CN108284210A - The method for improving continuous casting production quick change success rate - Google Patents
The method for improving continuous casting production quick change success rate Download PDFInfo
- Publication number
- CN108284210A CN108284210A CN201710860081.6A CN201710860081A CN108284210A CN 108284210 A CN108284210 A CN 108284210A CN 201710860081 A CN201710860081 A CN 201710860081A CN 108284210 A CN108284210 A CN 108284210A
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- Prior art keywords
- tundish
- spare
- continuous casting
- molten steel
- quick change
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of methods improving continuous casting production quick change success rate, have the following steps：(1) the ladle stand-by period for filling with molten steel is 5 10min, and it is 1,590 1600 °C that ladle, which reaches continuous casting platform temperature,；(2) work Metal in Tundish pulling rate dropped one grade every 20 seconds, and 8min is interior to be down to 0.3m/min by conticaster pulling rate；(3) work tundish liquid level is measured to start spare tundish car simultaneously to the other side with the work tundish car poured into a mould when work tundish stops pouring；(4) after spare tundish car reaches cast position, Fast Installation red heat submersed nozzle；(5) after spare tundish car is ready, after pouring into a mould 10 tons of molten steel, 150 200kg covertures are added to spare tundish；(6) when ladle is to 20 tons of molten steel of spare basket pouring, molten steel is injected into crystallizer；(7) spare centre is unwrapped pour after, carry out conticaster pulling rate driveaway operation.The present invention shortens the continuous casting production quick change time, improves continuous casting production quick change success rate, improves conticaster operating rate, reduces production cost, reduces the labor intensity of worker.
Description
Technical field
The invention belongs to steel-making continuous casting technical field, especially a kind of method improving continuous casting production quick change success rate.
Background technology
Conticaster is in order to reduce cost and improve operating rate, when tundish reaches service life, needs to carry out intermediate
Packet quick change operates, and in tundish quick change, Casting speed is off, and strand remains in spray and constantly continues the state of cooling,
If middle packet quick change overlong time, most probably since slab cooling is excessive, so that strand is hardened and cause stagnant base, make production disruption, very
It may extremely cause to freeze base accident.At present there is tundish quick change and operate in steel plant continuous casting machine in process of production, but for
The control range of each operation does not do specific description.
Invention content
The purpose of the present invention is to provide a kind of method improving continuous casting production quick change success rate, the present invention can shorten
The continuous casting production quick change time improves continuous casting production quick change success rate, improves conticaster operating rate, reduces production cost, drop
The labor intensity of low worker.
The object of the present invention is achieved like this：A method of improving continuous casting production quick change success rate, characterized in that
It has the following steps：
(1) during quick change continuous casting production, the ladle stand-by period for filling with molten steel is 5-10min, and ladle reaches continuous casting
Platform temperature is 1590-1600 °C；
(2) work Metal in Tundish pulling rate dropped one grade every 20 seconds, and conticaster pulling rate is down to 0.3m/min in 8min；
(3) work tundish liquid level is measured to start equipped with the standby of spare tundish when liquid level is in 300-500mm in packet
Prepare region with tundish car to heat exchange, at work between packet when stopping pouring, by spare tundish car and the work poured into a mould
Tundish car starts simultaneously to the other side；
(4) after spare tundish car reaches cast position, when Fast Installation red heat submersed nozzle, wherein submersed nozzle roasting
Between >=2h；Spare tundish car position is adjusted, submersed nozzle is made to be in crystallizer centre position, after being packed into blind plate, adjustment is standby
With tundish car height, make submersed nozzle bottom away from crystallizer 150-180mm suitable for reading；
(5) after spare tundish car is ready, ladle is opened, and after pouring into a mould 10 tons of molten steel, 150- is added to spare tundish
200kg covertures, measurement, which is opened, pours 1550 °C of tundish temperature ＞；
(6) when ladle is to 20 tons of molten steel of spare basket pouring, spare tundish start will to wrap in molten steel injection crystallizer；
(7) spare centre is unwrapped pour after, seedling-growing time control is in 80-120S, when molten steel is reached away from submersed nozzle in crystallizer
Bottom 115-125mm carries out conticaster pulling rate driveaway operation, and pulling rate is 0.3m/min after starting, and 0.3m/min pulling rates are kept
1min, then pulling rate increase to normal value 0.9m/min, stop being poured onto spare centre from work tundish and unwrap and pour, draw to crystallizer
Speed starting, time control is in 4-5min.
Blind plate is on the slideway of spare tundish car quick-changing mechanism.
Coverture is carbon-free covering agent, and ingredient is with SiO2Based on.
The present invention is directed to steel mill sheet billet continuous casting, pulling rate when tundish quick change, make strand receive spray constantly continue it is cold
But, it causes slab cooling to be excessively hardened, causes the production problem of stagnant base, the tundish quick change method provided is improved and changed into soon
The operating rate of power and conticaster, reduces hand labor intensity, and positive exemplary role is played for the energy-saving of enterprise.
Shorten the tundish quick change time as far as possible, strand is avoided to cause sub-cooled that stagnant base phenomenon occurs since cooling time is long, it is evident
Aobvious technological progress.
