CN108084739A - A kind of dry type preparation process of calcium carbonate superfine powder - Google Patents
A kind of dry type preparation process of calcium carbonate superfine powder Download PDFInfo
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- CN108084739A CN108084739A CN201711442709.7A CN201711442709A CN108084739A CN 108084739 A CN108084739 A CN 108084739A CN 201711442709 A CN201711442709 A CN 201711442709A CN 108084739 A CN108084739 A CN 108084739A
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- Prior art keywords
- grinding
- calcium carbonate
- dry
- slurry
- carbonate superfine
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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
- 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
- C09C3/08—Treatment with low-molecular-weight non-polymer organic 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of dry type preparation processes of calcium carbonate superfine powder, include the following steps：（1）Dry grinding；（2）It impregnates；（3）Secondary slurry grinding；（4）It is dry；（5）Dry grinding is modified, and finally obtains the calcium carbonate superfine powder.The Paris white prepared using the method for the present invention, shape are circular or ellipse, and grain size is thin, and minimum up to 6000 mesh, distribution is close, is easier to combine with organic matter, particularly for " two high one is low " in coating, paint industry（I.e. high powder utilization, high spray area, low-heavy metal content）Powdery paints.
Description
Technical field
The present invention relates to the preparation processes of calcium carbonate, and in particular to a kind of dry type preparation process of calcium carbonate superfine powder.
Background technology
Calcium carbonate is widely used to papermaking, plastics, plastic film, chemical fibre, rubber, adhesive, sealant, dailyization
Work, cosmetics, building materials, ink, putty, sealing wax, putty, carpet veneer packaging, medicine, food（Such as chewing gum, chocolate）, feed,
In coating, paint, effect has：Increase small product size, reduce cost, improve processing performance（Such as adjust viscosity, rheological property,
Curability）, dimensional stability, reinforcement or half reinforcement are improved, improves printing performance, improves physical property（Such as heat resistance, delustring
Property, wearability, anti-flammability, whiteness, glossiness）Deng.Particularly in coating, paint industry, powder utilization to be low, spray area
Small, the problems such as content of beary metal is high, annoyings powdery paints industry always, especially needs to produce that " two is high by one in view of the above problems
It is low "（I.e. high powder utilization, high spray area, low-heavy metal content）Powdery paints.General production technology, usually by supplied materials
Lime stone respectively through jaw crusher, hammer crushing crusher machine, then material is crushed through three-level, grader classification, to point
Grade material up to standard carries out activation modification in mill.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of dry type preparation process of calcium carbonate superfine powder, can produce
Go out calcium carbonate superfine powder, so as to eliminate defect in above-mentioned background technology.
In order to solve the above technical problems, the technical scheme is that：
1st, the dry type preparation process of a kind of calcium carbonate superfine powder, includes the following steps：
（1）Dry grinding
Will lime coarse powder add in milling apparatus in grind, grind 30 minutes, wear into fine powder to average grain diameter up to 1500 mesh more than.
（2）It impregnates
It by the fine powder ground, water, is sufficiently mixed, wherein the 70%-75% of mountain flour accounting weight, the 25%-35% of water accounting weight impregnates
Time is 60 minutes.
（3）Secondary slurry grinding
By obtained slurry using wet grinding manner, and 5% dispersant grinding is added in, obtain thinner slurry and utilize ore pulp
Vortrap is pumped into, qualified fine powder, which is graded, is sent into finished product storage warehouse, and the larger underproof thick slurry of particle is by eddy flow
It is sent into mill and returns mill, until being ground into qualified fine powder is sent into finished product storage warehouse.
（4）It is dry
Slurry is dried using drying equipment, the injection rate of slurry is 40kg/min, drying temperature 280-350
DEG C, utilize the Paris white of the additional bag filter collection 3000-6000 mesh of cyclone collection；
（5）Dry grinding is modified
The Paris white that collection is obtained recycles dry grinding to break up, grinding rate 1460r/min, and in process of lapping
Middle addition modifying agent finally obtains the calcium carbonate superfine powder.
The dispersant uses Sodium Polyacrylate.
The modifying agent uses stearic acid and titanate coupling agent.
The usage amount of the modifying agent is the 1.2-1.5% of Paris white weight.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Lime coarse powder is added in milling apparatus carry out dry grinding first by the present invention, is ground 30 minutes, wears into fine powder to putting down
For equal grain size up to more than 1500 mesh, this carries out early-stage preparations to the grinding fine powder in later process.By the fine powder ground, water, fill
Divide the 70%-75% of mixing, wherein mountain flour accounting weight, the 25%-35% of water accounting weight, soaking time is 60 minutes, water and lime
The proportion of fine powder should be controlled strictly and the stringent control of soaking time to be all beneficial to mountain flour fully dispersed in water, formed
Uniform disperse system, the regrinding work beneficial to the later stage carry out.Those skilled in the art is generally known that, to mountain flour into
It during row grinding, is generally ground using two level, three-level, if using multistage again, grinding effect not but not improves, and easily produces
Raw cotton-shaped precipitation, and the present invention being applied in combination using ore pulp mill and classifying cyclone, substantially increase the effect of grinding
Fruit, and cotton-shaped precipitation will not be generated, and save repetition grinding cost.Slurry is dried in the present invention, due to slurry
In do not contain modifying agent, therefore drying temperature can be 280-350 DEG C with selected as, accelerate drying cost-effective, will not influence carbon
The quality of sour calcium, the dry grinding modification of finishing operation make calcium carbonate reach Eligibility requirements.
Specific embodiment
A kind of dry type preparation process of calcium carbonate superfine powder, includes the following steps：
（2）Dry grinding
Will lime coarse powder add in milling apparatus in grind, grind 30 minutes, wear into fine powder to average grain diameter up to 1500 mesh more than.
（2）It impregnates
It by the fine powder ground, water, is sufficiently mixed, wherein the 70%-75% of mountain flour accounting weight, the 25%-35% of water accounting weight impregnates
The bubble slurry time is 60 minutes.
（3）Secondary slurry grinding
By obtained slurry using wet grinding manner, and 5% dispersant grinding is added in, obtain thinner slurry and utilize ore pulp
Vortrap is pumped into, qualified fine powder, which is graded, is sent into finished product storage warehouse, and the larger underproof thick slurry of particle is by eddy flow
It is sent into mill and returns mill, until being ground into qualified fine powder is sent into finished product storage warehouse.
（4）It is dry
Slurry is dried using drying equipment, the injection rate of slurry is 40kg/min, drying temperature 280-350
DEG C, utilize the Paris white of the additional bag filter collection 3000-6000 mesh of cyclone collection；
（5）Dry grinding is modified
The Paris white that collection is obtained recycles dry grinding to break up, grinding rate 1460r/min, and in process of lapping
Middle addition modifying agent finally obtains the calcium carbonate superfine powder.
The dispersant uses Sodium Polyacrylate.
The modifying agent uses stearic acid and titanate coupling agent.
The usage amount of the modifying agent is the 1.2-1.5% of Paris white weight.
Lime coarse powder is added in milling apparatus carry out a dry grinding first by the present invention, is ground 30 minutes, is worn into fine powder
More than to average grain diameter up to 1500 mesh, this carries out early-stage preparations to the grinding fine powder in later process.By the fine powder ground,
Water is sufficiently mixed, wherein the 70%-75% of mountain flour accounting weight, the 25%-35% of water accounting weight, and soaking time is 60 minutes, water
It should strictly be controlled with the proportion of lime fine powder and the stringent control of soaking time is all beneficial to mountain flour and is well dispersed in water
In, uniform disperse system is formed, the regrinding work beneficial to the later stage carries out.Those skilled in the art is generally known that,
When being ground to mountain flour, generally ground using two level, three-level, if using multistage again, grinding effect not but not improves, and
And easily generate cotton-shaped precipitation, and the present invention is applied in combination using ore pulp mill and classifying cyclone, substantially increases
The effect of grinding, and cotton-shaped precipitation will not be generated, and save repetition grinding cost.Slurry is dried in the present invention,
Due to not containing modifying agent in slurry, drying temperature can be 280-350 DEG C with selected as, accelerate drying cost-effective, also not
The quality of calcium carbonate can be influenced, the dry grinding modification of finishing operation makes calcium carbonate reach Eligibility requirements.
Using existing method, minimum 2000 mesh of grain size of Paris white, although activation rate and the method for the present invention
Almost, but its content of beary metal is high, powder utilization is low, spray area is small.It can thus be seen that the carbon prepared using the present invention
Sour calcium powder, shape are circular or ellipse, and grain size is thin, and minimum up to 6000 mesh, distribution is close, is easier to combine with organic matter.
Particularly for " two high one is low " in coating, paint industry（I.e. high powder utilization, high spray area, low-heavy metal content）Powder
Last coating.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.
Claims (4)
1. a kind of dry type preparation process of calcium carbonate superfine powder, includes the following steps：
Dry grinding
Will lime coarse powder add in milling apparatus in grind, grind 30 minutes, wear into fine powder to average grain diameter up to 1500 mesh more than；
（2）It impregnates
It by the fine powder ground, water, is sufficiently mixed, wherein the 70%-75% of mountain flour accounting weight, the 25%-35% of water accounting weight impregnates
Time is 60 minutes；
（3）Secondary slurry grinding
By obtained slurry using wet grinding manner, and 5% dispersant grinding is added in, obtain thinner slurry and utilize ore pulp
Vortrap is pumped into, qualified fine powder, which is graded, is sent into finished product storage warehouse, and the larger underproof thick slurry of particle is by eddy flow
It is sent into mill and returns mill, until being ground into qualified fine powder is sent into finished product storage warehouse；
（4）It is dry
Slurry is dried using drying equipment, the injection rate of slurry is 40kg/min, drying temperature 280-350
DEG C, utilize the Paris white of the additional bag filter collection 3000-6000 mesh of cyclone collection；
（5）Dry grinding is modified
The Paris white that collection is obtained recycles dry grinding to break up, grinding rate 1460r/min, and in process of lapping
Middle addition modifying agent finally obtains the calcium carbonate superfine powder.
2. the dry type preparation process of a kind of calcium carbonate superfine powder according to claim 1, which is characterized in that the dispersant is adopted
Use Sodium Polyacrylate.
3. the dry type preparation process of a kind of calcium carbonate superfine powder according to claim 1, which is characterized in that the modifying agent is adopted
With stearic acid and titanate coupling agent.
A kind of 4. dry type preparation process of calcium carbonate superfine powder according to claim 1 or 3, which is characterized in that the modification
The usage amount of agent is the 1.2-1.5% of Paris white weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711442709.7A CN108084739A (en) | 2017-12-27 | 2017-12-27 | A kind of dry type preparation process of calcium carbonate superfine powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711442709.7A CN108084739A (en) | 2017-12-27 | 2017-12-27 | A kind of dry type preparation process of calcium carbonate superfine powder |
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| Publication Number | Publication Date |
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| CN108084739A true CN108084739A (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711442709.7A Pending CN108084739A (en) | 2017-12-27 | 2017-12-27 | A kind of dry type preparation process of calcium carbonate superfine powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019396A (en) * | 2019-12-06 | 2020-04-17 | 佛山众塑联供应链服务有限公司 | Preparation method of modified heavy calcium carbonate for PVC foamed sheet hard plastic product and modified heavy calcium carbonate |
-
2017
- 2017-12-27 CN CN201711442709.7A patent/CN108084739A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019396A (en) * | 2019-12-06 | 2020-04-17 | 佛山众塑联供应链服务有限公司 | Preparation method of modified heavy calcium carbonate for PVC foamed sheet hard plastic product and modified heavy calcium carbonate |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180529 |
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| WD01 | Invention patent application deemed withdrawn after publication |