CN1056474A - The production method of high reactivity, high-purity hydrogen calcium oxide - Google Patents
The production method of high reactivity, high-purity hydrogen calcium oxide Download PDFInfo
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- CN1056474A CN1056474A CN 91106441 CN91106441A CN1056474A CN 1056474 A CN1056474 A CN 1056474A CN 91106441 CN91106441 CN 91106441 CN 91106441 A CN91106441 A CN 91106441A CN 1056474 A CN1056474 A CN 1056474A
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- production method
- digestion
- calcium hydroxide
- unslaked lime
- calcium
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Abstract
A kind of production method of high reactivity high-purity hydrogen calcium oxide.The compound field that belongs to calcium.Be by Wingdale, coke through calcining, produce active higher unslaked lime, again through broken, add water digestion, separate and make.The invention is characterized in: the unslaked lime after calcining, what sieve earlier before fragmentation, control in the digestive process is water-calcium ratio, in addition by control digestion temperature, digestion pressure, to isolated meal sieve again, technology such as pulverizing reaches more than the active high 300ml calcium hydroxide of producing, purity height, CaO content more than 72%, foreign matter content are below 1.7%.And product yield reaches more than 95%, satisfies the requirement of Chemical Manufacture such as epoxy chloropropane, high efficient bleaching powder.
Description
The production method of a kind of high reactivity, high-purity hydrogen calcium oxide, the compound field of genus calcium
At present, the domestic production that is used for the unslaked lime of building trade mainly adopts the cob brick kiln to fire.Development along with chemical industries such as pharmacy, rubber, chlorinated lime, purity and active requirement to calcium hydroxide improve constantly, therefore, the domestic multifuel combustion heavily fortified point kiln that begins to adopt than advanced, or rotary kiln is fired, although than the purity of cob brick klining system with quality increases but because starting material and process technology limit still do not satisfy service requirements.By retrieval, after the fifties, done a few thing abroad in this respect, but still undesirable.As Japanese Patent: clear 59-21521, the applying date: July 27 nineteen eighty-two, application number: clear 57-129653, applicant Toyo Soda Mfg. Co., Ltd., denomination of invention: the method for making higher-grade calcium hydroxide by unslaked lime.Disclose a kind of by unslaked lime and water through hydration, after making the unslaked lime emulsification rate reach 30～80%, the solid substance grading system is got the method for the emulsification of calcium hydroxide, by water cement ratio and the emulsification times of control during emulsification, realize controlling the purpose of emulsification rate, make its emulsification rate 80% when following, and time stage is less in the hope of making impurity, the higher calcium hydroxide this method of grade is much improved than other technology purity, and activity also has raising, but still does not reach higher requirement.United States Patent (USP): the patent No. 2894820, the applying date: January 2 nineteen fifty-three, denomination of invention: the method for producing lumps white lime.System's hydration in hydration reactor with unslaked lime and water, obtain moist thick white lime, drying device drying again, by the separator sorting, be divided into fine powder and agglomerate, again agglomerate pulverized, obtain lumps white lime, its main purpose is to improve plasticity index, and the product main application is overlay coating or fragment of brick mortar.
Purpose of the present invention is exactly to fall behind at technology in the prior art, and the purity of the calcium hydroxide of producing and active not high problem provide a kind of yield height, are suitable for the high reactivity of batch suitability for industrialized production, the production method of high-purity hydrogen calcium oxide.
The objective of the invention is to realize in the following way:
Wingdale, coke are produced active higher unslaked lime through calcining, again through broken, add water digestion, separate and make.The invention is characterized in: the unslaked lime after calcining, before fragmentation, sieve earlier, what control in the digestive process is water-calcium ratio.
Purpose of the present invention also can realize in the following way: promptly through the product separation diameter less than 44 μ m 〉=80%, 44 μ m-149 μ m≤20%, diameter greater than 149 μ m can be again through screening, pulverize, send into again separator.
Purpose of the present invention also can realize in the following way: its bed drain purge of screening before promptly broken is 5～20%.
Purpose of the present invention also can realize in the following way: promptly the water-calcium ratio of controlling in the digestive process is 0.55～0.80.
Purpose of the present invention also can realize in the following way: promptly the temperature of controlling in the digestive process is 90～190 ℃, digestion pressure is-290～-800Pa.
