CN111018543A

CN111018543A - Once-fired ultra-large specification thin porcelain plate and production method thereof

Info

Publication number: CN111018543A
Application number: CN202010000312.8A
Authority: CN
Inventors: 余爱民; 曾成勇; 夏昌奎; 樊叶利; 李德发; 李志富; 朱爱余; 曹承鑫; 余惠
Original assignee: Deqing Nabel Ceramic Co ltd; Jiujiang Nabel Ceramic Co ltd; Hangzhou Nabel Ceramic Co ltd
Current assignee: Deqing Nabel Ceramic Co ltd; Jiujiang Nabel Ceramic Co ltd; Hangzhou Nabel Ceramic Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-04-17
Anticipated expiration: 2040-01-02
Also published as: CN111018543B

Abstract

The invention discloses a once-fired ultra-large specification thin porcelain plate and a production method thereof, wherein the production method comprises the following steps: A. preparing blank powder for the ultra-large specification thin porcelain plate according to a conventional method; B. preparing a ground glaze and a polishing glaze for the ultra-large specification thin porcelain plate according to a conventional method; C. distributing blank powder and performing die-free pressing forming; D. automatic green body cutting; E. drying the blank; F. baking; G. applying a base glaze for the ultra-large specification thin porcelain plate; H. drying again; I. ink-jet printing; J. applying polishing glaze for ultra-large specification thin porcelain plates; K. drying for the third time; l, firing; and M, edging. The invention has the beneficial effects that the invention provides the once-fired ultra-large specification thin porcelain plate and the production method thereof, solves the problems that the blank body of the thin porcelain plate is easy to damage after the traditional thin porcelain plate adopts wet glaze pouring and other water-containing decoration processes, and the defects of 'water ripple', 'frame', 'glaze curtain pull wire' and the like appear after the glaze is applied on the surface of the blank body, expands the decoration means of the ultra-large specification thin porcelain plate, is not only suitable for the anhydrous decoration process, but also can well apply the water-containing decoration process, obviously enriches the decoration style of the ultra-large specification thin porcelain plate, and improves the decoration effect.

Description

Once-fired ultra-large specification thin porcelain plate and production method thereof

Technical Field

The invention relates to the technical field of building ceramics, in particular to a once-fired ultra-large specification thin porcelain plate and a production method thereof.

Background

The natural stone is influenced by long-term geological motion and climate change and is mixed with associated minerals with other colors, so that high-end, natural and rich decorative effects are formed, and the natural stone is favored by people as a high-grade decorative material. However, the radioactive minerals associated with some natural stones may cause radioactive damage to human health; the natural stone affected by geological action and weathering has more defects such as impurities, cracks and the like, is easy to generate pathological changes, and has poor service performance. In addition, the natural stone is used as an unrenewable resource, is expensive and is difficult to enter common families; the transitional mining and processing of natural stones not only causes the exhaustion of rare and rare stone resources, but also seriously damages the natural ecological environment.

Under the circumstances, products such as ceramic tiles and ceramic plates mainly based on stone imitation are continuously developed on the market. According to the definition of ceramic tiles of the national standard GB/T4100-. The general specification is 0.6m × 0.6m (upper surface area 0.36 m)²) 0.8 m.times.0.8 m (upper surface area 0.64 m)²) The maximum can reach 1.2m multiplied by 1.2m (the upper surface area is 1.44 m)²）。

According to the definition of the ceramic plate of the national standard GB/T23266-2009 ceramic plate, the ceramic plate is a plate-shaped ceramic product which is made of clay and other inorganic non-metallic materials through the production processes of forming, high-temperature firing and the like, the thickness of the ceramic plate is not more than 6mm, and the upper surface area of the ceramic plate is not less than 1.62m²。

Chinese patent CN105622055A provides a method for preparing large-size ultrathin building ceramic tile blanks, which comprises the steps of mixing a plurality of raw materials according to a certain mass percentage, preparing glaze by a wet method, pressing into strips by a semi-dry pressing forming method, and sintering for 2 hours at a certain temperature to obtain the ceramic blanks. The method is to obtain a ceramic blank by drying and sintering a large-size ultrathin building ceramic tile after the ceramic blank is molded without texture decoration on the ceramic blank. Chinese patent CN101634185 discloses a large-sized porcelain tile imitating jade quality and a preparation method thereof, wherein a base material is distributed by pattern fixed point distribution, a semitransparent ceramic material and toner are applied to form a surface layer, and then the product is obtained by the working procedures of pressing, forming, drying, firing and the like. It can be found that in the prior art, the cloth and semi-dry pressing are mostly adopted to form a sheet blank, and then the sheet blank is dried and fired to prepare a large-size sheet, while the wet-process glaze slurry is sprayed and applied after the formed blank is adopted, and the water-containing decoration process of re-decoration, drying and firing is not reported. Therefore, the decoration effect of the ultra-large thin porcelain plate is limited.

The anhydrous decoration process refers to a decoration process of powder/dry particle cloth decoration, full-digital non-aqueous ink jet decoration or combination thereof adopted by the ceramic blank. The water-containing decoration process is a decoration process which at least adopts one of glaze and glaze with the water content of not less than 20 percent, screen printing glaze, roller printing glaze and water-based ink for decoration in one or more working procedures of the decoration process, and can be combined with powder/dry particle cloth decoration and non-water-based ink jet decoration.

The invention provides a once-fired ultra-large specification thin porcelain plate and a production method thereof, the thin porcelain plate produced by the technical scheme of the invention has large specification and thin thickness, is not only suitable for an anhydrous decoration process, but also suitable for a hydrous decoration process, has three-dimensional lines on decorative pattern grains, has vivid texture and decoration effect of natural stone, has no defects and radioactive hazards of the natural stone, can replace the natural stone, and enters people; and the mining and processing of rare and precious stone can be reduced, and the influence and damage to the natural environment are reduced.

Disclosure of Invention

The invention aims to solve the problems that the large-specification thin porcelain plate decoration means in the prior art is limited, the decoration effect is not rich enough, and the large-specification thin porcelain plate blank is easy to have the defects of breakage, 'water ripple', 'frame', 'glaze curtain pull wire' and the like after being subjected to a water-containing decoration process, particularly wet glaze pouring decoration, and provides a one-step firing ultra-large-specification thin porcelain plateA porcelain plate and a production method thereof. The once-fired oversized thin porcelain plate is a plate-shaped ceramic product prepared from clay and other inorganic non-metallic materials through production processes of molding, high-temperature firing and the like, the water absorption rate of the plate-shaped ceramic product is not higher than 0.5%, the thickness of the plate-shaped ceramic product is not more than 6mm, and the upper surface area of the plate-shaped ceramic product is not less than 1.62m²。

The invention also aims to provide a once-fired ultra-large specification thin porcelain plate product produced by using the method.

In order to realize the invention purpose of producing a once-fired ultra-large specification thin porcelain plate, the technical scheme of the invention is as follows: a production method for once-fired ultra-large specification thin porcelain plates comprises the following steps:

A. preparing blank powder for the ultra-large thin porcelain plate according to a conventional method for later use;

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：45%~50%、Al₂O₃：20%~28%、CaO：0~8%、MgO：0~3%、K₂O：1%~5%、Na₂O：1%~5%、ZnO：0~5%、BaO：10%~15%、ZrO₂: 0-5% for standby;

C. distributing blank powder and performing die-free press molding: b, distributing the blank powder for the ultra-large thin porcelain plate prepared in the step A according to the designed pattern texture, and forming by a die-free compression forming process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the formed blank is more than or equal to 1.95g/cm³；

D. Automatic green body cutting: c, automatically cutting the blank of the ultra-large thin porcelain plate which is formed by die-free pressing in the step C to obtain the required specification and size of the blank;

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method;

F. baking: e, drying the ultra-large thin porcelain plateBaking the blank body at the baking temperature of 500-800 ℃ for 5-15 min, wherein the volume weight of the baked ultra-large thin porcelain plate blank body is more than or equal to 1.80g/cm³The modulus of rupture of the baked green body is more than or equal to 3.0 MPa;

G. applying a base glaze for the ultra-large specification thin porcelain plate: b, applying the ground glaze for the ultra-large thin porcelain plate prepared in the step B on the surface of the ultra-large thin porcelain plate blank baked in the step F by using an ultra-large spraying disc, wherein the diameter of the end face circle of the lower end of the ultra-large spraying disc is more than or equal to 2400 mm;

H. and (3) drying again: drying the blank body of the ultra-large specification thin porcelain plate after the ground coat for the ultra-large specification thin porcelain plate is applied in the step G again according to a conventional method;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin porcelain plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, and matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture and texture, and the temperature of the blank before ink-jet printing is 40-70 ℃;

J. applying polishing glaze for ultra-large specification thin porcelain plates: b, applying the polishing glaze for the ultra-large thin porcelain plate with the slip limiting function, which is prepared in the step B, on the surface of the ultra-large thin porcelain plate blank subjected to ink jet printing in the step I by adopting the ultra-large shower tray in the step G;

K. and (3) drying for the third time: drying the blank body of the ultra-large thin porcelain plate which is applied in the step J and has the anti-slip function and is polished with glaze for the ultra-large thin porcelain plate for the third time according to a conventional method;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in a roller kiln for sintering, wherein the sintering temperature is 1150-1250 ℃, and the sintering period is 60-150 min, so as to obtain an ultra-large specification thin porcelain plate semi-finished product;

m, edging: and D, utilizing conventional edging processing equipment to carry out edging treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a one-time fired ultra-large specification thin porcelain plate finished product, wherein the thickness of the finished product is less than or equal to 6mm, and the upper surface area of the finished product is more than or equal to 1.62m²。

In the above steps, the conventional control means in the prior art is adopted, unless otherwise specified.

In order to accomplish the second purpose of the invention, the once-fired ultra-large specification thin porcelain plate product produced according to the steps is adopted.

As a further technical scheme, high-fire frits and/or corundum materials are introduced into the polishing glaze for the ultra-large thin porcelain plate with the anti-slip function in the step B, so that a mixed crystal phase of celsian and anorthite is generated in a polishing glaze layer of the ultra-large thin porcelain plate, and point-shaped hard protrusions are formed on the surface of the polishing glaze and are uniformly distributed, so that the good anti-slip function can be realized.

As a further technical scheme, the volume weight uniformity of each part of the ultra-large specification thin porcelain plate blank in the step C is good, and the volume weight difference between any two parts in the same ultra-large specification thin porcelain plate blank is less than or equal to 0.1g/cm³。

And C, the volume weight is calculated according to the national standard GB/T3810.3-2016 ceramic tile test method part 3: measurement of Water absorption, apparent porosity, apparent relative density and volume weight, volume weight is a quotient of the dry weight of the sample divided by the apparent volume (including pores). The performance of the invention is mainly used for measuring the densification degree of a thin porcelain plate after forming/drying a blank and firing. The bulk weight of the blank after the ultra-large specification thin porcelain plate is subjected to die-free press forming has extremely important significance, and on one hand, the method represents the densification degree of the blank after the ultra-large specification thin porcelain plate is formed, so that the blank can meet the requirement of the green strength of the subsequent process, and simultaneously ensures the sufficiency of the reaction among the powder particles of the ultra-large specification thin porcelain plate blank in the firing process; on the other hand, the volume weight difference between any two parts in the same ultra-large thin porcelain plate blank is less than or equal to 0.1g/cm by adjusting the die-free compression molding process and the performance of the powder of the ultra-large thin porcelain plate blank³The compactness degree of each part of the ultra-large specification thin porcelain plate blank is controlled to be uniform,the method ensures that each part of the ultra-large thin porcelain plate can be simultaneously shrunk and densified in the drying and firing processes, and is beneficial to improving the flatness of the ultra-large thin porcelain plate after drying and firing.

The baking in the step F mainly has the following functions:

the method can solve the problems that the ultra-large specification thin porcelain plate blank is easy to damage and the like caused by adopting a water-containing decoration process, particularly wet glaze spraying decoration after the ultra-large specification thin porcelain plate blank is formed. The wet glazing application mode is generally suitable for ceramic tiles with small specifications (the general specification is less than 900mm multiplied by 900 mm) or ceramic tiles with large thicknesses (the general thickness is more than 6 mm), but cannot be directly applied to large-specification or even ultra-large-specification thin ceramic boards, because the weight of an ultra-large-specification thin ceramic board blank is much larger than that of the ceramic tiles with traditional specifications (even thicker ceramic tiles), although the ultra-large-specification thin ceramic board blank has certain green body strength after being dried, if the wet glazing method is adopted for glazing slurry spraying, microscopically, due to hydration, water molecules in glaze permeate into a crystal lattice frame of powder on the surface of the blank, mineral molecules in the powder on the surface of the blank react with water molecules to generate solvated particles, the dissolving process of the powder is promoted, the cohesive force between the powder on the surface of the blank is further reduced, macroscopically, the powder on the surface of the blank absorbs moisture and expands, the bonding strength of the surface of the blank is damaged, the green strength of the upper half part of the blank is reduced sharply, a narrow strip-shaped conveying line (convenient for glaze recovery) is adopted during glaze spraying instead of a wide belt-shaped conveying line, the blank of the ultra-large thin porcelain plate is easy to deform and even exceeds the maximum deformation which the blank can bear, so that the blank is damaged, and particularly when the specification of the ultra-large thin porcelain plate is 900mm multiplied by 1800mm (the upper surface area is 1.62 m)²) Increase to 1600mm multiplied by 5200mm (upper surface area 8.32 m)²) This effect is more pronounced. After the baking process of the step F is adopted, the ultra-large thin porcelain plate blank has certain strength, and the hydration effect can be greatly weakened, so that the blank damage is greatly reduced.

And step F, enabling organic matters in the ultra-large thin porcelain plate blank to be discharged, and being beneficial to improving the surface quality of the ultra-large thin porcelain plate prepared after firing, wherein the temperature of the baking process is 500-800 ℃, the temperature stage belongs to a preheating zone of a traditional kiln, various organic matters in the ultra-large thin porcelain plate blank begin to be discharged in the stage, if carbonate and sulfate exist, the organic matters begin to decompose and discharge gas, intermolecular crystal water is removed, the blank shrinks and weight loss rapidly increases, clay structure water begins to be discharged, and about 573 ℃, β -quartz in the blank is converted to α -quartz crystal phase and is accompanied with volume expansion.

And thirdly, the decoration means and the decoration effect are enriched. The prior art mostly adopts cloth, semi-dry pressing and forming to form an oversized thin porcelain plate blank, drying and firing anhydrous decoration process, and adopts the wet glaze slurry spraying after blank forming, and the water-containing decoration process of decoration, drying and firing is not reported. Therefore, the decoration means and decoration effect of the ultra-large specification thin porcelain plate are limited. After the baking process of the step F of the invention is adopted, the thin porcelain plate blank has certain strength (the modulus of rupture is more than or equal to 3 MPa), and the method is not only suitable for the waterless decoration process, but also suitable for the water-containing decoration process, thereby enriching the decoration means and decoration effect of the ultra-large thin porcelain plate.

And fourthly, compared with the traditional biscuit firing process, the baking process in the step F of the invention also has obvious advantages. Bisque firing refers to a process of heat treatment of a green body at a certain temperature to make the green body have a certain mechanical strength. The biscuit firing temperature is 900-1100 ℃, the biscuit firing period is 50-100 min, and the biscuit firing temperature is high, so that the blank of the ultra-large thin porcelain plate has certain strength (the modulus of rupture is more than or equal to 10 MPa), the powder particles of the blank in the blank are rapidly gathered, air holes are extruded, the blank structure is remarkably densified, the adsorption capacity of the blank of the ultra-large thin porcelain plate after biscuit firing on wet glaze slurry is weakened, and the implementation of large-amount wet glaze spraying and other water-containing decoration processes is not facilitated. Compared with the prior art, the temperature of the baking process is lower, the period is shorter, the baked ultra-large thin porcelain plate blank has a strong adsorption capacity to wet glaze slip besides a certain strength (the modulus of rupture is more than or equal to 3 MPa), and the method is suitable for wet glaze pouring and other water-containing decoration processes; on the other hand, compared with biscuit firing, the baking temperature is lower, the period is shorter, the energy consumption of the kiln is lower, the production flow is quicker and more efficient, and the production cost is obviously reduced.

The traditional wet-process glaze pouring manner is easy to have a 'water ripple' defect, especially for large-size products, and the defect is that after the specification of the product is increased, the matched glaze pouring equipment is increased in size along with the increased size to aggravate mechanical shock, and the glaze curtain area is increased along with the increased size to cause uneven glaze slurry distribution and the like to cause uneven glaze slurry distribution, so that the surface of the product after being polished has ripple-like fluctuation like water surface ripple, and the surface decoration effect is influenced. Secondly, the glaze slurry is applied on the ultra-large specification thin porcelain plate in a wet glaze spraying mode, so that the 'frame' defect is easy to occur, namely the glaze slurry cannot be uniformly applied on the surface of the ultra-large specification thin porcelain plate blank due to the action of surface tension, so that local glaze accumulation is caused, and the 'frame' defect is formed. Thirdly, if the glaze slurry is applied to the ultra-large thin porcelain plate in a wet glaze pouring mode, the defect of 'glaze curtain wire-drawing' is easy to occur, because the specification of the ultra-large thin porcelain plate is obviously larger than that of the traditional ceramic tile, when the wet glaze pouring application is adopted, the size of the glaze pouring equipment is inevitably enlarged, the glaze slurry is difficult to form a glaze curtain with uniform distribution and components on the large glaze pouring equipment, and the glaze slurry has the possibility of causing the defect of 'glaze curtain wire-drawing' to occur during glaze pouring due to small amount of massive fake particles caused by precipitation or impurities left by incomplete cleaning of the glaze pouring equipment, so that the defect of local glaze lack is formed on the surface of a blank of the ultra-large thin porcelain plate, and the defect of pits is formed after sintering.

The method is characterized in that glaze slurry for the ultra-large specification thin porcelain plate main body with reasonable rheological property is prepared by designing and adopting an ultra-large glaze spraying disc with the lower end face circular diameter not less than 2400mm, the problems are better solved, aiming at the defects of 'water ripple' and 'frame', the drawing is combined with the drawing 1 and the drawing 2, the ultra-large glaze spraying disc designed by the invention comprises a glaze spraying cover a and a glaze distributing device b, the glaze spraying cover a is composed of a glaze spraying cover main body cambered surface a1 and a glaze spraying cover end cambered surface a2, the glaze distributing device b is positioned at the upper center of the glaze spraying cover a, compared with the traditional spraying disc, the ultra-large glaze spraying disc is mainly designed and improved from three aspects, namely, the ultra-large and ultra-large glaze spraying cover a has the lower end face circular diameter d not less than 2400mm, the requirement of the size of a spraying disc for the glaze slurry with the ultra-large specification ultra-large thin porcelain plate blank with the glaze spraying cover with the glaze slurry specification of which is designed for the spraying disc with the specification of the ultra-large glaze slurry specification, the first ultra-large glaze spraying cover a, the end face circular diameter of the lower end face circular diameter of the spraying cover a is not less than 4300mm, the end face circular diameter d, the arc face d of the glaze cover a, the glaze cover b is designed by the glaze slurry specification, the glaze slurry spraying cover blank of the glaze cover specification, the glaze slurry specification, the glaze cover specification of the glaze cover specification, the glaze slurry spraying cover specification of the spraying cover specification, the spraying cover specification of the glaze slurry spraying cover specification of the spraying cover specification, the spraying cover blank of the spraying plate, the spraying disc, the spraying cover specification of the spraying disc, the spraying cover specification, the spraying disc, the spraying cover specification, the spraying disc, the spraying cover specification, the spraying disc, the.

And (3) respectively adopting the wrapped red ink and the wrapped yellow ink as the red ceramic ink and the yellow ceramic ink in the step I. The existing yellow ceramic ink is prepared by mixing praseodymium yellow pigment with organic solvent, etc., however, the praseodymium yellow pigment has serious fading in the firing process after being prepared into the yellow ceramic ink, and the yellow ceramic ink shows light color development and greenish hue. The existing red ceramic ink is actually reddish brown ceramic ink, and the reddish brown ink adopts an iron oxide red pigment as a coloring agent, so that the color development is dark and not bright. Therefore, the red ceramic coating ink and the yellow ceramic coating ink are used for replacing the red brown ceramic ink and the yellow ceramic coating ink in the prior art, and the zirconium silicate crystals are used for coating the corresponding pigments in the red ceramic coating ink and the yellow ceramic coating ink.

However, since the coated red ceramic ink and the coated yellow ceramic ink are prepared by a coating process, and a layer of zirconium silicate crystal is coated on the surface of the corresponding pigment, the particle size of the coated red ceramic ink and the particle size of the coated yellow ceramic ink are both larger than that of the common ink particles, so that the coated red ceramic ink and the coated yellow ceramic ink are easy to precipitate. In view of the above, the present invention provides an improvement in the ink path system of a digital ink jet printer. The former equipment china ink bucket does not set up agitating unit, and the pottery ink just begins the stirring after being taken out the ink horn by the china ink bucket, leads to often having a large amount of precipitations in the china ink bucket. According to the invention, the stirring device is additionally arranged in the ink barrel, and the ceramic ink forms a loop from bottom to top in the ink barrel by adopting upward rotary stirring, so that the precipitation phenomenon is effectively eliminated. In addition, the ink path pipeline is changed from a small caliber to a large caliber, the circulation of the ceramic ink loop is accelerated, three filtering devices are additionally arranged, the proportion of large pigment particles entering the ink box is reduced, and the loss of the spray head is reduced.

The firing system in the step J needs to be correspondingly adjusted according to the produced thin porcelain plate, particularly, after the thickness of the ultra-large thin porcelain plate is further reduced, in the temperature rise stage of the firing process, because the temperatures of all sections of the kiln are different and the specification of the ultra-large thin porcelain plate is very large, when the ultra-large thin porcelain plate is conveyed and heated in a wide kiln by using a roller rod, a large longitudinal temperature difference is easily formed in the advancing direction of the ultra-large thin porcelain plate, namely, the temperature of the part of the same ultra-large thin porcelain plate close to the advancing direction of the ultra-large thin porcelain plate is higher, the temperature of the part of the same ultra-large thin porcelain plate is lower in the advancing direction of the ultra-large thin porcelain plate, and is just opposite in the temperature reduction stage, so that the large longitudinal temperature difference is formed on the same ultra-large thin porcelain plate, and the front end and back end of the ultra-large thin porcelain plate are not shrunk uniformly, the deformation is formed, the invention can well improve the shrinkage uniformity and the flatness after firing of the ultra-large specification thin porcelain plate by properly prolonging the temperature rising transition zone and the temperature reducing transition zone, namely realizing balanced temperature rising/reducing through a temperature rising system from a preheating zone to a firing zone and a temperature reducing system from the firing zone to a cooling zone, adjusting the air pressure and the excess air coefficient in the kiln and the like.

In the cooling stage of the firing process, if the internal stress of the ultra-large thin porcelain plate exists, local cracking caused by nonuniform stress release of the ultra-large thin porcelain plate is very easy to cause, therefore, the valve opening of a quenching air pipe in a kiln quenching area cannot be over-extended, the quenching openings of the upper layer and the lower layer of the roller rod are approximately consistent, so that the temperature difference between the upper layer and the lower layer of the roller rod is reduced, the stress generated by inconsistent internal and external contraction in the cooling process of a blank body is reduced, and the defects of wind cracking and the like of the product are avoided, the valve opening of a heat pumping opening is required to be adjusted in a slow cooling area, so that the conversion of the crystal form of α -quartz to β -quartz is stable, and partial stress is released as much as possible.

As a further technical scheme, in the step J, the water absorption rate of the ultra-large thin porcelain plate semi-finished product is less than or equal to 0.5 percent, the failure strength is more than or equal to 800N, the modulus of rupture is more than or equal to 48MPa, and the volume weight is more than or equal to 2.25g/cm³。

And as a further technical scheme, after the edge grinding treatment in the step K, cutting a finished product to obtain the required specification and size of the finished product.

As a further technical scheme, after the edge grinding treatment in the step K, a polishing process is adopted for treatment. The surface of the ultra-large thin porcelain plate prepared by the method is subjected to required polishing treatment by changing the material quality and polishing process parameters of the grinding block, so that a one-time fired ultra-large thin porcelain plate finished product with a soft surface can be obtained, and the glossiness is 15-30 gloss units; or obtaining a finished product of the once-fired ultra-large specification thin porcelain plate with a matte surface, wherein the glossiness is 5-15 gloss units.

The once-fired ultra-large specification thin porcelain plate produced by the invention has the following beneficial effects:

compared with the prior art which mostly adopts an anhydrous decoration process, the invention innovatively introduces the baking process into the production method of the ultra-large specification thin porcelain plate, and can solve the problems that the ultra-large specification thin porcelain plate blank is easy to damage and the like caused by adopting water-containing decoration processes such as wet glaze pouring and the like after the ultra-large specification thin porcelain plate blank is formed.

Compared with the existing decoration means and decoration effect of the thin porcelain plate, the invention innovatively introduces the baking process in the production method of the ultra-large thin porcelain plate, obviously improves the strength of the blank body of the ultra-large thin porcelain plate, and is suitable for the waterless decoration process and the water-containing decoration process, so that the decoration means and decoration effect are more abundant.

Compared with the traditional biscuit firing process, on one hand, the baking process has the advantages of lower temperature and shorter period, the baked ultra-large specification thin porcelain plate blank has a certain strength, still has strong adsorption capacity on wet glaze slurry, and is suitable for the wet glaze pouring decoration process, and the biscuit firing process has relatively higher temperature and longer period, so that the adsorption capacity of the ultra-large specification thin porcelain plate blank after biscuit firing on the wet glaze slurry is greatly weakened, and the biscuit firing process is not beneficial to the implementation of wet glaze pouring and other water-containing decoration processes; on the other hand, the baking temperature is lower, the period is shorter, the energy consumption of the kiln is lower, the production flow is quicker and more efficient, and the production cost is obviously reduced.

Compared with the traditional wet glaze pouring manner, the invention prepares the glaze slurry for the ultra-large specification thin porcelain plate with reasonable rheological property by designing and adopting the ultra-large pouring disc with the end face circle diameter of not less than 2400mm, better solves the defects of water ripple and frame, strictly controls the working procedures of deironing, sieving, storing and the like of the glaze slurry for the ultra-large specification thin porcelain plate by optimizing the process parameters of flow rate, specific gravity, viscosity and the like of the glaze slurry for the ultra-large specification thin porcelain plate, cleans related glaze applying equipment such as the ultra-large pouring disc, a glaze barrel and the like, and better solves the problem of glaze curtain wire pulling.

The invention can reduce the large longitudinal temperature difference of the ultra-large specification thin porcelain plate in the kiln firing process and well improve the shrinkage uniformity and the flatness after firing of the ultra-large specification thin porcelain plate by properly prolonging the temperature rising transition zone and the temperature reducing transition zone, namely realizing balanced temperature rising/reducing through a temperature rising system from the preheating zone to the firing zone and a temperature reducing system from the firing zone to the cooling zone, adjusting the coefficients of air pressure and excess air in the kiln and the like. Through the valve opening of the quenching air pipe in the quenching area of the kiln and the valve opening of the hot air pumping opening in the quenching area, the temperature difference between the upper layer and the lower layer of the roller rod is controlled within 50-100 ℃, and the problem of cooling and cracking of the ultra-large thin porcelain plate is effectively solved.

Drawings

FIG. 1 is a side view of the oversized shower tray of the present invention;

the glaze spraying device comprises a glaze spraying cover, b glaze dividing device, c glaze spraying cover end arc surface width, d glaze spraying cover lower end surface circle diameter, R1 arc surface radius of glaze spraying cover main body arc surface, R2 arc surface radius of glaze spraying cover end arc surface, L1 tangent line at intersection point of glaze spraying cover main body arc surface and glaze spraying cover end arc surface, L2 horizontal line, α included angle of L1 tangent line at intersection point of glaze spraying cover main body arc surface and glaze spraying cover end arc surface and L2 horizontal line.

FIG. 2 is a drawing of an oversized tray-type glaze pouring cover part of the invention:

wherein a1 is the cambered surface of the main body of the glaze pouring cover, and a2 is the cambered surface of the end part of the glaze pouring cover.

Detailed Description

Specific embodiments are given below in conjunction with fig. 1.

Example 1

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：45%、Al₂O₃：28%、CaO：4%、MgO：2%、K₂O：3%、Na₂O：4%、ZnO：1%、BaO：11%、ZrO₂: 2 percent for standby;

C. distributing blank powder and performing die-free press molding: b, distributing the blank powder for the ultra-large thin porcelain plate prepared in the step A according to the designed pattern texture, and forming by a die-free compression forming process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the formed blank is 1.95g/cm³；

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method, wherein the drying temperature is 150 ℃;

F. baking: e, baking the ultra-large thin porcelain plate blank dried in the step E, wherein the baking temperature is 700 ℃, the baking period is 10min, and the volume weight of the baked ultra-large thin porcelain plate blank is 1.80g/cm³After said bakingThe modulus of rupture of the blank is 3.0 MPa;

G. applying the ground glaze for the ultra-large specification thin porcelain plate, namely applying the ground glaze for the ultra-large specification thin porcelain plate prepared in the step B on the surface of the blank of the ultra-large specification thin porcelain plate baked in the step F by adopting an ultra-large tray, wherein the diameter d of the circle of the lower end face of the ultra-large tray is 2400mm, the radius R1 of the arc surface a1 of the glaze spraying cover main body of the ultra-large tray is 4300mm, the radius R2 of the arc surface a2 of the end part of the glaze spraying cover is 240mm, the included angle α between the 387L 1 of the intersection point of the arc surface of the glaze spraying cover main body and the arc surface of the end part of the glaze spraying cover and the horizontal line L2 is 20 degrees, and the width c of the arc surface a 39;

H. and (3) drying again: drying the blank body of the ultra-large specification thin porcelain plate after the ground coat for the ultra-large specification thin porcelain plate is applied in the step G according to a conventional method, wherein the drying temperature is 180 ℃;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin porcelain plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, and matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture and texture, and the temperature of the blank before ink-jet printing is 40 ℃;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in a roller kiln, and sintering by using a conventional thin porcelain plate sintering temperature system, a conventional pressure system and a conventional atmosphere system, wherein the sintering temperature is 1200 ℃, the sintering period is 100min, so as to obtain an ultra-large specification thin porcelain plate semi-finished product, the water absorption rate of the ultra-large specification thin porcelain plate semi-finished product is 0.2%, the breaking strength is 820N, the fracture modulus is 48MPa,volume weight 2.25g/cm³；

M, edging: and D, utilizing conventional edging processing equipment to carry out edging treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a finished product of the once-fired ultra-large specification thin porcelain plate, wherein the specification of the finished product is 1.6m multiplied by 4.8m (the upper surface area of the finished product is 7.68 m)²) And the thickness is 6 mm.

Example 2

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：50%、Al₂O₃：20%、CaO：8%、MgO：3%、K₂O：1%、Na₂O：1%、ZnO：2%、BaO：13%、ZrO₂: 2 percent, introducing high-fire-degree frits into the polishing glaze for later use;

C. distributing blank powder and performing die-free press molding: b, distributing the blank powder for the ultra-large thin porcelain plate prepared in the step A according to the designed pattern texture, and forming by a die-free compression forming process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the formed blank is 2.10g/cm³；

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method, wherein the drying temperature is 180 ℃;

F. baking: e, baking the ultra-large thin porcelain plate blank dried in the step E, wherein the baking temperature is 800 ℃, the baking period is 5min, and the volume weight of the baked ultra-large thin porcelain plate blank is 1.90g/cm³The modulus of rupture of the baked blank is 4.0 MPa;

G. applying the ground glaze for the ultra-large thin porcelain plate, namely applying the ground glaze for the ultra-large thin porcelain plate prepared in the step B on the surface of the blank of the ultra-large thin porcelain plate baked in the step F by using an ultra-large tray, wherein the diameter d of the end face circle of the lower end of the ultra-large tray is 2700mm, the arc radius R1 of the arc surface a1 of the glaze spraying cover main body of the ultra-large tray is 5000mm, the arc radius R2 of the arc surface a2 of the end part of the glaze spraying cover is 180mm, the included angle α between the line 387L 1 at the intersection point of the arc surface of the glaze spraying cover main body and the arc surface of the end part of the glaze spraying cover and the horizontal line L2 is 17 degrees, and the width c of the arc surface a;

H. and (3) drying again: drying the blank body of the ultra-large thin porcelain plate subjected to the step G of applying the glaze slurry for the ultra-large thin porcelain plate again according to a conventional method, wherein the drying temperature is 200 ℃;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin ceramic plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture, wherein the red ceramic ink and the yellow ceramic ink respectively adopt coated red ceramic ink and coated yellow ceramic ink, and the temperature of the blank before ink-jet printing is 70 ℃;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in a roller kiln, and sintering by using a conventional thin porcelain plate sintering temperature system, a conventional pressure system and a conventional atmosphere system, wherein the sintering temperature is 1250 ℃, and the sintering period is 60min to obtain an ultra-large specification thin porcelain plate semi-finished product, wherein the water absorption rate of the ultra-large specification thin porcelain plate semi-finished product is 0.1%, the breaking strength is 1010N, the breaking modulus is 55MPa, and the volume weight is 55MPa2.36g/cm³；

M, edging: and D, utilizing conventional edging processing equipment to carry out edging treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a finished product of the once-fired ultra-large specification thin porcelain plate, wherein the specification of the finished product is 1.6m multiplied by 3.2m (the upper surface area of the finished product is 5.12 m)²) And the thickness is 5.5 mm.

Example 3

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：47%、Al₂O₃：24%、CaO：0%、MgO：0%、K₂O：5%、Na₂O：5%、ZnO：0%、BaO：15%、ZrO₂: 4 percent, corundum is introduced into the polishing glaze for standby;

C. distributing blank powder and performing die-free press molding: distributing the blank powder for the ultra-large thin porcelain plate in the step A according to the designed pattern texture, and molding by a die-free compression molding process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the molded blank is 2.00g/cm³；

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method, wherein the drying temperature is 200 ℃;

F. baking: e, baking the ultra-large thin porcelain plate blank dried in the step E, wherein the baking temperature is 500 ℃, the baking period is 15min, and the volume weight of the baked ultra-large thin porcelain plate blank is 1.87g/cm³The modulus of rupture of the baked blank is 3.5 MPa;

G. applying the ground glaze for the ultra-large thin porcelain plate, namely applying the ground glaze for the ultra-large thin porcelain plate prepared in the step B on the surface of the blank of the ultra-large thin porcelain plate baked in the step F by using an ultra-large tray, wherein the diameter d of the circle of the lower end face of the ultra-large tray is 2450mm, the arc radius R1 of the arc surface a1 of the glaze spraying cover main body of the ultra-large tray is 4800mm, the arc radius R2 of the arc surface a2 of the end part of the glaze spraying cover is 220mm, the included angle α between the tangent line L1 at the intersection point of the arc surface of the glaze spraying cover main body and the arc surface of the end part of the glaze spraying cover and the horizontal line L2 is 10 degrees, and the width c of the arc surface a 39;

H. and (3) drying again: drying the blank body of the ultra-large thin porcelain plate subjected to the step G of applying the glaze slurry for the ultra-large thin porcelain plate again according to a conventional method, wherein the drying temperature is 150 ℃;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin ceramic plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture, wherein the red ceramic ink and the yellow ceramic ink respectively adopt coated red ceramic ink and coated yellow ceramic ink, and the temperature of the blank before ink-jet printing is 55 ℃;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in the step K into a roller kiln, and sintering by using a conventional thin porcelain plate sintering temperature system, a conventional pressure system and a conventional atmosphere system, wherein the sintering temperature is 1150 ℃, the sintering period is 150min, so as to obtain the ultra-large specification thin porcelain plate semi-finished product, the water absorption rate of the ultra-large specification thin porcelain plate semi-finished product is 0.07%, the breaking strength is 1216N, the breaking modulus is 50MPa, and the bulk weight is 2.39g/cm³；

M, edging and polishing: and D, utilizing conventional edging and polishing processing equipment to carry out edging and polishing treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a finished product of the once-fired ultra-large specification thin porcelain plate with a soft surface effect on the surface, wherein the specification of the finished product is 0.9m multiplied by 1.8m (the upper surface area is 1.62 m)²) Thickness 5.8mm and gloss 22 gloss units.

Example 4

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：48%、Al₂O₃：26%、CaO：5%、MgO：1%、K₂O：2%、Na₂O：3%、ZnO：5%、BaO：10%、ZrO₂: 0 percent of high-fire-degree fusion cake and corundum are introduced into the polishing glaze for standby;

C. distributing blank powder and performing die-free press molding: b, distributing the blank powder for the ultra-large thin porcelain plate prepared in the step A according to the designed pattern texture, and forming by a die-free compression forming process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the formed blank is 2.05g/cm³；

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method, wherein the drying temperature is 220 ℃;

F. baking: e, baking the ultra-large thin porcelain plate blank dried in the step E, wherein the baking temperature is 650 ℃, the baking period is 8min, and the volume weight of the baked ultra-large thin porcelain plate blank is 1.85g/cm³The modulus of rupture of the baked blank is 3.3 MPa;

G. applying the ground glaze for the ultra-large thin porcelain plate, namely applying the ground glaze for the ultra-large thin porcelain plate prepared in the step B on the surface of the blank of the ultra-large thin porcelain plate baked in the step F by using an ultra-large tray, wherein the diameter d of the end face circle of the lower end of the ultra-large tray is 2600mm, the arc radius R1 of the arc surface a1 of the glaze spraying cover main body of the ultra-large tray is 4500mm, the arc radius R2 of the arc surface a2 of the end part of the glaze spraying cover is 200mm, the included angle α between the 38732 tangent line at the intersection point of the arc surface of the glaze spraying cover main body and the arc surface of the end part of the glaze spraying cover and the horizontal line L2 is 13 degrees, and the width c of the arc surface a 39;

H. and (3) drying again: drying the blank body of the ultra-large thin porcelain plate subjected to the step G of applying the glaze slurry for the ultra-large thin porcelain plate again according to a conventional method, wherein the drying temperature is 170 ℃;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin porcelain plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, and matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture and texture, and the temperature of the blank before ink-jet printing is 60 ℃;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in a roller kiln, and sintering by using a conventional thin porcelain plate sintering temperature system, a conventional pressure system and a conventional atmosphere system, wherein the sintering temperature is 1180 ℃, the sintering period is 120min, so as to obtain the ultra-large specification thin porcelain plate semi-finished product, the ultra-large specification thin porcelain plate semi-finished product has the water absorption rate of 0.25%, the breaking strength of 880N, the breaking modulus of 60MPa and the volume weight of 2.32g/cm³；

M, edging and polishing: and D, utilizing conventional edging and polishing processing equipment to carry out edging and polishing treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a one-time sintered ultra-large specification thin porcelain plate finished product with a matte effect on the surface, wherein the specification of the finished product is 1.6m multiplied by 5.2m (the upper surface area is 8.32 m)²) Thickness 4.5mm, gloss 13 gloss units.

Example 5

B. preparing a ground glaze for an oversized thin porcelain plate according to a conventional method, and preparing a polishing glaze for an oversized thin porcelain plate with an anti-slip function according to the conventional method, wherein the polishing glaze comprises the chemical composition of SiO in percentage by weight₂：46%、Al₂O₃：22%、CaO：3%、MgO：1%、K₂O：4%、Na₂O：2%、ZnO：3%、BaO：14%、ZrO₂: 5% for standby;

C. distributing blank powder and performing die-free press molding: distributing the blank powder for the ultra-large thin porcelain plate in the step A according to the designed pattern texture, and molding by a die-free compression molding process to obtain the ultra-large thin porcelain plate blank, wherein the bulk weight of the molded blank is 1.98g/cm³；

E. drying the blank: d, drying the ultra-large specification thin porcelain plate blank subjected to automatic blank cutting in the step D according to a conventional method, wherein the drying temperature is 175 ℃;

F. baking: e, baking the ultra-large thin porcelain plate blank dried in the step E, wherein the baking temperature is 750 ℃, the baking period is 11min, and the volume weight of the baked ultra-large thin porcelain plate blank is 1.83g/cm³The modulus of rupture of the baked blank is 5.1 MPa;

G. applying the ground glaze for the ultra-large thin porcelain plate, namely applying the ground glaze for the ultra-large thin porcelain plate prepared in the step B on the surface of the blank of the ultra-large thin porcelain plate baked in the step F by using an ultra-large tray, wherein the diameter d of the circle of the lower end face of the ultra-large tray is 2550mm, the radius R1 of the arc surface a1 of the glaze spraying cover body of the ultra-large tray is 4700mm, the radius R2 of the arc surface a2 of the end part of the glaze spraying cover is 210mm, the included angle α between the tangent line L1 at the intersection point of the arc surface of the glaze spraying cover body and the arc surface of the end part of the glaze spraying cover and the horizontal line L2 is 15 degrees, and the width c of the arc surface a2 of the;

H. and (3) drying again: drying the blank body of the ultra-large thin porcelain plate subjected to the step G of applying the glaze slurry for the ultra-large thin porcelain plate again according to a conventional method, wherein the drying temperature is 190 ℃;

I. ink-jet printing: spraying ceramic ink on the ultra-large thin porcelain plate blank dried again in the step H by using a digital ink-jet printer according to a designed pattern, and matching with the pattern texture of the blank, so that the surface after ink-jet printing and the blank have similar texture and texture, and the temperature of the blank before ink-jet printing is 65 ℃;

J. applying polishing glaze for ultra-large specification thin porcelain plates: b, applying the polishing glaze for the thin porcelain plate with the slip limiting function, which is prepared in the step B, on the surface of the blank of the ultra-large specification thin porcelain plate subjected to ink jet printing in the step I by adopting the ultra-large shower tray in the step G;

l, firing: placing the ultra-large specification thin porcelain plate blank dried for the third time in the step K into a roller kiln, and sintering by using a conventional thin porcelain plate sintering temperature system, a conventional pressure system and a conventional atmosphere system, wherein the sintering temperature is 1220 ℃, and the sintering period is 80min, so as to obtain the ultra-large specification thin porcelain plate semi-finished product, wherein the ultra-large specification thin porcelain plate semi-finished product has the water absorption rate of 0.09%, the failure strength of 930N, the breaking modulus of 63MPa and the bulk weight of 2.37g/cm³；

M, edging: utilize conventional edging to process and establishAnd step L, performing edge grinding treatment on the semi-finished product of the ultra-large specification thin porcelain plate prepared in the step L to prepare a finished product of the once-fired ultra-large specification thin porcelain plate, wherein the specification of the finished product is 1.6m multiplied by 4.0m (the upper surface area of the finished product is 6.40 m)²) And the thickness is 3 mm.

Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims

1. A production method for once-fired ultra-large specification thin porcelain plates is characterized by comprising the following steps:

F. baking: e, drying the ultra-large specification thin porcelain plate blankBaking at 500-800 ℃ for 5-15 min, wherein the volume weight of the baked ultra-large thin porcelain plate blank is more than or equal to 1.80g/cm³The modulus of rupture of the baked green body is more than or equal to 3.0 MPa;

2. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and B, introducing high-fire-degree frits and/or corundum materials into the polishing glaze for the ultra-large thin porcelain plate with the anti-slip function.

3. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: in the step C, the volume weight difference between any two parts of the blank of the ultra-large thin porcelain plate in the same sheet is less than or equal to 0.1g/cm³。

4. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and G, the arc radius of the arc surface of the glaze pouring cover main body of the oversized glaze pouring tray is 4300-5000 mm, and the arc radius of the arc surface of the end part of the glaze pouring cover is 180-240 mm.

5. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and G, forming an included angle of 10-20 degrees between a tangent line at the intersection point of the arc surface of the glaze pouring cover body of the oversized pouring tray and the arc surface of the end part of the glaze pouring cover and a horizontal line.

6. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and G, the width of the cambered surface at the end part of the glaze spraying cover of the oversized spraying disc is 80-120 mm.

7. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and (3) respectively adopting the wrapped red ceramic ink and the wrapped yellow ceramic ink in the step (I).

8. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: step JThe water absorption rate of the ultra-large thin porcelain plate semi-finished product is less than or equal to 0.5 percent, the failure strength is more than or equal to 800N, the breaking modulus is more than or equal to 48MPa, and the volume weight is more than or equal to 2.25g/cm³。

9. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and D, after the edging treatment in the step K, cutting a finished product to obtain the required specification and size of the finished product.

10. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 1, wherein: and D, after the edging treatment in the step K, adopting a polishing process for treatment.

11. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 10, wherein: after the polishing process is adopted for treatment, the finished product of the once-fired ultra-large specification thin porcelain plate with the soft surface is prepared, and the glossiness is 15-30 gloss units.

12. The method for producing a single-fired ultra-large thin porcelain plate as claimed in claim 10, wherein: after the polishing process is adopted for treatment, the finished product of the once-fired ultra-large specification thin porcelain plate with the matte surface is prepared, and the glossiness is 5-15 gloss units.

13. The one-shot ultra-large thin porcelain plate product produced by the one-shot ultra-large thin porcelain plate production method according to any one of claims 1 to 12.