CN103924018B - Change the method for tuyere medium sleeve - Google Patents
Change the method for tuyere medium sleeve Download PDFInfo
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- CN103924018B CN103924018B CN201410157807.6A CN201410157807A CN103924018B CN 103924018 B CN103924018 B CN 103924018B CN 201410157807 A CN201410157807 A CN 201410157807A CN 103924018 B CN103924018 B CN 103924018B
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- Prior art keywords
- medium sleeve
- tuyere medium
- tuyere
- sleeve
- water
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- 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
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- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
The invention provides a kind of method changing tuyere medium sleeve.Described tuyere medium sleeve is cavity type water jacket, and described method is changed by old tuyere medium sleeve under damping down state, said method comprising the steps of: a, stop supplying water in the cavity of tuyere medium sleeve, and dries up the residual water in tuyere medium sleeve; B, employing external heat source heating tuyere medium sleeve; C, water flowing cooling is carried out to tuyere medium sleeve; D, repeating said steps a to c are until tuyere medium sleeve can directly be left behind under external force.The mode that the present invention utilizes principle of expanding with heat and contracting with cold to adopt water flowing repeatedly, cut off the water supply and heat, solve ordinary method tuyere medium sleeve difficulty of directly leaving behind maybe cannot to leave behind the problem of tuyere medium sleeve, achieve and change tuyere small sleeve quickly and safely in blast furnace staying process, shorten the off-time.
Description
Technical field
The present invention relates to field operation before State of Blast Furnace, more particularly, relate to a kind of method changing tuyere medium jacket of blast furnace.
Background technology
Blast-furnace tuyere is the key part ensureing that blast furnace is normally produced, and is the critical process part in Iron and Steel Production on Iron Works.Blast-furnace tuyere generally includes tuyere big sleeve, tuyere medium sleeve (being also called air port two cover) and tuyere small sleeve (being also called air port three cover), usually, tuyere big sleeve by bolt together with the ring flange assembly connection on last furnace shell, tuyere medium sleeve is connected with tuyere big sleeve by the tight device of middle cover lining (or overlapping hold-down gear in claiming), and tuyere small sleeve is connected with tuyere medium sleeve by air port belly pipe.
Tuyere medium sleeve is mostly the cavity type water jacket that high-purity red copper is cast, tuyere body is kept to run on low-temperature condition by logical water-cooled mode, but due to its environment for use exceedingly odious, not only to bear the high temperature of more than about 1500 degree, also to bear the wearing and tearing with furnace charge, slag of washing away of high temperature flowing molten iron, therefore often need change tuyere medium sleeve.Changing tuyere medium sleeve operation is after tuyere medium jacket of blast furnace breakage, the routine operation carried out under damping down state, it comprise air port belly pipe of leaving behind, tuyere small sleeve, get the tight device of middle cover lining with unclamp tuyere medium sleeve and large cover connection, middle cover of leaving behind, install in cover, recover in the tight device of cover lining, the processes such as little cover, belly pipe are installed, the present invention is particularly useful for tuyere medium sleeve and produces the situation such as local displacement, distortion, and tuyere medium sleeve of leaving behind according to a conventional method is very difficult, tuyere medium sleeve of even cannot leaving behind.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to solve in above-mentioned prior art the one or more problems existed.Such as, an object of the present invention is a kind of method providing quick-replaceable tuyere medium sleeve.
To achieve these goals, the invention provides a kind of method changing tuyere medium sleeve.Described tuyere medium sleeve is cavity type water jacket, and described method is changed by old tuyere medium sleeve under damping down state, said method comprising the steps of: a, stop supplying water in the cavity of tuyere medium sleeve, and dries up the residual water in tuyere medium sleeve; B, employing external heat source heating tuyere medium sleeve; C, water flowing cooling is carried out to tuyere medium sleeve; D, repeating said steps a to c are until tuyere medium sleeve can directly be left behind under external force.
