CN1621351A - Method for producing high activity calcium oxide - Google Patents
Method for producing high activity calcium oxide Download PDFInfo
- Publication number
- CN1621351A CN1621351A CN 200310105775 CN200310105775A CN1621351A CN 1621351 A CN1621351 A CN 1621351A CN 200310105775 CN200310105775 CN 200310105775 CN 200310105775 A CN200310105775 A CN 200310105775A CN 1621351 A CN1621351 A CN 1621351A
- Authority
- CN
- China
- Prior art keywords
- calcium oxide
- decarboxylation
- coke
- limestone
- producing high
- 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.)
- Pending
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention is method of producing high activity calcium oxide with limestone and coke or coal, and through heating inside vertical kiln for decarboxylation and subsequent sieving. Into the material, sodium chloride as solid or in saturated solution and in the amount of 0.5-2.5 wt% of limestone is added. The decarboxylation in the calcining band is at 850-1300 deg.c for 2-6 hr. Practice shows that the addition of sodium chloride increases the decomposition pressure of calcium carbonate, lowers the decomposition speed and crystallization speed of calcium oxide effectively, and eliminates the demerits of local over high temperature and over long calcining time. The product is regular alpha-type high active calcium oxide with loose first, CaO content over 94.5 % and activity higher than 370 ml.
Description
One, technical field: the present invention relates to the manufacture method of calcium oxide, particularly a kind of manufacture method of highly active calcium oxide.
Two, background technology: the traditional technology of making calcium oxide, continue to use ancient shaft furnace biscuiting technology at home always---promptly load in mixture in shaft furnace with Wingdale and coke or coal, decarboxylation after calcining, carbonic acid gas emptying or recovery, remaining solid is a calcium oxide in the kiln.The shortcoming of this technology is that raw material limestone and fuel are that solid loads in mixture, and are difficult to evenly; Kiln internal combustion band heat distribution is extremely inconsistent; The decarboxylic reaction time is difficult to accurate control.
Three, summary of the invention: purpose of the present invention is exactly under the prerequisite of utilizing existing shaft furnace equipment, and a kind of method of producing highly active calcium oxide is provided.
Technical scheme of the present invention is: designed a kind of by Wingdale and coke or coal, in shaft furnace through adding thermal decarboxylation, screening, the method for producing highly active calcium oxide is added the 0.5-2.5% sodium-chlor of Wingdale weight in the raw material.Sodium-chlor is solid, also can be saturated solution.Calcining zone heating decarboxylation temperature is 850-1300 ℃, and adding the thermal decarboxylation time is 2-6 hour.
Through practical proof, because the adding of sodium-chlor has increased divided calcium carbonate and separated air pressure, reduced the crystallization velocity of the decomposition rate and the calcium oxide of lime carbonate effectively, eliminated too high, the long drawback that produces of calcination time of local temperature in the calcining zone.Product is swept the anchor image through electron microscope and is confirmed; for crystal grain is independent mutually, more well-regulated α type highly active calcium oxide, its short texture porous, CaO＞94.5%; activity＞370ml is better than the quality level of the highly active calcium oxide that the similar kiln type in home and abroad produces.
The highly active calcium oxide that shaft furnace salt firing technique provided by the invention is produced, because its high reactivity, high quality, suddenly become important basic chemical raw materials, this kind α type highly active calcium oxide, specific surface area and surface energy are all big, calcium hydroxide with it makes after aquation has high reactivity, high purity equally, is widely used in chlorinated lime, high test bleaching powder, epoxy chloropropane, propylene oxide, calcium grease lubricating oil, acetylene cylinder filler, soft water processing, rubber and petrochemical complex additive and medicine production etc.Compared with prior art have: can utilize existing shaft furnace equipment, reduced investment, instant effect, additive is inexpensive, be easy to get, good product quality, active high, hear rate is lower.
Reached intended purposes of the present invention.
Four, description of drawings: do not have
Five, specific embodiment:
Embodiment 1: Wingdale contains CaCO
3＞97%, particle diameter 60-90mm; Coke, thermal value＞27300KJ/Kg, particle diameter 25-40mm; Sodium-chlor, commercial size.Three's weight ratio is a Wingdale: coke: sodium-chlor=100: 8.5: 1.0.After the mixing, use the windlass material loading, it is uniformly distributed in the shaft furnace, measure temperature with heat idol, the control calcining temperature is, preheating zone＜350 ℃, calcining zone 850-1100 ℃, cooling zone＜450 ℃.6 hours decarboxylation time, discharging, with the Vibrationsifter screening of sieve aperture 10mm, screen overflow is product, after testing, α type calcium oxide content 94.56%, crystal grain diameter 4.16 ~ 5.20um, activity 371.13ml (50g, 4mol/L HCL, 10 minutes methods).
