A kind of supplement for sanitary ceramic dry blank and preparation method thereof

Abstract

This application relates to the technical field of sanitary ceramics preparation, specifically disclosing a repair agent for sanitary ceramic dry blanks and its preparation method. The repair agent for sanitary ceramic dry blanks includes molten metal powder, silica powder, raw material, glaze slurry, sodium carboxymethyl cellulose solution, and medium-temperature frit powder. The preparation method involves mixing the glaze slurry and raw material in the sodium carboxymethyl cellulose solution, and then adding the molten metal powder, silica powder, and medium-temperature frit powder to the prepared slurry and mixing thoroughly. The repair agent for sanitary ceramic dry blanks of this application can be used to repair sanitary ceramic dry blanks with defects such as cracks, and it has the advantage of reducing the adverse effects on the yield of high-quality blanks.

Description

Technical Field

[0001] This application relates to the technical field of sanitary ceramics preparation, and more specifically, it relates to a supplement for sanitary ceramic blanks and a method for preparing the same. Background Technology

[0002] Sanitary ceramics forming is mainly based on the plasticity of the raw material, which is used to shape the raw material into various shapes. After drying, the raw material is fired to produce the finished sanitary ceramic product. During the ceramic production process, the plastic clay in the raw material can easily cause shrinkage during firing, resulting in defects such as cracks in the raw material.

[0003] To reduce the defect rate in sanitary ceramics production, cracks on the blank are usually repaired using raw materials, and the repaired blank is then fired a second time to dry the repaired area. However, because the raw material at the repaired area contains plastic clay that has not been fired, the repaired area is prone to detaching during the second firing, thus negatively impacting the yield of high-quality blanks. Summary of the Invention

[0004] In order to reduce the adverse impact on the yield of high-quality blanks, this application provides a supplement for dry blanks of sanitary ceramics and its preparation method.

[0005] In a first aspect, this application provides a supplement for dry sanitary ceramic blanks, employing the following technical solution:

[0006] A supplement for dried sanitary ceramic blanks comprises the following raw materials in parts by weight:

[0007] 40-60 parts of clinker powder, 5-15 parts of silica powder, 10-30 parts of blank, 5-15 parts of glaze slurry, 0.5-1 parts of sodium carboxymethyl cellulose solution with a mass fraction of 1-2%, and 4-6 parts of medium-temperature frit powder.

[0008] By adopting the above technical solution, clinker powder is added to the billet to improve the refractoriness of the filler, making the refractoriness of the filler higher than that of the billet. This results in the formation of some pores in the filler during the second firing of the dry billet, thereby reducing the firing shrinkage of the filler and the possibility of cracking or detachment during the second firing process. The silica powder added to the filler undergoes slight volume expansion during firing and forms a skeleton at the repair site of the dry billet, thus offsetting some of the firing shrinkage during the second firing of the filler. Since the shrinkage rate of the dry billet during the second firing process is greater than that of the filler, compressive stress is generated at the repair site of the dry billet, improving the bonding strength between the repair site and the dry billet. The sodium carboxymethyl cellulose solution has viscosity at room temperature, making it easier to bond the prepared filler to the cracks in the dry billet, reducing the possibility of the repair site detaching from the dry billet at room temperature.

[0009] The glaze slurry and medium-temperature frit powder further increase the viscosity of the additive during the second firing of the dry blank, thereby improving the bonding strength between the additive and the dry blank at high temperatures. This further reduces the possibility of the repaired area detaching from the dry blank after the second firing, making it easier to repair the dry blank with cracks and reducing the adverse impact on the production of high-quality blanks.

[0010] Preferably, the silicon micro powder has a particle size of 100±10 mesh, and the medium-temperature frit powder has a particle size of 200±10 mesh.

[0011] By adopting the above technical solution, silicon micro powder and medium-temperature frit powder with the above particle size are mixed with other raw materials to prepare a supplement. At this time, the silicon micro powder and medium-temperature frit powder form a structural skeleton in the prepared supplement, and at the same time, the powder in the prepared supplement is more tightly bound, further reducing the possibility of the supplement undergoing firing shrinkage. When the particle size of silicon micro powder and medium-temperature frit powder is larger than the above value, it is easy to cause the particle size of silicon micro powder and medium-temperature frit powder to be too large, making it difficult for the powder in the raw materials to form a stable particle size distribution, which will have an adverse effect on the bonding tightness. When the particle size of silicon micro powder and medium-temperature frit powder is smaller than the above value, it is easy to cause separate agglomeration, making it difficult to be evenly distributed in the supplement, which will affect the compactness of the powder particles.

[0012] Preferably, the clinker powder is prepared by mixing waste porcelain powder and calcined bauxite in a weight ratio of (6-10):2.

[0013] By adopting the above technical solution, the waste porcelain powder and calcined bauxite are mixed to prepare clinker powder, thereby reusing the waste porcelain material. At the same time, the refractoriness of the filler is higher than that of the dry blank. As a result, during the second firing, the filler forms internal pores due to incomplete firing, reducing the firing shrinkage at the repaired part of the dry blank. This reduces the possibility of cracking or falling off at the repaired part of the dry blank, and reduces the adverse impact on the production of high-quality blanks.

[0014] Preferably, the waste porcelain powder is prepared by mixing 60±10 mesh waste porcelain powder and 100±10 mesh waste porcelain powder in a weight ratio of (1-3):1, and the calcined bauxite is prepared by mixing 60±10 mesh calcined bauxite and 100±10 mesh calcined bauxite in a weight ratio of (1-3):1.

[0015] By adopting the above technical solution, waste porcelain powder and calcined bauxite are both formulated from 60-mesh and 100-mesh powder particles, thereby forming a particle size distribution with other powders in the raw materials, and further forming a dense powder in the filler. At this time, the large particles in the filler form a structural stock, and the small powder particles fill the gaps between the large particles, reducing the possibility of shrinkage during firing of the filler, and thus reducing the possibility of cracking or falling off at the repaired part of the dry blank.

[0016] Preferably, the raw materials also include 3-5 parts of heavy calcium carbonate powder.

[0017] By adopting the above technical solution, heavy calcium carbonate is added to the raw materials. When the cracks on the dry blank are repaired with the additive and then fired a second time, the heavy calcium carbonate decomposes at high temperature and generates calcium oxide and carbon dioxide. This further forms gas in the additive and compensates for the firing shrinkage of the additive, reducing the possibility of cracking or falling off at the repair site of the dry blank, and further reducing the adverse impact on the yield of high-quality blanks.

[0018] Preferably, the heavy calcium carbonate powder is modified heavy calcium carbonate powder, which is prepared by zinc stearate and heavy calcium carbonate in a weight ratio of (1-2):100, and is prepared by the following steps:

[0019] Heavy calcium carbonate powder is stirred in a water bath at 60-80℃ at a speed of 600-800 r / min. Zinc stearate is added to the heavy calcium carbonate powder by weight and mixed for 30-70 min. After cooling, modified heavy calcium carbonate powder is obtained.

[0020] By adopting the above technical solution, zinc stearate is chemically bonded to heavy calcium carbonate to obtain modified heavy calcium carbonate. This does not change the crystal structure of heavy calcium carbonate, but improves its dispersibility, making it easier for the heavy calcium carbonate to be evenly distributed in the filler. When the filler is prepared, the zinc stearate on the modified heavy calcium carbonate dissolves in water. At this time, the zinc stearate further thickens the filler, improving the adhesion of the filler to the dry blank at room temperature. During the second firing, the zinc stearate decomposes at high temperature to form zinc oxide, which improves the toughness and hardness of the repaired part of the dry blank and improves the mechanical properties of the repaired part of the dry blank.

[0021] Secondly, this application provides a method for preparing a supplement for sanitary ceramic blanks, using the following technical solution:

[0022] A method for preparing a supplement for dried sanitary ceramic blanks includes the following steps:

[0023] The glaze slurry and the blank are added to the sodium carboxymethyl cellulose solution according to the weight ratio and mixed evenly to obtain the slurry;

[0024] The clinker powder, silica powder and medium-temperature frit powder are added to the prepared slurry according to the weight ratio and mixed evenly to prepare a supplement for sanitary ceramic blanks.

[0025] By adopting the above technical solution, after mixing sodium carboxymethyl cellulose solution, raw material and glaze slurry to obtain a slurry, clinker powder, silica powder and medium-temperature frit powder are added to the slurry and mixed evenly, which facilitates the mixing of raw materials and makes it easier to obtain a supplement for dry sanitary ceramic blanks.

[0026] A method for preparing a supplement for dried sanitary ceramic blanks includes the following steps:

[0027] The glaze slurry and the blank are added to the sodium carboxymethyl cellulose solution according to the weight ratio and mixed evenly to obtain the slurry;

[0028] The clinker powder, silica powder, heavy calcium carbonate and medium-temperature frit powder are mixed in parts by weight to obtain dry powder.

[0029] The prepared dry powder is added to the prepared slurry and mixed evenly to obtain a supplement for sanitary ceramic blanks.

[0030] By adopting the above technical solution, after mixing sodium carboxymethyl cellulose solution, raw material and glaze slurry to obtain slurry, clinker powder, silica powder, heavy calcium carbonate and medium-temperature frit powder are mixed to obtain dry powder, and the dry powder and slurry are mixed. At this time, the heavy calcium carbonate is first mixed with other powders in the raw materials, and then mixed with slurry, which facilitates the uniform dispersion of heavy calcium carbonate and facilitates the preparation of a supplement for sanitary ceramic dry body.

[0031] In summary, this application has the following beneficial effects:

[0032] 1. The clinker powder makes the refractoriness of the filler higher than that of the blank, and generates some pores in the filler during the second firing of the dry blank, reducing the firing shrinkage of the filler; the silica powder undergoes slight volume expansion during firing and forms a skeleton at the repair site of the dry blank, offsetting some of the firing shrinkage, resulting in compressive stress at the repair site of the dry blank during the second firing, improving the bonding strength between the repair site and the dry blank; the sodium carboxymethyl cellulose solution facilitates the bonding of the filler to the cracks in the dry blank, reducing the possibility of the repair site detaching from the dry blank at room temperature; the glaze slurry and medium-temperature frit powder facilitate the improvement of the bonding strength between the filler and the dry blank at high temperature, reducing the possibility of the repair site detaching from the dry blank after the second firing.

[0033] 2. Waste porcelain powder and calcined bauxite are both made from 60-mesh and 100-mesh powder particles, which together form a particle size distribution with other powders in the raw materials. This further forms a dense powder in the additive. At this time, the large particles in the additive form a structural stock, and the small powder particles fill the gaps between the large particles, reducing the possibility of shrinkage during firing.

[0034] 3. Zinc stearate modifies heavy calcium carbonate, which improves the dispersibility of heavy calcium carbonate. When the additive is prepared, the zinc stearate on the modified heavy calcium carbonate dissolves in water and thickens the additive, improving the adhesion of the additive to the dry blank at room temperature. During the second firing, the zinc stearate decomposes at high temperature and forms zinc oxide, which improves the toughness and hardness of the repaired part of the dry blank. Detailed Implementation

[0035] The present application will be further described in detail below with reference to preparation examples and embodiments.

[0036] raw material

[0037] All raw materials used in the preparation examples and embodiments are commercially available. The sodium carboxymethyl cellulose solution was prepared from sodium carboxymethyl cellulose powder and deionized water.

[0038] Preparation Example

[0039] Preparation Example 1: Clinker Powder

[0040] Preparation Example 1.1

[0041] A type of cooked food powder is prepared by the following steps:

[0042] Mix 22.5 kg of 60-mesh waste porcelain powder and 22.5 kg of 100-mesh waste porcelain powder to obtain mixed waste porcelain powder;

[0043] Mix 7.5 kg of 60-mesh calcined bauxite and 7.5 kg of 100-mesh calcined bauxite to obtain mixed calcined bauxite;

[0044] The prepared mixed waste porcelain powder and the prepared mixed calcined bauxite are mixed evenly to obtain clinker powder.

[0045] Preparation Example 1.2

[0046] Unlike Preparation Example 1.1, in Preparation Example 1.2, the amount of 60-mesh waste porcelain powder added was 24 kg, the amount of 100-mesh waste porcelain powder added was 24 kg, the amount of 60-mesh calcined bauxite added was 6 kg, and the amount of 100-mesh calcined bauxite added was 6 kg.

[0047] Preparation Example 1.3

[0048] Unlike Preparation Example 1.1, in Preparation Example 1.3, the amount of 60-mesh waste porcelain powder added was 25 kg, the amount of 100-mesh waste porcelain powder added was 25 kg, the amount of 60-mesh calcined bauxite added was 5 kg, and the amount of 100-mesh calcined bauxite added was 5 kg.

[0049] Preparation Example 1.4

[0050] Unlike Preparation Example 1.2, in Preparation Example 1.4, the amount of 60-mesh waste porcelain powder added was 32 kg, and the amount of 100-mesh waste porcelain powder added was 16 kg.

[0051] Preparation Example 1.5

[0052] Unlike Preparation Example 1.2, in Preparation Example 1.5, the amount of 60-mesh waste porcelain powder added was 36 kg, and the amount of 100-mesh waste porcelain powder added was 12 kg.

[0053] Preparation Example 1.6

[0054] Unlike Preparation Example 1.4, in Preparation Example 1.6, the amount of 60-mesh calcined bauxite added was 8 kg, and the amount of 100-mesh calcined bauxite added was 4 kg.

[0055] Preparation Example 1.7

[0056] Unlike Preparation Example 1.4, in Preparation Example 1.7, the amount of 60-mesh calcined bauxite added was 9 kg, and the amount of 100-mesh calcined bauxite added was 3 kg.

[0057] Preparation Example 1.8

[0058] Unlike Preparation Example 1.1, in Preparation Example 1.8, the amount of 60-mesh waste porcelain powder added was 12 kg, and the amount of 100-mesh waste porcelain powder added was 36 kg.

[0059] Preparation Example 1.9

[0060] Unlike Preparation Example 1.1, in Preparation Example 1.9, the amount of 60-mesh calcined bauxite added was 3 kg, and the amount of 100-mesh calcined bauxite added was 9 kg.

[0061] Preparation Example 2: Modified Heavy Calcium Carbonate

[0062] A modified heavy calcium carbonate is prepared by the following steps:

[0063] 3960.4g of heavy calcium carbonate powder was stirred in a water bath at 60℃ and the speed was 600r / min. 39.6g of zinc stearate was added to the heavy calcium carbonate powder and mixed for 30min. The mixture was then cooled to obtain modified heavy calcium carbonate powder.

[0064] Preparation Example 2.2

[0065] Unlike Preparation Example 2.1, in Preparation Example 2.2 the water bath temperature was 70°C, the rotation speed was 700 r / min, and the mixing time was 50 min.

[0066] Preparation Example 2.3

[0067] Unlike Preparation Example 2.1, in Preparation Example 2.3 the water bath temperature was 80°C, the rotation speed was 800 r / min, and the mixing time was 70 min.

[0068] Preparation Example 2.4

[0069] Unlike Preparation Example 2.2, Preparation Example 2.4 contained 3940.9 g of heavy calcium carbonate and 59.1 g of zinc stearate.

[0070] Preparation Example 2.5

[0071] Unlike Preparation Example 2.4, Preparation Example 2.5 contained 3921.6 g of heavy calcium carbonate and 78.4 g of zinc stearate. Example

[0072] Example 1: No added heavy calcium carbonate

[0073] Example 1.1

[0074] A supplement for use in dried sanitary ceramic blanks is prepared by the following steps:

[0075] Add 5 kg of glaze slurry and 30 kg of raw material to 0.5 kg of 1% sodium carboxymethyl cellulose solution and mix well to obtain the slurry;

[0076] 60 kg of clinker powder from Preparation Example 1.1, 5 kg of 100-mesh silica powder and 6 kg of 200-mesh medium-temperature frit powder were added to the prepared slurry and mixed evenly to obtain a supplement for sanitary ceramic blanks.

[0077] Examples 1.2-1.3

[0078] Unlike Example 1.1, the raw material ratios in Examples 1.2-1.3 are different, as detailed in Table 1.

[0079] Table 1. Raw material ratios for Examples 1.1-1.3

[0080]

[0081] Example 1.4

[0082] Unlike Example 1.2, the sodium carboxymethyl cellulose solution in Example 1.4 has a mass fraction of 2%.

[0083] Examples 1.5-1.12

[0084] Unlike Example 1.4, in Examples 1.5-1.12, the clinker powder in Example 1.2 was replaced with an equal amount of clinker powder obtained from Preparation Examples 1.2-1.9.

[0085] Comparative Example 1

[0086] Unlike Example 1.1, no clinker powder was added in Comparative Example 1.

[0087] Comparative Example 2

[0088] Unlike Example 1.1, no glaze slurry and medium-temperature frit powder were added in Comparative Example 2.

[0089] Comparative Example 3

[0090] Unlike Example 1.1, no medium-temperature frit powder was added in Comparative Example 3.

[0091] Example 2: Addition of heavy calcium carbonate

[0092] Example 2.1

[0093] A supplement for use in dried sanitary ceramic blanks is prepared by the following steps:

[0094] 10 kg of glaze slurry and 20 kg of raw material are added to 0.8 kg of 2% sodium carboxymethyl cellulose solution and mixed evenly to obtain the slurry;

[0095] 50 kg of clinker powder from Preparation Example 1.6, 10 kg of 100-mesh silica powder, 3 kg of heavy calcium carbonate and 5 kg of 200-mesh medium-temperature frit powder were mixed to obtain dry powder.

[0096] The prepared dry powder is added to the prepared slurry and mixed evenly to obtain a supplement for sanitary ceramic blanks.

[0097] Example 2.2

[0098] Unlike Example 2.1, the amount of heavy calcium carbonate added in Example 2.2 is 4 kg.

[0099] Example 2.3

[0100] Unlike Example 2.1, the amount of heavy calcium carbonate added in Example 2.3 is 5 kg.

[0101] Example 3: Addition of modified heavy calcium carbonate

[0102] Examples 3.1-3.5

[0103] Unlike Example 2.2, in Examples 3.1-3.5, the heavy calcium carbonate in Example 2.2 was replaced with an equal amount of modified heavy calcium carbonate obtained from Preparation Examples 2.1-2.5.

[0104] The sanitary ceramic blanks prepared in Examples 1-3 and Comparative Examples 1-3 were respectively filled with a filler to fill dry blanks with crack-like defects of the same lesion size (lesion width < 8 mm, lesion depth < 8 mm, lesion length < 70 mm). After repair, the repaired dry blanks were fired at 1165℃. The following performance tests were conducted on the repaired dry blanks. The performance tests included whether the repaired area cracked and the firing shrinkage rate. The test data are shown in Table 2.

[0105] 1. Is the repaired area cracked?

[0106] Observe the repaired areas of the fired blanks to see if they crack.

[0107] 2. Firing shrinkage rate

[0108] The firing shrinkage rate of the repaired part of the dry blank was tested according to the industry standard QB / T 1548-2015 "Method for Determination of Linear Shrinkage Rate of Ceramic Blanks".

[0109] Table 2 Performance Test Data

[0110]

[0111] The following details this application with reference to the data provided in Table 2.

[0112] Combining Comparative Examples 1-3 and Examples 1-3, the results showed that the repaired areas of the sanitary ceramic blanks repaired using the repair agent prepared in Examples 1-3 of this application did not crack, and the firing shrinkage rate was lower than that of the sanitary ceramic blank repair agent prepared in Comparative Examples 1-5. This indicates that the sanitary ceramic blank repair agent of this application performs better in repairing cracks in the blanks and improving the yield of high-quality blanks.

[0113] Compared with Example 1.1, the effect of clinker powder was investigated in Comparative Example 1. The results showed that the sanitary ceramic blank prepared in Comparative Example 1 was worse than that of Example 1.1 in terms of whether the repaired part cracked and the firing shrinkage rate. This may be because no clinker powder was added in the Comparative Example, and the filler was completely fired during the second firing, resulting in volume shrinkage.

