CN104194402A - Preparation method of ultrafine calcium carbonate - Google Patents
Preparation method of ultrafine calcium carbonate Download PDFInfo
- Publication number
- CN104194402A CN104194402A CN201410426954.9A CN201410426954A CN104194402A CN 104194402 A CN104194402 A CN 104194402A CN 201410426954 A CN201410426954 A CN 201410426954A CN 104194402 A CN104194402 A CN 104194402A
- Authority
- CN
- China
- Prior art keywords
- calcium carbonate
- grinding
- preparation
- fine powder
- carbonate superfine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 46
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000000227 grinding Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000009837 dry grinding Methods 0.000 claims description 13
- 235000013312 flour Nutrition 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 235000012054 meals Nutrition 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 238000001238 wet grinding Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract description 4
- 238000002791 soaking Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229940112822 chewing gum Drugs 0.000 description 1
- 235000015218 chewing gum Nutrition 0.000 description 1
- 235000019219 chocolate Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- -1 putty Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012173 sealing wax Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a preparation method of ultrafine calcium carbonate. The preparation method comprises the following steps: (1) primary dry-process grinding; (2) soaking; (3) secondary slurry grinding; (4) drying; and (5) dry-process grinding and modifying to finally obtain the ultrafine calcium carbonate. The ultrafine calcium carbonate prepared by using the preparation method is circular or elliptic, small in particle size (the minimum particle size is up to 6000 meshes) and small in density, is more easily combined with organic matters, and is particularly suitable for powder coatings with high powdering rate, high spraying area and low heavy metal content in industries of coatings and oil paints.
Description
Technical field
The present invention relates to the preparation technology of calcium carbonate, be specifically related to a kind of preparation method of calcium carbonate superfine powder.
Background technology
Calcium carbonate has been widely used in papermaking, plastics, plastics film, chemical fibre, rubber, tackiness agent, sealing agent, daily-use chemical industry, makeup, building materials, ink, putty, sealing wax, putty, carpet veneer packing, medicine, food is (as chewing gum, chocolate), feed, coating, in paint, its effect has: increase small product size, reduce costs, improve processing characteristics (as adjusting viscosity, rheological property, curability), improve dimensional stability, reinforcement or half reinforcement, improve printing performance, improve physicals (as thermotolerance, extinction, wear resistance, flame retardant resistance, whiteness, glossiness) etc.In coating, paint industry, the problems such as powder utilization is low, spray area is little, heavy metal content is high are perplexing powder coating industry always, need to produce especially the powder coating (being high powder utilization, high spray area, low-heavy metal content) of " two high low " for above problem.General production technique, be generally by the Wingdale of supplied materials respectively through jaw crusher, hammer crushing crusher machine, then to material through three grades of pulverizing, grading machine classification, the material up to standard to classification carries out activation modification in mill.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of calcium carbonate superfine powder, and it can produce calcium carbonate superfine powder, thereby eliminates defect in above-mentioned background technology.
For solving the problems of the technologies described above, technical scheme of the present invention is:
1, a preparation method for calcium carbonate superfine powder, comprises the steps:
(1) dry grinding
Lime meal is added in grinding plant and ground, grind 30 minutes, wear into more than fine powder to median size reaches 1500 orders.
(2) soak
By the fine powder grinding, water, fully mixing, the 70%-75% that wherein stone flour accounting weighs, the 25%-35% that water accounting is heavy, soak time is 60 minutes.
(3) secondary slip grinds
The slip obtaining is adopted to wet grinding mode, and add 5% dispersion agent to grind, obtaining thinner slip utilizes ore slurry pump to send into vortrap, qualified fine powder is graded sends into finished product storage warehouse, the underproof thick slurry that particle is larger is sent in mill and is returned mill by eddy flow, until grind to form qualified fine powder, sends into finished product storage warehouse.
(4) dry
Utilize drying plant that slurry is dried, the injection rate of slurry is 40kg/min, and drying temperature is 280-350 ℃, utilizes cyclonic separator to collect additional sack cleaner and collects 3000-6000 object Paris white;
(5) dry grinding modification
The Paris white recycling dry grinding that collection is obtained is broken up, and grinding rate is 1460r/min, and in process of lapping, adds properties-correcting agent, finally obtains described calcium carbonate superfine powder.
Described dispersion agent adopts sodium polyacrylate.
Described properties-correcting agent adopts stearic acid and titanate coupling agent.
The usage quantity of described properties-correcting agent is the 1.2-1.5% of Paris white weight.
Owing to having adopted technique scheme, the invention has the beneficial effects as follows:
First the present invention adds lime meal in grinding plant and carries out dry grinding one time, grinds 30 minutes, wears into more than fine powder to median size reaches 1500 orders, and this carries out early-stage preparations to the grinding fine powder in later operation.By the fine powder grinding, water, fully mixing, the 70%-75% that wherein stone flour accounting weighs, the 25%-35% that water accounting is heavy, soak time is 60 minutes, the proportion of its water and lime fine powder should strictly be controlled, and the strict control of soak time all will be conducive to stone flour and be well dispersed in water, form uniform dispersed system, the work of grinding again that is beneficial to the later stage is carried out.Those skilled in the art generally knows, when stone flour is ground, general employing secondary, three grades of grindings, if adopt multistagely again, grinding effect not only can not improve, and easily produces cotton-shaped precipitation, and the present invention's employing is being used in combination of ore pulp mill and classifying cyclone, greatly improved the effect of grinding, and can not produce cotton-shaped precipitation, and saved and repeated to grind cost.The present invention is dried slurry, owing to not containing properties-correcting agent in slurry, so drying temperature can be chosen as 280-350 ℃, accelerates dry cost-saving, also can not affect the quality of calcium carbonate, the dry grinding modification of finishing operation makes calcium carbonate reach qualified requirement.
Embodiment
A preparation method for calcium carbonate superfine powder, comprises the steps:
(1) dry grinding
Lime meal is added in grinding plant and ground, grind 30 minutes, wear into more than fine powder to median size reaches 1500 orders.
(2) soak
By the fine powder grinding, water, fully mixing, the 70%-75% that wherein stone flour accounting weighs, the 25%-35% that water accounting is heavy, soaking the bubble slurry time is 60 minutes.
(3) secondary slip grinds
The slip obtaining is adopted to wet grinding mode, and add 5% dispersion agent to grind, obtaining thinner slip utilizes ore slurry pump to send into vortrap, qualified fine powder is graded sends into finished product storage warehouse, the underproof thick slurry that particle is larger is sent in mill and is returned mill by eddy flow, until grind to form qualified fine powder, sends into finished product storage warehouse.
(4) dry
Utilize drying plant that slurry is dried, the injection rate of slurry is 40kg/min, and drying temperature is 280-350 ℃, utilizes cyclonic separator to collect additional sack cleaner and collects 3000-6000 object Paris white;
(5) dry grinding modification
The Paris white recycling dry grinding that collection is obtained is broken up, and grinding rate is 1460r/min, and in process of lapping, adds properties-correcting agent, finally obtains described calcium carbonate superfine powder.
Described dispersion agent adopts sodium polyacrylate.
Described properties-correcting agent adopts stearic acid and titanate coupling agent.
The usage quantity of described properties-correcting agent is the 1.2-1.5% of Paris white weight.
First the present invention adds lime meal in grinding plant and carries out dry grinding one time, grinds 30 minutes, wears into more than fine powder to median size reaches 1500 orders, and this carries out early-stage preparations to the grinding fine powder in later operation.By the fine powder grinding, water, fully mixing, the 70%-75% that wherein stone flour accounting weighs, the 25%-35% that water accounting is heavy, soak time is 60 minutes, the proportion of its water and lime fine powder should strictly be controlled, and the strict control of soak time all will be conducive to stone flour and be well dispersed in water, form uniform dispersed system, the work of grinding again that is beneficial to the later stage is carried out.Those skilled in the art generally knows, when stone flour is ground, general employing secondary, three grades of grindings, if adopt multistagely again, grinding effect not only can not improve, and easily produces cotton-shaped precipitation, and the present invention's employing is being used in combination of ore pulp mill and classifying cyclone, greatly improved the effect of grinding, and can not produce cotton-shaped precipitation, and saved and repeated to grind cost.The present invention is dried slurry, owing to not containing properties-correcting agent in slurry, so drying temperature can be chosen as 280-350 ℃, accelerates dry cost-saving, also can not affect the quality of calcium carbonate, the dry grinding modification of finishing operation makes calcium carbonate reach qualified requirement.
Adopt existing method, the particle diameter minimum of Paris white is 2000 orders, although activation rate is similar with method of the present invention, its heavy metal content is high, powder utilization is low, spray area is little.Can see thus, the Paris white that adopts the present invention to prepare, it is shaped as circle or ellipse, and particle diameter is thin, and minimum reaches 6000 orders, distributes close, with the easier combination of organism.Powder coating (being high powder utilization, high spray area, low-heavy metal content) especially for " two high one low " in coating, paint industry
.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other specific form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.
Claims (4)
1. a preparation method for calcium carbonate superfine powder, comprises the steps:
(1) dry grinding
Lime meal is added in grinding plant and ground, grind 30 minutes, wear into more than fine powder to median size reaches 1500 orders;
(2) soak
By the fine powder grinding, water, fully mixing, the 70%-75% that wherein stone flour accounting weighs, the 25%-35% that water accounting is heavy, soak time is 60 minutes;
(3) secondary slip grinds
The slip obtaining is adopted to wet grinding mode, and add 5% dispersion agent to grind, obtaining thinner slip utilizes ore slurry pump to send into vortrap, qualified fine powder is graded sends into finished product storage warehouse, the underproof thick slurry that particle is larger is sent in mill and is returned mill by eddy flow, until grind to form qualified fine powder, sends into finished product storage warehouse;
(4) dry
Utilize drying plant that slurry is dried, the injection rate of slurry is 40kg/min, and drying temperature is 280-350 ℃, utilizes cyclonic separator to collect additional sack cleaner and collects 3000-6000 object Paris white;
(5) dry grinding modification
The Paris white recycling dry grinding that collection is obtained is broken up, and grinding rate is 1460r/min, and in process of lapping, adds properties-correcting agent, finally obtains described calcium carbonate superfine powder.
2. the preparation method of a kind of calcium carbonate superfine powder according to claim 1, is characterized in that, described dispersion agent adopts sodium polyacrylate.
3. the preparation method of a kind of calcium carbonate superfine powder according to claim 1, is characterized in that, described properties-correcting agent adopts stearic acid and titanate coupling agent.
4. according to the preparation method of a kind of calcium carbonate superfine powder described in claim 1 or 3, it is characterized in that, the usage quantity of described properties-correcting agent is the 1.2-1.5% of Paris white weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426954.9A CN104194402A (en) | 2014-08-27 | 2014-08-27 | Preparation method of ultrafine calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410426954.9A CN104194402A (en) | 2014-08-27 | 2014-08-27 | Preparation method of ultrafine calcium carbonate |
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| Publication Number | Publication Date |
|---|---|
| CN104194402A true CN104194402A (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410426954.9A Pending CN104194402A (en) | 2014-08-27 | 2014-08-27 | Preparation method of ultrafine calcium carbonate |
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| Country | Link |
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| CN (1) | CN104194402A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106433220A (en) * | 2016-08-22 | 2017-02-22 | 江西广源化工有限责任公司 | Preparation method of modified superfine calcium carbonate powder and product of preparation method |
| CN106830044A (en) * | 2017-04-17 | 2017-06-13 | 华东理工大学 | A kind of preparation method of the narrow fine particle calcium carbonate of particle diameter distribution |
| CN109852102A (en) * | 2018-12-20 | 2019-06-07 | 江西广源化工有限责任公司 | A kind of preparation method of bloom BOPP biaxially oriented film specialized superfine calcium carbonate |
| CN118222114A (en) * | 2024-02-29 | 2024-06-21 | 广东东元高新材料有限公司 | Calcium carbonate powder wet modification production process for breathable film master batch |
-
2014
- 2014-08-27 CN CN201410426954.9A patent/CN104194402A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106433220A (en) * | 2016-08-22 | 2017-02-22 | 江西广源化工有限责任公司 | Preparation method of modified superfine calcium carbonate powder and product of preparation method |
| CN106830044A (en) * | 2017-04-17 | 2017-06-13 | 华东理工大学 | A kind of preparation method of the narrow fine particle calcium carbonate of particle diameter distribution |
| CN109852102A (en) * | 2018-12-20 | 2019-06-07 | 江西广源化工有限责任公司 | A kind of preparation method of bloom BOPP biaxially oriented film specialized superfine calcium carbonate |
| CN118222114A (en) * | 2024-02-29 | 2024-06-21 | 广东东元高新材料有限公司 | Calcium carbonate powder wet modification production process for breathable film master batch |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20141210 |