JPH04160077A - Production of porous ceramic molded body - Google Patents
Production of porous ceramic molded bodyInfo
- Publication number
- JPH04160077A JPH04160077A JP28272490A JP28272490A JPH04160077A JP H04160077 A JPH04160077 A JP H04160077A JP 28272490 A JP28272490 A JP 28272490A JP 28272490 A JP28272490 A JP 28272490A JP H04160077 A JPH04160077 A JP H04160077A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- ceramic
- ceramic molded
- molded body
- porous ceramic
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000004907 flux Effects 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 238000001694 spray drying Methods 0.000 claims abstract description 5
- 238000010304 firing Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000004898 kneading Methods 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 abstract description 24
- 239000000428 dust Substances 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000005469 granulation Methods 0.000 abstract description 2
- 230000003179 granulation Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 238000010298 pulverizing process Methods 0.000 description 13
- 239000002002 slurry Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XQVKLMRIZCRVPO-UHFFFAOYSA-N 4-[(2-arsonophenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonic acid Chemical compound C12=CC=C(S(O)(=O)=O)C=C2C=C(S(O)(=O)=O)C(O)=C1N=NC1=CC=CC=C1[As](O)(O)=O XQVKLMRIZCRVPO-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000679125 Thoron Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は散気板、吸音板、透水性舗装板、フィルター等
の各種の多孔質セラミック成形体の製造法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing various porous ceramic molded bodies such as air diffusers, sound absorbing plates, water-permeable pavement plates, and filters.
（従来の技術）
上記のような各種の多孔質のセラミック成形体を製造す
るには、セラミック粒をセラミック成形体用フラックス
及び有機粘着剤とともに混練し、成形したうえ、８００
〜１４００℃で焼成する方法が取られている。ところで
このようなセラミック成形体用フラックスの製造法とし
ては、第３図に示す湿式粉砕法と乾式粉砕法とが知られ
ている。(Prior art) In order to produce various porous ceramic molded bodies as described above, ceramic grains are kneaded with a flux for ceramic molded bodies and an organic adhesive, molded, and then
A method of firing at a temperature of ~1400°C has been adopted. By the way, as methods for producing such flux for ceramic molded bodies, there are known a wet pulverization method and a dry pulverization method as shown in FIG.
湿式粉砕法はフラックス原料をボールミルまたはトロン
ミルにて湿式混合粉砕し、フィルタープレスにてケーキ
状として脱水した後、水分が３％以下になるまで熱風乾
燥あるいは自然乾燥を行い、そのケーキを粗粉砕及び微
粉砕して粒径１■以下の粒度とする方法である。また乾
式粉砕法は、ガラスまたはフリットを乾式で粉砕する方
法である。The wet pulverization method wet-mixes and pulverizes the flux raw materials in a ball mill or thoron mill, dehydrates them into a cake shape in a filter press, and then performs hot air drying or natural drying until the moisture content is 3% or less, and then coarsely pulverizes and pulverizes the cake. This is a method of finely pulverizing the particles to a particle size of 1 square centimeter or less. The dry pulverization method is a method of dry pulverizing glass or frit.
しかし湿式粉砕法は原料が粉末となるまでの工程が多い
ために時間も長くかかり、また微粉砕時には水分が少な
く粒度も細かいので粉塵発生量が多く、作業環境上の問
題もあった。更にこの方法により得られたセラミック成
形体用フラックスは不規則な形状であって流動性が悪い
ために、セラミック成形体を製造する際にセラミック粒
等との混合機への投入が容易ではなく、また均一分散さ
せにくい間罷もあった。特にセラミック粒が造粒された
未焼成粒である場合、強度が弱いためフラックスとの混
合の際に造粒されたセラミック粒の形状がくずれ易いと
の問題もあった。However, the wet pulverization method takes a long time because there are many steps to turn the raw material into powder, and since there is little moisture during pulverization and the particle size is fine, a large amount of dust is generated, which poses problems in the working environment. Furthermore, the flux for ceramic molded bodies obtained by this method has an irregular shape and poor fluidity, so it is not easy to feed it into a mixer with ceramic grains etc. when manufacturing ceramic molded bodies. Additionally, there were some gaps that made uniform dispersion difficult. In particular, when the ceramic particles are granulated unfired particles, there is a problem that the shape of the granulated ceramic particles is easily distorted when mixed with flux because of their weak strength.
一方、乾式粉砕法は粉砕時や粉砕後にボールミル等から
取り出す際に多量の粉塵が発生し、作業環境上の問題を
生じていた。On the other hand, the dry pulverization method generates a large amount of dust during pulverization and when taking it out from a ball mill etc. after pulverization, causing problems in the working environment.
