CN109022680A - Method for preventing first tank low-silicon aluminum killed steel from flocculating - Google Patents
Method for preventing first tank low-silicon aluminum killed steel from flocculating Download PDFInfo
- Publication number
- CN109022680A CN109022680A CN201710438820.2A CN201710438820A CN109022680A CN 109022680 A CN109022680 A CN 109022680A CN 201710438820 A CN201710438820 A CN 201710438820A CN 109022680 A CN109022680 A CN 109022680A
- Authority
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- China
- Prior art keywords
- calcium
- minutes
- tundish
- argon
- tank
- Prior art date
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Links
- 229910000655 Killed steel Inorganic materials 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003311 flocculating effect Effects 0.000 title abstract 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052786 argon Inorganic materials 0.000 claims abstract description 34
- 239000011575 calcium Substances 0.000 claims abstract description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000007670 refining Methods 0.000 claims abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003034 coal gas Substances 0.000 claims abstract description 6
- 238000012986 modification Methods 0.000 claims abstract description 6
- 230000004048 modification Effects 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000004033 diameter control Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 abstract description 3
- 206010039897 Sedation Diseases 0.000 abstract 2
- RGKMZNDDOBAZGW-UHFFFAOYSA-N aluminum calcium Chemical compound [Al].[Ca] RGKMZNDDOBAZGW-UHFFFAOYSA-N 0.000 abstract 2
- 230000036280 sedation Effects 0.000 abstract 2
- 239000011593 sulfur Substances 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 241000277275 Oncorhynchus mykiss Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
Abstract
the invention relates to a method for preventing a first-tank low-silicon aluminum killed steel from flocculating, which comprises the following steps of 1) after top slag modification is carried out in a refining L F furnace for 6-8 minutes in the middle-early stage, controlling the sulfur content in the steel to be below 0.008%, feeding a calcium silicon wire or an aluminum calcium wire for calcium treatment, controlling the calcium content to be 0.0008-0.0025%, avoiding aluminum adjustment in the later stage of refining, 2) after the calcium silicon wire or the aluminum calcium wire is fed, carrying out soft argon blowing for 10-15 minutes, controlling the diameter of the blowing-open area to be 0.1-0.3 m, carrying out sedation for 10-20 minutes, carrying out start pouring, carrying out soft argon blowing and sedation for 20-35 minutes, 3) after baking air in a tundish, controlling the proportion of coal gas to be 4.5-5: 1, 4) after the tundish is stopped baking, opening a tundish cover to blow argon into the tundish, filling argon into the tundish, pouring molten steel after baking fire in the tundish is poured until the first-tank is opened, and keeping the tundish cover to be fully poured until the first-tank is closed.
Description
Technical field
The present invention relates to metallurgical technology field more particularly to a kind of methods for preventing the low silicon aluminium killed steel wadding stream of first tank.
Background technique
Low silicon aluminium killed steel pour time first tank often occurred after the processing of LF furnace in packet wadding flow phenomenon.Without Calcium treatment,
First tank casting the middle and later periods often occurs wad a quilt with cotton flow phenomenon, often occur by Calcium treatment first tank open pour initial stage wad a quilt with cotton stream effectively cause
It flows or breaks and pour phenomenon.It is significant to the production direct motion of first tank steel and product quality raising to eliminate wadding stream.Need to design a set of new behaviour
Make method and solves the problems, such as that the low silicon aluminium killed steel of square billet pours time first tank production stability.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of methods for preventing the low silicon aluminium killed steel wadding stream of first tank, solve
The low silicon aluminium killed steel head tank wadding flow problem of square billet.
To achieve the above object, the present invention is implemented with the following technical solutions:
A method of preventing the low silicon aluminium killed steel wadding stream of first tank, comprising the following steps:
1) refining LF furnace is after mid-early stage carries out top slag modification in 6~8 minutes, by the sulphur mass percentage content control in steel
System 0.008% hereinafter, feeding silicon-calcium wire or aluminium calcium line carry out Calcium treatment, the control of calcium mass percentage content 0.0008%~
0.0025%, avoid refining later period tune aluminium；
2) feed after silicon-calcium wire or aluminium calcium line soft blow argon 10~15 minutes, blow open size diameter control 0.1~
0.3m, then calm open for 10~20 minutes are poured, soft blow argon and calm 20~35 minutes total times；
3) baking of tundish air: the burden control of coal gas is in 4.5~5:1；
4) it after tundish stops baking, opens pouring basket lid Argon air valve and is filled with argon gas into middle packet, toasted in middle packet
It closes after fire and pours argon gas within first 6 minutes full of middle packet to pouring time first tank ladle and open, and backpack cover Argon to first tank pours in keeping
Note terminates.
Compared with prior art, the beneficial effects of the present invention are:
After the method for the present invention application there is no the tank wadding stream because headed by caused by break and pour or fall flow phenomenon, pour time the wadding stream of head tank
Problem has obtained fine solution.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
A method of preventing the low silicon aluminium killed steel wadding stream of first tank, comprising the following steps:
1. LF furnace is refined after mid-early stage carries out top slag modification in 6~8 minutes, by the sulphur mass percentage content control in steel
System 0.008% hereinafter, feeding silicon-calcium wire or aluminium calcium line carry out Calcium treatment, the control of calcium mass percentage content 0.0008%~
0.0025%, avoid refining later period tune aluminium.The purpose of calcium zone of reasonableness is that the too low low melting point that cannot be formed of calcium is avoided to answer in control steel
Close object or the dystectic CaS wadding stream object of the excessively high formation of calcium content.
