CN1361291A - Blast furnace stopping process - Google Patents
Blast furnace stopping process Download PDFInfo
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- CN1361291A CN1361291A CN 00120653 CN00120653A CN1361291A CN 1361291 A CN1361291 A CN 1361291A CN 00120653 CN00120653 CN 00120653 CN 00120653 A CN00120653 A CN 00120653A CN 1361291 A CN1361291 A CN 1361291A
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- blast furnace
- furnace
- tapping
- blast
- blowing out
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Abstract
The present invention, iron-smelting blast furnace stopping process, aims at stopping blast furnace fast and reducing residual material amount inside the stopped furnace. The present invention includes stopping charging after the last batches charging and spraying atomized water to the upper furnace space to erduce temperature while reducing blast amount gradually. The present invention features the elimination of changing coke blank to burden material surface, reducing iron tapping times and amount during emptying charge lever, carrying out the last iron tapping after coke is burnt at and over the blast gate, and raising the pressure inside the furnace properly during tapping. The present invention can reduce residual material amount inside the stopped furnace greatly.
Description
The invention belongs to the ironmaking technology field, relate in particular to a kind of blowing out operation of iron-smelting blast furnace.
In ironmaking is produced, when furnace body is done bigger maintenance, need transfer blast furnace to the blowing out state by normal production status.Defective material amount after how finishing the transformation of this state quickly and safely and reducing blowing out as far as possible in the stove is the target that the blast furnace stopping operation is pursued always.
Present stopping process both domestic and external has: Wingdale is filled the blowing out method, the broken burnt blowing out method of filling, three kinds of empty material water spray blowing out methods.Wherein using more is empty material water spray blowing out method.This method be add on the charge level of the regular burden(ing) of before blowing out, packing at last clean burnt, fetch water or spray atomized water cooling to stove internal upper part space immediately, cut off coal gas simultaneously, open bleeding valve and big or small clock, reduce air quantity gradually, 1～2 meter the time, promptly out-of-blast more than charge level reaches air plane, and in furnace shutting down process, increase the number of casts as much as possible, descend fast to impel furnace charge.In actual production, the outstanding problem of utilizing this method blowing out to exist is: its defective material face is more than air plane after the blowing out, and the defective material amount is big, removes defective material to the rear portion and brings very big workload, also causes the waste of a certain amount of iron charge and coke simultaneously.
At the problems referred to above that sky material water spray blowing out method exists, the present invention proposes following improvement technical scheme, in the hope of reaching quick blowing out, defective material amount in the stove after the minimizing blowing out, the purpose of reduction iron charge and coke waste.
A kind of blast furnace stopping process, operating process is: stop charging before the blowing out behind last several the regular burden(ing)s of packing into, immediately to blast furnace upper space atomization water for cooling, cut off coal gas simultaneously, open bleeding valve and big or small clock, reduce air quantity gradually, it is characterized in that: cancellation adds clean burnt to the furnace charge face, in the empty stockline process of blowing out, suitably reduce the number of casts and the amount of tapping a blast furnace, to raise stock column, allow stock column remain at more than the air port, after treating that coke is fully burnouted in air port and above position thereof, tap a blast furnace for the last time, must suitably improve furnace pressure when tapping a blast furnace for the last time, be beneficial to out to the greatest extent slag iron, treat when furnace charge drops to the following limit position in air port out-of-blast.
Further, the number of casts and the amount of tapping a blast furnace in the empty stockline process of blowing out are advisable can guarantee that stock column remains at more than the air port, and tap drain is toward drop-down when tapping a blast furnace, and the downward modulation of hydraulic pressure big gun, iron perforater angle are mentioned maximum.
Further, when tapping a blast furnace the last time, must take to adjust the bleeding valve angle and increase the air quantity measure and improve furnace pressure, be beneficial to go out cupola well slag iron to the greatest extent fast, remaining furnace charge is dropped to below the air port significantly.
Adopt the present invention to carry out the blowing out operation, can reduce to the furnace charge position after the blowing out below the air port rapidly, thereby reduced defective material amount in the stove significantly, the corresponding reduction significantly to manpower, financial resources and time consumption that defective material in the cleaning stove takes place also can effectively shorten the blast furnace maintenance duration simultaneously; Add clean Jiao because the present invention has cancelled to the furnace charge face, reduced the coke waste.
Embodiment:
After carrying out the blowing out preparation, several the regular burden(ing)s of packing into earlier to charge level upper space atomization water for cooling, cut off coal gas immediately simultaneously, open bleeding valve and big or small clock, reduce air quantity gradually.During the empty stockline of blowing out, note controlling well the number of casts and the amount of tapping a blast furnace, remain at more than the air port to guarantee stock column.Tap drain is toward drop-down when tapping a blast furnace, and the downward modulation of hydraulic pressure big gun, iron perforater angle are mentioned maximum.If when tapping a blast furnace for the last time, must take to adjust the bleeding valve angle and increase the air quantity measure and improve furnace pressure, be beneficial to out slag iron to the greatest extent, treat when furnace charge drops to the following limit position in air port out-of-blast.
Claims (3)
1, a kind of blast furnace stopping process, operating process is: several the regular burden(ing)s of packing into earlier before the blowing out, immediately to charge level upper space atomization water for cooling, cut off coal gas simultaneously, open bleeding valve and big or small clock, reduce air quantity gradually, it is characterized in that, cancellation adds clean burnt to the furnace charge face, suitably reduce the number of casts and the amount of tapping a blast furnace in the empty stockline process of blowing out, allows stock column remain at more than the air port, after treating that coke is fully burnouted in air port and above position thereof, tap a blast furnace for the last time, must suitably improve furnace pressure when tapping a blast furnace for the last time, treat when furnace charge drops to the following limit position in air port out-of-blast.
2, blast furnace stopping process as claimed in claim 1, it is characterized in that, the number of casts and the amount of tapping a blast furnace in the empty stockline process of blowing out are advisable can guarantee that stock column remains at more than the air port, and tap drain is toward drop-down when tapping a blast furnace, and the downward modulation of hydraulic pressure big gun, iron perforater angle are mentioned maximum.
3, blast furnace stopping process as claimed in claim 1 or 2 is characterized in that, when tapping a blast furnace for the last time, can take to adjust the bleeding valve angle and increase the air quantity means and improve furnace pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00120653 CN1361291A (en) | 2000-12-29 | 2000-12-29 | Blast furnace stopping process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00120653 CN1361291A (en) | 2000-12-29 | 2000-12-29 | Blast furnace stopping process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1361291A true CN1361291A (en) | 2002-07-31 |
Family
ID=4588329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00120653 Pending CN1361291A (en) | 2000-12-29 | 2000-12-29 | Blast furnace stopping process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1361291A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041332A (en) * | 2010-12-31 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Blowing-out descending stockline control method for blast furnace |
| CN104878141A (en) * | 2015-06-07 | 2015-09-02 | 山西太钢不锈钢股份有限公司 | Blast furnace low pressure exhaust air cut coal gas blowing down method |
| CN106319116A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Method for reducing material surface smog through stock level lowering and spraying in blast furnace |
| CN109295271A (en) * | 2018-11-27 | 2019-02-01 | 南京钢铁股份有限公司 | A kind of method that blast furnace stockline dropping blowing out extends the gas recovery time |
| CN110306000A (en) * | 2019-07-31 | 2019-10-08 | 马鞍山钢铁股份有限公司 | A kind of blast furnace anatomical study stopping process and spray gun device |
| CN111270030A (en) * | 2020-03-20 | 2020-06-12 | 芜湖新兴铸管有限责任公司 | Environment-friendly blast furnace shutdown and furnace charge thermal-state cleaning process method |
-
2000
- 2000-12-29 CN CN 00120653 patent/CN1361291A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041332A (en) * | 2010-12-31 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Blowing-out descending stockline control method for blast furnace |
| CN102041332B (en) * | 2010-12-31 | 2012-04-18 | 攀钢集团钢铁钒钛股份有限公司 | Blowing-out descending stockline control method for blast furnace |
| CN104878141A (en) * | 2015-06-07 | 2015-09-02 | 山西太钢不锈钢股份有限公司 | Blast furnace low pressure exhaust air cut coal gas blowing down method |
| CN106319116A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Method for reducing material surface smog through stock level lowering and spraying in blast furnace |
| CN106319116B (en) * | 2015-06-30 | 2019-02-05 | 上海梅山钢铁股份有限公司 | A kind of method that the stockline spraying of blast furnace drop reduces charge level smog |
| CN109295271A (en) * | 2018-11-27 | 2019-02-01 | 南京钢铁股份有限公司 | A kind of method that blast furnace stockline dropping blowing out extends the gas recovery time |
| CN109295271B (en) * | 2018-11-27 | 2020-07-14 | 南京钢铁股份有限公司 | Method for prolonging time for recovering coal gas by blowing out blast furnace empty material line |
| CN110306000A (en) * | 2019-07-31 | 2019-10-08 | 马鞍山钢铁股份有限公司 | A kind of blast furnace anatomical study stopping process and spray gun device |
| CN110306000B (en) * | 2019-07-31 | 2021-09-07 | 马鞍山钢铁股份有限公司 | Blowing-out method and spray gun device for blast furnace dissection research |
| CN111270030A (en) * | 2020-03-20 | 2020-06-12 | 芜湖新兴铸管有限责任公司 | Environment-friendly blast furnace shutdown and furnace charge thermal-state cleaning process method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |