JPH08157268A - Magnesia based fire resisting particle - Google Patents
Magnesia based fire resisting particleInfo
- Publication number
- JPH08157268A JPH08157268A JP6323486A JP32348694A JPH08157268A JP H08157268 A JPH08157268 A JP H08157268A JP 6323486 A JP6323486 A JP 6323486A JP 32348694 A JP32348694 A JP 32348694A JP H08157268 A JPH08157268 A JP H08157268A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- magnesia
- content
- clinker
- raw material
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐消化性を必要とする塩
基性定形炉材及び不定形耐火物の原料として好適に使用
しうるマグネシア系耐火粒子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnesia-based refractory particle which can be suitably used as a raw material for basic shaped furnace materials and amorphous refractory materials which require digestion resistance.
【０００２】[0002]
【従来技術及びその問題点】製鋼用不定形耐火物材料で
ある塩基性吹き付け材及び流し込み材は、近年材料密度
の向上、水分比率の低減などの改良により、高温物性、
特に耐スラグ溶損性等の耐食性の向上を図ることが検討
されている。さらに高温耐食性の向上のためには、不純
物含有量のより少ない、しかも塩基度のより高い耐火物
へ変更する必要があった。2. Description of the Related Art Basic spraying materials and casting materials, which are amorphous refractory materials for steelmaking, have recently been improved in high temperature physical properties due to improvements in material density and reduction of water content.
In particular, it is being studied to improve corrosion resistance such as slag melting resistance. Further, in order to improve the high temperature corrosion resistance, it was necessary to change to a refractory material having a lower impurity content and a higher basicity.
【０００３】一方、塩基性耐火物原料であるマグネシア
クリンカー、マグネシア−カルシアクリンカー及びマグ
ネシア−スピネルクリンカーといったマグネシア系耐火
粒子は、主要構成鉱物であるペリクレースやカルシアが
空気中などの水分と反応して消化する欠点を持ってお
り、特に、既存の焼結クリンカーあるいはその破砕粒は
そのままでは流し込み材として安定して使用できるレベ
ルではなかった。このため、マグネシアクリンカーにお
いては耐消化性を改善するために、クリンカー焼成時に
ＳｉＯ2 、Ｂ2Ｏ3等の液相形成成分を添加して、マグネ
シア粒子の結晶を液相成分で被覆することが行われてい
る。しかし、この方法では耐消化性は十分とはいえず、
逆にクリンカー中にＳｉＯ2 、Ｂ2Ｏ3等の低融点不純物
が残存するために耐食性が低下するという問題がある。
また、マグネシア−カルシアクリンカー及びマグネシア
−スピネルクリンカーでは、耐消化性を大幅に改善する
ための有効な手段は見出されていなかった。On the other hand, magnesia-based refractory particles such as magnesia clinker, magnesia-calcia clinker and magnesia-spinel clinker, which are basic refractory raw materials, are digested by reaction of main constituent minerals such as periclase and calcia with air. In particular, the existing sintered clinker or its crushed particles was not at a level where it could be stably used as a casting material as it was. Therefore, in the magnesia clinker, in order to improve the digestion resistance, a liquid phase forming component such as SiO 2 or B 2 O 3 may be added at the time of firing the clinker to coat the crystals of the magnesia particles with the liquid phase component. Has been done. However, this method does not have sufficient digestion resistance,
On the contrary, there is a problem that the corrosion resistance is deteriorated because low melting point impurities such as SiO 2 and B 2 O 3 remain in the clinker.
In addition, in the magnesia-calcia clinker and the magnesia-spinel clinker, effective means for significantly improving the digestion resistance have not been found.
【０００４】したがって、不定形耐火物の高品位化のた
めには、不定形耐火物の原料であるマグネシア系耐火粒
子のＳｉＯ2 、Ｂ2Ｏ3等の低融点不純物含有量を少なく
して耐食性を向上させ、同時にマグネシア系耐火粒子の
耐消化性を、学振法４（マグネシアクリンカーの消化性
試験方法）による重量増加率０．５％以下にまで大幅に
向上させた原料の開発が課題であった。Therefore, in order to improve the quality of the amorphous refractory material, the content of low melting point impurities such as SiO 2 and B 2 O 3 in the magnesia refractory particles, which are the raw material of the amorphous refractory material, should be reduced. The challenge is to develop a raw material that improves the digestion resistance of magnesia-based refractory particles and at the same time significantly improves the weight increase rate to 0.5% or less by Gakshin method 4 (test method for digestion of magnesia clinker). there were.
