CN1537810A - Production method of high-performance calcium oxide - Google Patents
Production method of high-performance calcium oxide Download PDFInfo
- Publication number
- CN1537810A CN1537810A CNA031164986A CN03116498A CN1537810A CN 1537810 A CN1537810 A CN 1537810A CN A031164986 A CNA031164986 A CN A031164986A CN 03116498 A CN03116498 A CN 03116498A CN 1537810 A CN1537810 A CN 1537810A
- Authority
- CN
- China
- Prior art keywords
- calcium oxide
- production method
- roast
- performance
- performance calcium
- 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.)
- Granted
Links
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 20
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 229910021532 Calcite Inorganic materials 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 8
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 239000011230 binding agent Substances 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000000207 volumetry Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A process for preparing high-performance calcium oxide includes such steps as grinding calcium carbonate (calcite) to obtain fine powder, adding binder, extrusion shaping, and calcining. Its advantage is high quality and performance.
Description
Technical field
The present invention relates to metallurgical class, particularly relate to a kind of production method of high-performance calcium oxide.
Background technology
Calcium oxide is the irreplaceable and main auxiliary material that lacks in the steel-making.Ton steel usage quantity is at 50-100kg, and the method for producing has two kinds at present, and a kind of is the shaft furnace roast, is with block CaCO
3Fed in the kiln by charging machine with fuel, fuel adopts raw coal, and it evenly is laid in CaCO
3The centre of piece, the interior whole space of kiln is CaCO abrim
3With fuel, and motion from top to bottom, and hot gas flow is from bottom to up by material bed, CaCO
3In kiln, after processes such as super-dry, preheating, decomposition, cooling, produce CaO, after dumping device expel from kiln.This method technology is simple, can satisfy the requirement of common product, but its heat distribution inequality easily produces burning and shallow burning phenomenon, and generally the calcium oxide purity of its product is 88-92%, and activity degree is 180-280.Another kind method is the rotary kiln roast, is from kiln tail feeding, and fine coal is adopted in burning, by high pressure burner fine coal is sprayed into the kiln body, since the inclination and the revolution of cylindrical shell, block CaCO in the kiln
3One side is along circumferentially rolling, and one side moves vertically, sprays into fuel from kiln hood, burns into thermal-flame, hot gas and CaCO
3Flow in the opposite direction, heat exchange is after the kiln tail is discharged CaCO
3Behind a series of physical actions such as super-dry, preheating, decomposition, cooling and chemical reaction, produce CaO, by the low side discharging of kiln.The calcium oxide purity of general its product is 90-92%, and activity degree is 300-360, is characterized in the void content height, and 40% is spongy, the close 1.7-2.0g/cm that reaches of body
3Calcium oxide crystal grain is carefully few, the dissolving power height, it is easily broken and produce the problem of powder in heat-processed that but this method can not solve calcite (lime carbonate), and fuel directly contacts with material, obnoxious flavour that fuel is produced in combustion processes and impurity residue easily pollute product.More than the block CaCO of raw material of two kinds of methods
3Big or small inequality easily makes and burns insufficient and the generation temperature difference, shallow burning of generation and burn-off phenomenon in decomposition course.
Summary of the invention
The objective of the invention is provides a kind of production method of high-performance calcium oxide according to above-mentioned the deficiencies in the prior art part, this method before roast with lime carbonate CaCO
3Extrusion molding, fundamentally solved lime carbonate frangible in heat-processed, easily produce the problem of powder.
The object of the invention realizes being finished by following technical scheme: at first lime carbonate (calcite) is worn into 180-200 purpose ratio and surpassed 90% fine powder; Add wedding agent, stir; Use the shaper extrusion molding; At 1100-1150 ℃ of following roast.
Every index of the product of being produced-high-performance calcium oxide is compared with common calcium oxide and improved a lot, and its index is: calcium oxide purity is 94-95%, and activity degree is greater than 410, and body is close greater than 2.2g/cm
3, and being spongy more than 60%, S content is less than 0.015%, amount 50% capable of reducing using in the steel desulfurization process.
Advantage of the present invention is, because the raw material during roast has unified specification and density, thereby can accurately set decomposition temperature and time, the product calcium oxide quality height of being produced, and use properties is good.
The high-performance calcium oxide of being produced is in practical sulphur removal is used, comparable original calcium oxide reduces unit consumption 50%, the shortening time 40%, efficient improves 10%, can save national resources in a large number, improve the efficient of steel mill's desulfurization, shorten the time of hot metal pretreatment, reduce the temperature drop of hot metal pretreatment, increase the benefit of steel mill.
Concrete technical scheme
By the following examples feature of the present invention and other correlated characteristic are described in further detail, so that technician's of the same trade understanding:
The 200 purpose ratios of at first lime carbonate (calcite) being worn into surpass 90% fine powder; Add wedding agent calcium hydroxide, ratio is that lime carbonate accounts for 90%, and calcium hydroxide accounts for 10%; Stirred about 5-10 of time spent minute; With the shaper extrusion molding is that diameter phi 11-12cm, height h are 7-8cm, 10-16 hole honeycomb fashion work in-process; Dry to moisture and be less than 1%; Insulation is two hours in the 1100-1150 temperature range, roast; Product behind the roast is worn into 100 purpose ratios to be surpassed 98% fine powder and is finished product.
The kiln of present embodiment is fuel with heavy oil, produces atomizing by injection pump and high pressure combustion air uniform mixing, reaches abundant burning, and product is feeded from kiln hood, under the effect that advances loading machine, and CaCO
3Along continuous straight runs steadily enters branch and ungirds from the kiln hood preheating zone, after abundant decomposition, enters cooling zone fast, to guarantee the activity of products C aO.
The present invention is to the mensuration of activity degree, it is coarse grain volumetry test by West Germany, promptly get the particle lime of 50g 1-10mm and 2L40 ℃ distilled water and put into 3-4L volumetrical examination ware together, under condition of stirring (about 800 rev/mins), carry out titration to colourless till with phenolphthalein as indicator with 4NHcl, the hydrochloric acid consumption of this method regulation during with 5 minutes or 10 minutes represented the activity of lime.
Claims (3)
1, a kind of production method of high-performance calcium oxide is characterized in that at first lime carbonate (calcite) being worn into 180-200 purpose ratio and surpasses 90% fine powder; Add wedding agent again, stir; Use the shaper extrusion molding; At 1100-1150 ℃ of following roast; Product behind the roast is worn into 100 purpose ratios surpass 98% fine powder.
2, the production method of a kind of high-performance calcium oxide according to claim 1 is characterized in that described wedding agent refers to calcium hydroxide.
3, the production method of a kind of high-performance calcium oxide according to claim 1, it is characterized in that described at 1100-1150 ℃ of following roast, employed fuel is heavy oil, and it is to produce atomizing by injection pump and high pressure combustion air uniform mixing, reaches abundant burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116498 CN1226191C (en) | 2003-04-18 | 2003-04-18 | Production method of high-performance calcium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116498 CN1226191C (en) | 2003-04-18 | 2003-04-18 | Production method of high-performance calcium oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1537810A true CN1537810A (en) | 2004-10-20 |
| CN1226191C CN1226191C (en) | 2005-11-09 |
Family
ID=34320370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116498 Expired - Lifetime CN1226191C (en) | 2003-04-18 | 2003-04-18 | Production method of high-performance calcium oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1226191C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217974A (en) * | 2015-08-31 | 2016-01-06 | 建德市新安江永合塑胶厂 | High-quality calcium oxide production technique and device |
-
2003
- 2003-04-18 CN CN 03116498 patent/CN1226191C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217974A (en) * | 2015-08-31 | 2016-01-06 | 建德市新安江永合塑胶厂 | High-quality calcium oxide production technique and device |
| CN105217974B (en) * | 2015-08-31 | 2017-03-29 | 建德市新安江永合塑胶厂 | High-quality calcium oxide production technology and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1226191C (en) | 2005-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102225765B (en) | Mixed pellets composed of fine coal powder and limestone powder for producing calcium carbide | |
| CN103708455B (en) | The method preparing carbide | |
| CN1025749C (en) | Manufacturing method of pelletized sinter | |
| CN102296138B (en) | Method for preparing vanadium-iron intermetallic compound and titanium slag using linear moving bed pre-reduction-shaft furnace melting process | |
| CN101327928A (en) | A kind of calcium carbide production method | |
| CN101717883A (en) | Continuous production method of vanadium (iron) carbonitride and device thereof | |
| CN114250358A (en) | Super-thick material layer sintering process | |
| CN105036132B (en) | The method for preparing calcium carbide | |
| CN1114360A (en) | Method for producing direct reduced iron | |
| CN113564353B (en) | Iron ore powder agglomeration method and extrusion molding die | |
| CN1429920A (en) | Application of limonite as bedding material in method for producing pellet agglomerate | |
| CN106186740B (en) | A method of utilizing one one-step baking highly-purity magnesite of magnesite concentrate | |
| CN102776047B (en) | Method for molding calcium-base industrial powder | |
| CN1255559C (en) | Method for extracting vanadium by roasting material containing vanadium and its equipment | |
| CN107793049B (en) | Energy-saving production process for calcining limestone by using double-beam kiln | |
| CN104556037A (en) | Method for preparing calcium carbide | |
| CN101724747A (en) | Method for preparing briquetting furnace burden of submerged arc furnace with innocent adhesion and thermal treatment enhancement technology | |
| CN103708460A (en) | Method for preparing calcium carbide | |
| CN1226191C (en) | Production method of high-performance calcium oxide | |
| CN1038432C (en) | Method of production for direct reduction furnace charge by cold-consolidation briquetting method | |
| KR100568337B1 (en) | Manufacturing method of coal briquettes for molten reduction steel processing with excellent strength | |
| CN100507012C (en) | A method of producing direct reduced iron | |
| KR100627469B1 (en) | Coal briquette having superior strength for smelting reduction iron making process and briquetting method thereof | |
| CN106350632A (en) | Light roasting pressing ball for converter steelmaking and preparation method of light roasting pressing ball | |
| CN1358870A (en) | Carbon containing cold consolidated globular ore capable of keeping strength from normal temp. to high temp. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20051109 |