CN113562756A - Production process of calcium hydroxide - Google Patents
Production process of calcium hydroxide Download PDFInfo
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- CN113562756A CN113562756A CN202110894663.2A CN202110894663A CN113562756A CN 113562756 A CN113562756 A CN 113562756A CN 202110894663 A CN202110894663 A CN 202110894663A CN 113562756 A CN113562756 A CN 113562756A
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- Prior art keywords
- calcium hydroxide
- curing
- namely
- calcium
- mass ratio
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 64
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 64
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000001723 curing Methods 0.000 claims abstract description 24
- 239000002893 slag Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 235000019738 Limestone Nutrition 0.000 claims abstract description 11
- 239000006028 limestone Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 27
- 239000000292 calcium oxide Substances 0.000 claims description 24
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003830 anthracite Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 238000004945 emulsification Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 239000010883 coal ash Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000001804 emulsifying effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 44
- 235000012255 calcium oxide Nutrition 0.000 description 18
- 230000008901 benefit Effects 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- C01F11/02—Oxides or hydroxides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a production process of calcium hydroxide, belonging to the technical field of calcium hydroxide production. The invention adopts limestone and carbide slag as production raw materials, and obtains a standardized milky calcium hydroxide product by sequentially processing the raw materials through twelve steps of calcining, screening, mechanical separation, crushing, stirring, curing, secondary crushing, secondary curing, drying, grinding, emulsifying, packaging and warehousing; the invention solves the problem of low profit rate of the existing traditional production process of calcium hydroxide, improves the profit rate of chemical enterprises, and provides help for the long-term development of the chemical enterprises.
Description
Technical Field
The invention relates to the technical field of calcium hydroxide production, in particular to a production process of calcium hydroxide.
Background
Calcium hydroxide is an inorganic compound of the formula Ca (OH)2, commonly known as slaked or slaked lime; calcium hydroxide has wide application in industry. Calcium hydroxide is obtained by reacting calcium oxide with water, at present, most factories generally adopt quicklime to produce calcium hydroxide, and the main production process is generally a dry method and a wet method.
At present, a plurality of manufacturers for producing calcium hydroxide have fierce market competition, the profit of producing calcium hydroxide by using quick lime is small, and the increase demand of enterprise operation cannot be met by insisting on producing calcium hydroxide by using quick lime; with the continuous trend of strict environmental protection policy, many enterprises producing waste materials can not carry out any treatment on the production waste materials, and the waste materials are utilized to reproduce the profit space, so that the waste residues of the carbide slag can be produced in the acetylene production, the main component of the carbide slag is calcium hydroxide, and the production of the calcium hydroxide by the carbide slag has obvious cost advantage; in addition, in recent years, the attention of various local governments on sewage treatment is continuously improved, calcium hydroxide has a large market space as a common sewage treatment agent, and the milky calcium hydroxide obtained by deep processing of calcium hydroxide is widely used due to good sewage treatment effect and no secondary pollution; in conclusion, the production of milky calcium hydroxide by using carbide slag is a great transformation opportunity for chemical enterprises, so it is necessary to develop a process for producing milky calcium hydroxide by using carbide slag.
Disclosure of Invention
Aiming at the problems of defects and deficiencies in the prior art, the invention provides a production process of calcium hydroxide, which solves the problem of low profit rate of the existing traditional production process of calcium hydroxide, improves the profit rate of chemical enterprises, and provides help for long-term development of the chemical enterprises.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a production process of calcium hydroxide comprises the following specific steps:
the method comprises the following steps: calcining, namely, mixing limestone with calcium carbonate content not less than 95% and anthracite raw materials according to the mass ratio of 1: 0.058-1: 0.12, uniformly mixing and calcining to obtain a product calcium oxide;
step two: screening, namely removing impurities in coal ash in the product calcium oxide by screening;
step three: selecting by a machine, namely removing residual calcium carbonate impurities from the screened calcium oxide by an infrared machine;
step four: crushing, namely putting the obtained calcium oxide into a crusher to perform crushing operation to obtain powdery calcium oxide;
step five: stirring, namely selecting carbide slag with the water content of 15-35 wt% and powdery calcium oxide to stir in a stirrer according to the mass ratio of 1: 0.5-1: 1, wherein the stirring time is 15-60 min;
step six: curing, namely putting the stirred mixed material into a curing tank for preliminary curing reaction, wherein the reaction temperature is set to be 40-75 ℃, and the reaction time is set to be 20-90 min;
step seven: carrying out secondary crushing, namely carrying out secondary crushing on the cured material in a crusher;
step eight: secondary curing, namely putting the secondarily crushed material into a curing tank again for secondary curing, wherein the curing temperature is set to be 25-50 ℃, and the curing time is set to be 1-6 h, so as to obtain calcium hydroxide coarse material;
step nine: drying, namely drying the calcium hydroxide coarse material by a dryer;
step ten: grinding, namely adding the dried calcium hydroxide coarse material into a grinder for grinding operation to obtain powdery calcium hydroxide;
step eleven: adding water and powdery calcium hydroxide into an emulsification tank according to the mass ratio of 1: 1.5-1: 2.0, stirring at a constant speed for 1-3 h in the emulsification tank by using a stirrer, and standing for 12-24 h after stirring to obtain milky calcium hydroxide;
step twelve: packing and warehousing, and packing and warehousing the milky calcium hydroxide.
Furthermore, the mass ratio of the limestone to the anthracite is 1: 0.058.
Further, the stirrer is a double-shaft stirrer, and the stirring time in the fifth step is 15 min.
Further, the grinder is a double-disc grinder.
Further, the water content of the carbide slag is 25 wt%.
Further, the step shows that the mass ratio of water to powdery calcium hydroxide is 1: 1.5.
Further, the temperature of the aging tank for preliminary aging in the sixth step was set to 45 ℃.
The invention has the following beneficial effects: the invention produces the product emulsified calcium hydroxide with better development prospect by using the industrial waste residue carbide slag and the limestone as raw materials, on one hand, the price of the limestone and the carbide slag is lower than that of the calcium oxide raw materials, thereby reducing the production cost of the raw materials, and on the other hand, the market space of the emulsified calcium hydroxide is large, thereby having development prospect, thereby improving the competitive advantage of the calcium hydroxide, generally improving the profit rate of the product, and providing guarantee for enterprises to obtain advantages in market competition and for benign operation.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in figure 1, a production process of calcium hydroxide comprises the first step of preparing limestone with 95% calcium carbonate and anthracite, mixing them according to the mass ratio of 1:0.058, uniformly mixing the limestone and anthracite, and calcining to obtain calcium oxide; secondly, screening the calcium oxide by a vibrating screen to remove impurities in the coal ash; thirdly, the screened calcium oxide is subjected to infrared ray machine selection, so that residual calcium carbonate impurities can be removed; fourthly, putting the obtained calcium oxide into a crusher for crushing operation to obtain powdery calcium oxide; fifthly, selecting the carbide slag with the water content of 25wt% and powdered calcium oxide to mix according to the mass ratio of 1:1, adding the mixed materials into a stirrer to be uniformly stirred for 15 min; sixthly, putting the uniformly mixed material into a curing tank for preliminary curing reaction, wherein the reaction temperature is set to 45 ℃, and the reaction time is set to 1 h; seventhly, naturally spreading the primarily cured mixed material for cooling, and secondarily crushing the cooled mixed material by a crusher; eighthly, putting the re-crushed mixed material into a curing tank again for secondary curing, wherein the curing temperature is set to 35 ℃, the curing time is set to 3 hours, and the calcium hydroxide coarse material is obtained after the reaction is finished; ninth, drying the calcium hydroxide coarse material by a dryer; tenth, adding the dried calcium hydroxide coarse material into a grinder for grinding operation to obtain powdery calcium hydroxide; step ten, adding water and powdery calcium hydroxide into an emulsification tank according to the mass ratio of 1:1.5, stirring at a constant speed for 2 hours in the emulsification tank by using a stirrer, and standing for 24 hours after stirring to obtain milky calcium hydroxide; and step ten, packaging the milky calcium hydroxide and putting the milky calcium hydroxide into a warehouse.