Embodiment 2: Wingdale contains CaCO
3＞97%, particle diameter 60～90mm; Coke, thermal value＞27300KJ/kg, particle diameter 25～40mm; Sodium-chlor, commercial size.Three's weight ratio is a Wingdale: coke: sodium-chlor=100: 9.5: 1.5.After the mixing, use the windlass material loading, it is uniformly distributed in the shaft furnace, use thermocouple measuring temperature, the control calcining temperature is, preheating zone＜350 ℃, calcining zone 850-1150 ℃, cooling zone＜450 ℃.4 hours decarboxylation time, discharging, with the Vibrationsifter screening of sieve aperture 10mm, screen overflow is product, after testing, α type calcium oxide content 95.87%, crystal grain diameter 4.10～3.25um, activity 376.27ml (50g, 4mol/L HCL, 10 minutes methods).
Claims (2)
1, a kind of method of producing highly active calcium oxide is characterized in that, by Wingdale and coke or coal, through adding thermal decarboxylation, sieves in shaft furnace, adds the sodium-chlor of Wingdale weight 0.5-2.5% in the raw material.
2, according to the method for the described production highly active calcium oxide of claim 1, it is characterized in that described calcining zone heating decarboxylation temperature is 850-1300 ℃, adding the thermal decarboxylation time is 2-6 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105775 CN1621351A (en) | 2003-11-30 | 2003-11-30 | Method for producing high activity calcium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105775 CN1621351A (en) | 2003-11-30 | 2003-11-30 | Method for producing high activity calcium oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1621351A true CN1621351A (en) | 2005-06-01 |
Family
ID=34757409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310105775 Pending CN1621351A (en) | 2003-11-30 | 2003-11-30 | Method for producing high activity calcium oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1621351A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400452C (en) * | 2006-02-14 | 2008-07-09 | 赵凯 | Method for preparing active lime |
| CN101913638A (en) * | 2010-08-02 | 2010-12-15 | 何宜刚 | Micrometer calcium oxide, preparation method thereof and use thereof in preparation of biodiesel |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN102826770A (en) * | 2012-09-24 | 2012-12-19 | 太原钢铁(集团)有限公司 | Method for roasting ultralow-carbon lime in rotary kiln and lime product produced by same |
| CN103073204A (en) * | 2013-02-19 | 2013-05-01 | 唐杰 | Energy-saving preparation method for calcium oxide |
| CN103408051A (en) * | 2013-08-07 | 2013-11-27 | 中国科学院过程工程研究所 | High-activity and high-strength coupled regulation and control method for agglomerated calcium oxide |
| CN103466674A (en) * | 2013-09-12 | 2013-12-25 | 桂林市红星化工有限责任公司 | Preparation method of food-grade calcium hydroxide |
| CN105217670A (en) * | 2015-08-24 | 2016-01-06 | 成都理工大学 | A kind of production method of high-purity calcium oxide |
| 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 |
| CN107720798A (en) * | 2017-09-30 | 2018-02-23 | 广西华洋矿源材料有限公司 | The preparation method of active calcium oxide |
| CN110817919A (en) * | 2019-12-04 | 2020-02-21 | 新疆国峰嘉和环保科技有限公司 | Preparation method of calcium oxide balls regenerated from carbide slag |
| CN112174179A (en) * | 2019-08-09 | 2021-01-05 | 浙江天石纳米科技股份有限公司 | Industrial preparation method of high-reactivity nano calcium hydroxide powder |
-
2003
- 2003-11-30 CN CN 200310105775 patent/CN1621351A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400452C (en) * | 2006-02-14 | 2008-07-09 | 赵凯 | Method for preparing active lime |
| CN101913638A (en) * | 2010-08-02 | 2010-12-15 | 何宜刚 | Micrometer calcium oxide, preparation method thereof and use thereof in preparation of biodiesel |
| CN101913638B (en) * | 2010-08-02 | 2012-10-03 | 何宜刚 | Micrometer calcium oxide, preparation method thereof and use thereof in preparation of biodiesel |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN102225780B (en) * | 2011-04-19 | 2013-08-28 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN102826770A (en) * | 2012-09-24 | 2012-12-19 | 太原钢铁(集团)有限公司 | Method for roasting ultralow-carbon lime in rotary kiln and lime product produced by same |
