JP2684501B2 - Casting method for irregular refractories - Google Patents
Casting method for irregular refractoriesInfo
- Publication number
- JP2684501B2 JP2684501B2 JP4352448A JP35244892A JP2684501B2 JP 2684501 B2 JP2684501 B2 JP 2684501B2 JP 4352448 A JP4352448 A JP 4352448A JP 35244892 A JP35244892 A JP 35244892A JP 2684501 B2 JP2684501 B2 JP 2684501B2
- Authority
- JP
- Japan
- Prior art keywords
- raised
- raised part
- pouring
- raising
- refractory
- 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
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】本発明は嵩上げ部分を有する流し込み耐火
物の施工方法に関するものである。The present invention relates to a method for constructing a cast refractory material having a raised portion.
【０００２】[0002]
【従来の技術】平面板状を呈する取鍋敷の湯当たり部は
転炉からの溶鋼を受ける際に、溶鋼落下距離に応じて、
大きな衝撃と磨耗作用を受けるため、他の部分より損耗
速度は２〜４倍になる。このため、湯当たり部は他の部
分より内張り耐火物の厚さを大きくするのが普通であ
る。このため、従来より、取鍋敷部の不定形流し込み施
工は事前に成形した湯当たりブロックを所定の位置に据
付けてからその周辺に行うのが一般的である。2. Description of the Related Art The hot water contact portion of a ladle with a flat plate shape receives the molten steel from the converter according to the molten steel drop distance.
Due to the large impact and wear action, the wear rate is 2 to 4 times higher than other parts. For this reason, it is usual that the hot water contact portion has a larger thickness of refractory lining than the other portions. For this reason, it has been customary in the past to perform an indeterminate pouring construction of the ladle floor portion by installing a previously formed hot water contact block at a predetermined position and then surrounding the block.
【０００３】取鍋敷の全面不定形流し込み施工におい
て、湯当たり部を他の部分より内張り耐火物の厚さを大
きくする（以下嵩上げ部と記す）方法は敷全面に相当す
る大きな枠を用意し、枠の水平レベルを出し、浮上処置
を講ずるなど必要があり、能率が悪く、枠の保管に広い
場所が必要になるなど不利な点が多く、従来は用いられ
ていなかった。In the case of casting a ladle sill on the entire surface in an irregular shape, the method of increasing the thickness of the refractory lining in the hot water contact part (hereinafter referred to as the raised part) is to prepare a large frame corresponding to the entire surface of the slab. However, it is necessary to set the horizontal level of the frame and take levitating measures, which is inefficient and requires a large space for storing the frame.
【０００４】これに代わる方法として、図９に示すよう
な事前に成形した湯当たりブロック５を所定の位置に据
付けて、敷８の他の部分１，２に流し込みを行う施工方
法が一般的に用いられているが、ブロックと流し込み材
との間に目地が生じ、この目地に溶鋼が進入し、放置す
ると湯洩れ事故につながることから、取り替え頻度を高
めるなどで対応している。このため取り替え費用や事前
製作費用が高いなどの欠点を有する。As an alternative method, a prefabricated hot water contact block 5 as shown in FIG. 9 is installed at a predetermined position and poured into the other parts 1 and 2 of the floor 8 in general. Although it is used, joints are formed between the block and the pouring material, molten steel enters into these joints, and if left unattended, there will be a molten metal leak accident, so the frequency of replacement is increased. Therefore, there are drawbacks such as high replacement cost and high pre-production cost.
【０００５】本発明は、嵩上げ部分を有し、平面板状を
呈する取鍋の敷などへの流し込み耐火物の施工方法を提
供することを目的としている。It is an object of the present invention to provide a method for constructing a refractory material which has a raised portion and which is poured into a ladle having a flat plate shape and the like.
【０００６】[0006]
【課題を解決するための手段】本発明は不定形耐火物の
流し込み施工方法において、部分的に嵩上げする施工区
域を、嵩上げ周辺部と嵩上げ下部と嵩上げ部とに区分
し、型枠を嵩上げ周辺部と嵩上げ下部の境界および嵩上
げ部に適宜使用して、 （１）嵩上げ周辺部 （２）嵩上げ下部 （３）嵩上げ部 の順序で不定形耐火物を流し込むと
共に、嵩上げ周辺部と嵩上げ下部、および嵩上げ下部と
嵩上げ部の耐火物流し込み時間間隔は乾燥後の両者の接
着強度が所定値以上になる時間内とし、嵩上げ周辺部と
嵩上げ部の耐火物流し込み時間間隔は嵩上げ部の重量に
より嵩上げ周辺部が変形しない硬化時間以上とすること
を特徴とする不定形耐火物の流し込み施工方法であり、
施工順序としては次の通り行われるものである。 （１）嵩上げ周辺部と嵩上げ下部との境界用型枠セッ
ト。 （２）嵩上げ周辺部に不定形耐火物の流し込み。 （３）嵩上げ下部への不定形耐火物の流し込み。 （４）上記（１）の型枠取り外し （５）嵩上げ用枠のセット （６）嵩上げ部への不定形耐火物の流し込み。According to the present invention, in a casting method for casting an irregular-shaped refractory, a construction area to be partially raised is divided into a raised peripheral portion, a raised lower portion, and a raised portion, and the formwork is raised around the raised portion. By appropriately using the boundary between the part and the raised part and the raised part, the irregular shaped refractory is poured in the order of (1) raised part (2) raised part (3) raised part, and the raised part and raised part, and The time interval for the refractory material to flow between the lower part of the raised area and the raised area should be within the time when the adhesive strength between the two parts is greater than the specified value after drying. Is a method of pouring the irregular shaped refractory, which is characterized by a hardening time that does not deform.
The construction order is as follows. (1) A formwork set for a boundary between a raised peripheral portion and a raised lower portion. (2) Pouring of irregular-shaped refractory into the raised peripheral area. (3) Pouring of irregularly shaped refractory into the lower part of the raised pad. (4) Removing the formwork of (1) above (5) Setting a frame for raising a building (6) Pouring an indeterminate refractory material into the raising section.
【０００７】[0007]
【作用】本発明の作用を、表１に示すアルミナスピネル
系耐火物を例にとって説明する。嵩上げ周辺部と嵩上げ
下部、および嵩上げ下部と嵩上げ部の両者の乾燥後の接
着強度を所定値以上にするための耐火物流し込み時間間
隔を、図１に示す試験方法によってもとめた。すなわち
枠に流し込み材Ａを施工し、後にＢを施工する。１１０
℃、２４Ｈｒ乾燥し、ＡとＢとの境には荷重をかけて曲
げ強度試験を行う。結果を図２に示すが、流し込み材Ａ
とＢの施工間隔時間は、曲げ強度の基準である３０Ｋｇ
／ｃｍ2 以上を確保するには２５分以内にすればよい。The operation of the present invention will be described with reference to the alumina spinel refractory material shown in Table 1 as an example. The refractory material flow-in time intervals for making the adhesive strength after drying of the raised portion and the raised portion and between the raised portion and the raised portion not less than a predetermined value were determined by the test method shown in FIG. That is, the casting material A is applied to the frame, and B is applied later. 110
After drying at 24 ° C. for 24 hours, a load is applied to the boundary between A and B to perform a bending strength test. The results are shown in Fig. 2. The casting material A
The interval between B and B is 30 kg, which is the standard of bending strength.
In order to secure a value of / cm 2 or more, it should be within 25 minutes.
【０００８】[0008]
【表１】 [Table 1]
【０００９】また、両者の境界での接着性は流し込み材
ＡとＢが境界で良く混ざり合うことも重要であり、図３
に示すタップフロー試験で両者を撹拌できる施工間隔時
間を調査した。Ｄ＝８０ｍｍ、Ｘは間隔時間振動を与え
た後の流し込み材の直径である。結果を図４に示すが両
者を撹拌できる施工間隔時間は２０分以内である。Further, it is important that the pouring materials A and B are well mixed at the boundary as to the adhesiveness at the boundary between the two.
In the tap flow test shown in Fig. 2, the working interval time during which both can be stirred was investigated. D = 80 mm, X is the diameter of the casting material after being subjected to vibration for the interval time. The results are shown in FIG. 4, and the interval time between constructions in which both can be stirred is within 20 minutes.
【００１０】以上の結果からそれぞれの部位の耐火物流
し込み時間間隔は２０分以内であれば両者の境界の接着
強度は所定値以上になる。From the above results, if the refractory material flow-in time interval of each part is within 20 minutes, the adhesive strength at the boundary between the two parts becomes a predetermined value or more.
