CN1039402C - Wet process for superfine heavy calcium carbonate - Google Patents
Wet process for superfine heavy calcium carbonate Download PDFInfo
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- CN1039402C CN1039402C CN95108710A CN95108710A CN1039402C CN 1039402 C CN1039402 C CN 1039402C CN 95108710 A CN95108710 A CN 95108710A CN 95108710 A CN95108710 A CN 95108710A CN 1039402 C CN1039402 C CN 1039402C
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- water
- calcium carbonate
- heavy calcium
- dispersion agent
- superfine heavy
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Abstract
The present invention relates to a wet method for preparing superfine heavy calcium carbonate. The method comprises the following steps of mixing, stirring, dispersing and sanding water, dispersing agents and heavy calcium carbonate powder, the dispersing agents are formed by mixing 40 to 20% of sodium polyacrylate with the molecular weight of 1000 to 2000 and 60 to 80% of water, and the proportion of the dispersing agents to the heavy calcium carbonate is from 5:1000 to 40:1000. The final products produced with the method of the present invention have the advantages of no other inorganic substances, low energy consumption, low operation cost and simple process, the product grains with the grain diameter of smaller than 2 mu account for more than 90%, and the product grains with the grain diameter of smaller than 5 mu account for 100%.
Description
A kind of wet method prepares the method for superfine heavy calcium carbonate, relates to the breaking method that uses additive to help pulverize method, the especially water-ground limestone of inorganic mineral.
The enterprise that domestic production at present prepares natural whiting is a lot, but high very little of quality, and the overwhelming majority still rests on raw material roughing 400 orders, the 800 purpose goods.Main some the dry process modes such as ball milling, vibration mill that adopt.United States Patent (USP) has disclosed a kind of technology that adopts the wet-milling mode to handle natural carbonate for No. 4606503.Its principal feature is exactly the Buddhist stone of adding 0.05～3.0%.In the course of processing, also add simultaneously chemical dispersant.Yet in the disclosed technical scheme of above-mentioned patent, the solid content of sand milling magma can only reach about 64% on the one hand, so efficient is bigger than end energy consumption; The following particle of handling through this method of carbonate 2 μ can only reach the level greater than 20% on the other hand, and particle size distribution range extensively is difficult to reach the superfine effect; The 3rd, in magma, introduced other inorganicss.
The purpose of this invention is to provide the method that a kind of wet method prepares superfine heavy calcium carbonate, adopt the handled product of this method can reach ultra-fine level.
According to above-mentioned purpose, the present invention adopts such technical scheme: water, dispersion agent, heavy calcium carbonate are mixed dispersed with stirring.Wherein dispersion agent is the sodium polyacrylate solution of molecular weight 1000～2000, and dispersion agent is 9～40: 1000 with the ratio of water-ground limestone.Mixture with water, dispersion agent, heavy calcium carbonate carries out sand milling then.
For raising the efficiency and quality product, should under high solids content, carry out sand milling, selecting water is 280～425: 1000 with the water-ground limestone ratio, and solid content is brought up to more than 64%.
Therefore the present invention has following advantage: 1. do not introduce other inorganicss in the finished product owing to adopt dispersion agent, water, the water-ground limestone of suitable proportion that water-ground limestone is carried out the wet method sand milling; 2. the finished product account for more than 60% less than 2 μ, and 100% less than 5 μ; 3. energy consumption is lower; 4. production technique is simple, running cost is low, pollution-free.
Accompanying drawing is the process flow sheet according to the processing method of the present invention's proposition.
The present invention is further illustrated below in conjunction with drawings and Examples.
In the technology of wet method sand milling water-ground limestone, no matter be from sand grinding process itself, still to the distribution of sizes of the finished product, general all hope has higher solid content.But the increase with solid content has produced new problem again, i.e. the viscosity increase of magma is very remarkable, if do not add dispersion agent then solid content reach at 50% o'clock and be difficult to carry out sand milling.The existing dispersion agent of adding, quantity few (below 4%) then are difficult to reach dispersion effect under high solids content; If addition increases, then cause foreign matter increase in the finished product.It is dispersion agent with the mixture of sodium polyacrylate that the present invention then adopts water.Wherein sodium polyacrylate accounts for 40～20%, and water accounts for 60～80%.Dispersion agent is 13-40 with the ratio of water-ground limestone: 1000.To select water be 380-425 with the ratio of water-ground limestone in order to carry out sand milling under high solids content: 1000, and solid content is brought up to more than 64%.For further specifying of the influence of each changes in process parameters, can see table quality product:
| Coarse whiting CaCO3 kg | Dispersion agent kg | Water kg | The flow liter/minute | ＜2 μ quality product % |
| 1000 | 9 | 419.6 | 2 | 79.4 |
| 3 | 63.0 | |||
| 1000 | 13 | 415.6 | 2 | 89.6 |
