JP2001317880A - Refractory protecting sheet, refractory lining and refractory structure - Google Patents
Refractory protecting sheet, refractory lining and refractory structureInfo
- Publication number
- JP2001317880A JP2001317880A JP2000138451A JP2000138451A JP2001317880A JP 2001317880 A JP2001317880 A JP 2001317880A JP 2000138451 A JP2000138451 A JP 2000138451A JP 2000138451 A JP2000138451 A JP 2000138451A JP 2001317880 A JP2001317880 A JP 2001317880A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- brick
- sheet
- lining
- carbon
- 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.)
- Withdrawn
Links
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は溶融金属や高温物質
を取り扱う窯炉，保持容器等の耐火物構造体とそれを内
張りする耐火ライニング，及びその耐火ライニングに用
いる保護シートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory structure such as a kiln or a holding vessel for handling molten metal or high-temperature material, a refractory lining for lining the refractory structure, and a protective sheet used for the refractory lining.
【０００２】[0002]
【従来の技術】例えば、カーボン含有系耐火物は耐スラ
グ性が優れ高耐用性が期待できるので、金属精錬窯炉、
鉄鋼製造設備では転炉（マグネシア−カーボンれん
が）、溶銑予備処理設備（アルミナ−ＳｉＣ−カーボン
れんが）、二次精錬窯炉（マグネシア−カーボンれん
が）などのライニングをなす耐火物構造体に近年多用さ
れている。しかしこれらの耐火物を使用すると、背面
側、すなわち鉄皮側が酸化されて損耗することがある。
二次精錬窯炉では特にこの現象が顕著である。この背面
酸化の原因は、鉄皮の隙間や蒸気抜き孔から侵入した大
気である。使用中の耐火物の背面は数百℃であり、大気
が存在するとカーボンが酸化され、れんがの背面酸化を
招く。2. Description of the Related Art For example, carbon-containing refractories have excellent slag resistance and can be expected to have high durability.
In recent years, steelmaking equipment has been widely used in refractory structures, such as converters (magnesia-carbon bricks), hot metal pretreatment equipment (alumina-SiC-carbon bricks), and secondary smelting furnaces (magnesia-carbon bricks). ing. However, when these refractories are used, the rear side, that is, the steel shell side may be oxidized and worn.
This phenomenon is particularly remarkable in secondary refining kilns. The cause of this backside oxidation is the air that has entered through the gaps in the steel shell or through the steam vent holes. The back surface of the refractory in use has a temperature of several hundred degrees Celsius, and carbon is oxidized in the presence of air, which causes oxidation of the back surface of the brick.
【０００３】この問題を解決するために、例えばマグネ
シア−カーボン質れんがの背面にメタルケースを取り付
けたり、あるいは特開昭６２−２５５７８５号公報に記
載されているように、可撓性ボードをマグネシア−カー
ボン質れんがの背面に配設する技術が知られている。In order to solve this problem, for example, a metal case is attached to the back of magnesia-carbon brick, or as described in JP-A-62-255785, a flexible board is made of magnesia. A technique of disposing the back of a carbon brick is known.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、メタル
ケースを取り付けるには手数がかかり、れんがの製造効
率を低下させ、またメタルケース自体のコストも無視で
きないため、結果的にれんがのコストが上昇する。ま
た、個々のメタルケースの隙間から大気が侵入し、れん
がが酸化される場合もある。他方、特開昭６２−２５５
７８５号公報に記載の可撓性ボードは、使用して熱を受
けると通気性が増加し、背面酸化を防止することができ
ない問題点がある。However, mounting the metal case is troublesome, reducing the production efficiency of the brick, and the cost of the metal case itself cannot be ignored. As a result, the cost of the brick increases. In addition, the air may enter through the gaps between the individual metal cases and oxidize the brick. On the other hand, JP-A-62-255
The flexible board described in Japanese Patent No. 785 has a problem in that when it is used and receives heat, the air permeability increases and the backside oxidation cannot be prevented.
【０００５】本発明は、溶融金属や高温物質を取り扱う
窯炉、保持容器等の耐火物構造体の耐火物の背面酸化を
防止し、窯炉等の耐火物ライニングの寿命を向上させ、
溶融金属等の製造コストを削減することができる耐火物
保護シート、耐火ライニング、及び耐火物構造体を提供
することを目的とする。The present invention prevents the backside oxidation of refractories of refractory structures such as kilns and holding vessels that handle molten metal and high-temperature substances, improves the life of refractory linings of kilns and the like,
An object of the present invention is to provide a refractory protective sheet, a refractory lining, and a refractory structure capable of reducing the production cost of molten metal and the like.
【０００６】[0006]
【課題を解決するための手段】この課題を解決するため
に研究を続けた結果、本発明を完成した。すなわち、本
発明の要旨とするところは、（１）鉄皮と耐火物の間に
設置し、耐火物構造体の一部と同一の形状を有し、側壁
から底部にかけて折り込み部を有し、耐火物構造体の周
方向に沿って複数に分割された、金属板からなることを
特徴とする耐火物保護シート、（２）前記金属板に可撓
性シートが固着されていることを特徴とする（１）に記
載の耐火物保護シート、（３）（１）または（２）記載
の耐火物保護シートで耐火物の周囲が覆われていること
を特徴とする耐火ライニング、（４）鉄皮の内側に
（３）記載の耐火ライニングが配設されていることを特
徴とする耐火物構造体にある。Means for Solving the Problems As a result of continuing research for solving the problems, the present invention has been completed. That is, the gist of the present invention is as follows: (1) installed between a steel shell and a refractory, having the same shape as a part of the refractory structure, and having a folded portion from a side wall to a bottom; A refractory protection sheet comprising a metal plate divided into a plurality of pieces along the circumferential direction of the refractory structure, and (2) a flexible sheet is fixed to the metal plate. (1) The refractory protective sheet according to (1), (3) the refractory lining, wherein the periphery of the refractory is covered with the refractory protective sheet according to (1) or (2), (4) Iron The refractory structure according to (3), wherein the refractory lining according to (3) is disposed inside the skin.
【０００７】[0007]
【発明の実施の形態】図１に本発明の耐火物保護シート
の例を示す。この実施例によれば、個々のれんがにメタ
ルケースを取り付けるよりも施工が簡単で、しかも継ぎ
目が少ないため、れんがの背面酸化を効果的に防止する
ことができる。耐火物保護シート３は円周方向に複数に
分割し（図では３分割）、鉄皮１のひずみやパーマれん
が２の築造のゆがみを吸収できるようにしてある。ま
た、シート３同士はその端部にて若干重なるようにし、
大気の侵入を極力防止する。この重なり幅は最低１０mm
以上は確保することが好ましい。また、折り込み部５
は、図１のように内向きのフランジ状に加工しても、切
れ目を入れて折り込んでも、あるいは図２のように切れ
目を入れて折り込んでも良い。折り込み部５の長さは、
覆われるれんがの長さ（複数のれんがが覆われる場合は
それぞれの長さの合計）の１０〜１００％とするのが望
ましい。FIG. 1 shows an example of a refractory protection sheet according to the present invention. According to this embodiment, since the construction is simpler than the case where the metal case is attached to each brick and the number of joints is small, it is possible to effectively prevent the backside oxidation of the brick. The refractory protection sheet 3 is divided into a plurality of parts in the circumferential direction (three divisions in the figure) so that the distortion of the steel shell 1 and the distortion of the construction of the perm brick 2 can be absorbed. Also, the sheets 3 are slightly overlapped at their ends,
Prevent air intrusion as much as possible. This overlap width is at least 10mm
It is preferable to secure the above. In addition, the folding part 5
May be processed into an inward flange shape as shown in FIG. 1, may be cut and folded, or may be cut and folded as shown in FIG. The length of the folding part 5 is
It is desirable to set the length to 10 to 100% of the length of the brick to be covered (when a plurality of bricks are covered, the sum of the lengths).
【０００８】シートを形成する金属板の材質は、融点が
窯炉の操業温度マイナス５００℃以上のものであること
が望ましい。それより融点が低いと溶融して穴が開く恐
れがあるためである。鉄鋼精錬用窯炉の場合、普通鋼、
耐火鋼、ステンレス鋼などが推奨できる。また厚さは、
強度と耐用性の観点から０．１mm程度以上、また配設時
の作業性の観点から５mm以下、より望ましくは１mm以下
である。It is desirable that the material of the metal plate forming the sheet has a melting point of not less than the operating temperature of the kiln minus 500 ° C. If the melting point is lower than that, there is a risk of melting and opening a hole. For steel refining kilns, ordinary steel,
Refractory steel, stainless steel, etc. can be recommended. The thickness is
It is about 0.1 mm or more from the viewpoint of strength and durability, and 5 mm or less, more preferably 1 mm or less from the viewpoint of workability at the time of installation.
【０００９】シートの配設方法は、必要に応じてパーマ
れんがを鉄皮に築造し、本発明のシートを鉄皮あるいは
パーマれんが表面に沿わせて少しずつ重なるように２つ
以上に分割した保護シートを隙間なく配し、その内側に
ウエアれんがを築造する。なおパーマれんがはシートの
外側に配しても、内側に配しても、また両側に配しても
良い。[0009] As for the method of arranging the sheet, if necessary, a perm brick is erected on an iron shell, and the sheet of the present invention is divided into two or more parts so that the iron shell or the perm brick is gradually overlapped along the surface. Arrange the seats without gaps, and build a wear brick inside. The perm brick may be arranged outside the sheet, inside, or on both sides.
【００１０】金属製のシートは柔軟性に欠けるため、や
やもすると金属製のシートとパーマれんがの間、あるい
は金属製シートとウエアれんがの間に隙間が生じる可能
性がある。シートをなす金属板に可撓性シートを固着し
ておけば、その柔軟性により隙間を充填することができ
る。可撓性のシートはアルミナ、スピネル、マグネシ
ア、ドロマイト、ムライト、シリカあるいは珪石、クロ
ム鉱、クロミア、チタニア、ジルコニア、ジルコン、粘
土、シャモット、ボーキサイト、ばん土頁岩、炭化珪素
などの炭化物、ほう化物、金属、ガラスなどの耐火材の
一種あるいは二種以上と必要に応じて樹脂を混練して成
形することで得られる。固着の方法は粘接着力によるの
が簡単で、接着剤を用いても良く、可撓性シート自体が
有する粘着力によっても良い。また、可撓性シート原料
の混練物を金属製シートに固着させながら成形しても良
い。Since a metal sheet lacks flexibility, there is a possibility that a gap may be formed between the metal sheet and the permanent brick or between the metal sheet and the wear brick. If the flexible sheet is fixed to the metal plate forming the sheet, the gap can be filled by its flexibility. Flexible sheets include carbides, borides, such as alumina, spinel, magnesia, dolomite, mullite, silica or silica, chromite, chromia, titania, zirconia, zircon, clay, chamotte, bauxite, clay shale, and silicon carbide. It can be obtained by kneading one or more kinds of refractory materials such as metal and glass and, if necessary, resin and molding. The fixing method is simple based on the adhesive force, an adhesive may be used, or the adhesive force of the flexible sheet itself may be used. Alternatively, the kneaded material of the flexible sheet raw material may be formed while being fixed to a metal sheet.
【００１１】以上、保護される耐火物構造体がカーボン
含有れんがの場合で説明したが、耐火物としてはれんが
以外のキャスタブルなどの不定形耐火物でも同じ作用と
効果が得られる。Although the case where the refractory structure to be protected is a carbon-containing brick has been described above, the same function and effect can be obtained by using a refractory other than bricks such as castables and other irregular shaped refractories.
【００１２】[0012]
【実施例】図１の構造の側壁を有する容量３００ｔのＲ
Ｈ脱ガス設備の下部槽を実操業に供した。耐火物保護シ
ートをなす金属板は厚さ０．７mmの普通鋼（炭素鋼）
で、ウエアれんがは長さ（厚さ）３８０mmの炭素を８質
量％含有するマグネシア−カーボン質れんがであった。
また、パーマれんがは長さ（厚さ）６５mmのマグクロれ
んがであった。耐火物保護シートは円周方向に３分割
し、お互いに１００mm重なるようにした。また折り込み
部の長さはウエアれんが全長（３８０mm）の３分の１と
した。DESCRIPTION OF THE PREFERRED EMBODIMENTS An R of 300 t of capacitance having sidewalls of the structure of FIG.
The lower tank of the H degassing facility was used for actual operation. The metal plate that forms the refractory protection sheet is 0.7 mm thick ordinary steel (carbon steel)
The wear brick was a magnesia-carbon brick containing 8% by mass of carbon having a length (thickness) of 380 mm.
The perm brick was a magcro brick having a length (thickness) of 65 mm. The refractory protection sheet was divided into three parts in the circumferential direction so as to overlap each other by 100 mm. The length of the folded portion was one third of the entire length (380 mm) of the wear brick.
【００１３】鉄皮にパーマれんがを通常通り厚さ６５mm
に築造し、下部槽底にマグクロれんがを築造した後、３
分割した耐火物保護シートをパーマれんがに隙間なく沿
わせ、お互いが重なるようにした。次に、その内側にウ
エアれんがのマグネシア−カーボン質れんがを築造し
た。築造の際にはウエアれんがの背面が耐火物保護シー
トにきちんと隙間なく当たるように注意した。[0013] Perm brick is 65mm thick as usual
After building a magcro brick on the bottom of the lower tank,
The divided refractory protection sheets were placed along the perm brick without any gaps so that they overlapped each other. Next, a magnesia-carbon brick of wear brick was built inside. During the construction, care was taken to ensure that the back of the wear brick properly hit the refractory protection sheet without any gaps.
【００１４】築造が完了した下部槽を通常通り乾燥、昇
温して実使用に供した。使用回数５６７回で側壁の一部
（ウエアれんが５枚分）でパーマれんがが露出したため
操業を中止し、冷却後に側壁耐火物を解体調査した。そ
の結果、ウエアのマグネシア−カーボン質れんがには背
面酸化は認められなかった。他方、耐火物保護シートを
施工しない従来の下部槽は、通常は５００回前後でパー
マが広範囲（ウエアれんが数十枚分）に露出し、ウエア
れんがの背面に厚さ３０〜５０mmの酸化層が形成されて
おり、背面酸化防止とウエアれんがの寿命向上への本発
明の寄与は明らかであった。The completed lower tank was dried and heated as usual and used for actual use. The operation was stopped because the perm brick was exposed on a part of the side wall (5 pieces of wear bricks) after 567 times of use, and the refractory on the side wall was inspected after cooling after cooling. As a result, no back oxidation was observed on the magnesia-carbon brick of the wear. On the other hand, in the conventional lower tank without the refractory protection sheet, the perm is exposed to a wide area (several tens of pieces of wear bricks) after about 500 times, and an oxide layer having a thickness of 30 to 50 mm is formed on the back of the wear bricks. Thus, the contribution of the present invention to the prevention of backside oxidation and the improvement of the life of the wear brick was obvious.
【００１５】[0015]
【発明の効果】本発明により溶融金属や高温物質を取り
扱う窯炉等の耐火物の背面酸化を防止することができ、
窯炉等の耐火物ライニングの寿命を向上させることがで
き、溶融金属等の製造コストを削減することができる。According to the present invention, the backside oxidation of refractories such as kilns handling molten metal and high-temperature substances can be prevented,
The life of the refractory lining of a kiln or the like can be improved, and the production cost of molten metal or the like can be reduced.
【図１】本発明に係る金属製耐火物保護シートをウエア
れんがの背面とパーマれんがの間に施工したＲＨ脱ガス
設備の下部槽側壁の例を示す斜視概略図。FIG. 1 is a schematic perspective view showing an example of a lower tank side wall of RH degassing equipment in which a metal refractory protection sheet according to the present invention is installed between the back of a wear brick and a permanent brick.
【図２】金属シートの端に切り込みを入れて折り込み部
とした耐火物保護シートの他の例を示す斜視図。FIG. 2 is a perspective view showing another example of a refractory protection sheet in which a notch is cut into an end of a metal sheet to form a folded portion.
１ 鉄皮 ２ パーマれんが ３ 耐火物保護シート ４ ウェアれんが ５ 耐火物保護シートの折り込み部 REFERENCE SIGNS LIST 1 steel shell 2 perm brick 3 refractory protection sheet 4 wear brick 5 refractory protection sheet fold
Claims (4)
体の一部と同一の形状を有し、側壁から底部にかけて折
り込み部を有し、耐火物構造体の周方向に沿って複数に
分割された、金属板からなることを特徴とする耐火物保
護シート。1. A refractory structure which is installed between a steel shell and a refractory, has the same shape as a part of the refractory structure, has a folded portion from a side wall to a bottom, and extends along a circumferential direction of the refractory structure. A refractory protection sheet comprising a metal plate divided into a plurality of pieces.
いることを特徴とする請求項１に記載の耐火物保護シー
ト。2. The refractory protection sheet according to claim 1, wherein a flexible sheet is fixed to the metal plate.
トで耐火物の周囲が覆われていることを特徴とする耐火
ライニング。3. A refractory lining, wherein the periphery of the refractory is covered with the refractory protection sheet according to claim 1.
ングが配設されていることを特徴とする耐火物構造体。4. A refractory structure, wherein the refractory lining according to claim 3 is provided inside a steel shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000138451A JP2001317880A (en) | 2000-05-11 | 2000-05-11 | Refractory protecting sheet, refractory lining and refractory structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000138451A JP2001317880A (en) | 2000-05-11 | 2000-05-11 | Refractory protecting sheet, refractory lining and refractory structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001317880A true JP2001317880A (en) | 2001-11-16 |
Family
ID=18646054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000138451A Withdrawn JP2001317880A (en) | 2000-05-11 | 2000-05-11 | Refractory protecting sheet, refractory lining and refractory structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001317880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015105039A1 (en) | 2014-01-10 | 2015-07-16 | Ｊｆｅスチール株式会社 | Method for suppressing back oxidation of carbon-containing refractory product, lining structure, and carbon-containing refractory product |
| CN109690218A (en) * | 2016-08-24 | 2019-04-26 | 维苏威美国公司 | Metallurgical tank liner with closed metal layer |
| KR20210057959A (en) * | 2019-11-13 | 2021-05-24 | 주식회사 포스코건설 | Apparatus for protecting refractory of melting furnace and melting furnace having the same |
-
2000
- 2000-05-11 JP JP2000138451A patent/JP2001317880A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015105039A1 (en) | 2014-01-10 | 2015-07-16 | Ｊｆｅスチール株式会社 | Method for suppressing back oxidation of carbon-containing refractory product, lining structure, and carbon-containing refractory product |
| KR20160107256A (en) | 2014-01-10 | 2016-09-13 | 제이에프이 스틸 가부시키가이샤 | Method for suppressing back oxidation of carbon-containing refractory product, lining structure, and carbon-containing refractory product |
| US10183895B2 (en) | 2014-01-10 | 2019-01-22 | Jfe Steel Corporation | Method for suppressing rear face oxidation of carbon-containing refractory, lining structure, and carbon-containing refractory |
| CN109690218A (en) * | 2016-08-24 | 2019-04-26 | 维苏威美国公司 | Metallurgical tank liner with closed metal layer |
| JP2019524454A (en) * | 2016-08-24 | 2019-09-05 | ベスビウス ユーエスエー コーポレイション | Lining of metallurgical containers with encapsulated metal layers |
| EP3504498A4 (en) * | 2016-08-24 | 2020-01-15 | Vesuvius U S A Corporation | Metallurgical vessel lining with enclosed metal layer |
| US10989473B2 (en) | 2016-08-24 | 2021-04-27 | Vesuvius U S A Corporation | Metallurgical vessel lining with enclosed metal layer |
| CN109690218B (en) * | 2016-08-24 | 2021-07-27 | 维苏威英国有限公司 | Metallurgical vessel liner with closed metal layer |
| KR20210057959A (en) * | 2019-11-13 | 2021-05-24 | 주식회사 포스코건설 | Apparatus for protecting refractory of melting furnace and melting furnace having the same |
| KR102273074B1 (en) | 2019-11-13 | 2021-07-06 | 주식회사 포스코건설 | Apparatus for protecting refractory of melting furnace and melting furnace having the same |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070807 |