| CN102826770B (en) * | 2012-09-24 | 2014-03-12 | 太原钢铁(集团)有限公司 | Method for roasting ultralow-carbon lime in rotary kiln and lime product produced by same |
| CN103073204A (en) * | 2013-02-19 | 2013-05-01 | 唐杰 | Energy-saving preparation method for calcium oxide |
| CN103408051B (en) * | 2013-08-07 | 2015-11-18 | 中国科学院过程工程研究所 | A kind of calcium oxide agglomerate high reactivity is coupled with high strength regulate and control method |
| CN103408051A (en) * | 2013-08-07 | 2013-11-27 | 中国科学院过程工程研究所 | High-activity and high-strength coupled regulation and control method for agglomerated calcium oxide |
| CN103466674A (en) * | 2013-09-12 | 2013-12-25 | 桂林市红星化工有限责任公司 | Preparation method of food-grade calcium hydroxide |
| CN105217670A (en) * | 2015-08-24 | 2016-01-06 | 成都理工大学 | A kind of production method of high-purity calcium oxide |
| CN105217670B (en) * | 2015-08-24 | 2017-08-15 | 成都理工大学 | A kind of production method of high carbonate-free lime |
| 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 |
| CN107720798A (en) * | 2017-09-30 | 2018-02-23 | 广西华洋矿源材料有限公司 | The preparation method of active calcium oxide |
| CN112174179A (en) * | 2019-08-09 | 2021-01-05 | 浙江天石纳米科技股份有限公司 | Industrial preparation method of high-reactivity nano calcium hydroxide powder |
| CN112174179B (en) * | 2019-08-09 | 2022-05-10 | 浙江天石纳米科技股份有限公司 | Industrial preparation method of high-reactivity nano calcium hydroxide powder |
| CN110817919A (en) * | 2019-12-04 | 2020-02-21 | 新疆国峰嘉和环保科技有限公司 | Preparation method of calcium oxide balls regenerated from carbide slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1621351A (en) | Method for producing high activity calcium oxide | |
| CN102826770B (en) | Method for roasting ultralow-carbon lime in rotary kiln and lime product produced by same | |
| CN106477609B (en) | Method for producing alumina by coal ash sulfuric acid curing | |
| CN110183099A (en) | A kind of manufacturing method of expanded porous glass particle | |
| CN103582611A (en) | Process for the mineralization of carbon dioxide | |
| CN106082715A (en) | Magnesite is used to prepare method and the application of gained magnesium oxide of light calcined magnesia | |
| US2695242A (en) | Magnesia-containing material | |
| CN1023996C (en) | Method for producing highly active calcium oxide | |
| CN108191269A (en) | A kind of production method of active lime | |
| CN108046617A (en) | A kind of high-purity metallurgy lime and preparation method thereof | |
| US2630616A (en) | Stabilized alumina pebbles | |
| CA1211932A (en) | Method and apparatus for calcining pulverulent raw material | |
| CN114433012A (en) | Forming method of molecular sieve adsorbent, molecular sieve adsorbent prepared by forming method and application of molecular sieve adsorbent | |
| CN108439828A (en) | A kind of production method of low-carbon active lime | |
| CN102838141A (en) | Process for producing magnesium hydrate by removing silicon and aluminum from magnesite | |
| JP3389642B2 (en) | Method for producing low soda alumina | |
| US3879514A (en) | Method of producing burned crystalline carbonate minerals | |
| CN114835412A (en) | Preparation process of fine calcium oxide | |
| CN1243687C (en) | Method for producing phosphoric acid and cement from phosphate ore by hot process | |
| CN110104666B (en) | Method for preparing anhydrous magnesium carbonate based on hydrothermal carbonization reaction | |
| JPH06293576A (en) | Porous silica-carbon composite body and its production | |
| CN112678841A (en) | Carbon zeolite composite material and application thereof | |
| CN111533149A (en) | Preparation method of light high-dispersion calcium oxide | |
| CN113772970B (en) | Method for preparing magnesium oxide by using magnesite | |
| CN114014640B (en) | High-alumina ceramic filler prepared from gamma alumina and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |