JP2001302363A - Magnesia-alumina-based spinel refractory - Google Patents

Magnesia-alumina-based spinel refractory

Info

Publication number
JP2001302363A
JP2001302363A JP2000168269A JP2000168269A JP2001302363A JP 2001302363 A JP2001302363 A JP 2001302363A JP 2000168269 A JP2000168269 A JP 2000168269A JP 2000168269 A JP2000168269 A JP 2000168269A JP 2001302363 A JP2001302363 A JP 2001302363A
Authority
JP
Japan
Prior art keywords
magnesia
alumina
raw material
brick
based spinel
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
JP2000168269A
Other languages
Japanese (ja)
Inventor
Kazunari Imai
一成 今井
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.)
OSAKA YOGYO FIRE BRICK
Yotai Refractories Co Ltd
Original Assignee
OSAKA YOGYO FIRE BRICK
Yotai Refractories Co Ltd
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 OSAKA YOGYO FIRE BRICK, Yotai Refractories Co Ltd filed Critical OSAKA YOGYO FIRE BRICK
Priority to JP2000168269A priority Critical patent/JP2001302363A/en
Publication of JP2001302363A publication Critical patent/JP2001302363A/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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite

Abstract

PROBLEM TO BE SOLVED: To provide a refractory brick which is excellent in corrosion resistance, spalling resistance and coating fixability in comparison with a conventional magnesia-alumina-based spinel brick and which is free from chromium, thereby it exhibits enhanced durability as a brick for a cement kiln and has a wider range of application. SOLUTION: The magnesia-alumina-based spinel brick is obtained from a raw material which contains, as main raw materials, a magnesia-based raw material and a magnesia-alumina-based spinel raw material and, as a subsidiary raw material, a magnesia-alumina-based spinel raw material containing 10 to 20 wt.% Fe2O3.

Description

【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、セメントおよび石灰焼
成ロータリーキルンなどに使用される、コーチング付着
性と耐スポーリング性に優れたマグネシア−アルミナ系
スピネル質耐火物に関わるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnesia-alumina-based spinel refractory having excellent coating adhesion and spalling resistance, which is used in a cement or lime burning rotary kiln.

【０００２】[0002]

【従来の技術】従来、セメントおよび石灰焼成ロータリ
ーキルン用耐火物として、マグネシア−クロム系耐火物
やマグネシア−アルミナ系耐火物が幅広く使用されてい
る。2. Description of the Related Art Conventionally, magnesia-chromium-based refractories and magnesia-alumina-based refractories have been widely used as refractories for cement and lime burning rotary kilns.

【０００３】マグネシア−クロム系耐火物は、コーチン
グの付着性は優れているが、クロムを含んでいるため使
用後れんがの処理に問題が生じている。[0003] Magnesia-chromium refractories have excellent adhesion of the coating, but have problems in the treatment of the brick after use because they contain chromium.

【０００４】一般にマグネシア−アルミナ系スピネル質
耐火物は、その成分がＭｇＯおよびＡｌ２Ｏ３から構成
されているが、コーチングの付着性はマグネシア−クロ
ム系耐火物に比べ劣る。In general, magnesia-alumina-based spinel refractories are composed of MgO and Al 2 O 3, but the adhesion of coating is inferior to that of magnesia-chromium-based refractories.

【０００５】マグネシア−アルミナ系スピネル質耐火物
のコーチング付着性を向上させるために、Ｆｅ２Ｏ３を
含有させた耐火物が例えば、特公昭６０−３４５１３号
や特開平４−２３８８５５号に開示されている。[0005] In order to improve the coating adhesion of magnesia-alumina spinel refractories, refractories containing Fe 2 O 3 are disclosed in, for example, JP-B-60-34513 and JP-A-4-238855. ing.

【０００６】[0006]

【発明が解決しようとする課題】従来のマグネシア−ア
ルミナ系スピネル質耐火物は、コーチングの付着性に劣
ることから、Ｆｅ２Ｏ３を含有させコーチング付着性を
向上させているが、その含有量が少ないとコーチングの
付着が十分でなく、また含有量が多くなると耐スポーリ
ング性や耐食性が低下する。本発明では、マグネシア−
アルミナ系スピネル質耐火物のコーチング付着性および
耐スポーリング性を向上させ、耐用の向上を図ることを
目的とする。The conventional magnesia-alumina-based spinel refractories have poor adhesion of the coating, and therefore contain Fe 2 O 3 to improve the adhesion of the coating. If the content is small, the adhesion of the coating is not sufficient, and if the content is large, the spalling resistance and the corrosion resistance are reduced. In the present invention, magnesia
An object of the present invention is to improve the coating adhesion and spalling resistance of an alumina-based spinel refractory, and to improve the durability.

【０００７】[0007]

【課題を解決するための手段】本発明は、Ｆｅ２Ｏ３を
１０〜２０重量％含有するマグネシア−アルミナ系スピ
ネル質原料を添加することで、れんが内のＦｅ２Ｏ３を
３〜６重量％としたマグネシア−アルミナ系スピネル質
耐火物に係る。According to the present invention, a magnesia-alumina-based spinel material containing 10 to 20% by weight of Fe 2 O 3 is added to reduce the amount of Fe 2 O 3 in a brick to 3 to 6% by weight. % Of magnesia-alumina spinel type refractory.

【０００８】[0008]

【作用】Ｆｅ２Ｏ３を含む耐火物は、セメント原料中の
ＣａＯおよびＡｌ２Ｏ３とれんがの熱面で反応し４Ｃａ
Ｏ・Ａｌ２Ｏ３・Ｆｅ２Ｏ３なる鉱物を生じ、これがコ
ーチングの付着性を向上させる。[Action] refractories containing Fe 2 O 3 reacts with hot surfaces of the CaO and Al 2 O 3 and brick in the cement raw material 4Ca
O · Al 2 O 3 · Fe 2 O 3 consisting produce minerals, which improve the adhesion of the coating.

【０００９】一方で、Ｆｅ２Ｏ３はれんがの焼結を促進
させ、れんがの耐スポーリング性を低下させる。On the other hand, Fe 2 O 3 promotes sintering of the brick and lowers the spalling resistance of the brick.

【００１０】この課題を解決するためには、Ｆｅ２Ｏ３
を１０〜２０重量％含有させたマグネシア−アルミナ系
スピネル質原料を使用することで、耐火物中のＦｅ２Ｏ
３量の制御を行い、同時にマグネシア質原料と熱膨張の
異なる原料を導入することで耐スポーリング性を向上さ
せることができる。In order to solve this problem, Fe 2 O 3
-Magnesia-alumina-based spinel material containing 10 to 20% by weight of Fe 2 O in the refractory
The spalling resistance can be improved by controlling the three amounts and simultaneously introducing a magnesia material and a material having a different thermal expansion.

【００１１】Ｆｅ２Ｏ３を含有するマグネシア−アルミ
ナ系スピネル質原料において、Ｆｅ２Ｏ３が１０重量％
未満では、コーチングの付着性を向上させるためにれん
がにＦｅ２Ｏ３を３重量％以上含有させることが必要な
ため、れんが製造時にＦｅ２Ｏ ３を含有するマグネシア
−アルミナ系スピネル質原料を３０重量％以上使用する
こととなり、この場合、原料間の熱膨張差の効果が少な
くなり耐スポーリング性に劣る。一方２０重量％より多
い場合はセメント原料との反応が大きくなり耐食性に劣
る。[0011] magnesia containing Fe 2 O 3 - In alumina-spinel raw material, Fe 2 O 3 is 10 wt%
By weight, because bricks be necessary to contain Fe 2 O 3 3% by weight or more in order to improve the coating adhesion property, magnesia containing Fe. 2O 3 during brick manufacture - 30 wt alumina spinel feedstock % Or more, and in this case, the effect of the difference in thermal expansion between the raw materials is reduced, resulting in poor spalling resistance. On the other hand, when the content is more than 20% by weight, the reaction with the cement raw material is increased and the corrosion resistance is poor.

【００１２】Ｆｅ２Ｏ３を１０〜２０重量％含有するマ
グネシア−アルミナ系スピネル質原料の配合量が１５重
量％未満では、れんがのＦｅ２Ｏ３の含有量が少なくな
り、コーチング付着性が十分とはいえない。一方３０重
量％以上では耐スポーリング性に劣る。[0012] Fe 2 O 3 10 to 20 wt% content to magnesia - When the amount of the alumina spinel raw material is less than 15% by weight, the less the content of Fe 2 O 3 of the brick, coaching adhesion is sufficiently Not really. On the other hand, if it is 30% by weight or more, spalling resistance is poor.

【００１３】本発明のＦｅ２Ｏ３を含有するマグネシア
−アルミナ系スピネル質原料の原料として酸化鉄として
通常市販されている第二酸化鉄やべんがらが使用でき
る。マグネシア源としては、焼結あるいは電融クリンカ
ーが使用できる。アルミナ源としては、焼結あるいは電
融クリンカーが使用できる。As the raw material of the magnesia-alumina-based spinel material containing Fe 2 O 3 of the present invention, ferric oxide or bengar, which is usually commercially available as iron oxide, can be used. As a magnesia source, a sintered or electrofused clinker can be used. Sintered or electrofused clinker can be used as the alumina source.

【００１４】本発明のマグネシア−アルミナ系スピネル
質耐火物のマグネシア質原料としては、焼結あるいは電
融クリンカーが使用できる。マグネシア−アルミナ系ス
ピネル質原料としては焼結あるいは、電融クリンカーが
使用できる。As the magnesia raw material of the magnesia-alumina spinel refractory of the present invention, a sintered or electrofused clinker can be used. Sintered or electrofused clinker can be used as the magnesia-alumina spinel material.

【００１５】本発明の耐火れんがの混練，成形，乾燥，
焼成の方法は通常の製造方法と同じである。混練時の結
合剤としては、通常使用されているにがり、糖蜜，リグ
ニンスルホン酸塩などが使用できる。The refractory brick of the present invention is kneaded, formed, dried,
The firing method is the same as the usual manufacturing method. As the binder at the time of kneading, commonly used bittern, molasses, lignin sulfonate, and the like can be used.

【００１６】[0016]

【実施例】Ｆｅ２Ｏ３を含有するマグネシア−アルミナ
系スピネル質原料は、所定比率で混合した原料を混合
し、所定の形状に成形したのち焼成して合成した。実施
例および比較例に使用した原料の配合比率を表１に示
す。EXAMPLE A magnesia-alumina-based spinel material containing Fe 2 O 3 was synthesized by mixing materials mixed at a predetermined ratio, forming the mixture into a predetermined shape, and then firing. Table 1 shows the mixing ratios of the raw materials used in the examples and comparative examples.

【００１７】[0017]

【表１】 [Table 1]

【００１８】表２に実施例および比較例を示す。Table 2 shows Examples and Comparative Examples.

【００１９】[0019]

【表２】 [Table 2]

【００２０】実施例１〜３および比較例６〜７は、Ｆｅ
２Ｏ３を１０〜２０重量％含むマグネシア−アルミナ系
スピネル原料の配合量およびれんがに含まれるＦｅ２Ｏ
３の量を比較したものである。Ｆｅ２Ｏ３を１０〜２０
重量％含むマグネシア−アルミナ系スピネル質原料の配
合量が１５重量％未満では、コーチングの付着性に劣
り、一方３０重量％を越えると耐スポーリング性が低下
する。In Examples 1 to 3 and Comparative Examples 6 to 7, Fe
The amount of the magnesia-alumina-based spinel material containing 10 to 20% by weight of 2 O 3 and the amount of Fe 2 O contained in the brick
3 is a comparison of the amounts. Fe 2 O 3 is 10 to 20
If the amount of the magnesia-alumina-based spinel material containing less than 15% by weight is less than 15% by weight, the adhesion of the coating is poor, and if it exceeds 30% by weight, the spalling resistance is reduced.