（発明が解決しようとするＩＩ！Ｉ）
本発明は上記した従来の問題点を解消して、流動性の良
好なセラミック成形体用フラックスを、多くの粉塵を発
生させることなく迅速がっ効率良く製造し、このような
セラミック成形体用フラックスを用いてセラミック粒の
形状を崩すことなく均質な多孔質セラミック成形体を製
造することができる多孔質セラミック成形体の製造法を
提供するために完成されたものである。(II!I to be solved by the invention) The present invention solves the above-mentioned conventional problems and can quickly and efficiently produce a flux for ceramic molded bodies with good fluidity without generating much dust. The present invention was completed in order to provide a method for manufacturing a porous ceramic molded body, which can produce a homogeneous porous ceramic molded body without destroying the shape of the ceramic grains using such a flux for ceramic molded bodies. It is something that
（課題を解決するための手段）
上記の課題を達成するためになされた本発明は、セラミ
ック粒とスプレードライヤーにて噴霧乾燥して造粒した
セラミック成形体用フラックスと有機粘着剤とを混練し
、成形、焼成することを特徴とする多孔質セラミック成
形体の製造法を要旨とするものである。(Means for Solving the Problems) The present invention, which was made to achieve the above-mentioned problems, kneads ceramic particles, a flux for ceramic molded bodies, which is granulated by spray drying with a spray dryer, and an organic adhesive. The gist of the present invention is a method for producing a porous ceramic molded body, which is characterized by the steps of: , molding, and firing.
本発明においては、例えば重量％でＳｉＯ□５０〜７５
％、Ａｌｔｏｚ ５ 〜２５％、Ｆｅｒｎｓ Ｏ〜
２ｏ％、Ｔｉｅｒ ０〜５％、−８０２〜８％、Ｃａ０
Ｏ〜４ ％、に、０ ＋Ｎａ＊ｏ２〜７ ％、Ｚｒ０１
Ｏ〜 ５％、Ｍｎ０ｔ Ｏ〜 ３％、Ｃｏ。In the present invention, for example, SiO□50 to 75% by weight
%, Altoz 5~25%, Ferns O~
2o%, Tier 0-5%, -802-8%, Ca0
O~4%, 0+Na*O2~7%, Zr01
O~5%, Mn0t O~3%, Co.
０〜２％、ＣｒＪ３０〜ｌＯ％の化学組成よりなるフラ
ックス原料が使用される。A flux raw material having a chemical composition of 0 to 2% CrJ and 30 to 1O% is used.
上記のように、本発明では湿式混合粉砕したフラックス
原料をスラリーの状態からスプレードライヤーにより直
接粉末の状態とするので、従来のようなフィルタープレ
スによる脱水、乾燥、粉砕の工程を省略することができ
、工程の短縮化、労力の低減、作業場スペースの縮小が
可能である。As described above, in the present invention, the wet mixed and pulverized flux raw material is directly converted from a slurry state into a powder state using a spray dryer, so the conventional steps of dehydration, drying, and pulverization using a filter press can be omitted. , it is possible to shorten the process, reduce labor, and reduce work space.
またフラックスをスプレードライヤーで製造すれば、従
来のような乾燥状態における粉砕工程がないので粉塵発
生量を激減させることができ、作業環境の向上環に有益
である。更にスラリー粘性を３００ｃｐ以下に調整した
うえスプレードライヤーにより噴霧乾燥して造粒すれば
、粒度が６０〜１０００μ−程度のほぼ完全な球状のセ
ラミック成形体用フラックスを得ることができ、従来法
により製造されたセラミック成形体用フラックスに比較
して流動性がよくなる。なお、スラリー粘性の調整は必
要に応じて水ガラス等の解膠側によって行うことができ
る。 ′
上記のように、スラリー粘性を３００ｃｐ以下に調整し
たうえスプレードライヤーにより噴霧乾燥して造粒すれ
ば、はぼ完全な球状のセラミック成形体用フラックスを
得ることができるので、このセラミック成形体用フラッ
クスをセラミック粒及び有機粘着剤とともに混練し、成
形、焼成すれば、フラックスとセラミック粒との混合が
容易でフラックスをセラミック粒中に均一に分散させる
ことができ、特性の安定した多孔質のセラミック成形体
を製造することが可能となる。Furthermore, if the flux is manufactured using a spray dryer, there is no pulverization process in a dry state as in the conventional method, so the amount of dust generated can be drastically reduced, which is beneficial for improving the working environment. Furthermore, by adjusting the slurry viscosity to 300 cp or less and granulating it by spray drying with a spray dryer, it is possible to obtain an almost perfectly spherical flux for ceramic molded bodies with a particle size of about 60 to 1000 μ-. It has better fluidity than the flux for ceramic molded bodies. Note that the slurry viscosity can be adjusted by using a peptizing agent such as water glass, if necessary. ' As mentioned above, if the slurry viscosity is adjusted to 300 cp or less and then granulated by spray drying with a spray dryer, it is possible to obtain a flux for use in ceramic molded bodies that is almost perfectly spherical. If flux is kneaded with ceramic particles and an organic adhesive, then molded and fired, it is easy to mix the flux and ceramic particles, and the flux can be uniformly dispersed in the ceramic particles, creating a porous ceramic with stable properties. It becomes possible to manufacture a molded body.
また上記混合工程において、上記セラミック粒が未焼成
のセラミック粒であって生強度が弱い場合であっても、
上記した球状のセラミック成形体用フラックスを使用す
ることにより、おだやかな混合条件でも造粒されたセラ
ミック粒中にフラックスを均一に分散させることができ
るため、造粒されたセラミック粒の形状の変形およびく
ずれを防止できる。また石油類等の油状の被膜を生の造
粒されたセラミック粒の表面に施したセラミック粒を使
用すれば、セラミック粒からの水分蒸発も防止でき、更
にすべりがよくなりフラックスの均一混合がより容易と
なるために望ましい、またセラミック成形体用フラック
スの粒度が造粒されたセラミック粒の粒度以下である場
合は、造粒されたセラミック粒中に該フラックスが均一
に混合され易く、孔分布が均一で高強度の多孔質セラミ
ック成形体が得られるため望ましい。In addition, in the mixing step, even if the ceramic grains are unfired ceramic grains and have low green strength,
By using the above-mentioned flux for spherical ceramic molded bodies, it is possible to uniformly disperse the flux in the granulated ceramic particles even under mild mixing conditions, so that the shape of the granulated ceramic particles can be prevented from deforming. Can prevent collapse. Additionally, if you use ceramic grains that have an oily coating made of petroleum or other oil applied to the surface of the raw granulated ceramic grains, you can prevent water evaporation from the ceramic grains, and it will also improve slippage and allow for more uniform mixing of the flux. If the particle size of the flux for the ceramic molded body is equal to or smaller than the particle size of the granulated ceramic particles, the flux will be easily mixed uniformly into the granulated ceramic particles, and the pore distribution will be improved. This is desirable because a porous ceramic molded body with uniformity and high strength can be obtained.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
（実施例）
重量％で、ＳｉＯｘ ６５％、Ａｌｔｏｚ １９％、Ｐ
ｅｇ’ｓ ５％、Ｔｉ０ｚ １％、？Ｉｇｏ ４％、
Ｃａ０２％、ｘｚｏ ２％、Ｎａｘ０２％の化学組成よ
りなるフラックス原料を水分４０％にてボールミルによ
り湿式混合粉砕し、平均粒度を５ｐ■以下とした。(Example) In weight %, SiOx 65%, Altoz 19%, P
eg's 5%, Ti0z 1%,? Igo 4%,
A flux raw material having a chemical composition of 02% Ca, 2% xzo, and 02% Nax was wet mixed and ground in a ball mill at a moisture content of 40% to have an average particle size of 5p or less.
次にこのスラリーをスラリー粘性が１５０ｃｐ程度とな
るように調整した゛うえ、アトマイザ−回転数、スラリ
ー供給量を調節しつつスプレードライヤ−にて噴霧乾燥
し、粒度が２５０μｍ、水分が４％以下に造粒してセラ
ミック成形体用フラックスを得た０以上の工程を第１図
に示す。 ゛このセラミック成形体用フラック
スはほぼ完全な球形で流動性が良好であり、第２図に示
すようにセラミック粒および有機粘着剤とともに混練し
、成形、焼成して多孔質セラミック成形体を製造したと
ころ、フラックスの均一分散が可能であり、強度、気孔
分布等の特性が安定した多孔質セラミック成形体を得る
ことができた。Next, this slurry was adjusted so that the slurry viscosity was about 150 cp, and then spray-dried in a spray dryer while adjusting the atomizer rotation speed and slurry supply amount, so that the particle size was 250 μm and the moisture content was 4% or less. FIG. 1 shows zero or more steps in which a flux for ceramic molded bodies was obtained by granulation. ``This flux for ceramic molded bodies has an almost perfect spherical shape and good fluidity, and as shown in Figure 2, it was kneaded with ceramic particles and an organic adhesive, molded, and fired to produce a porous ceramic molded body. However, it was possible to obtain a porous ceramic molded body in which uniform dispersion of flux was possible and properties such as strength and pore distribution were stable.
