JP2813091B2 - Rotary kiln lining structure - Google Patents
Rotary kiln lining structureInfo
- Publication number
- JP2813091B2 JP2813091B2 JP4050593A JP5059392A JP2813091B2 JP 2813091 B2 JP2813091 B2 JP 2813091B2 JP 4050593 A JP4050593 A JP 4050593A JP 5059392 A JP5059392 A JP 5059392A JP 2813091 B2 JP2813091 B2 JP 2813091B2
- Authority
- JP
- Japan
- Prior art keywords
- brick
- rotary kiln
- zone
- lining
- coaching
- 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 - Fee Related
Links
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はロータリーキルンの内張
り構造、特にロータリーキルンの焼成帯とコーチング着
脱帯との煉瓦施工構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary kiln lining structure, and more particularly to a brick construction structure for a rotary kiln firing zone and a coaching detachable zone.
【０００２】[0002]
【従来の技術】ロータリーキルンの代表的なセメントロ
ータリーキルンの焼成帯は主としてマグ・クロ質煉瓦で
内張りしてあり、焼成帯の奥側（原料装入側）に隣接す
るコーチング着脱帯（以下着脱帯と言う）は主にスピネ
ル質煉瓦で内張りされている。2. Description of the Related Art The sintering zone of a typical rotary kiln of a rotary kiln is mainly lined with mag-chrome bricks, and a coaching attachment / detachment zone (hereinafter referred to as an attachment / detachment zone) adjacent to the back side (raw material charging side) of the sintering zone. Is mainly lined with spinel brick.
【０００３】焼成帯、着脱帯に用いられる内張り耐火煉
瓦は、それぞれの使用条件に適合するように煉瓦特性
（コーチング付着性、耐スポーリング性、耐食性、耐摩
耗性、耐脆化性、耐アルカリ性等を考慮して前述の該当
品質の煉瓦が内張りされている。[0003] The refractory lining used for the firing zone and the detachable zone has brick properties (coating adhesion, spalling resistance, corrosion resistance, abrasion resistance, abrasion resistance, embrittlement resistance and alkali resistance) so as to conform to the respective use conditions. In consideration of the above, bricks of the above-mentioned quality are lined.
【０００４】[0004]
【発明が解決しようとする課題】従来、セメントロータ
リーキルンの操業においては、セメント原料成分の変
動、供給量の変動、燃焼フレームの形状等による操業条
件により、焼成帯、着脱帯の位置が一定せず、変動を繰
り返していることが知られている。またセメント焼成品
種の切替によって焼成帯、着脱帯の位置が変化する。前
述の如く、セメントロータリーキルンの焼成帯、着脱帯
はその焼成条件により煉瓦材質別に張り分けられてお
り、操業条件等による炉内状況の変化に対して内張り耐
火煉瓦の対応に限りがあり、特に異種煉瓦の内張り境界
付近の耐用性が低下し易い。Conventionally, in the operation of a cement rotary kiln, the positions of the sintering zone and the detachable zone are not fixed due to the operating conditions such as the fluctuation of the cement raw material components, the fluctuation of the supply amount, and the shape of the combustion frame. Is known to fluctuate. In addition, the position of the sintering zone and the removable zone is changed by switching the cement sintering type. As mentioned above, the firing zone and the detachable zone of the cement rotary kiln are divided according to the brick material according to the firing conditions, and the response of the lining refractory brick to changes in the furnace conditions due to operating conditions etc. is limited, especially for different types. The durability near the lining boundary of the brick is apt to decrease.
【０００５】すなわち、焼成帯に使用されているマグ・
クロ質煉瓦は耐熱性やコーチング付着性に優れているが
コーチングの着脱帯の条件下に置かれた場合には、該煉
瓦は、熱変化を受けるためスポーリングによる損傷が大
きく、また、着脱帯に使用されているスピネル質煉瓦は
耐スポーリングが優れているが、焼成帯の条件下に置か
れた場合は着脱帯条件下よりもより高温にさらされかつ
コーチングがマグ・クロ質煉瓦に比べて付着しにくい材
質であるためコーチング層が不充分となり、このため高
温となり過ぎ（耐熱的問題）セメント成分中の石灰分と
反応して溶損し易く、更に熱伝導率がマグ・クロ質煉瓦
に比べ約１．３倍と高いため、鉄皮温度が上昇し（約３
５０°〜４００℃）、鉄皮と煉瓦との膨張差によりそれ
らの接合面に滑りを発生し、また鉄皮の疲労発生の原因
となると共に放散熱量が大きく省エネルギーの面から好
ましくない。[0005] That is, the mug used in the firing zone
The black brick is excellent in heat resistance and adhesion to the coaching, but when placed under the condition of the detachable band of the coaching, the brick is greatly damaged by spalling due to thermal change, and the detachable band. The spinel bricks used for the steel are excellent in spalling resistance, but when exposed to the firing zone, they are exposed to higher temperatures than in the detachable zone, and the coaching is compared to the mag-chrome brick. Coating layer is insufficient because it is a material that is difficult to adhere to, resulting in excessively high temperature (heat resistance problem). It reacts with lime in the cement component and easily melts. Since it is about 1.3 times higher, the steel shell temperature increases (about 3 times).
(50 ° to 400 ° C.), a difference in expansion between the steel shell and the brick causes slippage at the joint surface thereof, causes fatigue of the steel shell, and dissipates a large amount of heat, which is not preferable from the viewpoint of energy saving.
【０００６】これらの異種煉瓦の内張り境界付近の耐用
性が低下し易い欠点を改善するために種々の試みが提案
されている。Various attempts have been made to improve the drawback that the durability of these different types of bricks near the lining boundary tends to decrease.
【０００７】例えばドマイト質耐火物とスピネル質耐火
物の交互配列パターンにて組合せて築造してなるセメン
トロータリーキルンの炉壁耐火物構造（実開昭６２−２
９０９２号公報）があるが、ドロマイト質耐火物中のＣ
ａＯとスピネル質耐火物中のＡｌ2 Ｏ3 が反応して低融
点液相を生成し易いことが挙げられる。[0007] For example, the furnace wall refractory structure of a cement rotary kiln constructed by combining in an alternating arrangement pattern of domite refractories and spinel refractories (Jpn.
No. 9092), but C in dolomite refractories.
It is mentioned that aO and Al 2 O 3 in the spinel refractory react easily to form a low-melting liquid phase.
【０００８】そのためドロマイト質耐火物とスピネル質
耐火物の接触する目地損傷は大となり損耗速度は大とな
り耐用性は劣るものである。For this reason, joint damage between the dolomite refractory and the spinel refractory is large, the wear rate is high, and the durability is poor.
【０００９】[0009]
【課題を解決するための手段】本発明者等は、前述の如
き従来方式の諸欠陥を解決するために種々検討、実験の
結果、本発明を開発したものであり、本発明の技術的構
成は、ロータリーキルンの内張りにおける焼成帯とコー
チング着脱帯との内張り材質境界部を、マグ・クロ質煉
瓦とスピネル質煉瓦の耐火煉瓦を縞状に張り合せたゼブ
ラ構造としたことを特徴とし、このような構成とするこ
とにより、各々の短所が他品質の長所で補なわれその結
果ロータリーキルン内張りの材質境界部付近の部分損傷
が抑制されると共に両内張り煉瓦間のコーチング付着厚
さの段差が緩和されて理想的なコーチング付着とし、ス
ムーズな原料流れによる煉瓦の磨耗損傷を減少し、良好
な炉内状況を保持し、従って内張り煉瓦の寿命の延命が
図れるロータリーキルンの内張り構造を提供するもので
ある。コーチング付着厚さでの段差がある場合には原料
が滞溜して局部磨耗を生じる。The present inventors have developed the present invention as a result of various studies and experiments in order to solve the above-mentioned drawbacks of the conventional system. Is characterized by having a zebra structure in which the refractory bricks of mag and black bricks and spinel bricks are stuck together in stripes at the boundary between the sintering zone and the coaching removable zone in the lining of the rotary kiln. With this configuration, each disadvantage is complemented by advantages of other quality, and as a result, partial damage near the material boundary of the rotary kiln lining is suppressed, and the step in the adhesion thickness between the two bricks is reduced. A rotary that provides ideal coaching adhesion, reduces brick wear and tear due to smooth material flow, maintains good furnace conditions, and thus extends the life of the lining brick There is provided a Lung lining structure. If there is a step in the coating thickness, the raw material accumulates and causes local wear.
【００１０】本発明においてゼブラ構造とは、ロータリ
ーキルン内張りをロータリーキルンの軸方向に縞状に配
列したもの又はキルン軸方向に逓減した配列を言うもの
であり、以下添付図面に基づいて具体的に説明する。こ
れら図面はロータリーキルンの内張りにおける耐火煉瓦
の配設位置を示す展開図であり、セメントロータリーキ
ルンの例について説明する。[0010] In the present invention, the zebra structure refers to a structure in which the rotary kiln lining is arranged in stripes in the axial direction of the rotary kiln or an arrangement in which the lining is gradually reduced in the axial direction of the kiln, and will be specifically described below with reference to the accompanying drawings. . These drawings are development views showing the arrangement positions of the refractory bricks in the lining of the rotary kiln, and an example of the cement rotary kiln will be described.
【００１１】図１は本発明のゼブラ構造を内張りのリン
グ単位で円周方向に、図２は本発明のゼブラ構造内張り
をキルンの軸方向に、それぞれ縞状に配設した例であ
る。１は焼成帯２とコーチング着脱帯３との材質境界線
であり、該境界線１の附近の内張りは図１ではキルン内
壁のリング単位に、図２ではキルンの軸方向にマグ・ク
ロ質煉瓦１２及びスピネル質煉瓦１３を交互に縞状に区
画して内張りした例である。FIG. 1 shows an example in which the zebra structure of the present invention is arranged in a circumferential direction in units of a lining ring, and FIG. 2 shows an example in which the zebra structure lining of the present invention is arranged in the axial direction of a kiln in a striped manner. Reference numeral 1 denotes a material boundary between the sintering zone 2 and the coaching removable band 3. The lining near the boundary 1 is a ring unit of the kiln inner wall in FIG. 1 and a mag-chrome brick in the axial direction of the kiln in FIG. This is an example in which 12 and spinel bricks 13 are alternately partitioned into stripes and lined.
【００１２】本発明のゼブラ構造に用いるマグ・クロ煉
瓦とは、その化学成分がＭｇＯ ５０〜９５重量％、Ｃ
ｒ2 Ｏ3 １〜４０重量％を主成分として構成される耐火
物であり、また、スピネル質煉瓦とは、スピネルクリン
カーを５０重量％以下の範囲で配合されるものと、マグ
ネシアクリンカーとアルミナクリンカーを主成分とし、
その製造過程でスピネル (ＭｇＯ・Ａｌ2 Ｏ3 ) を生成
させた耐火物を言う。The mag black brick used in the zebra structure according to the present invention has a chemical composition of 50 to 95% by weight of MgO,
a r 2 O 3 1 to 40 refractory composed by weight% as the main component, also, the spinel brick, to that formulated spinel clinker in the range of 50 wt% or less, magnesia clinker and alumina clinker Is the main component,
It refers to a refractory in which spinel (MgO.Al 2 O 3 ) is produced in the manufacturing process.
【００１３】焼成帯２の耐火煉瓦１２としては熱的負
荷、外来成分に対する耐食性、コーチング安定性、等に
よりマグ・クロ質煉瓦、マグ・ドロマイト煉瓦を用いる
ことが一般的である。また、コーチング着脱帯３の耐火
煉瓦１３としては、温度変化に伴なうコーチング着脱の
くり返しにより生ずるスポーリングに対して抵抗力のあ
るスピネル質煉瓦を用いることが一般的である。As the refractory bricks 12 of the sintering zone 2, mag-chromic bricks and mag-dolomite bricks are generally used in terms of thermal load, corrosion resistance to foreign components, coaching stability, and the like. In addition, as the refractory brick 13 of the coaching detachable band 3, it is general to use a spinel brick which is resistant to spalling caused by repeated coaching attachment and detachment accompanying a temperature change.
【００１４】図２の例は前記煉瓦１２及び１３を交互に
配設、内張りした例（１：１）が図示してあるが、キル
ンの使用諸条件により、これら組合せを変更することが
できる。また、図示の例では材質境界線１を中心に左右
同等にマグ・クロ質煉瓦１２とスピネル質煉瓦１３とを
軸方向に縞状のゼブラ構造としてある。FIG. 2 shows an example in which the bricks 12 and 13 are alternately arranged and lined (1: 1), but these combinations can be changed depending on the usage conditions of the kiln. Further, in the illustrated example, the mag-chrome brick 12 and the spinel brick 13 have a zebra structure striped in the axial direction equally to the left and right about the material boundary line 1.
【００１５】図３はマグ・クロ質煉瓦１２とスピネル質
煉瓦１３の相互配設をキルン軸方向に、材質境界線１の
前後において逓減した構造としたゼブラ構造の変形例で
あるが本発明の目的に最もかなったライニングの一例で
ある。前記逓減方式としては焼成帯２からコーチング着
脱帯３に向って、マグ・クロ質煉瓦：スピネル質煉瓦を
例えば５：１→１：５の如く配設、内張りする。従っ
て、コーチング着脱帯３に向ってはスピネル煉瓦１３の
割合が増加する構造である。FIG. 3 shows a modified example of the zebra structure in which the arrangement of the mag-chrome brick 12 and the spinel brick 13 is gradually reduced in the kiln axis direction before and after the material boundary 1. This is an example of the lining most suitable for the purpose. As the above-mentioned decreasing method, a mag-chrome brick: a spinel brick is arranged and lined from the firing zone 2 to the coaching removable zone 3 in a ratio of, for example, 5: 1 → 1: 5. Therefore, the structure of the spinel brick 13 increases toward the coaching detachable band 3.
【００１６】図４は図１の構造でのコーチング付着状態
を示すロータリーキルンの材質境界線１附近の縦断面図
であり、スピネル質煉瓦１３の内張り内面にコーチング
層４が付着し、安定した操業が確保され、各煉瓦の磨耗
損傷を抑制し、内張り煉瓦寿命の延命が図れる。FIG. 4 is a longitudinal sectional view of the rotary kiln near the material boundary 1 showing the state of adhesion of the coating in the structure of FIG. 1. The coating layer 4 adheres to the inner lining of the spinel brick 13 and stable operation is achieved. As a result, wear and damage of each brick can be suppressed, and the life of the lining brick can be extended.
【００１７】この場合ゼブラ構造におけるコーチングの
付着は当然マグ・クロ質煉瓦に優先的に付着するが、そ
の部分から次第にコーチング層が生長、発達し、スピネ
ル質面でのコーチング付着をうながし更には両煉瓦表面
でのコーチングの一体化が進む。In this case, the adhesion of the coating in the zebra structure naturally adheres preferentially to the mag-chrome brick, but the coating layer gradually grows and develops from that part, and the adhesion of the coating on the spinel surface is further promoted. The integration of coaching on the brick surface proceeds.
【００１８】以上セメントロータリーキルンについて詳
述したが、他の目的のロータリーキルンにも本発明を適
用し得ることは当業者に自明のところである。Although the cement rotary kiln has been described in detail above, it is obvious to those skilled in the art that the present invention can be applied to a rotary kiln for other purposes.
【００１９】[0019]
【発明の効果】（１）本発明により操業の変動による材
質境界線付近の内張り煉瓦の損傷を抑制しうるもので、
焼成帯耐火煉瓦とコーチング着脱帯耐火煉瓦の必要に応
じた自由な選択組合せが可能となる。(1) According to the present invention, it is possible to suppress the damage to the lining brick near the material boundary line due to the fluctuation of the operation,
It is possible to freely select and combine the firing zone refractory brick and the coaching detachable zone refractory brick as required.
【００２０】（２）すなわち、縞状に張り合せたゼブラ
構造とすることにより： １）ロータリーキルンの操業条件の変化に対応可能とな
り、境界部付近の内張り煉瓦の延命が図られる。(2) That is, by using a zebra structure in which stripes are adhered to each other: 1) It is possible to cope with a change in the operating conditions of the rotary kiln, and the life of the lining brick near the boundary is extended.
【００２１】２）理想的なコーチング付着によりスムー
ズな原料流れとなるため、耐火煉瓦の磨耗損傷が減少す
るばかりでなく、セメント原料の流出量の増加にも寄与
する。2) Since the flow of the raw material is smooth due to the ideal adhesion of the coating, not only the abrasion damage of the refractory brick is reduced, but also the amount of the flow of the cement raw material is increased.
【図１】本発明ゼブラ構造を円周方向に配設した展開図FIG. 1 is a developed view in which a zebra structure of the present invention is arranged in a circumferential direction.
【図２】本発明ゼブラ構造をキルンの軸方向に配設した
展開図FIG. 2 is a developed view in which the zebra structure of the present invention is disposed in the axial direction of the kiln.
【図３】本発明のゼブラ構造をキルンの軸方向に逓減し
た例を示す展開図FIG. 3 is a developed view showing an example in which the zebra structure of the present invention is gradually reduced in the axial direction of the kiln.
【図４】コーチングの付着状態を示す縦断面図FIG. 4 is a longitudinal sectional view showing a state of adhesion of the coaching.
１ 材質境界線 ２ 焼成帯 ３ コーチング着脱帯 ４ コーチング層 ５ 鉄皮 １２ マグ・クロ質煉瓦 １３ スピネル質煉瓦 DESCRIPTION OF SYMBOLS 1 Material boundary line 2 Firing zone 3 Coating detachable zone 4 Coating layer 5 Steel 12 Mag-chrome brick 13 Spinel brick
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭62−29092（ＪＰ，Ｕ) 鋳造技術講座編集委員会編 鋳造技術 講座11「燃料・耐火物」日刊工業新開発 行 233−255頁（昭44−８−25) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Utility Model Sho-62-29092 (JP, U) Casting Technology Course Editing Committee Ed. (Showa 44-8-25)
Claims (2)
帯とコーチング着脱帯とに各々内張りされた耐火材質の
境界部を、マグ・クロ質煉瓦とスピネル質煉瓦とをロー
タリーキルンの軸方向に縞状に張り合せたゼブラ構造と
したことを特徴とする、ロータリーキルンの内張り構
造。1. A boundary portion of a refractory material, which is lined with a firing zone and a coaching detachable zone in a rotary kiln lining, in which a mag-chrome brick and a spinel brick are stuck in a strip shape in the axial direction of the rotary kiln. A rotary kiln lining structure with a zebra structure.
リーキルンの軸方向に逓減する請求項１記載のロータリ
ーキルンの内張り構造。2. The rotary kiln lining structure according to claim 1, wherein the different types of bricks having the zebra structure gradually decrease in the axial direction of the rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050593A JP2813091B2 (en) | 1992-03-09 | 1992-03-09 | Rotary kiln lining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050593A JP2813091B2 (en) | 1992-03-09 | 1992-03-09 | Rotary kiln lining structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05248767A JPH05248767A (en) | 1993-09-24 |
| JP2813091B2 true JP2813091B2 (en) | 1998-10-22 |
Family
ID=12863274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4050593A Expired - Fee Related JP2813091B2 (en) | 1992-03-09 | 1992-03-09 | Rotary kiln lining structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2813091B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8967998B2 (en) | 2011-05-05 | 2015-03-03 | Magnesita Refractories Company | Rotary kiln lining and method |
| CN102980392B (en) * | 2012-12-26 | 2015-04-08 | 中冶长天国际工程有限责任公司 | Composite reinforced rotary kiln inner liner |
| RU2647044C2 (en) * | 2013-12-20 | 2018-03-13 | 9282-3087 Квебек (Дба Тмс Канада) | Metallurgical furnace |
| CN105091568A (en) * | 2015-08-24 | 2015-11-25 | 安徽芜湖海螺建筑安装工程有限责任公司 | Method for constructing refractory bricks at deformed parts of barrel in rotary cement kiln |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6229092U (en) * | 1985-08-07 | 1987-02-21 |
-
1992
- 1992-03-09 JP JP4050593A patent/JP2813091B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 鋳造技術講座編集委員会編 鋳造技術講座１１「燃料・耐火物」日刊工業新開発行 ２３３−２５５頁（昭４４−８−２５） |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05248767A (en) | 1993-09-24 |
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