Purpose of the present invention also can realize in the following way: i.e. digestion generally is controlled at 3～25mm with the unslaked lime granularity, and digestive process and its bed drain purge of separation back screening are 2～15%.
Purpose of the present invention also can realize in the following way: the promptly described higher unslaked lime of activity of selecting for use, CaO content is 83～92%, activity (50g, 4mol/LHcL10 minute method): 230～400ml.
The production method of calcium hydroxide of the present invention, system is by complete digestion Study on Theory that liquid-solid phase one gas-solid in the calcium oxide digestion is walked abreast mutually, scientifically control water-calcium ratio, digestion temperature, digestion pressure, and by improvement to calcining process, making the unslaked lime of producing itself is that higher activity is arranged, again in technological process, promptly before digestion with separate twice screening in back, make the product of producing reach high purity, highly active purpose.
Compared with prior art: advantage of the present invention is:
1, high reactivity: can reach more than the 300ml.
2, high purity: CaO content reaches more than 72%, foreign matter content: SiO
2, Al
2O
3, Fe
2O
3, MgO is less than 1.70%, CO
2Content is less than 1.10%.
3, yield height: can reach more than 95.1%, can be mass-produced.
4, high fineness, low moisture content are with the screen over-size ∠ 10% of screen over-size ∠ 5%, the 44 μ m of 590 μ m mesh screen surpluses, 0.00,149 μ m.
5, satisfy the requirement of Chemical Manufacture such as epoxy chloropropane, high efficient bleaching powder, can replace caustic soda, save a large amount of caustic soda and the energy.
Fig. 1 is the technological process of production synoptic diagram of calcium hydroxide of the present invention.
Describe the production technology of calcium hydroxide of the present invention in detail below in conjunction with accompanying drawing:
Get lime stone and coke is calcined, be the vibrosieve of 5～15mm to the calcium oxide screen cloth calcined, remove impurity more " plain ash ", be crushed to again about 5～25mm, obtain the high activity calcium oxide of effective ingredient more than 90%, claim dispenser to supply with the predigestion device by airtight adjuster through constant. Quality situation and quantity delivered ratio according to calcium oxide, press the scope of water-calcium ratio 0.55～0.80, automatically regulate amount of water with control valve, make it in pre-sliding device tentatively to digest in mix and blend 5-15 minute, 90～190 ℃ of control digestion temperature, and then send into ager stop further digestion in 10-40 minute, to guarantee the catapepsis reaction. Calcium hydroxide after the catapepsis enters efficient wind selecting separator to be separated. According to the principle of centrifugal force and centripetal force, by regulating the separating degree value, size particles is separated, fine powder is the desired particle size finished product. Meal sieves through vibratory sieve again, can be according to requirement transposing 3mm～0.5mm or the littler vibration screen of product to purity, and screenings carries out the selection by winnowing separation after entering vibration abrasive dust mill again, improves the digestion yields of calcium oxide. Oversize is then drained as the meal bits.
Embodiment 1:
CaCO in the Wingdale
3Content 96%, CaO content 83% in the unslaked lime, activity 230ml, the lime bed drain purge is 20%, water-calcium ratio 0.55, digestion unslaked lime granularity 25mm, 90 ℃ of digestion temperature, digestion pressure-290Pa, during bed drain purge 15%, the every after tested quality index of producing by the accompanying drawing method of calcium hydroxide is as follows in the digestive process:
CaO SiO
2+ AL
2O
3+ Fe
2O
3+ MgO CO
2Activity
72.50% 1.70% 1.10% 300
Embodiment 2:
CaCO in the Wingdale
3Content 97.5%, CaO content 88% in the unslaked lime, activity 280ml lime bed drain purge 10%, water-calcium ratio 0.60, digestion digests 110 ℃ of temperature with lime granularity 10mm, digestion pressure-500Pa, during bed drain purge 10%, it is as follows to produce the every after tested quality index of calcium hydroxide by accompanying drawing 1 method in the digestive process:
CaO SiO
2+ Al
2+ Fe
2O
3+ MgO CO
2Activity
72.65% 1.61% 0.96% 312
Embodiment 3:
CaCO in the Wingdale
3Content is 99%, CaO content 92% in the unslaked lime, activity 400ml lime bed drain purge is 5%, water-calcium ratio is 0.80, digestion digests 190 ℃ of temperature with lime granularity 3mm, digestion pressure-800Pa, during bed drain purge 2%, the every after tested quality index of producing by the method for accompanying drawing 1 of calcium hydroxide is as follows in the digestive process:
CaO SiO
2+ Al
2+ Fe
2O
3+ MgO CO
2Activity
73.40% 1.28% 0.72% 326
Calcium hydroxide with production method production of the present invention, be mainly used in the production of producing epoxy chloropropane, high efficient bleaching powder, acetylene cylinder filler, calcium grease lubricating oil, also be widely used in and produce propylene oxide, general high test bleaching powder, petrochemical complex and rubber industry additive, feed and improve the soil, soft water processing etc.The Qilu Petrochemical chlor-alkali plant is used high reactivity high-purity hydrogen calcium oxide of the present invention, produces epoxy chloropropane, and per ton reduce cost surplus in the of 1500 yuan can be saved 5,250 ten thousand yuan of moneys the whole year, saves 4.5 ten thousand tons in caustic soda.