In one exemplary embodiment, in described step a, pressurized air is utilized to dry up residual water in tuyere medium sleeve.
In one exemplary embodiment, described step b adopts the mode of natural gas tube and the burning of oxygen hose synchronized mixes to heat tuyere medium sleeve.
In one exemplary embodiment, when first pass carries out described step a to c, after described step c, attempt leaving behind tuyere medium sleeve, if unsuccessful, tuyere medium sleeve is left behind, when repeating described step a to c again, between described step b and step c, carry out described trial to leave behind the operation of tuyere medium sleeve.
Compared with prior art, the mode that the present invention utilizes principle of expanding with heat and contracting with cold to adopt water flowing repeatedly, cut off the water supply and heat, solve ordinary method tuyere medium sleeve difficulty of directly leaving behind maybe cannot to leave behind the problem of tuyere medium sleeve, achieve and change tuyere small sleeve quickly and safely in blast furnace staying process, shorten the off-time.
Embodiment
Hereinafter, the method according to replacing tuyere medium sleeve of the present invention will be described in detail in conjunction with exemplary embodiment.
Change tuyere medium sleeve and comprise the operation changed by old tuyere medium sleeve and changed by new tuyere medium sleeve, according to the present invention, change under old tuyere medium sleeve is included in damping down state and carry out ground following steps:
After a, blast furnace staying, stopping supplying water (process of namely cutting off the water supply) in the cavity of tuyere medium sleeve, and adopt pressurized air to dry up residual water in tuyere medium sleeve, utilizing the high temperature of high furnace interior to carry out nature heating, intensification to overlapping greatly.Wherein, damping down refers to that blast furnace air supply system is out-of-blast, and namely air quantity is zero.
Then to leave behind air port belly pipe, tuyere small sleeve.
The mode that b, employing natural gas tube and oxygen hose synchronized mixes are burnt heats tuyere medium sleeve, slightly rubescent to tuyere medium sleeve, makes it be heated and expands.Wherein, natural gas pipe refers to the burning of oxygen hose synchronized mixes and is burnt together with the oxygen hose being connected with oxygen by the natural gas tube being connected with natural gas.
C, water flowing cooling is carried out to tuyere medium sleeve.
D, attempt leaving behind tuyere medium sleeve.If unsuccessful, then repeat above-mentioned steps a to c until tuyere medium sleeve can directly be left behind under external force.Wherein, second in time carrying out step a to c after it, between step b and step c, carry out described trial to leave behind the operation of tuyere medium sleeve.
The present invention utilizes the principle of expanding with heat and contract with cold, adopt tuyere medium sleeve water flowing repeatedly, the mode of cutting off the water supply, reheating, make to produce gap, displacement between tuyere big sleeve and middle cover, meanwhile, due to the effect of external high temperature heat source, the deflection of tuyere medium sleeve is large, copper tuyere medium sleeve produces softening, eliminate the front impact large because of resistance to deformation of middle cover heating, thus be beneficial to leaving behind of tuyere medium sleeve, shorten the time changing tuyere medium sleeve.
Usually, adopt the method for this example under damping down state, carry out "-heating-water flowing of cutting off the water supply ", just can ensure that tuyere medium sleeve is left behind, a few cases is carried out " cut off the water supply-heat-water flowing-cut off the water supply-heat " process, can ensure that tuyere medium sleeve is left behind, method is simple and reliable.
In addition, as mentioned above, the object of heating makes tuyere medium sleeve produce larger deformation quantity, and thus type of heating of the present invention preferably but " adopting the mode of natural gas tube and the burning of oxygen hose synchronized mixes " of being not limited in above-mentioned example.
In order to understand above-mentioned exemplary embodiment of the present invention better, below in conjunction with concrete example, it is further described.
