CN107254560A - The processing blast furnace crucibe method freezed and the iron mouthful oxygen rifle used - Google Patents
The processing blast furnace crucibe method freezed and the iron mouthful oxygen rifle used Download PDFInfo
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- CN107254560A CN107254560A CN201710334891.8A CN201710334891A CN107254560A CN 107254560 A CN107254560 A CN 107254560A CN 201710334891 A CN201710334891 A CN 201710334891A CN 107254560 A CN107254560 A CN 107254560A
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- oxygen rifle
- oxygen
- iron
- mouthful
- gobbed
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a kind of processing blast furnace crucibe method freezed and the oxygen rifle used, comprise the following steps：(1) blast furnace staying, stokehold dredging slag iron ditch carries out slag iron discharge preparation；(2) iron mouthful tapping machine loads onto drilling rod, at drill bit preboring iron mouthful to red point；(3) iron mouthful tapping machine changes oxygen rifle, and oxygen rifle is headed into iron mouth pore passage at red point；(4) oxygen and compressed air are passed through to oxygen rifle；(5) oxygen rifle is periodically moved back into tapping hole, discharges the slag iron mixture of scorification；(6) when the slag iron volume of mixture of discharge reaches 20% the 40% of cupola well volume, furnace compound wind；(7) operation of repeat step 5, and progressively add wind to recover furnace cylinder working state to thorough.When handling gobbed up using this method, the oxygen rifle used will can be discharged thoroughly after the slag iron mixture scorification that solidified in cupola well, rapid to recover furnace cylinder working state, significantly shortened the time of processing gobbed up, saved substantial amounts of manpower and materials cost.
Description
Technical field
The invention belongs to blast furnace iron-making process technical field, specifically it is a kind of handle method that blast furnace crucibe freezes and
The iron mouthful oxygen rifle used.
Background technology
Gobbed up is the major accident of blast fumance, is typically due in a large amount of leaks of cooling device to stove, feeding loses
Mistake overload, which fails the reasons such as discovery in time, accretion avalanche or the serious pipeline trip of air turbulence appearance, to be caused.Cupola well freezes
The blast furnace of knot, slag iron liquid, which loses flowability, normally to be discharged from iron mouthful, and slag iron liquid level rises a large amount of damage tuyere small sleeves, air quantity
Significantly atrophy, or even wind-engaging are difficult, and such as processing method is not proper, it is easy to occur repeatedly, cause more serious loss.
The method of conventional processing gobbed up is to retain the air port air-supply of iron mouthful top one to two, blocks remaining all wind
Mouthful, while the hand-held oxygen hose of flushing and casting work uninterruptedly burns square iron mouthful under air port, the solidification slag iron between iron mouthful and air port
Melting outflow, iron mouthful and air port insertion, then progressively disclose and open air port around and slowly exploit success, between this method needs blast-furnace man not
Disconnected operation, expends a large amount of manpowers and consumes a large amount of oxygen hoses simultaneously.When freezing serious, iron mouthful is difficult to burn through, can only be by sending
Air port beside wind air port is tapped a blast furnace as interim tapping hole, but site environment is complicated and changeable, may so cause burnt in stove
Even molten iron blast is gushed out in charcoal avalanche, expands accident.Conventional method thoroughly handles gobbed up and generally requires even several weeks a couple of days
Time, the manpower and materials cost during which expended is huge.
The content of the invention
Goal of the invention：To solve the defect of existing method, a kind of processing of present invention offer is rapid, use manpower and material resources sparingly cost
Processing gobbed up method；The present invention also provides a kind of oxygen rifle for being used to handle gobbed up.
Technical scheme：The method of processing gobbed up of the present invention, comprises the following steps：
(1) blast furnace staying, stokehold dredging slag iron ditch carries out slag iron discharge preparation；
(2) iron mouthful tapping machine loads onto drilling rod, at drill bit preboring iron mouthful to red point；
(3) iron mouthful tapping machine changes oxygen rifle, and oxygen rifle is headed into iron mouth pore passage at red point；
(4) oxygen and compressed air are passed through to oxygen rifle；
(5) oxygen rifle is periodically moved back into tapping hole, discharges the slag iron mixture of scorification；
(6) when the slag iron volume of mixture of discharge reaches the 20%-40% of cupola well volume, furnace compound wind；
(7) operation of repeat step 5, and progressively add wind to recover furnace cylinder working state to thorough.
