JPH05248767A - Lining structure for rotary kiln - Google Patents
Lining structure for rotary kilnInfo
- Publication number
- JPH05248767A JPH05248767A JP5059392A JP5059392A JPH05248767A JP H05248767 A JPH05248767 A JP H05248767A JP 5059392 A JP5059392 A JP 5059392A JP 5059392 A JP5059392 A JP 5059392A JP H05248767 A JPH05248767 A JP H05248767A
- Authority
- JP
- Japan
- Prior art keywords
- bricks
- lining
- rotary kiln
- zone
- brick
- 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.)
- Granted
Links
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
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 of a rotary kiln firing zone and a coating / removal 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)は主にマグネ
シア・スピネル質煉瓦で内張りされている。2. Description of the Related Art A typical rotary kiln cement rotary kiln has a firing zone mainly lined with mag-chromic bricks, and a coaching attachment / detachment zone (hereinafter referred to as a detachment zone) Say) is mainly lined with magnesia 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。The refractory linings used for the firing zone and the detachable zone have brick characteristics (coating adhesion, spalling resistance, corrosion resistance, abrasion resistance, embrittlement resistance, and alkali resistance) so that they can be used in accordance with their respective usage 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 firing zone and the attachment / detachment zone are not constant 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. It is known that the fluctuations are repeated. Moreover, the positions of the firing zone and the detachable zone are changed by switching the cement firing type. As mentioned above, the firing zone and the detachment zone of the cement rotary kiln are divided according to the brick conditions according to the firing conditions, and there is a limit to how the lining refractory bricks can respond to changes in the furnace conditions due to operating conditions, etc. The durability near the brick lining boundary tends 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・クロ煉瓦に比
べ約1.3倍と高いため、鉄皮温度が上昇し(約350
°〜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。That is, the mug used in the firing zone
Chromic bricks are excellent in heat resistance and coating adhesion, but when placed under the conditions of the detaching zone of the coating, the brick is greatly damaged by spalling due to heat change, and the detaching zone is also large. The spinel bricks used in the above have excellent spalling resistance, but when they are placed under the conditions of firing zone, they are exposed to higher temperatures than under the conditions of detaching zone and their coating is better than that of mag and black bricks. Since the material does not adhere easily, the coating layer becomes insufficient, and as a result, the temperature becomes too high (heat resistance problem), it easily reacts with the lime component in the cement component and melts away, and the thermal conductivity is about the same as that of mag bricks. Since it is 1.3 times higher, the skin temperature rises (about 350
(° to 400 ° C.), the expansion difference between the iron shell and the brick causes slippage at the joint surface between them, which causes fatigue of the iron skin, and the large amount of heat dissipated is not preferable from the viewpoint of energy saving.
【0006】[0006]
【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、2種以上の耐火
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留して局部磨耗を生じ
る。The present inventors have developed the present invention as a result of various examinations and experiments in order to solve the above-mentioned various defects of the conventional system, and the technical constitution of the present invention. Is characterized by having a zebra structure in which two or more types of refractory bricks are laminated in a stripe pattern at the boundary of the lining material between the firing zone and the coating / removal zone in the lining of the rotary kiln. The disadvantages of each are compensated by the advantages of other qualities, and as a result, partial damage near the material boundary of the rotary kiln lining is suppressed and the difference in the coating thickness between the two lining bricks is mitigated and ideal coating adhesion is achieved. The rotary kiln lining structure reduces the abrasion damage of bricks due to the smooth flow of raw materials, maintains a good furnace condition, and thus extends the life of lining bricks. Is shall. If there is a step in the coating thickness, the raw material stays and local wear occurs.
【0007】本発明においてゼブラ構造とは、ロータリ
ーキルン内張りのリング単位で円周方向に、ロータリー
キルンの軸方向に又はロータリーキルンの軸に対して斜
め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、以上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。In the present invention, the zebra structure means a ring unit lined with a rotary kiln, which is arranged in a circumferential direction, in the axial direction of the rotary kiln, or in a stripe pattern obliquely to the axis of the rotary kiln, or gradually reduced in the axial direction of the kiln. This is an array and will be specifically described with reference to the accompanying drawings. These drawings are development views showing the arrangement positions of the refractory bricks on the lining of the rotary kiln, and an example of the cement rotary kiln will be described.
【0008】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の附近の内張りはキルン内壁のリング単位にマグ
・クロ煉瓦12及びスピネル煉瓦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 stripes in the circumferential direction on a ring-by-ring basis. Reference numeral 1 is a material boundary line between the firing zone 2 and the coating / decoupling zone 3, and the lining near the border line 1 is a ring unit on the inner wall of the kiln in which mag-black bricks 12 and spinel bricks 13 are alternately partitioned in stripes. This is an example of lining.
【0009】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
よりダイレクトボンドマグ・クロ煉瓦、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
して抵抗力のあるマグネシア・スピネル煉瓦を用いるこ
とが一般的である。図1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・クロ煉瓦12とスピネル煉瓦13
との縞状のゼブラ構造としてあるが、必要に応じて5〜
20リングあるいはそれ以上にゼブラ構造の範囲を拡大
することができる。As the refractory brick 12 of the firing zone 2, it is common to use direct bond mag black bricks or mag dolomite bricks due to thermal load, corrosion resistance to external components, stability of coating, and the like. As the refractory brick 13 of the coating / removal zone 3, it is general to use a magnesia spinel brick having resistance to spalling caused by repeated coating / removal due to temperature change. In the example of FIG. 1, the bricks 12 and 13 are alternately arranged and lined (1: 1), but these combinations can be changed depending on the conditions of use of the kiln. Further, in the illustrated example, the mag-black brick 12 and the spinel brick 13 are equally placed on the left and right around the material boundary line 1.
It has a striped zebra structure with, but if necessary, 5
The range of zebra structures can be expanded to 20 rings or more.
【0010】図2は本発明の他の例を示し、材質境界線
1の前後をキルン軸方向にマグ・クロ煉瓦12とスピネ
ル煉瓦13をゼブラ構造に配設、内張りした例であり、
このゼブラ構造の範囲はキルンの使用条件に応じて任意
に決定することができる。FIG. 2 shows another example of the present invention, which is an example in which a mag-black brick 12 and a spinel brick 13 are arranged in a zebra structure in the front and rear of the material boundary line 1 in the kiln axis direction and lined.
The range of this zebra structure can be arbitrarily determined according to the usage conditions of the kiln.
【0011】図3はマグ・クロ煉瓦12とスピネル煉瓦
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・クロ煉瓦:スピネル煉瓦を例えば
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 modification of the zebra structure in which the mutual arrangement of the mag black bricks 12 and the spinel bricks 13 is gradually decreased in the kiln axis direction before and after the material boundary line 1, but for the purpose of the present invention. This is an example of the best lining. As the gradual reduction method, mag / black bricks: spinel bricks are arranged and lined from the firing zone 2 to the coating / decoupling zone 3 in a ratio of, for example, 5: 1 → 1: 5. Therefore, the ratio of the spinel bricks 13 increases toward the coaching attachment / detachment zone 3.
【0012】図4は市松構造(斜めゼブラ構造)の例を
示し、符号は前述の例と同一部材を示す。FIG. 4 shows an example of a checkered structure (oblique zebra structure), and the reference numerals indicate the same members as the above-mentioned example.
【0013】図5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. 5 is a vertical cross-sectional view of the rotary kiln in the structure of FIG. 1 showing the state where the material is coated around the rotary kiln, and the coating layer 4 is attached to the inner surface of the spinel brick 13 to ensure stable operation. As a result, the abrasion damage of each brick is suppressed, and the life of the lining brick can be extended.
【0014】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-black brick, but the coating layer gradually grows and develops from that portion, which promotes the adhesion of the coating on the spinel surface and further the bricks. The integration of coaching on the surface progresses.
【0015】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 the rotary kiln for other purposes.
【0016】[0016]
(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 damage to the lining bricks near the material boundary line due to fluctuations in operation, and it is possible to freely select and combine fired zone refractory bricks and coaching removable zone refractory bricks as needed.
【0017】(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 adopting a striped zebra structure: 1) It becomes possible to cope with changes in the operating conditions of the rotary kiln, and the life of the lining brick near the boundary can be extended.
【0018】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、セメント原料の焼出量の増加にも寄与
する。2) The ideal raw material flow due to the adhered coating will not only reduce the abrasion and damage of the refractory brick, but also contribute to the increase of the amount of cement raw material burned out.
【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 development view in which the zebra structure of the present invention is arranged in the circumferential direction.
【図2】本発明の他の例を示す展開図FIG. 2 is a development view showing another example of the present invention.
【図3】本発明のその他の例を示す展開図FIG. 3 is a development view showing another example of the present invention.
【図4】本発明による市松模様の展開図FIG. 4 is a development view of a checkerboard pattern according to the present invention.
【図5】コーチングの付着状態を示す縦断面図FIG. 5 is a vertical cross-sectional view showing an attached state of a coating.
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・クロ煉瓦 13 スピネル煉瓦 1 Material boundary line 2 Firing zone 3 Coating attachment / detachment zone 4 Coating layer 5 Iron skin 12 Mag-black brick 13 Spinel brick
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成4年5月7日[Submission date] May 7, 1992
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0003[Name of item to be corrected] 0003
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【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。The refractory linings used for the firing zone and the detachable zone have brick characteristics (coating adhesion, spalling resistance, corrosion resistance, abrasion resistance, embrittlement resistance, and alkali resistance) so that they can be used in accordance with their respective usage conditions. ) Etc., the bricks of the above-mentioned quality are lined.
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0015[Correction target item name] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0015】以上セメントロータリーキルンの焼成帯と
着脱帯について詳述したが、他の部位についても適応で
き、又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。 ─────────────────────────────────────────────────────
Above is the firing zone of the cement rotary kiln
I explained the detachable band in detail, but it is applicable to other parts as well.
Can also be in a rotary kiln for other purposes to which the present invention is applicable is where obvious to those skilled in the art. ─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成5年5月10日[Submission date] May 10, 1993
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Name of item to be corrected] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 ロータリーキルンの内張り構造[Title of Invention] Lining structure of rotary kiln
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【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 of a rotary kiln firing zone and a coating / removal 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 A typical rotary kiln cement rotary kiln has a firing zone mainly lined with mag-chromic bricks, and a coaching attachment / detachment zone (hereinafter referred to as a detachment zone) Say) 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。The refractory linings used for the firing zone and the detachable zone have brick characteristics (coating adhesion, spalling resistance, corrosion resistance, abrasion resistance, embrittlement resistance, and alkali resistance) so that they can be used in accordance with their respective usage 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 firing zone and the attachment / detachment zone are not constant 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. It is known that the fluctuations are repeated. Moreover, the positions of the firing zone and the detachable zone are changed by switching the cement firing type. As mentioned above, the firing zone and the detachment zone of the cement rotary kiln are divided according to the brick conditions according to the firing conditions, and there is a limit to how the lining refractory bricks can respond to changes in the furnace conditions due to operating conditions, etc. The durability near the brick lining boundary tends 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。That is, the mug used in the firing zone
Chromic bricks are excellent in heat resistance and coating adhesion, but when placed under the conditions of the detaching zone of the coating, the brick is greatly damaged by spalling due to heat change, and the detaching zone is also large. The spinel bricks used in the above have excellent spalling resistance, but when exposed to the conditions of the firing zone, they are exposed to higher temperatures than under the conditions of the detachment zone and the coating is superior to that of mag-chromic bricks. The coating layer is inadequate because it is hard to adhere to it, and as a result, the temperature becomes too high (heat resistance problem), it easily reacts with the lime component in the cement component and is melted, and the thermal conductivity of mag-chromic bricks is high. It is about 1.3 times higher than the above, so the skin temperature rises (about 3
(50 ° to 400 ° C.), the expansion difference between the iron shell and the brick causes slippage at the joint surface of the iron shell and the brick, which causes fatigue of the iron shell and the large amount of heat dissipated is not preferable in terms 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。[0006] Various attempts have been proposed in order to improve the drawback that the durability of these different kinds of bricks near the lining boundary tends to deteriorate.
【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, a cement rotary kiln furnace wall refractory structure constructed by combining and constructing a domite refractory and a spinel refractory in an alternating arrangement pattern (actually developed 62-2).
9092), but C in dolomite refractory
It is mentioned that aO and Al 2 O 3 in the spinel refractory easily react to form a low melting point 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。Therefore, the joint damage between the dolomite refractory material and the spinel refractory material in contact with each other is large, the wear rate is large, 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 examinations and experiments in order to solve the above-mentioned various defects of the conventional system, and the technical constitution of the present invention. Has a zebra structure in which the refractory bricks of mag-chromic bricks and spinel bricks are pasted together in a striped pattern at the boundary of the lining material between the firing zone and the coating / decoupling zone of the rotary kiln lining. By adopting such a configuration, each disadvantage is compensated by the advantages of other qualities, and as a result, partial damage near the material boundary of the rotary kiln lining is suppressed and the difference in coating thickness between the two bricks is mitigated. A rotary that can achieve ideal coaching adhesion, reduce brick abrasion damage due to smooth material flow, and maintain good furnace conditions, thus extending the life of lining bricks. There is provided a Lung lining structure. If there is a step difference in the coating thickness, the raw material stays and local wear occurs.
【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。In the present invention, the zebra structure refers to an arrangement in which the inner lining of the rotary kiln 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, which will be specifically described below with reference to the accompanying drawings. .. These drawings are development views showing the arrangement positions of the refractory bricks on 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 ring unit of the lining in the circumferential direction, and FIG. 2 shows an example in which the zebra structure lining of the present invention is arranged in the axial direction of the kiln in a striped manner. Reference numeral 1 is a material boundary line between the firing zone 2 and the coating / decoupling attachment / detachment zone 3. The lining near the boundary line 1 is a ring unit of the inner wall of the kiln in FIG. 1, and a mag-chromic brick in the axial direction of the kiln in FIG. In this example, 12 and spinel brick 13 are alternately lined up in 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 of the present invention has a chemical composition of 50 to 95% by weight of MgO and C.
r 2 O 3 is a refractory composed mainly of 1 to 40% by weight, and spinel bricks are those containing spinel clinker in a range of 50% by weight or less, magnesia clinker and alumina clinker. As the main component,
A refractory material in which spinel (MgO.Al 2 O 3 ) is generated 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。図1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。As the refractory bricks 12 of the firing zone 2, it is general to use mag-chromic bricks or mag-dolomite bricks due to thermal load, corrosion resistance to external components, stability of coating and the like. Further, as the refractory brick 13 of the coating / removal zone 3, it is common to use a spinel brick having resistance to spalling caused by repeated coating / removal due to temperature change. In the example of FIG. 1, the bricks 12 and 13 are alternately arranged and lined (1: 1), but these combinations can be changed depending on the conditions of use of the kiln. Further, in the example shown in the figure, the mag-chromic bricks 12 and the spinel bricks 13 are arranged in the axially striped zebra structure with the material boundary line 1 as the center.
【0014】なお、焼成帯12にマグ・ドロマイト煉瓦
を用いるときは、スピネル質煉瓦13との接触を避けス
ピネル質煉瓦との接触部はマグ・クロ質煉瓦にすること
が好ましい。When using a mag-domite brick for the firing zone 12, it is preferable to avoid contact with the spinel brick 13 and to use a mag-chrom brick for the contact portion with the spinel brick.
【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 mutual arrangement of the mag-chromic bricks 12 and the spinel bricks 13 is gradually decreased in the kiln axis direction before and after the material boundary line 1. This is an example of a lining that best serves the purpose. As the gradual decrease method, mag-chromic bricks: spinel bricks are arranged and lined from the firing zone 2 to the coating / decoupling zone 3 in a ratio of, for example, 5: 1 → 1: 5. Therefore, the ratio of the spinel bricks 13 increases toward the coaching attachment / detachment zone 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 vertical cross-sectional view of the rotary kiln in the structure of FIG. 1 showing the state where the material is coated around the material boundary line 1 of the rotary kiln. The inner surface of the spinel brick 13 is coated with the coating layer 4 to ensure stable operation. It is ensured that abrasion of each brick is suppressed and the life of the lining brick is 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-chromic brick, but the coating layer gradually grows and develops from that portion, which promotes the adhesion of the coating on the spinel surface and further The integration of coaching on the brick surface progresses.
【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 the 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。EFFECTS OF THE INVENTION (1) According to the present invention, it is possible to suppress the damage of the lining bricks near the material boundary line due to the fluctuation of the operation, and the firing zone refractory bricks and the detachable zone refractory bricks can be freely selected and combined. Is possible.
【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 adopting a striped zebra structure: 1) It is possible to cope with changes in the operating conditions of the rotary kiln, and it is possible to prolong the life of the lining brick near the boundary.
【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) The ideal raw material flow due to the adhered coating will not only reduce the abrasion damage of the refractory bricks, but also contribute to the increase of the amount of cement raw material flowing out.
【図面の簡単な説明】[Brief description of drawings]
【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 development view in which the zebra structure of the present invention is arranged in the 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 development view in which the zebra structure of the present invention is arranged 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 development 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 vertical cross-sectional view showing an attached state of a coating.
【符号の説明】 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[Explanation of symbols] 1 Material boundary line 2 Firing zone 3 Coating attachment / detachment zone 4 Coating layer 5 Iron skin 12 Mag-chromic brick 13 Spinel brick
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】全図[Correction target item name] All drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図1】 [Figure 1]
【図2】 [Fig. 2]
【図3】 [Figure 3]
【図4】 [Figure 4]
Claims (5)
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、2種以上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する、ロータリーキルンの内
張り構造。1. A zebra structure in which two or more types of refractory bricks are laminated in a striped manner at a boundary portion of a refractory material lined in each of a firing zone and a coaching attachment / detachment zone in a lining of a rotary kiln. , Rotary kiln lining structure.
りのリング単位で円周方向とした請求項1記載のロータ
リーキルンの内張り構造。2. The lining structure of a rotary kiln according to claim 1, wherein the zebra structure is circumferentially arranged in a ring unit of the rotary kiln lining.
方向である請求項1記載のロータリーキルンの内張り構
造。3. The lining structure of a rotary kiln according to claim 1, wherein the zebra structure is in the axial direction of the rotary kiln.
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。4. The lining structure for a rotary kiln according to claim 1, wherein the different types of bricks having the zebra structure gradually decrease in the axial direction of the rotary kiln.
1記載のロータリーキルンの内張り構造。5. The rotary kiln lining structure according to claim 1, wherein the zebra structure is a checkered structure.
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 true JPH05248767A (en) | 1993-09-24 |
JP2813091B2 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) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102980392A (en) * | 2012-12-26 | 2013-03-20 | 中冶长天国际工程有限责任公司 | Composite reinforced inner liner rotary kiln |
US8967998B2 (en) | 2011-05-05 | 2015-03-03 | Magnesita Refractories Company | Rotary kiln lining and method |
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 |
CN108613555A (en) * | 2013-12-20 | 2018-10-02 | 魁北克9282-3087公司(加钛顾问公司) | The method of metallurgical furnace and the existing flame retardant coating of repacking for smelting mineral |
Citations (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
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6229092U (en) * | 1985-08-07 | 1987-02-21 |
Cited By (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 |
CN102980392A (en) * | 2012-12-26 | 2013-03-20 | 中冶长天国际工程有限责任公司 | Composite reinforced inner liner rotary kiln |
CN108613555A (en) * | 2013-12-20 | 2018-10-02 | 魁北克9282-3087公司(加钛顾问公司) | The method of metallurgical furnace and the existing flame retardant coating of repacking for smelting mineral |
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 |
Also Published As
Publication number | Publication date |
---|---|
JP2813091B2 (en) | 1998-10-22 |
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