JPH0475191B2 - - Google Patents
Info
- Publication number
- JPH0475191B2 JPH0475191B2 JP59172613A JP17261384A JPH0475191B2 JP H0475191 B2 JPH0475191 B2 JP H0475191B2 JP 59172613 A JP59172613 A JP 59172613A JP 17261384 A JP17261384 A JP 17261384A JP H0475191 B2 JPH0475191 B2 JP H0475191B2
- Authority
- JP
- Japan
- Prior art keywords
- mgo
- present
- castable
- single crystal
- fluidity
- 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
- 239000013078 crystal Substances 0.000 claims description 13
- 238000002109 crystal growth method Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 description 10
- 230000029087 digestion Effects 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229940115440 aluminum sodium silicate Drugs 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
産業上の利用分野
本発明は、流動性、耐消化性に優れたキヤスタ
ブル耐火物に関する。
従来の技術及び問題点
キヤスタブル耐火物には、良好な流動性が必要
とされており、この流動性は、使用する原料の形
状、粒度分布、表面性状、下純物等により影響を
受ける。
従来、耐食性を向上させる為、鋳込み用或いは
流し込み用のセメント系キヤスタブル耐火物に使
用されている多結晶MgOは、強い水和性を有す
るために、凝集性が大きく、特に、形状が球でな
い多結晶MgOを添加したキヤスタブル耐火物は、
凝集し易く、流動性は悪くなる。
また、多結晶のMgOは、その粒界に水分が浸
透しやすく、それがキヤスタブル耐火物の乾燥時
に膨張するなどして消化の原因となり、水酸化マ
グネシウム等が生成され、施工体の強度が低下す
るという問題点がある。
問題点を解決するための手段
本発明者は、上記した点に鑑みて種々研究を重
ねた結果、多結晶のMgOに代えて単結晶のMgO
を使用することにより問題点を解決できることを
見出し、ここに本発明を完成した。
即ち、本発明は、結晶成長法で製造された単結
晶MgOを0.5〜30重量％含有して成るキヤスタブ
ル耐火物に係る。
本発明に於いて使用する単結晶MgOとは、通
常粒度１mm以下程度であり、MgOの粒子中に全
く粒界のないものである。そして、本発明に於い
ては、溶融法などの結晶成長法によつて製造され
た単結晶MgOを使用する必要がある。また使用
する単結晶MgOは、高純度で形状が球形のもの
が好ましい。
本発明では、単結晶MgOの使用量は、キヤス
タブル耐火物中に0.5〜30重量％とする。単結晶
MgOを使用することにより、多結晶MgOを使用
する場合に比して、キヤスタブル耐火物の流動性
が向上し、施工性が良くなる。また、単結晶であ
るために結晶粒界がなく、従つて粒界に浸透した
水分に起因するMgOの消化が起きず、焼成体は、
高強度を有する。単結晶MgOの使用量が、0.5重
量％より少ないと、施工性の向上、消化防止の効
果がなく、30重量％より多くなると耐スポーリン
グ性が低下するので好ましくない。
本発明キヤスタブル耐火物において、単結晶
MgO以外の耐火物原料としては、アルミナ、ム
ライト、スピネル、シヤモツト、ロー石、クロム
鉱、ジルコン、炭化珪素、炭素、金属粉等の従来
公知の原料を適当に組み合わせて使用でき、夫々
の使用量も従来公知の範囲で目的に合わせて適当
に選ぶことができる。
バインダーとしても従来公知のものが使用で
き、例えば、アルミナセメント、リン酸アルミニ
ウム、珪酸ソーダなどが使用できる。その他少量
の分散剤を添加することもできる。
本発明キヤスタブル耐火物の組成の例を第１表
に示す。
INDUSTRIAL APPLICATION FIELD The present invention relates to castable refractories with excellent fluidity and digestion resistance. BACKGROUND ART AND PROBLEMS Castable refractories are required to have good fluidity, and this fluidity is affected by the shape, particle size distribution, surface texture, lower impurities, etc. of the raw materials used. Conventionally, polycrystalline MgO, which has been used in cement-based castable refractories for casting or pouring to improve corrosion resistance, has strong hydration properties and has a high agglomeration property. Castable refractories added with crystalline MgO are
It tends to aggregate and has poor fluidity. In addition, polycrystalline MgO has a tendency for moisture to penetrate into its grain boundaries, which expands when drying castable refractories, causing digestion, producing magnesium hydroxide, etc., and reducing the strength of the constructed structure. There is a problem with that. Means for Solving the Problems As a result of various studies in view of the above points, the inventor of the present invention discovered that single-crystal MgO can be used instead of polycrystalline MgO.
It was discovered that the problems could be solved by using the following, and the present invention was hereby completed. That is, the present invention relates to a castable refractory containing 0.5 to 30% by weight of single crystal MgO produced by a crystal growth method. The single crystal MgO used in the present invention usually has a particle size of about 1 mm or less, and has no grain boundaries at all in the MgO particles. In the present invention, it is necessary to use single crystal MgO produced by a crystal growth method such as a melting method. Furthermore, the single crystal MgO used is preferably of high purity and spherical in shape. In the present invention, the amount of single crystal MgO used in the castable refractory is 0.5 to 30% by weight. single crystal
By using MgO, the fluidity of the castable refractory is improved and the workability is improved compared to when polycrystalline MgO is used. In addition, since it is a single crystal, there are no grain boundaries, so digestion of MgO due to moisture penetrating the grain boundaries does not occur, and the fired body
Has high strength. If the amount of single crystal MgO used is less than 0.5% by weight, there is no effect of improving workability or preventing digestion, and if it is more than 30% by weight, spalling resistance decreases, which is not preferable. In the castable refractory of the present invention, single crystal
As refractory raw materials other than MgO, conventionally known raw materials such as alumina, mullite, spinel, siyamoto, loite, chromite, zircon, silicon carbide, carbon, and metal powder can be used in appropriate combinations, and the amount of each used can be can be appropriately selected according to the purpose within a conventionally known range. Conventionally known binders can be used, such as alumina cement, aluminum phosphate, and sodium silicate. Other small amounts of dispersants may also be added. Examples of compositions of the castable refractories of the present invention are shown in Table 1.
【表】【table】
【表】
本発明キヤスタブル耐火物の施工方法としては
公知の方法のいずれによつても良く、振動鋳込
み、流し込み施工のほか吹付施工、プレパクト施
工も採用することができる。
本発明キヤスタブル耐火物のうち、特にアルミ
ナ質キヤスタブル耐火物に単結晶MgOを添加し
たものは、焼成体の強度が高く、稼動面が緻密で
あり、溶融金属、スラグ等の浸透を防止する効果
が大きい。
発明の効果
本発明に係る単結晶MgOを含有するキヤスタ
ブル耐火物は、流動性に優れているため、施工性
が良く、また耐消化性に優れているため高強度で
ある。
実施例
次に実施例を示して本発明を更に詳細に説明す
る。
実施例 １
第２表に示す組成の本発明キヤスタブル耐火物
と従来品の多結晶MgOを含有するキヤスタブル
耐火物について、水を加えて混練した場合の流動
性について試験を行なつた。試験は、JIS−Ｒ−
5201のフロー試験に準じて行ない、フロー値
（mm）を測定した。この場合、フロー値が大きい
ほど混練物の流動性は大となる。結果を第３表に
示す。[Table] The castable refractory of the present invention may be constructed by any known method, and in addition to vibration casting and pouring construction, spraying construction and prepact construction can also be employed. Among the castable refractories of the present invention, those in which single-crystal MgO is added to alumina castable refractories have a high strength fired body, a dense working surface, and are effective in preventing penetration of molten metal, slag, etc. big. Effects of the Invention The castable refractory containing single-crystal MgO according to the present invention has excellent fluidity, so it has good workability, and it has excellent digestion resistance, so it has high strength. EXAMPLES Next, the present invention will be explained in more detail with reference to Examples. Example 1 A castable refractory of the present invention having the composition shown in Table 2 and a conventional castable refractory containing polycrystalline MgO were tested for fluidity when mixed with water. The test is JIS-R-
The flow value (mm) was measured according to the flow test of 5201. In this case, the greater the flow value, the greater the fluidity of the kneaded product. The results are shown in Table 3.
【表】【table】
【表】
第３表から、本発明キヤスタブル耐火物は、従
来品と比べて流動性に優れていることが明らかで
ある。また耐消化性のテストとして110℃で24時
間乾燥後、及びオートクレーブ中で３気圧、152
℃、３時間保持後の曲げ強さの測定を行なつた。
結果を第４表に示す。[Table] From Table 3, it is clear that the castable refractories of the present invention have superior fluidity compared to conventional products. In addition, as a digestion resistance test, after drying at 110℃ for 24 hours and in an autoclave at 3 atm, 152
The bending strength was measured after holding at ℃ for 3 hours.
The results are shown in Table 4.
【表】
オートクレーブテストは、MgOの消化を極端
に進行させる条件で行なつているので、第４表か
ら、本発明キヤスタブル耐火物が耐消化性に優れ
ていることが明らかである。[Table] Since the autoclave test was conducted under conditions that allowed the digestion of MgO to proceed to an extreme extent, it is clear from Table 4 that the castable refractories of the present invention have excellent digestion resistance.
Claims (1)
30重量％含有して成るキヤスタブル耐火物。1. Single crystal MgO produced by crystal growth method is 0.5~
A castable refractory containing 30% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172613A JPS6153173A (en) | 1984-08-20 | 1984-08-20 | Castable refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172613A JPS6153173A (en) | 1984-08-20 | 1984-08-20 | Castable refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6153173A JPS6153173A (en) | 1986-03-17 |
| JPH0475191B2 true JPH0475191B2 (en) | 1992-11-30 |
Family
ID=15945119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59172613A Granted JPS6153173A (en) | 1984-08-20 | 1984-08-20 | Castable refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6153173A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE42773E1 (en) | 1992-06-17 | 2011-10-04 | Round Rock Research, Llc | Method of manufacturing an enclosed transceiver |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10109267B9 (en) * | 2001-02-26 | 2004-09-23 | Refratechnik Holding Gmbh | Offset, in particular for the production of a refractory molded body with increased alkali resistance and method for producing an offset |
| CN104338893B (en) * | 2013-07-26 | 2016-08-17 | 沈阳铸造研究所 | A kind of water-glass sand with high fluidity and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144773A (en) * | 1984-08-03 | 1986-03-04 | 鶴海合成炉材株式会社 | Kneaded-clay like basic stamp material |
-
1984
- 1984-08-20 JP JP59172613A patent/JPS6153173A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144773A (en) * | 1984-08-03 | 1986-03-04 | 鶴海合成炉材株式会社 | Kneaded-clay like basic stamp material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE42773E1 (en) | 1992-06-17 | 2011-10-04 | Round Rock Research, Llc | Method of manufacturing an enclosed transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6153173A (en) | 1986-03-17 |
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