CN101462698B - Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas - Google Patents
Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas Download PDFInfo
- Publication number
- CN101462698B CN101462698B CN2009100291237A CN200910029123A CN101462698B CN 101462698 B CN101462698 B CN 101462698B CN 2009100291237 A CN2009100291237 A CN 2009100291237A CN 200910029123 A CN200910029123 A CN 200910029123A CN 101462698 B CN101462698 B CN 101462698B
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- production
- furnace gas
- gas
- plaster
- 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.)
- Expired - Fee Related
Links
Images
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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses an industrial method for recycling desulphurized plaster and blast furnace gas in iron-making production. Fumes exhausted from a sintering machine generate the desulphurized plaster after passing through a limestone-plaster fume desulphurizing device. Blast furnace gas is used as a fuel, and the desulphurized plaster is calcined in a calcinator at a high temperature of between 1,000 DEG C and 1,250 DEG C. CaSO4 undergoes a decomposition reaction under the reducing atmosphere that the blast furnace gas is used as a reducing agent. The generated CaO is thrown back into the sintering machine as a fusing agent for the production of sintering ores; and SO2 in tail gas is used for the production of sulphuric acid. In the method, the blast furnace gas generated in the iron-making production is adopted as the reducing agent to decompose the desulphurized plaster; the generated CaO is thrown into the sintering machine as the fusing agent for the production of the sintering ores; and the SO2 in the tail gas is used for the production of the sulphuric acid. The industrial method simultaneously solves the problems of the recycling of byproducts-desulphurized plaster and the blast furnace gas in the iron-making production technique and the problem of environmental pollution; moreover, the industrial method can reduce production cost.
Description
Technical field
The present invention relates to a kind of byproduct desulfurated plaster in producing and commercial run of blast furnace gas recycle of smelting iron.
Technical background
During ironmaking was produced, sinter fume needed the desulfurization discharging, adopted limestone/lime-gypsum method sulfur removal technology at present mostly.The sinter machine discharged flue gas produces a large amount of solid waste---desulfurated plaster behind the limestone-gypsum flue gas desulfurizing device, and is attended by the waste of sulphur resource.If desulfurated plaster is not fully utilized, certainly will bring to take a large amount of soils and cause secondary pollution.
In the prior art, a purposes of desulfurated plaster is a system producing sulfuric acid and jointly cement.The ultimate principle of desulfurated plaster system producing sulfuric acid and jointly cement is as follows: the desulfurated plaster drying and dewatering evenly becomes raw material with auxiliary materials such as coke, clays by proportioning mixing, grinding after becoming semi-hydrated gypsum, and raw material add in the rotary kiln after preheating.
2CaSO
4+C→2CaO+2SO
2↑+CO
2↑
CaO that generates and the SiO in the material
2, Al
2O
3, Fe
2O
3In generation mineralising water generation reaction mud grog, grog grinds into cement with gypsum, cinder etc. by proportioning.
Contain SO
2The kiln gas of (massfraction 8%-9%) makes SO through twice conversion under vanadium catalysis after electric precipitation, acid gas purification, drying
3, SO
3By massfraction is to make H after 98% the vitriol oil absorbs for 2 times
2SO
4
2SO
2+O
2→2SO
3
SO
3+H
2O→H
2SO
4
The advantage of this technology is: 1. calcium in the desulfurated plaster and sulphur are fully utilized; 2. desulfurated plaster is not produced secondary residue by digestion.Shortcoming is that production unit efficient is low, investment is big, energy consumption is high, strength of cement is low.
Traditional gypsum system producing sulfuric acid and jointly cement industry is finished by the long kiln of hollow, comprises that material homogenizer, drying and dewatering, raw material preparation, grog burn till, kiln gas relieving haperacidity and cement grinds six technological processs.But gypsum system producing sulfuric acid and jointly cement technology is failed large-scale promotion and development ﹠ construction so far, traces it to its cause, and mainly contains the problem of the following aspects:
1. grog burns till problem
Technology of producing cement is backward, throughput is low, hear rate is high, cement mark is low and unstable.
2. the employing of reductive agent
The employed reductive agent of desulfurated plaster reduction decomposition is based on coke in the desulfurated plaster system producing sulfuric acid and jointly cement, and this just makes the production cost of this technology improve.
For these reasons, gypsum system producing sulfuric acid and jointly cement industry fails to obtain large-scale promotion so far.Therefore, utilizing again of desulfurated plaster is still the realistic problem that needs to be badly in need of solution.In addition, by product---the utilization again of blast furnace gas of ironmaking production technique also is the problem that needs solution.
Summary of the invention
Technical problem to be solved by this invention, be to overcome the defective that prior art exists, desulfurated plaster and blast furnace gas recycle commercial run in a kind of ironmaking production is provided, the blast furnace gas that employing produces in producing with ironmaking is that reductive agent carries out the desulfurated plaster decomposition, the CaO that generates renders in the sinter machine and uses as flux, in order to agglomerate production, SO in the tail gas
2Be used for gas washing in SA production.What solved desulfurated plaster and blast furnace gas simultaneously utilizes problem and problem of environmental pollution again, also can reduce production costs.
The technical scheme that the inventive method adopted is:
The sinter machine discharged flue gas generates desulfurated plaster (CaSO behind the limestone-gypsum flue gas desulfurizing device
4); With the blast furnace gas is fuel, with desulfurated plaster high-temperature calcination under 1000 ℃ of-1250 ℃ of temperature condition in calcining furnace, makes reductive agent CaSO under reducing atmosphere with blast furnace gas
4Decomposition reaction takes place, and generates CaO and SO
2, reaction equation is as follows:
CaSO
4+CO→CaO+SO
2↑+CO
2↑；
The CaO that generates renders in the sinter machine and uses as flux, in order to agglomerate production.SO in the tail gas
2Enter gas washing in SA production workshop section, be used for gas washing in SA production.
The inventive method, adopting with the blast furnace gas that produces in the ironmaking production is that reductive agent carries out the desulfurated plaster decomposition, the CaO of generation renders in the sinter machine and uses as flux, in order to agglomerate production, SO in the tail gas
2Be used for gas washing in SA production.Solved the by product of ironmaking production technique simultaneously---desulfurated plaster and blast furnace gas utilize problem and problem of environmental pollution again, also can reduce production costs.
Description of drawings
Fig. 1 is the inventive method process flow diagram.
Embodiment
Below in conjunction with accompanying drawing, the inventive method is described in further detail.
As shown in Figure 1, during ironmaking is produced, the sinter machine discharged flue gas generates the powdery desulfurated plaster behind the limestone-gypsum flue gas desulfurizing device, it is in the calcining furnace of fuel that the powdery desulfurated plaster is admitted to the blast furnace gas, desulfurated plaster high-temperature calcination under 1000 ℃ of-1250 ℃ of temperature condition, make reductive agent with blast furnace gas, the desulfurated plaster more than 95% issues the reaction of separating estranged in high temperature reduction atmosphere, and the CaO of generation renders in the sinter machine and uses as flux, in order to agglomerate production, SO in the tail gas
2Volume content can reach 6-7%, enter gas washing in SA production workshop section, be used for gas washing in SA production.
Claims (1)
1. desulfurated plaster and blast furnace gas recycle commercial run during an ironmaking is produced, its processing step is:
The sinter machine discharged flue gas generates desulfurated plaster behind the limestone-gypsum flue gas desulfurizing device; With the blast furnace gas is fuel, and with desulfurated plaster high-temperature calcination under 1000 ℃ of-1250 ℃ of temperature condition in calcining furnace, blast furnace gas is made reductive agent CaSO under reducing atmosphere
4Decomposition reaction takes place, and generates CaO and SO
2, reaction equation is as follows:
CaSO
4+CO→CaO+SO
2↑+CO
2↑
The CaO backing up that generates is used as flux in sinter machine, in order to agglomerate production, and SO in the tail gas
2Be used for gas washing in SA production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100291237A CN101462698B (en) | 2009-01-13 | 2009-01-13 | Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100291237A CN101462698B (en) | 2009-01-13 | 2009-01-13 | Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101462698A CN101462698A (en) | 2009-06-24 |
| CN101462698B true CN101462698B (en) | 2010-12-29 |
Family
ID=40803526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100291237A Expired - Fee Related CN101462698B (en) | 2009-01-13 | 2009-01-13 | Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101462698B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009048370A1 (en) | 2009-07-24 | 2011-01-27 | Drysotec Gmbh | Process for the treatment of exhaust gases, in particular from steel production |
| CN102312050A (en) * | 2010-07-05 | 2012-01-11 | 湖北省通山县通力镁业有限责任公司 | Carrier and fluidization treatment method used for blowing desulfurization material |
| CN102303883B (en) * | 2011-07-11 | 2013-05-01 | 中国石油化工集团公司 | Method for preparing calcium oxide and sulfur by double-atmosphere fluidized roasting of desulfurated gypsum |
| CN102643038B (en) * | 2012-03-30 | 2013-12-18 | 中信重工机械股份有限公司 | Process for calcining high-activity lime by utilizing low-heating value blast furnace coal gas |
| CN106565116B (en) * | 2016-11-13 | 2019-02-26 | 北京工业大学 | It is a kind of to absorb SO in cement kiln flue gas using diatomite/calcium based compound additive2Method |
| CN110358910B (en) * | 2019-07-31 | 2021-07-23 | 马鞍山赤源冶金科技有限公司 | Method for returning desulfurized fly ash modified flux to iron ore sintering |
| CN110484715B (en) * | 2019-07-31 | 2021-07-23 | 马鞍山赤源冶金科技有限公司 | Desulfurization ash treatment method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3087790A (en) * | 1959-09-04 | 1963-04-30 | Iowa State College Res Found | Reductive decomposition of calcium sulfate |
| CN1865180A (en) * | 2005-12-02 | 2006-11-22 | 韦柳青 | Method for producing cement using desulfurized gypsum and fine coal ash |
-
2009
- 2009-01-13 CN CN2009100291237A patent/CN101462698B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3087790A (en) * | 1959-09-04 | 1963-04-30 | Iowa State College Res Found | Reductive decomposition of calcium sulfate |
| CN1865180A (en) * | 2005-12-02 | 2006-11-22 | 韦柳青 | Method for producing cement using desulfurized gypsum and fine coal ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101462698A (en) | 2009-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101462698B (en) | Industrial method for cyclic utilization of ironmaking production desulfurized gypsum and blast furnace gas | |
| CN201161187Y (en) | Composite cycle fluidized bed apparatus for phosphogypsum decomposition | |
| CN102502524B (en) | Method for producing sulfur dioxide from calcium sulfate and sulfur | |
| CN110451822B (en) | Recycling process for circularly calcining limestone and carbon dioxide by product gas | |
| CN104529196A (en) | Method for extracting ammonium and modifying electrolytic manganese residue | |
| CN110404936B (en) | Comprehensive treatment method for semi-dry desulfurized fly ash | |
| CN108970354B (en) | Device and method for three-generation of iron, sulfur and coal gas in pyrite smelting process | |
| CN101244811B (en) | Method for improving SO2 concentration in acid making technique with decomposition of calcium sulphate | |
| CN101337684A (en) | Method for recovering sulfur and co-producing calcium carbonate from desulphurization gypsum | |
| CN113909260A (en) | Manganese product clean production and resource recycling treatment process | |
| CN101891160B (en) | Method for directly preparing sulfur trioxide and sulfuric acid from plaster | |
| CN105217581B (en) | A kind of method of chemical gypsum and carbide slag comprehensive utilization | |
| JP2023530366A (en) | Quicklime production process and system with reduced carbon emissions | |
| CN103466675B (en) | Decomposition method of ardealite | |
| CN101955166A (en) | Method for decomposing semi-hydrated phosphogypsum | |
| CN105152141B (en) | A kind of gypsum relieving haperacidity thermal technology and device | |
| CN102127634B (en) | Molybdenite concentrate suspended-state roasting process and equipment | |
| CN101239706B (en) | Method for producing calcium sulfide from calcium sulfate | |
| CN103496682B (en) | A kind of Rock Phosphate (72Min BPL), Wingdale and silica produce the method for phosphoric acid jointly producing cement, synthetic ammonia | |
| CN104555947A (en) | Method and system for recovering electrolytic manganese slag | |
| CN111977616A (en) | Synergistic treatment method and system for desulfurized fly ash and desulfurized gypsum | |
| CN104724678A (en) | Method for fluidized catalytic decomposition of gypsum | |
| CN108298561A (en) | A kind of method that sulfate of ammoniac produces sulfuric acid, calcium sulfate, ammonium hydroxide | |
| JP2012201571A (en) | Manufacturing facility for quicklime and manufacturing facility and manufacturing process for slaked lime | |
| CN106044820A (en) | Method for producing strontium carbonate from carbon dioxide in exhaust gas |
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 | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGSHU ZIJIN INTELLECTUAL PROPERTY SERVICE CO., Free format text: FORMER OWNER: NANJING NORMAL UNIVERSITY Effective date: 20121212 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210046 NANJING, JIANGSU PROVINCE TO: 215500 SUZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121212 Address after: 215500 Changshou City South East Economic Development Zone, Jiangsu, Jin Road, No. 8 Patentee after: Changshu Zijin Intellectual Property Service Co., Ltd. Address before: Yuen Road in Nanjing city Jiangsu province 210046 Xianlin new town No. 1 Patentee before: Nanjing Normal University |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20190113 |