A preparation process of Chinese red ceramic products

Abstract

The invention discloses a preparation process of a Chinese red ceramic product, comprising the following steps: step 1, selecting and removing impurities from a Chinese red glaze material, mixing and ball-milling various glaze materials according to the proportion of the Chinese red glaze materials, and sieving to obtain a glaze slurry, and then adjusting the concentration of the glaze slurry to obtain a Chinese red glaze slurry; step 2, preheating a prepared ceramic body, cooling it to 60-70 DEG C, using the Chinese red glaze slurry to perform a primary glazing on the ceramic body, and after drying, performing a secondary heating on the ceramic body, and the secondary heating temperature is controlled at 60-70 DEG C, and then using the Chinese red glaze slurry to perform a secondary glazing on the ceramic body; the temperature of the ceramic body is increased before glazing, so that it is better combined with a glazing layer, and the secondary heating can quickly evaporate the moisture on the surface of the primary glazing, so that the secondary glazing is easier to adhere, and sodium carboxymethyl cellulose and glass fiber powder are added to the glaze for mixing, so as to improve the strength of the combination and improve the appearance of the ceramic product.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic product preparation, and in particular to a preparation process of Chinese red ceramic products. Background Art

[0002] Ceramics is a special product that is indispensable in human life and production. It has a history of thousands of years in human production history. In the long history of human development, people have made full use of the physical and chemical properties of ceramic materials to develop a variety of ceramic products such as daily-use ceramics, architectural ceramics, sanitary ceramics, artistic ceramics and special ceramics. Among them, daily-use ceramics are a variety of ceramic products and the oldest and most commonly used traditional ceramics. This type of ceramic product has the most extensive practicality and appreciation. For example, Chinese red ceramics is a ceramic fired at high temperature to produce a bright red color. Bright red is a favorite color of the Chinese people and has rich cultural connotations and a lofty spiritual realm.

[0003] The existing Chinese red ceramic glaze is a thin layer of glossy coating on the surface of the ceramic body, and its function is to improve the physical and chemical properties of the body surface. Since the strength of the glaze is relatively low, it is easy to crack even under slight impact or load. In addition, the glaze has high fluidity. Within a short period of time after glazing, it is easy for the glaze to flow across the surface of the ceramic body due to gravity, destroying the pattern, which not only easily causes defects but also affects the appearance of the ceramic products. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a preparation process of Chinese red ceramic products to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a preparation process of Chinese red ceramic products, comprising the following steps: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 60-70°C, and then use Chinese red glaze slurry to glaze the ceramic body for the first time. After drying, the ceramic body is reheated, and the reheating temperature is controlled at 60-70°C, and then the ceramic body is reglazed with Chinese red glaze slurry; Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 950-1050℃, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at a high temperature of 1100-1200℃ to form Chinese red ceramic products.

[0006] Preferably, the Chinese red glaze comprises the following raw materials (by mass): 5-10 parts of glaze clay, 1-2 parts of pumice, 2-5 parts of dolomite, 1-2 parts of quartz, 5-8 parts of fluorite, 1-2 parts of limestone, 1-2 parts of tin dioxide, 5-10 parts of kaolin, 15-20 parts of fly ash, 10-20 parts of red lead, 3-5 parts of gold red, 5-6 parts of pink, 3-8 parts of cobalt tetroxide, 1-2 parts of zinc nitrate, and 2-3 parts of zinc fluorosilicate.

[0007] Preferably, the Chinese red glaze comprises the following raw materials: 8 parts of glaze clay, 1.5 parts of pumice, 3 parts of dolomite, 1.5 parts of quartz, 6 parts of fluorite, 1.6 parts of limestone, 1.5 parts of tin dioxide, 7 parts of kaolin, 18 parts of fly ash, 15 parts of red lead, 4 parts of gold red, 5.5 parts of pink, 5 parts of cobalt tetroxide, 1.6 parts of zinc nitrate, and 2.5 parts of zinc fluorosilicate.

[0008] Preferably, the preparation of the Chinese red glaze slurry comprises the following steps: S1. First, the glass fiber is calcined at 180-220°C for 1.2-2h, and then crushed to obtain crushed material, and then washed with hydrochloric acid with a mass fraction of 30-40% for 30-50s, and then finely crushed again after drying, and then beaten and passed through a 200-220 mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 1-2 hours to obtain.

[0009] Preferably, the heating temperature of the mixing container is 55-65° C., and the sodium carboxymethyl cellulose and glass fiber are added while stirring, and the stirring speed is 400-600 r / min.

