JPH0450138A - Glaze for ceramic containing beer malt ash - Google Patents

Abstract

PURPOSE:To produce a ceramic glaze giving a fired article having a unique opaque color or novel TEN-MOKU pattern (a kind of tea-bowl pattern), etc., by burning and ashing brewer's grain produced as a by-product of beer and adding a specific amount of the produced ash to a glaze. CONSTITUTION:Brewer's grain (filtration residue of wort) produced as a by- product of beer is burnt and the formed ash is added in an amount of 5-60wt.% to a glaze. A glaze raw material having stable chemical composition can be produced by this process and the obtained ceramic glaze gives a fired article having unique opaque color and novel TEN-MOKU pattern, spot pattern or mottled pattern.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a new glaze for ceramics, and more specifically, the present invention relates to a new glaze for ceramics, and more specifically, a glaze containing ash having a unique chemical composition of beer grounds produced as a by-product during beer brewing. It concerns glazes for ceramics.

<Prior Art> Since ancient times, plant ash has been used as a raw material for ceramic glazes by blending it with other mineral raw materials (pottery stone, feldspar, clay, silica, limestone, etc.). The chemical composition of plant ash is characterized by the fact that rice straw ash and rice ash have silicic acid as the main component, and mortar ash has lime as the main component, and both also contain alumina, magnesia, alkali, etc. Although phosphoric acid is contained in plant ash, it is in a small amount, and the highest content in plant ash is about 2% (by weight).

However, the chemical composition varies greatly depending on the type of plant or the part of the same plant. Therefore, it is difficult to supply large amounts of plant ash with a stable composition as a raw material for glazes.

In addition, when glaze is applied to the surface of ceramics and fired at an appropriate temperature during use, it forms a thin glassy layer, but it is also possible to create a milky glaze due to the phosphoric acid content, that is, a milky state after firing. In order to produce a glaze that forms a thin layer of glaze, bone ash, calcium phosphate, etc. are added to the glaze as a component, regardless of whether plant ash is used as a component of the glaze raw material or not.

In addition, in order to create an emulsion glaze in a high-fired glaze, synthetic glazes often containing 1 to 6% of bone ash or calcium phosphate as a phosphoric acid component are commercially available.

[Summary of the invention]

Summary The present invention aims to provide a new glaze for ceramics that can be supplied in large quantities, has stable quality, and produces a characteristic glaze after firing, using a glaze raw material with a stable chemical composition. It is something to do.

The present inventors have discovered that beer lees (residue from wort filtration in the beer manufacturing process), which is a by-product during beer brewing, contains, for example, unsaccharified beer malt as a main component, and rice as a subcomponent.
Examples include those made of unsaccharified auxiliary raw materials such as corn grits and corn starch. ) was found to be able to achieve the above object by using ash as a glaze component in an amount within a specific range, and based on this knowledge, the present invention was completed.

That is, the glaze for ceramics according to the present invention burns and ashes beer lees, which is a by-product during beer production, and
It is characterized by containing 5 to 60% by weight as a blended component.

Effects> According to the present invention, since the ash of beer lees, which is produced in large quantities as a by-product during beer production, is used as a compounding ingredient, beer lees can be effectively utilized and a large amount of ceramic glaze with stable quality can be obtained. be able to. In addition, beer lees ash has a unique chemical composition compared to conventional plant ash, which gives ceramic glazes a unique emulsion after firing, and a novel glaze that is not found in other glazes. It is possible to produce glazes with characteristics such as grain, dot, or mottled shapes.

The fact that the ash of beer grounds has the above effects is that
This is understood to be unexpected for those skilled in the art.

[Detailed description of the invention]

The glaze for ceramics according to the present invention contains 5 to 60% by weight of ash (hereinafter also referred to as beer malt ash) produced by burning and ashing beer lees, which is a by-product during beer production, as a blended component. As mentioned above, the feature is that by applying it to the surface of the ceramic body during use and firing it at an appropriate temperature, a thin vitreous film with a characteristic appearance, that is, a glaze, is created on the surface of the ceramic body. (Hereinafter, percentages unless otherwise specified indicate weight percentages).

The beer lees as used in the present invention are the residues of wort from the beer manufacturing process. The main component is unsaccharified beer malt, but it may also contain unsaccharified auxiliary raw materials (for example, rice, corn grits, cornstarch, etc.) as an auxiliary component.

Beer malt ash> In the present invention, the ashed product of beer lees, that is, beer malt ash, is produced by ashing the beer lees as described above using a general ashing device, such as a fluidized bed combustion device, an electric furnace, or a gas furnace. It is ashed by burning at an appropriate temperature, specifically about 700 to 1100°C. For combustion, the beer grounds are purified as necessary by suitable purification means, such as a vibrating sieve, and reduced to a suitable moisture content, preferably 70%, by suitable dehydration means, such as a belt press or screw press. It is desirable to dehydrate in advance to the following degree.

The chemical composition of the beer malt ash in the present invention is characterized by containing a large amount of amorphous silicic acid and phosphoric acid, especially compared to that of conventional straw ash, rice ash, or mortar ash. be.