The principle of the present invention is that control molten steel is standby to be wrapped the time and reach continuous casting platform temperature by coordinating molten steel rhythm,
Control prompt drop time and control tundish liquid level；Spare middle packet is started to cast position, before tundish stops pouring, in spare
Between wrap and started simultaneously in opposite directions with the work tundish just poured into a mould, spare tundish reaches Fast Installation submersed nozzle behind cast position
And centering, notify big unwrap to pour after being packed into blind plate；The spare centre for stopping being poured onto replacement from work tundish unwraps and pours pulling rate, when total
Between control within 5-6min.
The present invention is suitable for same type conticaster, and the method that can improve conticaster heat exchange success rate keeps tundish hot
Swap time controlled within 5-6 minutes, reduced cost, improved operating rate.
Present invention reduces the continuous casting production quick change times, improve continuous casting production quick change success rate, improve continuous casting
Machine operation rate, reduces production cost, reduces the labor intensity of worker.
Specific implementation mode
The technical solution further illustrated the present invention below by specific implementation mode
Embodiment 1：
It is a kind of improve continuous casting production quick change success rate method include the following steps：
Step 1：During quick change continuous casting production, molten steel ladle stand-by period 5-10min is filled with, it is flat that ladle reaches continuous casting
1590-1600 DEG C of platform temperature；
Step 2：The Metal in Tundish pulling rate that works dropped one grade every 20 seconds, and conticaster pulling rate is down to 0.3m/min in 8min；
Step 3：Work tundish liquid level is measured, when the tundish liquid level that works is in 400mm, spare tundish car is started and arrives
Heat exchange prepares region, at work between packet when stopping pouring, by spare tundish car and the work tundish car poured into a mould to another
It starts simultaneously side；
Step 4：After spare tundish car reaches cast position, Fast Installation red heat submersed nozzle, wherein submersed nozzle dry
Roasting time >=2h；Spare tundish car position is adjusted, submersed nozzle is made to be in crystallizer centre position, after being packed into blind plate, is adjusted
It reorganizes and outfit with tundish car height, ensures submersed nozzle bottom away from crystallizer 170mm suitable for reading；
Step 5：After spare tundish car is ready, ladle is opened, and after pouring into a mould 10 tons of molten steel, 150- is added to tundish
200kg covertures, it is 1560 DEG C that measurement, which opens and pours tundish temperature,；
Step 6：When 20 ton hour of steel ladle pouring, spare tundish proceeds by cast, and spare Metal in Tundish is injected crystallizer；
Step 7：Centre is unwrapped pour after, seedling-growing time control is in 90-100s, when molten steel is reached away from submersed nozzle in crystallizer
Bottom 115-125mm, i.e. molten steel did not had submersed nozzle, carried out pulling rate driveaway operation, and pulling rate is 0.3m/min after starting,
0.3m/min pulling rates keep 1min, and then pulling rate adds to normal value 0.9m/min；Stop being poured onto spare tundish from work tundish
Starting, time control is in 4-5min.
Claims (3)
1. a kind of method improving continuous casting production quick change success rate, characterized in that have the following steps：
(1) during quick change continuous casting production, the ladle stand-by period for filling with molten steel is 5-10min, and ladle reaches continuous casting
Platform temperature is 1590-1600 °C；
(2) work Metal in Tundish pulling rate dropped one grade every 20 seconds, and conticaster pulling rate is down to 0.3m/min in 8min；
(3) work tundish liquid level is measured to start equipped with the standby of spare tundish when liquid level is in 300-500mm in packet
Prepare region with tundish car to heat exchange, at work between packet when stopping pouring, by spare tundish car and the work poured into a mould
Tundish car starts simultaneously to the other side；
(4) after spare tundish car reaches cast position, when Fast Installation red heat submersed nozzle, wherein submersed nozzle roasting
Between >=2h；Spare tundish car position is adjusted, submersed nozzle is made to be in crystallizer centre position, after being packed into blind plate, adjustment is standby
With tundish car height, make submersed nozzle bottom away from crystallizer 150-180mm suitable for reading；
(5) after spare tundish car is ready, ladle is opened, and after pouring into a mould 10 tons of molten steel, 150- is added to spare tundish
200kg covertures, measurement, which is opened, pours 1550 °C of tundish temperature ＞；
(6) when ladle is to 20 tons of molten steel of spare basket pouring, spare tundish start will to wrap in molten steel injection crystallizer；
(7) spare centre is unwrapped pour after, seedling-growing time control is in 80-120S, when molten steel is reached away from submersed nozzle in crystallizer
Bottom 115-125mm carries out conticaster pulling rate driveaway operation, and pulling rate is 0.3m/min after starting, and 0.3m/min pulling rates are kept
1min, then pulling rate increase to normal value 0.9m/min, stop being poured onto spare centre from work tundish and unwrap and pour, draw to crystallizer
Speed starting, time control is in 4-5min.
2. the method according to claim 1 for improving continuous casting production quick change success rate, it is characterized in that：Blind plate is mounted in spare
On the slideway of tundish car quick-changing mechanism.