[0114] Using Example 1.1 as a control, the effects of glaze slurry and medium-temperature frit powder were investigated in Comparative Examples 2-3. The results showed that Comparative Example 2, which did not add glaze slurry and medium-temperature frit, produced sanitary ceramic blanks with poorer repair quality and firing shrinkage than Example 1.1. Comparative Example 3, which did not add medium-temperature frit powder, also produced sanitary ceramic blanks with poorer repair quality and firing shrinkage than Example 1.1. Furthermore, the sanitary ceramic blanks with poorer repair quality and firing shrinkage of Comparative Example 2 were also inferior to those of Comparative Example 3. This may be because both glaze slurry and medium-temperature frit powder are high-temperature binders in the binder. During the second firing, the glaze slurry and medium-temperature frit powder melt at high temperatures, thereby increasing the viscosity of the binder at high temperatures. Moreover, the viscosity of the medium-temperature frit powder at high temperatures is greater than that of the glaze slurry, which facilitates the binder's adhesion to the cracks in the blank, reducing the possibility of cracking or detachment at the repair site.

[0115] Examples 1.1-1.3 investigated the effect of raw material ratio. The results showed that the patch for sanitary ceramic blanks prepared in Example 1.2 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the raw material ratio selected in Example 1.2 is beneficial to improving the performance of the patch for sanitary ceramic blanks in terms of whether the repaired area cracked and the firing shrinkage rate.

[0116] Compared with Example 1.2, the effect of the mass fraction of sodium carboxymethyl cellulose solution was investigated in Example 1.4. The results showed that the patch for sanitary ceramic blanks prepared in Example 1.4 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the mass fraction of sodium carboxymethyl cellulose solution selected in Example 1.4 is beneficial to improving the performance of the patch for sanitary ceramic blanks in terms of whether the repaired area cracked and the firing shrinkage rate.

[0117] Compared with Example 1.4, Examples 1.5-1.6 investigated the effect of the ratio of waste porcelain powder and calcined bauxite in the clinker powder. The results showed that the patch for sanitary ceramic blanks prepared in Example 1.5 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the ratio of waste porcelain powder and calcined bauxite in the clinker powder selected in Example 1.5 is beneficial to improving the performance of the patch for sanitary ceramic blanks in terms of whether the repaired area cracked and the firing shrinkage rate.

[0118] Compared with Example 1.5, Examples 1.7-1.8 investigated the effect of the ratio of 60-mesh to 100-mesh powder particles in the waste porcelain powder. The results showed that the sanitary ceramic dry body filler prepared in Example 1.7 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the ratio of 60-mesh to 100-mesh powder particles in the waste porcelain powder selected in Example 1.7 is beneficial to improving the performance of the sanitary ceramic dry body filler in terms of whether the repaired area cracked and the firing shrinkage rate.

[0119] Compared with Example 1.7, Examples 1.9-1.10 investigated the effect of the ratio of 60-mesh to 100-mesh powder particles in calcined bauxite. The results showed that the patch for sanitary ceramic blanks prepared in Example 1.9 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the ratio of 60-mesh to 100-mesh powder particles in calcined bauxite selected in Example 1.9 is beneficial to improving the performance of the patch for sanitary ceramic blanks in terms of whether the repaired area cracked and the firing shrinkage rate.

[0120] Compared with Example 1.4, in Example 1.11, the waste porcelain powder contained an excessive amount of 100-mesh powder particles. The resulting sanitary ceramic dry body filler was inferior to that of Example 1.4 in terms of whether the repaired area cracked and the firing shrinkage rate. In Example 1.12, the calcined bauxite contained an excessive amount of 100-mesh powder particles. The resulting sanitary ceramic dry body filler was inferior to that of Example 1.4 in terms of whether the repaired area cracked and the firing shrinkage rate. This may be because there are fewer large particles in the waste porcelain powder and calcined bauxite, making it difficult to form a stable particle size distribution with other particles in the prepared filler. This reduces the density of the powder particles in the filler and makes it difficult to prevent the firing shrinkage of the filler.

[0121] Compared with Example 1.9, the effect of adding heavy calcium carbonate to the raw materials was investigated in Examples 2.1-2.3. The results showed that the sanitary ceramic dry body filler prepared in Examples 2.1-2.3 was better than that of Example 1.9 in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that adding heavy calcium carbonate to the raw materials is beneficial to improving the performance of the sanitary ceramic dry body filler in terms of whether the repaired area cracked and the firing shrinkage rate.

[0122] Examples 2.1-2.3 investigated the effect of the amount of heavy calcium carbonate added to the raw materials. The results showed that the sanitary ceramic dry body filler prepared in Example 2.2 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the amount of heavy calcium carbonate added in Example 2.2 is beneficial to improving the performance of the sanitary ceramic dry body filler in terms of whether the repaired area cracked and the firing shrinkage rate.

[0123] Compared with Example 2.2, the effect of modified heavy calcium carbonate was investigated in Examples 3.1-3.5. The results showed that the sanitary ceramic dry body filler prepared in Examples 3.1-3.5 was better than that in Example 2.2 in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that adding modified heavy calcium carbonate to the raw materials is beneficial to improving the performance of the sanitary ceramic dry body filler in terms of whether the repaired area cracked and the firing shrinkage rate.

[0124] Examples 3.1-3.3 investigated the influence of the modified heavy calcium carbonate preparation process. The results showed that the sanitary ceramic blank filler prepared in Example 3.2 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the water bath temperature, rotation speed and mixing time selected in Example 3.2 for preparing modified heavy calcium carbonate are beneficial to improving the performance of the sanitary ceramic blank filler in terms of whether the repaired area cracked and the firing shrinkage rate.

[0125] Compared with Example 3.2, the influence of the ratio of modified heavy calcium carbonate raw materials was investigated in Examples 3.4-3.5. The results showed that the patch for sanitary ceramic blanks prepared in Example 3.4 performed better in terms of whether the repaired area cracked and the firing shrinkage rate. This indicates that the ratio of zinc stearate and heavy calcium carbonate in the modified heavy calcium carbonate selected in Example 3.4 is beneficial to improving the performance of the patch for sanitary ceramic blanks in terms of whether the repaired area cracked and the firing shrinkage rate.

[0126] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A supplement for use in dry sanitary ceramic blanks, characterized in that, Including the following parts by weight of raw materials: 40-60 parts of clinker powder, 5-15 parts of silica powder, 10-30 parts of blank, 5-15 parts of glaze slurry, 0.5-1 parts of sodium carboxymethyl cellulose solution with a mass fraction of 1-2%, 4-6 parts of medium-temperature frit powder, and 3-5 parts of heavy calcium carbonate powder. The silicon micro powder has a particle size of 100±10 mesh, and the medium-temperature frit powder has a particle size of 200±10 mesh; the clinker powder is prepared by mixing waste porcelain powder and calcined bauxite in a weight ratio of (6-10):

2. The heavy calcium carbonate powder is a modified heavy calcium carbonate powder, which is prepared by zinc stearate and heavy calcium carbonate in a weight ratio of (1-2):

100. The modified heavy calcium carbonate powder is prepared by the following steps: Heavy calcium carbonate powder is stirred in a water bath at 60-80℃ at a speed of 600-800 r / min. Zinc stearate is added to the heavy calcium carbonate powder by weight and mixed for 30-70 min. After cooling, modified heavy calcium carbonate powder is obtained.

2. The additive for sanitary ceramic blanks according to claim 1, characterized in that: The waste porcelain powder is prepared by mixing 60±10 mesh waste porcelain powder and 100±10 mesh waste porcelain powder in a weight ratio of (1-3):1, and the calcined bauxite is prepared by mixing 60±10 mesh calcined bauxite and 100±10 mesh calcined bauxite in a weight ratio of (1-3):

1.

3. A method for preparing a supplement for sanitary ceramic blanks according to any one of claims 1-2, characterized in that, Includes the following steps: The glaze slurry and the blank are added to the sodium carboxymethyl cellulose solution according to the weight ratio and mixed evenly to obtain the slurry; The clinker powder, silica powder, heavy calcium carbonate and medium-temperature frit powder are mixed in parts by weight to obtain dry powder. The prepared dry powder is added to the prepared slurry and mixed evenly to obtain a supplement for sanitary ceramic blanks.

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