[0010] Preferably, the mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber is 1:5-3:0.2.

[0011] Preferably, in the step 1, the rotation speed of the ball milling equipment is 220 r / min, the ball milling time is 20-25 h, and the glaze after ball milling is passed through a 200-220 mesh sieve.

[0012] Preferably, the preheating in step 2 is firstly heated to 500-600°C at a heating rate of 2-5°C / min, kept at that temperature for 1-1.5h, and then heated to 800-1000°C at a heating rate of 2-3°C / min to remove moisture and other impurities in the ceramic body.

[0013] Preferably, the thickness of the first glazing is 0.4-0.6 mm, and the thickness of the second glazing is 0.6-0.8 mm.

[0014] Preferably, the glazing is performed by one of brushing, pouring, dipping and spraying.

[0015] The preparation process of the Chinese red ceramic product prepared by the present invention increases the temperature of the ceramic body before glazing so as to better combine with the glazing layer. The secondary heating can quickly evaporate the moisture on the surface of the first glazing, so that the secondary glazing is easier to adhere. Sodium carboxymethyl cellulose and glass fiber powder are added to the glaze to improve the bonding strength.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention mixes glaze powder with glass fiber powder, crushes the glass fiber and washes it with hydrochloric acid to make the surface of the glass fiber rough, thereby ensuring that the glaze can be well attached to the glass fiber. At the same time, sodium carboxymethyl cellulose is added to the glaze for mixing, which helps to bond the glaze particles and the glass fiber together, improves the viscosity of the glaze, prevents the glaze from flowing across the surface of the ceramic body due to gravity in a short time after glazing to destroy the pattern, and makes the glass fiber have good suspension performance, which helps to keep the solid particles of the glass fiber evenly dispersed in the glaze, prevents the particles from settling, thereby increasing the strength of the glaze, improving the molding performance of the Chinese red ceramic product, and improving the appearance of the ceramic product. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention of this embodiment provides a preparation process of Chinese red ceramic products, comprising the following steps: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 60-70°C, and then use Chinese red glaze slurry to glaze the ceramic body for the first time. After drying, heat the ceramic body for the second time, and control the temperature of the second heating at 60-70°C. Then use Chinese red glaze slurry to glaze the ceramic body for the second time. The first glazing makes the temperature of the ceramic body higher, so that it can be better combined with the glazing layer. The second heating can quickly evaporate the moisture on the surface of the first glazing, so that the second glazing is easier to adhere and the bonding strength is improved. Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 950-1050℃, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at a high temperature of 1100-1200℃ to form Chinese red ceramic products.

[0019] The Chinese red glaze of this embodiment includes the following raw materials (by mass): 5-10 parts of glaze clay, 1-2 parts of pumice, 2-5 parts of dolomite, 1-2 parts of quartz, 5-8 parts of fluorite, 1-2 parts of limestone, 1-2 parts of tin dioxide, 5-10 parts of kaolin, 15-20 parts of fly ash, 10-20 parts of red lead, 3-5 parts of gold red, 5-6 parts of pink, 3-8 parts of cobalt tetroxide, 1-2 parts of zinc nitrate, and 2-3 parts of zinc fluorosilicate.

[0020] The Chinese red glaze material of this embodiment includes the following raw materials: 8 parts of glaze clay, 1.5 parts of pumice, 3 parts of dolomite, 1.5 parts of quartz, 6 parts of fluorite, 1.6 parts of limestone, 1.5 parts of tin dioxide, 7 parts of kaolin, 18 parts of fly ash, 15 parts of red lead, 4 parts of gold red, 5.5 parts of pink, 5 parts of cobalt tetroxide, 1.6 parts of zinc nitrate, and 2.5 parts of zinc fluorosilicate.

[0021] The preparation of the Chinese red glaze slurry in this embodiment includes the following steps: S1. First, the glass fiber is calcined at 180-220°C for 1.2-2h, and then crushed to obtain crushed material, and then washed with hydrochloric acid with a mass fraction of 30-40% for 30-50s, and then finely crushed again after drying, and then beaten and passed through a 200-220 mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 1-2 hours to obtain.

[0022] The heating temperature of the mixing container in this embodiment is 55-65° C., and the sodium carboxymethyl cellulose and glass fiber are added while stirring at a stirring speed of 400-600 r / min.

[0023] The mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber in this embodiment is 1:5-3:0.2.

[0024] In step 1 of this embodiment, the rotation speed of the ball milling equipment is 220 r / min, the ball milling time is 20-25 h, and the glaze is sieved through a 200-220 mesh sieve after ball milling.

[0025] The preheating in step 2 of this embodiment is to first increase the temperature to 500-600°C at a heating rate of 2-5°C / min, keep the temperature for 1-1.5h, and then increase the temperature to 800-1000°C at a heating rate of 2-3°C / min to remove moisture and other impurities in the ceramic body.

[0026] The thickness of the first glazing in this embodiment is 0.4-0.6 mm, and the thickness of the second glazing is 0.6-0.8 mm.

[0027] The glazing of this embodiment is carried out by one of the following methods: brushing glaze, pouring glaze, dipping glaze and spraying glaze. Example 1

[0028] The present invention of this embodiment provides a preparation process of Chinese red ceramic products, comprising the following steps: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 60°C, and then glaze the ceramic body with Chinese red glaze slurry for the first time. After drying, heat the ceramic body for the second time, and control the secondary heating temperature at 60°C. Then, glaze the ceramic body for the second time with Chinese red glaze slurry; Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 950°C, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at 1100℃ to form Chinese red ceramic products.

[0029] The Chinese red glaze material of this embodiment includes the following raw materials (by mass): 5 parts of glaze clay, 1 part of pumice, 2 parts of dolomite, 1 part of quartz, 5 parts of fluorite, 1 part of limestone, 1 part of tin dioxide, 5 parts of kaolin, 15 parts of fly ash, 10 parts of red lead, 3 parts of gold red, 5 parts of pink, 3 parts of cobalt tetroxide, 1 part of zinc nitrate, and 2 parts of zinc fluorosilicate.

[0030] The preparation of the Chinese red glaze slurry in this embodiment includes the following steps: S1. First, the glass fiber is calcined at 180°C for 1.2h, and then crushed to obtain crushed material, and then washed with 30% hydrochloric acid for 30s, and then crushed again after drying, and then beaten and passed through a 200-mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 1 hour to obtain.

[0031] The heating temperature of the mixing container in this embodiment is 55° C., and sodium carboxymethyl cellulose and glass fiber are added while stirring at a stirring speed of 400 r / min.

[0032] The mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber in this embodiment is 1:5:0.2.

[0033] In step 1 of this embodiment, the rotation speed of the ball milling equipment is 220 r / min, the ball milling time is 20 h, and the glaze is sieved through a 200-mesh sieve after ball milling.

[0034] In the preheating of step 2 of this embodiment, the temperature is first increased to 500° C. at a heating rate of 2° C. / min, kept at that temperature for 1 hour, and then increased to 800° C. at a heating rate of 2° C. / min to remove moisture and other impurities in the ceramic body.

[0035] In this embodiment, the thickness of the first glazing is 0.4 mm, and the thickness of the second glazing is 0.6 mm.

[0036] The glazing in this embodiment is carried out by spraying glaze. Example 2

[0037] The present invention of this embodiment provides a preparation process of Chinese red ceramic products, comprising the following steps: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 66°C, and then glaze the ceramic body with Chinese red glaze slurry for the first time. After drying, heat the ceramic body for the second time, and control the secondary heating temperature at 66°C. Then, glaze the ceramic body for the second time with Chinese red glaze slurry; Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 1000°C, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at 1150℃ to form Chinese red ceramic products.

[0038] The Chinese red glaze material of this embodiment includes the following raw materials: 8 parts of glaze clay, 1.5 parts of pumice, 3 parts of dolomite, 1.5 parts of quartz, 6 parts of fluorite, 1.6 parts of limestone, 1.5 parts of tin dioxide, 7 parts of kaolin, 18 parts of fly ash, 15 parts of red lead, 4 parts of gold red, 5.5 parts of pink, 5 parts of cobalt tetroxide, 1.6 parts of zinc nitrate, and 2.5 parts of zinc fluorosilicate.

[0039] The preparation of the Chinese red glaze slurry in this embodiment includes the following steps: S1. First, the glass fiber is calcined at 200°C for 1.6 hours, and then crushed to obtain crushed material, and then washed with 35% hydrochloric acid for 40 seconds, and then crushed again after drying, and then beaten and passed through a 210-mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 1.5 hours to obtain.

[0040] The heating temperature of the mixing container in this embodiment is 60° C., and sodium carboxymethyl cellulose and glass fiber are added while stirring at a stirring speed of 500 r / min.

[0041] The mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber in this embodiment is 1:4:0.2.

[0042] In step 1 of this embodiment, the rotation speed of the ball mill is 220 r / min, the ball milling time is 22 h, and the glaze is sieved through a 210-mesh sieve after ball milling.

[0043] In the preheating of step 2 of this embodiment, the temperature is first increased to 550°C at a heating rate of 3°C / min, kept at this temperature for 1.2 hours, and then increased to 900°C at a heating rate of 2.5°C / min to remove moisture and other impurities in the ceramic body.

[0044] The thickness of the first glazing in this embodiment is 0.5 mm, and the thickness of the second glazing is 0.7 mm.

[0045] The glazing in this embodiment is carried out by dipping glaze. Example 3

[0046] The present invention of this embodiment provides a preparation process of Chinese red ceramic products, comprising the following steps: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 70°C, and then glaze the ceramic body with Chinese red glaze slurry for the first time. After drying, heat the ceramic body for the second time, and control the secondary heating temperature at 70°C. Then, glaze the ceramic body for the second time with Chinese red glaze slurry; Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 1050°C, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at 1200℃ to form Chinese red ceramic products.

[0047] The Chinese red glaze material of this embodiment includes the following raw materials (by mass): 10 parts of glaze clay, 2 parts of pumice, 5 parts of dolomite, 2 parts of quartz, 8 parts of fluorite, 2 parts of limestone, 2 parts of tin dioxide, 10 parts of kaolin, 20 parts of fly ash, 20 parts of red lead, 5 parts of gold red, 6 parts of pink, 8 parts of cobalt tetroxide, 2 parts of zinc nitrate, and 3 parts of zinc fluorosilicate.

[0048] The preparation of the Chinese red glaze slurry in this embodiment includes the following steps: S1. First, the glass fiber is calcined at 220°C for 2h, and then crushed to obtain crushed material, and then washed with 40% hydrochloric acid for 50s, and then crushed again after drying, and then beaten and passed through a 220-mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 2 hours to obtain.

[0049] The heating temperature of the mixing container in this embodiment is 65° C., and sodium carboxymethyl cellulose and glass fiber are added while stirring at a stirring speed of 600 r / min.

[0050] The mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber in this embodiment is 1:3:0.2.

[0051] In step 1 of this embodiment, the rotation speed of the ball mill is 220 r / min, the ball milling time is 25 h, and the glaze is passed through a 220-mesh sieve after ball milling.

[0052] In the preheating of step 2 of this embodiment, the temperature is first increased to 600°C at a heating rate of 5°C / min, kept at this temperature for 1.5 hours, and then increased to 1000°C at a heating rate of 3°C / min to remove moisture and other impurities in the ceramic body.

[0053] The thickness of the first glazing in this embodiment is 0.6 mm, and the thickness of the second glazing is 0.8 mm.

[0054] The glazing method of this embodiment is brushing.

[0055] Comparative Example 1. The difference from Example 3 is that ordinary glaze is used to prepare the Chinese red ceramic product.

[0056] Comparative Example 2. The difference from Example 3 is that no heating is performed before glazing.

[0057] The products of Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests; Five Chinese red ceramic samples were prepared, each group was divided into five groups with one sample, each group corresponded to Examples 1-3 and Comparative Examples 1-2 and were numbered A / B / C / D / E / , and finally the Chinese red ceramic samples of groups A / B / C / D / E / were tested respectively, wherein the crack resistance test was performed using GB / T34252-2017 for 6 cycles, and the glossiness test was performed using GB / T15614-2015, and the test results are shown in the following table;

[0058] It can be seen from Examples 1-3 that the preparation process of Chinese red ceramic products made by the present invention adds sodium carboxymethyl cellulose and glass fiber powder to the glaze, which helps to bond the glaze particles and glass fibers together, improve the viscosity of the glaze, prevent the glaze from flowing across the surface of the ceramic body due to gravity in a short period of time after glazing and destroying the pattern, and make the glass fiber have good suspension performance, thereby increasing the strength of the glaze.

[0059] It can be seen from Example 2 and Comparative Example 3 that the temperature of the ceramic body is increased before glazing to better combine with the glazing layer. The secondary heating can quickly evaporate the moisture on the surface of the first glazing, making the secondary glazing easier to adhere and improving the bonding strength.

[0060] The innovation of the present invention is: The present invention mixes glaze powder with glass fiber powder, crushes the glass fiber and washes it with hydrochloric acid to make the surface of the glass fiber rough, thereby ensuring that the glaze can be well attached to the glass fiber. At the same time, sodium carboxymethyl cellulose is added to the glaze for mixing, which helps to bond the glaze particles and the glass fiber together, improves the viscosity of the glaze, prevents the glaze from flowing across the surface of the ceramic body due to gravity in a short time after glazing to destroy the pattern, and enables the glass fiber to have good suspension performance, which helps to keep the solid particles of the glass fiber evenly dispersed in the glaze, prevents the particles from settling, thereby increasing the strength of the glaze, improving the molding performance of the Chinese red ceramic product, and improving the appearance of the ceramic product.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A process for preparing Chinese red ceramic products, characterized in that: The following steps are involved: Step 1: Select and remove impurities from the Chinese red glaze material, mix and ball-mill the glaze materials according to the proportion of the Chinese red glaze material, and sieve to obtain a glaze slurry, and then adjust the concentration of the glaze slurry to obtain a Chinese red glaze slurry; Step 2: preheat the prepared ceramic body, cool it to 60-70°C, and then use Chinese red glaze slurry to glaze the ceramic body for the first time. After drying, the ceramic body is reheated, and the reheating temperature is controlled at 60-70°C, and then the ceramic body is reglazed with Chinese red glaze slurry; Step 3: Send the glazed ceramic body into the kiln, then sinter it at a high temperature of 950-1050℃, and then cool it down to obtain a ceramic product; Step 4: Draw various patterns on the surface of the ceramic, then put it into the high-temperature furnace again and fire it at a high temperature of 1100-1200℃ to form Chinese red ceramic products.

2. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: The Chinese red glaze comprises the following raw materials (by mass): 5-10 parts of glaze clay, 1-2 parts of pumice, 2-5 parts of dolomite, 1-2 parts of quartz, 5-8 parts of fluorite, 1-2 parts of limestone, 1-2 parts of tin dioxide, 5-10 parts of kaolin, 15-20 parts of fly ash, 10-20 parts of red lead, 3-5 parts of gold red, 5-6 parts of pink, 3-8 parts of cobalt tetroxide, 1-2 parts of zinc nitrate and 2-3 parts of zinc fluorosilicate.

3. The preparation process of a Chinese red ceramic product according to claim 2, characterized in that: The Chinese red glaze includes the following raw materials: 8 parts of glaze clay, 1.5 parts of pumice, 3 parts of dolomite, 1.5 parts of quartz, 6 parts of fluorite, 1.6 parts of limestone, 1.5 parts of tin dioxide, 7 parts of kaolin, 18 parts of fly ash, 15 parts of red lead, 4 parts of gold red, 5.5 parts of pink, 5 parts of cobalt tetroxide, 1.6 parts of zinc nitrate, and 2.5 parts of zinc fluorosilicate.

4. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: The preparation of the Chinese red glaze slurry comprises the following steps: S1. First, the glass fiber is calcined at 180-220°C for 1.2-2h, and then crushed to obtain crushed material, and then washed with hydrochloric acid with a mass fraction of 30-40% for 30-50s, and then finely crushed again after drying, and then beaten and passed through a 200-220 mesh sieve; S2. Add deionized water into a mixing container and heat it, then add Chinese red glaze slurry into the deionized water, and then add sodium carboxymethyl cellulose and the glass fiber obtained in S1, mix well and continue stirring at a constant temperature for 1-2 hours to obtain.

5. The preparation process of a Chinese red ceramic product according to claim 4, characterized in that: The heating temperature of the mixing container is 55-65° C., and the sodium carboxymethyl cellulose and glass fiber are added while stirring, and the stirring speed is 400-600 r / min.

6. The preparation process of a Chinese red ceramic product according to claim 4, characterized in that: The mixing ratio of the Chinese red glaze slurry, deionized water and glass fiber is 1:5-3:0.

2.

7. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: In the step 1, the rotation speed of the ball mill is 220 r / min, the ball milling time is 20-25 h, and the glaze is sieved through a 200-220 mesh sieve after ball milling.

8. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: The preheating in step 2 is firstly to increase the temperature to 500-600°C at a heating rate of 2-5°C / min, keep the temperature for 1-1.5h, and then to 800-1000°C at a heating rate of 2-3°C / min to remove moisture and other impurities in the ceramic body.

9. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: The thickness of the first glazing is 0.4-0.6 mm, and the thickness of the second glazing is 0.6-0.8 mm.

10. The preparation process of a Chinese red ceramic product according to claim 1, characterized in that: The glazing is performed by one of the following methods: brushing glaze, pouring glaze, dipping glaze and spraying glaze.

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