By using this glaze with such a specific composition, as described below, with an appropriate amount, a unique emulsion glaze can be created after firing, and new grain-shaped, dot-shaped, or It begins to form a distinctive glaze with mottled patterns.

Table 1 below shows an example of the chemical composition of beer malt ash in comparison with conventional plant ash.

Glaze for ceramics according to the present invention is made by blending the above-mentioned beer malt ash with other raw ingredients,
60%, preferably 10 to 55%.

Other raw material components are mineral raw materials. Examples include pottery stone, feldspar, clay, silica stone, limestone, etc., and one or more of these components can be selected and used.

In addition, the above-mentioned compounding ratio is weight% when the total of the mineral raw material and beer malt ash is taken as 100.

The glaze is in the form of a powder, and is generally applied in the form of a vortex suspended in water.

The glaze according to the invention produces a glaze with a unique aesthetic appearance after firing due to the beer malt ash content. In other words, beer malt ash containing 5 to 15%, preferably 10 to 15%, produces a unique milk that can be visually distinguished from other straw ash, rice ash, and other ingredients. Produces a milky (densely distributed microcrystals) or matte (matte glaze, very densely distributed microcrystals) glaze with a turbid glaze tone (texture and luster).

When the blending ratio of beer malt ash is 15% to 60%, preferably about 55%, the glaze may be mottled (shaded) due to the phase separation phenomenon that occurs during the melting by firing of the glaze, that is, the vitrification process. A unique glaze with a striped pattern) or a dotted pattern (small dots uniformly present) is generated, and as the blending ratio of beer malt ash increases, the above specificity increases or becomes obvious. New glazes such as large-scale (evenly distributed large dots), dots, and mottled glazes are produced, which are not seen when other conventional glazes are used.

Examples of combinations of ingredients in the glaze according to the present invention are shown in Experimental Examples.

The glaze according to the present invention can be colored to a desired color after firing by further adding and blending an appropriate coloring agent, such as ferric oxide, manganese oxide, cobalt oxide, nickel oxide, or chromium oxide, as necessary. You can make it so that

Firing/Glaze Formation> After the glaze according to the present invention is applied to the surface of a ceramic base in a spiral shape, the glaze is heated under normal firing conditions, that is, usually 1200 to
By firing under oxidizing flame or reducing flame at a temperature of about 1300°C, a glaze with a unique appearance as described above is formed. Regarding the general method of firing, there are known documents such as "Glaze and its Pigments" by Hiroshi Soki (
First published on October 20, 1963, ■Gihodo), etc. can be referred to.

Experimental Examples The following are some experimental examples of the present invention that form the most characteristic glazes, but the present invention is not limited thereto.

Preparation example: Preparation of beer malt ash Beer lees produced from saccharification with a raw material composition of 75% malt and 25% auxiliary materials (rice, corn grits, corn starch) are dehydrated to 65% moisture and burned at 1000°C. Prepared.

Preparation Example: Preparation of Glaze Using the beer malt obtained in Preparation Example, a glaze was prepared according to the formulation shown in Table 2.

[Caution] The numbers in the table are weight percentages. Firing Example 1: Formation of dotted glaze By firing a glaze containing 50% beer malt (Preparation Example 1) at 1200-1300°C, the glaze melts. A very unusual glaze with circular dots was obtained due to the cohesive force.

Firing Example 2: Formation of a milky white glaze By firing a glaze containing 10% beer malt (Preparation Example 2) at 1,200-1,300°C, the glaze produced a milky white glaze compared to conventional glazes using bone ash or phosphoric acid. hand,
A unique milky white glaze was obtained.

Firing Example 3: Formation of iron red glaze Adding 11% of a coloring agent (ferric oxide) to a glaze containing 17% beer malt (Preparation Example 3)
By adding 0:11) and firing at 1200-1300°C, a dotted iron red glaze, which is more distinctive than conventional synthetic glazes using bone ash, calcium phosphate, etc., was obtained.

Firing Example 4: Formation of a yellow-green matte glaze Add 11% of a coloring agent (ferric oxide) to a glaze (Preparation Example 4) in which a barium-based glaze contains 11% of beer malt (Glaze 2 Colorant-100: 11) Add 1200-1300
A yellow-green matte glaze was obtained by firing with an oxidizing flame at 0.degree. C., and a silver chocolate-colored matte glaze was obtained by firing with a reducing flame.

Firing Example 5: Formation of a mottled glaze A new mottled shaft was obtained by firing a barium-based glaze containing 40% beer malt (Preparation Example 5) at 1200-1300''C.

Firing Example 6: Formation of red-black Tenmoku glaze Adding 11% of a coloring agent (ferric oxide) to a glaze containing 17% beer malt (Preparation Example 6)
:11) was added and fired at 1,200 to 1,300°C to obtain a new red and black tenmoku glaze with red and black markings.

Claims (1)

[Claims] 1. A glaze for ceramics, which contains 5 to 60% by weight of ash produced by burning and ashing beer lees, which is a by-product during beer production, as a blended component.