Iron mouthful operation in above step is that all iron mouths of blast furnace are carried out simultaneously.
The oxygen rifle that processing gobbed up of the present invention is used, including screw rod and gun body, screw rod are welded on gun body afterbody,
Gun body includes forced air cooled tube and oxygen lance, and oxygen lance is inside forced air cooled tube, and forced air cooled tube is provided with oxygen provided with cooling gas air inlet, oxygen lance
Gas air inlet, oxygen rifle head is additionally provided with the outlet of cooling gas and oxygen outlet.
When handling gobbed up using the oxygen rifle, oxygen rifle is wrapped with asbestos cord, and oxygen rifle is mounted on tapping machine by screw rod, uses
Tapping machine heads into oxygen rifle in iron mouth pore passage, and asbestos cord blocks hole between oxygen rifle and iron mouth pore passage, from the access of oxygen air inlet
Oxygen is passed through compressed air to cool down oxygen rifle body to solidification slag iron in scorification cupola well from cooling gas air inlet.
Beneficial effect：Gobbed up is handled by the method for the present invention, the slag iron mixture solidified in cupola well can be burnt
Thoroughly discharge after molten, fast activating cupola well is rapid to recover furnace cylinder working state, and the oxygen rifle that this method is used is arranged on tapping machine
Mechanical work, is passed through compressed air cooling and is unlikely to be burnt during work, compared with the conventional method, the present invention significantly shortens processing cupola well
The time freezed, save substantial amounts of manpower and materials cost.
Brief description of the drawings
Fig. 1 is oxygen rifle diagrammatic cross-section of the present invention；
Fig. 2 is oxygen rifle muzzle schematic diagram of the present invention.
Embodiment
The method of processing gobbed up of the present invention uses the oxygen rifle of following structures：As shown in figure 1, including screw rod 1
With gun body 2, the afterbody of gun body 2 is closed with stainless steel plate, and screw rod 1 is welded on the afterbody stainless steel plate of gun body 2, the diameter of screw rod 1 and height
Stove tapping machine is matched, and can be arranged on tap hole of blast furnace；Gun body 2 is the sleeve pipe knot of two different tube diameters seamless steel pipe compositions
Structure, outside is DN50 forced air cooled tube 3, which is provided with cooling gas air inlet 31, air inlet 31 is located at close to the position of the afterbody of gun body 2
Put, cooling gas is the compressed air of adjustable pressure, and range of regulation is 0.3-0.8Mpa；Inside is DN32 oxygen lance 4, thereon
Provided with oxygen air inlet 41, oxygen air inlet 41 is located at close to the position of the afterbody of gun body 2, and is passed through from the tube wall of forced air cooled tube 3, is passed through
Oxygen range of regulation be 0.5-1.0Mpa；The head of gun body 2 is provided with cooling gas outlet 32 and oxygen outlet 42, cooling gas outlet 32
With oxygen outlet 42 at grade.The length of the oxygen rifle is consistent with the run of steel that blast furnace is used.
The method of processing gobbed up of the present invention uses following processing steps：
(1) damping down immediately after gobbed up occurs, the slag iron ditch of all iron mouthful of tissue blast-furnace man's cleaning blast furnace, the row of carrying out
The preparation of slagging iron.
(2) tapping machine of all iron mouthful in stokehold loads onto drilling rod, with φ more than 60 drill bit preboring iron mouthful, is drilled into red point position
Put, exit tapping machine.
(3) oxygen rifle of the present invention is wrapped with after asbestos cord, iron mouthful tapping machine is screwed in by screw rod, with tapping machine by oxygen rifle top
Enter the pre- iron mouth pore passage being drilled, push up to red position, asbestos cord seals up the space between oxygen rifle and iron mouth pore passage.
(4) oxygen rifle is cooled down into gas air inlet external compressed air pipeline, compressed air piping is provided with stop valve and pressure
Regulating valve, by the external oxygen channel of oxygen air inlet, is equally provided with stop valve and pressure-regulating valve, to oxygen rifle on oxygen channel
Oxygen and compressed air are passed through, oxygen pressure and compressed air pressure are dynamically adjusted according to oxygen rifle state, it is desirable to which oxygen pressure is big
In compressed air pressure.
(5) special messenger's guard's oxygen rifle working condition is arranged, oxygen rifle is periodically exited, the slag iron of scorification is discharged, if oxygen rifle scaling loss
Slag iron is sprayed, and oxygen and compressed air stop valve should be closed in time, disconnects source of the gas, oxygen rifle is more renewed after exiting scaling loss oxygen rifle.
(6) the slag iron volume of mixture of all iron mouthful discharges is estimated, when fused mass volume reaches the 20%- of cupola well volume
When 40%, furnace compound wind keeps airflow pressure to match.
(7) iron mouthful continuation burns oxygen with oxygen rifle, periodically exits oxygen rifle, discharges slag iron fused mass, and oxygen rifle is changed every time by oxygen rifle
Insertion depth is stepped up, until only having a small amount of fused mass discharge when exiting oxygen rifle, in this process according to pressure difference feelings in stove
Condition progressively adds wind, and furnace cylinder working state is recovered to thorough.
Gobbed up is handled using above method, will can thoroughly be discharged after the slag iron mixture scorification that solidified in cupola well,
Fast activating cupola well, rapid to recover furnace cylinder working state, the oxygen rifle that this method is used, which is arranged on tapping machine, uses mechanically actuated,
Be passed through during work compressed air cooling be unlikely to be burnt, compared with the conventional method, the present invention significantly shorten processing gobbed up when
Between, save substantial amounts of manpower and materials cost.
Claims (9)
1. a kind of method for handling gobbed up, it is characterised in that：This method comprises the following steps：
(1) blast furnace staying, stokehold dredging slag iron ditch carries out slag iron discharge preparation；
(2) iron mouthful tapping machine loads onto drilling rod, at drill bit preboring iron mouthful to red point；
(3) iron mouthful tapping machine changes oxygen rifle, and oxygen rifle is headed into iron mouth pore passage at red point；
(4) oxygen and compressed air are passed through to oxygen rifle；
(5) oxygen rifle is periodically moved back into tapping hole, discharges the slag iron mixture of scorification；
(6) when the slag iron volume of mixture of discharge reaches the 20%-40% of cupola well volume, furnace compound wind；
(7) operation of repeat step 5, and progressively add wind to recover furnace cylinder working state to thorough.
2. the method for processing gobbed up according to claim 1, it is characterised in that：Operation for iron mouthful is blast furnace institute
Have what iron mouthful was carried out simultaneously.
3. the method for processing gobbed up according to claim 1, it is characterised in that：The bit diameter of the step 2 is big
In or equal in step 3 oxygen rifle external diameter.
4. the method for the processing gobbed up according to claim 1,2 or 3, it is characterised in that：The oxygen rifle of the step 3 is also
It is tied with asbestos cord.
5. the oxygen rifle for the method for processing gobbed up described in claim 1-4 any one, it is characterised in that：Including including
Screw rod and gun body, screw rod are welded on gun body afterbody, and the gun body is provided with forced air cooled tube and oxygen lance, oxygen lance inside forced air cooled tube,
Forced air cooled tube is provided with cooling gas air inlet, and oxygen lance is provided with oxygen air inlet, and oxygen rifle head is additionally provided with the outlet of cooling gas and oxygen goes out
Mouthful.
6. oxygen rifle according to claim 5, it is characterised in that：The run of steel one that the length of the oxygen rifle is used with blast furnace
Cause.
7. oxygen rifle according to claim 5, it is characterised in that：External diameter >=60mm of the oxygen rifle.
8. oxygen rifle according to claim 5, it is characterised in that：The compressed air that gas uses pressure adjustable is cooled down, pressure is adjusted
Adjusting range is 0.3-0.8Mpa.
