CN110498620A - A kind of calcium stearate calcium hydroxide production technology - Google Patents
A kind of calcium stearate calcium hydroxide production technology Download PDFInfo
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- CN110498620A CN110498620A CN201910746435.3A CN201910746435A CN110498620A CN 110498620 A CN110498620 A CN 110498620A CN 201910746435 A CN201910746435 A CN 201910746435A CN 110498620 A CN110498620 A CN 110498620A
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- Prior art keywords
- calcium
- calcium hydroxide
- powder
- calcium oxide
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Classifications
-
- 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
- C04B2/045—After-treatment of slaked lime
-
- 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
- C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds
-
- 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
Abstract
The invention discloses a kind of calcium stearate calcium hydroxide production technologies, specific steps include: limestone calcination, the carbonization sulfide of infrared machine choosing screening removal calcium oxide surface black, crushing, grinding, digestion, homogenizing, ageing, it is mixed with organic solvent, it is filtered after dispersion, collect filter residue, calcium hydroxide is made after drying, calcium hydroxide powder carries out air current classifying screening, obtains calcium hydroxide powder.The content for the calcium hydroxide that the present invention prepares is high, and impurity is few, and whiteness is high, and powder color difference is small, will not influence the quality of production of calcium stearate.
Description
Technical field
The present invention relates to calcium hydroxide production technology more particularly to a kind of lifes of the calcium hydroxide for calcium stearate production
Production. art.
Background technique
Calcium hydroxide is commonly called as white lime/calcium hydroxide, be widely used in water process, leather industry, papermaking, Industrial Boiler, desulfurization,
The industries such as depickling, chemical building material, application range are very extensive.Currently, the production and processing of calcium hydroxide is usually to utilize quick lime
(calcium oxide) obtains in digester through digestion process.However, this digestion process has the following deficiencies:
Calcium oxide raw material adds water reaction digestion after crushed, and the white lime being prepared, which is directly over, to be ground to obtain finished product,
Since calcium oxide raw material is to be obtained by calcium carbonate through high-temperature calcination, cause in raw material inevitably containing the incomplete carbon of calcining
Sour calcium, calcium carbonate, which is ground, to be mixed into white lime finished product, is caused white lime the active calcium ion content to decline, is seriously reduced the ripe stone of finished product
The quality of ash, influences the quality of production of calcium stearate；
1, current market sales of calcium hydroxide product content is all 90% or so, or even having content is 85%；
2, product impurity is more；
3, product whiteness is low, and between 80-85, and powder color difference is big.
Summary of the invention
The present invention causes calcium hydroxide quality lower to solve existing calcium hydroxide preparation method, and causes to produce
Calcium stearate quality the technical issues of being affected, a kind of calcium stearate calcium hydroxide production technology is provided, by this
The content for the calcium hydroxide that technique prepares is high, and impurity is few, and whiteness is high, and powder color difference is small.
A kind of calcium stearate calcium hydroxide production technology, which is characterized in that specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 30-45min, be then added
Surfactant continues to stir 45-65min, is eventually adding lower alcohol and continues to stir 25-35min, brings it about digestion reaction, obtain
Obtain calcium hydroxide powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 4~8 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, filter residue is collected, after dry
Calcium hydroxide is made；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by the calcium hydroxide in calcium hydroxide powder
It is separated with impurity, obtains calcium hydroxide powder.
In step 1, calcination temperature is 1300-1450 DEG C, and preheating temperature is 300-450 DEG C, cooling temperature 120-150
℃。
In step 5, milling time 6-8h, grinding temperature is 45-58 DEG C, grinding pressure 5-6.5MPa.
In step 6, the additional amount of water is the 35-42% of calcium oxide quality, and the amount of the surfactant of addition is calcium oxide
The 1.3-2.5% of quality, the amount of the lower alcohol of addition are the 0.5-1.5% of calcium oxide quality, and digestion temperature control is 35-38
℃。
In step 8, the organic solvent of addition is that solvent is ethyl alcohol, and the dosage of the organic solvent is calcium hydroxide quality
1.3-1.8 times.