【００２１】実施例１，４，５，８，９は合成スピネル
質原料の比較である。Ｆｅ２Ｏ３の含有量が１０重量％
未満では耐スポーリング性に劣り、一方２０重量％を越
えると骨材自体の耐食性が低下するためれんがの耐食性
も低下する。Examples 1, 4, 5, 8, and 9 are comparisons of synthetic spinel materials. Fe 2 O 3 content of 10% by weight
If the amount is less than the above, the spalling resistance is inferior. On the other hand, if the amount exceeds 20% by weight, the corrosion resistance of the aggregate itself decreases, so that the corrosion resistance of the brick also decreases.

【００２２】[0022]

【発明の効果】本発明の耐火れんがは従来のマグネシア
−アルミナ系スピネル質耐火物に比べ、コーチングの付
着性および耐スポーリング性が優れており、セメントキ
ルン用の耐火れんがとして適用範囲の拡大や耐用向上に
効果がある。また、クロムを含んでいないため環境保護
に役立つ。The refractory brick of the present invention has excellent adhesiveness of coating and spalling resistance as compared with conventional magnesia-alumina-based spinel refractories, and can be applied as a refractory brick for cement kilns. Effective for improving durability. Also, because it does not contain chromium, it is useful for environmental protection.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】マグネシア質原料及び／又はマグネシア−
アルミナ系スピネル質原料７０〜８５重量％と、Ｆｅ２
Ｏ３を１０〜２０重量％含有するマグネシア−アルミナ
系スピネル質原料１５〜３０重量％を主原料とし、Ｆｅ
２Ｏ３を３〜６重量％含有することを特徴とするマグネ
シア−アルミナ系スピネル質耐火物。1. Magnesia raw material and / or magnesia
70-85% by weight of an alumina-based spinel material and Fe 2
The main raw material is a magnesia-alumina-based spinel material containing 10 to 20% by weight of O 3 ,
Magnesia, characterized in that it contains the 2 O 3 3 to 6 wt% - alumina spinel refractory.
JP2000168269A 2000-04-26 2000-04-26 Magnesia-alumina-based spinel refractory Pending JP2001302363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000168269A JP2001302363A (en) 2000-04-26 2000-04-26 Magnesia-alumina-based spinel refractory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000168269A JP2001302363A (en) 2000-04-26 2000-04-26 Magnesia-alumina-based spinel refractory

Publications (1)

Publication Number Publication Date
JP2001302363A true JP2001302363A (en) 2001-10-31

Family

ID=18671297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000168269A Pending JP2001302363A (en) 2000-04-26 2000-04-26 Magnesia-alumina-based spinel refractory

Country Status (1)

Country Link
JP (1) JP2001302363A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103058684A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density spinel brick used for rotary kiln and preparation method thereof
CN110066182A (en) * 2019-05-28 2019-07-30 江苏诺明高温材料股份有限公司 Utilize the method for pyrite cinder preparation magnesium-ferrum-aluminum composite material
RU2719291C1 (en) * 2019-03-06 2020-04-17 федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВО "ВГУ") Method of producing periclase-spinel ceramics
CN109400121B (en) * 2018-12-29 2022-02-11 河南新拓耐火材料有限公司 Unfired and non-soaked magnesium-aluminum sliding plate for ladle sliding gate and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103058684A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density spinel brick used for rotary kiln and preparation method thereof
CN109400121B (en) * 2018-12-29 2022-02-11 河南新拓耐火材料有限公司 Unfired and non-soaked magnesium-aluminum sliding plate for ladle sliding gate and preparation method thereof
RU2719291C1 (en) * 2019-03-06 2020-04-17 федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВО "ВГУ") Method of producing periclase-spinel ceramics
CN110066182A (en) * 2019-05-28 2019-07-30 江苏诺明高温材料股份有限公司 Utilize the method for pyrite cinder preparation magnesium-ferrum-aluminum composite material

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