JPH0288420A - Production of spinel clinker - Google Patents
Production of spinel clinkerInfo
- Publication number
- JPH0288420A JPH0288420A JP63239756A JP23975688A JPH0288420A JP H0288420 A JPH0288420 A JP H0288420A JP 63239756 A JP63239756 A JP 63239756A JP 23975688 A JP23975688 A JP 23975688A JP H0288420 A JPH0288420 A JP H0288420A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- magnesium hydroxide
- particles
- clinker
- spinel clinker
- 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
Links
- 229910052596 spinel Inorganic materials 0.000 title claims abstract description 15
- 239000011029 spinel Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 20
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 11
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims description 18
- 238000010304 firing Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 239000007858 starting material Substances 0.000 abstract 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 229910052593 corundum Inorganic materials 0.000 description 7
- 230000005484 gravity Effects 0.000 description 7
- 239000000395 magnesium oxide Substances 0.000 description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011823 monolithic refractory Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマグネシアと配合されてセメントキルン用の煉
瓦の製造に用いられ、また、焼結アルミナと配合されて
製鉄用取鍋の不定形耐火物等の耐火物の原料として使用
されるマグネシア−アルミナスピネルクリンカーの製造
方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is blended with magnesia and used in the production of bricks for cement kilns, and blended with sintered alumina to produce monolithic refractory steel ladle. The present invention relates to a method for producing magnesia-alumina spinel clinker, which is used as a raw material for refractories such as products.
［従来の技術］
スピネルクリンカ−の製造方法としては、１）ＳｉＯｚ
等の低融点鉱物を生ずる焼結助剤を加える方法（特公昭
８０−８９０７）、２）ＭｇＯ原料とＡｌ２Ｏ３原料を
混合した後、軽焼；高圧で成形して焼成する方法（特開
昭５７−６７０７３）、
３）ＭｇＯ原料とＡｌ２Ｏ３原料とを調製して、この原
料を水を含むケークの状態で回転窯で焼成する方法（特
開昭５７−６７０２３）、４）ＭｇＯ原料とＡｌ２Ｏ３
原料を混合して、その混合物を粉砕後、加圧成形して焼
成する方法（特公昭Ｂｌ−１２８７１実施例）が知られ
ている。[Prior art] As a method for manufacturing spinel linker, 1) SiOz
A method of adding a sintering aid that produces low melting point minerals such as (Japanese Patent Publication No. 80-8907), 2) A method of mixing the MgO raw material and Al2O3 raw material, and then light firing; a method of molding and firing at high pressure (Japanese Patent Publication No. 57-1989) -67073), 3) A method of preparing an MgO raw material and an Al2O3 raw material and firing the raw material in a rotary kiln in the state of a cake containing water (JP-A-57-67023), 4) MgO raw material and Al2O3
A method is known in which raw materials are mixed, the mixture is pulverized, then pressure-molded and fired (Example of Japanese Patent Publication No. Sho Bl-12871).
ｌ）の方法は低融物が生成するために熱間の強度と耐ス
ラグ侵食性が劣ることが避けられない。In method 1), low-melting material is produced, so that hot strength and slag erosion resistance are inevitably inferior.
２）の方法では一度高温まで加熱してスピネル反応を進
行させた後、常温まで冷却して高圧で成形して、さらに
高温で焼成するので、品質的には優れているものの、著
しくコスト高となる欠点がある。In method 2), after heating to a high temperature to advance the spinel reaction, the product is cooled to room temperature, molded under high pressure, and then fired at a high temperature.Although the quality is excellent, the cost is extremely high. There is a drawback.
３）の方法は比較的プロセスが簡単なので設備も少くて
許みコスト的に有利である。しかし、品質的には十分蟲
比重の高いクリンカーが得られない欠点がある。Method 3) has a relatively simple process, requires less equipment, and is advantageous in terms of cost. However, in terms of quality, it has the disadvantage that clinker with a sufficiently high clinker density cannot be obtained.
４）の方法は２）と同様に高圧で加圧成形した後、高温
で焼成するので成形設備を必要とし、成形の電力コスト
を必要とすることになる。Method 4), similar to 2), involves pressure molding at high pressure and then firing at high temperature, which requires molding equipment and increases the power cost for molding.
［発明が解決しようとする課題］
本発明は特開昭５７−８９０２３の改良に関し、使用す
る原料をスピネルクリンカ−に適したものとすることで
、安価なコストで、高い品質を持った耐火物原料として
優れたスピネルクリンカ−を提供しようとするものであ
る。[Problems to be Solved by the Invention] The present invention relates to an improvement of JP-A-57-89023, and by making the raw material suitable for spinel clinker, it is possible to produce a refractory with high quality at a low cost. The purpose is to provide a spinel clinker that is excellent as a raw material.
［課題を解決するための手段］
上記課題を解決するための本発明の構成は、アルミナと
水酸化マグネシウムを混合後、焼成してスピネルクリン
カ−を製造する方法において、原料として比表面積が２
．５ｍ２７ｇ以上であり、５μ■以下の粒子が６０重量
％以上であるアルミナと、１０μ■以下の粒子が９０重
量％以上の水酸化マグネシウムを使用するマグネシア−
アルミナスピネルクリンカーの製造方法である。[Means for Solving the Problems] The structure of the present invention for solving the above problems is that in a method of manufacturing spinel clinker by mixing alumina and magnesium hydroxide and then firing the mixture, a raw material having a specific surface area of 2.
．． Magnesia that is 5m27g or more and uses alumina containing 60% by weight or more of particles of 5μ■ or less and magnesium hydroxide containing 90% by weight or more of particles of 10μ■ or less.
This is a method for producing an alumina spinel clinker.
上記アルミナと水酸化マグネシウムの割合は、焼成物換
算でＭｇＯが６０〜２０重二％、Ａｌ２Ｏ３が４０〜８
０重量％の範囲が適当であり、混合するときは、スラリ
ー及び／またはケーク状で混合し、焼成は、成形するこ
となく回転窯に供給して焼成するのが適当である。The ratio of the above alumina and magnesium hydroxide is 60 to 20% MgO and 40 to 8% Al2O3 in terms of fired product.
A range of 0% by weight is appropriate, and when mixing, it is appropriate to mix in the form of a slurry and/or cake, and to bake by supplying the ingredients to a rotary kiln without forming them.
原料アルミナの比表面積が２．５ｍ２／ｇ以上であり、
５μｍ以下の粒子が６０ｆｆｉ ｍ％以上であるアルミ
ナと、水酸化マグネシウムの１０μｍ以下の粒子が９０
ｆ１量％以上の原料を使用することによって８比重が３
．１５以上の工業的に十分使用可能な品質のスピネルク
リンカ−を得ることができる。The specific surface area of the raw material alumina is 2.5 m2/g or more,
Alumina with 60ffi m% or more of particles of 5 μm or less and 90% of magnesium hydroxide particles of 10 μm or less
By using raw materials with f1% or more, the specific gravity of 8 is 3.
．． It is possible to obtain a spinel linker of industrially sufficient quality of 15 or more.
原料アルミナの比表面積が２．５ｗ２７ｇよりも小さい
場合には５μ−以下の粒子の割合がａｏ重ｉｔ％以上で
あっても嵩比重が３．１５を越すことは困難である。比
表面積が２．５ｍ” ７ｇ以上であれば、通常真比重が
低く、しかも嵩高であるために加圧成形が困難であった
、成形体の嵩比重が十分高くならないために結果として
クリンカーの比重が低くなるので、スピネルクリンカ−
や焼結アルミナの原料としては従来使用さ・れていない
。When the specific surface area of raw material alumina is smaller than 2.5w27g, it is difficult for the bulk specific gravity to exceed 3.15 even if the proportion of particles of 5μ or less is ao weight it% or more. If the specific surface area is 2.5 m'' or more than 7 g, the true specific gravity is usually low and the bulk of the compact is bulky, making pressure molding difficult.As the bulk specific gravity of the molded product is not high enough, the specific gravity of the clinker is low. Spinel linker
Conventionally, it has not been used as a raw material for sintered alumina or sintered alumina.
そのようなナルミナの一種である、極低温で焼成された
γ−ＡＩ２０３の高比表面積アルミナでも本発明では十
分使用可能である。A high specific surface area alumina such as γ-AI203 calcined at an extremely low temperature, which is a type of alumina, can also be used in the present invention.