| 3 | 87.3 | |||
| 4 | 84.9 | |||
| 5 | 70.5 | |||
| 6 | 66.3 | |||
| 7 | 60.1 |
| Coarse whiting CaCO3 kg | Dispersion agent kg | Water kg | The flow liter/minute | ＜2 μ quality product % |
| 1000 | 17 | 411.6 | 2 | 93.1 |
| 3 | 92.7 | |||
| 4 | 92.3 | |||
| 5 | 88.4 | |||
| 6 | 84.4 | |||
| 7 | 79.8 | |||
| 1000 | 21 | 407.6 | 2 | 93.7 |
| 3 | 93.1 | |||
| 4 | 92.5 | |||
| 5 | 89.3 | |||
| 6 | 87.4 | |||
| 7 | 81.5 | |||
| 1000 | 25 | 403.6 | 2 | 92.4 |
| 3 | 93.0 | |||
| 4 | 93.1 | |||
| 5 | 89.8 | |||
| 6 | 84.6 | |||
| 7 | 82.1 | |||
| 1000 | 29 | 399.6 | 2 | 94.1 |
| 3 | 93.4 | |||
| 4 | 93.3 | |||
| 5 | 92.1 | |||
| 6 | 90.8 | |||
| 7 | 89.3 |
| Coarse whiting CaCO3 kg | Dispersion agent kg | Water kg | The flow liter/minute | ＜2 μ quality product % |
| 1000 | 33 | 395.6 | 2 | 94.3 |
| 3 | 93.9 | |||
| 4 | 93.7 | |||
| 5 | 92.5 | |||
| 6 | 91.9 | |||
| 7 | 91.4 | |||
| 1000 | 37 | 391.6 | 2 | 93.1 |
| 3 | 92.0 | |||
| 4 | 91.7 | |||
| 5 | 90.1 | |||
| 6 | 88.3 | |||
| 7 | 87.6 | |||
| 1000 | 40 | 387.6 | 2 | 93.9 |
| 3 | 92.3 | |||
| 4 | 91.1 | |||
| 5 | 90.5 | |||
| 6 | 88.4 | |||
| 7 | 84.7 |
By in the table as can be known, under other parameter constant situations, increase with dispersant dosage, also increase less than 2 μ quality producies, but be increased to a certain degree, again to some extent down with.At solid content is 70% o'clock, and dispersion agent is 14: 1000 with the ratio of water-ground limestone.The variation of flow is then decided according to the particular case of sand mill, is generally 2～7 liters/minute.The fineness analysis of the finished product is adopted the TZC-2 type to write down sedimentograph automatically to record in last table.
Process flow sheet is referring to accompanying drawing.At first with water, dispersion agent, matter lime carbonate be poured into successively in the dispersion tank (1) and disperses, squeeze in the hold tank (2) with pump again.Then the magma in the hold tank is pumped into sand milling in the sand mill (3).Preferably adopt repeatedly the mode of sand milling, can carry out sand milling three times, to obtain granular size high conformity, ultrafine the finished product.
Claims (3)
1, a kind of wet method prepares the method for superfine heavy calcium carbonate, at first water, dispersion agent, heavy calcium carbonate are mixed dispersed with stirring, sand milling then, the weight ratio that it is characterized in that dispersion agent and water-ground limestone is 13～40: 1000, the weight ratio of water and water-ground limestone is 380～425: 1000, and described dispersion agent is the sodium polyacrylate solution of molecular weight 1000～2000.
2, the method for preparing superfine heavy calcium carbonate according to claim 1 is characterized in that sodium polyacrylate solution is made of 40～20% sodium polyacrylate and 60～80% water.
3, the method for preparing superfine heavy calcium carbonate according to claim 1 is characterized in that the flow in the sand grinding process is 2～7 liters/minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108710A CN1039402C (en) | 1995-07-25 | 1995-07-25 | Wet process for superfine heavy calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108710A CN1039402C (en) | 1995-07-25 | 1995-07-25 | Wet process for superfine heavy calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1122309A CN1122309A (en) | 1996-05-15 |
| CN1039402C true CN1039402C (en) | 1998-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95108710A Expired - Fee Related CN1039402C (en) | 1995-07-25 | 1995-07-25 | Wet process for superfine heavy calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039402C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419032C (en) * | 2005-01-05 | 2008-09-17 | 上海东升新材料有限公司 | Heavy calcium carbonate filling preparation method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100204117B1 (en) * | 1996-09-11 | 1999-06-15 | 유규재 | Process for manufacture of calsium carbonate |
| CN100341785C (en) * | 2005-07-27 | 2007-10-10 | 湖州吴兴恒联碳酸钙厂 | Method for preparing submicron heavy calcium carbonate |
| CN103525129A (en) * | 2013-01-24 | 2014-01-22 | 长春天成高新纳米复合材料有限公司 | Preparation method of special-purpose nanometer modifier of water-based coating |
| CN105399130B (en) * | 2015-12-08 | 2017-08-25 | 四川亿欣新材料有限公司 | A kind of production technology of powdered whiting |
| CN107043556A (en) * | 2017-04-17 | 2017-08-15 | 华东理工大学 | A kind of preparation method of the narrow coarse whiting of particle diameter distribution |
| CN109650434B (en) * | 2017-12-28 | 2021-06-22 | 包头市宏博特科技有限责任公司 | Preparation process of small-particle-size cerium carbonate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606503A (en) * | 1982-12-14 | 1986-08-19 | Columbia River Carbonates | Process for wet grinding of natural and synthetic carbonates |
| JPS63233011A (en) * | 1986-11-07 | 1988-09-28 | Nippon Shokubai Kagaku Kogyo Co Ltd | Production of calcium carbonate aqueous dispersion |
-
1995
- 1995-07-25 CN CN95108710A patent/CN1039402C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606503A (en) * | 1982-12-14 | 1986-08-19 | Columbia River Carbonates | Process for wet grinding of natural and synthetic carbonates |
| JPS63233011A (en) * | 1986-11-07 | 1988-09-28 | Nippon Shokubai Kagaku Kogyo Co Ltd | Production of calcium carbonate aqueous dispersion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419032C (en) * | 2005-01-05 | 2008-09-17 | 上海东升新材料有限公司 | Heavy calcium carbonate filling preparation method |
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| Publication number | Publication date |
|---|---|
| CN1122309A (en) | 1996-05-15 |
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