CN113149599B - High-strength light egg white enamel - Google Patents
High-strength light egg white enamel Download PDFInfo
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- CN113149599B CN113149599B CN202110284949.9A CN202110284949A CN113149599B CN 113149599 B CN113149599 B CN 113149599B CN 202110284949 A CN202110284949 A CN 202110284949A CN 113149599 B CN113149599 B CN 113149599B
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- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
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- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
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Abstract
A high-strength light egg white enamel comprises a body and egg white glaze; the blank body consists of the following raw materials: the porcelain glaze prepared by the invention is moist, devitrified and fine and is white and bluish-white, and the andalusite, the shale and the zirconia are introduced into the blank raw materials to be matched so as to improve the strength of the porcelain; the germanized sericite is introduced to be matched with magnesium oxide so as to ensure that a blank body after biscuit firing does not turn yellow, ensure the whiteness of the blank body and be beneficial to the color generation of the egg white glaze; and simultaneously, the chemical composition of the blank body is strictly controlled, so that the egg white glaze can be well combined with the blank body, the final color generation of the egg white glaze is facilitated, and the Al content in the blank body is improved 2 O 3 The content of the component (A) can reduce the deformation of a blank body at high temperature to the maximum extent, so that the fired porcelain glaze is moist, devitrified and fine.
Description
Technical Field
The invention belongs to the field of daily porcelain, and particularly relates to high-strength light egg white glazed porcelain.
Background
The glaze is a colorless or colored vitreous thin layer covered on the surface of a porcelain product, and is prepared by grinding mineral raw materials (feldspar, quartz, talc, kaolin and the like) according to a certain proportion to prepare glaze slurry, applying the glaze slurry on the surface of a blank body, and calcining at a certain temperature. It can increase the mechanical strength, thermal stability and dielectric strength of the product, and also has the characteristics of beautifying the ware, being convenient for wiping and washing, being not eroded by the fishy smell and dirt, etc.
The egg white glaze is a high-temperature glaze newly burned in a Yuan-Dynasty Jingdezhen kiln, and is named because the glaze color is similar to that of a goose egg and shows a slightly green color tone in white. However, the firing range of the ovoid white glaze is narrow, and bubbles are easily generated or a large amount of carbon is easily absorbed (smoking and smoking) when the firing atmosphere is improperly controlled, so that the whiteness of the shade yellow of the glaze surface is poor, the yield is low, and further improvement is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-strength light egg white enamel.
The invention adopts the following technical scheme:
a high-strength light egg white enamel comprises a body and egg white glaze;
the blank body comprises the following raw materials in parts by weight: 22-28 parts of germanized anorthite, 20-30 parts of germanized kaolin, 18-25 parts of germanized sericite, 12-15 parts of shale, 15-20 parts of andalusite, 5-10 parts of zirconia, 6-8 parts of alumina and 3-5 parts of magnesia;
the egg white glaze is prepared from the following raw materials in parts by weight: 30-40 parts of germanized potassium feldspar, 15-20 parts of zirconite, 18-25 parts of germanized sericite, 8-12 parts of zinc oxide, 4-7 parts of zirconium silicate, 1-3 parts of cerium dioxide and 6-8 parts of frit;
the preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, respectively crushing, mixing and performing wet ball milling on the raw materials to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to magnetic separation for multiple deironing until the iron content of the blank slurry is lower than 0.05 percent;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 6-7 hours at 850-920 ℃ to obtain a biscuit;
and step four, applying glaze slurry on the surface of the biscuit, after the glaze slurry on the surface of the biscuit is dried, feeding the ceramic biscuit into a kiln, and firing and forming at the firing temperature of 1320-1380 ℃ in a reducing atmosphere.
Further, the frit comprises the following chemical components: siO 2 2 ：46.8-53.4％、Al 2 O 3 ：20.6-27.6％、K 2 O：8.2-10.3％、Na 2 O：5.4-6.8％、CaO：1.6-2.4％、MgO：2.7-3.5％、ZnO：1.6-3.4％、TiO 2 ：2.5-3.2％。
Further, the chemical composition of the blank is as follows: siO 2 2 ：40.6-44.3％、Al 2 O 3 ：32.3-35.2％、CaO：7.2-8.6％、MgO：5.2-6.4％、Na 2 O：3.3-3.9％、K 2 O：1.6-2.5％、Fe 2 O 3 ：0.1-0.16％、ZrO 2 ：1.6-2.3％、I.L：1.7-3.04％。
Further, in the fourth step, the firing is specifically controlled as follows:
and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 420-450 ℃, and burning for 1-2h under the condition of heat preservation;
and (3) decomposition and oxidation stage: heating to 860-920 ℃ in the kiln, and keeping the temperature for firing for 3.5-4.5 hours;
a reduction stage: continuously heating to 1280-1350 ℃ in the kiln, and keeping the temperature for firing for 4-6h;
and (3) a high-temperature firing stage: controlling the temperature in the kiln at 1320-1380 ℃, and keeping the temperature for firing for 2-4 hours;
and (3) natural cooling stage: cooling the mixture in the kiln to room temperature, and prolonging the cooling time to more than 10 hours.
Furthermore, in the reduction stage of the fourth step, the content of carbon monoxide is 5.4-5.9%, and the content of oxygen is 1.1-1.5%.
Furthermore, in the high-temperature sintering stage in the fourth step, the content of carbon monoxide is 8.6-9.7%, and the content of oxygen is 0.1-0.18%.
Further, in the first step, when wet ball milling is performed on the green slurry, the raw materials are wet-milled in a ball mill for 18-24 hours, the milling medium is water, and the raw materials: ball: water = 1.2-1.5.
Further, in the first step, when the glaze slip is wet-milled, the raw materials are wet-milled in a ball mill for 36-42 hours, the milling medium is water, and the raw materials: ball: water = 1.8-2.2.
Further, in the fourth step, the glazing mode of the glaze slurry is glaze spraying or glaze pouring.
Further, in the second step, the intensity of the magnetic separator is 18000-20000GS.
From the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:
firstly, the glaze surface of the porcelain prepared by the method is moist, devitrified and fine, is white and bluish-white, and is in an egg white color, andalusite, shale and zirconia are introduced into blank raw materials to be matched, so that the strength of the porcelain is improved; the germanized sericite is introduced to be matched with magnesium oxide so as to ensure that a blank body after biscuit firing does not turn yellow, ensure the whiteness of the blank body and be beneficial to the color generation of the egg white glaze; at the same time, the chemical composition of the blank is strictly controlled, so that the eggs are obtainedThe white glaze can be well combined with the blank body, is beneficial to the final color generation of the egg white glaze, and improves Al in the blank body 2 O 3 The content of the components reduces the deformation of a blank body at high temperature to the maximum extent, so that the glaze of the fired porcelain is moist, devitrified and fine;
secondly, zirconium silicate, cerium oxide and zirconite are introduced into the raw materials of the glaze to be matched, so that the fired porcelain glaze is fine, smooth and devitrified, and the chemical components of the frit are strictly controlled to increase the firing range of the egg white glaze, so that the egg white glaze can be fired at the temperature limited by the invention to facilitate the final color generation of the egg white glaze;
thirdly, the sintering progress of the egg white glaze and the control of the sintering atmosphere in each stage are specifically limited, so that the glaze surface of the sintered porcelain is ensured to be egg white with a bluish white middle.
Detailed Description
The invention is further described below by means of specific embodiments.
A high-strength light egg white enamel porcelain comprises a body and egg white glaze.
The blank body comprises the following raw materials in parts by weight: 22-28 parts of germanized anorthite, 20-30 parts of germanized kaolin, 18-25 parts of germanized sericite, 12-15 parts of shale, 15-20 parts of andalusite, 5-10 parts of zirconia, 6-8 parts of alumina and 3-5 parts of magnesia.
The chemical composition of the green body was as follows: siO 2 2 ：40.6-44.3％、Al 2 O 3 ：32.3-35.2％、CaO：7.2-8.6％、MgO：5.2-6.4％、Na 2 O：3.3-3.9％、K 2 O：1.6-2.5％、Fe 2 O 3 ：0.1-0.16％、ZrO 2 ：1.6-2.3％、I.L：1.7-3.04％。
The egg white glaze is prepared from the following raw materials in parts by weight: 30-40 parts of germanized potash feldspar, 15-20 parts of zirconite, 18-25 parts of germanized sericite, 8-12 parts of zinc oxide, 4-7 parts of zirconium silicate, 1-3 parts of cerium dioxide and 6-8 parts of frit.
The frit has the following chemical composition: siO 2 2 ：46.8-53.4％、Al 2 O 3 ：20.6-27.6％、K 2 O：8.8-10.3％、Na 2 O：5.4-6.8％、CaO：1.6-2.4％、MgO：2.7-3.5％、ZnO：1.6-3.4％、TiO 2 ：2.5-3.2％。
The preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, respectively crushing, mixing and performing wet ball milling on the raw materials to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to magnetic separation for multiple deironing until the iron content of the blank slurry is lower than 0.05 percent, wherein the strength of the magnetic separation machine is 18000-20000GS;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 6-7 hours at 850-920 ℃ to obtain a biscuit;
step four, applying glaze slip on the surface of the biscuit in a glaze spraying or glaze pouring mode, after the glaze slip on the surface of the biscuit is dried, feeding the ceramic biscuit into a kiln, and firing and forming under a reducing atmosphere, wherein the firing temperature is 1320-1380 ℃, and the firing is specifically controlled as follows:
a low-temperature stage: heating the temperature in the kiln from normal temperature to 420-450 ℃, and burning for 1-2h under heat preservation;
and (3) decomposition and oxidation stage: heating to 860-920 ℃ in the kiln, and keeping the temperature for firing for 3.5-4.5 hours;
a reduction stage: continuously heating to 1280-1350 ℃ in the kiln, and keeping the temperature for firing for 4-6h;
and (3) a high-temperature firing stage: controlling the temperature in the kiln at 1320-1380 ℃, and keeping the temperature for firing for 2-4 hours;
and (3) natural cooling stage: cooling the mixture in the kiln to room temperature, wherein the cooling time is prolonged to more than 10 hours.
In the step one, when wet ball milling is carried out on the blank slurry, the raw materials are ground in a ball mill for 18-24 hours by a wet method, the grinding medium is water, and the raw materials: ball: water = 1.2-1.5; in the first step, when wet ball milling is carried out on the glaze slip, the raw materials are wet-milled for 36-42 hours in a ball mill, the milling medium is water, and the raw materials are as follows: ball: water = 1.8-2.2.
In the reduction stage of the fourth step, the content of carbon monoxide is 5.4-5.9%, and the content of oxygen is 1.1-1.5%; in the high-temperature sintering stage, the content of carbon monoxide is 8.6-9.7%, and the content of oxygen is 0.1-0.18%.
Example 1
A high-strength light egg white enamel porcelain comprises a body and egg white glaze.
The blank body is composed of the following raw materials in parts by weight: 22 parts of germanized anorthite, 30 parts of germanized kaolin, 18 parts of germanized sericite, 15 parts of shale, 15 parts of andalusite, 5 parts of zirconia, 8 parts of alumina and 5 parts of magnesia.
The chemical composition of the green body was as follows: siO 2 2 ：40.6％、Al 2 O 3 ：35.2％、CaO：7.2％、MgO：6.4％、Na 2 O：3.3％、K 2 O：2.5％、Fe 2 O 3 ：0.16％、ZrO 2 ：1.6％、I.L：3.04％。
The egg white glaze is prepared from the following raw materials in parts by weight: 30 parts of germanized potash feldspar, 20 parts of zirconite, 18 parts of germanized sericite, 12 parts of zinc oxide, 4 parts of zirconium silicate, 3 parts of cerium dioxide and 6 parts of frit.
The frit has the following chemical composition: siO 2 2 ：46.8％、Al 2 O 3 ：27.6％、K 2 O：10.3％、Na 2 O：5.4％、CaO：2.4％、MgO：2.7％、ZnO：1.6％、TiO 2 ：3.2％。
The preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, and respectively crushing, mixing and ball-milling the raw materials by a wet method to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to magnetic separation for multiple deironing until the iron content of the blank slurry is lower than 0.05 percent, wherein the strength of the magnetic separation is 18000GS;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 7 hours at 850 ℃ to obtain a biscuit;
and step four, applying glaze slip on the surface of the biscuit in a glaze spraying or glaze pouring mode, after the glaze slip on the surface of the biscuit is dried, sending the ceramic biscuit into a kiln, and firing and forming in a reducing atmosphere, wherein the firing temperature is 1320 ℃, and the firing is specifically controlled as follows:
and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 420 ℃, and burning for 2h under the condition of heat preservation;
and (3) decomposition and oxidation stage: heating to 860 deg.c inside the kiln, maintaining the temperature for 4.5 hr;
and (3) reduction stage: continuously heating to 1280 ℃ in the kiln, and carrying out heat preservation firing for 6h;
and (3) high-temperature firing stage: controlling the temperature in the kiln at 1320 ℃, and keeping the temperature for firing for 2 hours;
and (3) natural cooling: cooling the mixture in the kiln to room temperature, wherein the cooling time is prolonged to more than 10 hours.
In the step one, when wet ball milling is carried out on the blank slurry, the raw materials are ground in a ball mill for 18 hours by a wet method, the grinding medium is water, and the raw materials: ball: water = 1.2; in the first step, when wet ball milling is carried out on the glaze slip, the raw materials are wet-milled for 36 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water = 1.2.
In the reduction stage of the fourth step, the content of carbon monoxide is 5.4 percent, and the content of oxygen is 1.1 percent; in the high-temperature firing stage, the content of carbon monoxide was 8.6%, and the content of oxygen was 0.1%.
Example 2
A high-strength light egg white enamel porcelain comprises a body and egg white glaze.
The blank body comprises the following raw materials in parts by weight: 28 parts of germanized anorthite, 20 parts of germanized kaolin, 25 parts of germanized sericite, 12 parts of shale, 20 parts of andalusite, 10 parts of zirconia, 6 parts of alumina and 3 parts of magnesia.
The chemical composition of the green body was as follows: siO 2 2 ：44.3％、Al 2 O 3 ：32.3％、CaO：8.6％、MgO：5.2％、Na 2 O：3.9％、K 2 O：1.6％、Fe 2 O 3 ：0.1％、ZrO 2 ：2.3％、I.L：1.7％。
The egg white glaze is prepared from the following raw materials in parts by weight: 40 parts of potassium germanate feldspar, 15 parts of zirconite, 25 parts of germanic sericite, 8 parts of zinc oxide, 7 parts of zirconium silicate, 1 part of cerium dioxide and 8 parts of frit.
The frit comprises the following chemical components: siO 2 2 ：53.4％、Al 2 O 3 ：20.6％、K 2 O：8.2％、Na 2 O：6.8％、CaO：1.6％、MgO：3.5％、ZnO：3.4％、TiO 2 ：2.5％。
The preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, and respectively crushing, mixing and ball-milling the raw materials by a wet method to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to magnetic separation for multiple deironing until the iron content of the blank slurry is lower than 0.05 percent, wherein the strength of the magnetic separation is 20000GS;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 6 hours at 920 ℃ to obtain a biscuit;
and step four, applying glaze slip on the surface of the biscuit in a glaze spraying or glaze pouring mode, after the glaze slip on the surface of the biscuit is dried, sending the ceramic biscuit into a kiln, and firing and forming under a reducing atmosphere, wherein the firing temperature is 1380 ℃, and the firing is specifically controlled as follows:
a low-temperature stage: heating the temperature in the kiln from normal temperature to 450 ℃, and burning for 1h under the condition of heat preservation;
and (3) decomposition and oxidation stage: heating to 920 ℃ in the kiln, and keeping the temperature for firing for 3.5 hours;
and (3) reduction stage: continuously heating to 1350 ℃ in the kiln, and burning for 4 hours in a heat preservation way;
and (3) high-temperature firing stage: controlling the temperature in the kiln to 1380 ℃, and keeping the temperature for firing for 2 hours;
and (3) natural cooling: cooling the mixture in the kiln to room temperature, and prolonging the cooling time to more than 10 hours.
In the first step, when wet ball milling is carried out on the blank slurry, the raw materials are ground in a wet method in a ball mill for 24 hours, the grinding medium is water, and the raw materials are as follows: ball: water = 1.5; in the first step, when wet ball milling is carried out on the glaze slip, the raw materials are ground in a ball mill for 42 hours by a wet method, the grinding medium is water, and the raw materials: ball: water = 1.8.
In the reduction stage of the fourth step, the content of carbon monoxide is 5.9 percent, and the content of oxygen is 1.5 percent; in the high-temperature firing stage, the content of carbon monoxide was 9.7%, and the content of oxygen was 0.18%.
Example 3
A high-strength light egg white enamel porcelain comprises a body and egg white glaze.
The blank body is composed of the following raw materials in parts by weight: 25 parts of germanized anorthite, 25 parts of germanized kaolin, 22 parts of germanized sericite, 13 parts of shale, 18 parts of andalusite, 8 parts of zirconia, 7 parts of alumina and 4 parts of magnesia.
The chemical composition of the green body was as follows: siO 2 2 ：42.4％、Al 2 O 3 ：33.6％、CaO：8.1％、MgO：5.9％、Na 2 O：3.5％、K 2 O：1.8％、Fe 2 O 3 ：0.12％、ZrO 2 ：1.9％、I.L：2.68％。
The egg white glaze is prepared from the following raw materials in parts by weight: 35 parts of germanized potash feldspar, 18 parts of zirconite, 22 parts of germanized sericite, 10 parts of zinc oxide, 5 parts of zirconium silicate, 2 parts of cerium dioxide and 7 parts of frit.
The frit has the following chemical composition: siO 2 2 ：49.6％、Al 2 O 3 ：24.5％、K 2 O：9.8％、Na 2 O：5.9％、CaO：1.8％、MgO：3.1％、ZnO：2.5％、TiO 2 ：2.8％。
The preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, respectively crushing, mixing and performing wet ball milling on the raw materials to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to magnetic separation for multiple deironing until the iron content of the blank slurry is lower than 0.05 percent, wherein the strength of the magnetic separation is 19000GS;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 6.5 hours at 890 ℃ to obtain a biscuit;
step four, applying glaze slip on the surface of the biscuit in a glaze spraying or glaze pouring mode, after the glaze slip on the surface of the biscuit is dried, feeding the ceramic biscuit into a kiln, and firing and forming under a reducing atmosphere, wherein the firing temperature is 1350 ℃, and the firing is specifically controlled as follows:
a low-temperature stage: heating the temperature in the kiln from normal temperature to 435 ℃, and firing for 1.5h under the condition of heat preservation;
and (3) decomposition and oxidation stage: heating to 890 ℃ in the kiln, and keeping the temperature for firing for 4 hours;
a reduction stage: continuously heating to 1330 ℃ in the kiln, and keeping the temperature for firing for 5 hours;
and (3) high-temperature firing stage: controlling the temperature in the kiln to 1350 ℃, and keeping the temperature for firing for 3 hours;
and (3) natural cooling: cooling the mixture in the kiln to room temperature, wherein the cooling time is prolonged to more than 10 hours.
In the first step, when wet ball milling is carried out on the blank slurry, the raw materials are ground in a wet method in a ball mill for 22 hours, the grinding medium is water, and the raw materials are as follows: ball: water = 1.3; in the first step, when wet ball milling is carried out on the glaze slip, the raw materials are ground in a ball mill for 39 hours by a wet method, the grinding medium is water, and the raw materials: ball: water = 1.6.
In the reduction stage of the fourth step, the content of carbon monoxide is 5.6 percent, and the content of oxygen is 1.3 percent; in the high-temperature firing stage, the content of carbon monoxide was 9.2%, and the content of oxygen was 0.15%.
The three examples and the existing egg white porcelain are tested to obtain the following performance parameters:
TABLE 1 table of Performance parameters for the examples
From the above test data, it can be seen that: according to the invention, andalusite, shale and zirconia are introduced into the raw materials of the blank body to be matched, so that compared with the egg-white enamel in the prior art, the prepared egg-white enamel is high in flexural strength, small in density and light in weight, and meets the use requirements of daily-use porcelain.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, and the equivalent variations and modifications made in the claims and the description of the present invention should be included in the scope of the present invention.
Claims (8)
1. The high-strength light egg white enamel is characterized in that: comprises a blank body and egg white glaze;
the blank body comprises the following raw materials in parts by weight: 22-28 parts of germanized anorthite, 20-30 parts of germanized kaolin, 18-25 parts of germanized sericite, 12-15 parts of shale, 15-20 parts of andalusite, 5-10 parts of zirconia, 6-8 parts of alumina and 3-5 parts of magnesia;
the egg white glaze is prepared from the following raw materials in parts by weight: 30-40 parts of germanized potassium feldspar, 15-20 parts of zirconite, 18-25 parts of germanized sericite, 8-12 parts of zinc oxide, 4-7 parts of zirconium silicate, 1-3 parts of cerium dioxide and 6-8 parts of frit;
the preparation method comprises the following steps:
weighing and proportioning the blank body and the egg white glaze according to a raw material formula, respectively crushing, mixing and performing wet ball milling on the raw materials to prepare blank slurry and glaze slurry;
step two, the prepared blank slurry and glaze slurry are subjected to multiple deironing by a magnetic separator until the iron content of the blank slurry is lower than 0.05%;
step three, preparing the blank slurry into a ceramic blank, feeding the ceramic blank into a kiln, and biscuiting for 6-7 hours at 850-920 ℃ to obtain a biscuit;
step four, applying glaze slurry on the surface of the biscuit, after the glaze slurry on the surface of the biscuit is dried, sending the ceramic biscuit into a kiln, and firing and forming at the firing temperature of 1320-1380 ℃ in a reducing atmosphere;
the chemical composition of the green body is as follows: siO 2 2 ：40.6-44.3％、Al 2 O 3 ：32.3-35.2％、CaO：7.2-8.6％、MgO：5.2-6.4％、Na 2 O：3.3-3.9％、K 2 O：1.6-2.5％、Fe 2 O 3 ：0.1-0.16％、ZrO 2 ：1.6-2.3％、I.L：1.7-3.04％；
In the fourth step, the firing is specifically controlled as follows:
and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 420-450 ℃, and burning for 1-2h under heat preservation;
and (3) decomposition and oxidation stage: heating to 860-920 ℃ in the kiln, and keeping the temperature for firing for 3.5-4.5 hours;
and (3) reduction stage: continuously heating to 1280-1350 ℃ in the kiln, and keeping the temperature for firing for 4-6h;
and (3) a high-temperature firing stage: controlling the temperature in the kiln at 1320-1380 ℃, and keeping the temperature for firing for 2-4 hours;
and (3) natural cooling: cooling the mixture in the kiln to room temperature, and prolonging the cooling time to more than 10 hours.
2. The high-strength light egg white enamel according to claim 1, wherein: the frit comprises the following chemical components: siO 2 2 ：46.8-53.4％、Al 2 O 3 ：20.6-27.6％、K 2 O：8.2-10.3％、Na 2 O：5.4-6.8％、CaO：1.6-2.4％、MgO：2.7-3.5％、ZnO：1.6-3.4％、TiO 2 ：2.5-3.2％。
3. The high-strength light egg white enamel porcelain according to claim 1, wherein: in the reduction stage of the fourth step, the content of carbon monoxide is 5.4-5.9%, and the content of oxygen is 1.1-1.5%.
4. The high-strength light egg white enamel according to claim 1, wherein: in the high-temperature sintering stage of the fourth step, the content of carbon monoxide is 8.6-9.7%, and the content of oxygen is 0.1-0.18%.
5. The high-strength light egg white enamel according to claim 1, wherein: in the first step, when wet ball milling is carried out on the blank slurry, the raw materials are wet-milled for 18-24 hours in a ball mill, the milling medium is water, and the raw materials: ball: water = 1.2-1.5.
6. The high-strength light egg white enamel according to claim 1, wherein: in the first step, when wet ball milling is carried out on the glaze slip, the raw materials are ground in a ball mill for 36-42 hours by a wet method, the grinding medium is water, and the raw materials: ball: water = 1.8-2.2.
7. The high-strength light egg white enamel according to claim 1, wherein: in the fourth step, the glazing mode of the glaze slurry is glaze spraying or glaze pouring.
8. The high-strength light egg white enamel according to claim 1, wherein: in the second step, the intensity of the magnetic separator is 18000-20000GS.
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