CN107008890A - Method for reducing burning loss of acid-soluble aluminum in tundish - Google Patents
Method for reducing burning loss of acid-soluble aluminum in tundish Download PDFInfo
- Publication number
- CN107008890A CN107008890A CN201610057495.0A CN201610057495A CN107008890A CN 107008890 A CN107008890 A CN 107008890A CN 201610057495 A CN201610057495 A CN 201610057495A CN 107008890 A CN107008890 A CN 107008890A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- long nozzle
- ladle
- tundish
- steel
- 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.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 229910052786 argon Inorganic materials 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 7
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 4
- 235000009566 rice Nutrition 0.000 claims abstract description 4
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- 238000005070 sampling Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims description 3
- 239000010903 husk Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 231100000350 mutagenesis Toxicity 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 238000007664 blowing Methods 0.000 abstract 1
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000003749 cleanliness Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention provides a method for reducing burning loss of acid-soluble aluminum in a tundish, which takes the maximum argon blowing amount without flooding of the molten steel liquid level around a long nozzle as an argon adjustment reference; if the manipulator vibrates to generate sudden change or the steel slag surface around the long nozzle suddenly rises in the last stage of pouring, the sliding plate is immediately closed; and (3) lowering the molten steel tank to the position where the lower edge of the long nozzle is 90-105 mm away from the surface of the molten steel, and then opening the sliding plate, wherein the whole large tank replacement operation is completed within 150 s. The covering agent is added into the tundish when the weight of the tundish reaches more than 35t, so that the surface of molten steel is not exposed, and 300-500 kg of the covering agent is added into a pouring area, a stopper rod hole and a temperature measurement sampling hole; then, adding 180-200 kg of water in each area after each tank is started to be poured; in the pouring process of the molten steel tank, the liquid level height of molten steel in the tundish reaches more than 1000mm, the long water gap enters the molten steel liquid level below 300mm, and carbonized rice hulls are used as auxiliary materials to prevent the covering agent on the surface of the molten steel from crusting. The invention can control the burning loss of acid-soluble aluminum in the tundish to be below 19ppm, effectively improve the purity of molten steel and improve the quality of casting blanks.
Description
Technical field
The invention belongs to process for making technical field, more particularly to a kind of method for reducing tundish dissolved aluminum scaling loss.
Background technology
At present, it is more complicated due to causing tundish Als scaling loss, therefore so far, both at home and abroad to Als scaling loss not yet
Ripe process system is formed, is caused in produced on-site practice, the fluctuation of Als scaling loss is larger always, directly affects the pure of molten steel
Cleanliness, causes strand inherent quality to decline.
The content of the invention
The present invention is intended to provide one kind can reduce tundish dissolved aluminum scaling loss, improve Molten Steel Cleanliness, improve the reduction of slab quality
The method of tundish dissolved aluminum scaling loss.
Therefore, the technical solution that the present invention is taken is：
A kind of method for reducing tundish dissolved aluminum scaling loss, it is characterised in that：
(1) tundish long nozzle Argon amount is controlled：Liquid steel level is controlled without the maximum Argon amount risen as adjustment using around long nozzle
Benchmark processed, prevents air-breathing or molten steel surface from seething；
(2) slag tapping volume of steel ladle is controlled：Ladle pours into a mould latter stage, if the vibrations of manipulator are produced around mutation or long nozzle
Slag surface rise suddenly, close slide gate nozzle immediately, and with the use of automatic slag check device, reduce ladle slag；
(3) ladle key points for operation are changed：
A. ladle is poured after panoramic table rotation, checks whether long nozzle inner chamber has residual steel, if residual steel needs to carry out clearly
Wash, especially long nozzle sealing table top is that long nozzle can not be with the presence of residual steel with the small mouth of a river contact plane of ladle, and ensures sealing station
Face if there is sealing table top breakage, then must change long nozzle without breakage；
B. when next ladle reaches cast position, prepare that long nozzle is installed, it is ensured that the small mouth of a river position of ladle and long nozzle
Aligned above and below position；
C. ladle is dropped into long nozzle lower edge away from opening ladle slide plate after 90~105mm of molten steel surface again, after molten steel flows down
Gradually increase slide plate aperture；
D. ensure that whole ladle of changing operates the completion in 150s；
(4) coverture adds control：Casting machine, which is opened, pours the first tank molten steel, and coverture reaches that more than 35t is added in tundish weight,
Addition be ensure molten steel surface without it is exposed be principle, pouring area, stopper hole and thermometric thief hole are uniformly added into 300~500kg；
Opened afterwards per tank steel and uniformly add 180~200kg each region is each after pouring；
(5) ladle is in casting process, and the liquid level of molten steel reaches more than 1000mm in tundish, and long nozzle enters steel
Below water level 300mm, in addition to ultra-low-carbon steel, remaining steel grade is aided with carbonization rice husk, it is to avoid molten steel surface coverture crusts.
