CN113998985A - Light-transmitting rock plate blank, light-transmitting rock plate and preparation method and application thereof - Google Patents

Light-transmitting rock plate blank, light-transmitting rock plate and preparation method and application thereof Download PDF

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CN113998985A
CN113998985A CN202210002152.XA CN202210002152A CN113998985A CN 113998985 A CN113998985 A CN 113998985A CN 202210002152 A CN202210002152 A CN 202210002152A CN 113998985 A CN113998985 A CN 113998985A
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rock plate
light
transmitting
blank
white
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CN113998985B (en
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吴泽秋
刘健康
赵汉明
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Guangdong Xinwanhe New Technology Material Co ltd
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Guangdong Xinwanhe New Technology Material Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
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    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/86—Glazes; Cold glazes
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3436—Alkaline earth metal silicates, e.g. barium silicate
    • C04B2235/3454—Calcium silicates, e.g. wollastonite
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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    • C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/40—Metallic constituents or additives not added as binding phase
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Abstract

A light-transmitting rock plate blank, a light-transmitting rock plate and a preparation method and application thereof relate to the technical field of light-transmitting rock plates, and the light-transmitting rock plate blank comprises the following raw materials: 20-25% of ultra-white mixed soil CK95, 37-43% of albite, 24-28% of frit, 8-12% of wollastonite and 1-4% of raw aluminum; the green brick of the transparent rock plate is prepared from the transparent rock plate blank; the preparation method is respectively used for preparing the light-transmitting rock plate blank and the light-transmitting rock plate; this scheme provides a printing opacity rock plate blank, it is through introducing super white clay CK95, combine albite, the frit, wollastonite and raw aluminium to make, can realize the effect of high whiteness degree, high printing opacity and high strength, can have the characteristics that the firing deformation is little and the cutting is difficult for breakage again, it is difficult to realize the problem that high transmittance, high strength, low firing deformation and cutting performance have simultaneously effectively to have solved ceramic rock plate, but the replacement nature stone material has under high-end scene to this scheme.

Description

Light-transmitting rock plate blank, light-transmitting rock plate and preparation method and application thereof
Technical Field
The invention relates to the technical field of light-transmitting rock plates, in particular to a light-transmitting rock plate blank, a light-transmitting rock plate and a preparation method and application thereof.
Background
In recent years, ceramic rock plates have been popular in the market due to their high strength, good hardness, and strong decorative effect. The ceramic rock plate can be applied to conventional wall and floor decoration, and can also be used as a table top, a cabinet door, a drawer door, a screen and the like. Compared with natural stone, the most obvious defect of the ceramic rock plate is that the permeability is poor, and the common ceramic rock plate is almost opaque; this results in a ceramic slate that is less substitutable for natural stone in high-end scenarios. Meanwhile, the existing ceramic rock plate is difficult to realize the simultaneous combination of high transmittance, high strength, low sintering deformation and cutting performance, so that the ceramic rock plate can not replace natural stone.
Disclosure of Invention
The invention aims to provide a light-transmitting rock plate blank which is prepared by introducing super-white mixed soil CK95 and combining albite, frit, wollastonite and raw aluminum, can realize the effects of high whiteness, high light transmission and high strength, and has the characteristics of small firing deformation and difficult breakage in cutting.
The invention also provides a preparation method of the light-transmitting rock plate blank, which is used for preparing the light-transmitting rock plate blank.
The invention also provides a light-transmitting rock plate, and a brick blank of the light-transmitting rock plate is prepared from the light-transmitting rock plate blank.
The invention also provides a preparation method of the light-transmitting rock plate, which is used for preparing the light-transmitting rock plate.
The invention also provides application of the light-transmitting rock plate blank in preparation of the light-transmitting rock plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a light-transmitting rock plate blank comprises the following raw materials in percentage by mass: 20-25% of ultra-white mixed soil CK95, 37-43% of albite, 24-28% of frit, 8-12% of wollastonite and 1-4% of raw aluminum;
the preparation process of the ultrawhite mixed soil CK95 comprises the following steps:
1) adding the high-white kaolin into the dispersant slurry, sieving, grinding, dispersing, and performing high-purification magnetic separation by using a magnetic separator to obtain ultra-white kaolin ore slurry;
2) adding the high-whiteness bentonite into the dispersant slurry, sieving, grinding, dispersing, and performing high-purification magnetic separation by a magnetic separator to obtain ultra-white bentonite slurry;
3) mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2), concentrating, and performing filter pressing to obtain a filter cake;
4) and (3) performing a milling treatment on the filter cake obtained in the step 3) to obtain the ultra-white mixed soil CK 95.