【０００５】[0005]
【発明の目的】本発明の目的は、前記問題点を解決し、
ＳｉＯ2 、Ｂ2Ｏ3等の低融点不純物含有量が少なく高温
耐食性が向上しており、しかも耐消化性も大幅に向上し
ており、定形耐火物、不定形耐火物の原料粉末として、
特に流し込み材料用の原料として安定して使用が可能で
あるマグネシア系耐火粒子を提供することにある。The object of the present invention is to solve the above problems,
It has a low content of low-melting-point impurities such as SiO 2 and B 2 O 3 and has improved high-temperature corrosion resistance, as well as significantly improved digestion resistance. As a raw material powder for regular refractory and irregular refractory,
In particular, it is to provide magnesia-based refractory particles that can be stably used as a raw material for pouring materials.
【０００６】[0006]
【問題点を解決するための手段】本発明者らはマグネシ
ア系耐火粒子の消化特性を改善する方法を種々検討した
結果、マグネシア系耐火粒子を少量の有機珪素化合物で
表面処理することにより、耐消化性が大幅に向上するこ
とを見い出した。即ち、本発明は、平均粒径が５０μｍ
以上で、ＳｉＯ2 含有量が０．５重量％以下、Ｂ2Ｏ3含
有量が０．５重量％以下であり、且つ、学振法４（マグ
ネシアクリンカーの消化性試験方法）による重量増加率
が０．５％以下であることを特徴とするマグネシア系耐
火粒子に関する。As a result of various studies on the method for improving the digestion characteristics of magnesia-based refractory particles, the present inventors have found that the magnesia-based refractory particles are surface-treated with a small amount of an organic silicon compound to improve the resistance. It has been found that digestibility is greatly improved. That is, in the present invention, the average particle size is 50 μm.
As described above, the SiO 2 content is 0.5% by weight or less, the B 2 O 3 content is 0.5% by weight or less, and the weight increase rate according to Gakushin method 4 (Magnesia clinker digestibility test method) Is 0.5% or less, and relates to magnesia-based refractory particles.
【０００７】本発明のマグネシア系耐火粒子は、マグネ
シアクリンカー、マグネシア−カルシアクリンカー及び
マグネシア−スピネルクリンカーから選ばれるいずれか
一種である。マグネシアクリンカーではＭｇＯの含有量
が９８重量％以上であることが好ましい。マグネシア−
カルシアクリンカーでは、ＭｇＯ・ＣａＯの含有量が９
７重量％以上で、ＴｉＯ2 またはＺｒＯ2 の含有量が
０．４〜２．０重量％であることが好ましい。また、マ
グネシア−スピネルクリンカーでは、マグネシア及びス
ピネルの合計の含有量が９８重量％以上で、ＭｇＯの割
合が３０重量％以上であることが好ましい。The magnesia-based refractory particles of the present invention are any one selected from magnesia clinker, magnesia-calcia clinker and magnesia-spinel clinker. In the magnesia clinker, the content of MgO is preferably 98% by weight or more. Magnesia
Calcia clinker has a MgO / CaO content of 9
It is preferable that the content of TiO 2 or ZrO 2 is 7% by weight or more and 0.4 to 2.0% by weight. Further, in the magnesia-spinel clinker, it is preferable that the total content of magnesia and spinel is 98% by weight or more and the proportion of MgO is 30% by weight or more.
【０００８】本発明のマグネシア系耐火粒子は平均粒径
が５０μｍ以上である。特に、耐消化性の面から、１７
５０℃以上の温度で焼成して得られる、いわゆる高温焼
成クリンカーであることが望ましい。また、ＳｉＯ2 含
有量が０．５重量％以下、Ｂ2Ｏ3含有量が０．５重量％
以下、好ましくは０．１重量％以下であるので、耐火物
にした場合のスラグ等への耐食性が優れている。本発明
のマグネシア系耐火粒子は、有機珪素化合物で表面処理
されているので、学振法４（マグネシアクリンカーの消
化性試験方法）による重量増加率が０．５％以下と耐消
化性が向上している。特に、マグネシア系耐火粒子が、
マグネシアクリンカーの場合には、重量増加率が０．１
重量％以下、特に好ましくは０．０３重量％以下、マグ
ネシア−カルシアクリンカー及びマグネシア−スピネル
クリンカーの場合には、重量増加率が０．１重量％以下
と著しく向上している。これは、有機珪素化合物で表面
処理することにより、マグネシア系耐火粒子の粒子表面
が有機珪素化合物またはシリカの被膜で被覆されるため
と考えられる。The magnesia refractory particles of the present invention have an average particle size of 50 μm or more. Especially from the viewpoint of digestion resistance, 17
A so-called high temperature baking clinker obtained by baking at a temperature of 50 ° C. or higher is desirable. Further, the SiO 2 content is 0.5% by weight or less, and the B 2 O 3 content is 0.5% by weight.
Hereafter, since it is preferably 0.1% by weight or less, the corrosion resistance to slag and the like when it is made into a refractory is excellent. Since the magnesia-based refractory particles of the present invention are surface-treated with an organosilicon compound, the weight increase rate according to Gakushin method 4 (test method for digestion of magnesia clinker) is 0.5% or less, which improves digestion resistance. ing. In particular, magnesia-based refractory particles
In the case of magnesia clinker, the weight gain rate is 0.1
In the case of magnesia-calcia clinker and magnesia-spinel clinker, the weight increase rate is significantly improved to 0.1% by weight or less. It is considered that this is because the surface treatment of the magnesia-based refractory particles is covered with the organic silicon compound or silica film by the surface treatment with the organic silicon compound.
【０００９】このようなマグネシア系耐火粒子は、平均
粒径５０μｍ以上のマグネシア系耐火粒子を有機珪素化
合物で表面処理することにより得られる。有機珪素化合
物としては、シランカップリング剤、アルコキシシラ
ン、シリコーン、シリル化剤等が挙げられる。シランカ
ップリング剤としては、ビニルトリクロルシラン、ビニ
ルトリエトキシシラン、ビニルトリメトキシシラン、ビ
ニルトリス（βメトキシエトキシ）シラン、γ−（メタ
クリロキシプロピル）トリメトキシシラン、γ−アミノ
プロピルトリエトキシシラン、γ−メルカプトプロピル
トリメトキシシランなどが挙げられる。アルコキシシラ
ンとしては、テトラエトキシシラン、テトラメトキシシ
ラン、メチルトリエトキシシランなどが挙げられる。シ
リコーンとしては、メチル水素シリコーンオイル、ジメ
チルシリコーンオイルなどが挙げられる。シリル化剤と
しては、トリメチルクロロシラン、ヘキサメチルジシラ
ザンなどが挙げられる。Such magnesia-based refractory particles can be obtained by surface-treating magnesia-based refractory particles having an average particle size of 50 μm or more with an organic silicon compound. Examples of the organosilicon compound include silane coupling agents, alkoxysilanes, silicones, silylating agents and the like. As the silane coupling agent, vinyltrichlorosilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (βmethoxyethoxy) silane, γ- (methacryloxypropyl) trimethoxysilane, γ-aminopropyltriethoxysilane, γ- Examples thereof include mercaptopropyltrimethoxysilane. Examples of the alkoxysilane include tetraethoxysilane, tetramethoxysilane, and methyltriethoxysilane. Examples of the silicone include methyl hydrogen silicone oil and dimethyl silicone oil. Examples of the silylating agent include trimethylchlorosilane and hexamethyldisilazane.
【００１０】マグネシア系耐火粒子に対する有機珪素化
合物の添加量は、ＳｉＯ2 換算で、マグネシア系耐火粒
子が、マグネシアクリンカーの場合には、０．００１〜
１．０重量％、好ましくは０．００５〜０．５重量％、
マグネシア−カルシアクリンカー及びマグネシア−スピ
ネルクリンカーの場合には、０．０１〜１．０重量％、
好ましくは０．０５〜０．５重量％である。添加量が前
記範囲の下限よりも少ないと耐消化性の向上効果が認め
られず、また、上限よりも多くしても多くしたことによ
る効果はなく、逆に不純物として望ましくないＳｉＯ2
成分の量が多くなるので好ましくない。[0010] The addition amount of the organic silicon compound to the magnesia-based refractory particles, in terms of SiO 2, magnesia-based refractory particles, in the case of magnesia clinker, 0.001
1.0% by weight, preferably 0.005-0.5% by weight,
In the case of magnesia-calcia clinker and magnesia-spinel clinker, 0.01-1.0% by weight,
It is preferably 0.05 to 0.5% by weight. Amount can not be observed the effect of improving the digestion resistant and less than the lower limit of the range, also, no effect due to the many and more than the upper limit, SiO 2 undesirable as impurities in the opposite
It is not preferable because the amount of the component increases.
【００１１】表面処理の方法としては、マグネシア系耐
火粒子に有機珪素化合物をそのまま、あるいは有機溶媒
などに溶解あるいは分散して添加混合した後、必要によ
り８０〜２００℃の範囲で有機珪素化合物が分解しない
温度で加熱処理する。これにより、マグネシア系耐火粒
子の粒子表面が有機珪素化合物で被覆されるので、耐消
化性が向上する。有機珪素化合物の被覆量は、マグネシ
ア系耐火粒子に対し、ＳｉＯ2 換算で、マグネシアクリ
ンカーの場合には、０．００１〜１．０重量％、好まし
くは０．００５〜０．５重量％、マグネシア−カルシア
クリンカー及びマグネシア−スピネルクリンカーの場合
には、０．０１〜１．０重量％、好ましくは０．０５〜
０．５重量％である。本発明においては、前記有機珪素
化合物で被覆されたマグネシア系耐火粒子を、さらに２
００〜１０００℃、好ましくは３５０〜６００℃で加熱
処理してもよい。この加熱処理により、有機珪素化合物
が分解し、マグネシア系耐火粒子の粒子表面がシリカの
被膜で被覆される。シリカの被覆量は、マグネシア系耐
火粒子に対し、ＳｉＯ2 換算で、マグネシアクリンカー
の場合には、０．０００７〜０．７重量％、好ましくは
０．００３５〜０．３５重量％、マグネシア−カルシア
クリンカー及びマグネシア−スピネルクリンカーの場合
には、０．００７〜０．７重量％、好ましくは０．０３
５〜０．３５重量％である。As the surface treatment method, the magnesia-based refractory particles may be mixed with the organosilicon compound as it is, or may be dissolved or dispersed in an organic solvent and added and mixed. Heat treatment at a temperature that does not. As a result, since the particle surface of the magnesia-based refractory particles is coated with the organosilicon compound, the digestion resistance is improved. The coating amount of the organosilicon compound is 0.001 to 1.0% by weight, preferably 0.005 to 0.5% by weight, in the case of magnesia clinker, calculated as SiO 2 with respect to the magnesia-based refractory particles. In the case of calcia clinker and magnesia-spinel clinker, 0.01-1.0% by weight, preferably 0.05-
It is 0.5% by weight. In the present invention, magnesia-based refractory particles coated with the organosilicon compound are further added to
You may heat-process at 00-1000 degreeC, preferably 350-600 degreeC. By this heat treatment, the organosilicon compound is decomposed, and the particle surface of the magnesia-based refractory particles is covered with the silica film. The coating amount of silica is 0.0007 to 0.7% by weight, preferably 0.0035 to 0.35% by weight, in the case of magnesia clinker, in terms of SiO 2 with respect to magnesia-based refractory particles, and magnesia-calcia. In the case of clinker and magnesia-spinel clinker, 0.007 to 0.7% by weight, preferably 0.03.
It is 5 to 0.35% by weight.
【００１２】[0012]
【実施例】以下、実施例及び比較例を示して本発明をさ
らに詳しく説明する。なお、耐消化性の評価は、学振法
４（マグネシアクリンカーの消化性試験方法）に従って
行った。 実施例１ ロータリーキルンで焼成したＣａＯ含有量０．５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
２重量％のマグネシアクリンカーの３〜１ｍｍ粒度を原
料とし、これにメチル水素シリコーンオイル０．０５重
量％を添加した後、１０ｌの回転ドラム式混合器中で２
分間攪拌した。次に１２０℃のエアーバス中で３時間保
持した。得られたクリンカーの耐消化性は重量増加率で
原料の２．０％から０．０３％と大幅に向上した。EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. The digestion resistance was evaluated according to Gakushin method 4 (test method for digestion of magnesia clinker). Example 1 CaO content 0.5% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0 which was calcined in a rotary kiln
2% by weight of magnesia clinker having a particle size of 3 to 1 mm was used as a raw material, and 0.05% by weight of methylhydrogen silicone oil was added to the raw material.
Stir for minutes. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was significantly improved from 2.0% of the raw material to 0.03% in terms of weight increase rate.
【００１３】実施例２ ロータリーキルンで焼成したＣａＯ含有量２７重量％、
ＴｉＯ2 含有量０．８重量％、ＳｉＯ2 含有量０．２重
量％、Ｂ2Ｏ3含有量０．０４重量％のマグネシア−カル
シアクリンカーの３〜１ｍｍ粒度を原料とし、これにメ
チル水素シリコーンオイル０．２重量％を添加した後、
１０ｌの回転ドラム式混合器中で２分間攪拌した。次に
１２０℃のエアーバス中で３時間保持した。得られたク
リンカーの耐消化性は重量増加率で原料の４．０％から
０．０９％と大幅に向上した。Example 2 CaO content of 27% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-calcia clinker having a TiO 2 content of 0.8% by weight, a SiO 2 content of 0.2% by weight, and a B 2 O 3 content of 0.04% by weight was used as a raw material, and a methyl hydrogen silicone was added thereto. After adding 0.2% by weight of oil,
Stir for 2 minutes in a 10 l rotating drum mixer. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was significantly improved from 4.0% of the raw material to 0.09% in terms of weight increase rate.
