阅读说明：本技术 一种抗腐蚀釉面砖及其制备方法 (Anti-corrosion glazed tile and preparation method thereof ) 是由 祁国亮 郑显英 周燕 于 2020-07-08 设计创作，主要内容包括：本发明公开了一种抗腐蚀釉面砖及其制备方法,抗腐蚀釉面砖包括抗腐蚀釉层、陶瓷砖坯体和面釉层,抗腐蚀釉层位于陶瓷砖坯体的底面和/或侧面,面釉层位于陶瓷砖坯体的上表面；抗腐蚀釉层的吸水率小于陶瓷砖坯体的吸水率,抗腐蚀釉层的原料包括熔剂型原料和石英料原料,其中,熔剂型原料包括瓷石、硅灰石、滑石和萤石,石英料原料包括石英和锆英砂。本技术方案提出的一种抗腐蚀釉面砖,其砖体表面布施有抗腐蚀釉,有利于提高陶瓷砖的抗渗能力,从而有效阻挡外界腐蚀介质的侵入,起到抗腐蚀作用。进而提出一种上述抗腐蚀釉面砖的制备方法,有利于防止抗腐蚀釉的脱落,确保陶质釉面砖成品的色相一致和抗腐蚀效果的提升,且工艺简单,操作性强。(The invention discloses an anti-corrosion glazed tile and a preparation method thereof, wherein the anti-corrosion glazed tile comprises an anti-corrosion glaze layer, a ceramic tile body and a surface glaze layer, wherein the anti-corrosion glaze layer is positioned on the bottom surface and/or the side surface of the ceramic tile body, and the surface glaze layer is positioned on the upper surface of the ceramic tile body; the water absorption of the corrosion-resistant glaze layer is less than that of the ceramic tile green body, the raw materials of the corrosion-resistant glaze layer comprise flux type raw materials and quartz raw materials, wherein the flux type raw materials comprise porcelain stone, wollastonite, talc and fluorite, and the quartz raw materials comprise quartz and zircon sand. According to the technical scheme, the corrosion-resistant glaze tiles are distributed on the surfaces of the tile bodies, so that the anti-permeability capability of the tiles is improved, the invasion of external corrosive media is effectively blocked, and the corrosion-resistant effect is achieved. Further, the preparation method of the corrosion-resistant glazed tile is beneficial to preventing the corrosion-resistant glaze from falling off, ensures consistent hue of the finished ceramic glazed tile and improvement of corrosion resistance, and has simple process and strong operability.)

1. An anticorrosive glazed tile which is characterized in that: the ceramic tile comprises a corrosion-resistant glaze layer, a ceramic tile body and a surface glaze layer, wherein the corrosion-resistant glaze layer is positioned on the bottom surface and/or the side surface of the ceramic tile body, and the surface glaze layer is positioned on the upper surface of the ceramic tile body;

the water absorption of the anti-corrosion glaze layer is less than that of the ceramic tile green body, the raw materials of the anti-corrosion glaze layer comprise flux type raw materials and quartz raw materials, wherein the flux type raw materials comprise porcelain stone, wollastonite, talc and fluorite, and the quartz raw materials comprise quartz and zircon sand.

2. A corrosion resistant glazed tile according to claim 1, wherein: the ceramic tile green body is any one of a ceramic tile green body or a ceramic tile green body.

3. A corrosion resistant glazed tile according to claim 2, wherein: the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer comprises the following raw material components in parts by weight: 8-16 parts of porcelain stone, 15-25 parts of quartz, 3-9 parts of zircon sand, 20-30 parts of wollastonite, 2-4 parts of zinc oxide, 0-5 parts of talc, 0-5 parts of fluorite, 4-10 parts of kaolin and 15-25 parts of borax.

4. A corrosion resistant glazed tile according to claim 3, wherein: the water absorption rate of the anti-corrosion glaze layer is 3-6%.

5. A corrosion resistant glazed tile according to claim 2, wherein: the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer comprises the following raw material components in parts by weight: 35-45 parts of porcelain stone, 8-12 parts of quartz, 8-15 parts of zircon sand, 13-19 parts of wollastonite, 5-10 parts of zinc oxide, 2-6 parts of talc, 4-8 parts of fluorite and 5-10 parts of kaolin.

6. A corrosion-resistant glazed tile according to claim 5, wherein: the water absorption rate of the corrosion-resistant glaze layer is less than 0.2%.

7. A preparation method of an anti-corrosion glazed tile is characterized by comprising the following steps: the corrosion-resistant glazed tile of any one of claims 1 to 6, wherein the preparation method comprises the following steps:

A. adding the raw materials of the corrosion-resistant glaze into a ball mill according to the proportion to prepare the corrosion-resistant glaze;

B. adding the overglaze raw materials into a ball mill according to the proportion, mixing sodium carboxymethylcellulose, sodium tripolyphosphate and water into the ball mill, and carrying out ball milling to obtain overglaze; the binding power of the corrosion-resistant glaze is more than or equal to 0.1 MPa;

C. b, applying the overglaze cloth in the step B on the upper surface of the ceramic tile blank to form an overglaze layer;

D. b, applying the corrosion-resistant glaze cloth in the step A to the bottom surface and/or the side surface of the ceramic tile blank in the step C to form a corrosion-resistant glaze layer, wherein the difference between the melting temperature of the corrosion-resistant glaze and the melting temperature of the ceramic tile blank is less than or equal to 1 ℃, and the difference between the expansion coefficient of the corrosion-resistant glaze and the expansion coefficient of the ceramic tile blank is less than or equal to 1;

E. and D, drying and firing the ceramic tile blank body obtained in the step D to form the corrosion-resistant glazed tile.

8. The method of claim 7, wherein the glazed tile further comprises: the step D also comprises the following steps:

d0, adjusting the specific gravity of the anti-corrosion glaze in the step A, so that the specific gravity of the anti-corrosion glaze for spraying is 1.35-1.40, the specific gravity of the anti-corrosion glaze for roller coating is 1.60-1.80, and the specific gravity of the anti-corrosion glaze for brush coating is 1.64-1.82;

d1, applying the corrosion-resistant glaze of the step A to the bottom surface of the ceramic tile blank of the step C in a glaze applying mode of spraying or roll coating to form a bottom surface corrosion-resistant glaze layer;

d2, the corrosion-resistant glaze in the step A is applied to the side surface of the ceramic tile blank in the step D1 in a brushing glazing mode to form a side surface corrosion-resistant glaze layer.

9. The method of claim 7, wherein the glazed tile further comprises: in the step A, the corrosion-resistant glaze is sieved by a 325-mesh sieve, and the residue on the sieve is 0.5-0.8%.

Technical Field

The invention relates to the technical field of architectural ceramics, in particular to an anti-corrosion glazed tile and a preparation method thereof.

Background

Because the glazed tile production process is to sinter the body layer after glazing, because the glazed layer bears the decorative effect and usually uses better raw material production, manufacturers in order to reduce the cost, the body layer mostly selects cheap raw materials, because of the difference of the quality of the raw materials of the glazed layer and the body layer, the hue of the bottom and the face of the finished product of the body is different, commonly called as 'two layers of skins', especially the difference of whiteness and oxidation degree is obvious, so that the hue of the bottom surface of the finished product of the ceramic tile is different from the hue of the side surface and the top surface of the finished product of the ceramic tile.

The corrosion of ceramic tiles is classified into chemical or physical corrosion according to the corrosion mechanism, and the corrosion types of the ceramic tiles mainly include chemical corrosion, expansion corrosion, physical aging, chemical aging, swelling and the like. Because the ceramic tile water absorption rate is big, the body structure has porousness, and the microcrack is many, and in addition coarse bottom surface, the ceramic tile just provides the passageway for carbon dioxide in the external environment, oxygen and water etc. for the inside chemical reaction of ceramic tile can take place, and the ceramic tile is in people's daily use, along with spreading more and more long of time, can take place the inflation along with the emergence ceramic tile of reaction in the ceramic tile, leads to the glaze fracture then, influences people and uses. Therefore, how to improve the anti-permeability of the ceramic tile, how to effectively block the invasion of external corrosive media, how to prevent the cracking of the ceramic tile glaze, and how to improve the service time and the service range of the ceramic tile finished product are problems to be solved urgently.

Disclosure of Invention

The invention aims to provide an anti-corrosion glazed tile, wherein anti-corrosion glaze is distributed on the surface of a tile body, so that the anti-permeability capability of the tile is improved, the invasion of external corrosive media is effectively prevented, and an anti-corrosion effect is achieved.

The invention also aims to provide a preparation method of the anti-corrosion glazed tile, which is beneficial to preventing the anti-corrosion glaze from falling off, ensures consistent hue of the finished ceramic glazed tile and improvement of anti-corrosion effect, and has simple process and strong operability.

In order to achieve the purpose, the invention adopts the following technical scheme:

an anti-corrosion glazed tile comprises an anti-corrosion glaze layer, a ceramic tile body and a surface glaze layer, wherein the anti-corrosion glaze layer is positioned on the bottom surface and/or the side surface of the ceramic tile body, and the surface glaze layer is positioned on the upper surface of the ceramic tile body;

the water absorption of the anti-corrosion glaze layer is less than that of the ceramic tile green body, the raw materials of the anti-corrosion glaze layer comprise flux type raw materials and quartz raw materials, wherein the flux type raw materials comprise porcelain stone, wollastonite, talc and fluorite, and the quartz raw materials comprise quartz and zircon sand.

Preferably, the ceramic tile body is any one of a ceramic tile body and a ceramic tile body.

Preferably, the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer comprises the following raw material components in parts by weight: 8-16 parts of porcelain stone, 15-25 parts of quartz, 3-9 parts of zircon sand, 20-30 parts of wollastonite, 2-4 parts of zinc oxide, 0-5 parts of talc, 0-5 parts of fluorite, 4-10 parts of kaolin and 15-25 parts of borax.

Preferably, the water absorption rate of the anti-corrosion glaze layer is 3-6%.

Preferably, the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer comprises the following raw material components in parts by weight: 35-45 parts of porcelain stone, 8-12 parts of quartz, 8-15 parts of zircon sand, 13-19 parts of wollastonite, 5-10 parts of zinc oxide, 2-6 parts of talc, 4-8 parts of fluorite and 5-10 parts of kaolin.

Preferably, the water absorption rate of the corrosion-resistant glaze layer is less than 0.2%.

A preparation method of an anti-corrosion glazed tile comprises the following steps:

A. adding the raw materials of the corrosion-resistant glaze into a ball mill according to the proportion to prepare the corrosion-resistant glaze;

B. adding the overglaze raw materials into a ball mill according to the proportion, mixing sodium carboxymethylcellulose, sodium tripolyphosphate and water into the ball mill, and carrying out ball milling to obtain overglaze; the binding power of the corrosion-resistant glaze is more than or equal to 0.1 MPa;

C. b, applying the overglaze cloth in the step B on the upper surface of the ceramic tile blank to form an overglaze layer;

D. b, applying the corrosion-resistant glaze cloth in the step A to the bottom surface and/or the side surface of the ceramic tile blank in the step C to form a corrosion-resistant glaze layer, wherein the difference between the melting temperature of the corrosion-resistant glaze and the melting temperature of the ceramic tile blank is less than or equal to 1 ℃, and the difference between the expansion coefficient of the corrosion-resistant glaze and the expansion coefficient of the ceramic tile blank is less than or equal to 1;

E. and D, drying and firing the ceramic tile blank body obtained in the step D to form the corrosion-resistant glazed tile.

Preferably, step D further comprises the following steps:

d0, adjusting the specific gravity of the anti-corrosion glaze in the step A, so that the specific gravity of the anti-corrosion glaze for spraying is 1.35-1.40, the specific gravity of the anti-corrosion glaze for roller coating is 1.60-1.80, and the specific gravity of the anti-corrosion glaze for brush coating is 1.64-1.82;

d1, applying the corrosion-resistant glaze of the step A to the bottom surface of the ceramic tile blank of the step C in a glaze applying mode of spraying or roll coating to form a bottom surface corrosion-resistant glaze layer;

d2, the corrosion-resistant glaze in the step A is applied to the side surface of the ceramic tile blank in the step D1 in a brushing glazing mode to form a side surface corrosion-resistant glaze layer.

Preferably, in the step A, the corrosion-resistant glaze is sieved by a 325-mesh sieve, and the screen residue is 0.5-0.8%.

The invention has the beneficial effects that: according to the technical scheme, the corrosion-resistant glaze tiles are distributed on the surfaces of the tile bodies, so that the anti-permeability capability of the tiles is improved, the invasion of external corrosive media is effectively blocked, and the corrosion-resistant effect is achieved. Further, the preparation method of the corrosion-resistant glazed tile is beneficial to preventing the corrosion-resistant glaze from falling off, ensures consistent hue of the finished ceramic glazed tile and improvement of corrosion resistance, and has simple process and strong operability.

Drawings

The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.

FIG. 1 is a partial cross-sectional view of a corrosion-resistant glazed tile of the present invention.

Wherein: the ceramic tile comprises an anti-corrosion glaze layer 1, a bottom anti-corrosion glaze layer 11, a side anti-corrosion glaze layer 12, a ceramic tile body 2, a surface glaze layer 3, a bottom glaze layer 4, a decorative layer 5 and a back bottom slurry layer 6.

Detailed Description

An anti-corrosion glazed tile comprises an anti-corrosion glaze layer 1, a ceramic tile body 2 and a surface glaze layer 3, wherein the anti-corrosion glaze layer is positioned on the bottom surface and/or the side surface of the ceramic tile body, and the surface glaze layer is positioned on the upper surface of the ceramic tile body;

the water absorption of the corrosion-resistant glaze layer 1 is less than that of the ceramic tile green body, the raw materials of the corrosion-resistant glaze layer 1 comprise flux type raw materials and quartz raw materials, wherein the flux type raw materials comprise porcelain stone, wollastonite, talc and fluorite, and the quartz raw materials comprise quartz and zircon sand.

In order to solve the problem of inconsistent surface color of the glazed tile, the technical scheme is that an anti-corrosion glaze layer 1 is distributed on the bottom surface of a ceramic tile blank 2, and the luster transparency and the texture of the anti-corrosion glaze layer 1 can be mutually supported with a glaze layer 3 in the glazed tile and naturally fused in the same glazed tile product.

Specifically, according to the technical scheme, the layer of corrosion-resistant glaze is distributed on the bottom surface and/or the side surface of the blank body, namely, a piece of corrosion-resistant glaze clothes is worn on the bottom of the blank body, the bottom of a lattice of the blank body is filled with the corrosion-resistant glaze, the bottom of the lattice is filled with the corrosion-resistant glaze with high density, a corrosion medium is blocked from entering a channel of the tile body, and the corrosion-resistant effect of the ceramic glazed tile can be effectively improved.

Specifically, in the technical scheme, the water absorption rate of the corrosion-resistant glaze layer 1 of the glazed tile is less than that of the ceramic tile green body, the sintering degree refers to the sintering temperature, and refers to the temperature at which the ceramic green body is sintered to achieve the minimum air hole, the maximum shrinkage, the most compact product and the best performance and become a solid aggregate state. The water absorption rate of the ceramic tile can be used for representing the sintering degree of the ceramic tile, and in order to ensure that the anti-corrosion glaze layer 1 in the glazed tile and the ceramic tile green body 2 can be further mutually baked and naturally fused in the same product, the technical scheme also further limits the water absorption rate of the glazed tile, so that the sintering degree and the density of the anti-corrosion glaze are far better than those of the ceramic tile green body, thereby blocking a corrosion medium from entering a channel of the tile body and enabling the tile body to obtain an anti-corrosion effect.

In the technical scheme, the corrosion-resistant glaze layer 1 for improving the corrosion-resistant effect of the glazed tile comprises a flux type raw material and a quartz material raw material, wherein the flux type raw material comprises porcelain stone, wollastonite, talc and fluorite, and the quartz material raw material comprises quartz and zircon sand.

The flux type raw material is beneficial to controlling the sintering temperature of the corrosion-resistant glaze, ensuring that the corrosion-resistant glaze has a proper sintering range, avoiding pinholes and gaps on the glaze surface of the corrosion-resistant glaze layer after sintering, being beneficial to preventing external corrosive media from entering the green body from the pinholes or the gaps, and ensuring that the brick body obtains a better corrosion-resistant effect.

Silica readily forms various silicates with alkaline substances, which have the property of resisting the attack of various gases, water and most alkalis and acids, and the addition of quartz material in the anti-corrosion glaze increases the attack capacity of the anti-corrosion glaze on water and chemical substances.

In other embodiments of the present disclosure, the ceramic glazed tile further comprises a ground coat layer 4 and a decorative layer 5. The ground glaze layer 4 is positioned between the ceramic tile body 2 and the surface glaze layer 3, and the ground glaze layer 4 is beneficial to covering the body color of the ceramic tile body 2 and improving the binding property between the ceramic tile body 2 and the surface glaze layer 3; the decoration layer 5 is positioned on the upper surface of the overglaze layer 3 and plays a role of decoration.

Further, the ceramic tile green body is any one of a ceramic tile green body and a ceramic tile green body.

Because the ceramic tile has high water absorption rate, the blank structure of the ceramic tile has porosity and a plurality of micro cracks, and the rough bottom surface provides channels for carbon dioxide, oxygen, water and the like in the external environment, so that the chemical reaction in the ceramic tile can occur. The technical scheme of the invention can be applied to two ceramic tiles with different water absorption rates, and is beneficial to improving the anti-permeability capability of the ceramic tiles, thereby effectively blocking the invasion of external corrosive media and playing a role in corrosion resistance.

Further, the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer 1 comprises the following raw material components in parts by weight: 8-16 parts of porcelain stone, 15-25 parts of quartz, 3-9 parts of zircon sand, 20-30 parts of wollastonite, 2-4 parts of zinc oxide, 0-5 parts of talc, 0-5 parts of fluorite, 4-10 parts of kaolin and 15-25 parts of borax.

When the ceramic tile green body is a ceramic tile green body, the corrosion-resistant glaze layer 1 comprises porcelain stone, quartz, zircon sand, wollastonite, zinc oxide, talc, fluorite, kaolin and borax.

If the amount of flux raw materials in the formula is large, the sintering temperature of the corrosion-resistant glaze is low, the sintering range is narrow, pinholes are easy to appear on the glaze surface, the pinholes provide channels for external corrosive media to enter a blank body, and the corrosion resistance effect is poor. If the flux raw materials in the formula are less, the sintering temperature of the corrosion-resistant glaze is higher, the density of the corrosion-resistant glaze is poor, the void ratio in the glaze is higher, the water absorption of the corrosion-resistant glaze is higher, a channel is provided for external corrosive media to enter a green body, and the corrosion-resistant effect is poor.

If the quartz material in the corrosion-resistant glaze is excessively used, the corrosion resistance of the corrosion-resistant glaze to water and chemical substances is increased, but the melting point of the glaze is also increased, so that the glaze is difficult to melt. If the consumption of the quartz material in the corrosion-resistant glaze is too small, the corrosion resistance of the corrosion-resistant glaze to water and chemical substances is weakened, but the glaze melting point is also reduced, so that the glaze is easy to melt.

The zinc oxide has a fluxing function, can improve the luster of the glaze and help the glaze to be opaque, and when the content of the zinc oxide is too high, the glaze is more refractory, and the melt is high in viscosity. Kaolin is an indispensable component in the glaze, and is added into the glaze, so that the suspension property and the adhesive force of the glaze are favorably met. Borax can form a low-melting-point mixture with silicate, the melting temperature of glaze is reduced, and high-viscosity glass is formed. Fluorite is beneficial to adjusting the thickness of glaze and the melting temperature.

Furthermore, the water absorption rate of the anti-corrosion glaze layer 1 is 3-6%.

The anti-corrosion glaze of the invention covers the bottom and the side of the ceramic tile green body with the fully sintered anti-corrosion glaze, so that the channel of a corrosive medium entering the tile body is blocked, and the tile body obtains an anti-corrosion effect. Therefore, the anti-corrosion glaze in the technical scheme needs to be suitable for different ceramic tiles, and the sintering degree and the density of the anti-corrosion glaze are far better than those of a ceramic tile green body.

Further, the ceramic tile green body is a ceramic tile green body;

the anti-corrosion glaze layer 1 comprises the following raw material components in parts by weight: 35-45 parts of porcelain stone, 8-12 parts of quartz, 8-15 parts of zircon sand, 13-19 parts of wollastonite, 5-10 parts of zinc oxide, 2-6 parts of talc, 4-8 parts of fluorite and 5-10 parts of kaolin.

When the ceramic tile body is a porcelain tile body, the corrosion-resistant glaze layer 1 comprises porcelain stone, quartz, zircon sand, wollastonite, zinc oxide, talc, fluorite and kaolin.

Further, the water absorption of the corrosion-resistant glaze layer 1 is less than 0.2%.

The anti-corrosion glaze of the invention covers the bottom and the side of the ceramic tile green body with the fully sintered anti-corrosion glaze, so that the channel of a corrosive medium entering the tile body is blocked, and the tile body obtains an anti-corrosion effect. Therefore, the anti-corrosion glaze in the technical scheme needs to be suitable for different ceramic tiles, and the sintering degree and the density of the anti-corrosion glaze are far better than those of the ceramic tile green body.

Further, the corrosion-resistant glaze layer 1 is divided into a bottom surface corrosion-resistant glaze layer 11 and a side surface corrosion-resistant glaze layer 12, wherein the bottom surface corrosion-resistant glaze layer 11 is positioned on the bottom surface of the ceramic tile body 2, and the side surface corrosion-resistant glaze layer 12 is positioned on the side surface of the ceramic tile body 2.

Furthermore, the anti-corrosion glaze layer 1 of the technical scheme is divided into a bottom anti-corrosion glaze layer 11 and a side anti-corrosion glaze layer 12, the bottom anti-corrosion glaze layer 11 is positioned on the bottom surface of the ceramic tile body 2, and the side anti-corrosion glaze layer 12 is positioned on the side surface of the ceramic tile body 2, so that each surface of the glazed tile is consistent in hue, and the appearance effect of the glazed tile is further improved.

Preferably, the thickness of the bottom surface anti-corrosion glaze layer 11 is 0.1-0.3 mm. According to the technical scheme, the thickness of the bottom surface corrosion-resistant glaze layer 11 is limited to be 0.1-0.3 mm, when the bottom surface corrosion-resistant glaze layer 11 is too thin, geometric shading at the bottom of the ceramic tile body 2 cannot be completely filled, the protection capability of the ceramic tile body 2 is easily reduced, and the corrosion-resistant effect of the glazed tile is not favorably improved; when the bottom surface corrosion-resistant glaze layer 11 is too thick, the normal paving of the ceramic tile is easily affected, and the attractiveness of the paving of the ceramic tile is not ensured.

Preferably, the thickness of the side anti-corrosion glaze layer 12 is 0.02-0.05 mm. According to the technical scheme, the thickness of the side anti-corrosion glaze layer 12 is limited to be 0.02-0.05 mm, when the side anti-corrosion glaze layer 12 is too thin, the side anti-corrosion glaze layer 12 cannot completely cover the color phase of the side of the ceramic tile blank 2, so that the difference between the performance indexes of the side of the ceramic tile blank 2, such as whiteness, glossiness, transmittance and the like, and the performance indexes of the glaze layer 3, such as whiteness, glossiness, transmittance and the like, is not easy to overcome, the consistency of the color phase of finished glazed tiles is not ensured, meanwhile, the protection capability of the side anti-corrosion glaze layer 12 on the ceramic tile blank 2 is also reduced, and the anti-corrosion effect of the glazed tiles is not; when the side anti-corrosion glaze layer 12 is too thick, the normal paving of the ceramic tile is easily affected, and the attractiveness of the paving of the ceramic tile is not ensured.

A preparation method of an anti-corrosion glazed tile comprises the following steps:

A. adding the raw materials of the corrosion-resistant glaze into a ball mill according to the proportion to prepare the corrosion-resistant glaze;

B. adding the overglaze raw materials into a ball mill according to the proportion, mixing sodium carboxymethylcellulose, sodium tripolyphosphate and water into the ball mill, and carrying out ball milling to obtain overglaze; the binding power of the corrosion-resistant glaze is more than or equal to 0.1 MPa;

C. b, applying the overglaze cloth in the step B on the upper surface of the ceramic tile blank to form an overglaze layer 3;

D. b, applying the corrosion-resistant glaze cloth in the step A to the bottom surface and/or the side surface of the ceramic tile blank in the step C to form a corrosion-resistant glaze layer 1, wherein the difference between the melting temperature of the corrosion-resistant glaze and the melting temperature of the ceramic tile blank is less than or equal to 1 ℃, and the difference between the expansion coefficient of the corrosion-resistant glaze and the expansion coefficient of the ceramic tile blank is less than or equal to 1;

E. and D, drying and firing the ceramic tile blank body obtained in the step D to form the corrosion-resistant glazed tile.

Furthermore, the technical scheme also provides a preparation method of the corrosion-resistant ceramic glazed tile, wherein the bonding force of the corrosion-resistant glaze is controlled to be more than or equal to 0.1MPa, so that the corrosion-resistant glaze is favorably prevented from falling off from the bottom or the side wall of a ceramic tile blank, the color phase consistency of a finished ceramic tile product is ensured, the deformation degree of the finished ceramic tile product is reduced, and the preparation method is simple in process and strong in operability.

In the prior art, the melting temperature of the overglaze of the glazed tile is generally 50-130 ℃ lower than that of the blank body, so that the overglaze is covered on the surface of the blank body in a molten glass shape under the action of high temperature and is smoothly spread to form an overglaze layer. When firing, if the overglaze is applied to the bottom of the blank, the overglaze is likely to fall off from the bottom of the blank during firing due to the large difference between the melting temperatures of the overglaze and the blank.

Therefore, in order to ensure that the corrosion-resistant glaze distributed at the bottom of the glazed tile is not easy to fall off in the firing process and simultaneously prevent the green tile from deforming, the technical scheme limits the melting temperature and the expansion coefficient of the corrosion-resistant glaze, wherein the difference between the melting temperature of the corrosion-resistant glaze and the melting temperature of the ceramic green tile is less than 1 ℃, and the difference between the expansion coefficient of the corrosion-resistant glaze and the expansion coefficient of the ceramic green tile is less than 1. It should be noted that the melting temperature of the corrosion-resistant glaze refers to the highest melting temperature of the corrosion-resistant glaze, the melting temperature of the ceramic green brick refers to the highest temperature of the kiln when the ceramic tile is fired, and the expansion coefficient refers to the expansion coefficient from room temperature to 400 ℃ or from room temperature to 600 ℃.

It should be noted that the ceramic tile body and the overglaze can be made by the existing formula.

More specifically, the specific steps of step a may include any one of the following two types:

(1) a, adding the raw materials of the corrosion-resistant glaze into a ball mill according to a ratio, mixing sodium carboxymethylcellulose, sodium tripolyphosphate and water into the ball mill, and carrying out ball milling to obtain the corrosion-resistant glaze;

wherein the adding proportion of the corrosion-resistant glaze raw material, the grinding balls and the water is 1:2 (1-0.8) by mass ratio. Taking 1 part by weight of the anti-corrosion glaze raw material, the addition amount of the sodium carboxymethyl cellulose is 0.15-0.25 part by weight, and the addition amount of the sodium tripolyphosphate is 0.2-0.35 part by weight.

(2) A, weighing the anti-corrosion glaze raw materials according to the proportion to form a mixture, and then adding the mixture into a ball mill for dry ball milling; finally, mixing and stirring the mixture and the organic flux according to the proportion to form the anti-corrosion glaze; when the organic flux is used for preparing the anti-corrosion glaze, the organic flux can provide better adhesion and prevent the anti-corrosion glaze from falling off before the ceramic tile enters a kiln for firing.

In one embodiment of the technical scheme, the organic flux comprises ethylene glycol, glycerol, polyether polyol, acrylic acid and acrylamide, and the addition ratio of the mixture, the ethylene glycol, the glycerol, the polyether polyol, the acrylic acid and the acrylamide is (7-30): (40-50): (20-30): (15-25): (5-10): (5-10).

More specifically, step D further includes the following steps:

d0, adjusting the specific gravity of the anti-corrosion glaze in the step A, so that the specific gravity of the anti-corrosion glaze for spraying is 1.35-1.40, the specific gravity of the anti-corrosion glaze for roller coating is 1.60-1.80, and the specific gravity of the anti-corrosion glaze for brush coating is 1.64-1.82;

d1, applying the corrosion-resistant glaze of the step A to the bottom surface of the ceramic tile blank of the step C in a glaze applying mode of spraying or roll coating to form a bottom surface corrosion-resistant glaze layer 11;

d2, the corrosion-resistant glaze in the step A is coated on the side surface of the ceramic tile blank in the step D1 by a brushing coating way to form a side surface corrosion-resistant glaze layer 12.

The specific gravity of the anti-corrosion glaze is adjusted according to different glazing modes, so that the effectiveness of the anti-corrosion glaze glazing is ensured, and the anti-corrosion glaze is ensured to protect the green bricks.

The spraying glazing is to spray glaze slurry into mist with compressed air and blow the mist onto green brick, so that the glaze is adhered to the green brick. The spraying glazing requires the glaze slip to have large water content and small concentration, so the specific gravity is between 1.35 and 1.40. The spraying specific gravity is more than 1.40, the spray gun is easy to block by the glaze slurry, the spraying specific gravity is less than 1.35, and the quantity of the glaze slurry sprayed to the green brick is too small and too thin.

The roller coating glazing is that a cylindrical rubber roller is arranged above a glaze groove, the glaze groove is filled with corrosion-resistant glaze slip, the glaze groove is relatively vertical to a glazing line, the glaze groove is arranged below the glazing line, when a brick blank moves forwards on the glazing line, the rubber roller on the glaze groove starts to rotate, and the corrosion-resistant glaze slip adhered to the rubber roller is distributed at the bottom of the brick blank along with the rotation of the rubber roller and the forward movement of the brick blank.

When the anti-corrosion glaze is coated on the rubber roller, the specific gravity is less than 1.60, the glaze slip concentration is low, the adhesion force of the glaze slip and the rubber roller is low, the glaze slip adhered on the rubber roller is less, the anti-corrosion glaze coated on the green brick is less, the thickness is thinner, and the bottom of the green brick cannot be well filled. When the anti-corrosion glaze is coated on the rubber roller, the specific gravity is more than 1.80, the glaze slip concentration is high, the adhesion force of the glaze slip and the rubber roller is high, the glaze slip adhered on the rubber roller is large, the anti-corrosion glaze coated on the green brick is large, the thickness is thicker, and the bottom glaze of the green brick is too much.

Because the glazing part is positioned on the side surface of the blank body, the glazing mode of brushing the side surface of the blank body is mostly manual glazing, and the specific gravity of the anti-corrosion glaze for brushing is limited to 1.64-1.82 in the technical scheme. When the specific gravity of the anti-corrosion glaze is less than 1.64, the glaze slip has large water content, the side surface water absorption area of the blank body is small, the surface drying rate is slow after glazing, and the glaze is not suitable for subsequent working procedure operation; when the specific gravity of the anti-corrosion glaze is more than 1.82, the concentration of the glaze slip is high, the continuous brushing operation of the side surface of the blank body is inconvenient, and the brushing of the glaze layer on the side surface is not uniform.

The anti-corrosion glaze layer on the bottom surface is applied by spraying or roller coating, so that the anti-corrosion glaze layer with a certain thickness is formed at the bottom of the green brick, and the function of the anti-corrosion glaze layer can be effectively realized.

The anti-corrosion glaze layer on the side surface is applied in a brushing glazing mode, so that the anti-corrosion glaze layer with a thin wall is formed on the side part of the green brick, the function of the anti-corrosion glaze layer is realized, and the influence of the anti-corrosion glaze layer on the side surface on the paving of the glazed brick is effectively avoided.

Further, in an embodiment of the present technical solution, the glazed tile glazing sequence is:

firstly, coating surface glaze on the upper surface of a ceramic tile blank;

then spraying corrosion-resistant glaze on the bottom surface of the ceramic tile blank;

and finally, coating glaze on the two advancing sides of the ceramic tile blank body, wherein the corrosion-resistant glaze is coated on the two advancing sides, the left side and the right side of the ceramic tile blank body are coated with the corrosion-resistant glaze in the advancing process, so that the glaze application can be finished, then the two unglazed side surfaces of the ceramic tile blank body are clamped, the ceramic tile blank body is rotated by 90 degrees, and the ceramic tile blank body is conveyed into a kiln after the glaze application of the front side surface.

It should be noted that, because the difference between the melting temperature of the corrosion-resistant glaze and the melting temperature of the ceramic tile blank 2 is less than 1 ℃, and the difference between the expansion coefficient of the corrosion-resistant glaze and the expansion coefficient of the ceramic tile blank 2 is less than 1, the corrosion-resistant glaze cannot be separated from the bottom of the ceramic tile blank in the process of firing the glazed tile.

Further, since the corrosion-resistant glaze in the present technical solution is in direct contact with the roll bar in the kiln, the corrosion-resistant glaze inevitably sticks to the roll bar, but only a small amount of corrosion-resistant glaze sticks to the roll bar, and since the corrosion-resistant glaze of the present technical solution does not carry a decoration function, the effect can be ignored.

Preferably, the technical scheme can also distribute back primer on the bottom surface of the bottom surface anti-corrosion glaze layer 11 to form a back primer layer 6, and the back primer is favorable for preventing the anti-corrosion glaze positioned on the bottom surface from being adhered to a kiln roller rod.

Preferably, when the bottom surface of the green brick is glazed by using a roller-coating glazing mode to form a bottom surface anti-corrosion glaze layer 11, the glazing thickness is 0.5-0.8 mm;

when the bottom surface of the green brick is glazed by a spraying glazing method to form a bottom surface anti-corrosion glaze layer 11, the glazing thickness is 0.18-0.35 mm;

when the side surface of the green brick is glazed by using a brushing glazing mode to form the side surface anti-corrosion glaze layer 12, the glazing thickness is 0.02-0.05 mm.

Further, in the step A, the corrosion-resistant glaze is sieved by a 325-mesh sieve, and the screen residue is 0.5-0.8%.

When the fineness of the corrosion-resistant glaze is finer, the suspension property and the fluidity of the corrosion-resistant glaze are better, but if the fineness of the corrosion-resistant glaze is too coarse, the surface of the fired corrosion-resistant glaze is rough.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.