TWI624444B - Method for producing Tianmu glaze ceramics by using fly ash - Google Patents

Abstract

A method for producing a Tianmu glaze ceramic product by using fly ash, which has the following steps: after drying the fly ash, sieving with a first mesh screen, and selecting a fly ash smaller than the first mesh as a first system The glaze raw material; after the dolomite is dried, broken and ground, a second glazing material is obtained by sieving through a second mesh screen; the first glazing raw material and the second glazing raw material are mixed in proportion. a powder raw material, adding an equal weight of deionized water, and uniformly mixing with a stirrer to obtain a fly ash glaze; the fly ash glaze is coated or immersed on the surface of one of the ceramics; The surface of the terracotta is placed in a high temperature furnace and heated and sintered to obtain a glazed ceramic product.

Description

Method for producing Tianmu glaze ceramics by using fly ash

The invention relates to a method for producing a Tianmu glaze ceramics by using fly ash, in particular to a tan glaze ceramic which can replace the brown glaze currently used in the market, and can also be produced through a suitable coating and sintering process. At the same time, it also recycles the fly ash business waste from coal-fired power plants and reuses it for high-value ceramic products. The glaze is prepared from fly ash and the glaze is used to produce Tianmu glaze ceramics.

Tianmu glaze is an iron crystal glaze from vermilion to deep red, also known as iron red glaze or spotted glaze. The glazed surface is brown or sea cucumber brown. It is distributed with iron-rich spherical or lotus-like isolated crystals with a diameter of about 5~10mm, which makes the whole utensils have a rare, noble and solemn texture. The phase separation of the Tianmu glaze is often multi-layered, that is, in the new phase formed after the first phase separation, due to the uneven distribution of the components, or the supersaturation of a certain component, phase separation or crystallization may occur again, which makes Tianmu glaze has a special flower glaze effect. Tianmu glaze is made of feldspar, kaolin, limestone, talc and ashes (apatite), and Fe2O3 is used as a crystal coloring agent. It is made into glaze slurry and applied to the blank tire, generally in the temperature range of about 1260~1360 °C. Burnt. The chemical composition of the glaze is characterized by high content of Fe2O3, CaO and P2O5, which are 7~12%, 8~9% and 5~7% respectively. Because the glaze layer of Tianmu glaze is formed by many finely dispersed tiny droplets, it increases the absorption and refraction of light. After firing, it naturally forms a deep brown color of sea cucumber, which is distributed with many orange-red plaques of broad bean and pea size. It is different from the microcrystalline glazes such as Venus glaze and iron embroidery, and some crystal glazes like large crystals such as zinc and titanium. Tianmu glaze is a kind of artistic glaze with high practical value, especially for decorative wall tiles and daily-use ceramic crafts, and the artistic effect is better.

The patent application of the conventional Tianmu glaze preparation, for example, the Republic of China invention patent I426061 "Method for preparing glaze from sludge of water source and ceramic product made from the glaze", which discloses preparation of sludge prepared from water source The method of glazing, after the sludge is screened and the unnecessary components or impurities are removed, dried and pulverized into fine particles or powder, and then calcined to form a raw material soil; The raw soil is analyzed to obtain the mineral or raw material component which is lacking in the raw material soil, and then added to make up the mineral or raw material component which is lacking, and then the glaze is formed.

Another Republic of China invention patent I422655 "oil glaze glaze prepared by using plant ash as raw material and its preparation method", which discloses an oil drop glaze glaze prepared by using plant ash as raw material, wherein plant ash accounts for 15~45wt %, add 85~55wt% flux.

However, the two patents were made from the sludge or plant ash of the water source. The pretreatment procedure is complicated, and the lack of minerals or fluxes is required to obtain the composition required for the preparation of the glaze. The coal-fired power plant produces more than 2 million metric tons of fly ash business waste every year. The source of the coal is quite sufficient. After a simple screening process, no additional chemical substances can be added to produce the Tianmu glaze.

In order to solve the aforementioned problems, we need a novel method for preparing a glaze from fly ash and producing a glazed ceramic article using the glaze.

The main object of the present invention is to disclose a method for producing a Tianmu glaze ceramic product by using fly ash, which can replace the brown glaze and the Tianmu glaze ceramic glaze which are currently used in the market.

Another object of the present invention is to disclose a method for producing a Tianmu glaze ceramic product by using fly ash, which also recycles the fly ash business waste of a coal-fired power plant into a ceramic art of high economic value.

The main object of the present invention is to disclose a method for producing a Tianmu glaze ceramic product by using fly ash, which comprises the following steps: after drying the fly ash, sieving with a first mesh screen and selecting less than the first mesh. Fly ash is a first glaze raw material; after the dolomite is dried, broken and ground, a second mesh sifting net is used to obtain a second glazing raw material; the first glazing raw material and the second glazing material The glaze raw materials are mixed in proportion to obtain a powder raw material, and an equal weight of deionized water is added, and uniformly mixed by a stirrer to obtain a fly ash glaze; the fly ash glaze is coated or immersed in the sinter One of the surface of the terracotta; and the surface of the terracotta is placed in a high temperature furnace for heating and sintering to obtain a glazed ceramic product.

The detailed description of the drawings and the preferred embodiments are set forth in the accompanying drawings.

1 is a schematic flow chart showing an embodiment of a method for producing a Tianmu glaze ceramic material by using fly ash according to the present invention.

2a is a schematic view showing a cross section of a fly ash glazed earthenware plate prepared by the method of the present invention and its electron microscope.

Fig. 2b is a schematic view showing a cross section of another fly ash glazed earthenware plate prepared by the method of the present invention and its electron microscope.

2c is a schematic view showing a cross section of another fly ash glazed earthenware plate prepared by the method of the present invention and its electron microscope.

Referring to FIG. 1 to FIG. 2c, FIG. 1 is a schematic flow chart of an embodiment of a method for producing a Tianmu glaze ceramic material by using fly ash; FIG. 2a is a schematic diagram of the method of the present invention. Schematic diagram of a cross section of a gray-eyed glazed earthenware plate and its electron microscope; FIG. 2b is a schematic view showing a cross section of another fly-ash glazed earthenware plate prepared by the method of the present invention and its electron microscope; FIG. 2c illustrates the present invention A schematic diagram of a cross section of another fly ash glazed terracotta plate prepared by the method and its electron microscope.

As shown in the figure, the first embodiment of the method for producing a Tianmu glaze ceramic article using fly ash according to the present invention comprises the following steps: after drying the fly ash, sieving with a first mesh screen, and selecting less than the first a fly ash of a mesh is a first glaze raw material (step 1); after the dolomite is dried, broken and ground, a second glazing material is sieved to obtain a second glaze raw material (step 2); Mixing the first glazing raw material and the second glazing raw material in proportion to obtain a powder raw material, adding equal weight of deionized water, and uniformly mixing with a stirrer to obtain a fly ash glaze (step 3); The gray glaze is coated or immersed on the surface of one of the ceramics (step 4); and the surface of the terracotta is placed in a high temperature furnace for heating and sintering to obtain a glazed ceramic product (step 5). .

In the step 1, after the fly ash is dried, it is sieved by a first mesh screen, and the fly ash smaller than the first mesh is selected as a first glazing raw material; wherein the fly ash is, for example but not limited to, In order to be taken from a coal-fired power plant, such as, but not limited to, a general fly ash or a modified fly ash, the fly ash is first dried to an average water content of, for example, but not limited to, 0.1% by weight; The mesh screen is for example but not limited to a screen of less than 200 mesh.

In the step 2, after the dolomite is dried, broken and ground, a second glazing material is obtained by sieving through a second mesh screen; wherein the second mesh screen is, for example but not limited to, greater than or A screen equal to 200 mesh.

In the step 3, the first glaze raw material and the second glaze raw material are mixed in proportion to obtain a powder raw material, and an equal weight of deionized water is added, and uniformly mixed by a stirrer to obtain a fly ash glaze; The proportion of the first glaze raw material in the powder raw material is, for example but not limited to, 50 to 100% by weight, and the ratio of the second glazing raw material in the powder raw material is, for example but not limited to, 0 to 50% by weight. The proportion of the powder raw material is, for example but not limited to, 50 to 70% by weight, and the ratio of the deionized water is, for example but not limited to, 30 to 50% by weight.

For example, in the powder raw material, when the ratio of the first glazing raw material is 50% by weight, the ratio of the second glazing raw material is 50% by weight; when the ratio of the first glazing raw material is 70% by weight, The proportion of the second glazing raw material is 30% by weight; when the ratio of the first glazing raw material is 100% by weight, the ratio of the second glazing raw material is 0% by weight; and when the ratio of the raw material of the powder is 50wt When % is used, the ratio of the deionized water is 50% by weight; when the ratio of the powder raw material is 70% by weight, the ratio of the deionized water is 30% by weight, and the fly ash glaze at this time will be thicker.

In the step 4, the fly ash glaze is coated or immersed on the surface of one of the ceramics.

In the step 5, the surface of the terracotta is placed in a high-temperature furnace and heated and sintered to obtain a glazed ceramic product; wherein the high-temperature furnace is placed under an atmosphere control, and when the oxygen content is high, oxidation and sintering are performed. In the case of anoxic state, reduction sintering is performed; in addition, the heating and sintering process is, for example but not limited to, heating from room temperature to 1200 to 1360 ° C for 4 hours, 1200 to 1360 ° C for 1 hour, and 1000 to 1200 ° C for holding temperature 1 Hours, then the furnace was cooled to room temperature.

As shown in FIG. 2a to FIG. 2c, the method for producing a Tianmu glaze ceramic product by using fly ash according to the present invention, the Tianmu glaze prepared by using fly ash is low in cost, and is an art glaze with high practical value, especially for decorative wall. Floor tiles and daily-use ceramic crafts have better artistic effects.

It can be seen from the above description that the method for producing Tianmu glaze ceramics by using fly ash has the following advantages: 1. It can recycle and utilize the fly ash clinker which is a by-product of a thermal power plant to reduce its inventory; The fly ash can be used to obtain the raw material composition required by the Tianmu glaze after appropriate screening; The Tianmu glaze prepared by fly ash is an art glaze with low cost and high practical value, especially for decorative wall tiles and daily-use ceramic handicrafts, and the artistic effect is better. Therefore, the method for producing a Tianmu glaze ceramic article using fly ash of the present invention is indeed more advanced than the conventional technology.

The disclosure of the present invention is a preferred embodiment. Any change or modification of the present invention originating from the technical idea of the present invention and being easily inferred by those skilled in the art will not deviate from the scope of patent rights of the present invention.

In summary, this case, regardless of its purpose, means and efficacy, is showing its technical characteristics that are different from the conventional ones, and its first invention is practical and practical, and it is also in compliance with the patent requirements of the invention. I will be granted a patent at an early date.

Claims (4)

A method for producing a Tianmu glaze ceramic product by using fly ash, comprising the following steps: after drying the fly ash, sieving with a first mesh screen, and selecting a fly ash smaller than the first mesh as a first system a glaze material, wherein the first mesh is a mesh of less than 200 mesh; after the dolomite is dried, broken and ground, a second mesh mesh is sieved to obtain a second glazing material, wherein the first The two mesh screen is a sieve mesh of 200 mesh or more; the first glaze raw material and the second glaze raw material are mixed in proportion to obtain a powder raw material, adding equal weight of deionized water, and uniformly mixed by a stirrer That is, the fly ash glaze is obtained, wherein the ratio of the first glaze raw material in the powder raw material is 50 to 99 wt%, and the ratio of the second glaze raw material in the powder raw material is 1 to 50 wt%, The proportion of the powder raw material is 50% by weight, and the ratio of the deionized water is 50% by weight; the fly ash glaze is coated or immersed on the surface of one of the ceramsites; and the surface of the terracotta is placed Heating and sintering in a high temperature furnace gives a day of glaze ceramics. The method of claim 1, wherein the surface of the terracotta is placed in a high temperature furnace for heating and sintering, and the heating and sintering process is as follows: from room temperature to 1200. Heat at ~1360 °C for 4 hours, hold at 1200~1360 °C for 1 hour, hold at 1000~1200 °C for 1 hour, then cool to room temperature. The method of claim 1, wherein the fly ash is a general fly ash or a modified fly ash. The method of claim 1, wherein the surface of the ceramic embryo is placed in a high-temperature furnace for heating and sintering, and the step of glazing ceramics is obtained in a day, and the high-temperature furnace is placed under an atmosphere control. When the oxygen content is high, oxidation sintering is performed, and in the case of anoxic state, reduction sintering is performed.