CN101186451A - Method for calcining metallurgy lime by using lower calorific value converter coal gas - Google Patents
Method for calcining metallurgy lime by using lower calorific value converter coal gas Download PDFInfo
- Publication number
- CN101186451A CN101186451A CNA2007100929963A CN200710092996A CN101186451A CN 101186451 A CN101186451 A CN 101186451A CN A2007100929963 A CNA2007100929963 A CN A2007100929963A CN 200710092996 A CN200710092996 A CN 200710092996A CN 101186451 A CN101186451 A CN 101186451A
- Authority
- CN
- China
- Prior art keywords
- coal gas
- gas
- calorific value
- natural gas
- calcining
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses a method for calcining metallurgical lime by utilizing a converter gas with low heat value, which comprises the following steps: (1). converter gas and natural gas are mixed till the heat value of the mixture reaches 1800-2000kcal/Nm< 3 >; (2). the mixture of the converter gas and the natural gas are preheated to between 200 and 220 DEG C, and combustion air between 200 and 220 DEG C; (3). the limestone to be burned is preheated to the temperature above 800 DEG C and put into a kiln; (4).the preheated mixture of coal gas and nature gas and the combustion air are led into the kiln to be burned, so as to obtain the metallurgical lime. By making use of the method that by mixing the converter gas with low heat value and the natural gas to improve the heat value then to do kiln calcination and produce the metallurgical lime, the cost is lowered, and converter gas with the low heat vale is utilized, thus saving natural energy.
Description
Technical field
The present invention relates to a kind of method for calcinating of metallurgy lime, particularly a kind of method of utilizing the lower calorific value converter coal gas calcining metallurgy lime.
Background technology
In the calcined by rotary kiln metallurgy lime technology, but using gas or solid fuel, but the calorific value of fuel is had relatively high expectations.General requirement geseous fuel calorific value requires 3000kcal/Nm
3, serve as easy with Jiao's commentaries on classics or high coke mixed gas; Solid fuel then requires calorific value at 5500kcal/Nm
3In the prior art, generally adopting coke-oven gas or low-sulfur bituminous coal powder is main raw material, and its mixed gas calorific value is higher, can satisfy the needs of calcined by rotary kiln metallurgy lime technology.But because energy problem, low-sulfur bituminous coal is bought difficulty, and it is higher to make the coal dust cost; The coke-oven gas sulphur content is too high, needs special-purpose sweetener, the cost of increasing input.And other fuel all has cost height or the low shortcoming of calorific value.
In convertor steelmaking process, the carbon in the molten iron at high temperature generates the mixed gas of carbon monoxide and amounts of carbon dioxide with the oxygen that is blown into, and the top blowing oxygen converter gas of recovery contains carbon monoxide 60～80%, carbonic acid gas 15～20%, and nitrogen, hydrogen and micro amount of oxygen.Coal gas of converter will be recycled through a series of recovery technologies.Though coal gas of converter belongs to the reclaiming type energy, cost is relatively low, and its calorific value is lower, can't be used in separately in the calcined by rotary kiln metallurgy lime technology.
Therefore, if make lower calorific value converter coal gas be applied to rotary kiln calcining metallurgy lime technology, need process, and be equipped with specific processing method lower calorific value converter coal gas.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method of utilizing the lower calorific value converter coal gas calcining metallurgy lime, utilize lower calorific value converter coal gas to carry out the rotary kiln calcining metallurgy lime, reduce cost, save natural energy resources.
The method of utilizing the lower calorific value converter coal gas calcining metallurgy lime of the present invention may further comprise the steps,
(1) coal gas of converter is mixed with Sweet natural gas, making the mixture calorific value is 1800-2000kcal/Nm
3
(2) coal gas of converter and natural gas mixture are preheated to more than 200～220 ℃, combustion air is preheated to more than 200～220 ℃;
(3) will treat that the scoria lime stone is preheated to more than 800 ℃, puts into kiln;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime;
Further, the metallurgy lime that calcining is finished is cooled off by cooling air by reactor product cooler, the preheating of coal gas and Sweet natural gas and combustion air is that coal gas and natural gas mixture carry out heat exchange by two preheaters of coal gas/air and product cooling air in the step (1), finishes coal gas and Sweet natural gas and combustion air preheating;
Further, the preheating of Wingdale is that coal gas and natural gas mixture gas fume after burning in kiln are carried out preheating by the Wingdale preheater to Wingdale in the step (3);
Further, coal gas and Sweet natural gas blending ratio are 15: 1 by volume in the described step (1)
Further, in the step (2) coal gas of converter and natural gas mixture are preheated to 220 ℃, combustion air is preheated to 220 ℃;
Further, will treat in the step (3) that the scoria lime stone is preheated to 800 ℃.
Beneficial effect of the present invention: the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime of the present invention, utilize lower calorific value converter coal gas to mix back raising calorific value with Sweet natural gas and carry out the rotary kiln calcining metallurgy lime, reduce cost, save natural energy resources; Utilize the flue gas and the finished product of coming out of the stove that raw material and fuel are carried out preheating, make raw material part decomposition in advance, the calorific value of fuel gas is reduced significantly, when saving production cost, also utilize and reclaimed lower calorific value converter coal gas.
Embodiment
Embodiment one
The method of utilizing the lower calorific value converter coal gas calcining metallurgy lime of present embodiment may further comprise the steps,
(1) coal gas of converter is mixed with Sweet natural gas, making the mixture calorific value is 1800kcal/Nm
3
(2) coal gas and Sweet natural gas and combustion air carry out preheating, and coal gas and natural gas mixture and combustion air carry out heat exchange by two preheaters of coal gas/air and product cooling air, finish coal gas and Sweet natural gas and combustion air preheating; Coal gas of converter and natural gas mixture are preheated to 220 ℃, and combustion air is preheated to 220 ℃;
(3) will treat that the scoria lime stone after gas fume after burning in kiln is preheated to 820 ℃, puts into kiln with coal gas and natural gas mixture in the Wingdale preheater;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime;
(5) calcine the metallurgy lime of finishing and cooled off by cooling air by reactor product cooler, the cooling air after the heat exchange is to the two preheaters of coal gas/air.
Embodiment two
The method of utilizing the lower calorific value converter coal gas calcining metallurgy lime of present embodiment may further comprise the steps,
(1) coal gas of converter is mixed with Sweet natural gas, making the mixture calorific value is 1900kcal/Nm
3
(2) coal gas and Sweet natural gas and combustion air carry out preheating, and coal gas and natural gas mixture and combustion air carry out heat exchange by two preheaters of coal gas/air and product cooling air, finish coal gas and Sweet natural gas and combustion air preheating; Coal gas of converter and natural gas mixture are preheated to 210 ℃, and combustion air is preheated to 210 ℃;
(3) will treat that the scoria lime stone after gas fume after burning in kiln is preheated to 810 ℃, puts into kiln with coal gas and natural gas mixture in the Wingdale preheater;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime;
(5) calcine the metallurgy lime of finishing and cooled off by cooling air by reactor product cooler, the cooling air after the heat exchange is to the two preheaters of coal gas/air.
Embodiment three
The method of utilizing the lower calorific value converter coal gas calcining metallurgy lime of present embodiment may further comprise the steps,
(1) coal gas of converter is mixed with Sweet natural gas, making the mixture calorific value is 2000kcal/Nm
3
(2) coal gas and Sweet natural gas and combustion air carry out preheating, and coal gas and natural gas mixture and combustion air carry out heat exchange by two preheaters of coal gas/air and product cooling air, finish coal gas and Sweet natural gas and combustion air preheating; Coal gas of converter and natural gas mixture are preheated to 200 ℃, and combustion air is preheated to 200 ℃;
(3) will treat that the scoria lime stone after gas fume after burning in kiln is preheated to 800 ℃, puts into kiln with coal gas and natural gas mixture in the Wingdale preheater;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime;
(5) calcine the metallurgy lime of finishing and cooled off by cooling air by reactor product cooler, the cooling air after the heat exchange is to the two preheaters of coal gas/air.
Embodiment four
The method of utilizing the lower calorific value converter coal gas calcining metallurgy lime of present embodiment may further comprise the steps,
(1) with coal gas of converter and the Sweet natural gas mixed by 15: 1, according to the quality of coal gas and Sweet natural gas, the mixture calorific value is at 1800-2000kcal/Nm
3In the scope;
(2) coal gas and Sweet natural gas and combustion air carry out preheating, and coal gas and natural gas mixture and combustion air carry out heat exchange by two preheaters of coal gas/air and product cooling air, finish coal gas and Sweet natural gas and combustion air preheating; Coal gas of converter and natural gas mixture are preheated to 220 ℃, and combustion air is preheated to 220 ℃;
(3) will treat that the scoria lime stone after gas fume after burning in kiln is preheated to 800 ℃, puts into kiln with coal gas and natural gas mixture in the Wingdale preheater;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime;
(5) calcine the metallurgy lime of finishing and cooled off by cooling air by reactor product cooler, the cooling air after the heat exchange is to the two preheaters of coal gas/air.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can carry out the modification in the parameter area or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. method of utilizing the lower calorific value converter coal gas calcining metallurgy lime is characterized in that: may further comprise the steps,
(1) coal gas of converter is mixed with Sweet natural gas, making the mixture calorific value is 1800-2000kcal/Nm
3
(2) coal gas of converter and natural gas mixture are preheated to more than 200～220 ℃, combustion air is preheated to more than 200～220 ℃;
(3) will treat that the scoria lime stone is preheated to more than 800 ℃, puts into kiln;
(4) with burning in coal gas after the preheating and natural gas mixture and the combustion air introducing kiln, obtain metallurgy lime.
2. the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime according to claim 1, it is characterized in that: the metallurgy lime that calcining is finished is cooled off by cooling air by reactor product cooler, the preheating of coal gas and Sweet natural gas and combustion air is that coal gas and natural gas mixture and combustion air carry out heat exchange by coal gas/air pair preheaters and product cooling air in the step (1), finishes coal gas and Sweet natural gas and combustion air preheating.
3. the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime according to claim 1 and 2, it is characterized in that: the preheating of Wingdale is that coal gas and natural gas mixture gas fume after burning in kiln are carried out preheating by the Wingdale preheater to Wingdale in the step (3).
4. the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime according to claim 3 is characterized in that: coal gas and Sweet natural gas blending ratio are for being 15: 1 by volume in the described step (1).
5. the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime according to claim 4 is characterized in that: in the step (2) coal gas of converter and natural gas mixture are preheated to 220 ℃, combustion air is preheated to 220 ℃.
6. the method for utilizing the lower calorific value converter coal gas calcining metallurgy lime according to claim 5 is characterized in that: will treat in the step (3) that the scoria lime stone is preheated to 800 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100929963A CN101186451A (en) | 2007-11-16 | 2007-11-16 | Method for calcining metallurgy lime by using lower calorific value converter coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100929963A CN101186451A (en) | 2007-11-16 | 2007-11-16 | Method for calcining metallurgy lime by using lower calorific value converter coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101186451A true CN101186451A (en) | 2008-05-28 |
Family
ID=39479112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100929963A Pending CN101186451A (en) | 2007-11-16 | 2007-11-16 | Method for calcining metallurgy lime by using lower calorific value converter coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101186451A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001837A (en) * | 2010-10-14 | 2011-04-06 | 贾会平 | Method and device for calcining materials by using low calorific value fuel |
| CN102745914A (en) * | 2012-07-03 | 2012-10-24 | 江苏永钢集团有限公司 | Roasting process for active lime in rotary kiln |
| CN112229205A (en) * | 2020-09-29 | 2021-01-15 | 中信重工机械股份有限公司 | Active lime calcining system |
| CN115849737A (en) * | 2022-12-28 | 2023-03-28 | 包头钢铁（集团）有限责任公司 | Macez kiln calcining method for high-powder-surface-rate lime |
-
2007
- 2007-11-16 CN CNA2007100929963A patent/CN101186451A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001837A (en) * | 2010-10-14 | 2011-04-06 | 贾会平 | Method and device for calcining materials by using low calorific value fuel |
| CN102745914A (en) * | 2012-07-03 | 2012-10-24 | 江苏永钢集团有限公司 | Roasting process for active lime in rotary kiln |
| CN112229205A (en) * | 2020-09-29 | 2021-01-15 | 中信重工机械股份有限公司 | Active lime calcining system |
| CN115849737A (en) * | 2022-12-28 | 2023-03-28 | 包头钢铁（集团）有限责任公司 | Macez kiln calcining method for high-powder-surface-rate lime |
| CN115849737B (en) * | 2022-12-28 | 2024-03-08 | 包头钢铁（集团）有限责任公司 | Maerz kiln calcination method for high powder surface rate lime |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106892578B (en) | A kind of full recycling CO2Lime kiln device | |
| US20210078869A1 (en) | Method for preparing calcium oxide using a multistage suspension preheater kiln | |
| CN101538630B (en) | Process and device for preparing chromium iron by using chromium ore powder | |
| KR101677719B1 (en) | Method and apparatus for producing direct reduced iron utilizing a source of reducing gas comprising hydrogen and carbon monoxide | |
| CN1896286B (en) | Method for producing direct iron-reduction by iron-ore briquet self-production reproduced gas | |
| KR101304686B1 (en) | Part reduced iron for blast furnace and method thereof | |
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN105838838B (en) | Method for preparing pure steel by coal gas direct reduction one-step method | |
| CN105908061A (en) | Method for producing high-carbon ferrochrome | |
| CN114853369A (en) | Method and apparatus for preparing calcined compound for producing calcined product | |
| CN101525678A (en) | Method of replacing lime with limestone for slagging and producing steel in oxygen top blown converter | |
| AU2007316519A1 (en) | Process for manufacturing clinker with controlled CO2 emission | |
| CN102180604B (en) | Spinning bed equipment and process for producing high-activity lime with spinning bed | |
| CN108675655A (en) | A kind of lime kiln device using hot wind | |
| CN103451344A (en) | CEO compound smelting reduction ironmaking plant and technology | |
| CN113816412A (en) | Method for firing calcium oxide by carbide slag | |
| WO2022227184A1 (en) | Comprehensive utilization method for bottom-top composite blowing smelting reduction of high-iron red mud | |
| CN106119449B (en) | A kind of blast furnace whole world group smelting process | |
| CN101186451A (en) | Method for calcining metallurgy lime by using lower calorific value converter coal gas | |
| CN107904398A (en) | A kind of short route iron-smelting device and its without Jiao without nitre energy conservation and environmental protection short route iron smelting method | |
| JP2002060254A (en) | Shaft type lime kiln and production process of quicklime | |
| CN105152141B (en) | A kind of gypsum relieving haperacidity thermal technology and device | |
| CN212669567U (en) | Powder lime calcining and reforming system based on novel dry-process cement clinker calcining system | |
| JPS6247921B2 (en) | ||
| CN115259102A (en) | Process and equipment for preparing concentrated sulfur dioxide flue gas and silicate clinker by flue gas splitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080528 |