CN114644355A - Preparation method and preparation device of high-dispersity high-specific-surface-area calcium hydroxide - Google Patents
Preparation method and preparation device of high-dispersity high-specific-surface-area calcium hydroxide Download PDFInfo
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- CN114644355A CN114644355A CN202011502946.XA CN202011502946A CN114644355A CN 114644355 A CN114644355 A CN 114644355A CN 202011502946 A CN202011502946 A CN 202011502946A CN 114644355 A CN114644355 A CN 114644355A
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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
- C01F11/02—Oxides or hydroxides
- C01F11/04—Oxides or hydroxides by thermal decomposition
- C01F11/06—Oxides or hydroxides by thermal decomposition of carbonates
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- 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
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- 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
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
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- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
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- Structural Engineering (AREA)
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- 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 preparation method and a preparation device of calcium hydroxide with high dispersibility and high specific surface area, wherein the preparation method comprises the following steps: s1, calcining, namely, putting the limestone raw material into a lime kiln for calcining, taking out after the calcining is finished, and sorting out the calcined finished product calcium oxide; s2, digesting, and mixing a proper amount of water with the calcium oxide obtained in the S1 to obtain a mixed solution; s3, stirring, namely stirring the mixed solution by using a stirrer to obtain calcium hydroxide feed liquid; s4, purifying and separating; the calcium hydroxide solid with larger particles is blocked on the filter screen through the filter screen, the fan blade is driven by the motor to generate negative pressure, the calcium hydroxide solid with larger particles is absorbed, and the calcium hydroxide solid is automatically put into the grinding box again for grinding, so that the grinding degree of the calcium hydroxide is deepened, and the dispersibility and the specific surface area of the calcium hydroxide are improved.
Description
Technical Field
The invention relates to the technical field of calcium hydroxide preparation, in particular to a preparation method and a preparation device of calcium hydroxide with high dispersibility and high specific surface area.
Background
Calcium hydroxide is an inorganic compound commonly known as slaked or slaked lime. Is a white powdery solid, and is divided into an upper layer and a lower layer after water is added, wherein the upper layer aqueous solution is called as clear lime water, and the lower layer suspension is called as lime milk or lime slurry. The supernatant clear lime water can be used for detecting carbon dioxide, and the lower turbid liquid lime milk is a building material. Calcium hydroxide is a strong base, has bactericidal and antiseptic properties, and has corrosive effects on skin and fabrics. Calcium hydroxide has wide application in industry. It is a common building material and also used as a bactericide, a chemical raw material and the like.
The general calcium hydroxide has the characteristics of low dispersibility and low specific surface area due to low grinding degree in the production process, and the using effect of the calcium hydroxide is influenced. Therefore, a preparation method and a preparation device of calcium hydroxide with high dispersibility and high specific surface area are provided.
Disclosure of Invention
The invention aims to provide a preparation method of calcium hydroxide with high dispersibility and high specific surface area and a preparation device thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of high-dispersity and high-specific-surface-area calcium hydroxide comprises the following steps:
s1, calcining, namely, putting the limestone raw material into a lime kiln for calcining, taking out after the calcining is finished, and sorting out the calcined finished product calcium oxide;
s2, digesting, and mixing a proper amount of water with the calcium oxide obtained in the S1 to obtain a mixed solution;
s3, stirring, namely stirring the mixed solution by using a stirrer to obtain calcium hydroxide feed liquid;
s4, purifying and separating, namely discharging the calcium hydroxide feed liquid into a cyclone through a slurry pump, and separating calcium hydroxide solids in the calcium hydroxide feed liquid;
s5, drying, namely putting the calcium hydroxide solid into a drying oven for drying;
and S6, grinding, namely putting the dried calcium hydroxide solid into a grinding device for grinding to obtain calcium hydroxide powder.
Preferably, in the S1, the lime kiln comprises a preheating zone, a calcining zone and a cooling zone.
Preferably, the preheating zone is located at the upper part of the lime kiln, the calcining zone is located at the middle part of the lime kiln, and the cooling zone is located at the bottom of the lime kiln.
Preferably, the temperature of the preheating zone is 700-850 ℃, and the temperature of the calcining zone is 850-1200 ℃. The calcination time is 5-12 hours.
Preferably, the ratio of calcium oxide to water in S2 is 1: 3-1: 3.5, and the stirring time in S3 is 1-2 hours.
Preferably, in S4, the discharge pressure of the mud pump is 2 to 3 kilograms per square centimeter.
Preferably, in the S5, the drying temperature is 140-310 ℃, and the drying time is 2-5 hours.
The invention also provides a preparation device of the high-dispersity high-specific-surface-area calcium hydroxide, which comprises a grinding box, wherein the top of the grinding box is communicated with a feeding pipe, the top of the feeding pipe is hinged with a cover plate, a grinding groove is formed in the grinding box, a material groove is formed in the grinding box, the outer side wall of the feeding pipe is communicated with a connecting pipe, one end of the connecting pipe is communicated with a bent pipe, the inner side wall of the bent pipe is fixedly connected with a second support, one end of the second support is welded with a second motor, the output shaft of the second motor is fixedly connected with a fan blade, one end of the bent pipe is communicated with an expanding pipe, one end of the expanding pipe, far away from the bent pipe, is communicated with a material suction pipe, and one end of the material suction pipe, far away from the expanding pipe, penetrates through the grinding box and extends to the interior of the material groove.
Through adopting above-mentioned technical scheme, drop into the pan feeding pipe with the calcium hydroxide solid, and closed apron, driving motor drives the crushing roller and rotates, carry out preliminary breakage to the calcium hydroxide solid, the calcium hydroxide solid after the breakage drops on grinding roll, first motor drives the action wheel and rotates, the transmission is followed the driving wheel, it rotates to drive grinding roll, carry out abrasive treatment to the calcium hydroxide solid, the powder after the grinding falls on the filter screen, tiny qualified powder passes through the ejection of compact of discharging pipe behind the filter screen, the great calcium hydroxide solid of granule is by the filter screen separation, the second motor drives the flabellum and rotates, absorb the great calcium hydroxide solid of granule, grind again, thereby deepen the porphyrizing degree of calcium hydroxide, improve the dispersibility and the specific surface area of calcium hydroxide.
Preferably, the inner side wall of the grinding box is rotatably connected with two symmetrical grinding rollers, the outer side wall of each grinding roller is fixedly connected with a grinding tooth, the inner side wall of the grinding box is fixedly connected with a first support, one end, far away from the grinding box, of the first support is provided with a bearing, an inner ring of the bearing is welded with a rotating rod, the top end of the rotating rod is fixedly connected with a grinding roller, the outer side wall of the grinding roller is fixedly connected with a grinding convex ring, the bottom end of the rotating rod is fixedly connected with a driven wheel, the inner side wall of the grinding box is provided with a belt shell, the driven wheel is located inside the belt shell, a cavity is formed in the grinding box, a first motor is arranged inside the cavity, an output shaft of the first motor is welded with a driving wheel, and the driving wheel is in transmission connection with the driven wheel through a belt.
Through adopting above-mentioned technical scheme, first motor drives the action wheel and rotates, and the transmission is followed the driving wheel, drives the grinding roller and rotates, carries out grinding treatment to the calcium hydrate solid.
Preferably, a filter screen is installed inside the material tank, and a discharge pipe is communicated with the bottom of the grinding box.
Through adopting above-mentioned technical scheme, the powder after the grinding falls on the filter screen, and tiny qualified powder passes through the filter screen after the discharging pipe ejection of compact, and the great calcium hydroxide solid of granule is by the filter screen separation, and the second motor drives the flabellum and rotates, absorbs the great calcium hydroxide solid of granule, grinds again.
Compared with the prior art, the invention has the beneficial effects that:
the calcium hydroxide solid with larger particles is blocked on the filter screen through the filter screen, the fan blade is driven by the motor to generate negative pressure, the calcium hydroxide solid with larger particles is absorbed, and the calcium hydroxide solid is automatically put into the grinding box again for grinding, so that the grinding degree of the calcium hydroxide is deepened, and the dispersibility and the specific surface area of the calcium hydroxide are improved.
Drawings
FIG. 1 is a schematic structural diagram of a preparation apparatus for calcium hydroxide with high dispersibility and high specific surface area according to the present invention;
FIG. 2 is a schematic view of a belt case of the present invention;
FIG. 3 is an enlarged view of the area A in FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of the area B in FIG. 1 according to the present invention;
FIG. 5 is an enlarged view of the region C of FIG. 1 according to the present invention;
FIG. 6 is a flow chart of a method for preparing calcium hydroxide with high dispersibility and high specific surface area according to the invention.
In the figure: 1. grinding the materials in a grinding box; 2. a feeding pipe; 3. a cover plate; 4. crushing teeth; 5. a crushing roller; 6. a grinding groove; 7. a first bracket; 8. a bearing; 9. a rotating rod; 10. a grinding roller; 11. grinding the convex ring; 12. a driven wheel; 13. a belt housing; 14. a cavity; 15. a first motor; 16. a driving wheel; 17. a trough; 18. a filter screen; 19. a discharge pipe; 20. a material suction pipe; 21. a divergent pipe; 22. bending the pipe; 23. connecting pipes; 24. a second bracket; 25. a second motor; 26. a fan blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a preparation method of high-dispersity and high-specific-surface-area calcium hydroxide comprises the following steps:
s1, calcining, namely, putting the limestone raw material into a lime kiln for calcining, taking out after the calcining is finished, and sorting out the calcined finished product calcium oxide;
s2, digesting, and mixing a proper amount of water with the calcium oxide obtained in the S1 to obtain a mixed solution;
s3, stirring, namely stirring the mixed solution by using a stirrer to obtain calcium hydroxide feed liquid;
s4, purifying and separating, namely discharging the calcium hydroxide feed liquid into a cyclone through a slurry pump, and separating calcium hydroxide solids in the calcium hydroxide feed liquid;
s5, drying, namely putting the calcium hydroxide solid into a drying oven for drying;
and S6, grinding, namely putting the dried calcium hydroxide solid into a grinding device for grinding to obtain calcium hydroxide powder.
Specifically, in S1, the lime kiln includes a preheating zone, a calcining zone, and a cooling zone.
Specifically, the preheating zone is located at the upper part of the lime kiln, the calcining zone is located at the middle part of the lime kiln, and the cooling zone is located at the bottom of the lime kiln.
Specifically, the temperature of the preheating zone is 700-850 ℃, and the temperature of the calcining zone is 850-1200 ℃. The calcination time is 5-12 hours.
Specifically, the ratio of calcium oxide to water in S2 is 1: 3-1: 3.5, and the stirring time in S3 is 1-2 hours.
Specifically, in S4, the discharge pressure of the mud pump is 2-3 kilograms per square centimeter.
Specifically, in S5, the drying temperature is 140-310 ℃, and the drying time is 2-5 hours.
The invention also provides a preparation device of the high-dispersity high-specific-surface-area calcium hydroxide, which comprises a grinding box 1, wherein the top of the grinding box 1 is communicated with a feeding pipe 2, the top of the feeding pipe 2 is hinged with a cover plate 3, a grinding groove 6 is formed in the grinding box 1, a material groove 17 is formed in the grinding box 1, the outer side wall of the feeding pipe 2 is communicated with a connecting pipe 23, one end of the connecting pipe 23 is communicated with a bent pipe 22, the inner side wall of the bent pipe 22 is fixedly connected with a second support 24, one end of the second support 24 is welded with a second motor 25, an output shaft of the second motor 25 is fixedly connected with a fan blade 26, one end of the bent pipe 22 is communicated with an expanding pipe 21, one end of the expanding pipe 21, which is far away from the bent pipe 22, is communicated with a suction pipe 20, and one end of the suction pipe 20, which is far away from the expanding pipe 21, penetrates through the grinding box 1 and extends into the material groove 17. Grinding box 1's inside wall rotates and is connected with the crushing roller 5 that quantity is two symmetries, the broken tooth 4 of lateral wall fixedly connected with of crushing roller 5, the first support 7 of the inside wall fixedly connected with of grinding box 1, first support 7 keeps away from the one end of grinding box 1 and installs bearing 8, the inner circle welding of bearing 8 has bull stick 9, the top fixedly connected with grinding roller 10 of bull stick 9, the lateral wall fixedly connected with of grinding roller 10 grinds protruding circle 11, the bottom fixedly connected with of bull stick 9 follows driving wheel 12, belt shell 13 is installed to grinding box 1's inside wall, follow the inside that driving wheel 12 is located belt shell 13, cavity 14 has been seted up to grinding box 1's inside, the internally mounted of cavity 14 has first motor 15, the output shaft welding of first motor 15 has action wheel 16, action wheel 16 passes through the belt and is connected with the transmission from driving wheel 12. The first motor 15 drives the driving wheel 16 to rotate, drives the driven wheel 12, drives the grinding roller 10 to rotate, and grinds the calcium hydroxide solid. A filter screen 18 is arranged in the feed tank 17, and a discharge pipe 19 is communicated with the bottom of the grinding box 1.
Through adopting above-mentioned technical scheme, the powder after the grinding falls on filter screen 18, and tiny qualified powder passes through filter screen 18 after the ejection of compact of discharging pipe 19, and the great calcium hydroxide solid of granule is by the separation of filter screen 18, and second motor 25 drives flabellum 26 and rotates, absorbs the great calcium hydroxide solid of granule, grinds again.
The structure principle is as follows: drop into pan feeding pipe 2 with the calcium hydroxide solid, and closed apron 3, driving motor drives crushing roller 5 and rotates, carry out preliminary breakage to the calcium hydroxide solid, the calcium hydroxide solid after the breakage drops on grinding roller 10, first motor 15 drives action wheel 16 and rotates, the transmission is from driving wheel 12, it rotates to drive grinding roller 10, carry out abrasive treatment to the calcium hydroxide solid, the powder after the grinding falls on filter screen 18, tiny qualified powder passes through the ejection of compact of discharging pipe 19 behind the filter screen 18, the great calcium hydroxide solid of granule is by the separation of filter screen 18, second motor 25 drives flabellum 26 and rotates, absorb the great calcium hydroxide solid of granule, grind again, thereby deepen the porphyrization degree of calcium hydroxide, improve the dispersibility and the specific surface area of calcium hydroxide.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A preparation method of calcium hydroxide with high dispersibility and high specific surface area is characterized by comprising the following steps:
s1, calcining, namely, putting the limestone raw material into a lime kiln for calcining, taking out after the calcining is finished, and sorting out the calcined finished product calcium oxide;
s2, digesting, and mixing a proper amount of water with the calcium oxide obtained in the S1 to obtain a mixed solution;
s3, stirring, namely stirring the mixed solution by using a stirrer to obtain calcium hydroxide feed liquid;
s4, purifying and separating, namely discharging the calcium hydroxide feed liquid into a cyclone through a slurry pump, and separating calcium hydroxide solids in the calcium hydroxide feed liquid;
s5, drying, namely putting the calcium hydroxide solid into a drying oven for drying;
and S6, grinding, namely putting the dried calcium hydroxide solid into a grinding device for grinding to obtain calcium hydroxide powder.
2. The preparation method of calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 1, wherein: in the S1, the lime kiln includes a preheating zone, a calcining zone, and a cooling zone.
3. The method for preparing the calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 2, wherein: the preheating zone is positioned at the upper part of the lime kiln, the calcining zone is positioned at the middle part of the lime kiln, and the cooling zone is positioned at the bottom of the lime kiln.
4. The method for preparing the calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 2, wherein: the temperature of the preheating zone is 700-850 ℃, and the temperature of the calcining zone is 850-1200 ℃. The calcination time is 5-12 hours.
5. The method for preparing the calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 1, wherein: in the S2, the ratio of calcium oxide to water is 1: 3-1: 3.5, and in the S3, the stirring time is 1-2 hours.
6. The preparation method of calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 1, wherein: in S4, the mud pump has a discharge pressure of 2 to 3 kilograms per square centimeter.
7. The preparation method of calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 1, wherein: in the S5, the drying temperature is 140 ℃ to 310 ℃, and the drying time is 2-5 hours.