9. oxygen rifle according to claim 5, it is characterised in that：The adjustable range of oxygen pressure is 0.5-1.0Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334891.8A CN107254560A (en) | 2017-05-12 | 2017-05-12 | The processing blast furnace crucibe method freezed and the iron mouthful oxygen rifle used |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334891.8A CN107254560A (en) | 2017-05-12 | 2017-05-12 | The processing blast furnace crucibe method freezed and the iron mouthful oxygen rifle used |
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| CN107254560A true CN107254560A (en) | 2017-10-17 |
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| CN201710334891.8A Pending CN107254560A (en) | 2017-05-12 | 2017-05-12 | The processing blast furnace crucibe method freezed and the iron mouthful oxygen rifle used |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977601A (en) * | 2017-06-05 | 2018-12-11 | 上海梅山钢铁股份有限公司 | A kind of method of unchoking blast furnace tuyere and iron mouth |
| CN111607674A (en) * | 2020-06-29 | 2020-09-01 | 盐城市联鑫钢铁有限公司 | Method and device for promoting rapid temperature rise of blast furnace hearth |
| CN111809009A (en) * | 2020-06-13 | 2020-10-23 | 安徽长江钢铁股份有限公司 | Furnace condition quick recovery device for long-term unplanned damping down |
| CN111996317A (en) * | 2020-08-27 | 2020-11-27 | 山西太钢不锈钢股份有限公司 | Method for heating furnace hearth during furnace-closing period of blast furnace |
| CN112553392A (en) * | 2020-12-11 | 2021-03-26 | 北京首钢股份有限公司 | Portable iron notch burning device and using method thereof |
| CN113528735A (en) * | 2021-08-30 | 2021-10-22 | 新疆八一钢铁股份有限公司 | Iron mouth oxygen lance for Ou smelting furnace |
| CN113584248A (en) * | 2021-08-25 | 2021-11-02 | 新疆八一钢铁股份有限公司 | Iron notch oxygen lance system for Europe smelting furnace |
| CN114438268A (en) * | 2022-02-11 | 2022-05-06 | 山东钢铁集团永锋临港有限公司 | Boiling device and method for processing blast furnace hearth freezing |
| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
| CN115516113A (en) * | 2020-05-15 | 2022-12-23 | 杰富意钢铁株式会社 | Blast furnace operation method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977601A (en) * | 2017-06-05 | 2018-12-11 | 上海梅山钢铁股份有限公司 | A kind of method of unchoking blast furnace tuyere and iron mouth |
| CN115516113A (en) * | 2020-05-15 | 2022-12-23 | 杰富意钢铁株式会社 | Blast furnace operation method |
| CN115516113B (en) * | 2020-05-15 | 2024-05-14 | 杰富意钢铁株式会社 | Method for operating blast furnace |
| CN111809009A (en) * | 2020-06-13 | 2020-10-23 | 安徽长江钢铁股份有限公司 | Furnace condition quick recovery device for long-term unplanned damping down |
| CN111607674A (en) * | 2020-06-29 | 2020-09-01 | 盐城市联鑫钢铁有限公司 | Method and device for promoting rapid temperature rise of blast furnace hearth |
| CN111996317A (en) * | 2020-08-27 | 2020-11-27 | 山西太钢不锈钢股份有限公司 | Method for heating furnace hearth during furnace-closing period of blast furnace |
| CN112553392A (en) * | 2020-12-11 | 2021-03-26 | 北京首钢股份有限公司 | Portable iron notch burning device and using method thereof |
| CN113584248A (en) * | 2021-08-25 | 2021-11-02 | 新疆八一钢铁股份有限公司 | Iron notch oxygen lance system for Europe smelting furnace |
| CN113528735A (en) * | 2021-08-30 | 2021-10-22 | 新疆八一钢铁股份有限公司 | Iron mouth oxygen lance for Ou smelting furnace |
| CN114438268A (en) * | 2022-02-11 | 2022-05-06 | 山东钢铁集团永锋临港有限公司 | Boiling device and method for processing blast furnace hearth freezing |
| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
| CN115198044B (en) * | 2022-06-30 | 2023-09-22 | 南京钢铁股份有限公司 | Method for rapidly treating freezing of blast furnace hearth |
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Application publication date: 20171017 |
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