CN105001674A - High-purity activated heavy calcium carbonate - Google Patents
High-purity activated heavy calcium carbonate Download PDFInfo
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- CN105001674A CN105001674A CN201410151044.4A CN201410151044A CN105001674A CN 105001674 A CN105001674 A CN 105001674A CN 201410151044 A CN201410151044 A CN 201410151044A CN 105001674 A CN105001674 A CN 105001674A
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- calcium carbonate
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- ground limestone
- pure active
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Abstract
The present invention discloses a high-purity activated heavy calcium carbonate. The preparation steps comprise: carrying out mechanical crushing on calcite, and conveying into a grinder to grind to obtain calcium carbonate coarse powder; adding water to the grinded coarse powder, conveying into the grinder, and grinding by using a wet grinding process to obtain a calcium carbonate semi-finished product, wherein a mass ratio of the grinded coarse powder to the water is 2:1-1.5; adding a stearic acid and calcium stearate mixture as a modifying agent to the calcium carbonate semi-finished product, carrying out a modifying treatment, and carrying out a drying treatment; and finally conveying the modified calcium carbonate into a strong magnetic stripe powder screening box to screen to obtain the finished product high-purity activated heavy calcium carbonate. According to the present invention, the physical grinding is used to obtain the heavy calcium carbonate, the heavy calcium carbonate prepared by using the wet grinding has characteristics of high dispersity and small particle size distribution, the performance is excellent especially after the second wet grinding, and the calcium carbonate powder screened through the strong magnetic stripe powder screening box has characteristics of high purity and white chrominance.
Description
Technical field
The present invention relates to a kind of water-ground limestone, particularly relate to a kind of highly pure active water-ground limestone.
Background technology
Water-ground limestone is a kind of very important functional inorganic filling, is widely used in the industrial circles such as plastics, rubber, coating and papermaking.But water-ground limestone particle size distribution range is large, water regain is high, oil-absorption(number) is high, colourity is not white, purity is not high, be unfavorable for the tension of raising goods, resistance to compression, wear resisting property, therefore improve the product performance of traditional calcium carbonate, effectively can improve it at industrial circle application performances such as plastics, rubber, coating and papermaking.Develop the needs that a kind of highly pure active water-ground limestone is used for meeting novel material, new technology for this reason.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of highly pure active water-ground limestone, and described highly pure active ground calcium carbonate dispersing degree is high, particle size distribution range is little, colourity is high, purity is high.
In order to solve the problem, technical scheme of the present invention is a kind of highly pure active water-ground limestone, and its preparation process is as follows:
1) calcite is sent in shredder after mechanical disintegration grind, obtain calcium carbonate meal;
2) meal after grinding is added water and sends in shredder, the meal after grinding and the mass ratio of water are 2:1 ~ 1.5, then adopt wet grinding technique to grind, and obtain calcium carbonate work in-process;
3) stearic acid and calcium stearate mixture to be added in calcium carbonate work in-process as properties-correcting agent and carry out modification, then carrying out drying treatment;
4) finally the calcium carbonate after modification is sent into the screening of strong magnetic stripe sieve powder case, finished product highly pure active water-ground limestone can be obtained.
Further, described step 2) in technique adopt be secondary wet grinding technique.
Further, described step 2) in one-level grinding be first by the flow rate control of slurry at 5t/h, and add dispersion agent in process of lapping, secondary grinder is that the slurry after one-level being ground grinds again, the flow rate control of slurry at 3t/h, and adds dispersion agent in process of lapping.
Further, described step 2) in dispersion agent be sodium polyacrylate.
Further, described step 2) in dispersion agent be the amount of 0.4% calcium carbonate mixing liquid in the amount of one-level process of lapping, be the amount of 0.3% calcium carbonate mixing liquid in the amount of secondary grinder process.
Further, the properties-correcting agent in described step 3) is that stearic acid and calcium stearate mix with arbitrary proportion, and the amount of properties-correcting agent is 0.5 ~ 2:100 with calcium carbonate work in-process ratio.
Beneficial effect of the present invention: adopt physical method grinding to obtain water-ground limestone, the ground calcium carbonate dispersing degree adopting wet grinding to prepare is high, particle size distribution range is little, especially after secondary wet process grinding, performance is better, and the Paris white purity simultaneously after the screening of strong magnetic stripe sieve powder case is high, colourity is white.
Embodiment
A preparation method for highly pure active water-ground limestone, first sends into calcite in shredder and grinds, obtain calcium carbonate meal after mechanical disintegration; 50kg meal after grinding added 25kg water and sending in shredder, then is adopting wet grinding technique to grind, obtaining calcium carbonate work in-process; Stearic acid and calcium stearate mixture 0.5kg to be added to as properties-correcting agent in calcium carbonate work in-process and to carry out modification, then carrying out drying treatment; Finally the calcium carbonate after modification is sent into the screening of strong magnetic stripe sieve powder case, finished product highly pure active water-ground limestone can be obtained, obtain that finished product purity is high, colourity is white.
In order to be that grinding effect is better, secondary wet grinding technique is adopted in process of lapping, one-level grinding be first by the flow rate control of slurry at 5t/h, and dispersion agent is added in process of lapping, secondary grinder is that the slurry after one-level being ground grinds again, the flow rate control of slurry at 3t/h, and adds dispersion agent in process of lapping; This dispersion agent is sodium polyacrylate, and in one-level process of lapping, the amount of dispersion agent is the amount of 0.2kg calcium carbonate mixing liquid, and in secondary grinder process, the amount of dispersion agent is the amount of 0.15kg calcium carbonate mixing liquid; The mode adopting limit, grinding limit, limit to add dispersion agent can allow the calcium carbonate dispersity after grinding high, and particle size distribution range is little.
The Product Activity that finally obtains is high, performance is better to adopt stearic acid and calcium stearate can make as properties-correcting agent.
Above one embodiment of the present of invention have been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalizations done according to the invention application range change and improve, and still all should belong to patent covering scope of the present invention.
Claims (6)
1. a highly pure active water-ground limestone, is characterized in that, its preparation process is as follows:
1) calcite is sent in shredder after mechanical disintegration grind, obtain calcium carbonate meal;
2) meal after grinding is added water and sends in shredder, the meal after grinding and the mass ratio of water are 2:1 ~ 1.5, then adopt wet grinding technique to grind, and obtain calcium carbonate work in-process;
3) stearic acid and calcium stearate mixture to be added in calcium carbonate work in-process as properties-correcting agent and carry out modification, then carrying out drying treatment;
4) finally the calcium carbonate after modification is sent into the screening of strong magnetic stripe sieve powder case, finished product highly pure active water-ground limestone can be obtained.
2. highly pure active water-ground limestone according to claim 1, is characterized in that, described step 2) in technique adopt be secondary wet grinding technique.
3. highly pure active water-ground limestone according to claim 2, it is characterized in that, described step 2) in one-level grinding be first by the flow rate control of slurry at 5t/h, and dispersion agent is added in process of lapping, secondary grinder is that the slurry after one-level being ground grinds again, the flow rate control of slurry at 3t/h, and adds dispersion agent in process of lapping.
4. highly pure active water-ground limestone according to claim 3, is characterized in that, described step 2) in dispersion agent be sodium polyacrylate.
5. highly pure active water-ground limestone according to claim 4, is characterized in that, described step 2) in dispersion agent be the amount of 0.4% calcium carbonate mixing liquid in the amount of one-level process of lapping, be the amount of 0.3% calcium carbonate mixing liquid in the amount of secondary grinder process.
6. highly pure active water-ground limestone according to claim 5, is characterized in that, the properties-correcting agent in described step 3) is that stearic acid and calcium stearate mix with arbitrary proportion, and the amount of properties-correcting agent is 0.5 ~ 2:100 with calcium carbonate work in-process ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151044.4A CN105001674A (en) | 2014-04-15 | 2014-04-15 | High-purity activated heavy calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151044.4A CN105001674A (en) | 2014-04-15 | 2014-04-15 | High-purity activated heavy calcium carbonate |
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| CN105001674A true CN105001674A (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410151044.4A Pending CN105001674A (en) | 2014-04-15 | 2014-04-15 | High-purity activated heavy calcium carbonate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399130A (en) * | 2015-12-08 | 2016-03-16 | 四川亿欣新材料有限公司 | Production technology of ground limestone |
| CN105753032A (en) * | 2016-03-26 | 2016-07-13 | 南召鑫泰钙业有限公司 | Production process for heavy nano calcium carbonate |
| CN108147445A (en) * | 2017-12-21 | 2018-06-12 | 山东和信化工集团有限公司 | A kind of preparation process of the compound powdered whiting of modification for papermaking |
| CN108410212A (en) * | 2018-03-02 | 2018-08-17 | 宜昌富饶新材料科技有限公司 | A kind of powdered whiting and preparation method and the application in ink jet printing PVC calendered films |
| CN110643202A (en) * | 2019-08-07 | 2020-01-03 | 宜兴市涂门纳米新材料有限公司 | Special nanometer superfine calcium carbonate for wall |
| CN114196233A (en) * | 2021-11-30 | 2022-03-18 | 贺州市耀德粉体有限公司 | Surface wet treatment process of calcium carbonate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492310A (en) * | 2011-12-20 | 2012-06-13 | 广西华纳新材料科技有限公司 | Surface treatment method of nano-calcium carbonate used for polyvinyl chloride plastisol |
| CN102876086A (en) * | 2012-08-29 | 2013-01-16 | 池州凯尔特纳米科技有限公司 | Wet-process surface treatment method for superfine heavy calcium carbonate |
| CN103525136A (en) * | 2013-09-17 | 2014-01-22 | 池州市大恒生化有限公司 | Preparation method of ultrafine modified ground calcium carbonate |
-
2014
- 2014-04-15 CN CN201410151044.4A patent/CN105001674A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492310A (en) * | 2011-12-20 | 2012-06-13 | 广西华纳新材料科技有限公司 | Surface treatment method of nano-calcium carbonate used for polyvinyl chloride plastisol |
| CN102876086A (en) * | 2012-08-29 | 2013-01-16 | 池州凯尔特纳米科技有限公司 | Wet-process surface treatment method for superfine heavy calcium carbonate |
| CN103525136A (en) * | 2013-09-17 | 2014-01-22 | 池州市大恒生化有限公司 | Preparation method of ultrafine modified ground calcium carbonate |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399130A (en) * | 2015-12-08 | 2016-03-16 | 四川亿欣新材料有限公司 | Production technology of ground limestone |
| CN105753032A (en) * | 2016-03-26 | 2016-07-13 | 南召鑫泰钙业有限公司 | Production process for heavy nano calcium carbonate |
| CN108147445A (en) * | 2017-12-21 | 2018-06-12 | 山东和信化工集团有限公司 | A kind of preparation process of the compound powdered whiting of modification for papermaking |
| CN108147445B (en) * | 2017-12-21 | 2019-11-15 | 山东和信化工集团有限公司 | A kind of preparation process of the compound powdered whiting of modification for papermaking |
| CN108410212A (en) * | 2018-03-02 | 2018-08-17 | 宜昌富饶新材料科技有限公司 | A kind of powdered whiting and preparation method and the application in ink jet printing PVC calendered films |
| CN108410212B (en) * | 2018-03-02 | 2020-08-11 | 宜昌富饶新材料科技有限公司 | Heavy calcium carbonate, preparation method and application thereof in ink-jet printing PVC (polyvinyl chloride) calendered film |
| CN110643202A (en) * | 2019-08-07 | 2020-01-03 | 宜兴市涂门纳米新材料有限公司 | Special nanometer superfine calcium carbonate for wall |
| CN114196233A (en) * | 2021-11-30 | 2022-03-18 | 贺州市耀德粉体有限公司 | Surface wet treatment process of calcium carbonate |
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Application publication date: 20151028 |
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