Claims (7)
1, the production method of a kind of high reactivity, high-purity hydrogen calcium oxide, be by Wingdale, coke through calcining, produce active higher unslaked lime, again through broken, add water digestion, separate and make.The invention is characterized in: the unslaked lime after calcining, sieving what control in the digestive process before fragmentation earlier is water-calcium ratio.
2, according to the production method of the described calcium hydroxide of claim 1, it is characterized in that: through the product separation diameter less than 44 μ m 〉=80%, 44～149 μ m≤20%, diameter greater than 149 μ m can be again through screening, pulverize and send into separator again.
3, according to the production method of the described calcium hydroxide of claim 1, it is characterized in that: its bed drain purge of screening before broken is 5～20%.
4, according to the production method of the described calcium hydroxide of claim 1, it is characterized in that: the water-calcium ratio of controlling in the digestive process is 0.55～0.80.
5, according to the production method of the described calcium hydroxide of claim 1, it is characterized in that the temperature of controlling in the digestive process is 90～190 ℃, digestion pressure is-290～-800Pa
6, according to the production method of the described calcium hydroxide of claim 1.2, it is characterized in that: digestion generally is controlled at 3～25mm with the unslaked lime granularity, and digestive process and its bed drain purge of separation back screening are 2～15%.
7, according to the production method of the described calcium hydroxide of claim 1, it is characterized in that: the described higher unslaked lime of activity of selecting for use, CaO content 83%～92%, activity (50g, 4mol/LHcL, 10 minutes methods); 230～400ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106441 CN1024125C (en) | 1991-06-04 | 1991-06-04 | Productive method of high-activity and-urity calcium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106441 CN1024125C (en) | 1991-06-04 | 1991-06-04 | Productive method of high-activity and-urity calcium hydroxide |
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| Publication Number | Publication Date |
|---|---|
| CN1056474A true CN1056474A (en) | 1991-11-27 |
| CN1024125C CN1024125C (en) | 1994-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106441 Expired - Fee Related CN1024125C (en) | 1991-06-04 | 1991-06-04 | Productive method of high-activity and-urity calcium hydroxide |
Country Status (1)
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|---|---|
| CN (1) | CN1024125C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0733602A1 (en) * | 1995-03-21 | 1996-09-25 | Rheinische Kalksteinwerke GmbH. | Process for making milk of lime |
| CN1092615C (en) * | 1996-04-24 | 2002-10-16 | 矢桥工业株式会社 | Process for producing clacium hydroxide |
| CN100357219C (en) * | 2006-01-20 | 2007-12-26 | 东北大学 | Method for preparing compact calcium oxide sand |
| CN100450584C (en) * | 2006-12-22 | 2009-01-14 | 清华大学 | Preparation method of desulfurizer powder by quick hydration reaction and device thereof |
| CN101503208B (en) * | 2009-03-13 | 2011-02-09 | 杭州稳健钙业有限公司 | Process for preparing high concentration milky calcium hydroxide |
| CN102153923A (en) * | 2011-02-24 | 2011-08-17 | 张振慧 | High-strength, scrubbing-resistant and environment-friendly dry powder emulsion coating |
