CN117623358B - Process and device for producing high-dispersion superfine active calcium carbonate - Google Patents
Process and device for producing high-dispersion superfine active calcium carbonate Download PDFInfo
- Publication number
- CN117623358B CN117623358B CN202311553859.0A CN202311553859A CN117623358B CN 117623358 B CN117623358 B CN 117623358B CN 202311553859 A CN202311553859 A CN 202311553859A CN 117623358 B CN117623358 B CN 117623358B
- Authority
- CN
- China
- Prior art keywords
- bin
- baffle
- slurry
- calcium carbonate
- calcium hydroxide
- 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.)
- Active
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 69
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 30
- 239000006185 dispersion Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 18
- 239000002002 slurry Substances 0.000 claims abstract description 65
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 55
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 40
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 40
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 40
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 15
- 239000000292 calcium oxide Substances 0.000 claims abstract description 10
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000019738 Limestone Nutrition 0.000 claims abstract description 5
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 5
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims abstract description 5
- 239000006028 limestone Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 32
- 238000003763 carbonization Methods 0.000 claims description 27
- 238000005261 decarburization Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 3
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 239000000945 filler Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 facial cleanser Substances 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Classifications
-
- 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
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a production process and a device of high-dispersion superfine active calcium carbonate, comprising the following steps of a, calcining limestone into quick lime; b. slaking quicklime with water to generate calcium hydroxide slurry, and removing impurities from the calcium hydroxide slurry; c. adding a dispersing agent of calcium ions into the calcium hydroxide slurry after impurity removal, and then introducing carbon dioxide to obtain carbonized slurry with the main component of calcium carbonate; d. adding an activating agent into the carbonized slurry; e. filtering, washing, drying, sieving and the like are carried out on the activated carbonized slurry to obtain a finished product; in the step c, the calcium hydroxide slurry after impurity removal is filled with pressurized carbon dioxide in a closed environment, and after a period of reaction, the calcium hydroxide slurry enters a negative pressure environment to stay for a period of time, so that carbonized slurry is obtained. The invention has the advantages of high production efficiency, good moisture resistance of the obtained finished product and small occupied area of the device.
Description
Technical Field
The invention belongs to the field of high-dispersion superfine active calcium carbonate, and particularly relates to a production process and a production device of high-dispersion superfine active calcium carbonate.
Background
The high-dispersion superfine active calcium carbonate is an important raw material in the modern chemical industry, and is mainly used as a filler to be applied to products such as high-grade cosmetics, facial cleanser, toothpaste, perfumed soap, medicines and the like.
The existing production process of the high-dispersion superfine active calcium carbonate mainly comprises the following steps of firstly, calcining limestone into quicklime; secondly, adding water into quicklime to carry out digestion reaction to generate calcium hydroxide slurry, and removing impurities; thirdly, adding a dispersing agent of calcium ions into the calcium hydroxide slurry after impurity removal, and then introducing carbon dioxide to obtain carbonized slurry with the main component of calcium carbonate; fourth, adding an activating agent into the carbonized slurry; fifth, the activated carbonized slurry is filtered, washed, dried, screened and the like to obtain a finished product.
After the high-dispersion superfine active calcium carbonate obtained by the existing production process is used as a filler to prepare related products, the phenomenon that the product is easy to deteriorate due to moisture absorption is caused, particularly, tablet products, after the product is wetted, the internal components can react, the environment is provided for bacteria breeding, the drug effect is easy to be reduced, and the use effect is poor.
Disclosure of Invention
The invention aims to provide a production process and a device of high-dispersion superfine active calcium carbonate. The invention has the advantages of high production efficiency, good moisture resistance of the obtained finished product and small occupied area of the device.