Preferably, in the preparation process of the ultrawhite mixed soil CK95, in the step 1), high white kaolin is added into the dispersant slurry, is sieved by a 325-mesh sieve and is pumped into a nano sand mill for grinding, and the grinding fineness is controlled to be that the particle size D50 is not more than 4 μm; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator;
step 2), adding the high-whiteness bentonite into the dispersing agent slurry, sieving by using a 325-mesh sieve, and pumping into a nano sand mill for grinding, wherein the grinding fineness is controlled to be that the particle size D50 is not more than 4 mu m; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator.
Preferably, the chemical components comprise the following components in percentage by mass: 60-65% of SiO220 to 24% of Al2O30 to 0.1% of Fe2O30 to 0.04% of TiO24-8% CaO, 0-2% MgO, 0-1% K2O, 4-8% of Na2O and 2-4% loss on ignition.
Preferably, in the preparation process of the ultrawhite soil mixture CK95, the magnetic field strength required by the high-purification magnetic separation in the step 1) and/or the step 2) is not lower than 5T.
Preferably, the frit comprises 52-55% of SiO in terms of chemical composition by mass percentage225 to 29% of Al2O30 to 0.05% of Fe2O30 to 0.02% of TiO25-9% CaO, 0-3% MgO, 0-2% K2O, 6-10% of Na2O and the balance loss on ignition; the melt isThe firing temperature of the block is 1450-1550 ℃.
Preferably, the wollastonite comprises 1% or less of MgO in chemical components in percentage by mass; the whiteness of the wollastonite is more than or equal to 85 degrees.
A preparation method of a light-transmitting rock plate blank is used for preparing the light-transmitting rock plate blank and comprises the following steps:
step (1): weighing the materials of the blank of the transparent rock plate except the ultrawhite mixed soil CK95, putting the materials into a ball mill, adding a grinding aid and water, and ball-milling until the fineness of 250 meshes reaches 1%;
and (2) adding the ultra-white mixed soil CK95, the water glass and the water reducing agent, and continuing ball milling.
And (3): and (3) carrying out spray granulation on the blank slurry subjected to ball milling in the step (2) to obtain the light-transmitting rock plate blank.
Preferably, in the step (1), the grinding aid is sodium carboxymethyl cellulose;
the substitution degree of the sodium carboxymethylcellulose is more than or equal to 1.3, and the viscosity of a 1% aqueous solution thereof is less than or equal to 50 cps.
A brick blank of the light-transmitting rock plate is prepared from the light-transmitting rock plate blank.
A preparation method of a light-transmitting rock plate comprises the following steps:
s1: pressing and forming the transparent rock plate blank prepared by the preparation method of the transparent rock plate blank to obtain a rock plate brick blank;
s2: drying the rock plate green brick and then performing surface modification;
s3: firing and forming in a kiln at the firing temperature of 1160-1220 ℃;
s4: and (5) taking out of the kiln, and polishing according to actual needs to obtain the light-transmitting rock plate.
The application of the light-transmitting rock plate blank in preparing the light-transmitting rock plate is disclosed.
The technical scheme provided by the invention can have the following beneficial effects:
this scheme provides a printing opacity rock plate blank, it is through introducing super white clay CK95, combine albite, the frit, wollastonite and raw aluminium to make, can realize the effect of high whiteness degree, high printing opacity and high strength, can have the characteristics that the firing deformation is little and the cutting is difficult for breakage again, it is difficult to realize high printing opacity, high strength effectively to have solved ceramic rock plate, the problem that the firing deformation and cutting performance had simultaneously, but the order scheme has the substitutability to natural stone under high-end scene.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present solution is further explained by the following specific embodiments.
A light-transmitting rock plate blank comprises the following raw materials in percentage by mass: 20-25% of ultra-white mixed soil CK95, 37-43% of albite, 24-28% of frit, 8-12% of wollastonite and 1-4% of raw aluminum;
the preparation process of the ultrawhite mixed soil CK95 comprises the following steps:
1) adding the high-white kaolin which is subjected to classification, impurity removal and acid washing into the dispersant slurry, screening, grinding and dispersing, and then carrying out high-purification magnetic separation by a magnetic separator to obtain ultra-white kaolin ore pulp;
fe of treated ultra-white kaolin2O3Less than 0.03%, TiO2Less than 0.02%, and both dry and wet whiteness in excess of 90. Grinding the kaolin to reduce the fineness can improve the plasticity of the kaolin on one hand, and can expose more impurities contained in the kaolin on the other hand, thereby improving the subsequent magnetic separation effect. The dispersion is carried out by utilizing ultrasonic waves, so that the agglomeration among kaolin particles can be greatly reduced, and the subsequent magnetic separation impurity removal effect is ensured.
2) Adding the high-whiteness bentonite into the dispersant slurry, sieving, grinding, dispersing, and performing high-purification magnetic separation by a magnetic separator to obtain ultra-white bentonite slurry;
fe of treated ultra-white bentonite2O3Less than 0.04%, TiO2Less than 0.02%, and both dry and wet whiteness in excess of 80%.
3) Mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2) according to the weight ratio of dry materials (0.1-10): 1, mixing, concentrating, and performing filter pressing to obtain a filter cake; the water content of the filter cake is controlled to be 30-35%.
4) Performing milling processing on the filter cake obtained in the step 3), wherein milling time is 6-8 h, the milling process can improve the combination degree of the ultra-white kaolin and the ultra-white bentonite on one hand, and can improve the particle appearance and the particle grade structure of the soil ore on the other hand, the particle appearance is changed into a spherical shape unlike a ball milling process, or the firing shrinkage is too large due to too fine particles, and the strength of the mixed soil is further improved by the milling process. After mechanical grinding treatment, the ultra-white mixed soil CK95 with the drying strength of more than 8Mpa is obtained.
The scheme provides a light-transmitting rock plate blank, which is prepared by introducing super-white mixed soil CK95 and combining albite, frit, wollastonite and raw aluminum, can realize the effects of high whiteness, high light transmission and high strength, and has the characteristics of small firing deformation and difficult breakage in cutting, the problem that the ceramic rock plate is difficult to realize high light transmission, high strength, firing deformation and cutting performance cannot be simultaneously combined is effectively solved, and the scheme can replace natural stone materials in high-end scenes.
Preferably, in the preparation process of the ultrawhite mixed soil CK95, in the step 1), high white kaolin is added into the dispersant slurry, is sieved by a 325-mesh sieve and is pumped into a nano sand mill for grinding, and the grinding fineness is controlled to be that the particle size D50 is not more than 4 μm; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator;
step 2), adding the high-whiteness bentonite into the dispersing agent slurry, sieving by using a 325-mesh sieve, and pumping into a nano sand mill for grinding, wherein the grinding fineness is controlled to be that the particle size D50 is not more than 4 mu m; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator.
Preferably, the chemical components comprise the following components in percentage by mass: 60-65% ofSiO220 to 24% of Al2O30 to 0.1% of Fe2O30 to 0.04% of TiO24-8% CaO, 0-2% MgO, 0-1% K2O, 4-8% of Na2O and 2-4% loss on ignition.
Preferably, in the preparation process of the ultrawhite soil mixture CK95, the magnetic field strength required by the high-purification magnetic separation in the step 1) and/or the step 2) is not lower than 5T.
Preferably, the frit comprises 52-55% of SiO in terms of chemical composition by mass percentage225 to 29% of Al2O30 to 0.05% of Fe2O30 to 0.02% of TiO25-9% CaO, 0-3% MgO, 0-2% K2O, 6-10% of Na2O and the balance loss on ignition; the firing temperature of the frit is 1450-1550 ℃.
The frit can also be replaced by the existing frit; preferably, the frit system can improve the sintering deformation and cutting performance of the transparent rock plate and prevent the roller sticking problem of the transparent rock plate green body in the high-temperature sintering process.
Preferably, the wollastonite comprises 1% or less of MgO in chemical components in percentage by mass; the whiteness of the wollastonite is more than or equal to 85 degrees.
The introduction of more wollastonite can promote the generation of anorthite crystals in the formula, thereby not only increasing the transmittance, but also improving the toughness of the sintered blank. Meanwhile, if the content of MgO in the wollastonite in the respective examples is too high, the problem of sticking a roll bar during firing of the transparent rock plate and the problem of deformation after firing are easily caused, and therefore, the content of MgO in the wollastonite needs to be strictly controlled to further improve the performance.
A preparation method of a light-transmitting rock plate blank is used for preparing the light-transmitting rock plate blank and comprises the following steps:
step (1): weighing the materials of the blank of the transparent rock plate except the ultrawhite mixed soil CK95, putting the materials into a ball mill, adding a grinding aid and water, and performing ball milling until the fineness of 250 meshes reaches 1% by properly controlling the solid content in the ball mill to be 66% -71%;
and (3) adding the ultra-white mixed soil CK95, the water glass and the water reducing agent, and continuing ball milling for 1 h.
The reason why the ultra-white mixed soil CK95 is thrown separately from other raw materials is that the fineness of the ultra-white mixed soil CK95 per se meets the use requirement, and excessive ball milling can lead to further reduction of particles and increase of shrinkage on one hand, and lead the appearance of the particles to be round on the other hand, thus reducing the plasticity and strength of the particles.
And (3): and (3) carrying out spray granulation on the blank slurry subjected to ball milling in the step (2) to obtain the light-transmitting rock plate blank.
After ball milling, conventional screening, primary impurity removal (mainly iron removal), ageing and secondary impurity removal can be carried out, and then spray granulation is carried out.
Preferably, in the step (1), the grinding aid is sodium carboxymethyl cellulose;
the substitution degree of the sodium carboxymethylcellulose is more than or equal to 1.3, and the viscosity of a 1% aqueous solution thereof is less than or equal to 50 cps.
