JPH10212144A - Brick for cement rotary kiln - Google Patents

Brick for cement rotary kiln

Info

Publication number
JPH10212144A
JPH10212144A JP9026078A JP2607897A JPH10212144A JP H10212144 A JPH10212144 A JP H10212144A JP 9026078 A JP9026078 A JP 9026078A JP 2607897 A JP2607897 A JP 2607897A JP H10212144 A JPH10212144 A JP H10212144A
Authority
JP
Japan
Prior art keywords
brick
rotary kiln
cement rotary
water
tio2
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
Application number
JP9026078A
Other languages
Japanese (ja)
Inventor
Eiji Kawamoto
英司 川本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TYK Corp
Original Assignee
TYK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TYK Corp filed Critical TYK Corp
Priority to JP9026078A priority Critical patent/JPH10212144A/en
Publication of JPH10212144A publication Critical patent/JPH10212144A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5041—Titanium oxide or titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00577—Coating or impregnation materials applied by spraying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Ceramic Products (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PROBLEM TO BE SOLVED: To prolong the service life of a lining brick of a cement rotary kiln by spraying a titanium oxide based aq. solution on the surface part of the brick of the cement rotary kiln after constructed to improve cement coating property of the brick. SOLUTION: The aq. solution prepared by dispersing a fine TiO2 powder in water is sprayed on the surface part of the lining brick for the cement rotary kiln in the kiln after constructed. The TiO2 aq. solution is prepared only by dispersing the TiO2 fine powder in water by 45-70 pts.wt. per 100 pts.wt. water. Since a high purity TiO2 is very expensive, a natural rutile ore is used. As the lining brick used for the cement rotary kiln, a magnesia-chromium base having 15-18% porosity or a magnesia spinel base having 14-17% porosity is generally used and is a base material sufficiently sticking and infiltrating on the surface by spraying. After spraying, only the removal of water is necessary and is coped with by the usual drying before using.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明はセメントロータリー
キルン用内張りれんがのコーティング性を促進しその耐
用向上を主目的としたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has as its main object to promote the coating properties of a lining brick for a cement rotary kiln and to improve its durability.

【０００２】[0002]

【従来の技術】セメントロータリーキルン用れんがは半
溶融状のセメントクリンカーがれんがと反応し表面に接
着、成長しコーティング層としてれんがの損傷を抑制す
ることから、このコーティング性、つまりコーティング
が強固に接着し成長する特性の優劣がその耐用を決定す
る。従って、寿命延長のためれんがのコーティング性に
ついては数々の策が採られてきた。マグネシア−クロム
材質の場合、天然クロム鉱石が焼成時に収縮することに
よる空隙をアンカー効果として利用する策。あるいは天
然クロム鉱石が含有するＦe2Ｏ3成分とクリンカーとの
反応を促進させる策等が試みられている。一方、マグネ
シア−スピネル材質も同様に数々の策が採られているが
含有主成分組成がＭｇＯおよびＡｌ2Ｏ3でクリンカーと
溶解析出反応が生じないことから基本的にコーティング
性はマグネシア−クロム材質に比較すると劣る。結果と
して、れんがの材質組成改善のみでは不十分で他の手法
により改善を要するのが現状である。2. Description of the Related Art Brick for a cement rotary kiln reacts with a semi-molten cement clinker and reacts with the brick to adhere to and grow on the surface, thereby suppressing damage to the brick as a coating layer. The quality of the growing properties determines its service life. Therefore, various measures have been taken for coating properties of bricks to extend the life. In the case of magnesia-chromium material, a measure to utilize the void caused by contraction of natural chrome ore during firing as an anchor effect. Alternatively, measures have been attempted to promote the reaction between the Fe 2 O 3 component contained in natural chromium ore and clinker. On the other hand, a number of measures have been similarly adopted for the magnesia-spinel material, but since the main component composition is MgO and Al 2 O 3 and no dissolution and precipitation reaction occurs with the clinker, the coating property is basically magnesia-chromium material. Inferior to. As a result, at present, it is not enough to improve the material composition of the brick, and it is necessary to improve it by other methods.

【０００３】[0003]

【発明が解決しようとする課題】現在のセメントロータ
リーキルンの内張りれんがの寿命を延長するために、れ
んがのセメントコーティング性の改善を図った。SUMMARY OF THE INVENTION In order to extend the life of the brick lining of the current cement rotary kiln, the cement coating properties of the brick have been improved.

【０００４】[0004]

【課題を解決するための手段】セメントクリンカーの接
着機構は主成分であるＣaＯとれんが含有成分が反応し
液相の一部が固相化して堆積していく溶解析出反応と考
えられている。従って、ＣaＯ組成と１５００℃前後で
適度に反応、液相を生成する組成を調査した結果ＴｉＯ
2が挙げられた。図１にＣaＯ−ＴｉＯ2系相平衡状態図
を参考に示す。ただし、ＴｉＯ2をれんが全体に付加、
含有させた場合、１）添加量の増加に伴い低融物形成に
よる過剰な収縮が生じ耐スポーリング性が著しく低下す
る。２）れんが全体の耐食性が低下する。等の問題が生
じコーティング特性を改善するまでに到る程ＴｉＯ2を
含有させることはできない。そこで、コーティングの起
源となるれんが表面部のみにＴｉＯ2成分を付加する方
法を検討した。その結果ＴｉＯ2微粉を水に溶解し築炉
後炉内よりセメントロータリーキルン用内張りれんがの
表面部に吹き付け、コーティングしＴｉＯ2を付加する
ことを考えた。焼成後のれんがに吹き付け、付加するの
で耐スポーリング性、耐食性の低下もない。れんが製造
原料としてＴｉＯ2成分付加においての問題点はすべて
解決された。図２に吹き付け作業状況のイメージ図を示
す。ＴｉＯ2水溶液はＴｉＯ2微粉を水に溶かすのみで水
１００ｗｔ％に対し４５〜７０ｗｔ％程度を目安とし
た。又、高純度なＴｉＯ2は高価なため天然ルチル鉱の
微粉でも許容できる。セメントロータリーキルンに使用
されるセメントロータリーキルン用内張りれんがはマグ
ネシア−クロム質で気孔率は１５〜１８％、マグネシア
スピネル質で気孔率は１４〜１７％程度が一般的であり
十分吹き付けにより付着、表層浸潤する母体である。吹
き付け後は水分のみ除去すれば良いので使用前の通常乾
燥で対処できる。この方法により初期のセメントとの接
着が生れれんがの保護ができ寿命も大幅に延長された。
次に本発明を実施例により説明する。The bonding mechanism of cement clinker is considered to be a dissolution and deposition reaction in which CaO, which is the main component, and a brick-containing component react, and a part of the liquid phase is solidified and deposited. Therefore, as a result of investigating the composition which forms a liquid phase by reacting appropriately with the CaO composition at about 1500 ° C.
Two were mentioned. FIG. 1 shows a CaO-TiO 2 phase equilibrium diagram as a reference. However, TiO 2 is added to the whole brick,
When it is contained, 1) excessive shrinkage due to the formation of a low melt occurs with an increase in the added amount, and the spalling resistance is remarkably reduced. 2) The overall corrosion resistance of the brick is reduced. However, TiO 2 cannot be contained to the extent that the coating characteristics are improved. Therefore, a method of adding the TiO 2 component only to the surface of the brick, which is the origin of the coating, was studied. As a result, it was considered that TiO 2 fine powder was dissolved in water, and after the furnace was built, the surface of the lining brick for a cement rotary kiln was sprayed from the furnace and coated to add TiO 2 . Sprayed and added to the fired brick, so there is no decrease in spalling resistance and corrosion resistance. All the problems in the addition of TiO 2 component as a raw material for brick have been solved. FIG. 2 shows an image diagram of the spraying operation situation. The TiO 2 aqueous solution only dissolves the TiO 2 fine powder in water, and the standard is about 45 to 70 wt% with respect to 100 wt% of water. Since high-purity TiO 2 is expensive, fine particles of natural rutile ore can be tolerated. The lining brick for cement rotary kilns used in cement rotary kilns is generally magnesia-chromium and has a porosity of 15 to 18%, and magnesia spinel has a porosity of about 14 to 17%. The mother. After spraying, only moisture needs to be removed, so it can be dealt with by normal drying before use. This method provided early adhesion to the cement, provided protection for the brick, and greatly extended its life.
Next, the present invention will be described with reference to examples.

【０００５】[0005]

【実施例】セメントロータリーキルン用内張りれんが１
に酸化チタン水溶液を吹き付けた。吹き付け作業は一般
的なスプレー吹き付け機を用い築炉後炉内かられんが表
面に吹き付けた。れんがの組成は表１に示す。水溶液は
水１００ｗｔ％に対し天然ルチル鉱微粉を５０ｗｔ％溶
かした。そして１２０℃で１２時間乾燥しその後、使用
開始まで最高８００℃まで昇温した。築炉されたキルン
は内径４．２５ｍで吹き付け３．０〜２０．０ｍに施工
した。[Example] Cement rotary kiln lining brick 1
Was sprayed with an aqueous titanium oxide solution. The spraying operation was performed by using a general spray spraying machine and after the furnace was built, the brick surface was sprayed from inside the furnace. Table 1 shows the composition of the brick. In the aqueous solution, 50 wt% of natural rutile ore fine powder was dissolved in 100 wt% of water. After drying at 120 ° C. for 12 hours, the temperature was raised up to 800 ° C. until the start of use. The built kiln was sprayed with an inner diameter of 4.25 m and applied to 3.0 to 20.0 m.

【表１】 [Table 1]

【０００６】[0006]

【発明の効果】実施例で示された部位を７，４００時間
使用後残寸測定したら元寸２００ｍｍに対し１６０ｍｍ
であった。従来品は過去の平均で約１４０ｍｍであった
ため損傷速度で３３％低減を図ることができた。これは
まさしく初期からのコーティングが形成されたことに起
因し本発明の有効性が立証された。After measuring the remaining size of the portion shown in the example after using for 7,400 hours, 160 mm for the original size of 200 mm.
Met. Since the conventional product had an average of about 140 mm in the past, the damage speed could be reduced by 33%. This is because the coating was formed from the very beginning and the effectiveness of the present invention was proved.

【図面の簡単な説明】[Brief description of the drawings]

【図１】ＣaＯ−ＴｉＯ2系相平衡状態図である。FIG. 1 is a CaO—TiO 2 phase equilibrium diagram.

【図２】吹き付け作業状況を示すセメントロータリーキ
ルンの断面イメージ図である。FIG. 2 is a sectional image view of a cement rotary kiln showing a spraying operation situation.

【符号の説明】 １ セメントロータリーキルン用内張りれんが ２ 表面コーティング層 ３ スプレーノズル[Description of Signs] 1 Brick for cement rotary kiln 2 Surface coating layer 3 Spray nozzle

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 セメントロータリーキルン用れんがにお
いて、セメントロータリーキルンに築炉施工後、そのれ
んが表面部に酸化チタン系水溶液を吹き付けることによ
りコーティング特性を促進したことを特徴とするセメン
トロータリーキルン用れんが。Claims: 1. A brick for a cement rotary kiln, characterized in that after the furnace is installed on the cement rotary kiln, the coating properties are promoted by spraying a titanium oxide aqueous solution on the surface of the brick.
JP9026078A 1997-01-24 1997-01-24 Brick for cement rotary kiln Pending JPH10212144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9026078A JPH10212144A (en) 1997-01-24 1997-01-24 Brick for cement rotary kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9026078A JPH10212144A (en) 1997-01-24 1997-01-24 Brick for cement rotary kiln

Publications (1)

Publication Number Publication Date
JPH10212144A true JPH10212144A (en) 1998-08-11

Family

ID=12183613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9026078A Pending JPH10212144A (en) 1997-01-24 1997-01-24 Brick for cement rotary kiln

Country Status (1)

Country Link
JP (1) JPH10212144A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634096A (en) * 2015-02-14 2015-05-20 安徽芜湖海螺建筑安装工程有限责任公司 Chrome-free configuration structure of inner kiln refractory material of rotary cement kiln

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634096A (en) * 2015-02-14 2015-05-20 安徽芜湖海螺建筑安装工程有限责任公司 Chrome-free configuration structure of inner kiln refractory material of rotary cement kiln

Similar Documents

Publication Publication Date Title
KR930006333B1 (en) Magnesia-alumina type spinel clinker and method of producing refractory by using same
JPH10212144A (en) Brick for cement rotary kiln
JPH0223494B2 (en)
JPS6054258B2 (en) Method for producing flame spray powder
JP2874831B2 (en) Refractory for pouring
JP2679045B2 (en) Refractory composition and refractory brick manufactured using the same
JP3343297B2 (en) Fired refractory brick for lining
JPH10212145A (en) Lining brick for cement rotary kiln
JP6287918B2 (en) Manufacturing method of container for high temperature
JP4408552B2 (en) Alumina-magnesia castable refractories using magnesium carbonate as a magnesia source
JPH10182199A (en) Brick for cement rotary kiln
JP2881682B2 (en) Lining structure of rotary kiln firing zone
JP2991472B2 (en) Refractory for ladle lining
JPH10182200A (en) Brick for cement rotary kiln
JPH0428462A (en) Immersion nozzle for continuous casting and production thereof
JP3510642B2 (en) Magnesia clinker and manufacturing method thereof
CN108083828A (en) A kind of medium-sized cement-kiln grate-cooler wall castable
JPH0952169A (en) Refractory for tuyere of molten steel container
JP2999134B2 (en) Magnesia chrome refractory and cement rotary kiln
JPH05148042A (en) Monolithic refractory for casting
JP2001012859A (en) Lining refractory for rotary kiln
JPH0477366A (en) Castable monolithic refractory
JP4404515B2 (en) Unshaped refractories for waste treatment furnaces
JPS62168631A (en) Casting mold
JP2000351674A (en) Monolithic refractory material for blast furnace runner