Certain blast furnace staying programmed replacement tuyere small sleeve, after damping down, i.e. 8:50am, the water inlet of rapid shutoff tuyere medium sleeve, get the tight device of middle cover lining, water more than drying up in tuyere medium sleeve with pressurized air, 9:05am is left behind after air port belly pipe and tuyere small sleeve and is lighted natural gas tube, and lead to oxygen with oxygen hose and carry out aid burning, slightly rubescent to be heated to tuyere medium sleeve; Then water flowing cooling is carried out to tuyere medium sleeve; It is unsuccessful that 9:20am attempts tuyere medium sleeve of leaving behind.9:25am carries out second time and cuts off the water supply, and water more than drying up in tuyere medium sleeve with pressurized air, and then by the mode of natural gas tube and the burning of oxygen hose synchronized mixes, tuyere medium sleeve is heated, tuyere medium sleeve is successfully left behind by 9:40am, and cover in fresh wind port installs by 10:00am.
Can find out, the present invention utilizes principle of expanding with heat and contracting with cold to adopt water flowing repeatedly, cut off the water supply and the mode of external high temperature heating, ensure that in blast furnace staying process and change tuyere small sleeve quickly and safely, shorten the off-time.
Although above by describing the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that when not departing from the spirit and scope that claim limits, various amendment and change can be carried out to exemplary embodiment of the present invention.
Claims (2)
1. change a method for tuyere medium sleeve, described tuyere medium sleeve is cavity type water jacket, it is characterized in that, described method is changed by old tuyere medium sleeve under damping down state, and said method comprising the steps of:
A, stop supplying water in the cavity of tuyere medium sleeve, and dry up the residual water in tuyere medium sleeve;
B, employing external heat source heat tuyere medium sleeve;
C, water flowing cooling is carried out to tuyere medium sleeve;
D, repeating said steps a to c until tuyere medium sleeve can directly be left behind under external force,
Wherein, in described step a, pressurized air is utilized to dry up residual water in tuyere medium sleeve,
Described step b adopts the mode of natural gas tube and the burning of oxygen hose synchronized mixes to heat tuyere medium sleeve.
2. the method for replacing tuyere medium sleeve according to claim 1, it is characterized in that, when first pass carries out described step a to c, after described step c, attempt leaving behind tuyere medium sleeve, if unsuccessful, tuyere medium sleeve is left behind, when repeating described step a to c again, between described step b and step c, carry out described trial to leave behind the operation of tuyere medium sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157807.6A CN103924018B (en) | 2014-04-18 | 2014-04-18 | Change the method for tuyere medium sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157807.6A CN103924018B (en) | 2014-04-18 | 2014-04-18 | Change the method for tuyere medium sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103924018A CN103924018A (en) | 2014-07-16 |
| CN103924018B true CN103924018B (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410157807.6A Expired - Fee Related CN103924018B (en) | 2014-04-18 | 2014-04-18 | Change the method for tuyere medium sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103924018B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222344B (en) * | 2016-09-30 | 2018-05-01 | 武汉钢铁有限公司 | A kind of method for dismounting of two sets of blast-furnace tuyere |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348006A (en) * | 1976-10-15 | 1978-05-01 | Nippon Kokan Kk <Nkk> | Tuyere for blast furnace |
| CN2804114Y (en) * | 2005-07-07 | 2006-08-09 | 北京明诚技术开发有限公司 | Inlet device of blast furnace |
-
2014
- 2014-04-18 CN CN201410157807.6A patent/CN103924018B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348006A (en) * | 1976-10-15 | 1978-05-01 | Nippon Kokan Kk <Nkk> | Tuyere for blast furnace |
| CN2804114Y (en) * | 2005-07-07 | 2006-08-09 | 北京明诚技术开发有限公司 | Inlet device of blast furnace |
Non-Patent Citations (2)
| Title |
|---|
| 孙庚午.热胀冷缩法.《机修钳工手册》.河南科学技术出版社,2003,第275页. * |
| 张殿友.更换风口.《高炉炉前工》.冶金工业出版社,1978,第106,109-111页. * |
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|---|---|
| CN103924018A (en) | 2014-07-16 |
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Granted publication date: 20151021 Termination date: 20170418 |
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