The grinding aid is replaced by the existing grinding aid. Preferably, the present protocol uses sodium carboxymethylcellulose; the addition amount of the sodium carboxymethylcellulose can be determined according to actual conditions, and is preferably 0.1-0.4% of the total mass of dry materials. The sodium carboxymethyl cellulose can be used as a reinforcing agent and a grinding aid, and can ensure that the sodium carboxymethyl cellulose cannot deteriorate in the preparation and use processes of blanks under the conditions that the substitution degree is more than or equal to 1.3 and the viscosity of a 1% aqueous solution is less than 50cps, thereby avoiding the problem that the strength is reduced due to deterioration commonly existing in the conventional blank reinforcing agent.
A light-transmitting rock plate is prepared from the light-transmitting rock plate blank.
A preparation method of a light-transmitting rock plate comprises the following steps:
s1: pressing and forming the transparent rock plate blank prepared by the preparation method of the transparent rock plate blank to obtain a rock plate brick blank;
s2: drying the rock plate green brick and then performing surface modification;
the surface modification is a known process and comprises at least one of spraying digital glaze, spraying digital pigment ink, spraying dry granular glaze or spraying and polishing glaze;
s3: firing and forming in a kiln at the firing temperature of 1160-1220 ℃ for 55-100 min;
s4: and (5) taking out of the kiln, and polishing according to actual needs to obtain the light-transmitting rock plate.
The application of the light-transmitting rock plate blank in preparing the light-transmitting rock plate is disclosed.
And (3) performance testing:
whiteness: and (3) carrying out whiteness test on the light-transmitting rock plate blank according to GB/T26742-2011 raw material clay for building sanitary ceramics.
Transmittance: the transmittance of the transparent rock plate is tested according to GB/T3296 + 2021 daily porcelain transmittance determination method.
Green strength: and (3) carrying out a flexural strength test on the light-transmitting rock plate blank according to GB/T26742-2011 raw material clay for building sanitary ceramics.
Modulus of rupture: the modulus of rupture was tested on the transparent rock panels according to GB/T3810.4-2006 ceramic tile test method part 4 determination of modulus of rupture and failure Strength. And (3) breakage of the green body: and (4) wiring the pressed light-transmitting rock plate green bricks on a production line, and observing whether the pressed light-transmitting rock plate green bricks are damaged or not.
Cutting performance: and cutting the sintered transparent rock plate into thin strips with the width of 10mm by using a cutting machine, wherein the cutting performance is qualified if no crack is generated.
Example A
Example a 1:
a light-transmitting rock plate blank comprises the following chemical components in percentage by mass: 61.72% SiO220.63% of Al2O30.04% of Fe2O30.03% of TiO27.03 percent of CaO, 0.72 percent of MgO and 0.66 percent of K2O, 5.92% of Na2O and loss of balance on ignition;
the light-transmitting rock slab comprises the following raw material components in percentage by mass: 22% of ultra-white clay CK95, 39% of albite, 26% of frit, 12% of wollastonite and 1% of raw aluminum.
The ultra-white mixed soil CK95 is produced by the following steps:
1) adding the high-white kaolin which is subjected to classification, impurity removal and acid washing into the dispersant slurry, sieving the high-white kaolin with a 325-mesh sieve, pumping the high-white kaolin into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 microns, further dispersing and activating the high-white kaolin with an ultrasonic dispersion machine, pumping the high-white kaolin into a superconducting magnetic separator with the magnetic field intensity of 5T for high-purification magnetic separation, and obtaining ultra-white kaolin ore pulp;
2) adding the high-whiteness bentonite into the dispersant slurry, sieving with a 325-mesh sieve, pumping into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 micrometers, further dispersing and activating by an ultrasonic dispersion machine, pumping into a superconducting magnetic separator with the magnetic field intensity of 5T for high-purification magnetic separation, and obtaining the ultra-white bentonite slurry;
3) mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2) according to a dry material weight ratio of 10: 1, concentrating, and performing filter pressing to obtain a filter cake, wherein the water content of the filter cake is controlled to be 35%.
4) Performing milling processing on the filter cake obtained in the step 3), wherein the milling time is 8 h. After mechanical grinding treatment, the ultra-white mixed soil CK95 is obtained, and the drying strength is 8.1 MPa.
The frit comprises the following chemical components in percentage by mass: 54.41% SiO225.59% of Al2O30.03% of Fe2O30.02% of TiO27.91% of CaO, 1.78% of MgO and 0.93% of K2O, 9.15% of Na2O and the balance loss on ignition; firing at 1470 ℃;
wollastonite, wherein the chemical components of the wollastonite comprise MgO =0.8% by mass; whiteness of wollastonite =85 °;
the preparation method of the light-transmitting rock plate comprises the following steps:
1) weighing raw materials of a blank of the transparent rock plate except for the ultra-white mixed soil CK95, putting the raw materials into a ball mill, adding sodium carboxymethylcellulose accounting for 0.3% of the total mass of dry materials as a reinforcing agent and a grinding aid, adding a proper amount of water, controlling the solid content in the ball mill at 69% -70%, ball-milling until the fineness of 250 meshes reaches 1%, stopping ball-milling, adding the ultra-white mixed soil CK95, water, a proper amount of water glass and a water reducing agent, and continuing ball-milling for 1 h; the degree of substitution of sodium carboxymethylcellulose is 1.35 and the viscosity of a 1% aqueous solution is 45 cps.
2) And (3) sieving the ball-milled blank slurry to remove iron, ageing, removing iron for the second time, and then carrying out spray granulation to obtain the transparent rock plate blank powder.
3) Pressing and molding the powder obtained in the step 2) by using a die press to obtain a rock plate green brick, drying, printing with pigment ink, and spraying protective glaze.
4) Firing and forming in a kiln at 1180 ℃ for 100 min.
5) And taking out of the kiln to obtain the light-transmitting rock plate.
Example a 2:
a light-transmitting rock plate blank comprises the following chemical components in percentage by mass: 61.13% SiO222.21% of Al2O30.04% of Fe2O30.02% of TiO26.40 percent of CaO, 0.76 percent of MgO and 0.98 percent of K2O, 4.32% of Na2O and loss of balance on ignition;
the light-transmitting rock slab comprises the following raw material components in percentage by mass: 21% of ultra-white clay CK95, 43% of albite, 24% of frit, 9% of wollastonite and 3% of raw aluminum.
The ultra-white mixed soil CK95 is produced by the following steps:
1) adding the high-white kaolin which is subjected to classification, impurity removal and acid washing into the dispersant slurry, sieving the high-white kaolin with a 325-mesh sieve, pumping the high-white kaolin into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 microns, further dispersing and activating the high-white kaolin with an ultrasonic dispersion machine, pumping the high-white kaolin into a superconducting magnetic separator with the magnetic field intensity of 5T for high-purification magnetic separation, and obtaining ultra-white kaolin ore pulp;
2) adding the high-whiteness bentonite into the dispersant slurry, sieving with a 325-mesh sieve, pumping into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 micrometers, further dispersing and activating by an ultrasonic dispersion machine, pumping into a superconducting magnetic separator with the magnetic field intensity of 5T for high-purification magnetic separation, and obtaining the ultra-white bentonite slurry;
3) mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2) according to a dry material weight ratio of 8: 1, concentrating, and performing filter pressing to obtain a filter cake, wherein the water content of the filter cake is controlled to be 33%.
4) Performing milling processing on the filter cake obtained in the step 3), wherein the milling time is 8 h. After mechanical grinding treatment, the ultra-white mixed soil CK95 is obtained, and the drying strength is 8.8 Mpa.
The frit comprises the following chemical components in percentage by mass: 53.50% SiO228.01% of Al2O30.04% of Fe2O30.01% of TiO27.03 percent of CaO, 1.98 percent of MgO and 0.99 percent of K2O, 8.28% of Na2O and the balance loss on ignition; firing at 1480 ℃;
wollastonite, wherein the chemical components of the wollastonite comprise MgO =0.8% by mass; whiteness of wollastonite =88 °;
the preparation method of the light-transmitting rock plate comprises the following steps:
1) weighing raw materials of a blank of the transparent rock plate except for the ultra-white mixed soil CK95, putting the raw materials into a ball mill, adding sodium carboxymethylcellulose accounting for 0.3% of the total mass of dry materials as a reinforcing agent and a grinding aid, adding a proper amount of water, controlling the solid content in the ball mill at 70% -71%, ball-milling until the fineness of 250 meshes reaches 1%, stopping ball-milling, adding the ultra-white mixed soil CK95, water, a proper amount of water glass and a water reducing agent, and continuing ball-milling for 1 h; the degree of substitution of sodium carboxymethylcellulose was 1.32 and the viscosity of a 1% aqueous solution was 47 cps.
2) And (3) sieving the ball-milled blank slurry to remove iron, ageing, removing iron for the second time, and then carrying out spray granulation to obtain the transparent rock plate blank powder.
3) Pressing and molding the powder obtained in the step 2) by using a die press to obtain a rock plate green brick, drying, printing with pigment ink, and spraying protective glaze.
4) And (3) firing and forming in a kiln at a firing temperature of 1205 ℃ for 90 min.
5) And taking out of the kiln to obtain the light-transmitting rock plate.
Example a 3:
a light-transmitting rock plate blank comprises the following chemical components in percentage by mass: 64.01% SiO220.76% of Al2O30.01% of Fe2O30.02% of TiO25.66 percent of CaO, 1.87 percent of MgO and 7.48 percent of Na2O and loss of balance on ignition;
the light-transmitting rock slab comprises the following raw material components in percentage by mass: 25% of ultra-white clay CK95, 37% of albite, 28% of frit, 8% of wollastonite and 2% of raw aluminum.
The ultra-white mixed soil CK95 is produced by the following steps:
1) adding the high-whiteness kaolin which is subjected to classification, impurity removal and acid washing into the dispersing agent slurry, sieving the high-whiteness kaolin with a 325-mesh sieve, pumping the high-whiteness kaolin into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 microns, further dispersing and activating the high-whiteness kaolin with an ultrasonic dispersing machine, pumping the high-whiteness kaolin into a superconducting magnetic separator with the magnetic field intensity of 5.5T for high-purification magnetic separation, and obtaining ultra-whiteness kaolin ore pulp;
2) adding the high-whiteness bentonite into the dispersant slurry, sieving with a 325-mesh sieve, pumping into a nano sand mill for grinding, controlling the grinding fineness to be that the particle size D50 is less than or equal to 4 micrometers, further dispersing and activating by an ultrasonic dispersion machine, pumping into a superconducting magnetic separator with the magnetic field intensity of 5.5T for high-purification magnetic separation, and obtaining the ultra-white bentonite slurry;
3) mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2) according to the dry material weight ratio of 9: 1, concentrating, and performing filter pressing to obtain a filter cake, wherein the water content of the filter cake is controlled at 30%.
4) Performing milling processing on the filter cake obtained in the step 3), wherein the milling time is 8 h. After mechanical grinding treatment, the ultra-white mixed soil CK95 is obtained, and the drying strength is 8.4 Mpa.
The frit comprises the following chemical components in percentage by mass: 53.30% SiO228.99% Al2O30.01% of Fe2O30.01% of TiO28.62 percent of CaO and 0.05 percent of K2O, 6.35% of Na2O and the balance loss on ignition; firing at 1550 ℃;
wollastonite, wherein the chemical components of the wollastonite comprise MgO =1.0% by mass; whiteness of wollastonite =87 °;
the preparation method of the light-transmitting rock plate comprises the following steps:
1) weighing raw materials of a blank of the transparent rock plate except for the ultra-white mixed soil CK95, putting the raw materials into a ball mill, adding sodium carboxymethylcellulose accounting for 0.4% of the total mass of dry materials as a reinforcing agent and a grinding aid, adding a proper amount of water, controlling the solid content in the ball mill to be 69-70%, ball-milling until the fineness of 250 meshes reaches 1%, stopping ball-milling, adding the ultra-white mixed soil CK95 and a proper amount of water glass and a water reducing agent, and continuing ball-milling for 1 h; the degree of substitution of sodium carboxymethylcellulose is 1.35 and the viscosity of a 1% aqueous solution is 45 cps.
2) And (3) sieving the ball-milled blank slurry to remove iron, ageing, removing iron for the second time, and then carrying out spray granulation to obtain the transparent rock plate blank powder.
3) Pressing and molding the powder obtained in the step 2) by using a die press to obtain a rock plate green brick, drying, printing with pigment ink, and spraying protective glaze.
4) Firing and forming in a kiln at 1180 ℃ for 100 min.
5) And taking out of the kiln to obtain the light-transmitting rock plate.
Comparative example a 1:
comparative example a1 is substantially the same as example a1 except that the chemical composition of the clear rock blank used in comparative example a1 includes: 62.65% SiO219.83% of Al2O30.04% of Fe2O30.03% of TiO27.03 percent of CaO, 0.72 percent of MgO and 0.67 percent of K2O, 6.00% of Na2O and the balance loss on ignition. The raw material components of the light-transmitting rock plate blank are as follows: 22% of ultra-white mixed soil CK95, 40% of albite, 26% of frit and 12% of wollastonite.
Comparative example a 2:
comparative example a2 is substantially the same as example a1 except that comparative example a2 is prepared without milling in the process of preparing ultra white clay CK95 and has a dry strength of 6.6 Mpa.
Comparative example a 3:
comparative example A3 is substantially the same as example a1 except that comparative example A3 in the process for making a clear rock blank, all of the raw materials of the clear rock blank, including ultrawhite clay CK95, were charged together into a ball mill and ball milled.
The examples A1-A3, and comparative examples A1-A3 were tested for performance and the results are shown in Table 1.
TABLE 1 Performance testing of example A
Figure 360394DEST_PATH_IMAGE001
Description of the drawings:
1. as is clear from the comparison of example A1 with comparative example A1, the raw material of the clear rock blank used in comparative example A1 is different from that of example A1, and raw aluminum is not used in comparative example A1; the green aluminum can effectively improve the modulus of rupture and the cutting performance of the green brick in the scheme; the modulus of rupture and the cutting performance of comparative example A1 were reduced relative to example A1, the modulus of rupture was only 40MPa, and the cutting performance was unacceptable. Therefore, the raw aluminum added in the scheme can effectively improve the modulus of rupture and the cutting performance so as to solve the problem of the cutting performance of the light-transmitting rock plate.
2. Comparing the example A1 with the comparative example A2, the comparative example A2 does not need to be milled in the preparation process of the ultra-white mixed soil CK95, which can lead to the strength reduction of the ultra-white mixed soil CK95, namely, the strength is only 6.6 MPa; on the other hand, the low-strength ultra-white mixed soil CK95 can cause the final strength of the transparent rock plate to be reduced; the mechanical milling process can improve the combination degree of the ultra-white kaolin and the ultra-white bentonite and can also improve the particle appearance and the particle grade structure of the soil ore. Thus, the green strength of comparative example A2 decreased, being only 1.8 MPa. Therefore, the preparation process of the ultrawhite mixed soil CK95 is mechanically milled, so that the strength of the transparent rock plate can be further improved, and the problem that the green strength and high light transmittance of the transparent rock plate cannot be compatible is solved.
3. As can be seen from the comparison of example A1 with comparative example A3, comparative example A3 is a process in which all the raw materials including the ultra-white clay CK95 of the transparent rock plate blank are put together in a ball mill and ball-milled; in the scheme, because the fineness of CK95 reaches the use requirement, excessive ball milling can lead to further reduction of particles and increase shrinkage on one hand, and lead to the appearance of the particles to be round and reduce the plasticity and strength of the particles on the other hand. Thus, the green strength and the cutting performance of comparative example A3 were both reduced, the green strength was only 1.9MPa, and the cutting performance was off-specification. Therefore, the ultrawhite mixed soil CK95 used in the scheme is not suitable for being ball-milled with other raw materials, and the problem that the green strength and the cutting performance are simultaneously reduced can be avoided.
Example B
Example B1:
example B1 is substantially the same as example a1 except that the frit used in the clear rock blank differs from the frit used in example B1, which comprises the following chemical components in mass percent: 62.62 SiO215.37% of Al2O30.02 Fe2O30.01% TiO215.2% of CaO, 2.1% of MgO and 2.3% of K2O, 2.2% of Na2O and the balance loss on ignition.
Example B2:
example B2 is essentially the same as example A1 except that the superconducting magnetic separator has a magnetic field strength of only 4.5T.
Example B3:
example B3 is essentially the same as example a1 except that the wollastonite, example B3, has a chemical composition of MgO =0.8% by weight and has a whiteness of 80 °.
Comparative example B1:
comparative example B1 is substantially the same as example a1 except that comparative example B1 uses high white kaolin and high white bentonite instead of ultrawhite bentonite CK 95; comparative example B1 comprises the following raw materials in percentage by mass: 18% high white kaolin, 4% high white bentonite, 39% albite, 26% frit, 12% wollastonite and 1% raw aluminum.
Example B was tested for performance as in table 2.
TABLE 2 Performance testing of example B
Figure 543113DEST_PATH_IMAGE002
Description of the drawings:
1. as can be seen from a comparison of example A1 with example B1, the frit of example B1 is now availableIn contrast to the frit used in example a1, the use of the frit of example a1 resulted in a higher transparency (difference of 7.3%) and a better modulus of rupture (difference of 4 Mpa) of the final transparent rock plate; therefore, the use scheme is that the coating is prepared from 52-55% of SiO225 to 29% of Al2O30 to 0.05% of Fe2O30 to 0.02% of TiO25-9% CaO, 0-3% MgO, 0-2% K2O, 6-10% of Na2And the frit consisting of O and the balance loss on ignition can effectively improve the transmittance and the modulus of rupture of the transparent rock plate, and is the optimal embodiment.
2. As can be seen from the comparison between the example A1 and the example B2, the magnetic field intensity of the magnetic separator in the example B2 is only 4.5T, which causes the whiteness of the transparent rock plate to be reduced, and the transmittance is reduced along with the reduction. This indicates that the impurities can be removed only by enough magnetic field intensity, and the whiteness and the transmittance of the transparent rock plate are ensured.
3. As can be seen from the comparison between example A1 and example B3, the whiteness of wollastonite in example B3 is lower than 85 °, which also results in the reduction of the whiteness of the final transparent rock plate. It is stated that the whiteness of wollastonite also affects the whiteness of the final transparent rock plate.
4. From example a1 in comparison with comparative example B1, comparative example B1 did not further form ultrawhite hybrid CK95, which is only a single high-white bentonite and ultrawhite bentonite, from high-white kaolin and high-white bentonite; on one hand, the ultra-white mixed soil CK95 prepared by the scheme needs to carry out grinding, high-purification magnetic separation, pulping, concentration, filter pressing and mechanical grinding on the high-white bentonite and the ultra-white bentonite; can improve the plasticity, strength, sintering whiteness, transparency and cutting performance of the green body of the transparent rock plate. The comparative example B1 clearly uses a single high-white kaolin and high-white bentonite which can not replace the ultra-white clay CK95, and the transmittance, green strength, modulus of rupture, firing deformation and cutting performance of the comparative example B1 are all inferior to those of the example A1, the transmittance is only 3.8%, the green strength is only 1.5MPa, the modulus of rupture is only 35 MPa, and the green body is easy to break and the cutting is easy to break.
The technical principle of the present solution is described above with reference to specific embodiments. These descriptions are only used to explain the principles of the present solution and should not be interpreted in any way as limiting the scope of the present solution. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present solution without any inventive effort, which would fall within the scope of the present solution.

Claims (11)

1. The light-transmitting rock slab blank is characterized by comprising the following raw materials in percentage by mass: 20-25% of ultra-white mixed soil CK95, 37-43% of albite, 24-28% of frit, 8-12% of wollastonite and 1-4% of raw aluminum;
the preparation process of the ultrawhite mixed soil CK95 comprises the following steps:
1) adding the high-white kaolin into the dispersant slurry, sieving, grinding, dispersing, and performing high-purification magnetic separation by using a magnetic separator to obtain ultra-white kaolin ore slurry;
2) adding the high-whiteness bentonite into the dispersant slurry, sieving, grinding, dispersing, and performing high-purification magnetic separation by a magnetic separator to obtain ultra-white bentonite slurry;
3) mixing the ultra-white kaolin ore pulp obtained in the step 1) and the ultra-white bentonite ore pulp obtained in the step 2), concentrating, and performing filter pressing to obtain a filter cake;
4) and (3) performing a milling treatment on the filter cake obtained in the step 3) to obtain the ultra-white mixed soil CK 95.
2. The light-transmitting rock plate blank as claimed in claim 1, wherein in the preparation process of the ultra-white mixed soil CK95, in the step 1), high-white kaolin is added into the dispersant slurry, is sieved by a 325-mesh sieve and is pumped into a nano sand mill for grinding, and the grinding fineness is controlled to be the particle size D50 not more than 4 μm; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator;
step 2), adding the high-whiteness bentonite into the dispersing agent slurry, sieving by using a 325-mesh sieve, and pumping into a nano sand mill for grinding, wherein the grinding fineness is controlled to be that the particle size D50 is not more than 4 mu m; further dispersing by an ultrasonic dispersing machine and then introducing into a magnetic separator.
3. A light-transmitting rock plate blank according to claim 1, characterized in that its chemical composition comprises, in mass%: 60-65% of SiO220 to 24% of Al2O30 to 0.1% of Fe2O30 to 0.04% of TiO24-8% CaO, 0-2% MgO, 0-1% K2O, 4-8% of Na2O and 2-4% loss on ignition.
4. A transparent rock plate blank according to any one of claims 1-3, wherein in the process for preparing the ultra-white soil mixture CK95, the magnetic field strength required for the high-purification magnetic separation in step 1) and/or step 2) is not less than 5T.
5. A transparent rock plate blank according to any one of claims 1-3, wherein said frit comprises a chemical composition comprising 52-55% by mass of SiO225 to 29% of Al2O30 to 0.05% of Fe2O30 to 0.02% of TiO25-9% CaO, 0-3% MgO, 0-2% K2O, 6-10% of Na2O and the balance loss on ignition; the firing temperature of the frit is 1450-1550 ℃.
6. A transparent rock plate blank according to any one of claims 1-3, characterized in that wollastonite has a chemical composition of MgO less than or equal to 1% by mass; the whiteness of the wollastonite is more than or equal to 85 degrees.
7. A method for producing a transparent rock blank according to any one of claims 1 to 6, comprising the steps of:
step (1): weighing the materials of the blank of the transparent rock plate except the ultrawhite mixed soil CK95, putting the materials into a ball mill, adding a grinding aid and water, and ball-milling until the fineness of 250 meshes reaches 1%;
adding ultra-white mixed soil CK95, water glass and a water reducing agent, and continuing ball milling;
and (3): and (3) carrying out spray granulation on the blank slurry subjected to ball milling in the step (2) to obtain the light-transmitting rock plate blank.
8. The method for preparing the blank of the transparent rock plate as claimed in claim 7, wherein in the step (1), the grinding aid is sodium carboxymethyl cellulose;
the substitution degree of the sodium carboxymethylcellulose is more than or equal to 1.3, and the viscosity of a 1% aqueous solution thereof is less than or equal to 50 cps.
9. A light-transmitting rock plate, characterized in that the adobe of the light-transmitting rock plate is prepared from the light-transmitting rock plate blank of any one of claims 1-6.
10. The preparation method of the light-transmitting rock plate is characterized by comprising the following steps of:
s1: pressing and forming the light-transmitting rock plate blank prepared by the preparation method of the light-transmitting rock plate blank according to claim 7 or 8 to obtain a rock plate brick blank;
s2: drying the rock plate green brick and then performing surface modification;
s3: firing and forming in a kiln at the firing temperature of 1160-1220 ℃;
s4: and (5) taking out of the kiln, and polishing according to actual needs to obtain the light-transmitting rock plate.
11. Use of a transparent rock blank for the manufacture of a transparent rock plate, characterized in that the transparent rock blank is a transparent rock blank according to any one of claims 1-6.
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