CN1042522C - Method for preparation of superfine ground calcium carbonate - Google Patents
Method for preparation of superfine ground calcium carbonate Download PDFInfo
- Publication number
- CN1042522C CN1042522C CN94104018A CN94104018A CN1042522C CN 1042522 C CN1042522 C CN 1042522C CN 94104018 A CN94104018 A CN 94104018A CN 94104018 A CN94104018 A CN 94104018A CN 1042522 C CN1042522 C CN 1042522C
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- China
- Prior art keywords
- calcium carbonate
- preparation
- ground calcium
- superfine
- superfine ground
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Abstract
The present invention relates to a method and equipment for preparing superfine ground calcium carbonate. The preparation method comprises the following steps: rough processing of raw material, fine grinding, dregs removing, flocculation by using amide flocculating agents and dehydration. The equipment mainly comprises a Raymond mill, a superfine grinding machine, a vibration screen and a plate frame press filter. The grain size of the superfine ground calcium carbonate prepared by the present invention is less than 2 mu m, and the grain content can reach from 90 to 97.5%. The superfine ground calcium carbonate has the characteristics of high solid content, low viscosity, high brightness, fine grain diameter, etc., and can change the rheological property of paint.
Description
The present invention is a kind of preparation method of grinding calcium carbonate, particularly relates to a kind of preparation method and equipment used thereof of papermaking paint level natural superfine grinding calcium carbonate.
Along with the raising of people's living standard, beautify life, decorative environment become increasing people's care focus, and like this, the Technology Need of converted paper and printing industry constantly improves the consumption requirement that could satisfy numerous people.
Extra-fine grinding calcium carbonate is as a kind of basic pigment of coating in the White Board, has the whiteness height, viscosity is low, absorption of inks good, and characteristics such as opaqueness height have extensively been adopted in the world, and particularly since the eighties, the usage quantity of grinding calcium carbonate is increasing.At present, granularity does not also have in that the extra-fine grinding calcium carbonate more than 90% is domestic less than the granule content of 2 μ m, the manufacturer of minority is with the grinding calcium carbonate of wet production, granularity can only reach 60-70% less than the granule content of 2 μ m is the highest, and exist in the preparation process power consumption big, yield poorly, shortcoming such as technology is unreasonable, especially do not solve the dehydration problem of slimy grinding calcium carbonate, trucking costs is gone up, and the preparation that has influence on follow-up coating does not reach high solids content.In addition, all between the 325-400 order, do not reach of the requirement of papermaking paint level with the granularity major part of dry production grinding calcium carbonate far away with high-grade natural superfine grinding calcium carbonate.
An object of the present invention is to provide a kind of preparation method of superfine ground calcium carbonate that can produce the papermaking paint level.
Another object of the present invention provides the used equipment of a kind of above-mentioned preparation method.
The preparation method of this grinding calcium carbonate comprise with raw material carry out roughing, fine grinding, slagging-off, with flocculation of amides flocculation agent and dehydration.
Described roughing process is to roughly grind after fragmentation with raw material pulverizing or with raw material again.
Described fine grinding process is raw material fine grinding 20-150 minute after will roughly grinding with super grinder, makes its granularity reach 90-97.5% less than the granule content of 2 μ m.
Described flocculation process can add one or both poly-propionic acid amide flocculation agents, and the amount of general flocculation agent is the 1-100PPm of weight of calcium carbonate, different raw materials, flocculation agent consumption difference.This flocculation agent can adsorb complete isolating calcium carbonate particles, makes it to produce cotton-shaped suspensoid, is beneficial to the pressure dehydration, and this flocculation is spread out in follow-up use fully, shows its good flowability.
Described dehydration is that the lime carbonate that will flocculate dewaters to solid content and reaches more than 70%.
The preparation method of this grinding calcium carbonate is scientific and reasonable, products made thereby has characteristics such as high solids content, low viscosity, high brightness, fine grain size, after the use, can change the rheological of coating, easy handling reduces the scratch in the coating process, and paper of whiteness and glossiness all have raising, and its good ink absorption improves print gloss, and print speed increases.
The equipment that uses in described preparation method's process comprises Raymond mill, super grinder, vibratory screening apparatus and plate-and-frame filter press.
Can also comprise crusher and ball mill in the described equipment.
This preparation method equipment used is simple to operate, less investment, and products made thereby can make granularity reach 90-97.5% less than the granule content of 2 μ m.
The quality index of the grinding calcium carbonate that all excellent sub-Britain of products obtained therefrom quality index of the present invention ECC company produces, the comparison is as follows:
| The physical index name of product | Size-grade distribution (%) | Brightness (%) | Viscosity (cp5) | Solid content (%) | |
| ≤10μ | ≤2μ | ||||
| Britain ECC product | ?99.9 | ?95.0 | ?93.0 | ?500-900 | ?75.0 |
| Product of the present invention | ?100 | ?97.5 | ?96.0 | ?400-500 | ?75.1 |
The present invention will be further described below in conjunction with embodiment.
Embodiment
Raw material is roughly ground with ball mill after with crusher in crushing, raw material after corase grind enters super grinder and carefully ground 90 minutes, make its granularity reach 97% less than the granule content of 2 μ m, adopt vibratory screening apparatus to finish slagging-off again, with adding the poly-propionic acid amide of 60PPm in the lime carbonate after the slagging-off, make it carry out chemical treatment to the lime carbonate surface, reach the flocculation purpose, the lime carbonate that will flocculate with plate-and-frame filter press dewaters again, and its solid content is reached more than 70%.
Claims (4)
1, a kind of preparation method of superfine ground calcium carbonate, it is held and levies is that it comprises raw material roughing, fine grinding, slagging-off, flocculates and dehydration with the amides flocculation agent; Described flocculation agent is one or both poly-propionic acid amide flocculation agents; The amount of flocculation agent is the 1-100ppm of weight of calcium carbonate.
2, preparation method as claimed in claim 1 is characterized in that grinding 20-150 minute on super grinder on the fine grinding process.
3,, it is characterized in that it comprises Raymond mill, super grinder, vibratory screening apparatus and plate-and-frame filter press as any preparation method's equipment used of claim 1 to 2.
4, equipment as claimed in claim 3 is characterized in that roughing crusher, ball mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104018A CN1042522C (en) | 1994-04-15 | 1994-04-15 | Method for preparation of superfine ground calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104018A CN1042522C (en) | 1994-04-15 | 1994-04-15 | Method for preparation of superfine ground calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110253A CN1110253A (en) | 1995-10-18 |
| CN1042522C true CN1042522C (en) | 1999-03-17 |
Family
ID=5031381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94104018A Expired - Fee Related CN1042522C (en) | 1994-04-15 | 1994-04-15 | Method for preparation of superfine ground calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042522C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057981C (en) * | 1996-08-20 | 2000-11-01 | 翟立国 | Preparation of superfine active calcium carbonate |
| CN100418885C (en) * | 2004-07-09 | 2008-09-17 | 胡志彤 | High purity medicinal calcium carboante and its producing method |
| CN103408157B (en) * | 2013-05-13 | 2015-10-07 | 福建省万旗非金属材料有限公司 | Nm-class active calcium carbonate produce in the utilization process of press filtration waste water and equipment |
| CN103740137A (en) * | 2013-12-31 | 2014-04-23 | 上海东升新材料有限公司 | Preparation method of heavy calcium carbonate with narrow particle size |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980240A (en) * | 1975-04-11 | 1976-09-14 | Anglo-American Clays Corporation | Brightening of natural calcitic ores |
| JPH112888A (en) * | 1997-04-15 | 1999-01-06 | Konica Corp | Image forming method |
-
1994
- 1994-04-15 CN CN94104018A patent/CN1042522C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980240A (en) * | 1975-04-11 | 1976-09-14 | Anglo-American Clays Corporation | Brightening of natural calcitic ores |
| JPH112888A (en) * | 1997-04-15 | 1999-01-06 | Konica Corp | Image forming method |
Non-Patent Citations (1)
| Title |
|---|
| 无机盐工业，第5期总第72期 1985.5.10 王毓娥，"日本碳酸钙工业发展动向" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1110253A (en) | 1995-10-18 |
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