CN106830689A - A kind of preparation method of Sub-shine glaze sanitary ceramics - Google Patents

Abstract

The invention discloses a method for preparing matte glazed sanitary ceramics, which comprises 27.8% to 29% of quartz, 25.5% to 26.9% of Changting potassium feldspar, 13.55% to 15.5% of calcite, 3.83% to 4.3% Dolomite, 3%~3.3% Zhangzhou kaolin, 9%~10.1% zirconium silicate, 9.83%~10.1% alumina, 3.2%~3.4% zinc oxide, 0.03%~0.04% carboxymethyl Sodium cellulose and 1.06% to 1.95% of soda ash are ball milled until the particle size of the slurry is less than 10 μm, and when the proportion is 60% to 65%, add ceramic coloring materials, and continue ball milling until the particle size is less than 10 μm, accounting for 69% to 71%. , passed through a 180-mesh sieve to obtain a uniform matte glaze slurry for sanitary ceramics, and then sprayed on the surface of the sanitary ceramic biscuit, after being fully dried, it was fired in a tunnel kiln at 1200-1250°C for 15-18 hours, and the matte glaze was obtained after cooling. ceramic products. The prepared matt glaze sanitary ceramics not only have a unique matt effect, but also overcome the problem of poor stain resistance of the traditional matt glaze, with pure color and rich aesthetic feeling.

Description

A kind of preparation method of matte glaze sanitary ceramics

technical field

The invention relates to the field of ceramics, in particular to a method for preparing matte glazed sanitary ceramics.

Background technique

In today's society, the continuous development of my country's real estate industry closely revolves around the huge market demand for sanitary ceramics associated with real estate. With the rapid development of China's ceramic production technology and technology, personalized products in the sanitary ware market are prominent, and product development has begun to tend to mid-range and high-end. With the improvement of consumers' personal income and appreciation taste, the demand for mid-to-high-end sanitary ceramic products continues to expand. In addition, with the improvement of infrastructure and the increasing investment in residential housing construction, with the steady growth of GDP, the income of ordinary people is also increasing, and they are beginning to pay attention to bathroom decoration. The demand for personalized high-end sanitary ceramics is increasing. In the future, personalized, The medium and high-end sanitary ceramics market has broad prospects.

Matte glaze is a kind of glaze between glossy glaze and matte glaze, that is: when the glaze is fired and melted, it does not completely flow and spread on the surface of the body, but forms fine or coarse particles, which are evenly distributed On the green body, a special artistic effect is formed. Matte ceramics can create a warm, comfortable, free and relaxed atmosphere. Due to the high refractive index of these crystals, a matt effect is produced, which also easily affects the compactness of the glaze and causes the glaze to absorb dirt, which limits its application in the field of sanitary ceramics.

Contents of the invention

The invention provides a method for preparing matt glazed sanitary ceramics, which overcomes the shortcomings of the prior art.

The technical solution adopted by the present invention to solve its technical problems is:

A method for preparing matte glazed sanitary ceramics, comprising the following steps:

1) Weigh 27.8% to 29% of quartz, 25.5% to 26.9% of Changting potassium feldspar, 13.55% to 15.5% of calcite, 3.83% to 4.3% of dolomite, 3% to 3.3% Zhangzhou kaolin, 9%~10.1% zirconium silicate, 9.83%~10.1% alumina, 3.2%~3.4% zinc oxide, 0.03%~0.04% sodium carboxymethyl cellulose and 1.06%~1.95% Put the soda ash into the ball mill, add water for ball milling, the ratio of material: ball: water is 1:1.2:0.45～0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm and the proportion is 60%～65%, so as to obtain a uniform basic glaze pulp;

2) Add 0.3% to 1% of ceramic pigments to the basic glaze slurry prepared in step 1), continue ball milling until the particle size is less than 10 μm and account for 69% to 71%, and end the ball milling, and pass through a 180-mesh sieve to obtain uniform sanitary ceramics matte glaze paste;

3) Spray the sanitary ceramic matt glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the moisture content is below 1%, and fire in a tunnel kiln at 1200-1250°C for 15-18 hours, and cool Finally, matte glaze sanitary ceramic products are obtained.

Preferably, the following steps are included:

1) Weigh 27.8% to 28.2% of quartz, 26.7% to 26.9% of Changting potassium feldspar, 13.55% to 14.55% of calcite, 3.83% to 3.94% of dolomite, 3% to 3.21% Zhangzhou kaolin, 10.0%~10.1% zirconium silicate, 9.83%~9.93% alumina, 3.2~3.3% zinc oxide, 0.03%~0.04% sodium carboxymethyl cellulose and 1.06%~1.95% Soda ash is put into a ball mill, and water is added for ball milling. The ratio of material: ball: water is 1:1.2:0.45~0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm, accounting for 60%~65%, and a uniform basic glaze slurry is obtained. ;

2) Add 1% silver-gray material for ceramics to the basic glaze slurry prepared in step 1), continue ball milling until the particle size is less than 10 μm and account for 69% to 71% of the ball milling, and pass through a 180-mesh sieve to obtain a uniform sanitary ceramic matt Glaze slurry, the silver-gray material for ceramics contains Sn and Sb;

3) Spray the sanitary ceramic matt glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the moisture content is below 1%, and fire in a tunnel kiln at 1200-1240°C for 15-16 hours, and cool Finally, a silver-gray matte glaze sanitary ceramic product is obtained.

Preferably, the following steps are included:

1) Weigh 28.0-29.0% of quartz, 25.5-26.5% of Changting potassium feldspar, 14.4-15.5% of calcite, 4.1-4.3% of dolomite, 3.3-3.4% of zinc oxide, 3.2% ～3.3% of Zhangzhou kaolin, 9.0～10.0% of zirconium silicate, 9.9～10.1% of alumina, 0.03%～0.04% of sodium carboxymethylcellulose and 1.06%～1.95% of soda ash are put into the ball mill, add water Carry out ball milling, the ratio of material: ball: water is 1:1.2:0.45-0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm and accounts for 60%-65%, so as to obtain a uniform basic glaze slurry;

2) Add 0.28% brownish-yellow ceramic colorant and 0.04% 196 red ceramic colorant to the basic glaze slurry prepared in step 1), and continue ball milling until the particle size is less than 10 μm and account for 69% to 71%. Pass through a 180-mesh sieve to obtain a uniform matte glaze slurry for sanitary ceramics;

3) Spray the sanitary ceramic matte glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the water content is below 1%, and fire in a tunnel kiln at 1202-1250°C for 15-18 hours, and cool Finally, beige matte glaze sanitary ceramic products are obtained.

Preferably, the density of the sanitary ceramic matte glaze slurry is 350±2g/200mL, the slurry temperature is 25±3°C, the viscosity _V0 is 80±5s/100mL, and the yield value is 10±4.

Preferably, the sanitary ceramic green body is made by the following method:

a. Weigh the raw material components according to the weight percentage of the green body: SiO ₂ 62.5-64%, Al ₂ O ₃ 22-23%, CaO 0-0.8%, MgO 0-0.7%, K ₂ O 2.5-3.5 %, Na ₂ O 0.3-0.5%, Fe ₂ O ₃ +TiO ₂ 1-1.5%, the remaining auxiliary raw materials 1-2%, the remaining auxiliary raw materials include alkali flour, water glass, dolomite; will contain the above-mentioned raw material components Ridge raw materials, non-ridge materials and other auxiliary raw materials are mixed, and an appropriate amount of water is added to refine them by ball milling. When the particle size reaches less than 10 μm and accounts for 59-61%, the slurry is discharged from the mill, and then the iron is removed, sieved, and refined. and stale mud;

b. Grouting the above mud in a gypsum model, drying the slurry at a temperature of 25 to 55°C and a humidity of 10 to 75% after grouting, consolidation, and demoulding until the moisture content is below 5%, to obtain the hygienic Ceramic bisque.

Preferably, the concentration of the mud is 353±2g/200mL, the particle size (<10μm) is 60±1, the viscosity _V0 is 60±10s/100mL, the viscosity _V30 is 90±10s/100mL, and the yield value is 12±10s/100mL. 3.

Zirconium silicate can make the glaze slurry have a certain opacity effect, so as to ensure that the matt glaze is not affected by the color of the green body, so as to ensure uniform and pure color rendering and luster. At the same time, when the content is high, it is easy to cause the glaze to lose the glaze effect and hinder the color development of the matte glaze.