The technical scheme of the invention is as follows: the production process of high-dispersion superfine active calcium carbonate includes the following steps,
A. Calcining limestone into quicklime;
b. Slaking quicklime with water to generate calcium hydroxide slurry, and removing impurities from the calcium hydroxide slurry;
c. adding a dispersing agent of calcium ions into the calcium hydroxide slurry after impurity removal, and then introducing carbon dioxide to obtain carbonized slurry with the main component of calcium carbonate;
d. Adding an activating agent into the carbonized slurry;
e. filtering, washing, drying, sieving and the like are carried out on the activated carbonized slurry to obtain a finished product;
in the step c, the calcium hydroxide slurry after impurity removal is filled with pressurized carbon dioxide in a closed environment, and after a period of reaction, the calcium hydroxide slurry enters a negative pressure environment to stay for a period of time, so that carbonized slurry is obtained.
In the above process for producing high-dispersion superfine activated calcium carbonate, in the step c, the pressure of the closed environment is 1.5-2 atm.
In the above process for producing high-dispersion superfine active calcium carbonate, in the step c, the pressure of the negative pressure environment is 0.2-0.3 atm.
The production device for realizing the production process comprises a carbonization device used in the step c, wherein the carbonization device comprises a first bin and a second bin, the first bin is connected with a compressed carbon dioxide gas source through an air inlet joint, a carbonization channel is arranged in the first bin, the top of the first bin is connected with a feed hopper through a feed pipe, a first quantitative conveyor is arranged on the feed pipe, and the lower end of the feed pipe is connected with the feed end of the carbonization channel;
A decarburization channel is arranged in the second storage bin, a switching pipe connected with the discharge end of the carbonization channel is arranged at the top of the second storage bin, a second quantitative conveyor is arranged on the switching pipe, a discharge pipe is arranged at the discharge end of the decarburization channel, a third quantitative conveyor is arranged on the discharge pipe, and the second storage bin is connected with a vacuum device through an exhaust joint.
In the production device, one side of the bottom of the first bin is inwards sunken to form a two-stage step structure, the second bin is located at the lower-stage step, and the second quantitative conveyor is located at the upper-stage step.
In the production device, all be equipped with a plurality of vertical baffles in first feed bin and the second feed bin, the both sides of baffle all form the bin, and the top intercommunication of adjacent bin is equipped with the bin outlet, and the top of baffle is equipped with the feed inlet, and the feed inlet passes through the bin outlet that the volumetric pump connection corresponds.
In the production device, a plurality of inclined plates are arranged in the bin from top to bottom, the inclination directions of the adjacent inclined plates are opposite, and the adjacent inclined plates are respectively fixed on two side walls of the bin.
In the aforementioned apparatus for producing, first quantitative conveyer, second quantitative conveyer and third quantitative conveyer all include spherical casing, and one side of casing is equipped with the motor, is equipped with horizontal drive shaft in the casing, and the motor is connected to the one end of drive shaft, and the periphery of drive shaft is equipped with a plurality of semicircular revolving plates.
In the production device, a horizontal spray pipe is arranged at the feed inlet and is parallel to the partition plate, and a row of discharge ports and a plurality of discharge ports are arranged on two sides of the bottom of the spray pipe.
In the aforementioned apparatus for producing, the below of shower is equipped with the levelling device fixed with corresponding baffle, levelling device includes the open-top box body, and the middle part of box body is equipped with first baffle, and the both sides of first baffle all are equipped with the second baffle, and the top of second baffle is equipped with the third baffle, forms the overflow launder between second baffle and the second baffle, and the height of overflow launder is less than the top height of first baffle, and the lower extreme of third baffle is inwards bent, and the bottom both sides of box body all are equipped with a plurality of overflow holes that sharp was arranged.
Compared with the prior art, the invention improves the carbonization step on the basis of the existing production process, has low improvement cost, utilizes pressurized carbon dioxide to react with calcium hydroxide slurry, utilizes high-concentration carbon dioxide to participate in the first carbonization reaction of the calcium hydroxide slurry, improves the reaction speed of the calcium hydroxide slurry, improves the production efficiency, carries out vacuum treatment on the carbonized slurry, utilizes low-concentration carbon dioxide to participate in the second carbonization reaction of the calcium hydroxide slurry, ensures that the calcium hydroxide slurry is completely reacted, and in the second reaction, the carbon dioxide content in the calcium hydroxide slurry is low, the Ph value of the calcium hydroxide slurry is low, and avoids the reverse acid-base reaction of the generated calcium carbonate into calcium hydroxide, so that the finally obtained carbonized slurry basically does not contain calcium hydroxide, thereby the finally obtained finished product has good moisture resistance and the corresponding moisture resistance of the product produced by using the filler.
The applicant has found through long-time research that the important reason for the water absorption of the product prepared by taking the calcium carbonate obtained by the existing production process as the filler is that the calcium carbonate contains a small amount of calcium hydroxide, the water absorption of the calcium hydroxide is good, and although the proportion of the calcium carbonate is low, a plurality of capillary channels are established, and water vapor can reach the inside of the product along the capillary channels established by the calcium hydroxide, so that the product is damped. According to a simple comparison test, the calcium hydroxide content in the calcium carbonate obtained by the existing production process is 0.15%, and the calcium hydroxide content in the calcium carbonate obtained by the application is about 0.08%, and the calcium carbonate obtained by the application is used as a filler to prepare tablets, so that the time required for preparing the tablets from the calcium carbonate obtained by the application to be wetted is 1.5-2 times of the time required for preparing the tablets from the existing calcium carbonate to be wetted under the condition of reaching the same water content.
In addition, through the institutional advancement to apparatus for producing, make the material discharge after the backward flow repeatedly in two feed bins, on the basis of guaranteeing that reaction time is sufficient, reaction is complete, make whole apparatus for producing's area actively reduce. The materials can be flattened in flowing, the thickness is small in flowing, good conditions are further established for the reaction, and the purity of the finished product is strongly ensured.
In conclusion, the invention has the advantages of high production efficiency, good moisture resistance of the obtained finished product and small occupied area of the device.
Drawings
Fig. 1 is a schematic front view of a carbonization device.
Fig. 2 is a schematic rear view of the carbonization device.
Fig. 3 is a schematic elevational view of the first, second or third metering conveyor.
Fig. 4 is a schematic diagram of the structure of fig. 3 at B-B.
Fig. 5 is an enlarged view of fig. 1 at a.
Fig. 6 is a schematic top view of fig. 5.
The marks in the drawings are: 1-first bin, 2-second bin, 3-air inlet joint, 4-compressed carbon dioxide air source, 5-inlet pipe, 6-feeder hopper, 7-first quantitative conveyer, 8-transfer pipe, 9-second quantitative conveyer, 10-discharging pipe, 11-third quantitative conveyer, 12-exhaust joint, 13-vacuum equipment, 14-partition plate, 15-bin, 16-discharge opening, 17-feed opening, 18-volumetric pump, 19-sloping plate, 20-shell, 21-motor, 22-driving shaft, 23-rotating plate, 24-spray pipe, 25-discharge opening, 26-leveling device, 27-box body, 28-first baffle, 29-second baffle, 30-third baffle, 31-overflow tank, 32-overflow hole, 33-supporting leg.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Example 1. The production process of high-dispersion superfine active calcium carbonate includes the following steps,
A. Calcining limestone into quicklime;
b. Slaking quicklime with water to generate calcium hydroxide slurry, and removing impurities from the calcium hydroxide slurry;
c. adding a dispersing agent of calcium ions into the calcium hydroxide slurry after impurity removal, and then introducing carbon dioxide to obtain carbonized slurry with the main component of calcium carbonate;
d. Adding an activating agent into the carbonized slurry;
e. Filtering, washing, drying, sieving and the like are carried out on the activated carbonized slurry, so as to obtain a finished product.
The characteristics are as follows: in the step c, introducing pressurized carbon dioxide into the calcium hydroxide slurry subjected to impurity removal in a closed environment with the pressure of 1.5-2 atmospheres, reacting for a period of time, and then entering a negative pressure environment with the pressure of 0.2-0.3 atmosphere for a period of time to obtain carbonized slurry.
Example 2. The production device for realizing the production process of the high-dispersion superfine activated calcium carbonate in the embodiment 1 comprises a carbonization device used in the step c, wherein the carbonization device comprises a first storage bin 1 and a second storage bin 2, the first storage bin 1 is connected with a compressed carbon dioxide gas source 4 through an air inlet joint 3, the compressed carbon dioxide gas source 4 can be a liquefied carbon dioxide gas cylinder (existing), a pressure reducing valve or a constant pressure valve and a pressure gauge are arranged at an outlet of the gas cylinder, a carbonization channel is arranged in the first storage bin 1, the top of the first storage bin 1 is connected with a feed hopper 6 through a feed pipe 5, a first quantitative conveyor 7 is arranged on the feed pipe 5, and the lower end of the feed pipe 5 is connected with a feed end of the carbonization channel;
a decarburization channel is arranged in the second storage bin 2, a switching pipe 8 connected with the discharge end of the carbonization channel is arranged at the top of the second storage bin 2, a second quantitative conveyor 9 is arranged on the switching pipe 8, a discharge pipe 10 is arranged at the discharge end of the decarburization channel, a third quantitative conveyor 11 is arranged on the discharge pipe 10, and the second storage bin 2 is connected with a vacuum device 13 through an exhaust joint 12.
The bottom of the first bin 1 is recessed inwards to form a two-stage step structure, the second bin 2 is located at the lower-side step and is integrally located below the first bin 1, and the second quantitative conveyor 9 is located at the upper-stage step. The bottoms of the first bin 1 and the second bin 2 are provided with a plurality of supporting feet 33.
All be equipped with a plurality of vertical baffles 14 in first feed bin 1 and the second feed bin 2, the both sides of baffle 14 all form bin 15, and the top intercommunication of adjacent bin 15 is equipped with bin 16 in the bottom of bin 15, and the top of baffle 14 is equipped with feed inlet 17, and feed inlet 17 passes through volumetric pump 18 and corresponding pipe connection and corresponds bin 16.
A plurality of inclined plates 19 are arranged in the bin 15 from top to bottom, the inclination directions of the adjacent inclined plates 19 are opposite, and the adjacent inclined plates 19 are respectively fixed on two side walls of the bin 15. For the carbonization channel in the first storage bin 1, the feeding end of the carbonization channel is positioned at the top of the left-most storage chamber of the first storage bin 1, and the discharging end of the carbonization channel is positioned at the bottom of the right-most storage chamber of the first storage bin 1. For the decarburization channel in the second storage bin 2, the feeding end of the decarburization channel is positioned at the top of the right-most storage chamber of the second storage bin 2, and the discharging end of the carbonization channel is positioned at the bottom of the left-most storage chamber of the second storage bin 2. Taking the formation of carbonization channels as an example, the path is from the upper end of the leftmost bin 15, along the way, through each sloping plate 19 from top to bottom, to the bottom discharge port 16, through the corresponding volumetric pump 18, into the adjacent bin 15, and then down, so as to reciprocate through all bins 15 in the first bin 1, and reach the transfer tube 8. The formation mode of the decarburization channel is similar to that of the carbonization channel.
The first quantitative conveyor 7, the second quantitative conveyor 9 and the third quantitative conveyor 11 all comprise spherical shells 20, the upper side and the lower side of each shell 20 are respectively communicated with the upper part and the lower part of the feeding pipe 5, the transfer pipe 8 or the discharging pipe 10, one side of each shell 20 is provided with a motor 21, a horizontal driving shaft 22 is arranged in each shell 20, one end of each driving shaft 22 is connected with the motor 21, the periphery of each driving shaft 22 is provided with a plurality of semicircular rotating plates 23, and a plurality of chambers which are not communicated with each other are divided in the shells 20 through the rotating plates 23, so that the upper side and the lower side of each shell 20 are not communicated all the time. The motor 21 drives the driving shaft 22 to rotate, and the driving shaft 22 drives the rotating plate 23 to rotate, so that the materials on the upper side of the conveyor are transferred to the lower side of the conveyor.
The feed inlet 17 department is equipped with horizontal shower 24, and shower 24 is parallel with baffle 14, and shower 24's bottom both sides all are equipped with one row, a plurality of discharge ports 25 of every row. By changing the number ratio of the two rows of discharge openings 25, the flow ratio of the shower pipe 24 to the both side bins 15 can be adjusted, thereby adjusting the carbonization time of the slurry in the first bin 1.
The below of shower 24 is equipped with the levelling device 26 fixed with corresponding baffle 14, levelling device 26 includes open-top's box body 27, and the middle part of box body 27 is equipped with first baffle 28, and first baffle 28 both sides all are equipped with second baffle 29, and second baffle 29's top is equipped with third baffle 30, forms overflow launder 31 between second baffle 29 and the second baffle 29, and overflow launder 31's height is less than first baffle 28's top height, and the lower extreme of third baffle 30 is inwards bent, and box body 27's bottom both sides all are equipped with a plurality of overflow holes 32 that sharp was arranged.
Working principle: the carbon dioxide in the compressed carbon dioxide gas source 4 enters the first storage bin 1, so that the first storage bin 1 is filled with the carbon dioxide with the pressure of 1.5-2 atmospheres. The vacuum device 13 makes the second storage bin in a negative pressure state of 0.2-0.3 atmosphere,
The calcium hydroxide slurry after impurity removal is pumped into the feed hopper 6, enters the bin 15 at the left side of the first bin 1 through the first quantitative conveyor 7, flows to the bottom of the bin 15 under the guidance of the plurality of inclined plates 19, is lifted to the corresponding feed inlet 17 through the corresponding volumetric pump 18, is sprayed out from the spray pipe 24, part of slurry is discharged through the discharge outlet 25 at the left side, returns to the original bin 15, and the rest of slurry is discharged through the discharge outlet 25 at the right side, enters the bin 15 at the next stage, and reacts with carbon dioxide to produce carbonized slurry in the slurry flowing process. The process is repeated, the carbonized slurry is discharged from the right-most bin 15, enters the second bin 2 through the transfer pipe 8 and the second quantitative conveyor 9, and the flowing process of the carbonized slurry is similar to the flowing process of the calcium hydroxide slurry in the first bin 1, is lifted by the corresponding volumetric pump 18, repeatedly passes through the inclined plate 19 in the second bin 2, and is discharged from the third quantitative conveyor 11. Because the air pressure of the second bin 2 is low, the residual carbon dioxide in the carbonized slurry is vaporized and separated out, and the residual carbon dioxide content of the carbonized slurry is low.
Most of the calcium hydroxide slurry is carbonized into calcium carbonate in the first storage bin 1, but the high pressure of the carbon dioxide concentration in the first storage bin 1 increases the acidity of the slurry, and the calcium carbonate is easily reacted with acid and alkali to be changed into calcium hydroxide again, so that a small amount of calcium hydroxide remains in the carbonized slurry discharged from the first storage bin 1. In the second storage bin 2, due to the low pressure, along with the flow of the carbonized slurry, carbonic acid in the carbonized slurry is decomposed, so that the second storage bin 2 is filled with low-concentration carbon dioxide, ph of the carbonized slurry rises, and residual calcium hydroxide continues to be carbonized into calcium carbonate.
Claims (8)
1. The production process of high-dispersion superfine active calcium carbonate includes the following steps,
A. Calcining limestone into quicklime;
b. Slaking quicklime with water to generate calcium hydroxide slurry, and removing impurities from the calcium hydroxide slurry;
c. adding a dispersing agent of calcium ions into the calcium hydroxide slurry after impurity removal, and then introducing carbon dioxide to obtain carbonized slurry with the main component of calcium carbonate;
d. Adding an activating agent into the carbonized slurry;
e. Filtering, washing, drying and sieving the activated carbonized slurry to obtain a finished product;
The method is characterized in that: in the step c, introducing pressurized carbon dioxide into the calcium hydroxide slurry after impurity removal in a closed environment, reacting for a period of time, and then entering a negative pressure environment to stay for a period of time to obtain carbonized slurry;
The production device for realizing the production process comprises a carbonization device used in the step c, wherein the carbonization device comprises a first bin (1) and a second bin (2), the first bin (1) is connected with a compressed carbon dioxide gas source (4) through an air inlet joint (3), a carbonization channel is arranged in the first bin (1), the top of the first bin (1) is connected with a feed hopper (6) through a feed pipe (5), a first quantitative conveyor (7) is arranged on the feed pipe (5), and the lower end of the feed pipe (5) is connected with the feed end of the carbonization channel;
A decarburization channel is arranged in the second storage bin (2), a switching pipe (8) connected with the discharge end of the carbonization channel is arranged at the top of the second storage bin (2), a second quantitative conveyor (9) is arranged on the switching pipe (8), a discharge pipe (10) is arranged at the discharge end of the decarburization channel, a third quantitative conveyor (11) is arranged on the discharge pipe (10), and the second storage bin (2) is connected with a vacuum device (13) through an exhaust joint (12);
The first quantitative conveyor (7), the second quantitative conveyor (9) and the third quantitative conveyor (11) comprise spherical shells (20), motors (21) are arranged on one sides of the shells (20), horizontal driving shafts (22) are arranged in the shells (20), one ends of the driving shafts (22) are connected with the motors (21), and a plurality of semicircular rotating plates (23) are arranged on the periphery of the driving shafts (22).
2. The process for producing high-dispersion ultrafine activated calcium carbonate according to claim 1, wherein: in the step c, the pressure of the closed environment is 1.5-2 atmospheres.
3. The process for producing high-dispersion ultrafine activated calcium carbonate according to claim 1, wherein: in the step c, the pressure of the negative pressure environment is 0.2-0.3 atmosphere.
4. The process for producing high-dispersion ultrafine activated calcium carbonate according to claim 1, wherein: the bottom of the first bin (1) is inwards sunken to form a two-stage step structure, the second bin (2) is located at the lower-side step, and the second quantitative conveyor (9) is located at the upper-stage step.
5. The process for producing high-dispersion ultrafine activated calcium carbonate according to claim 1, wherein: all be equipped with a plurality of vertical baffle (14) in first feed bin (1) and second feed bin (2), the both sides of baffle (14) all form bin (15), and the top intercommunication of adjacent bin (15) is equipped with bin outlet (16), and the top of baffle (14) is equipped with feed inlet (17), and feed inlet (17) are connected corresponding bin outlet (16) through volumetric pump (18).
6. The process for producing high-dispersion superfine activated calcium carbonate according to claim 5, wherein the process comprises the steps of: a plurality of inclined plates (19) are arranged in the bin (15) from top to bottom, the inclination directions of the adjacent inclined plates (19) are opposite, and the adjacent inclined plates (19) are respectively fixed on two side walls of the bin (15).
7. The process for producing high-dispersion superfine activated calcium carbonate according to claim 5, wherein the process comprises the steps of: the horizontal spraying pipes (24) are arranged at the feeding holes (17), the spraying pipes (24) are parallel to the partition plates (14), and one row of exhaust holes (25) with a plurality of exhaust holes are arranged at two sides of the bottom of the spraying pipes (24).
8. The process for producing high-dispersion ultrafine activated calcium carbonate according to claim 7, wherein: the utility model discloses a shower, including shower, baffle, first baffle, second baffle, overflow launder, third baffle, overflow launder, bottom is equipped with first baffle (30) and second baffle (29) respectively, the below of shower (24) is equipped with leveling device (26) fixed with corresponding baffle (14), leveling device (26) are including open-top box body (27), the middle part of box body (27) is equipped with first baffle (28), both sides of first baffle (28) all are equipped with second baffle (29), the top of second baffle (29) is equipped with third baffle (30), form overflow launder (31) between second baffle (29) and second baffle (29), the height of overflow launder (31) is less than the top height of first baffle (28), the lower extreme of third baffle (30) is inwards bent, the bottom both sides of box body (27) all are equipped with a plurality of overflow hole (32) that the straight line was arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553859.0A CN117623358B (en) | 2023-11-21 | 2023-11-21 | Process and device for producing high-dispersion superfine active calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553859.0A CN117623358B (en) | 2023-11-21 | 2023-11-21 | Process and device for producing high-dispersion superfine active calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117623358A CN117623358A (en) | 2024-03-01 |
| CN117623358B true CN117623358B (en) | 2024-07-09 |
Family
ID=90017214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311553859.0A Active CN117623358B (en) | 2023-11-21 | 2023-11-21 | Process and device for producing high-dispersion superfine active calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117623358B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3110896A1 (en) * | 1981-03-20 | 1982-09-30 | Foster Wheeler Energy Corp., Livingston, N.J. | Method for comminuting and activating limestone by reaction with carbon dioxide |
| CN106976898A (en) * | 2017-05-24 | 2017-07-25 | 福建鸿丰纳米科技有限公司 | A kind of method that continuous carbonization produces size tunable calcium carbonate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100854913B1 (en) * | 2007-10-01 | 2008-08-28 | (주) 세화엠텍 | Producing method for calcium carbonate and its producing system |
| CN202440323U (en) * | 2012-03-02 | 2012-09-19 | 连州市凯恩斯纳米材料有限公司 | Carbonizer for producing nano calcium carbonate |
| CN102923749B (en) * | 2012-11-08 | 2014-11-26 | 广西华纳新材料科技有限公司 | Carbonization method for preparing nano calcium carbonate |
| CN111533150B (en) * | 2020-04-14 | 2022-08-26 | 安徽东方钙业有限公司 | Production process of superfine nano calcium carbonate |
-
2023
- 2023-11-21 CN CN202311553859.0A patent/CN117623358B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3110896A1 (en) * | 1981-03-20 | 1982-09-30 | Foster Wheeler Energy Corp., Livingston, N.J. | Method for comminuting and activating limestone by reaction with carbon dioxide |
| CN106976898A (en) * | 2017-05-24 | 2017-07-25 | 福建鸿丰纳米科技有限公司 | A kind of method that continuous carbonization produces size tunable calcium carbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117623358A (en) | 2024-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117242971B (en) | Water-saving irrigation fertilization equipment based on quantitative control | |
| CN117623358B (en) | Process and device for producing high-dispersion superfine active calcium carbonate | |
| CN217431696U (en) | Pharmaceutical chemical industry reation kettle convenient to wash | |
| CN210262019U (en) | Water electrolysis hydrogen production purification device | |
| CN221440357U (en) | Production device for high-dispersion superfine active calcium carbonate | |
| CN208115606U (en) | A kind of coating material agitator with multiple agitating function | |
| CN207694575U (en) | A kind of tail gas absorbing system containing hydrogen fluoride | |
| CN1027750C (en) | Process and apparatus for preparing sodium bicarbonate | |
| CN103058248A (en) | Equipment and process for preparing nano calcium carbonate by gypsum | |
| CN208097674U (en) | A kind of series connection type waste gas purification device | |
| CN207126426U (en) | A kind of chemical fertilizer mixing arrangement for being easy to cleaning | |
| CN108658139B (en) | Dosing device for sewage treatment | |
| CN108893154A (en) | A kind of raw material of new energy fuel is milled filter device | |
| CN212573468U (en) | Agricultural seed mixes medicine device | |
| CN117101367A (en) | Waste gas treatment device of water reducing agent production facility | |
| CN113956084A (en) | Organic fertilizer fermentation equipment | |
| CN209643826U (en) | A kind of expanded pellet diet airless spray unit | |
| CN203128220U (en) | Equipment for producing nano calcium carbonate from gypsum | |
| CN203678194U (en) | Carbon dioxide gas purification tower for aluminum hydroxide production | |
| CN214991462U (en) | A fermentation system for production of fresh peach vinegar | |
| CN206240870U (en) | A kind of batch (-type) honey centrifuge cleans vibrator | |
| CN206808139U (en) | A kind of cultivating edible mushroom room air cleaning unit | |
| CN218530455U (en) | Desulphurization unit for cement production | |
| CN206262555U (en) | A kind of reactor assembly for biomass production of chemicals | |
| CN215559663U (en) | Environment-friendly waste liquid treatment device for chemical additive processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |