JPH0653628B2 - Method for manufacturing porous ceramic compact - Google Patents
Method for manufacturing porous ceramic compactInfo
- Publication number
- JPH0653628B2 JPH0653628B2 JP2282724A JP28272490A JPH0653628B2 JP H0653628 B2 JPH0653628 B2 JP H0653628B2 JP 2282724 A JP2282724 A JP 2282724A JP 28272490 A JP28272490 A JP 28272490A JP H0653628 B2 JPH0653628 B2 JP H0653628B2
- Authority
- JP
- Japan
- Prior art keywords
- flux
- molded body
- ceramic
- ceramic molded
- ceramic particles
- 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.)
- Expired - Lifetime
Links
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
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。TECHNICAL FIELD The present invention relates to a method for producing various porous ceramic molded bodies such as a diffuser plate, a sound absorbing plate, a water-permeable pavement plate, and a filter.
(従来の技術) 上記のような各種の多孔質のセラミックの成形体を製造
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 types of porous ceramic compacts as described above, the ceramic particles are kneaded together with the ceramic compact flux and the organic pressure-sensitive adhesive, and then molded.
The method of baking at ~ 1400 ° C is adopted. By the way, as a method for producing such a flux for a ceramic molded body, a wet crushing method and a dry crushing method shown in FIG. 3 are known.
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1mm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。In the wet pulverization method, the flux materials are wet mixed and pulverized by a ball mill or a tron mill, dehydrated as a cake by a filter press, and then dried by hot air or natural drying until the water content becomes 3% or less, and the cake is roughly pulverized and This is a method of finely pulverizing to a particle size of 1 mm or less. The dry crushing method is a method of crushing glass or frit by a dry method.
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
せにくい問題もあった。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 until the raw material is made into powder, and when finely pulverized, the amount of dust generated is large because the water content is small and the particle size is fine, and there is a problem in the working environment. Furthermore, since the flux for a ceramic molded body obtained by this method has an irregular shape and poor fluidity, it is not easy to put it in a mixer with ceramic particles when manufacturing a ceramic molded body, There is also a problem that it is difficult to uniformly disperse. In particular, when the ceramic particles are unfired granulated particles, there is a problem that the shape of the granulated ceramic particles tends to collapse during mixing with the flux because of 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, in the dry pulverization method, a large amount of dust is generated at the time of pulverization and at the time of taking it out from a ball mill or the like after pulverization, which causes a problem in working environment.
(発明が解決しようとする課題) 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かつ効率良く製造し、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。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and produces a flux for a ceramic molded body having good fluidity quickly and efficiently without generating much dust, The present invention has been completed in order to provide a method for producing a porous ceramic molded body, which can produce a homogeneous porous ceramic molded body without breaking the shape of ceramic grains by using such a ceramic molded body flux. is there.
(課題を解決するための手段) 上記の問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
ほぼ完全な球形の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 has been made to achieve the above-mentioned problems, includes a ceramic particle, a flux for a substantially perfect spherical ceramic molded body which is spray-dried by a spray drier, and an organic adhesive. The gist is a method for producing a porous ceramic molded body, which comprises kneading with an agent, molding and firing.
本発明においては、例えば重量%でSiO250〜75%、Al2O
35〜25%、Fe2O30〜20%、TiO20〜5%、MgO2〜8
%、CaO0〜4%、K2O+Na2O2〜7%、ZrO20〜5%、
MnO20〜3%、CoO0〜2%、Cr2O30〜10%の化学組成
よりなるフラックス原料が使用される。In the present invention, for example, SiO 2 50 to 75% by weight, Al 2 O
3 5~25%, Fe 2 O 3 0~20%, TiO 2 0~5%, MgO2~8
%, CaO 0 to 4%, K 2 O + Na 2 O 2 to 7%, ZrO 2 0 to 5%,
A flux raw material having a chemical composition of 0 to 3% MnO 2, 0 to 2 % CoO, and 0 to 10% Cr 2 O 3 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。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
の向上等に有益である。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60〜100μm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剤によって行うことが
できる。As described above, in the present invention, the flux raw material that has been wet-mixed and pulverized is directly made into a powder state from a slurry state by a spray dryer, so that it is possible to omit the conventional steps of dehydration, drying, and pulverization by a filter press. It is possible to shorten the process, reduce labor, and reduce the work space. Further, if the flux is manufactured by a spray dryer, the amount of dust generated can be drastically reduced because there is no conventional pulverization step in a dry state, which is useful for improving the working environment. Furthermore, if the slurry viscosity is adjusted to 300 cp or less, and spray-dried with a spray dryer to granulate, it is possible to obtain an almost perfect spherical flux for a ceramic molded body with a particle size of about 60-100 μm, which is produced by the conventional method. The fluidity is better than that of the ceramic molded body flux. The slurry viscosity can be adjusted with a peptizer such as water glass, if necessary.
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、
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。As described above, if the slurry viscosity is adjusted to 300 cp or less and spray-dried with a spray dryer to granulate,
Since it is possible to obtain an almost perfect spherical flux for a ceramic molded body, this flux for a ceramic molded body is kneaded together with ceramic particles and an organic pressure-sensitive adhesive, and molded,
By firing, the flux and the ceramic particles can be easily mixed, the flux can be uniformly dispersed in the ceramic particles, and a porous ceramic molded body with stable characteristics can be manufactured.
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。Further, in the mixing step, even if the ceramic particles are unfired ceramic particles and the green strength is weak,
By using the above-mentioned spherical ceramic molded body flux, the flux can be uniformly dispersed in the granulated ceramic particles even under mild mixing conditions, so that the shape of the granulated ceramic particles is not deformed and deformed. It can prevent collapse. In addition, by using ceramic particles that have an oily coating such as petroleum on the surface of the raw granulated ceramic particles, water evaporation from the ceramic particles can be prevented, slippage is improved, and uniform mixing of the flux is better. Desirable for ease. Further, when the particle size of the flux for a ceramic molded body is equal to or smaller than the particle size of the granulated ceramic particles, the flux is easily mixed uniformly in the granulated ceramic particles, and the pore distribution is uniform and the porous material has high strength. It is desirable because a ceramic molded body can be obtained.
次に本発明の実施例を示す。Next, examples of the present invention will be described.
(実施例) 重量%で、SiO265%、Al2O319%、Fe2O35%、TiO21
%、MgO4%、CaO2%、K2O2%、Na2O2%の化学組成
に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5μm以下とした。(Example) By weight%, SiO 2 65%, Al 2 O 3 19%, Fe 2 O 3 5%, TiO 2 1
%, MgO 4%, CaO 2 %, K 2 O 2%, Na 2 O 2%, the flux raw material was wet mixed and crushed with a ball mill at a water content of 40% to an average particle size of 5 μm or less.
次にこのウ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、アトマイザー回転数、スラリー供給
量を調節しつつスプレードライヤーにて噴霧乾燥し、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。以上の工程を第1図に示す。Next, this Uraley was adjusted to a slurry viscosity of about 150 cp and spray-dried with a spray dryer while adjusting the atomizer rotation speed and slurry supply amount, and granulated to a particle size of 250 μm and a water content of 4% or less. To obtain a ceramic molded body flux. The above steps are shown in FIG.
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。This flux for ceramic molded body is almost completely spherical and has good fluidity, and as shown in FIG. 2, it was kneaded with ceramic particles and an organic adhesive, molded and fired to produce a porous ceramic molded body. In addition, it was possible to obtain a porous ceramic compact which was capable of uniformly dispersing the flux and had stable properties such as strength and pore distribution.
(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
ヤーにより直接ほ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。(Effect of the Invention) As described above, according to the present invention, the flux raw material that has been wet-mixed and pulverized is directly made into a substantially spherical powder state from a slurry state by a spray dryer, so that a ceramic molded body having good fluidity is obtained. The flux for use can be produced quickly and efficiently without generating dust. Further, since the present invention uses the above-mentioned flux for a ceramic molded body having good fluidity, the flux and the ceramic particles can be easily mixed, the flux can be uniformly dispersed in the ceramic particles, and a porous material having stable characteristics can be obtained. It is possible to manufacture a high quality ceramic molded body. Furthermore, even if the granulated ceramic particles are raw ceramic particles, according to the manufacturing method of the present invention, the raw ceramic particles are uniformly dispersed in the ceramic particles without being destroyed in the mixing step with the flux. Therefore, it is possible to manufacture a porous ceramic compact having 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 by the present invention is preferable as a diffuser plate that requires uniform foaming, a filter related to metal and biotechnology, a pavement material for roads, a sound absorbing plate, and the like.
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 is extremely large as a method for producing a porous ceramic molded body that eliminates the conventional problems and greatly contributes to industrial development.
第1図は第1の発明の工程を説明するブロック図、第2
図は第2の発明の工程を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 for explaining the steps of the first invention, and FIG.
FIG. 3 is a block diagram for explaining the steps of the second invention, and FIG. 3 is a block diagram for explaining the conventional steps.
Claims (1)
霧乾燥して造粒したほぼ完全な球形のセラミック成形体
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。1. A porous ceramic characterized by kneading, molding and firing a ceramic particle, an almost complete spherical flux for a ceramic molded body, which is granulated by spray drying with a spray dryer, and an organic adhesive. Molded body manufacturing method.
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 JPH04160077A (en) | 1992-06-03 |
| JPH0653628B2 true 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) |
Families Citing this family (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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820898B2 (en) * | 1980-07-04 | 1983-04-26 | 工業技術院長 | Manufacturing method for fired lightweight building materials |
| JPS62171972A (en) * | 1986-01-25 | 1987-07-28 | 不二見セラミック株式会社 | Water permeable floor material |
| JPH0641393B2 (en) * | 1988-09-27 | 1994-06-01 | 日本碍子株式会社 | Porous ceramic plate, water-permeable pavement plate and sound absorbing plate |
-
1990
- 1990-10-20 JP JP2282724A patent/JPH0653628B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04160077A (en) | 1992-06-03 |
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