JPH0320589A - Lining structure of refractory wall - Google Patents
Lining structure of refractory wallInfo
- Publication number
- JPH0320589A JPH0320589A JP15497689A JP15497689A JPH0320589A JP H0320589 A JPH0320589 A JP H0320589A JP 15497689 A JP15497689 A JP 15497689A JP 15497689 A JP15497689 A JP 15497689A JP H0320589 A JPH0320589 A JP H0320589A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- indefinite
- heat insulating
- surface side
- refractory 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 72
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000011823 monolithic refractory Substances 0.000 claims description 28
- 230000009970 fire resistant effect Effects 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007935 neutral effect Effects 0.000 abstract description 4
- 239000011820 acidic refractory Substances 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000011821 neutral refractory Substances 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract 9
- 239000007921 spray Substances 0.000 description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 14
- 238000005507 spraying Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229910052845 zircon Inorganic materials 0.000 description 7
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- -1 basic Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 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 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate 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
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、取鍋の内壁等の耐火壁のライニング構造に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lining structure for a fireproof wall such as an inner wall of a ladle.
従来の技術
取鍋やタンディシュ等の溶鋼容器の内壁を不定形耐火材
で形戒することが、近年益々盛んになっている。その施
工法も、スリンガーによる投射法に始まり、スタンプ法
、流し込み法、振動施工法などの多岐にわたっており、
さらに吹付工法によるワーキングライニングを形戊する
方法も開発されている．また、施工される材質も、ジル
コン質を中心に高アルξナ質、塩基性、アルミナ・スビ
ネル質など多種類にわたっている．これらの材質は、ろ
う石質やシャモット譬れんがの永久張りれんがの上にジ
ルコン質や高アルミナ質れんがのセーフティライニング
を施工し、さらにその上に不定形耐火材を流し込み施工
あるいは振動施工されるのが通常である。BACKGROUND OF THE INVENTION In recent years, it has become increasingly popular to line the inner walls of molten steel containers such as ladles and tundishes with monolithic refractory materials. The construction methods range from the projection method using a slinger to the stamp method, pouring method, and vibration construction method.
Furthermore, a method of shaping the working lining using the spraying method has also been developed. In addition, there are many types of materials used for construction, including zircon, high alumina, basic, and alumina/subinel. These materials are constructed by constructing a safety lining made of zircon or high alumina bricks on top of permanently laid bricks made of waxite or chamotte bricks, and then pouring monolithic refractory material on top of that or vibrating construction. is normal.
発明が解決しようとする課題
しかし、永久張りやセーフティライニングは熱損失が大
きく、さらに不定形耐火材のライニングが高アルミナ質
やアルミナ・スピネル質あるいは塩基性のものとなると
熱損失がさらに増大し、転炉の出鋼温度を上げるなどの
対応が必要となるものであった。Problems to be Solved by the Invention However, permanent tension and safety linings have a large heat loss, and if the lining made of monolithic refractory material is made of high alumina, alumina/spinel, or basic, the heat loss will further increase. Measures such as increasing the tapping temperature of the converter were required.