The main function of silicon dioxide is to form the main component of matt glaze, which can improve the acid resistance and alkali resistance of matt glaze, and can improve the wear resistance and stability of glaze slurry after firing.

The main function of Changting potassium feldspar is as a flux for matte glaze. Simultaneously introduce SiO ₂ , Al ₂ O ₃ , Na ₂ O and K ₂ O into the glaze, and it is one of the most suitable raw materials for introducing color into matte glaze.

ZnO mainly acts as a flux, and it can improve the elasticity of the matt glaze, enhance the color of the chromogenic material, and increase the firing temperature range of the glaze.

The role of Zhangzhou kaolin in the glaze can mainly improve the uniformity and suspension of the matte glaze, make the glaze slurry not easy to precipitate, and provide a certain amount of aluminum oxide.

Aluminum oxide is one of the main components to form a matte glaze, and its addition can precipitate Al ₂ O ₃ microcrystals in the glaze layer, thereby achieving the matte effect of the glaze.

Compared with the prior art, the present invention has the following beneficial effects:

1. The matte glazed sanitary ceramics of the present invention is a pure ceramic material surface, adopts pure raw material base glaze, does not contain lead, boron and other harmful materials that are easy to ooze out, the glaze surface is smoother and smoother, the color is more stable and pure, and it can withstand Calcined for a long time and at high temperature, the surface after firing is smooth and flat, and has the advantages of wear resistance, corrosion resistance, pollution resistance, stability, and high grade. The glaze surface not only has a unique matte effect, but also overcomes the poor stain resistance of matte glaze.

2. The secondary feeding technology is adopted to effectively ensure the size of the chromogenic material and ensure that the chromogenic material is not easily damaged. It can be glazed on most sanitary ceramics, including washbasins, toilets, etc. It has strong adaptability and is easy to realize large-scale production.

3. The silver-gray system gives people a high-end, elegant, quiet and soft look. The combination of silver-gray color and matte glaze is applied to sanitary ceramic products, which has a unique personality and elegant style, and has a good application prospect and market prospect.

4. Light beige matt can create a warm, comfortable, free and relaxed atmosphere. The matt glaze is very aesthetic, and the owners can express their individuality through the matt glaze sanitary ceramics according to their own preferences. At the same time, the matt glaze has no strong reflection, which has significant benefits for protecting the vision of children and the elderly.

The following examples illustrate the present invention in further detail; but the preparation method of a matte glazed sanitary ceramic of the present invention is not limited to the examples.

detailed description

Example 1

The preparation of the silver-gray matte glaze sanitary ceramics in the present embodiment is realized according to the following steps: One, take by weighing 27.8% quartz, 26.7% Changting potassium feldspar, 13.55% calcite, 3.84% dolomite, 3.1% Zhangzhou Kaolin, 10% zirconium silicate, 9.83% aluminum oxide, 3.2% zinc oxide, appropriate amount of sodium carboxymethylcellulose and soda ash are loaded into a ball mill, and water is added for ball milling. Wherein, the quality of sodium carboxymethyl cellulose and soda ash accounts for 0.03% and 1.95% of the total mass of raw materials respectively. Material: Ball: The ratio of water is 1:1.2:0.45～0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm and the proportion is greater than 60%, so as to obtain a uniform basic glaze slurry; 2. In the basic glaze slurry prepared in step 1 Add 1% silver-gray material (main components: Sn and Sb), continue ball milling until the particle size is less than 10 μm and the proportion is greater than 69%, pass through a 180-mesh sieve to obtain a uniform silver-gray matt glaze slurry for sanitary ceramics; Ceramic silver-gray matte glaze slurry is sprayed on the surface of the sanitary ceramic body, and after being fully dried, it is put into a kiln and fired at 1200°C for 16 hours. After cooling, the silver-gray matte glazed sanitary ceramic product is obtained. The CR-10 color difference meter produced by the Japanese KONICA manufacturer is used to measure the L value of 77.9, a (red value): 0.2, b (yellow value): -1.1. Adopting KGZ-1A gloss meter to measure the glossiness of the product obtained in this embodiment is 12.7.

Example 2

The difference between this embodiment and Example 1 is that the composition ratios in step one are 27.8% quartz, 26.7% Changting potassium feldspar, 14.55% calcite, 3.83% dolomite, 3% Zhangzhou kaolin, 10% zirconium silicate , 9.83% aluminum oxide, 3.2% zinc oxide. The quality of sodium carboxymethyl cellulose and soda ash accounts for 0.03% and 1.06% of the total mass of raw materials respectively. The firing temperature in step 3 is 1220° C., and the firing time is 15 hours. The CR-10 color difference meter produced by the Japanese KONICA manufacturer was used to measure the L value of the product to be 75.1, a (red value): 0.3, b (yellow value): -0.5. Adopt KGZ-1A gloss meter to measure the glossiness of the product obtained in this embodiment to be 10.6. Other steps and parameters are the same as in Example 1.

Example 3

The difference between this embodiment and Example 1 is that the composition ratios in step one are 28.2% quartz, 26.8% Changting potassium feldspar, 13.55% calcite, 3.9% dolomite, 3.21% Zhangzhou kaolin, 10% zirconium silicate , 9.93% aluminum oxide, 3.3% zinc oxide. The quality of sodium carboxymethylcellulose and soda ash accounts for 0.03% and 1.14% of the total mass of raw materials respectively. The firing temperature in step 3 is 1240° C., and the firing time is 15.5 hours. The CR-10 color difference meter produced by the Japanese KONICA manufacturer was used to measure the L value of the product to be 78.7, a (red value): 0.5, b (yellow value): -1. Adopt KGZ-1A gloss meter to measure the glossiness of the product obtained in this embodiment to be 14.0. Other steps and parameters are the same as in Example 1.

Example 4

The difference between this example and Example 1 is that the composition ratios in step one are 27.8% quartz, 26.9% Changting potassium feldspar, 13.55% calcite, 3.94% dolomite, 3.1% Zhangzhou kaolin, and 10.1% zirconium silicate , 9.89% aluminum oxide, 3.2% zinc oxide. The quality of sodium carboxymethyl cellulose and soda ash accounts for 0.04% and 1.48% of the total mass of raw materials respectively. The firing temperature in step 3 is 1240° C., and the firing time is 15 hours. The CR-10 color difference meter produced by the Japanese KONICA manufacturer was used to measure the L value of the product to be 79.4, a (red value): -0.3, b (yellow value): -0.8. Adopt KGZ-1A gloss meter to measure the glossiness of the product obtained in this embodiment to be 8.4. Other steps and parameters are the same as in Example 1.

Example 5

(1) Preparation of light beige matt glaze for sanitary ceramics:

a. After mixing water, Changting potassium feldspar, quartz, calcite, dolomite, zinc oxide, alumina, Zhangzhou kaolin, zirconium silicate and ceramics with CMC and soda ash, put them into a ball mill for ball milling. When the particle size reaches less than 10μm When the proportion is 60-65%, the ball milling is over, and the basic glaze slurry is obtained;

b. Add brownish-yellow ceramic colorant and 196 red ceramic colorant to the above-mentioned basic glaze slurry, continue ball milling, and when the particle size reaches less than 10 μm (69-71)%, carry out the pulping and grinding, and pass 180 After the mesh sieve is refined and prepared, continue to stir evenly to obtain the light beige matt glaze for sanitary ceramics (concentration is 350±2g/200mL, slurry temperature is 25±5°C, viscosity _V0 is 80±5s/100mL , the yield value is 10±4);

The specific proportions of the above-mentioned components are as follows: using water as the medium, which contains 25.5-26.5% of Changting potassium feldspar, 28.0-29.0% of quartz, 14.4-15.5% of calcite, 4.1-4.3% of dolomite, 3.3-3.4% zinc oxide, 3.2-3.3% Zhangzhou kaolin, 9.0-10.0% zirconium silicate, 9.9-10.1% aluminum oxide, 0.28% brown-yellow ceramic pigment, 0.04% 196 red Coloring material for ceramics, 0.03%-0.04% sodium carboxymethyl cellulose and 1.06%-1.95% soda ash.

(2) preparing sanitary ceramic green body;

Weigh the raw material components according to the weight percentage of the green body: SiO ₂ 62.5-64%, Al ₂ O ₃ 22-23%, CaO 0-0.8%, MgO 0-0.7%, K ₂ O 2.5-3.5%, Na ₂ O 0.3～0.5%, Fe ₂ O ₃ +TiO ₂ 1～1.5%, other auxiliary raw materials 1～2%, other auxiliary raw materials include alkali flour, water glass, dolomite; Raw materials, non-ridged materials and other auxiliary materials are mixed, adding an appropriate amount of water and refined by ball milling. When the particle size reaches less than 10 μm and the proportion is 59-61%, the slurry is discharged from the mill, and then the iron is removed, sieved, refined and stale. Slurry, the concentration of the slurry is 353±2g/200mL, the particle size (<10μm) is 60±1, the viscosity V ₀ is 60±10s/100mL, the viscosity V ₃₀ is 90±10s/100mL, and the yield value is 12±3. ; grouting the above mud in a plaster model, drying the slurry at a temperature of 25 to 55°C and a humidity of 10 to 75% after grouting, consolidation and demoulding until the water content is below 5%, to obtain a sanitary ceramic green body .

(3) Apply the light beige matte glaze on the surface of the above-mentioned sanitary ceramic green body with a glazing spray gun, and dry in a drying kiln until the moisture content is below 1%, to obtain light beige matt glaze sanitary ceramics "white blank";

(4) Place the above-mentioned light beige matte glaze sanitary ceramics "white blank" on a synchronous shrinkage pad with a moisture content of less than 1%, and fire it in a tunnel kiln at 1202-1250°C for 15h-18h to obtain a light beige matte glaze. Light glazed sanitary ceramic products.

Example 6

According to the glaze formula in Table 2, calcite, zirconium silicate, dolomite, quartz, Changting potassium feldspar, zinc oxide, aluminum oxide, etc. in corresponding proportions are selected for batching, and sanitary ceramics are made according to the technical scheme of embodiment 5. Beige Matte Glaze:

Table 2 light beige matt glaze formula table (weight percent, %)

According to the technical scheme of embodiment 5, above-mentioned each group of sanitary ceramic light beige matte glaze is sprayed on above-mentioned corresponding each group of sanitary ceramic biscuit surface with compressed air spray gun, and the glaze application amount is 5mm～7mm, passes through drying kiln, Enter the tunnel kiln for firing, the highest firing temperature is 1200-1250°C, and the time is 900-1080min. After the quality inspection process, the light beige matte glaze product is finally produced, and the product color is stable and the color value is unique. The hair color of the parts is consistent without color difference, the color is pure, and has a silk texture, just like a bright moon in the sky, with strong decorative effect and artistic beauty. The indicators of the tested products are as follows in Table 3:

Table 3 product quality inspection results

Above-mentioned embodiment is only used for further illustrating the preparation method of a kind of matte glaze sanitary ceramics of the present invention, but the present invention is not limited to embodiment, any simple modification done to above embodiment according to technical essence of the present invention, is equivalent to Changes and modifications all fall within the protection scope of the technical solutions of the present invention.

Claims (6)

1. a preparation method of matt glaze sanitary ceramics, characterized in that it may further comprise the steps: 1) Weigh 27.8% to 29% of quartz, 25.5% to 26.9% of Changting potassium feldspar, 13.55% to 15.5% of calcite, 3.83% to 4.3% of dolomite, 3% to 3.3% Zhangzhou kaolin, 9%~10.1% zirconium silicate, 9.83%~10.1% alumina, 3.2%~3.4% zinc oxide, 0.03%~0.04% sodium carboxymethyl cellulose and 1.06%~1.95% Put the soda ash into the ball mill, add water for ball milling, the ratio of material: ball: water is 1:1.2:0.45～0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm and the proportion is 60%～65%, so as to obtain a uniform basic glaze pulp; 2) Add 0.3% to 1% of ceramic pigments to the basic glaze slurry prepared in step 1), continue ball milling until the particle size is less than 10 μm and account for 69% to 71%, and end the ball milling, and pass through a 180-mesh sieve to obtain uniform sanitary ceramics matte glaze paste; 3) Spray the sanitary ceramic matt glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the moisture content is below 1%, and fire in a tunnel kiln at 1200-1250°C for 15-18 hours, and cool Finally, matte glaze sanitary ceramic products are obtained. 2. preparation method according to claim 1, is characterized in that comprising the following steps: 1) Weigh 27.8% to 28.2% of quartz, 26.7% to 26.9% of Changting potassium feldspar, 13.55% to 14.55% of calcite, 3.83% to 3.94% of dolomite, 3% to 3.21% Zhangzhou kaolin, 10.0%~10.1% zirconium silicate, 9.83%~9.93% alumina, 3.2~3.3% zinc oxide, 0.03%~0.04% sodium carboxymethyl cellulose and 1.06%~1.95% Soda ash is put into a ball mill, and water is added for ball milling. The ratio of material: ball: water is 1:1.2:0.45~0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm, accounting for 60%~65%, and a uniform basic glaze slurry is obtained. ; 2) Add 1% silver-gray material for ceramics to the basic glaze slurry prepared in step 1), continue ball milling until the particle size is less than 10 μm and account for 69% to 71% of the ball milling, and pass through a 180-mesh sieve to obtain a uniform sanitary ceramic matt Glaze slurry, the silver-gray material for ceramics contains Sn and Sb; 3) Spray the sanitary ceramic matt glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the moisture content is below 1%, and fire in a tunnel kiln at 1200-1240°C for 15-16 hours, and cool Finally, a silver-gray matte glaze sanitary ceramic product is obtained. 3. preparation method according to claim 1, is characterized in that comprising the following steps: 1) Weigh 28.0-29.0% of quartz, 25.5-26.5% of Changting potassium feldspar, 14.4-15.5% of calcite, 4.1-4.3% of dolomite, 3.3-3.4% of zinc oxide, 3.2% ～3.3% of Zhangzhou kaolin, 9.0～10.0% of zirconium silicate, 9.9～10.1% of alumina, 0.03%～0.04% of sodium carboxymethylcellulose and 1.06%～1.95% of soda ash are put into the ball mill, add water Carry out ball milling, the ratio of material: ball: water is 1:1.2:0.45-0.5, and the ball milling is completed when the particle size of the slurry is less than 10 μm and accounts for 60%-65%, so as to obtain a uniform basic glaze slurry; 2) Add 0.28% brownish-yellow ceramic colorant and 0.04% 196 red ceramic colorant to the basic glaze slurry prepared in step 1), and continue ball milling until the particle size is less than 10 μm and account for 69% to 71%. Pass through a 180-mesh sieve to obtain a uniform matte glaze slurry for sanitary ceramics; 3) Spray the sanitary ceramic matte glaze slurry obtained in step 2) on the surface of the sanitary ceramic green body, dry in a drying kiln until the water content is below 1%, and fire in a tunnel kiln at 1202-1250°C for 15-18 hours, and cool Finally, beige matte glaze sanitary ceramic products are obtained. 4. The preparation method according to claim 1, characterized in that: the density of the sanitary ceramic matt glaze slurry is 350±2g/200mL, the slurry temperature is 25±3°C, and the viscosity _V0 is 80±5s/100mL , The yield value is 10±4. 5. The preparation method according to claim 1, characterized in that: the sanitary ceramic green body is made by the following method: a. Weigh the raw material components according to the weight percentage of the green body: SiO ₂ 62.5-64%, Al ₂ O ₃ 22-23%, CaO 0-0.8%, MgO 0-0.7%, K ₂ O 2.5-3.5 %, Na ₂ O 0.3-0.5%, Fe ₂ O ₃ +TiO ₂ 1-1.5%, the remaining auxiliary raw materials 1-2%, the remaining auxiliary raw materials include alkali flour, water glass, dolomite; will contain the above-mentioned raw material components Ridge raw materials, non-ridge materials and other auxiliary raw materials are mixed, and an appropriate amount of water is added to refine them by ball milling. When the particle size reaches less than 10 μm and accounts for 59-61%, the slurry is discharged from the mill, and then the iron is removed, sieved, and refined. and stale mud; b. Grouting the above mud in a gypsum model, drying the slurry at a temperature of 25 to 55°C and a humidity of 10 to 75% after grouting, consolidation, and demoulding until the moisture content is below 5%, to obtain the hygienic Ceramic bisque. 6. The preparation method according to claim 5, characterized in that: the concentration of the mud is 353±2g/200mL, the viscosity _V0 is 60±10s/100mL, the viscosity _V30 is 90±10s/100mL, and the yield value is 12±3.