【００１１】嵩上げ周辺部と嵩上げ部の耐火物流し込み
時間間隔は嵩上げ部の重量により嵩上げ周辺部が変形し
なくなる、つまり流動性の減退する時点が最適である。The refractory material flow-in time interval between the raised portion and the raised portion is optimal at the time when the raised portion does not deform due to the weight of the raised portion, that is, when the fluidity decreases.
【００１２】流し込み材の流動性は図３に示すタップフ
ロー試験で知ることができるが発明者の研究では流し込
み材の流動性が減退するのは図４に示すようにタップフ
ロー値が１１０のときである。このことから、嵩上げ周
辺部の施工終了から３０分以上経過した後に、嵩上げ部
の上部を施工することで、嵩上げ部分の変形は防止する
ことができる。Although the fluidity of the casting material can be known by the tap flow test shown in FIG. 3, the inventors' research shows that the fluidity of the casting material decreases when the tap flow value is 110 as shown in FIG. Is. From this, the deformation of the raised portion can be prevented by applying the upper portion of the raised portion 30 minutes or more after the completion of the work of the raised portion.
【００１３】[0013]
【実施例】以下、本発明の実施例と比較例を説明する。
以上に示した実験結果を基に、図５に示す工程で取鍋の
敷に流し込み施工を実施した。嵩上げ下部（湯当たり
部）に枠６をセットし嵩上げ周辺部に流し込み材ａを施
工する。この後、嵩上げ下部（湯当たり部）ｂを施工
し、枠６を外してａとｂの境界をバイブレーターで混ぜ
合わせる。この後、嵩上げ用枠７を取り付け終えた状態
で嵩上げ部（湯当たり部）４にｃを施工し、バイブレー
ターでｂとｃの境界を混ぜ合わせる。EXAMPLES Examples of the present invention and comparative examples will be described below.
Based on the experimental results shown above, pouring was carried out on the ladle floor in the process shown in FIG. The frame 6 is set on the lower portion (hot water contact portion) of the raised pad, and the casting material a is applied to the peripheral portion of the raised pad. After that, the raised lower part (hot water contact part) b is constructed, the frame 6 is removed, and the boundary between a and b is mixed with a vibrator. After that, c is applied to the raised portion (hot water contact portion) 4 with the raised frame 7 attached, and the boundary between b and c is mixed with a vibrator.
【００１４】それぞれの工程のタイムサイクルは図７に
示すように、嵩上げ周辺部ａと嵩上げ下部ｂおよび嵩上
げ下部ｂと嵩上げ部ｃの耐火物流し込み間隔時間は両者
の境界部の接着性が維持できる２０分以内で施工され
る。また、嵩上げ部ｃと嵩上げ周辺部ａの耐火物流し込
み間隔時間は３０分以上確保されるので、嵩上げ部ｃの
重量により嵩上げ周辺部が変形することもない。As shown in FIG. 7, the time cycle of each step is such that the refractory material inflow interval time between the raised peripheral portion a and the raised lower portion b and between the raised lower portion b and the raised portion c can maintain the adhesiveness at the boundary between them. It will be installed within 20 minutes. Further, since the refractory material flow-in interval time of the raised portion c and the raised peripheral portion a is secured for 30 minutes or more, the raised peripheral portion is not deformed by the weight of the raised portion c.
【００１５】本発明は、図８に示すような取鍋の敷の湯
当たりや連続鋳造用タンディッシュの湯当たりなどにも
用いることができる。The present invention can also be used for hot water on a ladle floor as shown in FIG. 8 and hot water for a continuous casting tundish.
【００１６】[0016]
【発明の効果】以上説明したように、本発明の全面流し
込み耐火物施工体は安価に嵩上げ施工ができ、且つ高寿
命の施工体が得られる。本発明を実施した、取鍋は湯当
たり部分の修理が少なく、また高価なブロックを不要と
することから、図９に示す従来法に対し大幅なコスト低
減を実現する効果を奏する。As described above, the entire surface cast refractory work body of the present invention can be inexpensively bulked up and has a long service life. The ladle embodying the present invention has few repairs in the hot water contact portion and does not require an expensive block, and thus has the effect of realizing a significant cost reduction over the conventional method shown in FIG.
【図１】流し込み材の曲げ試験方法を示したものであ
る。FIG. 1 shows a method of bending a cast material.
【図２】流し込み材の曲げ試験結果を示したのもであ
る。FIG. 2 also shows the bending test results of the cast material.
【図３】流し込み材のタップフロー試験法を示したもの
である。FIG. 3 shows a tap flow test method for a casting material.
【図４】流し込み材のタップフロー試験結果を示したも
のである。FIG. 4 shows a result of tap flow test of a cast material.
【図５】本発明の実施例として、取鍋の敷の流し込み施
工方法を示したものである。FIG. 5 shows a method for pouring a ladle floor as an embodiment of the present invention.
【図６】嵩上げ部を有する平面板状流し込み施工体の概
略図を示したものである。FIG. 6 is a schematic view of a flat plate-like cast product having a raised portion.
【図７】本発明の実施例の流し込み施工タイムサイクル
を示したものである。FIG. 7 shows a pouring construction time cycle according to the embodiment of the present invention.
【図８】本発明の実施例として、取鍋の断面図を示した
ものである。FIG. 8 is a sectional view of a ladle as an embodiment of the present invention.
【図９】取鍋の流し込み施工の従来法の断面図を示した
ものである。FIG. 9 is a cross-sectional view of a conventional method for pouring ladle.
１ 取鍋 ２ 壁流し込み材 ３ 敷流し込み材 ４ 嵩上げ部（湯当たり部） ５ 湯当たりブロック ６ 嵩上げ下部の流し込み材用枠 ７ 嵩上げ部の流し込み材用枠 ａ 嵩上げ周辺部の流し込み材 ｂ 嵩上げ下部の流し込み材 ｃ 嵩上げ部の流し込み材 1 Ladle 2 Wall pouring material 3 Laying pouring material 4 Raised part (hot water contact part) 5 Hot water block 6 Frame for pouring material at the lower part of the raising part 7 Frame for pouring material of the raising part a Pouring material c pouring material of raised part
Claims (1)
し込みの施工方法において、該施工区域を、嵩上げ周辺
部と嵩上げ下部と嵩上げ部とに区分し、型枠を嵩上げ周
辺部と嵩上げ下部の境界および嵩上げ部に適宜使用し
て、 （１）嵩上げ周辺部 （２）嵩上げ下部 （３）嵩上げ部 の順序で不定形耐火物を流し込むと
共に、嵩上げ周辺部と嵩上げ下部、および嵩上げ下部と
嵩上げ部の耐火物流し込み時間間隔は乾燥後の両者の接
着強度が所定値以上になる時間内とし、嵩上げ周辺部と
嵩上げ部の耐火物流し込み時間間隔は嵩上げ部の重量に
より嵩上げ周辺部が変形しない硬化時間以上とすること
を特徴とする不定形耐火物の流し込み施工方法。1. A method for pouring an irregularly shaped refractory material for partially raising a building, wherein the working area is divided into a raising peripheral portion, a raising lower portion and a raising portion, and a formwork is formed in the raising peripheral portion and the raising lower portion. By using as appropriate for the boundary and the raised part, (1) raised part, (2) raised part, (3) raised part, in addition to pouring indefinite refractory material, the raised part and raised part, and raised part and raised part The time interval for refractory physical distribution between the two parts is within a time period in which the adhesive strength between the two parts becomes greater than a predetermined value after drying, and the time interval for refractory physical distribution between the raised part and the raised part is such that the raised part does not deform due to the weight of the raised part. A method for pouring in an irregular shaped refractory, which is characterized in that it takes more than an hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4352448A JP2684501B2 (en) | 1992-12-11 | 1992-12-11 | Casting method for irregular refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4352448A JP2684501B2 (en) | 1992-12-11 | 1992-12-11 | Casting method for irregular refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06185871A JPH06185871A (en) | 1994-07-08 |
| JP2684501B2 true JP2684501B2 (en) | 1997-12-03 |
Family
ID=18424150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4352448A Expired - Lifetime JP2684501B2 (en) | 1992-12-11 | 1992-12-11 | Casting method for irregular refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2684501B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4648552B2 (en) * | 2001-02-19 | 2011-03-09 | 新日本製鐵株式会社 | Refractory lining and construction method thereof, and RH tank bottom provided with the refractory lining |
-
1992
- 1992-12-11 JP JP4352448A patent/JP2684501B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06185871A (en) | 1994-07-08 |
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