そのため、従来は耐火壁の背面側に断熱れんがあるいは
セラミックシ一トを施工するなどの試みがなされている
が、前者は省ノ〕化の面や価格の面で問題があり、また
後者は価格の面で問題がある．課題を解決するための手
段
本発明は上記のような点に鑑みたもので、上記の課題を
解決するために、耐火壁のライニング部の稼働面側を耐
火性不定形耐火材で、背面側を断熱性不定形耐火材で形
成し、上記ライニング部の稼働面側と背面側との中間部
を耐火性と断熱性の不定形耐火材を混合した耐火断熱混
合不定形耐火材で形戊したことを特徴とする耐火壁のラ
イニング構造を提供するにある．
作用
本発明によれば、耐火壁のライニング部をその稼働面側
に形成の耐火性不定形耐火材によって、所要の耐熱性を
確保できて稼働できる．また、ライニング部の背面側に
形戒の断熱性不定形耐火材によって、耐火壁の熱損失の
防止がはかれて省エネルギー化をはかれる．そして、上
記ライニング部の稼働面側と背面側との中間部に形戒の
耐火性と断熱性の不定形耐火材の混合層によって、稼働
面側と背面側との不定形耐火材がそれぞれ境界部で緊密
に連結し、境界部から剥離することが防止できて耐久性
よく操業できる．
実施例
以下、本発明を実施例にもとづいて説明する．添付図は
、本発明の一実施例である．取鍋等の溶融金属容器の耐
火壁１の鉄皮２を被覆したライニング部３には、図のよ
うに内側の稼働面側に耐火性不定形耐火材４を、外側の
背面側に断熱性不定形耐火材５を、その中間部に耐火性
の不定形耐火材と断熱性の不定形耐火材を混合した耐火
断熱混合不定形耐火材６を一体的に積層して構戒してい
る．上記稼働面側の耐火性不定形耐火材４としては、た
とえば中性あるいは酸性の耐火質吹付材を使用している
．具体的には、ろう石質、シャモット質、高アルミナ質
、アルξナ質、ジルコン質、スビネル質の吹付材であり
、これらを単独で吹付けたり、必要に応じて２種以上の
材料を多層に吹付けることができる．これらの吹付材の
結合剤としては、たとえばアルミナセメント、ケイ酸ソ
ーダ、リン酸ソーダ、シリカゾルを使用することができ
る．
背面側の断熱性不定形耐火材５としては、酸性あるいは
中性の断熱質吹付材を用いている。この断熱性は高い方
が好ましく、耐火性は少なくとも１３００℃あることが
好ましい．具体例としては、発泡シリカ、断熱シャモッ
ト、発泡ムライト、発泡アルミナなどを用いることがで
き、またアルξナ質、ムライト質のセラミックファイバ
ーも使用することができる．この断熱質の吹付材の結合
剤としては、稼働面側の耐火質吹付材と同系統のものを
使用するのが好ましく、後述するように両者を混合し吹
付けて中間部を形成する関係で、異種の結合剤が混ざる
ようにするのは好ましくない．
中間部の耐火断熱混合不定形材６としては、上記耐火質
吹付材と断熱質吹付材とを混合して用いるもので、混合
比率は適宜に変えることができる．その混合比率として
は、たとえばライニング部３の背面に近い側では、断熱
質吹付材の割合を多くし、順次その比率を変えて、稼働
面に近い側では耐火質吹付材の比率を多くするのが好ま
しい．このように、不定形耐火材の熱伝導率を順次変え
ていくとともに、熱膨張率の急激な変化を抑制して吹付
材間の層状の剥離などをさけるようにするのが望ましい
ものである．
上記吹付材の吹付けに使用する吹付機としては、乾式タ
イプ（ノズルミックスタイプ）が望ましく、取鍋で施工
する場合には、取鍋のセンターを軸に３６０度回転して
施工できる方式のものが好ましい。For this reason, attempts have been made to install insulating bricks or ceramic sheets on the back side of the fireproof wall, but the former has problems in terms of energy saving and cost, and the latter has problems in terms of cost. There is a problem with this. Means for Solving the Problems The present invention has been made in view of the above-mentioned problems.In order to solve the above-mentioned problems, the working surface side of the lining part of the fireproof wall is made of a fire-resistant monolithic refractory material, and the back side is made of a fire-resistant monolithic refractory material. is formed of a heat-insulating monolithic refractory material, and the intermediate portion between the working surface side and the back side of the lining portion is formed of a fire-resistant and heat-insulating mixed monolithic refractory material, which is a mixture of fire-resistant and heat-insulating monolithic refractory materials. The object of the present invention is to provide a fireproof wall lining structure characterized by the following features. According to the present invention, the lining part of the fireproof wall is made of a fire-resistant monolithic refractory material formed on the working surface side of the fireproof wall, so that the required heat resistance can be ensured and the fireproof wall can be operated. In addition, the insulating monolithic refractory material on the back side of the lining prevents heat loss from the firewall, resulting in energy savings. Then, a mixed layer of a monolithic refractory material with fire resistance and heat insulation properties is placed between the operating surface side and the rear surface side of the lining section, so that the monolithic refractory materials on the operating surface side and the rear surface side are respectively bounded. It is tightly connected at the boundary and can be prevented from peeling off at the boundary, allowing for durable operation. EXAMPLES The present invention will be explained below based on examples. The attached figure shows one embodiment of the present invention. As shown in the figure, the lining part 3 covering the iron skin 2 of the fireproof wall 1 of a molten metal container such as a ladle has a fire-resistant monolithic refractory material 4 on the inner working surface side and a heat-insulating material on the outer back side. A monolithic refractory material 5 is integrally laminated with a monolithic refractory material 6, which is a mixture of a fire-resistant monolithic refractory material and a heat-insulating monolithic refractory material 6, in the middle. As the refractory monolithic refractory material 4 on the operating surface side, for example, neutral or acidic refractory sprayed material is used. Specifically, these spray materials include waxite, chamotte, high alumina, alumina, zircon, and soubinel, and these can be sprayed alone, or two or more materials can be combined as necessary. Can be sprayed in multiple layers. As a binder for these spray materials, for example, alumina cement, sodium silicate, sodium phosphate, or silica sol can be used. As the heat-insulating monolithic refractory material 5 on the back side, an acidic or neutral heat-insulating spray material is used. The higher the heat insulation, the better, and the fire resistance is preferably at least 1300°C. As specific examples, foamed silica, heat-insulating chamotte, foamed mullite, foamed alumina, etc. can be used, and alumina-based and mullite-based ceramic fibers can also be used. As the binder for this heat-insulating spray material, it is preferable to use the same type of fire-resistant spray material on the operating surface side, and as described later, the two are mixed and sprayed to form the intermediate part. , it is undesirable to mix different types of binders. The fire-resistant and heat-insulating mixed irregular shaped material 6 in the middle section is a mixture of the above-mentioned fire-resistant sprayed material and heat-insulating sprayed material, and the mixing ratio can be changed as appropriate. As for the mixing ratio, for example, on the side near the back of the lining part 3, increase the proportion of heat-insulating spray material, then gradually change the ratio, and on the side near the operating surface, increase the proportion of fire-resistant spray material. is preferable. In this way, it is desirable to gradually change the thermal conductivity of the monolithic refractory material and to suppress rapid changes in the coefficient of thermal expansion to avoid separation of layers between the sprayed materials. The spraying machine used for spraying the above spraying materials is preferably a dry type (nozzle mix type), and when spraying with a ladle, one that can rotate 360 degrees around the center of the ladle. is preferred.
耐火質吹付材と断熱質吹付材は、それぞれ別個の吹付機
を使用して吹付けてもよいし、２１式吹付機を使用して
２種類の吹付材のフィード比率を変えつつ吹付けするな
ど適宜に行えるものである。The fire-resistant spray material and the heat-insulating spray material may be sprayed using separate spray machines, or they may be sprayed using a Type 21 spray machine while changing the feed ratio of the two types of spray materials. This can be done as appropriate.
上記のように耐火性不定形耐火材と断熱性不定形耐火材
を連続的に吹付けて形成することは、取鍋等の溶融金属
容器の耐火壁の施工に省力化や省エネルギー化がはかれ
るとともに、流し込み施工に必要な中子が不要となるな
ど有利で好ましいものである。Forming the fire-resistant monolithic refractory material and the heat-insulating monolithic refractory material by continuously spraying them as described above saves labor and energy when constructing fire-resistant walls for molten metal containers such as ladles. This method is advantageous and preferable because it eliminates the need for a core required for pouring construction.
また、吹付け施工した溶融金属容器は、流し込み施工し
た場合よりも通気性が高いので、短時間で乾燥昇温でき
て好ましい．
次表は、本発明について、耐火質吹付材、断熱質吹付材
の配合をかえて２５０トン取鍋に実施し、従来の技術に
もとづいたものと比較したものである。In addition, molten metal containers that are sprayed have higher air permeability than those that are poured, so they can be dried and heated in a short time, which is preferable. The following table shows the comparison between the present invention, which was applied to a 250-ton ladle with different combinations of fire-resistant sprayed material and heat-insulating sprayed material, and those based on conventional technology.
本発明の実施例の比較表
実施例１では耐火質吹付材としてジルコン質を、断熱吹
付材として発泡シリカを使用したものを選択し、実施例
２では耐火質吹付材として高アルミナ質を、断熱質吹付
材として発泡アルミナを使用したものを選択し、稼働面
側を１５０ｍｍ，背面側を３０ｍ、中間部を５０ｍｓの
厚さとして施工した。比較例１では実施例ｌと同じ組み
合わせを使用し、断熱質吹付材を吹付けて、その上に耐
火質吹付材を吹付けたものである．すなわち、本発明の
中間部を形戊せずに同じ厚さとしたものである。比較例
２では、ろう石れんがの永久張りの上にジルコン質キャ
スタブルを流し込み施工したものである。Comparison table of examples of the present invention In Example 1, zircon material was selected as the fire-resistant spray material and foamed silica was selected as the heat-insulating spray material.In Example 2, high-alumina material was used as the fire-resistant spray material and heat-insulating material Foamed alumina was selected as the quality spraying material, and the thickness was 150 mm on the operating side, 30 m on the back side, and 50 ms on the middle part. In Comparative Example 1, the same combination as in Example 1 was used, in which a heat-insulating spray material was sprayed and a fire-resistant spray material was sprayed on top of that. That is, the intermediate portion of the present invention is made to have the same thickness without changing its shape. In Comparative Example 2, zircon castable was poured onto a permanent covering of waxite bricks.
施工の結果、吹付材は９０〜９５％の付着率で、いずれ
も付着性は良好であった。As a result of the construction, the adhesion rate of the sprayed materials was 90 to 95%, and the adhesion was good in all cases.
また、上表の実施例１、実施例２の通り、同しジルコン
賞であれば、流し込み施工より若干耐用性は劣るものの
、溶鋼の温度低下は比較例１では２０゜Ｃであったが、
１０℃となって温度低下は比較例の５０〜６０％にとど
まり、本実施例が有効なことがわかる．また、中間部を
形成したことにより、耐火質吹付材と断熱質吹付材の特
性が連続的に変化し、比較例ｌのように両者の境界部か
ら剥離するようなことがなくなって耐久性を向上できる
．
また、上表の実施例２のように高アルミナ質の耐火質吹
付材、高アルミナ質の断熱性吹付材を使用した場合、耐
用性は大幅にのびた．しかし、材質そのものの熱伝導率
が高いために、ジルコン吹付材程の温度低下抑制の効果
はなかったが、比較例２の場合と比べると、温度低下抑
制の効果がみられる．また、上記実施例１、２について
は、いずれも吹付け施工をしたので、通気性が高く、従
来の流し込み施工では乾燥に３６時間必要であったが、
２４時間でできるようになった．
このように、本発明の上記吹付け施工ではうイニング部
を連続的に一体的に処理できて好ましいが、流し込み施
工等で行うことも可能である。In addition, as shown in Examples 1 and 2 in the table above, with the same Zircon Award, although the durability is slightly inferior to pouring construction, the temperature drop of molten steel was 20°C in Comparative Example 1,
The temperature drop was 10°C, which was only 50 to 60% of that of the comparative example, which shows that this example is effective. In addition, by forming the intermediate part, the properties of the fire-resistant spray material and the heat-insulating spray material change continuously, and there is no peeling from the boundary between the two as in Comparative Example 1, which improves durability. It can be improved. Furthermore, when high-alumina fire-resistant spray material and high-alumina heat-insulating spray material were used as in Example 2 in the table above, the durability was significantly extended. However, due to the high thermal conductivity of the material itself, it was not as effective in suppressing the temperature drop as the zircon sprayed material, but compared to Comparative Example 2, it was more effective in suppressing the temperature drop. In addition, since both Examples 1 and 2 were sprayed, they had high air permeability, whereas conventional pouring required 36 hours to dry.
I was able to do it in 24 hours. As described above, the above-mentioned spraying method of the present invention is preferable because the lining portion can be treated continuously and integrally, but it is also possible to perform the method by pouring method or the like.
以上の実施例は本発明の数例にすぎず、本発明の趣旨に
逸脱しない範囲においてタンディッシュや脱ガス槽等に
も適宜に変更して適用することができるものである．
発明の効果
以上のように本発明にあっては、稼働面側が耐火性を有
し、背面側が断熱性を有し、その中間に両者を混合した
中間部を形成して、稼働面の耐火性機能から背面の断熱
性機能まで中間部を介して順次機能が変化するライニン
グ部を形成でき、耐火および断熱の両方が優れた耐火壁
を形戒できる．また、不定形耐火材で形成するので、ラ
イニング部の形成に省力化がはかれ、価格が高騰化する
のを防止できるものである．The above embodiments are merely a few examples of the present invention, and the present invention can be modified and applied to tundishes, degassing tanks, etc. without departing from the spirit of the present invention. Effects of the Invention As described above, in the present invention, the working surface side has fire resistance, the back side has heat insulation property, and an intermediate part that is a mixture of both is formed in between, thereby improving the fire resistance of the working surface. It is possible to form a lining part whose function changes sequentially from the function to the insulation function of the back side through the middle part, and it is possible to form a fireproof wall with excellent both fire resistance and heat insulation. In addition, since it is made of monolithic refractory material, it is possible to save labor in forming the lining part and prevent the price from rising.
添付図は、本発明の一実施例の一部省略の側断面図であ
る．
１・・・耐火壁、３・・・ライニング部、４・・・耐火
性不定形耐火材、５・・・断熱性不定形耐火材、６・・
・耐火断熱混合不定形耐火材．The attached drawing is a partially omitted side sectional view of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Fireproof wall, 3... Lining part, 4... Fire-resistant monolithic refractory material, 5... Heat-insulating monolithic fireproof material, 6...
- Fireproof and heat insulating mixed monolithic fireproofing material.
Claims (1)
耐火材で、背面側を断熱性不定形耐火材で形成し、上記
ライニング部の稼働面側と背面側との中間部を耐火性と
断熱性の不定形耐火材を混合した耐火断熱混合不定形耐
火材で形成したことを特徴とする耐火壁のライニング構
造。(1) The working side of the lining part of the fireproof wall is made of a fire-resistant monolithic refractory material, the back side is made of a heat-insulating monolithic refractory material, and the intermediate part between the working face side and the back side of the lining part is made fireproof. A lining structure for a fireproof wall, characterized in that it is formed of a monolithic refractory material that is a mixture of fireproof and heat insulating monolithic refractory materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15497689A JPH0320589A (en) | 1989-06-17 | 1989-06-17 | Lining structure of refractory wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15497689A JPH0320589A (en) | 1989-06-17 | 1989-06-17 | Lining structure of refractory wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0320589A true JPH0320589A (en) | 1991-01-29 |
Family
ID=15595995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15497689A Pending JPH0320589A (en) | 1989-06-17 | 1989-06-17 | Lining structure of refractory wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320589A (en) |
-
1989
- 1989-06-17 JP JP15497689A patent/JPH0320589A/en active Pending
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