPH06256064A (en) | Dense castable refractory low in water content and capable of being cast | |
| JPH026373A (en) | Cast amorphous refractory | |
| JP3157310B2 (en) | Refractory | |
| JPH06172044A (en) | Castable refractory of alumina spinel | |
| JP3823132B2 (en) | Amorphous refractory composition for lance pipes | |
| JP3128427B2 (en) | Alumina / Spinel amorphous refractories | |
| JPH07330450A (en) | Flow-in refractory material | |
| JPH0725668A (en) | Refractory for casting work | |
| JPH11278918A (en) | Basic refractory raw material and basic refractory, its production and metal smelting furnace and baking furnace using the same | |
| JPH0450178A (en) | Ladle-lining carbon-containing amorphous refractories | |
| JPH09183674A (en) | Monolithic refractory for flowing-in working | |
| JPH042665A (en) | Melted alumina-magnesia based composition and refractory product | |
| JP2004307293A (en) | Monolithic refractory composition | |
| JPH07110792B2 (en) | Basic amorphous refractory |