【００１４】実施例３ ロータリーキルンで焼成したＡｌ2Ｏ3含有量４５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
５重量％のマグネシア−スピネルクリンカーの３〜１ｍ
ｍ粒度を原料とし、これにメチル水素シリコーンオイル
０．２重量％を添加した後、１０ｌの回転ドラム式混合
器中で２分間攪拌した。次に１２０℃のエアーバス中で
３時間保持した。得られたクリンカーの耐消化性は重量
増加率で原料の１．０％から０．０４％と大幅に向上し
た。Example 3 Al 2 O 3 content 45% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0 which was calcined in a rotary kiln
3-1 m of 5% by weight magnesia-spinel clinker
Using m particle size as a raw material, 0.2% by weight of methyl hydrogen silicone oil was added thereto, and the mixture was stirred for 2 minutes in a 10 l rotary drum type mixer. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was significantly improved from 1.0% of the raw material to 0.04% in terms of weight increase rate.
【００１５】実施例４ ロータリーキルンで焼成したＣａＯ含有量１．２重量
％、ＳｉＯ2 含有量０．３重量％、Ｂ2Ｏ3含有量０．０
６重量％のマグネシアクリンカーの３〜１ｍｍ粒度を原
料とし、これにメチル水素シリコーンオイル０．０２重
量％を添加した後、１０ｌの回転ドラム式混合器中で２
分間攪拌した。次に４５０℃の電気炉中で０．５時間保
持した。得られたクリンカーの耐消化性は重量増加率で
原料の３．０％から０．０２％と大幅に向上した。Example 4 1.2% by weight of CaO, 0.3% by weight of SiO 2 content, 0.0% by weight of B 2 O 3 calcined in a rotary kiln
6% by weight of magnesia clinker having a particle size of 3 to 1 mm was used as a raw material, and 0.02% by weight of methylhydrogen silicone oil was added to the raw material, followed by 2 in a 10 l rotary drum mixer.
Stir for minutes. Next, it was held in an electric furnace at 450 ° C. for 0.5 hour. The digestion resistance of the obtained clinker was significantly improved from 3.0% of the raw material to 0.02% in terms of weight increase rate.
【００１６】実施例５ ロータリーキルンで焼成したＣａＯ含有量１０重量％、
ＴｉＯ2 含有量０．６重量％、ＳｉＯ2 含有量０．２重
量％、Ｂ2Ｏ3含有量０．０２重量％のマグネシア−カル
シアクリンカーの３〜１ｍｍ粒度を原料とし、これにメ
チル水素シリコーンオイル０．２重量％を添加した後、
１０ｌの回転ドラム式混合器中で２分間攪拌した。次に
４５０℃の電気炉中で０．５時間保持した。得られたク
リンカーの耐消化性は重量増加率で原料の３．０％から
０．０５％と大幅に向上した。Example 5 CaO content of 10% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-calcia clinker having a TiO 2 content of 0.6% by weight, a SiO 2 content of 0.2% by weight, and a B 2 O 3 content of 0.02% by weight is used as a raw material, and a methyl hydrogen silicone is added thereto. After adding 0.2% by weight of oil,
Stir for 2 minutes in a 10 l rotating drum mixer. Next, it was held in an electric furnace at 450 ° C. for 0.5 hour. The digestion resistance of the obtained clinker was greatly improved from 3.0% of the raw material to 0.05% in terms of weight increase rate.
【００１７】実施例６ ロータリーキルンで焼成したＡｌ2Ｏ3含有量９重量％、
ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０２重
量％のマグネシア−スピネルクリンカーの３〜１ｍｍ粒
度を原料とし、これにメチル水素シリコーンオイル０．
２重量％を添加した後、１０ｌの回転ドラム式混合器中
で２分間攪拌した。次に４５０℃の電気炉中で０．５時
間保持した。得られたクリンカーの耐消化性は重量増加
率で原料の３．０％から０．０４％と大幅に向上した。Example 6 Al 2 O 3 content of 9% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-spinel clinker having a SiO 2 content of 0.2% by weight and a B 2 O 3 content of 0.02% by weight was used as a raw material, and methyl hydrogen silicone oil 0.1.
After adding 2% by weight, the mixture was stirred for 2 minutes in a 10 l rotary drum mixer. Next, it was held in an electric furnace at 450 ° C. for 0.5 hour. The digestion resistance of the obtained clinker was greatly improved from 3.0% of the raw material to 0.04% in terms of weight increase rate.
【００１８】実施例７ ロータリーキルンで焼成したＣａＯ含有量０．５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
２重量％のマグネシアクリンカーの３〜１ｍｍ粒度を原
料とし、これにメチル水素シリコーンオイル０．０２重
量％を添加した後、１０ｌの回転ドラム式混合器中で２
分間攪拌した。得られたクリンカーの耐消化性は重量増
加率で原料の２．０％から０．０４％と大幅に向上し
た。Example 7 CaO content 0.5% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0
2% by weight of magnesia clinker having a particle size of 3 to 1 mm was used as a raw material, and 0.02% by weight of methylhydrogen silicone oil was added to the raw material, followed by 2 in a 10 l rotary drum mixer.
Stir for minutes. The digestion resistance of the obtained clinker was significantly improved from 2.0% of the raw material to 0.04% in terms of weight increase rate.
【００１９】実施例８ ロータリーキルンで焼成したＣａＯ含有量２７重量％、
ＴｉＯ2 含有量０．８重量％、ＳｉＯ2 含有量０．２重
量％、Ｂ2Ｏ3含有量０．０２重量％のマグネシア−カル
シアクリンカーの３〜１ｍｍ粒度を原料とし、これにメ
チル水素シリコーンオイル０．２重量％を添加した後、
１０ｌの回転ドラム式混合器中で２分間攪拌した。得ら
れたクリンカーの耐消化性は重量増加率で原料の４．０
％から０．１０％と大幅に向上した。Example 8 CaO content of 27% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-calcia clinker having a TiO 2 content of 0.8% by weight, a SiO 2 content of 0.2% by weight, and a B 2 O 3 content of 0.02% by weight is used as a raw material, and a methyl hydrogen silicone is added thereto. After adding 0.2% by weight of oil,
Stir for 2 minutes in a 10 l rotating drum mixer. The digestion resistance of the obtained clinker was 4.0% of that of the raw material in terms of weight increase rate.
% To 0.10%.
【００２０】実施例９ ロータリーキルンで焼成したＡｌ2Ｏ3含有量４５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
２重量％のマグネシア−スピネルクリンカーの３〜１ｍ
ｍ粒度を原料とし、これにメチル水素シリコーンオイル
０．２重量％を添加した後、１０ｌの回転ドラム式混合
器中で２分間攪拌した。得られたクリンカーの耐消化性
は重量増加率で原料の１．０％から０．０５％と大幅に
向上した。Example 9 Al 2 O 3 content 45% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0
3 to 1 m of 2% by weight magnesia-spinel clinker
Using m particle size as a raw material, 0.2% by weight of methyl hydrogen silicone oil was added thereto, and the mixture was stirred for 2 minutes in a 10 l rotary drum type mixer. The digestion resistance of the obtained clinker was significantly improved from 1.0% of the raw material to 0.05% in terms of weight increase rate.
【００２１】実施例１０ ロータリーキルンで焼成したＣａＯ含有量０．５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
２重量％のマグネシアクリンカーの３〜１ｍｍ粒度を原
料とし、これにメチル水素シリコーンオイル０．０１重
量％をエタノール３重量％に溶解して添加した後、１０
ｌの回転ドラム式混合器中で２分間攪拌した。次に１２
０℃のエアーバス中で３時間保持した。得られたクリン
カーの耐消化性は重量増加率で原料の２．０％から０．
０３％と大幅に向上した。Example 10 CaO content 0.5% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0 which was calcined in a rotary kiln
2% by weight of magnesia clinker having a particle size of 3 to 1 mm was used as a raw material, and 0.01% by weight of methylhydrogen silicone oil was dissolved in 3% by weight of ethanol and added thereto.
It was stirred for 2 minutes in a rotary drum mixer of 1 l. Next 12
It was kept in an air bath at 0 ° C. for 3 hours. The digestion resistance of the obtained clinker is from 2.0% of the raw material in terms of weight increase rate to 0.1.
It improved significantly to 03%.
【００２２】実施例１１ ロータリーキルンで焼成したＣａＯ含有量２７重量％、
ＴｉＯ2 含有量０．８重量％、ＳｉＯ2 含有量０．２重
量％、Ｂ2Ｏ3含有量０．０４重量％のマグネシア−カル
シアクリンカーの３〜１ｍｍ粒度を原料とし、これにメ
チル水素シリコーンオイル０．１０重量％をエタノール
３重量％に溶解して添加した後、１０ｌの回転ドラム式
混合器中で２分間攪拌した。次に１２０℃のエアーバス
中で３時間保持した。得られたクリンカーの耐消化性は
重量増加率で原料の４．０％から０．０９％と大幅に向
上した。Example 11 CaO content of 27% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-calcia clinker having a TiO 2 content of 0.8% by weight, a SiO 2 content of 0.2% by weight, and a B 2 O 3 content of 0.04% by weight was used as a raw material, and a methyl hydrogen silicone was added thereto. 0.10% by weight of oil was dissolved in 3% by weight of ethanol and added, followed by stirring for 2 minutes in a 10 l rotary drum mixer. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was significantly improved from 4.0% of the raw material to 0.09% in terms of weight increase rate.
【００２３】実施例１２ ロータリーキルンで焼成したＡｌ2Ｏ3含有量４５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
５重量％のマグネシア−スピネルクリンカーの３〜１ｍ
ｍ粒度を原料とし、これにメチル水素シリコーンオイル
０．１０重量％をエタノール３重量％に溶解して添加し
た後、１０ｌの回転ドラム式混合器中で２分間攪拌し
た。次に１２０℃のエアーバス中で３時間保持した。得
られたクリンカーの耐消化性は重量増加率で原料の１．
０％から０．０４％と大幅に向上した。Example 12 Al 2 O 3 content 45% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0 after calcined in a rotary kiln
3-1 m of 5% by weight magnesia-spinel clinker
Using m particle size as a raw material, 0.10% by weight of methyl hydrogen silicone oil dissolved in 3% by weight of ethanol was added, and the mixture was stirred for 2 minutes in a 10 l rotary drum type mixer. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was 1.
Significant improvement from 0% to 0.04%.
【００２４】比較例１ ロータリーキルンで焼成したＣａＯ含有量０．５重量
％、ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０
２重量％のマグネシアクリンカーの３〜１ｍｍ粒度を原
料とし、これにメチル水素シリコーンオイル０．０００
５重量％をエタノール３重量％に溶解して添加した後、
１０ｌの回転ドラム式混合器中で２分間攪拌した。次に
１２０℃のエアーバス中で３時間保持した。得られたク
リンカーの耐消化性は重量増加率で原料の２．０％と比
べて１．５％とあまり効果はなかった。Comparative Example 1 CaO content 0.5% by weight, SiO 2 content 0.2% by weight, B 2 O 3 content 0.0
2% by weight of magnesia clinker having a particle size of 3 to 1 mm was used as a raw material, and methyl hydrogen silicone oil 0.000 was added thereto.
After dissolving 5 wt% in 3 wt% ethanol and adding,
Stir for 2 minutes in a 10 l rotating drum mixer. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was 1.5% in terms of weight increase rate compared with 2.0% of the raw material, which was not very effective.
【００２５】比較例２ ロータリーキルンで焼成したＣａＯ含有量２７重量％、
ＴｉＯ2 含有量０．８重量％、ＳｉＯ2 含有量０．２重
量％、Ｂ2Ｏ3含有量０．０４重量％のマグネシア−カル
シアクリンカーの３〜１ｍｍ粒度を原料とし、これにメ
チル水素シリコーンオイル０．００１重量％をエタノー
ル３重量％に溶解して添加した後、１０ｌの回転ドラム
式混合器中で２分間攪拌した。次に１２０℃のエアーバ
ス中で３時間保持した。得られたクリンカーの耐消化性
は重量増加率で原料の４．０％から３．０％とあまり効
果はなかった。Comparative Example 2 CaO content of 27% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-calcia clinker having a TiO 2 content of 0.8% by weight, a SiO 2 content of 0.2% by weight, and a B 2 O 3 content of 0.04% by weight was used as a raw material, and a methyl hydrogen silicone was added thereto. An oil (0.001% by weight) was dissolved in ethanol (3% by weight), added, and then stirred in a 10 l rotary drum mixer for 2 minutes. Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker was 4.0% to 3.0% of the raw material in terms of weight increase rate, which was not very effective.
【００２６】比較例３ ロータリーキルンで焼成したＡｌ2Ｏ3含有量９重量％、
ＳｉＯ2 含有量０．２重量％、Ｂ2Ｏ3含有量０．０２重
量％のマグネシア−スピネルクリンカーの３〜１ｍｍ粒
度を原料とし、これにメチル水素シリコーンオイル０．
００１重量％をエタノール３重量％に溶解して添加した
後、１０ｌの回転ドラム式混合器中で２分間攪拌した。
次に１２０℃のエアーバス中で３時間保持した。得られ
たクリンカーの耐消化性は重量増加率で原料の３．０％
から２．５％とあまり効果はなかった。Comparative Example 3 Al 2 O 3 content of 9% by weight calcined in a rotary kiln,
A 3 to 1 mm particle size of magnesia-spinel clinker having a SiO 2 content of 0.2% by weight and a B 2 O 3 content of 0.02% by weight was used as a raw material, and methyl hydrogen silicone oil 0.1.
001% by weight was dissolved in 3% by weight of ethanol and added, and the mixture was stirred for 2 minutes in a 10 l rotary drum mixer.
Next, it was kept in an air bath at 120 ° C. for 3 hours. The digestion resistance of the obtained clinker is 3.0% of the weight increase rate of the raw material.
Was 2.5%, which was not very effective.
【００２７】[0027]
【発明の効果】本発明のマグネシア系耐火粒子は、Ｓｉ
Ｏ2 、Ｂ2Ｏ3等の不純物含有量が少なく高温耐食性が向
上しており、しかも耐消化性も大幅に向上していること
から、定型耐火物、不定形耐火物の原料として、特に塩
基性流し込み材料の粉末原料として極めて有用である。The magnesia-based refractory particles of the present invention are made of Si
Since it has a low content of impurities such as O 2 and B 2 O 3 and has improved high-temperature corrosion resistance, and also greatly improved digestion resistance, it is particularly useful as a raw material for standard refractory materials and amorphous refractory materials. It is extremely useful as a powder raw material for a pourable material.
Claims (3)
有量が０．５重量％以下、Ｂ2Ｏ3含有量が０．５重量％
以下であり、且つ、学振法４（マグネシアクリンカーの
消化性試験方法）による重量増加率が０．５％以下であ
ることを特徴とするマグネシア系耐火粒子。1. An average particle size of 50 μm or more, a SiO 2 content of 0.5% by weight or less, and a B 2 O 3 content of 0.5% by weight.
The magnesia-based refractory particles having a weight increase rate of 0.5% or less according to Gakushin method 4 (test method for digestibility of magnesia clinker).
いることを特徴とする請求項１記載のマグネシア系耐火
粒子。2. The magnesia-based refractory particle according to claim 1, wherein the particle surface is coated with an organosilicon compound.
ることを特徴とする請求項１記載のマグネシア系耐火粒
子。3. The magnesia-based refractory particle according to claim 1, wherein the surface of the particle is covered with a silica film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32348694A JP4143135B2 (en) | 1994-12-01 | 1994-12-01 | Magnesia refractory particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32348694A JP4143135B2 (en) | 1994-12-01 | 1994-12-01 | Magnesia refractory particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08157268A true JPH08157268A (en) | 1996-06-18 |
| JP4143135B2 JP4143135B2 (en) | 2008-09-03 |
Family
ID=18155234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32348694A Expired - Lifetime JP4143135B2 (en) | 1994-12-01 | 1994-12-01 | Magnesia refractory particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4143135B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001068555A1 (en) * | 2000-03-14 | 2001-09-20 | Krosakiharima Coporation | Monolithic refractory for waste pyrolysis furnace and waste pyrolysis furnace using the same |
| JP2007217230A (en) * | 2006-02-16 | 2007-08-30 | Ebara Corp | Inorganic and organic bonding powder for sintering and molding, and pump part and pump device |
| WO2023157683A1 (en) * | 2022-02-17 | 2023-08-24 | デンカ株式会社 | Coated magnesia particle, filler for heat dissipation material, resin composition, and method for producing coated magnesia particle |
-
1994
- 1994-12-01 JP JP32348694A patent/JP4143135B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001068555A1 (en) * | 2000-03-14 | 2001-09-20 | Krosakiharima Coporation | Monolithic refractory for waste pyrolysis furnace and waste pyrolysis furnace using the same |
| JP2007217230A (en) * | 2006-02-16 | 2007-08-30 | Ebara Corp | Inorganic and organic bonding powder for sintering and molding, and pump part and pump device |
| WO2023157683A1 (en) * | 2022-02-17 | 2023-08-24 | デンカ株式会社 | Coated magnesia particle, filler for heat dissipation material, resin composition, and method for producing coated magnesia particle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4143135B2 (en) | 2008-09-03 |
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