Beneficial effects of the present invention are：
The present invention is effectively reduced tundish dissolved aluminum scaling loss, makes the control of tundish dissolved aluminum scaling loss in below 19ppm, so that pole
It is big to improve Molten Steel Cleanliness, improve slab quality.
Embodiment
Below by taking 60 tons of tundish as an example, the invention will be further described.
1st, tundish long nozzle Argon amount is controlled：Using around long nozzle liquid steel level without the maximum Argon amount risen as adjustment benchmark,
By the control of long nozzle Argon amount in 0.12~0.36Nm3/h。
2nd, slag tapping volume of steel ladle is controlled：The latter stage automatic slag inspection system of input is poured into a mould, while manipulator is manually held, when certainly
Dynamic slag inspection system alarm, or the slag surface that the vibrations of artificial feel manipulator are produced around mutation or long nozzle rise suddenly,
Steel water tank sliding gate is closed immediately.
3rd, big tank operation is changed：
A. ladle is poured after panoramic table rotation, checks whether long nozzle inner chamber has residual steel, if residual steel needs to be cleaned,
Especially long nozzle sealing table top (long nozzle and the small mouth of a river contact plane of ladle) can not be with the presence of residual steel, and ensures to seal table top
Without breakage, if there is sealing table top breakage, then long nozzle must be changed；
B. ladle is dropped into long nozzle lower edge away from opening ladle slide plate again after molten steel surface 100mm.
C. it is whole to change ladle operation completion in 120s.
4th, coverture adds control：Casting machine, which is opened, pours the first tank molten steel, and coverture reaches that 35t is added in tundish weight, stopper
Hole and thermometric thief hole are uniformly added into 400kg；Opened afterwards per tank steel and uniformly add 200kg each region is each after pouring.
5th, in normal casting process, the liquid level of molten steel should reach 1130mm in tundish, and long nozzle enters molten steel 600mm,
And it is aided with carbonization rice husk (except ultra-low-carbon steel), it is to avoid molten steel surface coverture crusts.
Claims (1)
1. a kind of method for reducing tundish dissolved aluminum scaling loss, it is characterised in that：
(1) tundish long nozzle Argon amount is controlled：With liquid steel level around long nozzle without the maximum Argon risen
Measure and control benchmark for adjustment, prevent air-breathing or molten steel surface from seething；
(2) slag tapping volume of steel ladle is controlled：Ladle pour into a mould latter stage, if manipulator vibrations produce mutation or
Slag surface around long nozzle rises suddenly, and slide gate nozzle is closed immediately, and with the use of automatic slag inspection
Device is looked into, ladle slag is reduced；
(3) ladle key points for operation are changed：
A. ladle is poured after panoramic table rotation, checks whether long nozzle inner chamber has residual steel, if residual steel
Need to be cleaned, especially long nozzle sealing table top is that long nozzle can not with the small mouth of a river contact plane of ladle
With the presence of residual steel, and ensure that sealing table top, without breakage, if there is sealing table top breakage, then must be changed
Long nozzle；
B. when next ladle reaches cast position, prepare that long nozzle is installed, it is ensured that the small mouth of a river position of ladle
Put and aligned with above and below long nozzle position；
C. ladle is dropped into long nozzle lower edge away from opening ladle slide plate again after 90~105mm of molten steel surface,
Molten steel gradually increases slide plate aperture after flowing down；
D. ensure that whole ladle of changing operates the completion in 150s；