The present invention has the following beneficial effects with respect to the prior art:
Calcium hydroxide powder produced by the present invention purity with higher and whiteness, and calcium hydroxide crystals surface shape
Keep rule.Powder after grinding is added in digestion reactor by the present invention, and water is added and stirs 30-45min, is then added
Surfactant continues to stir 45-65min, is eventually adding lower alcohol and continues to stir 25-35min, brings it about digestion reaction, obtain
Calcium hydroxide powder is obtained, surfactant, which is added, can reduce the surface energy of calcium hydroxide powder, avoid powder softening from reuniting, increasing
Add the compatibility of powder.The purity and dispersibility that the calcium hydroxide that digestion obtains can be effectively improved, make calcium hydroxide finished product
Acid-base neutralization ability is strong, improves the application value of calcium hydroxide.Lower alcohol, which is added, makes that the white lime particle by digestion is fine and smooth, grain
Degree is evenly distributed, and the activity of calcium hydroxide finished product significantly improves, and is conducive to improve calcium hydroxide end properties and desulfurization effect
Fruit.The present invention also needs to carry out air current classifying screening, and the calcium hydroxide in calcium hydroxide powder is separated with impurity, is further mentioned
The purity of high calcium hydroxide finished product.
Specific embodiment
The present invention will be further described with reference to the examples below, and described embodiment is only present invention a part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other embodiments used obtained, belong to protection scope of the present invention under the premise of creative work.
Embodiment 1
A kind of calcium stearate calcium hydroxide production technology, which is characterized in that specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 30min, surface is then added
Activating agent continues to stir 45min, is eventually adding lower alcohol and continues to stir 25min, brings it about digestion reaction, obtain calcium hydroxide
Powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 4 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, filter residue is collected, after dry
Calcium hydroxide is made；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by the calcium hydroxide in calcium hydroxide powder
It is separated with impurity, obtains calcium hydroxide powder.
In step 1, calcination temperature is 1300- DEG C, and preheating temperature is 300- DEG C, and cooling temperature is 120 DEG C.
In step 5, milling time 6h, grinding temperature is 45 DEG C, grinding pressure 5MPa.
In step 6, the additional amount of water is the 35% of calcium oxide quality, and the amount of the surfactant of addition is calcium oxide quality
1.3%, the amount of the lower alcohol of addition is the 0.5% of calcium oxide quality, and digestion temperature control is 35 DEG C.
In step 8, the organic solvent of addition is that solvent is ethyl alcohol, and the dosage of the organic solvent is calcium hydroxide quality
1.3 times.
Embodiment 2
A kind of calcium stearate calcium hydroxide production technology, which is characterized in that specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 45min, surface is then added
Activating agent continues to stir 65min, is eventually adding lower alcohol and continues to stir 35min, brings it about digestion reaction, obtain calcium hydroxide
Powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 8 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, filter residue is collected, after dry
Calcium hydroxide is made；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by the calcium hydroxide in calcium hydroxide powder
It is separated with impurity, obtains calcium hydroxide powder.
In step 1, calcination temperature is 1450 DEG C, and preheating temperature is 450 DEG C, and cooling temperature is 150 DEG C.
In step 5, milling time 8h, grinding temperature is 58 DEG C, grinding pressure 6.5MPa.
In step 6, the additional amount of water is the 42% of calcium oxide quality, and the amount of the surfactant of addition is calcium oxide quality
2.5%, the amount of the lower alcohol of addition is the 1.5% of calcium oxide quality, and digestion temperature control is 38 DEG C.
In step 8, the organic solvent of addition is that solvent is ethyl alcohol, and the dosage of the organic solvent is calcium hydroxide quality
1.8 times.
Embodiment 3
A kind of calcium stearate calcium hydroxide production technology, which is characterized in that specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 38min, surface is then added
Activating agent continues to stir 50min, is eventually adding lower alcohol and continues to stir 30min, brings it about digestion reaction, obtain calcium hydroxide
Powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 5 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, filter residue is collected, after dry
Calcium hydroxide is made；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by the calcium hydroxide in calcium hydroxide powder
It is separated with impurity, obtains calcium hydroxide powder.
In step 1, calcination temperature is 1350 DEG C, and preheating temperature is 350 DEG C, and cooling temperature is 130 DEG C.
In step 5, milling time 7h, grinding temperature is 50 DEG C, grinding pressure 6MPa.
In step 6, the additional amount of water is the 38% of calcium oxide quality, and the amount of the surfactant of addition is calcium oxide quality
2%, the amount of the lower alcohol of addition is the 1% of calcium oxide quality, and digestion temperature control is 36 DEG C.
In step 8, the organic solvent of addition is that solvent is ethyl alcohol, and the dosage of the organic solvent is calcium hydroxide quality
1.4 times.
Embodiment 4
A kind of calcium stearate calcium hydroxide production technology, which is characterized in that specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 44min, surface is then added
Activating agent continues to stir 55min, is eventually adding lower alcohol and continues to stir 34min, brings it about digestion reaction, obtain calcium hydroxide
Powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 7 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, filter residue is collected, after dry
Calcium hydroxide is made；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by the calcium hydroxide in calcium hydroxide powder
It is separated with impurity, obtains calcium hydroxide powder.
In step 1, calcination temperature is 1350 DEG C, and preheating temperature is 400 DEG C, and cooling temperature is 125 DEG C.
In step 5, milling time 7.5h, grinding temperature is 49 DEG C, grinding pressure 5.5MPa.
In step 6, the additional amount of water is the 37% of calcium oxide quality, and the amount of the surfactant of addition is calcium oxide quality
2.2%, the amount of the lower alcohol of addition is the 1.2% of calcium oxide quality, and digestion temperature control is 37 DEG C.
In step 8, the organic solvent of addition is that solvent is ethyl alcohol, and the dosage of the organic solvent is calcium hydroxide quality
1.6 times.
The calcium hydroxide that above-described embodiment prepares is detected, the detection data obtained is as follows:
| Embodiment | Purity | Whiteness | Color difference |
| Embodiment 1 | 93% | 92 | It is minimum |
| Embodiment 2 | 94% | 93 | Nothing |
| Embodiment 3 | 93% | 91 | Nothing |
| Embodiment 4 | 93% | 93 | It is minimum |
Claims (5)
1. a kind of calcium stearate calcium hydroxide production technology, it is characterised in that: specific steps include:
Step 1, it after limestone surfaces being washed with water, puts into gas burning kiln and calcines, obtain block-like calcium oxide；
Step 2, by the way of the choosing of infrared ray machine, remove the calcium carbonate in calcium oxide；
Step 3, the carbonization sulfide of screening removal calcium oxide surface black；
Step 4, block-like calcium oxide is crushed in pulverizer；
Step 5, smashed calcium oxide is added in grinder and is ground；
Step 6, the powder after grinding is added in digestion reactor, water is added and stirs 30-45min, surface is then added
Activating agent continues to stir 45-65min, is eventually adding lower alcohol and continues to stir 25-35min, brings it about digestion reaction, obtain hydrogen
Lime powder；
Step 7, the homogenizing by step 6 gained calcium hydroxide powder by 4 ~ 8 hours, ageing；
Step 8, the calcium hydroxide Jing Guo step 6 is mixed with organic solvent, is filtered after dispersion, collected filter residue, be made after dry
Calcium hydroxide；
Step 9, the calcium hydroxide powder of acquisition is subjected to air current classifying screening, by calcium hydroxide powder calcium hydroxide with it is miscellaneous
Matter is separated, and calcium hydroxide powder is obtained.
2. a kind of calcium stearate calcium hydroxide production technology according to claim 1, it is characterised in that: in step 1, forge
Burning temperature is 1300-1450 DEG C, and preheating temperature is 300-450 DEG C, and cooling temperature is 120-150 DEG C.
3. a kind of calcium stearate calcium hydroxide production technology according to claim 1, it is characterised in that: in step 5, grind
Time consuming is 6-8h, and grinding temperature is 45-58 DEG C, grinding pressure 5-6.5MPa.
4. a kind of calcium stearate calcium hydroxide production technology according to claim 1, it is characterised in that: in step 6, water
Additional amount be calcium oxide quality 35-42%, the amount of the surfactant of addition is the 1.3-2.5% of calcium oxide quality, is added
Lower alcohol amount be calcium oxide quality 0.5-1.5%, digestion temperature control be 35-38 DEG C.
5. a kind of calcium stearate calcium hydroxide production technology according to claim 1, it is characterised in that: in step 8, add
The organic solvent entered is that solvent is ethyl alcohol, and the dosage of the organic solvent is 1.3-1.8 times of calcium hydroxide quality.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377621A (en) * | 2020-04-27 | 2020-07-07 | 南京赤博环保科技有限公司 | Production process of high-activity desulfurizer slaked lime |
| CN111606581A (en) * | 2020-05-07 | 2020-09-01 | 常熟市宏宇钙化物有限公司 | Preparation method of liquid calcium hydroxide |
| CN113562756A (en) * | 2021-08-05 | 2021-10-29 | 池州市贵兴非矿新材料有限公司 | Production process of calcium hydroxide |
| CN113666405A (en) * | 2021-08-11 | 2021-11-19 | 襄阳兴发化工有限公司 | Preparation method of high-specific-surface-area and high-whiteness calcium hydroxide |
| CN113955955A (en) * | 2021-12-10 | 2022-01-21 | 安徽前江超细粉末科技有限公司 | Method for solving problem of easy caking in high-activity lime slaking process |
| CN115321845A (en) * | 2022-08-31 | 2022-11-11 | 广西华纳新材料股份有限公司 | Preparation method of large-particle calcium hydroxide with regular morphology |
| CN115594209A (en) * | 2022-08-26 | 2023-01-13 | 杭州正和纳米科技有限公司（Cn） | High-recovery-rate superfine calcium carbonate production process and system |
| CN116282257A (en) * | 2023-03-21 | 2023-06-23 | 湖南耕石环境科技有限公司 | Nanoscale calcium-based active composite alkali and preparation method, preparation device and application thereof |
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| CN111377621A (en) * | 2020-04-27 | 2020-07-07 | 南京赤博环保科技有限公司 | Production process of high-activity desulfurizer slaked lime |
| CN111606581A (en) * | 2020-05-07 | 2020-09-01 | 常熟市宏宇钙化物有限公司 | Preparation method of liquid calcium hydroxide |
| CN113562756A (en) * | 2021-08-05 | 2021-10-29 | 池州市贵兴非矿新材料有限公司 | Production process of calcium hydroxide |
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| CN113955955A (en) * | 2021-12-10 | 2022-01-21 | 安徽前江超细粉末科技有限公司 | Method for solving problem of easy caking in high-activity lime slaking process |
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| CN115321845A (en) * | 2022-08-31 | 2022-11-11 | 广西华纳新材料股份有限公司 | Preparation method of large-particle calcium hydroxide with regular morphology |
| CN115321845B (en) * | 2022-08-31 | 2023-04-07 | 广西华纳新材料股份有限公司 | Preparation method of large-particle calcium hydroxide with regular shape |
| CN116282257A (en) * | 2023-03-21 | 2023-06-23 | 湖南耕石环境科技有限公司 | Nanoscale calcium-based active composite alkali and preparation method, preparation device and application thereof |
| CN116282257B (en) * | 2023-03-21 | 2024-05-03 | 湖南耕石环境科技有限公司 | Nanoscale calcium-based active composite alkali and preparation method, preparation device and application thereof |
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Application publication date: 20191126 |