JPS60231455A - Refractoriness degree preparation of extrusion molding ceramic raw material - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 利用分野 本発明は、湿式押出成形用陶磁器質製品原料（以下にセ
ラミック原料と略称する）の耐火度調整方法に関するっ
詳しくは、該セラミック原料の原料粘土分と原料行動と
の比率を特定の範囲内に維持しセして該面分の少くも一
つケ％足の粒度範囲内に粗粉砕することからなる、該調
整方法に関するっ本発明の調整方法は、湿式押出成形し
そして焼成するタイル等の陶磁器質製品に有利に適用さ
れる。Detailed Description of the Invention Field of Application The present invention relates to a method for adjusting the fire resistance of a ceramic product raw material for wet extrusion molding (hereinafter abbreviated as ceramic raw material). The preparation method of the present invention comprises the steps of maintaining the ratio of the particles within a specific range and coarsely pulverizing the particles to within a particle size range of at least one percent of the area. It is advantageously applied to extruded and fired ceramic products such as tiles.

湿式押出成形では、押出成形時の成形性を保持するため
粘土分と面分から成る坏土に適当な可塑性が必要である
１、ここに、面分とは長石、陶石、ろう石等を一般に意
味する。坏土中の粘土分の比率が高くなると可塑性が強
くなって成形しにくくな９、逆に坏土中の面分の比率が
高くなると可塑性が弱くなって押出成形の形を保持する
ことができなくなり、いずれも不都合でおる。このよう
に湿式押出成形法では、（粘土分）／（面分）の比率に
制約がある。微粒を多く含む高級粘土を使用した場合、
この比率は約５０１５０〜約４０７６０の範囲にある。In wet extrusion molding, in order to maintain formability during extrusion molding, it is necessary for the clay consisting of clay and surface components to have appropriate plasticity1. means. As the proportion of clay in the clay increases, the plasticity becomes stronger and it becomes difficult to mold.9 Conversely, as the proportion of surface in the clay increases, the plasticity weakens and the shape of the extrusion molding cannot be maintained. Both of them are inconvenient. In this way, in the wet extrusion molding method, there are restrictions on the ratio of (clay content)/(area content). When using high-grade clay containing many fine particles,
This ratio ranges from about 50,150 to about 40,760.

原料事情（ある原料銘柄の枯渇等）によって、使用原料
のうち一つを同−原料内で現行と異なる銘柄に換える必
要が生じる場合がある。例えば、原料である陶石の産地
すなわち銘柄を、アルカリ分の少ない現行の陶石（以下
に陶石Ａと記す）からアルカリ分の多い別な銘柄の陶石
（以下に陶石Ｂと記す）に換えた場合、アルカリ分が増
加するので坏土の耐火度は低くなる。従って、該陶石Ｂ
と残りの原料（例えば長石と粘土）との調合比率を変え
る必要があった。すなわち、化学組成的な耐火度（すな
わちアルカリ含有量）が大きく異なる銘柄の原料と換え
る場合に（陶石Ａから陶石Ｂへの置換によシ）耐火度は
低くなるので、置換前の耐火度に引上げる必要が生じ、
そのため粘土分を多くし面分を減らすことになるつこう
した場合、前記した（粘土）／（面分）の比率が例えば
５５／４５となシ、その適正範囲（約５０１５０〜約４
０７６０）を越える。この適正範囲を越えないためには
、耐火度の高い長石や粘土の銘柄を探し出して、原料の
銘柄変更をしなければならなかった。Depending on the raw material situation (depletion of a certain raw material brand, etc.), it may be necessary to replace one of the raw materials used with a different brand from the current one within the same raw material. For example, the origin or brand of the pottery stone used as a raw material can be changed from a current pottery stone with a low alkali content (hereinafter referred to as pottery stone A) to a different brand of pottery stone with a high alkali content (hereinafter referred to as pottery stone B). If the clay is changed to , the alkali content increases and the fire resistance of the clay decreases. Therefore, the pottery stone B
It was necessary to change the mixing ratio of the remaining raw materials (e.g. feldspar and clay). In other words, when replacing the raw material with a brand of material that has a significantly different chemical compositional fire resistance (i.e., alkali content) (replacement of pottery stone A with pottery stone B), the fire resistance will be lower, so the fire resistance before the replacement will be lower. It became necessary to raise the
Therefore, when increasing the clay content and decreasing the surface area, the ratio of (clay)/(surface area) described above should be, for example, 55/45, and its appropriate range (approximately 50,150 to approximately 4
0760). In order to avoid exceeding this appropriate range, it was necessary to find a brand of feldspar or clay with high fire resistance and change the brand of raw material.

このように、−原料の銘柄を変更すると、それに伴なっ
て他の原料との調合比率を変える必要、ならびに他の原
料の銘柄をも変更する必要が生じ、多大な手数を要した
。In this way, when the brand of raw materials is changed, it becomes necessary to change the mixing ratio with other raw materials and also to change the brands of other raw materials, which requires a great deal of effort.

従来技術によれば、上記の石分原料である長石や陶石は
、側層性の安定を考慮して充分時間をかけて微細磨して
いた。この様に微細磨されているので、該面分の粒度は
銘柄に関係なく一定となる。According to the prior art, the feldspar and pottery stone, which are the above-mentioned stone raw materials, are finely polished for a sufficient amount of time in consideration of the stability of the lateral stratification. Since it is finely polished in this way, the grain size of the surface is constant regardless of the brand.

そのため長石や陶石の耐火度は、その化学・鉱物組成に
のみによって一方的に決まっていた。そのため長石や陶
石の原料銘柄が変わること、すなわち化学・鉱物組成が
変わることは、耐火度が大きく変わる結果となシ上記の
繁雑な問題点を生起した。なお、以上の欠点の他に、微
細磨した長石や陶石と粘土で調整された成形体は、嵩密
度が低いため収縮率が太きくそして完成された製品の品
質に変形、寸法のバラツキ等の欠点を生じていた。Therefore, the refractory properties of feldspar and pottery stone were determined solely by their chemical and mineral composition. Therefore, a change in the raw material brand of feldspar or pottery stone, that is, a change in chemical and mineral composition, results in a large change in the refractoriness, causing the above-mentioned complicated problems. In addition to the above-mentioned drawbacks, molded bodies made of finely polished feldspar or pottery stone and clay have a low bulk density and therefore have a high shrinkage rate, resulting in deformation and dimensional variations in the quality of the finished product. This resulted in the following shortcomings.

ｐ、料が豊富であった時期には、実質的に同種類のまた
は所望の原料が比較的容易に入手可能であったので、本
発明のような必要性は特に認識されなかったものと考え
られる、しかし現時点では、上記のような原料の銘柄等
の変更は必然的であり、その変更によって多大の困難を
ともなう状況にある。本発明の主目的は、これらの困難
を解消することである。It is believed that the need for the present invention was not particularly recognized at a time when materials such as p. However, at present, it is inevitable to change the brands of raw materials as described above, and the situation is such that such changes bring about great difficulties. The main objective of the present invention is to overcome these difficulties.

解決するための手段 本発明者らは、原料粘土分と原料石分との比率を特定の
範囲内に維持して、該面分の少くも一種類を特定の粒度
範囲内に粗粉砕（以下に粗ずシということがある）する
ことによって、湿式押出成形用セラミック原料の他の物
性（成形性、焼成品の品質、等）を保持したまま耐火度
の低い面分（および／または粘土分）を含有する該セラ
ミック原料の耐火度を有利に調整できることを、予想外
にも見出した。これによって、上記の諸問題が有利に解
決された。Means for Solving the Problem The present inventors maintained the ratio of the raw clay content and the raw stone content within a specific range, and coarsely pulverized at least one type of the clay content to within a specific particle size range (hereinafter referred to as By roughening the ceramic raw material for wet extrusion molding, it is possible to reduce the surface area with low refractoriness (and/or clay content) while maintaining other physical properties (formability, quality of fired product, etc.). ) It has been unexpectedly found that the refractory strength of the ceramic raw materials containing the following can be advantageously adjusted. This advantageously solved the above problems.

発明の概要 従って本発明によって、湿式押出成形用セラミック原料
の粘土分と面分との重量比を適度な成形性を有する範囲
そして典型的には約５０１５０〜約４０／６０の範囲内
に維持し、該セラミック原料の少くも一種類の面分を３
５０メツシユ（開口約４４μｍ）篩残渣にて約１０〜約
５０重量％そして好ましくは約１５〜約４５重蛍％の範
囲内に粗粉砕することを特徴とする、該セラミック原料
の耐火度調整方法が提供される。ちなみに、従−来技術
によって習慣的もしくは経験的に微細磨されていた該面
分の該篩残渣は、５電値％以下であった。なお、本明細
書にてセラミック原料とは、陶磁器（陶器、せつ器、磁
器等）質製品用の原料（坏土等）を一般に意味する。代
表的には、陶磁器質タイル、瓦用の粘土分および面分を
含む原料を意味する。SUMMARY OF THE INVENTION Accordingly, the present invention maintains the clay to surface weight ratio of a ceramic raw material for wet extrusion within a range with adequate formability, typically from about 50,150 to about 40/60. , at least one surface of the ceramic raw material is
A method for adjusting the fire resistance of ceramic raw materials, which comprises coarsely pulverizing the residue through a 50-mesh (opening approximately 44 μm) sieve to a content of about 10 to about 50% by weight, preferably about 15 to about 45% by weight. is provided. Incidentally, the sieve residue on the surface that had been customarily or empirically finely polished by conventional techniques was 5% or less in electric value. Note that in this specification, the term "ceramic raw material" generally refers to a raw material (clay, etc.) for ceramic (earthenware, mortar, porcelain, etc.) quality products. Typically, it refers to raw materials containing clay and surface materials for ceramic tiles and roof tiles.

上記の本発明の基本的態様に従って、例えば（イ）該セ
ラミック原料の耐火度を一定に保持し、原料の銘柄を容
易に変更する態様、（ロ）該セラミック原料の組成およ
び銘柄等を一定に保持したまま、焼成温度の＾い窯にて
同品質の焼成品を得るために該原料の耐火度を向上させ
る態様、および（／→原料組成を一定に保持し、耐火度
の低い百分および／または粘土分を使用して、従来と同
品質のものを得る態様等の、耐火度の調整が有利に達成
される。In accordance with the above-mentioned basic aspects of the present invention, for example, (a) an aspect in which the refractory degree of the ceramic raw material is maintained constant and the brand of the raw material is easily changed; (b) an aspect in which the composition and brand of the ceramic raw material are kept constant; A method of improving the fire resistance of the raw material in order to obtain a fired product of the same quality in a kiln with a higher firing temperature while maintaining the raw material composition constant, and Adjustment of the fire resistance is advantageously achieved, such as by using clay content and/or obtaining the same quality as before.

作用 本発明において、セラミック原料の該百分の粒度を粗く
すると反応性すなわち焼結性が低下して熔化しにくくな
る。従って、該セラミック原料の耐火度が向上するので
、アルカリ分の多い百分および／または粘土分を使用し
ても満足な耐火度を有するセラミック原料が容易に得ら
れる。しかしながら、上記の作用は、該原料の粘土分と
百分との組成比を一定範囲内に維持して湿式押出成形性
を保持しかつ該百分を特定の粒度範囲に粗粉砕すること
によって、耐火度の調整および該成形性の保持を同時に
達成しながら、発現されねばならない。Function In the present invention, when the particle size of the ceramic raw material is made coarser, the reactivity, that is, the sinterability decreases, making it difficult to melt. Therefore, the refractory strength of the ceramic raw material is improved, so that a ceramic raw material having a satisfactory refractory strength can be easily obtained even if a high alkali content and/or a clay content is used. However, the above effect can be achieved by maintaining wet extrusion moldability by maintaining the composition ratio of clay content and percentage of the raw material within a certain range, and by coarsely pulverizing the percentage into a specific particle size range. This must be achieved while simultaneously adjusting the fire resistance and maintaining the formability.

実施例 以下に実施例および比較例によって、本発明を更に説明
する。これらは例示のためのものであシ、本発明はこれ
らの例によって限定されるものではない。なお、組成お
よび比率等の割合は特に指定しない限り、重量による。EXAMPLES The present invention will be further explained below with reference to Examples and Comparative Examples. These are for illustrative purposes only, and the invention is not limited by these examples. Note that compositions and ratios are based on weight unless otherwise specified.

例１〔耐火度は一定に保ち、原料の銘柄を変更する場合
〕 従来の坏土の調合は、重量％割合にて長石３６、陶石１
９、木節粘土１５、蛙目粘土３０で゛ある。この例では
、従来の陶石（以下に陶石Ａと記す）の代わシに、陶石
Ａより耐火度が低いため粒度を粗く粗ずカした陶石（以
下に陶石Ｂと記す・）を同重量％用いた。該粒度および
耐火度を下表に要約すヒ≦１□吟−−□□ζ悟−−−−
画嗣□−一■、□４い、−一〜２−−−−−−−−１甲
−一−−一一一−１ψ−胛咄一□−□−この陶石Ａ、Ｂ
を用いてそれぞれ湿式押出成形し、最高１２１０℃で３
８時間焼成した製品の吸水率を比較すると、従来品（０
，３２％）、本発明（０３８％）とほぼ等しく、焼成後
の製品の品質も変化なく一定となる、この理由は、本発
明の坏土における陶石Ｂは、アルカリ分を多く含み耐火
度は低いが粒度が粗い。粒度が粗いと反応（焼結）しに
くくなり、アルカリ分の少ない原料（従来の坏土）と同
様溶化しにくくなる。従っそ坏土（原料調合物）の耐火
度は、従来品と本発明品との間で変わらなくなる。また
、焼成品の品質（吸水率で代表される）も変わらなくな
る１、 もし陶石Ｂを従来通シ微細な粒度（陶石Ａと同じ）にし
た場合、坏土の耐火度を保つために、他の原料成分（長
石、キ葡粘土、蛙目粘土）の銘柄を変更するかまたはそ
れらの調合比率を変えなければならない。これに対し本
発明では、これらの操作を全く必要としない。原料事情
により他の銘柄に変更する場合でも、単にその新規採用
の原料銘柄を粗ずりするという操作で、耐火度を容易に
調整することができほぼ則−品質の焼成品を得ることが
できる、 例２〔原料（組成、銘柄）は一定にしておいて、焼成温
度の茜い窯を用いて従来と同じ品ｌＸ（吸水率が同じ）
を得るために、坏土の耐火度を上げる場合〕 従来は、坏土の耐火度を変えたい場合には、原料銘柄の
変更又は原料調合比率を変更しなければならなかった。Example 1 [When keeping the fire resistance constant and changing the brand of raw materials] The conventional clay formulation is 36% feldspar and 11% chinastone by weight.
9, Kibushi clay 15, Frogme clay 30. In this example, instead of the conventional pottery stone (hereinafter referred to as potter's stone A), a pottery stone (hereinafter referred to as potter's stone B) whose grain size is coarser and coarser than pottery stone A because it has a lower fire resistance than pottery stone A is used. were used in the same weight percent. The particle size and fire resistance are summarized in the table below.
Painter □-1■, □4ii, -1~2---1K-1--111-1ψ-Yuenichi □-□-This pottery stone A, B
Wet extrusion molding using
Comparing the water absorption rates of products baked for 8 hours, the conventional product (0
, 32%) is almost the same as the present invention (038%), and the quality of the product after firing remains constant without any change. is low, but the grain size is coarse. If the particle size is coarse, it will be difficult to react (sinter) and, like raw materials with low alkali content (conventional clay), it will be difficult to dissolve. Therefore, the fire resistance of the clay (raw material mixture) remains the same between the conventional product and the product of the present invention. In addition, the quality of the fired product (represented by the water absorption rate) will not change1.If pottery stone B is made to have a conventionally fine grain size (same as pottery stone A), it will be necessary to maintain the fire resistance of the clay. , it is necessary to change the brand of other raw materials (feldspar, clay, clay) or change their blending ratio. In contrast, the present invention does not require these operations at all. Even if you change to a different brand due to raw material circumstances, you can easily adjust the fire resistance and obtain fired products of approximately standard quality by simply roughening the newly adopted raw material brand. Example 2 [Materials (composition, brand) are kept constant, and the same product as the conventional product 1X (same water absorption rate) is produced using an amber kiln at a firing temperature.
Increasing the fire resistance of the clay in order to obtain the desired properties] Conventionally, if you wanted to change the fire resistance of the clay, you had to change the brand of raw materials or the mixing ratio of the raw materials.

しかし本発明では、これらの変更を行なわなくとも、原
料石分の粒度の変更のみによって坏土の耐火度を変える
ことができる９例えば、原料坏土を現行よシ茜い温度で
焼成して現行と同じ品質（同じ吸水率）を得たい場合、
すなわち耐火度を上げたい場合には、原料６分（長石、
陶石等）の粗ずシを行なえばよい。However, in the present invention, even without making these changes, the fire resistance of the clay can be changed only by changing the particle size of the raw material. If you want to obtain the same quality (same water absorption rate) as
In other words, if you want to increase the fire resistance, use 6 minutes of raw materials (feldspar,
All you have to do is rough-wash the pottery stone, etc.).

第１図は、原料面分中の長石の粒度のみを変化させ、そ
の際の二Ｊ髄成温度における坏土の耐火度（焼成品の吸
水率で表わす）の変化を示したグラフである。FIG. 1 is a graph showing the change in the refractory degree (expressed by the water absorption rate of the fired product) of the clay at the 2J pith formation temperature when only the grain size of the feldspar in the raw material surface was changed.

原料組成は例１と同じである。原料は湿式押出成形し下
記の温度で３８時間焼成した。３号窯（焼成温度１２１
Ｏ℃）で長石の粒度が（３５゜メツシュ残渣２．５％、
吸水率０．５４％）であるｔ不生を、同じ原料組成でほ
ぼ同一品質（即ち同一吸水率）を保ちつつ該３号窯よシ
も高温の２号窯（１２５０°）に適用するには、長石の
粒度を粗ず９する。この長石の粗ずシの程度は第１図に
おいて点線に示す如く、３５０メツシュ残渣４ｏ％であ
る。耐火度は吸水率０．５６％であシ、３号窯の場合と
ほぼ同一で同じ品質の焼成品が得られた。The raw material composition is the same as in Example 1. The raw materials were wet-extruded and fired at the following temperature for 38 hours. No. 3 kiln (firing temperature 121
0°C) and the particle size of feldspar is (35° mesh residue 2.5%,
In order to apply t-fusei, which has a water absorption rate of 0.54%) to the No. 2 kiln (1250°), which has the same raw material composition and almost the same quality (i.e., the same water absorption rate), the No. 3 kiln is also at a high temperature. The grain size of the feldspar is coarsened to 9. The degree of roughness of this feldspar is 350 mesh residue and 40%, as shown by the dotted line in FIG. The fire resistance was 0.56% water absorption, which was almost the same as in the case of No. 3 kiln, and a fired product of the same quality was obtained.

この例２では３号から２号窯に焼成温度を変えても、（
粘土分）／（５分）の比率は変らないため押出成形性に
は問題が生じない。In this example 2, even if the firing temperature is changed from No. 3 to No. 2 kiln, (
Since the ratio (clay content)/(5 minutes) does not change, there is no problem with extrusion moldability.

この例２での原料６分の粗ず９の粒度範囲は、例１と同
じ範囲であシ、３５０メツシユ（開口４４μｍ）篩残渣
で１０〜５０％（重量）である。なお、粗ずシする原料
６分は、上記した長石の他に陶石、ろう石でも同等の結
果が得られる。The particle size range of the raw material 6/6 coarse grain 9 in this Example 2 is the same range as in Example 1, and is 10 to 50% (weight) as a 350 mesh (opening 44 μm) sieve residue. In addition, in addition to the above-mentioned feldspar, the same results can be obtained with potter's stone and waxite as for the 6 minutes of coarsely grinding the raw material.

ちなみに、第１図において、Ｙ軸は焼成品の吸水率（％
）、Ｙ軸は粉砕した長石の管理残渣（３５０メツシー篩
残渣、重量％対数目盛）、曲線（１１は３号窯（最高温
度１２１０℃）の焼成によるグラフ、そして曲線（Ｉｌ
ｌは２号窯（最高温度１２５０℃）の焼成によるグラフ
を、それぞれ示す。Incidentally, in Figure 1, the Y-axis indicates the water absorption rate (%) of the fired product.
), the Y-axis is the control residue of crushed feldspar (350 mesh sieve residue, weight% logarithmic scale), the curve (11 is the graph of firing in No. 3 kiln (maximum temperature 1210°C), and the curve (Il
1 shows graphs obtained by firing in the No. 2 kiln (maximum temperature 1250°C).

例３〔原料組成は一定にしておいて、原料のうち５分お
よび粘土分の両者を耐火度の低い銘柄に変更したとき、
従来と同じ品質（吸水度が同じ）の坏土を得る場合〕原
料のうち粒度調整のできる５分（陶石）と粒度調整ので
きない粘土分において、ともに耐火度の低い銘柄に変更
する場合、（イ）新しい５分である陶石については、粗
ずりを行うことによシ化学組成的に低くなった耐火度を
現状の状態に維持し、（ロ）新しい粘土分についてはそ
の耐火度の低下分を現行のもうひとつの５分（長石）の
粒度を粗くすることによシ補正して、坏土としての耐火
度（吸水率で表わされる焼成品の品質）を現行と同じに
保つことができる。Example 3 [When keeping the raw material composition constant and changing both the 5% and clay components of the raw materials to brands with lower fire resistance,
When obtaining clay of the same quality (same water absorption) as before] When changing to a brand with lower fire resistance for both the 5-minute part of the raw material (pottery stone) whose particle size can be adjusted and the clay part whose particle size cannot be adjusted, (a) For the new 5-minute pottery stone, the fire resistance, which has become lower due to its chemical composition, will be maintained at the current state by roughening, and (b) For the new clay, the fire resistance will be lowered. The reduction should be corrected by coarsening the particle size of the current other 5-minute (feldspar) to keep the fire resistance (quality of fired products expressed by water absorption) of the clay the same as the current one. I can do it.

原料に関する組成および粒度を下表に示す。The composition and particle size of the raw materials are shown in the table below.

〔現行名〕　〔変更名〕 陶石の粗ずシ条件は、例１と同じであるっ目的も同じく
、陶石自体の耐火度の低下分を陶石の粗ずシで現行まで
引き上げるものである。一方、蛙目粘土の銘柄変更によ
りＡｔ　２０ｓとアルカリ分であるＲ２０　（７）成分
は、それぞれ（Ａｔ２０３２８．４％、Ｒ２０２，１％
）→（２６，３％、３．９％）と変更にな夛、耐火度が
低下した。この低下分を長石を粗ずシすることにより補
い、坏土全体としての耐火度を現行品と同じに維持する
ことができた。なお、成形および焼成は例１と同様に実
施した。[Current name] [Changed name] The conditions for shaving the pottery stone are the same as in Example 1.The purpose is also the same, to raise the reduction in the fire resistance of the pottery stone itself to the current level with the shavings of the pottery stone. be. On the other hand, due to the change in the brand of Frogme clay, the At 20s and alkaline R20 (7) components were reduced to (At20,328.4%, R202,1%, respectively).
)→(26.3%, 3.9%), the fire resistance decreased. By making up for this decrease by roughening the feldspar, we were able to maintain the fire resistance of the clay as a whole to the same level as the current product. Note that molding and firing were carried out in the same manner as in Example 1.

第２図は、現行調合および変更調合において、長石の粒
度を変えたときの焼成品の吸水率の変化を示したグラフ
である。従来、管理残渣２．５％に非常に細かく側層し
ていた長石を、管理残渣１３．０％に粗ずりするっ蛙目
粘土による耐火上の低下分を引き上げて、焼成品の耐火
度（吸水率で示す）は０，５６％となり、現行の品質と
同じにすることができた。ちなみに、第２図において、
Ｙ軸は焼成品の吸水率（％）、Ｙ軸は粉砕した長石の管
理残渣（３５０メツシー櫛残渣、重量％対数目盛）、曲
線−は現行調合品のそして曲線（Ｍは変更調合品のグラ
フを、それぞれ示す。FIG. 2 is a graph showing changes in water absorption of fired products when the particle size of feldspar is changed in the current formulation and modified formulation. The fire resistance of fired products ( The water absorption rate) was 0.56%, which was the same as the current quality. By the way, in Figure 2,
The Y-axis is the water absorption rate (%) of the fired product, the Y-axis is the control residue of crushed feldspar (350 Metsushi comb residue, weight % logarithmic scale), the curve - is that of the current formulation, and the curve (M is the graph of the modified formulation). are shown respectively.

効果の要約 本発明による代表的な効果を以下に要約する。Effect summary Typical effects of the present invention are summarized below.

化学組成的に耐火度の異なる原料（例えば銘柄の異なる
陶石）を粗ずシすることにより、■他の原料との調合比
率又は他の原料の銘柄変更を必要としない。■側層時間
が短縮される。例えば例１の原料組成で陶石Ａの場合の
２０時間が、本発明における陶石Ｂでは１０時間であシ
、生産効率が向上する。■更に、生素地から焼成品まで
の全収縮が小さくなる。例えば、例１の原料組成で陶石
Ａの場合の（１２８％）が、陶石Ｂの場合には（１１，
７％）となった。By slicing raw materials with different chemical compositions of fire resistance (for example, pottery stones of different brands), there is no need to change the mixing ratio with other raw materials or the brand of other raw materials. ■Side layer time is shortened. For example, 20 hours for pottery stone A with the raw material composition of Example 1 is 10 hours for pottery stone B according to the present invention, improving production efficiency. ■Furthermore, the total shrinkage from the raw material to the fired product is reduced. For example, in the raw material composition of Example 1, (128%) for pottery stone A is (128%), while for pottery stone B (11,
7%).

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

第１図は、坏土中の長石成分の粒度と焼成温度との関係
を示すグラフ（Ｉ）（最高１２１０℃）およびグラフ（
■）（最高１２５０’Ｃ）である。第２図は、坏土中の
陶石および粘土の両者の銘柄ｋＷ史した場合において、
長石成分の粒度と陶石の銘柄変更との関係を示すグラフ
狙（旧銘柄、微細塵）およびグラフ（５）（新銘柄、粗
粉砕）である。 ｔんライｆ！戎邊（幻Figure 1 shows graph (I) (maximum 1210°C) and graph (I) showing the relationship between particle size of feldspar components in clay and firing temperature.
■) (maximum 1250'C). Figure 2 shows the history of the brand kW of both pottery stone and clay in the clay.
Graph Aim (old brand, fine dust) and graph (5) (new brand, coarsely ground) show the relationship between the particle size of the feldspar component and the change in brand of pottery stone. Tnrai f! Ebisubabe (phantom)

Claims (4)

【特許請求の範囲】[Claims] （１）陶磁器質原料の粘土分と面分との重量比を適度な
湿式押出成形性を有する範囲内に維持し、該原料の少く
も一種類の面分を３５０メツシユ篩残渣にて実質的にｌ
Ｏ〜５０１量％の範囲に粗粉砕した該石分全使用するこ
とを％徴とする、粘土分および面分を含む湿式押出成形
用陶磁器質原料の耐火ｔＷ調整方法。(1) The weight ratio of the clay content to the surface content of the ceramic raw material is maintained within a range that provides suitable wet extrusion moldability, and at least one type of surface content of the raw material is substantially reduced to 350 mesh sieve residue. ni l
A method for adjusting the fire resistance tW of a ceramic raw material for wet extrusion molding containing a clay content and a surface content, which is characterized in that the entire stone content is coarsely pulverized to a range of 0 to 501% by weight. （２）該粘土分と面分との重量比が実質的に５０１５０
〜４０／６０の範囲である、特許請求の範囲第１項の方
法。(2) The weight ratio of the clay content to the surface content is substantially 50150
40/60. （３）　該原料の粘土分および面分の少くも一成分を耐
火度の低い材料に変更した際に、該原料の少くも一種類
の面分を特徴とする特許請求の範囲第１または第２項の
方法。(3) Claim 1 or 1, which is characterized by at least one kind of surface portion of the raw material when at least one of the clay and surface portions of the raw material is changed to a material with a low fire resistance. Method 2. （４）該原料の粘土分および面分の両者を耐火度の低い
材料に変更した際に、該原料の少くも二種類の面分を粗
粉砕する、特許請求の範囲第１または第２項の方法。(4) Claim 1 or 2, wherein when both the clay content and the face content of the raw material are changed to materials with low refractory properties, at least two types of face content of the raw material are coarsely pulverized. the method of.