しかし、このように比表面積が２．５ｍ２７ｇ以上であ
っても、５μ以下の粒子の割合が［１０ｆｆｉ ｍ％以
下となると嵩比重が３，１５以上のクリンカーを得るこ
とは困難である。平均粒子径が各々ＩＯμ以下のアルミ
ナ原料及びマグネシア原料を使用することは、特開昭５
７−６７０７３に記載されているが、本発明のプロセス
では粒子径が小さいだけでは十分でなく、その粒子を構
成しているアルミナの比表面積（アルミナ結晶の大きさ
と相関している）が重要である。However, even if the specific surface area is 2.5 m27 g or more, it is difficult to obtain a clinker with a bulk specific gravity of 3.15 or more when the proportion of particles of 5 μm or less is 10 ffim% or less. The use of alumina raw materials and magnesia raw materials each having an average particle size of IOμ or less is disclosed in Japanese Patent Application Laid-open No. 5
7-67073, in the process of the present invention, it is not enough just to have a small particle size, but the specific surface area of the alumina that makes up the particles (which is correlated with the size of the alumina crystals) is important. be.
本発明の比表面積は液体窒素温度でＮ２を吸着させるＢ
ＥＴ法で１１−１定した。又、粒子径はレザー光回折法
で測定した。測定には島原製作所の島原レザー回折式粒
度分布測定装置５ＡＬＤ−１０００を使用した。The specific surface area of the present invention is B, which adsorbs N2 at liquid nitrogen temperature.
It was determined to be 11-1 using the ET method. Further, the particle diameter was measured by laser light diffraction method. For the measurement, Shimabara Laser diffraction type particle size distribution analyzer 5ALD-1000 manufactured by Shimabara Seisakusho was used.
［実施例］ 以下実施例により本発明を具体的に説明する。[Example] The present invention will be specifically explained below using Examples.
実施例１
水酸化マグネシウムの粒子径ｌＯμ以下が９８％でａ度
３５％のスラリーに焼成品ベースで、Ｍ ｇ ０２８．
５％、Ａｌ２Ｏ３が７１．５％となるようにそれぞれ特
性が異なるアルミナを混練して、容器に入れて乾燥し、
そのままガス炉で最高温度１７００℃に１時間保持した
。室温まで冷えた後、焼塊を取出して２．００〜Ｌ３Ｂ
ａ／ｓに破砕して嵩比重を測定した。その結果を表１に
示す。Example 1 A slurry with a particle size of 98% of magnesium hydroxide having a particle size of 10μ or less and a degree of a of 35% was prepared as a fired product based on M g 028.
5% Al2O3 and 71.5% Al2O3, respectively, are kneaded with different properties, placed in a container and dried,
The mixture was kept in a gas furnace at a maximum temperature of 1700° C. for 1 hour. After cooling to room temperature, take out the baked ingot and measure 2.00~L3B.
The bulk specific gravity was measured by crushing at a/s. The results are shown in Table 1.
表 １
表 ２
実施例２
実施例１で使用した水酸化マグネシウムスラリーにそれ
ぞれ特性が異なるアルミナを焼成ベースでＭ ｇ Ｏ２
８，５％及び５０％、Ａ １２０３７１．５％及び５０
％になるように添加して土練機で混練し、高粘度用スラ
リーポンプで回転窯に供給し、最高温度１８００℃で焼
成した。得られたクリンカーの物性を表２に示す。Ｍｇ
Ｏ及びＡｌ２Ｏ３以外の成分は、いずれも０．５％以下
であった。Table 1 Table 2 Example 2 MgO2 was added to the magnesium hydroxide slurry used in Example 1 using alumina with different properties on a calcined basis.
8,5% and 50%, A 120371.5% and 50
% and kneaded with a clay mixer, supplied to a rotary kiln with a high viscosity slurry pump, and fired at a maximum temperature of 1800°C. Table 2 shows the physical properties of the obtained clinker. Mg
All components other than O and Al2O3 were 0.5% or less.
［発明の効果〕
以上説明したように、本発明の方法によれば、比較的簡
単な製造工程で密度の大きいスピネルクリンカ−を製造
することができる。[Effects of the Invention] As explained above, according to the method of the present invention, a spinel clinker with a high density can be manufactured through a relatively simple manufacturing process.