| CN102531016A (en) * | 2011-12-30 | 2012-07-04 | 湖南省产商品质量监督检验院 | Production method of food-grade calcium hydroxide |
| CN105621379A (en) * | 2016-04-13 | 2016-06-01 | 四川绵竹市盘龙矿物质有限责任公司 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
| CN106145714A (en) * | 2016-08-29 | 2016-11-23 | 绵竹市拱星氧化钙厂 | High-temperature energy-conservation burnt lime slaking device |
| CN106219585A (en) * | 2016-07-08 | 2016-12-14 | 武汉科技大学 | A kind of dense granule calcia material and preparation method thereof |
| CN107416883A (en) * | 2017-09-13 | 2017-12-01 | 洛阳冀能新材料有限公司 | A kind of ore resource method of comprehensive utilization in calcium carbonate mine |
| CN108046617A (en) * | 2017-12-25 | 2018-05-18 | 上海盛宝冶金科技有限公司 | A kind of high-purity metallurgy lime and preparation method thereof |
| CN108911710A (en) * | 2018-08-24 | 2018-11-30 | 武汉科技大学 | A kind of calcium oxide particle and preparation method thereof |
| 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 |
| 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 |
-
1991
- 1991-06-04 CN CN 91106441 patent/CN1024125C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0733602A1 (en) * | 1995-03-21 | 1996-09-25 | Rheinische Kalksteinwerke GmbH. | Process for making milk of lime |
| CN1092615C (en) * | 1996-04-24 | 2002-10-16 | 矢桥工业株式会社 | Process for producing clacium hydroxide |
| CN100357219C (en) * | 2006-01-20 | 2007-12-26 | 东北大学 | Method for preparing compact calcium oxide sand |
| CN100450584C (en) * | 2006-12-22 | 2009-01-14 | 清华大学 | Preparation method of desulfurizer powder by quick hydration reaction and device thereof |
| CN101503208B (en) * | 2009-03-13 | 2011-02-09 | 杭州稳健钙业有限公司 | Process for preparing high concentration milky calcium hydroxide |
| CN102153923A (en) * | 2011-02-24 | 2011-08-17 | 张振慧 | High-strength, scrubbing-resistant and environment-friendly dry powder emulsion coating |
| CN102153923B (en) * | 2011-02-24 | 2013-01-23 | 张振慧 | High-strength, scrubbing-resistant and environment-friendly dry powder emulsion coating |
| CN102531016A (en) * | 2011-12-30 | 2012-07-04 | 湖南省产商品质量监督检验院 | Production method of food-grade calcium hydroxide |
| CN105621379A (en) * | 2016-04-13 | 2016-06-01 | 四川绵竹市盘龙矿物质有限责任公司 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
| CN106219585A (en) * | 2016-07-08 | 2016-12-14 | 武汉科技大学 | A kind of dense granule calcia material and preparation method thereof |
| CN106219585B (en) * | 2016-07-08 | 2017-07-25 | 武汉科技大学 | A kind of dense granule calcia material and preparation method thereof |
| CN106145714A (en) * | 2016-08-29 | 2016-11-23 | 绵竹市拱星氧化钙厂 | High-temperature energy-conservation burnt lime slaking device |
| CN107416883A (en) * | 2017-09-13 | 2017-12-01 | 洛阳冀能新材料有限公司 | A kind of ore resource method of comprehensive utilization in calcium carbonate mine |
| CN108046617A (en) * | 2017-12-25 | 2018-05-18 | 上海盛宝冶金科技有限公司 | A kind of high-purity metallurgy lime and preparation method thereof |
| CN108046617B (en) * | 2017-12-25 | 2020-09-29 | 上海盛宝冶金科技有限公司 | Method for preparing high-purity metallurgical lime |
| CN108911710A (en) * | 2018-08-24 | 2018-11-30 | 武汉科技大学 | A kind of calcium oxide particle and preparation method thereof |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024125C (en) | 1994-04-06 |
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Owner name: ZIBO QILU ETHYLENE CHEMICAL CO., LTD. Free format text: FORMER OWNER: QILU ETHYLENE INORGANIC CHEMICAL FACTORY Effective date: 20010626 |
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