CN111138888A - Special calcium carbonate filler for environment-friendly cultural paper and preparation method thereof - Google Patents
Special calcium carbonate filler for environment-friendly cultural paper and preparation method thereof Download PDFInfo
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- CN111138888A CN111138888A CN201911358971.2A CN201911358971A CN111138888A CN 111138888 A CN111138888 A CN 111138888A CN 201911358971 A CN201911358971 A CN 201911358971A CN 111138888 A CN111138888 A CN 111138888A
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- 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
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
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- 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
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
- C09C1/022—Treatment with inorganic compounds
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- 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
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- 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
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- 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
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- 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a special calcium carbonate filler for environment-friendly cultural paper, which comprises the following steps: dispersing calcium carbonate powder consisting of white mud drying powder and calcite powder in water containing a neutral dispersant, and stirring at a high speed to obtain a pre-dispersed calcium carbonate suspension; the whiteness of the white mud drying powder is not higher than 70%; and (3) carrying out wet ultrafine grinding on the pre-dispersed calcium carbonate suspension by using a sand mill or a stripping machine, additionally adding an acid dispersing agent in the process, and stopping grinding until the content of particles with the particle size of less than 2 mu m reaches 50-70% so as to obtain the special calcium carbonate filler for the environment-friendly cultural paper. The invention can develop a new way for high-value resource utilization of the alkali recovered white mud drying powder, can reduce the pollution of white mud waste to the environment in the papermaking process, reduce the production cost of wet calcium carbonate filler, and is also beneficial to reducing the production cost of papermaking filling and saving calcite resources.
Description
Technical Field
The invention relates to the technical field of papermaking fillers, in particular to a special calcium carbonate filler for environment-friendly cultural paper and a preparation method thereof.
Background
The application of Chinese domestic Ground Calcium Carbonate (GCC) is started from the late nineties of the twentieth century, and the usage amount is increased year by year along with the development of domestic paper making industry. The raw material of the Ground Calcium Carbonate (GCC) is calcite. With the rapid development of industries such as papermaking, coating and the like in recent years, the usage amount of calcium carbonate is increased year by year, high-quality ores in various mining areas are consumed greatly, and low-grade ores are more. At present, each superfine heavy calcium carbonate factory is mainly produced by mixing calcite powder in Guangxi mountain flour, Anhui province, and other places so as to properly reduce the production cost and reach the quality standard of the paper industry.
The alkali recovery white mud drying powder is a powdery alkali recovery white mud product prepared by drying solid waste residues generated in the alkali recovery process of pulping and papermaking enterprises through flue gas of a thermal power plant, crushing, sieving and collecting, wherein the main component of the white mud drying powder is CaCO3The content reaches 80 to 90 percent; an average of about 0.8-1 ton of white mud is produced per ton of paper or pulp produced. The white mud is alkaline, has a pH value of 9-12, and has strong corrosivity. At present, the main approaches for recycling the white mud are as follows: the white mud is ground and dried (the self-use part does not need to be dried) to produce light calcium carbonate which is used as the paper making filler. The method is mainly suitable for enterprises which produce natural-color cultural paper by taking grass fibers and bamboo fibers as raw materials. At present, the alkali recovery white mud dried powder is not directly used for processing heavy calcium carbonate filler by wet grinding.
In 2018, China has already issued national standards for the maximum limit of brightness (whiteness) of paper and paperboard. This standard is for 11 paper grades of newsprint, copy, offset and the like, wherein the highest whiteness of the copy paper is 95 degrees, and the highest whiteness of the offset and book paper is 90 degrees. And the whiteness of products of a large number of known paper making enterprises exceeds the national standard. Limiting paper whiteness is a social engineering requiring members of the whole society to participate and push together. The paper making enterprises can use unbleached pulp and recycled pulp to produce paper, can add little or no whitening agent in the paper making process, and simultaneously use environment-friendly calcium carbonate filler (the whiteness is less than 91 percent) as paper making filler when the wet end is filled.
Under the increasingly severe conditions of the current environmental protection policy, a papermaking enterprise not only needs to practice a comprehensive resource utilization system of waste white mud, waste flue gas and the like in the pulping and papermaking process, and processes and produces the waste white mud, the waste flue gas and the like into papermaking filler, and then returns to the papermaking enterprise for value-added use, so that the requirements of closed-loop production and zero emission of the green and environmental-friendly papermaking enterprise are gradually met. The existing wet-process calcium carbonate filler production and preparation methods do not relate to the preparation method of the special calcium carbonate filler for the environment-friendly cultural paper with the whiteness of less than 91 percent.
Disclosure of Invention
The invention aims to provide a special calcium carbonate filler for environment-friendly cultural paper and a preparation method thereof, so as to solve the defects in the background technology.
The invention is realized by the following technical scheme:
a preparation method of a special calcium carbonate filler for environment-friendly cultural paper comprises the following steps:
step one, dispersing calcium carbonate powder consisting of white mud drying powder and calcite powder in water containing a neutral dispersant, and stirring at a high speed to prepare a pre-dispersed calcium carbonate suspension; the whiteness of the white mud drying powder is not higher than 70%;
and step two, carrying out wet ultrafine grinding on the pre-dispersed calcium carbonate suspension by using a sand mill or a stripping machine, additionally adding an acid dispersing agent in the process, and stopping grinding until the content of particles with the particle size of less than 2 mu m reaches 50-70% so as to obtain the special calcium carbonate filler for the environment-friendly cultural paper.
Preferably, the weight of the white mud drying powder accounts for 2-40% of the weight of the calcium carbonate powder.
The white mud drying powder is a powder sample prepared by drying, crushing and sieving solid waste residue-white mud generated in the alkali recovery process of a paper making enterprise through flue gas of a thermal power plant. The particle size of the white mud dried powder is preferably 200 meshes of screen.
The calcite powder is calcite or chalk that has been crushed, sieved, preferably through a 325 mesh screen.
In the first step, the addition amount of the neutral dispersant is 0.1-1.0% of the weight of the calcium carbonate powder.
In the second step, the adding amount of the acidic dispersing agent is 0.1-1.5% of the weight of the calcium carbonate powder.
The dispersant is at least one selected from polyacrylate dispersant, polycarboxylate dispersant or hexametaphosphate.
Preferably, the stirring speed in the first step is 400-; the grinding rotation speed of the second step is 800-1800r/min, and the grinding time is 20-100 min.
And step two, adding a grinding medium into the pre-dispersed calcium carbonate suspension for wet grinding, wherein the grinding medium is zirconium silicate beads, ceramic composite beads and other grinding beads, the specification of the grinding medium is 1.0-1.2mm, 1.5-2.0mm or 2.0-2.2mm, one specification of the grinding beads can be used independently, and two or more specifications of the grinding beads can be used simultaneously.
Preferably, the weight ratio of the grinding medium to the calcium carbonate powder is 2-10: 1.
The calcium carbonate filler special for the environment-friendly cultural paper prepared by the method has the particle content of more than 50-70% with the particle size of less than 2 mu m, the solid content of 40-80% and the whiteness of 80-89%.
The invention can develop a new way for high-value resource utilization of the alkali recovered white mud drying powder, can reduce the pollution of white mud waste to the environment in the papermaking process, reduce the production cost of wet calcium carbonate filler, and is also beneficial to reducing the production cost of papermaking filling and saving calcite resources.
Detailed Description
The invention is illustrated below by means of specific examples, without being restricted thereto. Unless otherwise specified, each raw material is a commercially available product.
Example 1
Firstly, white mud drying powder is pre-dispersed. Weighing a certain amount of water, adding the water into a grinding barrel, and adding 0.18% of neutral polyacrylate dispersant; starting stirring at the rotating speed of 500 rpm; weighing a certain amount of dried powder (whiteness: 66.15%) of white mud with 200 meshes, adding the dried powder into a dispersion barrel, starting stirring, and dispersing for 10min at the rotation speed of 500 rpm; slowly adding heavy calcium powder (passing through a 325-mesh sieve), wherein the oven-dried mass ratio of the white mud baking powder to the heavy calcium powder is 5: 95, the solid content of the mixed calcium carbonate slurry is 76 percent, and the dispersion time is 20 min.
Adding zirconium silicate beads or ceramic composite beads with the diameter of 2.0-2.2mm into a grinding barrel, wherein the ball-material ratio is 2: 1; increasing the rotation speed of the grinder to 1100rpm, and slowly dropwise adding 0.32% of acidic polyacrylate dispersant (the acidic dispersant and water are diluted into dispersant aqueous solution according to the proportion of 1: 3); after grinding for 60min, the D50 particle size is 1.53 μm, the particle content of less than 2 μm is 62.09%, the grinding is stopped, and the product whiteness is 88.94%.
Example 2
Firstly, white mud drying powder is pre-dispersed. Weighing a certain amount of water, adding the water into a grinding barrel, and adding 0.18% of neutral polyacrylate dispersant; starting stirring at the rotating speed of 400 rpm; weighing a certain amount of dried powder (whiteness: 66.15%) of white mud with 200 meshes, adding the dried powder into a dispersion barrel, starting stirring, and dispersing for 10min at the rotation speed of 350 rpm; slowly adding heavy calcium powder (passing through a 325-mesh sieve), wherein the oven-dried mass ratio of the white mud drying powder to the heavy calcium powder is 10:90, the solid content of the mixed calcium carbonate slurry is 76%, and the dispersion time is 10 min.
Adding zirconium silicate beads or ceramic composite beads with the diameter of 2.0-2.2mm into a grinding barrel, wherein the ball-material ratio is 3: 1; increasing the rotation speed of the grinder to 1300rpm, and slowly dropwise adding 0.32% of acidic polyacrylate dispersant (the acidic dispersant and water are diluted into dispersant aqueous solution according to the proportion of 1: 3); after grinding for 60min, the content of D50 particles with the particle size of 1.50 μm and the particle size of less than 2 μm is 62.87%, the grinding is stopped, and the product is discharged with the whiteness of 87.51%.
Example 3
Firstly, white mud drying powder is pre-dispersed. Weighing a certain amount of water, adding the water into a grinding barrel, and adding 0.18% of neutral polyacrylate dispersant; starting stirring at the rotating speed of 500 rpm; weighing a certain amount of dried powder (whiteness: 66.15%) of white mud with 200 meshes, adding the dried powder into a dispersion barrel, starting stirring, and dispersing for 5min at the rotation speed of 500 rpm; slowly adding heavy calcium powder (passing through a 325-mesh sieve), wherein the oven-dried mass ratio of the white mud oven-dried powder to the heavy calcium powder is 20:80, the solid content of the mixed calcium carbonate slurry is 76%, and the dispersion time is 5 min.
Adding zirconium silicate beads or ceramic composite beads with the diameter of 2.0-2.2mm into a grinding barrel, wherein the ball-material ratio is 3: 1; increasing the rotation speed of the grinder to 1200rpm, and slowly adding 0.32% of acidic polyacrylate dispersant (the acidic dispersant and water are diluted into dispersant aqueous solution according to the proportion of 1: 3); after grinding for 55min, the content of D50 particles with the particle size of 1.53 μm and the particle size of less than 2 μm is 62.29%, the grinding is stopped, and the product whiteness is 84.23%.
Example 4
Firstly, white mud drying powder is pre-dispersed. Weighing a certain amount of water, adding the water into a grinding barrel, and adding 0.18% of neutral polyacrylate dispersant; starting stirring at the rotating speed of 500 rpm; weighing a certain amount of dried powder (whiteness: 66.15%) of white mud with 200 meshes, adding the dried powder into a dispersion barrel, starting stirring, and dispersing for 5min at the rotation speed of 500 rpm; slowly adding heavy calcium powder (passing through a 325-mesh sieve), wherein the oven-dried mass ratio of the white mud drying powder to the heavy calcium powder is 40:60, the solid content of the mixed calcium carbonate slurry is 76%, and the dispersion time is 5 min.
Adding zirconium silicate beads or ceramic composite beads with the diameter of 2.0-2.2mm into a grinding barrel, wherein the ball-material ratio is 3: 1; increasing the rotation speed of the grinder to 1200rpm, and slowly adding 0.32% of acidic polyacrylate dispersant (the acidic dispersant and water are diluted into dispersant aqueous solution according to the proportion of 1: 3); after grinding for 60min, the content of D50 particles with particle size of 1.62 μm and particle size less than 2 μm is 62.51%, the grinding is stopped, and the product whiteness is 81.16%.
Comparative example
Firstly, white mud drying powder is pre-dispersed. Weighing a certain amount of water, adding the water into a grinding barrel, and adding 0.18% of neutral polyacrylate dispersant; starting stirring at the rotating speed of 500 rpm; weighing a certain amount of dried powder (whiteness: 66.15%) of white mud with 200 meshes, adding the dried powder into a dispersion barrel, starting stirring, and dispersing for 10min at the rotation speed of 500 rpm; the solid content of the mixed calcium carbonate slurry is 76%, and the dispersion time is 20 min.
Adding zirconium silicate beads or ceramic composite beads with the diameter of 2.0-2.2mm into a grinding barrel, wherein the ball-material ratio is 2: 1; increasing the rotation speed of the grinder to 1100rpm, and slowly dropwise adding 0.32% of acidic polyacrylate dispersant (the acidic dispersant and water are diluted into dispersant aqueous solution according to the proportion of 1: 3); after grinding for 60min, the content of D50 particles with particle size of 1.40 μm and particle size less than 2 μm is 66.87%, the grinding is stopped, and the product whiteness is 72.19%.
Specific indexes of the calcium carbonate slurries of examples 1 to 3 and comparative example are shown in table 1.
TABLE 1 specific index of calcium carbonate slurries
| Numbering | Solid content | pH value | Viscosity of the oil | Tack-back for 1h | Particle size | Whiteness degree |
| Example 1 | 65.00 | 8.19 | 21 | 30 | 62.09 | 88.94 |
| Example 2 | 65.00 | 8.66 | 20 | 30 | 62.87 | 87.51 |
| Example 3 | 65.00 | 10.07 | 23 | 34 | 62.29 | 84.23 |
| Example 4 | 65.00 | 10.28 | 25 | 36 | 62.51 | 81.16 |
| Comparative example | 65.00 | 11.16 | 98 | 162 | 66.83 | 72.19 |
From the concrete indexes of the above examples and comparative examples, it can be seen that the calcium carbonate slurry prepared by using 100% of white mud drying powder has high viscosity and thick particle size, and has poor quality when used as a paper filler.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A preparation method of a special calcium carbonate filler for environment-friendly cultural paper is characterized by comprising the following steps:
step one, dispersing calcium carbonate powder consisting of white mud drying powder and calcite powder in water containing a neutral dispersant, and stirring at a high speed to prepare a pre-dispersed calcium carbonate suspension; the whiteness of the white mud drying powder is not higher than 70%;
and step two, carrying out wet ultrafine grinding on the pre-dispersed calcium carbonate suspension by using a sand mill or a stripping machine, additionally adding an acid dispersing agent in the process, and stopping grinding until the content of particles with the particle size of less than 2 mu m reaches 50-70% so as to obtain the special calcium carbonate filler for the environment-friendly cultural paper.
2. The method according to claim 1, characterized in that the weight of the dried white mud powder is between 2 and 40% of the weight of the calcium carbonate powder.
3. The method according to claim 1, wherein the particle size of the white mud baking powder is passed through a 200 mesh screen and the calcite powder is passed through a 325 mesh screen.
4. The method of claim 1, wherein in step one, the neutral dispersant is added in an amount of 0.1 to 1.0% by weight of the calcium carbonate powder; in the second step, the adding amount of the acidic dispersing agent is 0.1-1.5% of the weight of the calcium carbonate powder.
5. The method of claim 1, wherein the dispersant is selected from at least one of a polyacrylate dispersant, a polycarboxylate dispersant, or a hexametaphosphate.
6. The method as claimed in claim 1, wherein the stirring speed in step one is 400-1000r/min, and the dispersion time is 5-20 min.
7. The method as claimed in claim 1, wherein the polishing speed in step two is 800-1800r/min, and the polishing time is 20-100 min.
8. The method of claim 1, wherein in step two, grinding media are added to the pre-dispersed calcium carbonate suspension for wet grinding, and the weight ratio of the grinding media to the calcium carbonate powder is 2-10: 1.
9. The method of claim 8, wherein the grinding media are zirconium silicate beads or ceramic composite beads and the grinding media have a gauge selected from at least one of 1.0 mm to 1.2mm, 1.5 mm to 2.0mm, or 2.0mm to 2.2 mm.
10. The calcium carbonate filler special for the environment-friendly cultural paper prepared by the method of any one of claims 1 to 9 is characterized in that the calcium carbonate filler special for the environment-friendly cultural paper has a particle content of 50 to 70 percent with a particle size of less than 2 μm, a solid content of 40 to 80 percent and a whiteness of 80 to 89 percent.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127211A (en) * | 2020-09-27 | 2020-12-25 | 山西宇皓环保纸业有限公司 | Stone paper, calcium carbonate slurry and preparation method thereof |
| CN114621605A (en) * | 2022-02-28 | 2022-06-14 | 上海东升新材料有限公司 | Mixed calcium carbonate filler and preparation method thereof |
| CN115821627A (en) * | 2022-12-27 | 2023-03-21 | 上海东升新材料有限公司 | Method for preparing papermaking filler by using limestone mine waste rock and application thereof |
| CN115852736A (en) * | 2022-12-22 | 2023-03-28 | 上海东升新材料有限公司 | Coating using yellow stone pigment and application thereof |
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| CN103509377A (en) * | 2013-08-23 | 2014-01-15 | 造纸工业生产力促进中心 | Refined calcium carbonate pigment prepared from alkali-recycled white clay and preparation method thereof |
| CN103881417A (en) * | 2012-12-24 | 2014-06-25 | 许峰 | Superhigh-fineness calcium carbonate composite powder |
| CN106395878A (en) * | 2015-08-03 | 2017-02-15 | 海南金海浆纸业有限公司 | Method for preparing calcium carbonate filler for papermaking from wood pulp white mud and calcium carbonate filler |
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| CN102976387A (en) * | 2012-12-07 | 2013-03-20 | 陕西科技大学 | Improved preparation technology of white mud calcium carbonate for papermaking filler |
| CN103881417A (en) * | 2012-12-24 | 2014-06-25 | 许峰 | Superhigh-fineness calcium carbonate composite powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112127211A (en) * | 2020-09-27 | 2020-12-25 | 山西宇皓环保纸业有限公司 | Stone paper, calcium carbonate slurry and preparation method thereof |
| CN114621605A (en) * | 2022-02-28 | 2022-06-14 | 上海东升新材料有限公司 | Mixed calcium carbonate filler and preparation method thereof |
| CN115852736A (en) * | 2022-12-22 | 2023-03-28 | 上海东升新材料有限公司 | Coating using yellow stone pigment and application thereof |
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| CN115821627B (en) * | 2022-12-27 | 2024-02-06 | 上海东升新材料有限公司 | Method for preparing papermaking filler by using limestone mine waste rock and application thereof |
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