3. the method according to claim 1 for improving continuous casting production quick change success rate, it is characterized in that：Coverture is carbon-free
Coverture, ingredient is with SiO2Based on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710860081.6A CN108284210A (en) | 2017-09-21 | 2017-09-21 | The method for improving continuous casting production quick change success rate |
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| CN201710860081.6A CN108284210A (en) | 2017-09-21 | 2017-09-21 | The method for improving continuous casting production quick change success rate |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817341A (en) * | 2018-07-18 | 2018-11-16 | 中天钢铁集团有限公司 | Conticaster reduces the method that pulling rate improves quick change success rate |
| CN109894587A (en) * | 2019-04-03 | 2019-06-18 | 南京钢铁股份有限公司 | A kind of generous specification slab CC tundish docking production technology |
| CN110640107A (en) * | 2019-10-17 | 2020-01-03 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from shrinking during quick changing of tundish of continuous casting machine |
| CN110653349A (en) * | 2019-07-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | One-key type quick ladle connecting device for tundish of continuous casting machine and using method |
| CN111112565A (en) * | 2020-01-15 | 2020-05-08 | 首钢京唐钢铁联合有限责任公司 | Method for quickly replacing peritectic steel tundish |
| CN112191837A (en) * | 2020-10-12 | 2021-01-08 | 马鞍山钢铁股份有限公司 | Control method for slab continuous casting silicon steel quick-change tundish process |
| CN112823966A (en) * | 2019-11-20 | 2021-05-21 | 上海梅山钢铁股份有限公司 | Method for quickly and automatically replacing continuous casting tundish |
| CN113579184A (en) * | 2021-07-28 | 2021-11-02 | 北京首钢股份有限公司 | Slab tundish casting method and device |
| CN114406223A (en) * | 2022-01-29 | 2022-04-29 | 新疆八一钢铁股份有限公司 | Method for replacing tundish of iron and steel enterprise without shutdown in continuous casting |
| CN114472835A (en) * | 2022-01-28 | 2022-05-13 | 新疆八一钢铁股份有限公司 | Heat exchange operation method for wide and thick plate blank continuous casting tundish |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006150428A (en) * | 2004-11-30 | 2006-06-15 | Kobe Steel Ltd | Consecutive continuous casting method for steels different in kind |
| CN103464699A (en) * | 2013-08-13 | 2013-12-25 | 新疆八一钢铁股份有限公司 | Method for increasing success rate of heat exchange of continuous casting machine tundish |
| CN105987598A (en) * | 2015-01-29 | 2016-10-05 | 边仁杰 | Regenerative furnace pump |
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2017
- 2017-09-21 CN CN201710860081.6A patent/CN108284210A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150428A (en) * | 2004-11-30 | 2006-06-15 | Kobe Steel Ltd | Consecutive continuous casting method for steels different in kind |
| CN103464699A (en) * | 2013-08-13 | 2013-12-25 | 新疆八一钢铁股份有限公司 | Method for increasing success rate of heat exchange of continuous casting machine tundish |
| CN105987598A (en) * | 2015-01-29 | 2016-10-05 | 边仁杰 | Regenerative furnace pump |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817341A (en) * | 2018-07-18 | 2018-11-16 | 中天钢铁集团有限公司 | Conticaster reduces the method that pulling rate improves quick change success rate |
| CN109894587A (en) * | 2019-04-03 | 2019-06-18 | 南京钢铁股份有限公司 | A kind of generous specification slab CC tundish docking production technology |
| CN110653349A (en) * | 2019-07-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | One-key type quick ladle connecting device for tundish of continuous casting machine and using method |
| CN110640107A (en) * | 2019-10-17 | 2020-01-03 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from shrinking during quick changing of tundish of continuous casting machine |
| CN110640107B (en) * | 2019-10-17 | 2021-06-01 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from shrinking during quick changing of tundish of continuous casting machine |
| CN112823966A (en) * | 2019-11-20 | 2021-05-21 | 上海梅山钢铁股份有限公司 | Method for quickly and automatically replacing continuous casting tundish |
| CN111112565A (en) * | 2020-01-15 | 2020-05-08 | 首钢京唐钢铁联合有限责任公司 | Method for quickly replacing peritectic steel tundish |
| CN111112565B (en) * | 2020-01-15 | 2021-11-05 | 首钢京唐钢铁联合有限责任公司 | Method for quickly replacing peritectic steel tundish |
| CN112191837A (en) * | 2020-10-12 | 2021-01-08 | 马鞍山钢铁股份有限公司 | Control method for slab continuous casting silicon steel quick-change tundish process |
| CN113579184A (en) * | 2021-07-28 | 2021-11-02 | 北京首钢股份有限公司 | Slab tundish casting method and device |
| CN114472835A (en) * | 2022-01-28 | 2022-05-13 | 新疆八一钢铁股份有限公司 | Heat exchange operation method for wide and thick plate blank continuous casting tundish |
| CN114406223A (en) * | 2022-01-29 | 2022-04-29 | 新疆八一钢铁股份有限公司 | Method for replacing tundish of iron and steel enterprise without shutdown in continuous casting |
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Application publication date: 20180717 |
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