（発明の効果）
以上に説明したように、本発明によれば湿式混合粉砕し
たフラックス原料をスラリーの状態からスプレードライ
ヤーにより直接はぼ球状の粉末の状態とするので、流動
性の良好なセラミック成形体用フラックスを、粉塵を発
生させることなく、迅速かつ効率良く製造することがで
きる。また本発明は上記の流動性の良好なセラミック成
形体用フラックスを使用するので、フラックスとセラミ
ック粒との混合が容易でフラックスをセラミック粒中に
均一に分散させることができ、特性の安定した多孔質セ
ラミック成形体を製造することができる。更にまた、上
記造粒されたセラミック粒が生のセラミック粒であって
も、本発明の製造法によれば生のセラミック粒がフラッ
クスとの混合工程でくずれることなくセラミック粒中に
均一に分散されるため、孔径分布の安定した多孔質セラ
ミック成形体を製造することができる。(Effects of the Invention) As explained above, according to the present invention, the wet mixed and pulverized flux raw material is directly converted from a slurry state into a spherical powder state using a spray dryer, so that ceramic molding with good fluidity can be achieved. To quickly and efficiently produce body flux without generating dust. In addition, since the present invention uses the above-mentioned flux for ceramic molded bodies with good fluidity, it is easy to mix the flux and the ceramic particles, and the flux can be uniformly dispersed in the ceramic particles. A high quality ceramic molded body can be produced. Furthermore, even if the granulated ceramic grains are raw ceramic grains, according to the manufacturing method of the present invention, the raw ceramic grains are uniformly dispersed in the ceramic grains without being broken during the mixing process with flux. Therefore, it is possible to produce a porous ceramic molded body with a stable pore size distribution.
なお本発明により製造された多孔質セラミック成形体は
、均一な発泡が要求される散気板、金属およびバイオテ
クノロジー関係のフィルター、道路用の舗装材、吸音板
等として好ましいものである。The porous ceramic molded body produced according to the present invention is suitable for use in air diffuser plates, metal and biotechnology related filters, road paving materials, sound absorbing plates, etc., which require uniform foaming.
よって本発明は従来の問題点を一掃した多孔質セラミッ
ク成形体の製造法として、産業の発展に寄与するところ
はきわめて大きいものである。Therefore, the present invention greatly contributes to the development of industry as a method for producing porous ceramic molded bodies that eliminates the problems of the conventional methods.
第１図は第１の発明の詳細な説明するブロック図、第２
図は第２の発明の詳細な説明するブロック図、第３図は
従来の工程を説明するブロック図である。FIG. 1 is a block diagram explaining the first invention in detail;
The figure is a block diagram explaining the second invention in detail, and FIG. 3 is a block diagram explaining the conventional process.
Claims (1)
粒したセラミック成形体用フラックスと有機粘着剤とを
混練し、成形、焼成することを特徴とする多孔質セラミ
ック成形体の製造法。A method for producing a porous ceramic molded body, which comprises kneading ceramic grains, a flux for a ceramic molded body granulated by spray drying with a spray dryer, and an organic adhesive, followed by molding and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282724A JPH0653628B2 (en) | 1990-10-20 | 1990-10-20 | Method for manufacturing porous ceramic compact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282724A JPH0653628B2 (en) | 1990-10-20 | 1990-10-20 | Method for manufacturing porous ceramic compact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04160077A true JPH04160077A (en) | 1992-06-03 |
| JPH0653628B2 JPH0653628B2 (en) | 1994-07-20 |
Family
ID=17656220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2282724A Expired - Lifetime JPH0653628B2 (en) | 1990-10-20 | 1990-10-20 | Method for manufacturing porous ceramic compact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653628B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458471B1 (en) * | 2002-07-05 | 2004-11-26 | 대주엔지니어링(주) | Manufacturing method of the ceramics filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717459A (en) * | 1980-07-04 | 1982-01-29 | Kogyo Gijutsuin | Manufacture of bakes lightweight construction material |
| JPS62171972A (en) * | 1986-01-25 | 1987-07-28 | 不二見セラミック株式会社 | Water permeable floor material |
| JPH0292878A (en) * | 1988-09-27 | 1990-04-03 | Ngk Insulators Ltd | Ceramic porous board, water permeable pavement board and acoustical board |
-
1990
- 1990-10-20 JP JP2282724A patent/JPH0653628B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717459A (en) * | 1980-07-04 | 1982-01-29 | Kogyo Gijutsuin | Manufacture of bakes lightweight construction material |
| JPS62171972A (en) * | 1986-01-25 | 1987-07-28 | 不二見セラミック株式会社 | Water permeable floor material |
| JPH0292878A (en) * | 1988-09-27 | 1990-04-03 | Ngk Insulators Ltd | Ceramic porous board, water permeable pavement board and acoustical board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458471B1 (en) * | 2002-07-05 | 2004-11-26 | 대주엔지니어링(주) | Manufacturing method of the ceramics filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0653628B2 (en) | 1994-07-20 |
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