8. A preparation device of calcium hydroxide with high dispersibility and high specific surface area is characterized in that: the grinding box comprises a grinding box (1), wherein the top of the grinding box (1) is communicated with a feeding pipe (2), the top of the feeding pipe (2) is hinged to a cover plate (3), a grinding groove (6) is formed in the grinding box (1), a material groove (17) is formed in the grinding box (1), the outer side wall of the feeding pipe (2) is communicated with a connecting pipe (23), one end of the connecting pipe (23) is communicated with a bent pipe (22), the inner side wall of the bent pipe (22) is fixedly connected with a second support (24), one end of the second support (24) is welded with a second motor (25), the output shaft of the second motor (25) is fixedly connected with a fan blade (26), one end of the bent pipe (22) is communicated with an expanding pipe (21), one end, far away from the bent pipe (22), of the expanding pipe (21) is provided with a material sucking pipe (20), and one end, far away from the expanding pipe (21), of the material sucking pipe (20) is communicated with the grinding box (1) and extends to the inside of the material groove (17).
9. The apparatus for preparing calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 8, wherein: the grinding device is characterized in that the inner side wall of the grinding box (1) is rotatably connected with two symmetrical grinding rollers (5), the outer side wall of each grinding roller (5) is fixedly connected with a grinding tooth (4), the inner side wall of the grinding box (1) is fixedly connected with a first support (7), one end, far away from the grinding box (1), of each first support (7) is provided with a bearing (8), the inner ring of each bearing (8) is welded with a rotating rod (9), the top end of each rotating rod (9) is fixedly connected with a grinding roller (10), the outer side wall of each grinding roller (10) is fixedly connected with a grinding convex ring (11), the bottom end of each rotating rod (9) is fixedly connected with a driven wheel (12), the inner side wall of the grinding box (1) is provided with a belt shell (13), the driven wheel (12) is positioned inside the belt shell (13), and the grinding box (1) is internally provided with a cavity (14), the utility model discloses a motor, including cavity (14), first motor (15) are installed to the internally mounted of cavity (14), the output shaft welding of first motor (15) has action wheel (16), action wheel (16) are connected with driven round of (12) transmission through the belt.
10. The apparatus for preparing calcium hydroxide with high dispersibility and high specific surface area as claimed in claim 8, wherein: a filter screen (18) is arranged in the feed trough (17), and a discharge pipe (19) is communicated with the bottom of the grinding box (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011502946.XA CN114644355A (en) | 2020-12-18 | 2020-12-18 | Preparation method and preparation device of high-dispersity high-specific-surface-area calcium hydroxide |
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| CN202011502946.XA CN114644355A (en) | 2020-12-18 | 2020-12-18 | Preparation method and preparation device of high-dispersity high-specific-surface-area calcium hydroxide |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195520A (en) * | 2007-12-19 | 2008-06-11 | 黄官禹 | Vertical continuous calcination lime burner |
| CN104603080A (en) * | 2012-09-12 | 2015-05-06 | 勒瓦研究开发股份有限公司 | High-finesse limewater composition |
| CN107720797A (en) * | 2017-11-01 | 2018-02-23 | 神雾环保技术股份有限公司 | The system and method for handling carbide slag |
| CN109809715A (en) * | 2019-03-15 | 2019-05-28 | 南京格暠环保科技有限公司 | The preparation method of high porosity calcium hydroxide |
| CN210496548U (en) * | 2019-07-26 | 2020-05-12 | 王纪彩 | Chinese herbal medicine processing rubbing crusher |
-
2020
- 2020-12-18 CN CN202011502946.XA patent/CN114644355A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195520A (en) * | 2007-12-19 | 2008-06-11 | 黄官禹 | Vertical continuous calcination lime burner |
| CN104603080A (en) * | 2012-09-12 | 2015-05-06 | 勒瓦研究开发股份有限公司 | High-finesse limewater composition |
| US20150183652A1 (en) * | 2012-09-12 | 2015-07-02 | S. A. Lhoist Recherche et. Developpement | High-finesse limewater composition |
| CN107720797A (en) * | 2017-11-01 | 2018-02-23 | 神雾环保技术股份有限公司 | The system and method for handling carbide slag |
| CN109809715A (en) * | 2019-03-15 | 2019-05-28 | 南京格暠环保科技有限公司 | The preparation method of high porosity calcium hydroxide |
| CN210496548U (en) * | 2019-07-26 | 2020-05-12 | 王纪彩 | Chinese herbal medicine processing rubbing crusher |
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