JPH0788259B2 - Basic amorphous refractory - Google Patents
Basic amorphous refractoryInfo
- Publication number
- JPH0788259B2 JPH0788259B2 JP61264240A JP26424086A JPH0788259B2 JP H0788259 B2 JPH0788259 B2 JP H0788259B2 JP 61264240 A JP61264240 A JP 61264240A JP 26424086 A JP26424086 A JP 26424086A JP H0788259 B2 JPH0788259 B2 JP H0788259B2
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- refractory
- weight
- cao
- basic
- present
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は、取鍋等の溶融金属容器の内張り材として使用
する塩基性不定形耐火物に関する。TECHNICAL FIELD The present invention relates to a basic amorphous refractory used as a lining material for a molten metal container such as a ladle.
従来の技術その問題点 近年高級鋼溶製の要求が高まるとともに、高温出鋼、取
鍋中での溶鋼の滞留時間の延長等が行なわれるようにな
り、取鍋の操業条件は、ますます苛酷化する傾向にあ
る。このため、従来取鍋等の溶融金属容器の内張り材と
して使用されてきたジルコン−シリカ系耐火物では、耐
用性が不充分となり、更に高級鋼溶製のための要求、例
えば鋼の清浄化等に充分対応できない状態が生じてい
る。Conventional technology Its problems In recent years, as the demand for high-grade steel melting has increased, high temperature tapping and extension of the residence time of the molten steel in the ladle have been carried out, and the operating conditions of the ladle are becoming more severe. Tend to change. Therefore, the zircon-silica refractory that has been conventionally used as a lining material for a molten metal container such as a ladle has insufficient durability, and the requirement for melting high-grade steel, for example, steel cleaning, etc. There is a situation in which it is not possible to cope with.
そこで、マグネシア、スピネル等の塩基性材料を主成分
とする塩基性不定形耐火物を、取鍋の内張り材として使
用する試みがなされている。該耐火物は、塩基性スラグ
に対して優れた耐食性を示すが、熱スポーリング、スラ
グの浸透に伴う構造スポーリング等によって剥離損傷を
受けやすいという問題点を有している。Therefore, attempts have been made to use a basic amorphous refractory containing a basic material such as magnesia or spinel as a main component as a lining material for a ladle. The refractory exhibits excellent corrosion resistance with respect to basic slag, but has a problem that it is susceptible to peeling damage due to thermal spalling, structural spalling accompanying slag infiltration, and the like.
上記問題点を解消するために、CaOを添加する方法が提
案されている。CaOは、スラグと接触すると、スラグ中
のSiO2、Fe2O3等と反応して2CaO・SiO2、 3CaO・SiO2、2CaO・Fe2O3等の高融点物質を生成し、ス
ラグの浸透及び構造スポーリングを抑制する。しかしな
がらCaOには、大気中の水分を吸収して粉化、崩壊（消
化）するという欠点があり、従ってCaOを含有する耐火
物も消化しやすくなっており好ましくない。In order to solve the above problems, a method of adding CaO has been proposed. CaO, upon contact with the slag to produce a high melting point material of SiO 2, etc. Fe 2 O 3 or the like reacting with 2CaO · SiO 2, 3CaO · SiO 2, 2CaO · Fe 2 O 3 in the slag, the slag Controls penetration and structural spalling. However, CaO has a drawback that it absorbs moisture in the air to be pulverized and disintegrated (digested), so that a refractory material containing CaO is also easily digested, which is not preferable.
問題点を解決するための手段 本発明者は、従来技術の問題点に鑑みて鋭意研究を重ね
た結果、CaO源として常温で水に対して安定なCaCO3を添
加し、且つ加熱によってCaCO3が分解して生成するCaOと
反応し、CaOを水に対して不活性物質とするアミンシリ
ケートを添加することによって、１）耐消化性が著るし
く改良され、並びに２）耐食性及び耐スポーリング性に
極めて優れている塩基性耐火物が得られることを見い出
し、本発明を完成した。Means for Solving the Problems The present inventor has conducted extensive studies in view of the problems of the prior art, adding CaCO 3 stable to water at room temperature as a CaO source, and CaCO 3 by heating. By reacting with CaO generated by decomposition of CaO, and adding amine silicate that makes CaO an inactive substance against water, 1) digestion resistance is remarkably improved, and 2) corrosion resistance and spalling resistance. It was found that a basic refractory having extremely excellent properties can be obtained, and the present invention was completed.
即ち、本発明は、塩基性耐火材料82〜90重量％、耐火材
料５〜10重量％及び炭酸カルシウム材料１〜10重量％か
らなる耐火物原料100重量部及びアミンシリケート0.24
〜0.8重量部（固形分換算）を含有する塩基性不定形耐
火物に係るものである。That is, the present invention comprises 100 parts by weight of a refractory raw material consisting of 82 to 90% by weight of a basic refractory material, 5 to 10% by weight of a refractory material, and 1 to 10% by weight of a calcium carbonate material, and 0.24 amine silicate.
The present invention relates to a basic amorphous refractory material containing 0.8 to 0.8 parts by weight (solid content conversion).
本発明では、耐火物原料として、塩基性耐火材料、耐火
材料及び炭酸カルシウム材料を使用する。In the present invention, a basic refractory material, a refractory material, and a calcium carbonate material are used as the refractory raw material.
塩基性材料としては、MgO含量85％以上のマグネシア質
材料を使用する。マグネシア質材料の使用量は、耐火物
原料全量の82〜90重量％程度とするのが良い。82重量％
未満では、得られる耐火物の耐食性が低く、一方90重量
％を越えると、耐熱スポーリング性及び耐構造スポーリ
ング性が悪化し、好ましくない。A magnesia material having an MgO content of 85% or more is used as the basic material. The amount of magnesia material used is preferably about 82 to 90% by weight of the total amount of refractory raw material. 82% by weight
If it is less than 90%, the corrosion resistance of the obtained refractory is low, and if it exceeds 90% by weight, the heat-resistant spalling resistance and the structural spalling resistance are deteriorated, which is not preferable.
耐火材料としては、通常耐火物に使用されるものが何れ
も使用でき（上記マグネシア質材料は除く）、例えばア
ルミナ、木節粘土、カオリン粘土等の耐火粘土、無定形
シリカ等を挙げることができる。本発明では、これら耐
火材料の１種又は２種以上を使用する。その使用量は、
耐火物原料全量の５〜10重量％程度とするのがよい。５
重量％未満では、流動性が低下し、且つ焼結性が不充分
となる。一方10重量％を越えると、耐食性が劣化し好ま
しくない。As the refractory material, any of those usually used for refractories can be used (excluding the above magnesia material), and examples thereof include refractory clay such as alumina, kibushi clay, kaolin clay, and amorphous silica. . In the present invention, one or more of these refractory materials are used. The usage is
It is preferable that the amount of the refractory raw material is about 5 to 10% by weight. 5
If it is less than wt%, the fluidity is lowered and the sinterability is insufficient. On the other hand, if it exceeds 10% by weight, the corrosion resistance deteriorates, which is not preferable.
上記塩基性耐火材料及び耐火材料（耐火粘土は除く）の
粒径は、特に制限されず適宜選択すればよいが、例えば
粒径６〜2mm程度のものが30〜60重量％程度、２〜0.074
mm程度のものが30〜70重量％程度及び0.074mm以下程度
のものが10〜40重量％程度となるように粒度調整して使
用すればよい。The particle sizes of the basic refractory material and the refractory material (excluding refractory clay) are not particularly limited and may be appropriately selected. For example, those having a particle size of 6 to 2 mm are about 30 to 60% by weight, and 2 to 0.074.
The particle size may be adjusted to about 30 to 70% by weight for mm and about 10 to 40% for 0.074 mm or less.
炭酸カルシウム材料としては、CaO含量50重量％以上、
粒径0.1mm以下の精製CaCO3または石灰石を使用する。こ
れら炭酸カルシウムは常温で水に対して安定なので、材
料の混練時及び保存時に消化することはない。炭酸カル
シウム材料の使用量は、耐火物原料全量の１〜10重量％
程度とするのがよい。１重量％未満では、スラグ等の浸
透防止効果が充分ではなく、一方10重量％を越えると、
強度及び耐食性が低くなるので好ましくない。As a calcium carbonate material, CaO content 50% by weight or more,
Use purified CaCO 3 or limestone with a particle size of 0.1 mm or less. Since these calcium carbonates are stable to water at room temperature, they do not digest during kneading and storage of the material. The amount of calcium carbonate material used is 1 to 10% by weight of the total amount of refractory raw materials.
It is good to set the degree. If it is less than 1% by weight, the effect of preventing penetration of slag is not sufficient, while if it exceeds 10% by weight,
It is not preferable because the strength and corrosion resistance are lowered.
本発明ではバインダーとして、アミンシリケートを使用
する。アミンシリケートは、加熱によって炭酸カルシウ
ムから生成するCaOと反応して2CaO・SiO2、3CaO・SiO2
等の水に不活性な高融点物質となり、CaOの消化及びス
ラグの浸透を防止する。アミンシリケートと炭酸カルシ
ウムとの反応は、CaO粒子の表面において起るため、そ
の内部にフリーのCaOが残る可能性があるが、直接空気
と接触する機会がないのでCaOが消化するおそれはな
い。本発明で使用するアミンシリケートとは、コロイド
ケイ酸（NaO・3SiO2、3H2O）のNaを、中性のアルキル基
を有するアミン（NH2CnH2n−）で置換したものである。
本発明では、コロイドケイ酸とアミンとを反応させるこ
とによって得られる約35〜40％水溶液の形態のアミンシ
リケート原液を水等で希釈し、希釈溶液中のアミンシリ
ケート濃度が８重量％程度となるように調整して使用す
る。アミンシリケート希釈溶液は、アミンシリケートの
量が固形分換算で、耐火物原料100重量部に対し0.24〜
0.8重量％程度なるようにする使用するのがよい。0.24
重量部未満では、混練作業が困難になり、一方0.8重量
部を越えると、耐火物の強度が低下し好ましくない。In the present invention, amine silicate is used as the binder. Amine silicate reacts with CaO generated from calcium carbonate by heating, and 2CaO ・ SiO 2 and 3CaO ・ SiO 2
It becomes a high melting point substance that is inert to water, and prevents the digestion of CaO and the penetration of slag. Since the reaction between amine silicate and calcium carbonate occurs on the surface of CaO particles, free CaO may remain inside the CaO particles, but since there is no opportunity for direct contact with air, CaO is not likely to be digested. The amine silicate used in the present invention is obtained by replacing Na of colloidal silicic acid (NaO.3SiO 2 , 3H 2 O) with an amine having a neutral alkyl group (NH 2 C n H 2n −). .
In the present invention, an amine silicate stock solution in the form of an approximately 35 to 40% aqueous solution obtained by reacting colloidal silicic acid with an amine is diluted with water or the like to give an amine silicate concentration of about 8% by weight in the diluted solution. To adjust and use. Amine silicate dilute solution, the amount of amine silicate is 0.24 ~ 100 parts by weight of refractory raw material in terms of solid content
It is advisable to use it in an amount of about 0.8% by weight. 0.24
If it is less than 10 parts by weight, the kneading operation becomes difficult, while if it exceeds 0.8 parts by weight, the strength of the refractory material is lowered, which is not preferable.
本発明耐火物は、上記塩基性耐火材料、耐火材料、炭酸
カルシウム材料及びアミンシリケートの所定量を混練す
ることによって製造される。The refractory material of the present invention is produced by kneading the basic refractory material, the refractory material, the calcium carbonate material and the amine silicate in a predetermined amount.
本発明耐火物を取鍋等の溶融金属容器に内張り施工する
に当っては、常法に従えばよい。例えば、本発明耐火物
を取鍋に流し込み、振動充填等により内張り施工すれば
よい。When the refractory of the present invention is lined with a molten metal container such as a ladle, a conventional method may be used. For example, the refractory material of the present invention may be poured into a ladle and lined by vibration filling or the like.
発明の効果 本発明耐火物は、高強度であり、しかも高い耐スラグ滲
透性を有し、並びに耐触性及び耐スポーリング性に優れ
ているため、苛酷な操業条件にも充分耐えることができ
る。また本発明耐火物中のCaOは、アミンシリケートの
作用によって消化することがない。EFFECTS OF THE INVENTION The refractory material of the present invention has high strength, has high slag penetration resistance, and is excellent in touch resistance and spalling resistance, and therefore can sufficiently withstand severe operating conditions. . Further, CaO in the refractory material of the present invention is not digested by the action of amine silicate.
実施例 以下に実施例及び比較例を挙げ、本発明を更に詳細に説
明する。EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples below.
実施例１〜４ 第１表に示す使用割合（重量％）の耐火物原料100重量
部及び８％アミンシリケート希釈溶液７重量部（アミン
シリケート量は、固形分換算で0.56重量部）を混練し、
本発明耐火物を製造した。得られた耐火物を、常法に従
って40×40×160mmの金型に鋳込んで成形し、110℃で10
時間乾燥して、気孔率及び曲げ強さを測定した。引続き
1500℃で３時間焼成し、再度気孔率及び曲げ強さ測定し
た。更に焼成後の耐火物に対して、耐熱スポーリング性
試験、耐構造スポーリング性試験及び溶損指数の測定を
行なった。Examples 1 to 4 100 parts by weight of a refractory raw material having the use ratio (% by weight) shown in Table 1 and 7 parts by weight of an 8% amine silicate diluted solution (the amount of amine silicate is 0.56 parts by weight in terms of solid content) were kneaded. ,
The refractory material of the present invention was manufactured. The obtained refractory material is cast into a mold of 40 × 40 × 160 mm according to a conventional method and molded, and the temperature is 110 ° C.
After drying for an hour, porosity and bending strength were measured. Continue
It was fired at 1500 ° C. for 3 hours, and the porosity and bending strength were measured again. Further, the fired refractory was subjected to a heat spalling resistance test, a structural spalling resistance test, and a melt loss index.
耐熱スポーリング性試験では、1300℃で15分間加熱後、
５分間水冷、10分間空冷という行程を１サイクルとし、
これを耐火物に対して10サイクル行なった。試験終了
後、亀裂と剥落の状態を観察し、亀裂及び剥落がない場
合を「良」、亀裂及び剥落がある場合を「不良」として
評価した。In the heat spalling resistance test, after heating at 1300 ° C for 15 minutes,
One cycle consists of 5 minutes water cooling and 10 minutes air cooling.
This was done for 10 cycles on the refractory. After the test was completed, the state of cracks and flaking was observed, and the case of no cracks and flaking was evaluated as "good", and the case of cracks and flaking as "poor".
耐構造スポーリング性試験及び溶損指数の測定では、回
転浸食法により、転炉スラグ：普通鋼（1:1）を用いて1
600℃で１時間保持し、30分間冷却するという行程を１
サイクルとし、これを３サイクル行なった。試験終了
後、亀裂の状態を観察し、亀裂がない場合を「良」、亀
裂がある場合を「不良」として評価した。また溶損指数
は、後記比較例１の試料が溶損を受けた面積を100とし
て表わした。結果を第１表に示す。In the structural spalling resistance test and the measurement of the melting loss index, 1 by using the converter slag: plain steel (1: 1) by the rotary erosion method.
Hold at 600 ℃ for 1 hour and cool for 30 minutes.
This was repeated 3 times. After completion of the test, the state of cracks was observed, and when there was no crack, it was evaluated as "good", and when there was crack, it was evaluated as "poor". In addition, the melting index was represented by setting the area of the sample of Comparative Example 1 to be melted as 100. The results are shown in Table 1.
比較例１ 炭酸カルシウムを使用しない以外は実施例と同様にして
耐火物を得た。Comparative Example 1 A refractory material was obtained in the same manner as in Example except that calcium carbonate was not used.
比較例２ 本発明で規定された使用量を越えて炭酸カルシウムを使
用する以外は実施例と同様にして耐火物を得た。Comparative Example 2 A refractory material was obtained in the same manner as in Example except that calcium carbonate was used in an amount exceeding the amount specified in the present invention.
上記比較例１及び２で得られた耐火物を実施例と同様の
性能試験に供した。結果を第１表に示す。The refractory materials obtained in Comparative Examples 1 and 2 were subjected to the same performance test as in Examples. The results are shown in Table 1.
第１表から、本発明で規定された量の炭酸カルシウムを
使用しなければ、優れた強度、耐食性及び耐スポーリン
グ性が得られないことが判る。 It can be seen from Table 1 that excellent strength, corrosion resistance and spalling resistance cannot be obtained unless the amount of calcium carbonate specified in the present invention is used.
Claims (1)
〜10重量％及び炭酸カルシウム材料１〜10重量％からな
る耐火物原料100重量部及びアミンシリケート0.24〜0.8
重量部（固形分換算）を含有する塩基性不定形耐火物。1. Basic refractory material 82 to 90% by weight, refractory material 5
~ 10 wt% and calcium carbonate material 1-10 wt% refractory raw material 100 parts by weight and amine silicate 0.24-0.8
Basic amorphous refractory containing parts by weight (solid content conversion).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61264240A JPH0788259B2 (en) | 1986-11-05 | 1986-11-05 | Basic amorphous refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61264240A JPH0788259B2 (en) | 1986-11-05 | 1986-11-05 | Basic amorphous refractory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63117976A JPS63117976A (en) | 1988-05-21 |
| JPH0788259B2 true JPH0788259B2 (en) | 1995-09-27 |
Family
ID=17400433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61264240A Expired - Lifetime JPH0788259B2 (en) | 1986-11-05 | 1986-11-05 | Basic amorphous refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788259B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RS54885B1 (en) * | 2014-04-15 | 2016-10-31 | Refractory Intellectual Property Gmbh & Co Kg | Refractory ceramic formulation, use of such a formulation and a metallurgical melting vessel |
-
1986
- 1986-11-05 JP JP61264240A patent/JPH0788259B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63117976A (en) | 1988-05-21 |
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