Claims (1)
てスピネルクリンカーを製造する方法において、原料と
して比表面積が２．５ｍ＾２／ｇ以上であり、５μｍ以
下の粒子が６０重量％以上であるアルミナと、１０μｍ
以下の粒子が９０重量％以上の水酸化マグネシウムを使
用することを特徴とするマグネシア−アルミナスピネル
クリンカーの製造方法。(1) In a method of manufacturing spinel clinker by mixing alumina and magnesium hydroxide and then firing, the raw materials have a specific surface area of 2.5 m^2/g or more and particles of 5 μm or less account for 60% by weight or more. Alumina and 10 μm
A method for producing a magnesia-alumina spinel clinker, characterized in that the following particles contain 90% by weight or more of magnesium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63239756A JPH0288420A (en) | 1988-09-27 | 1988-09-27 | Production of spinel clinker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63239756A JPH0288420A (en) | 1988-09-27 | 1988-09-27 | Production of spinel clinker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0288420A true JPH0288420A (en) | 1990-03-28 |
Family
ID=17049458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63239756A Pending JPH0288420A (en) | 1988-09-27 | 1988-09-27 | Production of spinel clinker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0288420A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745064A (en) * | 1994-10-25 | 1998-04-28 | Matsushita Electric Industrial Co., Ltd. | D/A conversion device having multiple D/A converters with substantially equal voltages supplied thereto |
| JP2008243706A (en) * | 2007-03-28 | 2008-10-09 | Ube Material Industries Ltd | Aluminum content magnesium oxide calcination object powder |
| JP2010138050A (en) * | 2008-12-15 | 2010-06-24 | Ngk Insulators Ltd | Method of manufacturing compound oxide |
-
1988
- 1988-09-27 JP JP63239756A patent/JPH0288420A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745064A (en) * | 1994-10-25 | 1998-04-28 | Matsushita Electric Industrial Co., Ltd. | D/A conversion device having multiple D/A converters with substantially equal voltages supplied thereto |
| JP2008243706A (en) * | 2007-03-28 | 2008-10-09 | Ube Material Industries Ltd | Aluminum content magnesium oxide calcination object powder |
| JP2010138050A (en) * | 2008-12-15 | 2010-06-24 | Ngk Insulators Ltd | Method of manufacturing compound oxide |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100402470C (en) | Thermal-knock resisting diamond spar-spinele refractory materials and its production | |
| US4152166A (en) | Zircon-containing compositions and ceramic bodies formed from such compositions | |
| CN104692820B (en) | What a kind of high temperature was fine and close does not burns composite brick and moulding process thereof | |
| Zawrah et al. | Synthesis and characterization of calcium aluminate nanoceramics for new applications | |
| Khattab et al. | Alumina–zircon refractory materials for lining of the basin of glass furnaces: effect of processing technique and TiO2 addition | |
| CN108439961A (en) | A kind of preparation method of the high-purity calcium hexaluminate of densification-corundum composite diphase material | |
| US4117055A (en) | Low mass, high alumina-silica refractories | |
| CN106396699B (en) | A kind of aluminum-resistant liquid penetration pouring material and preparation method thereof adding ZrN-SiAlON | |
| JPH0288420A (en) | Production of spinel clinker | |
| JP2005154180A (en) | Alumina cement composition and monolithic refractory | |
| CN100429177C (en) | Mg-Al light thermal-insulated fireproof materials and method for preparing same | |
| CN101643354A (en) | Production method of lithium non-expansion heat-resistant ceramic | |
| US2434451A (en) | Refractories | |
| RU2140407C1 (en) | Refractory concrete mix | |
| CN107311674B (en) | Special sprue pipe for casting and preparation method thereof | |
| JPH04198058A (en) | Magnesia clinker and production thereof | |
| US2744021A (en) | Process of making refractory brick and brick | |
| US3765914A (en) | Siliceous bonded refractory | |
| JPS6112871B2 (en) | ||
| EP0501662A2 (en) | Manufacture of shaped articles from refractory powders | |
| JP2568825B2 (en) | Zirconia-containing magnesia clinker and method for producing the same | |
| JP4588239B2 (en) | Alumina cement, alumina cement composition, and amorphous refractory using the same | |
| RU2033987C1 (en) | Charge for preparing of porous ceramic material | |
| JPH09301766A (en) | Porous spinel clinker and its production | |
| RU1794072C (en) | Charge for refractory materials preparation |