The invention has the following beneficial effects: the invention produces the product emulsified calcium hydroxide with better development prospect by using the industrial waste residue carbide slag and the limestone as raw materials, on one hand, the price of the limestone and the carbide slag is lower than that of the calcium oxide raw materials, thereby reducing the production cost of the raw materials, and on the other hand, the market space of the emulsified calcium hydroxide is large, thereby having development prospect, thereby improving the competitive advantage of the calcium hydroxide, generally improving the profit rate of the product, and providing guarantee for enterprises to obtain advantages in market competition and for benign operation.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The production process of calcium hydroxide is characterized by comprising the following specific steps:
the method comprises the following steps: calcining, namely, mixing limestone with calcium carbonate content not less than 95% and anthracite raw materials according to the mass ratio of 1: 0.058-1: 0.12, uniformly mixing and calcining to obtain a product calcium oxide;
step two: screening, namely removing impurities in coal ash in the product calcium oxide by screening;
step three: selecting by a machine, namely removing residual calcium carbonate impurities from the screened calcium oxide by an infrared machine;
step four: crushing, namely putting the obtained calcium oxide into a crusher to perform crushing operation to obtain powdery calcium oxide;
step five: stirring, namely selecting carbide slag with the water content of 15-35 wt% and powdery calcium oxide to stir in a stirrer according to the mass ratio of 1: 0.5-1: 1, wherein the stirring time is 15-60 min;
step six: curing, namely putting the stirred mixed material into a curing tank for preliminary curing reaction, wherein the reaction temperature is set to be 40-75 ℃, and the reaction time is set to be 20-90 min;
step seven: carrying out secondary crushing, namely carrying out secondary crushing on the cured material in a crusher;
step eight: secondary curing, namely putting the secondarily crushed material into a curing tank again for secondary curing, wherein the curing temperature is set to be 25-50 ℃, and the curing time is set to be 1-6 h, so as to obtain calcium hydroxide coarse material;
step nine: drying, namely drying the calcium hydroxide coarse material by a dryer;
step ten: grinding, namely adding the dried calcium hydroxide coarse material into a grinder for grinding operation to obtain powdery calcium hydroxide;
step eleven: adding water and powdery calcium hydroxide into an emulsification tank according to the mass ratio of 1: 1.5-1: 2.0, stirring at a constant speed for 1-3 h in the emulsification tank by using a stirrer, and standing for 12-24 h after stirring to obtain milky calcium hydroxide;
step twelve: packing and warehousing, and packing and warehousing the milky calcium hydroxide.
2. The process for producing calcium hydroxide according to claim 1, wherein: the mass ratio of the limestone to the anthracite is 1: 0.058.
3. The process for producing calcium hydroxide according to claim 1, wherein: the stirrer is a double-shaft stirrer, and the stirring time in the fifth step is 15 min.
4. The process for producing calcium hydroxide according to claim 1, wherein: the grinder is a double-disc grinder.
5. The process for producing calcium hydroxide according to claim 1, wherein: the water content of the carbide slag is 25 wt%.
6. The process for producing calcium hydroxide according to claim 1, wherein: the step shows that the mass ratio of the water to the powdery calcium hydroxide is 1: 1.5.
7. The process for producing calcium hydroxide according to claim 1, wherein: the temperature of the aging tank for preliminary aging in the sixth step was set to 45 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110894663.2A CN113562756A (en) | 2021-08-05 | 2021-08-05 | Production process of calcium hydroxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110894663.2A CN113562756A (en) | 2021-08-05 | 2021-08-05 | Production process of calcium hydroxide |
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| Publication Number | Publication Date |
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| CN113562756A true CN113562756A (en) | 2021-10-29 |
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| CN202110894663.2A Pending CN113562756A (en) | 2021-08-05 | 2021-08-05 | Production process of calcium hydroxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114342926A (en) * | 2022-01-18 | 2022-04-15 | 湖南皕成科技股份有限公司 | Environment-friendly type tree protection special calcium hydroxide and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503208A (en) * | 2009-03-13 | 2009-08-12 | 杭州稳健钙业有限公司 | Process for preparing high concentration milky calcium hydroxide |
| CN103880056A (en) * | 2014-02-26 | 2014-06-25 | 钟文庭 | Preparation method for preparing calcium hydroxide through carbide slag |
| CN110498620A (en) * | 2019-08-13 | 2019-11-26 | 浙江钙科机械设备有限公司 | A kind of calcium stearate calcium hydroxide production technology |
| CN112250098A (en) * | 2020-10-28 | 2021-01-22 | 衢州顺天钙业有限公司 | High-activity calcium oxide and preparation method thereof |
-
2021
- 2021-08-05 CN CN202110894663.2A patent/CN113562756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503208A (en) * | 2009-03-13 | 2009-08-12 | 杭州稳健钙业有限公司 | Process for preparing high concentration milky calcium hydroxide |
| CN103880056A (en) * | 2014-02-26 | 2014-06-25 | 钟文庭 | Preparation method for preparing calcium hydroxide through carbide slag |
| CN110498620A (en) * | 2019-08-13 | 2019-11-26 | 浙江钙科机械设备有限公司 | A kind of calcium stearate calcium hydroxide production technology |
| CN112250098A (en) * | 2020-10-28 | 2021-01-22 | 衢州顺天钙业有限公司 | High-activity calcium oxide and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114342926A (en) * | 2022-01-18 | 2022-04-15 | 湖南皕成科技股份有限公司 | Environment-friendly type tree protection special calcium hydroxide and production method thereof |
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Application publication date: 20211029 |
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