CN104477961A - Preparation method of high-purity fine calcium carbonate - Google Patents
Preparation method of high-purity fine calcium carbonate Download PDFInfo
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- CN104477961A CN104477961A CN201410800591.0A CN201410800591A CN104477961A CN 104477961 A CN104477961 A CN 104477961A CN 201410800591 A CN201410800591 A CN 201410800591A CN 104477961 A CN104477961 A CN 104477961A
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- calcium carbonate
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Inorganic Chemistry (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a preparation method of high-purity fine calcium carbonate. According to the preparation method, limestone is calcined at the high temperature to prepare lime, lime milk is prepared after water is added to the lime and the lime is slaked, calcium carbonate is obtained after lime milk is carbonized, calcium carbonate is subjected to a series of reactions such as grinding, drying and the like, and fine-grained calcium carbonate is extracted. The preparation method has the characteristics of simple process, low impurity content, high product purity, mild reaction condition, easiness in industrial production and the like.
Description
Technical field
The invention belongs to chemical preparation field, that be specifically related to is a kind of preparation method of high purity fine calcium carbonate.
Background technology
Calcium carbonate mainly plays a part to brighten in the application of food, because some food raw material color is partially dark or partially black, causes the food of working it out not reach requirement in visual effect.So add a certain amount of calcium carbonate can play whitening effect in this based food, increase the visual effect of product, thus reach consumer demand.
Calcium carbonate not only as the effect of brightening but also can also can use as raising agent at food, adds appropriate calcium carbonate and can play and brighten and fluffy effect in some flour products.
Calcium carbonate can also as accessory substance, solidifying agent, anti-caking agent, chewy gum auxiliary agent, calsium supplement and properties-correcting agent in some food.
Calcium carbonate emerged rapidly as a kind of new additive and is subject to the favor of many enterprises because it is inexpensive in several years.
Summary of the invention
The object of the invention is to the above problem overcoming prior art existence, a kind of preparation method of high purity fine calcium carbonate is provided, can as the material of edible additive.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A preparation method for high purity fine calcium carbonate, comprises the following steps:
Wingdale is at high temperature calcined generation calcium oxide by step 1);
Step 2) add water digestion lime, generates milk of lime;
The milk of lime 100-300 eye mesh screen removal of impurities that step 2 obtains by step 3), through hydrocyclone, obtain meticulous calcium hydroxide;
Step 4) passes into purification kiln gas in calcium hydroxide, makes the pH value of lime cream soliquoid constantly drop to white water slurries and generates;
The natural sedimentation of step 5) white water slurries, filter plant dehydration, drying and processing 0.5-1h at 100 DEG C-115 DEG C, then carry out dry grinding and break up, grinding rate is 1300r/min-1500r/min, obtains particulate calcium carbonate after sieving.
Further, the temperature that described step 1 is carried out is got between 850 DEG C-1200 DEG C.
Further, in described step 2 mass ratio of water and lime between 3:1-5:1.
Further, described step 4 is worked as lime cream soliquoid pH value and is reached 6.8-7.2, and carbonization reaches terminal.
Further, described step 4 carbonic acid gas passes into speed between 3-10 liter/min, and in purification kiln gas, the content of carbonic acid gas is between 30%-36%.
Further, the temperature of reaction of described step 4 is got between 28 DEG C-40 DEG C, and the reaction times is between 2-8h.
Further, described step 5 bake out temperature is between 100 DEG C-115 DEG C, and the treatment time, grinding rate was at 1300r/min-1500r/min at 0.5-1h.
The invention has the beneficial effects as follows:
Preparation method of the present invention is simple, and running cost is low, low in the pollution of the environment, and obtained calcium carbonate microparticle is little, can use as foodstuff additive.
Embodiment
Below in conjunction with embodiment, describe the present invention in detail.
A preparation method for high purity fine calcium carbonate, comprises the following steps:
Wingdale is calcined and is generated calcium oxide by step 1) at 850 DEG C-1200 DEG C;
Step 2) add water digestion lime, generates milk of lime;
The milk of lime 100-300 eye mesh screen removal of impurities that step 2 obtains by step 3), through hydrocyclone, obtain meticulous calcium hydroxide;
Step 4) passes into purification kiln gas with speed 3-10 liter/min between 28 DEG C-40 DEG C in calcium hydroxide, in purification kiln gas, the content of carbonic acid gas is between 30%-36%, reaction 5-8h, when lime cream soliquoid pH value constantly decline reach 6.8-7.2 time, carburizing reagent stops, and obtains white water slurries;
The natural sedimentation of step 5) white water slurries, filter plant dehydration, drying and processing 0.5-1h at 100 DEG C-115 DEG C, then carry out dry grinding and break up, grinding rate is 1300r/min-1500r/min, obtains particulate calcium carbonate after sieving.
Further, in described step 2 mass ratio of water and lime between 3:1-5:1.
Embodiment 1
The Wingdale getting 200kg calcines the calcium oxide generating 80kg at 850 DEG C, with 100 object screen cloth removal of impurities, hydrocyclone is adopted to isolate the meticulous calcium oxide of 42kg, the water adding 130kg in calcium oxide digests, generate the milk of lime of 40kg, purification kiln gas is passed into speed 3 liters/min in milk of lime, in purification kiln gas, the content of carbonic acid gas is 30%, after reaction 5, the pH value of milk of lime reaches 6.8, generate white water slurries, by the natural sedimentation of white water slurries, filter plant dewaters, drying and processing 0.5h at 100 DEG C, carry out dry grinding again to break up, grinding rate is 1300r/min, the particulate calcium carbonate of 20kg is obtained after sieving.
Embodiment 2
The Wingdale getting 200kg calcines the calcium oxide generating 90kg at 1000 DEG C, with 200 object screen cloth removal of impurities, hydrocyclone is adopted to isolate the meticulous calcium oxide of 50kg, the water adding 150kg in calcium oxide digests, generate the milk of lime of 50kg, purification kiln gas is passed into speed 6 liters/min in milk of lime, in purification kiln gas, the content of carbonic acid gas is 34%, react the pH value of milk of lime after 5 hours and reach 7, generate white water slurries, by the natural sedimentation of white water slurries, filter plant dewaters, drying and processing 0.7h at 110 DEG C, carry out dry grinding again to break up, grinding rate is 1400r/min, the particulate calcium carbonate of 30kg is obtained after sieving.
Embodiment 3
The Wingdale getting 200kg calcines the calcium oxide generating 85kg at 1200 DEG C, with 300 object screen cloth removal of impurities, hydrocyclone is adopted to isolate the meticulous calcium oxide of 35kg, the water adding 115kg in calcium oxide digests, generate the milk of lime of 40kg, purification kiln gas is passed into speed 10 liters/min in milk of lime, in purification kiln gas, the content of carbonic acid gas is 36%, react the pH value of milk of lime after 6 hours and reach 7.2, generate white water slurries, by the natural sedimentation of white water slurries, filter plant dewaters, drying and processing 1h at 115 DEG C, carry out dry grinding again to break up, grinding rate is 1500r/min, the particulate calcium carbonate of 21kg is obtained after sieving.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a preparation method for high purity fine calcium carbonate, is characterized in that, comprises the following steps:
Wingdale is at high temperature calcined generation calcium oxide by step 1);
Step 2) add water digestion lime, generates milk of lime;
The milk of lime 100-300 eye mesh screen removal of impurities that step 2 obtains by step 3), through hydrocyclone, obtain meticulous calcium hydroxide;
Step 4) passes into purification kiln gas in calcium hydroxide, makes the pH value of lime cream soliquoid constantly drop to white water slurries and generates;
The natural sedimentation of step 5) white water slurries, filter plant dehydration, drying and processing, then carry out dry grinding and break up, obtain particulate calcium carbonate after sieving.
2. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: the temperature that described step 1 is carried out is got between 850 DEG C-1200 DEG C.
3. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: in described step 2, the mass ratio of water and lime is between 3:1-5:1.
4. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: described step 4 is worked as lime cream soliquoid pH value and reached 6.8-7.2, and carbonization reaches terminal.
5. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: described step 4 carbonic acid gas passes into speed between 3-10 liter/min, and in purification kiln gas, the content of carbonic acid gas is between 30%-36%.
6. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: the temperature of reaction of described step 4 is got between 28 DEG C-40 DEG C, and the reaction times is between 2-8h.
7. the preparation method of high density fine calcium carbonate according to claim 1, is characterized in that: described step 5 bake out temperature is between 100 DEG C-115 DEG C, and the treatment time, grinding rate was at 1300r/min-1500r/min at 0.5-1h.
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| CN201410800591.0A CN104477961A (en) | 2014-12-22 | 2014-12-22 | Preparation method of high-purity fine calcium carbonate |
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| CN201410800591.0A CN104477961A (en) | 2014-12-22 | 2014-12-22 | Preparation method of high-purity fine calcium carbonate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621379A (en) * | 2016-04-13 | 2016-06-01 | 四川绵竹市盘龙矿物质有限责任公司 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
| CN107416884A (en) * | 2017-09-30 | 2017-12-01 | 广西华洋矿源材料有限公司 | A kind of production method of high-quality superfine light calcium carbonate |
| CN110372023A (en) * | 2019-06-19 | 2019-10-25 | 常熟美特钙业有限公司 | A kind of zero lime-ash discharge technology in light calcium production process |
| CN111393879A (en) * | 2020-04-20 | 2020-07-10 | 池州市贵兴非矿新材料有限公司 | Light calcium carbonate modification process |
| CN111620359A (en) * | 2020-05-18 | 2020-09-04 | 河南鑫泰钙业有限公司 | Novel ultra-pure ultra-white large-sediment light calcium carbonate and production equipment and method thereof |
| CN111909539A (en) * | 2020-06-18 | 2020-11-10 | 芜湖卓越纳米新材料股份有限公司 | Industrial preparation method for improving affinity of nano calcium carbonate for adhesive |
| CN112142086A (en) * | 2020-09-11 | 2020-12-29 | 安徽杨柳青钙业科技股份有限公司 | Preparation method of light calcium carbonate |
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| JPS5354200A (en) * | 1976-10-28 | 1978-05-17 | Sumitomo Cement Co | Process for producing high class calcium carbonate |
| CN1392101A (en) * | 2002-07-29 | 2003-01-22 | 上海天福机电化工技术研究所 | Process for producing nano calcium carbonate by ultrasonic cavitation technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621379A (en) * | 2016-04-13 | 2016-06-01 | 四川绵竹市盘龙矿物质有限责任公司 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
| CN107416884A (en) * | 2017-09-30 | 2017-12-01 | 广西华洋矿源材料有限公司 | A kind of production method of high-quality superfine light calcium carbonate |
| CN110372023A (en) * | 2019-06-19 | 2019-10-25 | 常熟美特钙业有限公司 | A kind of zero lime-ash discharge technology in light calcium production process |
| CN111393879A (en) * | 2020-04-20 | 2020-07-10 | 池州市贵兴非矿新材料有限公司 | Light calcium carbonate modification process |
| CN111620359A (en) * | 2020-05-18 | 2020-09-04 | 河南鑫泰钙业有限公司 | Novel ultra-pure ultra-white large-sediment light calcium carbonate and production equipment and method thereof |
| CN111620359B (en) * | 2020-05-18 | 2024-04-26 | 河南鑫泰钙业有限公司 | Ultra-pure ultra-white heavy body light calcium carbonate and production equipment and method thereof |
| CN111909539A (en) * | 2020-06-18 | 2020-11-10 | 芜湖卓越纳米新材料股份有限公司 | Industrial preparation method for improving affinity of nano calcium carbonate for adhesive |
| CN112142086A (en) * | 2020-09-11 | 2020-12-29 | 安徽杨柳青钙业科技股份有限公司 | Preparation method of light calcium carbonate |
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