(4) coverture adds control：Casting machine, which is opened, pours the first tank molten steel, and coverture reaches 35t in tundish weight
More than add, addition be ensure molten steel surface without it is exposed be principle, pouring area, stopper hole and thermometric sampling
Hole is uniformly added into 300~500kg；Opened afterwards per tank steel and uniformly add 180~200kg each region is each after pouring；
(5) ladle is in casting process, and the liquid level of molten steel reaches more than 1000mm in tundish,
Long nozzle enters below liquid steel level 300mm, and in addition to ultra-low-carbon steel, remaining steel grade is aided with carbonization rice husk,
Molten steel surface coverture is avoided to crust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057495.0A CN107008890A (en) | 2016-01-27 | 2016-01-27 | Method for reducing burning loss of acid-soluble aluminum in tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057495.0A CN107008890A (en) | 2016-01-27 | 2016-01-27 | Method for reducing burning loss of acid-soluble aluminum in tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107008890A true CN107008890A (en) | 2017-08-04 |
Family
ID=59438958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610057495.0A Pending CN107008890A (en) | 2016-01-27 | 2016-01-27 | Method for reducing burning loss of acid-soluble aluminum in tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107008890A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107685140A (en) * | 2017-09-08 | 2018-02-13 | 河钢股份有限公司承德分公司 | A kind of method for reducing tundish covering flux consumption |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53130235A (en) * | 1977-04-20 | 1978-11-14 | Foseco Trading Ag | Protector for slide gate |
| CN1400317A (en) * | 2002-09-04 | 2003-03-05 | 钢铁研究总院 | Method for treating and controlling acid-soluble aluminium in steel outside molten steel furnace |
| CN102397998A (en) * | 2010-09-08 | 2012-04-04 | 鞍钢股份有限公司 | Method for reducing secondary oxidation of molten steel |
| CN102586546A (en) * | 2012-03-05 | 2012-07-18 | 吉林建龙钢铁有限责任公司 | Process for preparing low-carbon low-silicon-aluminium killed steel |
| CN103469050A (en) * | 2013-09-22 | 2013-12-25 | 中天钢铁集团有限公司 | Aluminum-containing cold forging steel smelting process |
| CN103639383A (en) * | 2013-11-29 | 2014-03-19 | 攀钢集团研究院有限公司 | Pre-melting-type tundish covering agent and aluminum killed steel continuous casting method |
| JP2014109056A (en) * | 2012-11-30 | 2014-06-12 | Nippon Steel & Sumitomo Metal | High strength steel sheet excellent in extension flange property and bendability, method for smelting molten steel for the steel sheet |
-
2016
- 2016-01-27 CN CN201610057495.0A patent/CN107008890A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53130235A (en) * | 1977-04-20 | 1978-11-14 | Foseco Trading Ag | Protector for slide gate |
| CN1400317A (en) * | 2002-09-04 | 2003-03-05 | 钢铁研究总院 | Method for treating and controlling acid-soluble aluminium in steel outside molten steel furnace |
| CN102397998A (en) * | 2010-09-08 | 2012-04-04 | 鞍钢股份有限公司 | Method for reducing secondary oxidation of molten steel |
| CN102586546A (en) * | 2012-03-05 | 2012-07-18 | 吉林建龙钢铁有限责任公司 | Process for preparing low-carbon low-silicon-aluminium killed steel |
| JP2014109056A (en) * | 2012-11-30 | 2014-06-12 | Nippon Steel & Sumitomo Metal | High strength steel sheet excellent in extension flange property and bendability, method for smelting molten steel for the steel sheet |
| CN103469050A (en) * | 2013-09-22 | 2013-12-25 | 中天钢铁集团有限公司 | Aluminum-containing cold forging steel smelting process |
| CN103639383A (en) * | 2013-11-29 | 2014-03-19 | 攀钢集团研究院有限公司 | Pre-melting-type tundish covering agent and aluminum killed steel continuous casting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107685140A (en) * | 2017-09-08 | 2018-02-13 | 河钢股份有限公司承德分公司 | A kind of method for reducing tundish covering flux consumption |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170804 |