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CN117486225B - Low-viscosity rare earth aluminosilicate and preparation method and application thereof - Google Patents

Low-viscosity rare earth aluminosilicate and preparation method and application thereof Download PDF

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Publication number
CN117486225B
CN117486225B CN202311823890.1A CN202311823890A CN117486225B CN 117486225 B CN117486225 B CN 117486225B CN 202311823890 A CN202311823890 A CN 202311823890A CN 117486225 B CN117486225 B CN 117486225B
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rare earth
grinding
earth aluminosilicate
carbonate
low
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CN117486225A (en
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吴秉政
李璐
王小云
李天明
张瑞森
高淞
阚丽欣
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Tianjin Baogang Rare Earth Research Institute Co Ltd
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Tianjin Baogang Rare Earth Research Institute Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/30—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6
    • C01F17/32—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6 oxide or hydroxide being the only anion, e.g. NaCeO2 or MgxCayEuO
    • C01F17/34—Aluminates, e.g. YAlO3 or Y3-xGdxAl5O12
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/041—Grinding
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/043—Drying, calcination
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/10—Treatment with macromolecular organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM

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  • Wood Science & Technology (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

The invention provides a low-viscosity rare earth aluminosilicate, a preparation method and application thereof, and the raw materials comprise a rare earth carbonate compound and coal gangue, wherein the rare earth carbonate compound accounts for 5-75% of the total mass of the raw materials. The rare earth aluminosilicate of the invention significantly reduces the viscosity of the water-based paint; recycling the lanthanum and cerium rare earth solid waste, and changing waste into valuable; the added value of waste resources gangue is greatly improved, and the waste resources gangue can be applied to the fields of papermaking, spinning, coating and the like after calcination.

Description

Low-viscosity rare earth aluminosilicate and preparation method and application thereof
Technical Field
The invention belongs to the field of coal gangue solid waste utilization, and particularly relates to a low-viscosity rare earth aluminosilicate, and a preparation method and application thereof.
Background
The gangue is solid waste discharged in the coal mining process and the coal washing process, and is a black gray rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process.
Patent application CN114906857B discloses a treatment method of coal gangue and a silica nanosheet, a porous silicate material and iron oxide red prepared from the coal gangue, the method comprises the steps of calcining the coal gangue to obtain layered silicate mineral, then dissolving out metal ions in an octahedral layer of the layered silicate mineral through acid corrosion treatment, retaining the layered structure of the layered silicate mineral to obtain nanosheet silica, and further preparing the rest product of the prepared silica nanosheet into the porous silicate material with high adsorption performance or the iron red with high red degree through co-production, thereby not only improving the utilization value and high value-added conversion of the coal gangue, but also avoiding environmental pollution caused by waste acid and high cost of waste liquid treatment.
At present, the water-based paint in the prior art generally has the technical problem of higher viscosity, and no report of taking coal gangue as a raw material of the water-based paint exists.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and provides a low-viscosity rare earth aluminosilicate, and a preparation method and application thereof.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the low-viscosity rare earth aluminosilicate is prepared from raw materials including rare earth carbonate compounds and coal gangue, wherein the rare earth carbonate compounds account for 5% -75% of the total mass of the raw materials.
Preferably, the gangue comprises the following components in percentage by mass: siO (SiO) 2 29.50%-48.50%，Al 2 O 3 50.22%-69.50%，Fe 2 O 3 ≤0.5%，TiO 2 ≤0.5%。
Preferably, the rare earth carbonate compound is one or a mixture of a plurality of lanthanum carbonate, cerium carbonate and lanthanum cerium carbonate.
Preferably, the rare earth carbonate compound accounts for 50-75% of the total mass of the raw materials.
In a second aspect, the present invention also provides a preparation method of the low-viscosity rare earth aluminosilicate, the preparation method comprising the following steps:
(1) Mixing: mixing and grinding a rare earth carbonate compound and coal gangue;
(2) Calcining: placing the ground material into a corundum crucible, and calcining in a muffle furnace at the calcining temperature of 1000-1400 ℃ for 1-3h;
(3) Wet superfine grinding: carrying out wet superfine grinding on the calcined product, controlling the grain diameter to be D90 less than or equal to 5um after grinding for 2-3 hours, and drying for later use;
(4) And (5) slurry sanding: adding 1.5-2.0 wt% of dispersing agent into the dried product, and putting into a sand mill for sand milling to obtain slurry with D90 less than or equal to 2 um;
(5) And (5) atomizing and drying: and (3) dehydrating and dispersing the slurry in a spray drying mode to obtain the low-viscosity rare earth aluminosilicate.
Preferably, the mixing grinding in the step (1) is one of wet ball milling or dry ball milling; the grinding speed is 150rad/min-450rad/min, and the grinding time is 1h-6 h.
Preferably, the sintering temperature in the calcination in the step (2) is 1150-1300 ℃, the sintering time is 1h-6 h, and the heating rate is 1 ℃/min-10 ℃/min.
Preferably, in the step (3), an attritor mill is used for wet superfine grinding, the rotating speed is 150rad/min-450rad/min, and the grinding time is 1h-6 h.
Preferably, the drying temperature in the step (3) is 80-120 ℃ and the drying time is 2 h-24 h.
Preferably, the rotational speed of the sanding in the step (4) is 1500 rad/min-2500 rad/min, and the sanding time is 2min-60min.
Preferably, in the step (5), the spray drying parameter is 800ml/h of feed amount, the spray inlet temperature is more than or equal to 270 ℃, the spray outlet temperature is more than or equal to 102 ℃, and the firing frequency is 1-2 s/time.
Preferably, the dispersing agent is one or a mixture of a plurality of sodium hexametaphosphate and sodium acrylate homopolymers. More preferably, the dispersant is sodium hexametaphosphate.
In a third aspect, the invention also provides application of the low-viscosity rare earth aluminosilicate in preparing water-based paint.
Preferably, the mass of the low-viscosity rare earth aluminosilicate in the water-based paint is 35-50%.
Preferably, the aqueous coating is an acrylic coating.
Compared with the prior art, the invention has the following advantages:
the rare earth aluminosilicate prepared by the invention has low viscosity performance and is suitable for the field of water-based paint.
In the invention, the rare earth source is selected from rare earth carbonate compound, and carbon dioxide gas is generated in the calcining process, so that the structure is fluffy, and the dispersibility of the calcined powder is better. After the rare earth element reacts with silicon dioxide in the gangue, the original lamellar structure is destroyed, and an apatite type lanthanum silicate, lanthanum aluminate and mullite phase are generated, so that a stable composite structure is formed. Compared with the original lamellar structure, the lamellar structure prepared by the invention can reduce the number of surface hydrogen bonds and the water binding capacity, thereby reducing the viscosity in an aqueous dispersion system.
Drawings
FIG. 1 is an XRD pattern of rare earth aluminosilicate prepared in example 1 of the present invention at a temperature ranging from 1050℃to 1150 ℃;
FIG. 2 is an XRD pattern of rare earth aluminosilicate prepared in example 1 of the invention at a temperature in the range of 1200℃to 1500 ℃;
FIG. 3 is a microscopic electron microscope image of the rare earth aluminosilicate prepared in example 1 of the present invention.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which the inventive concepts pertain. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The invention will be described in detail with reference to examples.
The preparation method of the low-viscosity rare earth aluminosilicate described in the following examples comprises the following steps:
(1) Mixing: the rare earth carbonate compound and the gangue are weighed and then put into a planetary ball mill for 30min dry grinding, and the rotation speed of the ball mill is 300rpm.
(2) Calcining: and (5) placing the ground material into a corundum crucible, and calcining in a muffle furnace. The calcination temperature is 1200 ℃ and the calcination time is 2 hours.
(3) Wet superfine grinding: the whiteness of the calcined product can reach more than 93 degrees, and the grain diameter is 100um. And (3) placing the calcined product into a planetary ball mill for wet superfine grinding, wherein the grain size can be controlled to be D90 less than or equal to 5um after grinding for 3 hours.
(4) And (5) slurry sanding: adding 1% wt of dispersing agent into the wet-milled product (10% sodium hexametaphosphate solution is put into a sand mill for sand milling for 15min, so that slurry with D90 less than or equal to 2um can be obtained.
(5) And (5) atomizing and drying: and (3) dehydrating and dispersing the slurry in a spray drying mode to obtain the rare earth aluminosilicate. The spray drying parameters are 800ml/h of feed amount, the spray inlet temperature is more than or equal to 270 ℃, the spray outlet temperature is more than or equal to 102 ℃, and the firing frequency is 2 s/time.
Example 1
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 75% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
The XRD patterns of the rare earth aluminosilicate prepared in the embodiment in the temperature range of 1050-1150 ℃ are shown in figure 1, the XRD patterns in the temperature range of 1200-1500 ℃ are shown in figure 2, the microscopic electron microscope patterns are shown in figure 3, and the scanning results of EDS elements are shown in the following table:
TABLE 1 EDS element scan
As can be seen from the results of FIGS. 1 to 3 and Table 1, the formation of apatite-type lanthanum silicate is started at 1050 ℃, the formation of lanthanum aluminate is started at 1100 ℃, both of which are lamellar structures, the mullite phase is gradually formed under the promotion effect of rare earth at 1200 ℃ or above, and the apatite-type lanthanum silicate is formed at 1200-1300 ℃, so that the composite lamellar structure of lanthanum aluminate and mullite is stable.
Example 2
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 70% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 3
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 65% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 4
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 60 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 5
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 55 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 6
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 52 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 7
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 50% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 8
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 49% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 9
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 45 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 10
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 40% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 11
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 30 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 12
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 20 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 13
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 10 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 14
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 5 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Example 15
The rare earth carbonate compound is lanthanum cerium carbonate, and the addition amount of the lanthanum cerium carbonate is 70% of the total mass of the raw materials of lanthanum cerium carbonate and coal gangue.
Example 16
The rare earth carbonate compound is cerium carbonate, and the addition amount of the cerium carbonate is 70 percent of the total mass of the raw material cerium carbonate and the coal gangue.
Comparative example 1
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 76 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Comparative example 2
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 78% of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Comparative example 3
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 4 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
Comparative example 4
The rare earth carbonate compound is lanthanum carbonate, and the addition amount of the lanthanum carbonate is 3 percent of the total mass of the raw materials of lanthanum carbonate and coal gangue.
The rare earth aluminosilicates prepared in examples 1-16 and comparative examples were used to prepare white acrylic coatings, which were prepared by the following steps:
s1: adding 25wt% of pure water and 1wt% of dispersant sodium acrylate homopolymer into a plastic barrel, placing the plastic barrel into a dispersing machine, and keeping the rotating speed at 500rpm for 5min;
s2: the dispersing machine is kept at 300rpm, 40wt% of the prepared rare earth aluminosilicate is slowly added, the rotating speed is regulated at 800rpm after the addition, and the rare earth aluminosilicate is dispersed for 20min;
s3: the rotating speed is regulated to 500rpm, 0.4 weight percent of molecular-grade defoamer A and 2 weight percent of film-forming auxiliary agent dodecanol ester film-forming auxiliary agent (powdery dispersing agent is firstly poured into a beaker to prepare pasty liquid and then poured into a coating system) are added for dispersing for 5min;
s4: the rotational speed of the dispersing machine is adjusted to 300rpm (demulsification is prevented when the rotational speed is too high), 30 weight percent of the acrylic emulsion is gradually added, the rotational speed is adjusted to 500rpm, and the dispersing is carried out for 20 minutes;
s5: maintaining the rotation speed at 500rpm, adding 2025.2wt% of polyurethane thickener, and dispersing for 5min;
s6: the rotation speed is kept at 500rpm, and polyether modified siloxane wetting agent is added for 5min of dispersion.
The viscosity of the prepared white acrylic paint was tested, and the test results are shown in the following table:
TABLE 2 results of viscosity test of white acrylic paint
From the above table, it can be seen that the rare earth compound ratio during the preparation of rare earth aluminosilicates can greatly affect the viscosity of subsequent coatings. The rare earth aluminosilicate prepared by the invention has a lamellar structure in an aqueous dispersion system, so that the number of surface hydrogen bonds can be reduced, and the binding capacity with water can be reduced, thereby reducing the viscosity in the aqueous dispersion system.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A low viscosity rare earth aluminosilicate characterized by: the rare earth carbonate is prepared from a rare earth carbonate compound and coal gangue serving as raw materials, wherein the rare earth carbonate compound accounts for 5-75% of the total mass of the raw materials, and the rare earth carbonate compound is one or a mixture of more of lanthanum carbonate, cerium carbonate and lanthanum cerium carbonate;
the preparation method of the low-viscosity rare earth aluminosilicate comprises the following steps:
(1) Mixing: mixing and grinding a rare earth carbonate compound and coal gangue;
(2) Calcining: placing the ground material into a corundum crucible, and calcining in a muffle furnace at the calcining temperature of 1000-1400 ℃ for 1-3h;
(3) Wet superfine grinding: carrying out wet superfine grinding on the calcined product, controlling the grain diameter to be D90 less than or equal to 5um after grinding for 2-3 hours, and drying for later use;
(4) And (5) slurry sanding: adding 1.5-2.0 wt% of dispersing agent into the dried product, and putting into a sand mill for sand milling to obtain slurry with D90 less than or equal to 2 um;
(5) And (5) atomizing and drying: and (3) dehydrating and dispersing the slurry in a spray drying mode to obtain the low-viscosity rare earth aluminosilicate.
2. The low viscosity rare earth aluminosilicate according to claim 1, wherein: the rare earth carbonate compound accounts for 50-75% of the total mass of the raw materials.
3. The low viscosity rare earth aluminosilicate according to claim 1, wherein: the gangue comprises the following components in percentage by mass: siO (SiO) 2 29.50%-48.50%，Al 2 O 3 50.22%-69.50%，Fe 2 O 3 ≤0.5%，TiO 2 ≤0.5%。
4. A process for the preparation of a low viscosity rare earth aluminosilicate as claimed in any one of claims 1 to 3, wherein: the preparation method comprises the following steps:
(1) Mixing: mixing and grinding a rare earth carbonate compound and coal gangue;
(2) Calcining: placing the ground material into a corundum crucible, and calcining in a muffle furnace at the calcining temperature of 1000-1400 ℃ for 1-3h;
(3) Wet superfine grinding: carrying out wet superfine grinding on the calcined product, controlling the grain diameter to be D90 less than or equal to 5um after grinding for 2-3 hours, and drying for later use;
(4) And (5) slurry sanding: adding 1.5-2.0 wt% of dispersing agent into the dried product, and putting into a sand mill for sand milling to obtain slurry with D90 less than or equal to 2 um;
(5) And (5) atomizing and drying: and (3) dehydrating and dispersing the slurry in a spray drying mode to obtain the low-viscosity rare earth aluminosilicate.
5. The method for preparing a low viscosity rare earth aluminosilicate according to claim 4, wherein: the mixed grinding in the step (1) is one of wet ball milling or dry ball milling; the grinding speed is 150rad/min-450rad/min, and the grinding time is 1h-6 h; in the step (3), an attritor mill is used for carrying out wet superfine grinding, the rotating speed is 150rad/min-450rad/min, and the grinding time is 1h-6 h; and (3) the rotating speed of the sand grinding in the step (4) is 1500 rad/min-2500 rad/min, and the sand grinding time is 2min-60min.
6. The method for preparing a low viscosity rare earth aluminosilicate according to claim 4, wherein: the heating rate in the step (2) is 1-10 ℃/min; the drying temperature in the step (3) is 80-120 ℃ and the drying time is 2 h-24 h.
7. The method for preparing a low viscosity rare earth aluminosilicate according to claim 4, wherein: the dispersing agent is one or a mixture of more of sodium hexametaphosphate and sodium acrylate homopolymer.
8. The method for preparing a low viscosity rare earth aluminosilicate according to claim 4, wherein: the spray drying parameter in the step (5) is 800ml/h of feeding amount, the spray inlet temperature is more than or equal to 270 ℃, the spray outlet temperature is more than or equal to 102 ℃, and the firing pin frequency is 1-2 s/time.
9. Use of a low viscosity rare earth aluminosilicate according to any one of claims 1-3 for the preparation of a water-borne coating, characterized in that: the mass of the low-viscosity rare earth aluminosilicate in the water-based paint is 35-50%.
CN202311823890.1A 2023-12-28 2023-12-28 Low-viscosity rare earth aluminosilicate and preparation method and application thereof Active CN117486225B (en)

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