2. feed after silicon-calcium wire or aluminium calcium line soft blow argon 10~15 minutes, blow open size diameter control 0.1~
0.3m, then calm open for 10~20 minutes are poured, soft blow argon and calm 20~35 minutes total times.Control line feeding after soft argon blowing time and
The calm time is uniformly distributed in molten steel for calcium, and calcium aluminum oxide has sufficient time floating.
3. baking of tundish air: the burden control of coal gas in 4.5~5:1, reduce open pour before in oxygen superfluous in packet contain
Amount prevents oxygen baking, eliminates aluminium, calcium, sulphur phenomenon in excess oxygen abrupt oxidization head tank steel.
4. after tundish stops baking, opening pouring basket lid Argon air valve and being filled with argon gas into middle packet, toasted in middle packet
It closes after fire and pours argon gas within first 6 minutes full of middle packet to pouring time first tank ladle and open, and backpack cover Argon to first tank pours in keeping
Note terminates.The purpose of middle backpack cover Argon is oxygen in wrapping in discharge, avoids opening when pouring a large amount of abrupt oxidizations waddings in steel [Ca] or [Al]
Stream.
Embodiment 1
Prevent the operating method of low silicon aluminium killed steel SAE1005 wadding stream, comprising the following steps:
1. LF furnace is refined after mid-early stage carries out top slag modification in 6~8 minutes, by the sulphur mass percentage content control in steel
System 0.003% hereinafter, feeding silicon-calcium wire or aluminium calcium line carry out Calcium treatment, the control of calcium mass percentage content 0.0013%~
0.0023%, avoid refining later period tune aluminium.
2. feed after silicon-calcium wire or aluminium calcium line soft blow argon 13~15 minutes, blow open size diameter control 0.1~
0.3m, then calm open for 15~20 minutes are poured, soft blow argon and calm 28~35 minutes total times.
3. baking of tundish air: the proportion of coal gas is adjusted to 4.6:1, prevents oxygen baking.
4. after tundish stops baking, opening pouring basket lid Argon air valve, argon flow ensures to be full of in entire for 3 minutes
Between wrap space, and backpack cover Argon to first tank casting terminates in keeping.
Embodiment 2
Prevent the operating method of low silicon aluminium killed steel SWRCH22A wadding stream, comprising the following steps:
1. LF furnace is refined after mid-early stage carries out top slag modification in 6~8 minutes, by the sulphur mass percentage content control in steel
System 0.005% hereinafter, feeding silicon-calcium wire or aluminium calcium line carry out Calcium treatment, the control of calcium mass percentage content 0.0010%~
0.0020%, avoid refining later period tune aluminium.
2. feed after silicon-calcium wire or aluminium calcium line soft blow argon 10~13 minutes, blow open size diameter control 0.1~
0.3m, then calm open for 13~18 minutes are poured, soft blow argon and calm 23~31 minutes total times.
3. baking of tundish air: the proportion of coal gas is adjusted to 4.8:1, prevents oxygen baking.
4. after tundish stops baking, opening pouring basket lid Argon air valve, argon flow ensures to be full of in entire for 4 minutes
Between wrap space, and backpack cover Argon to first tank casting terminates in keeping.
Claims (1)
1. a kind of method for preventing from pouring the low silicon aluminium killed steel wadding stream of time head tank, which comprises the following steps:
1) refining LF furnace exists the sulphur mass percentage content control in steel after mid-early stage carries out top slag modification in 6~8 minutes
0.008% hereinafter, feeding silicon-calcium wire or aluminium calcium line carry out Calcium treatment, the control of calcium mass percentage content 0.0008%~
0.0025%, not in refining later period tune aluminium；
2) it feeds after silicon-calcium wire or aluminium calcium line soft blow argon 10~15 minutes, blows size diameter control open in 0.1~0.3m, then
Calmness is opened for 10~20 minutes pours, soft blow argon and calm 20~35 minutes total times；
3) baking of tundish air: the burden control of coal gas forbids oxygen to toast in 4.5~5:1；
4) it after tundish stops baking, opens pouring basket lid Argon air valve and is filled with argon gas into middle packet, close fire in the baking of middle packet
It pours argon gas within first 6 minutes full of middle packet to pouring time first tank ladle and open afterwards, and backpack cover Argon is poured to first tank and ties in keeping
Beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438820.2A CN109022680B (en) | 2017-06-12 | 2017-06-12 | Method for preventing first tank low-silicon aluminum killed steel from flocculating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438820.2A CN109022680B (en) | 2017-06-12 | 2017-06-12 | Method for preventing first tank low-silicon aluminum killed steel from flocculating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109022680A true CN109022680A (en) | 2018-12-18 |
| CN109022680B CN109022680B (en) | 2020-05-29 |
Family
ID=64628520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710438820.2A Active CN109022680B (en) | 2017-06-12 | 2017-06-12 | Method for preventing first tank low-silicon aluminum killed steel from flocculating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109022680B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137065A (en) * | 1994-10-18 | 1996-12-04 | 川崎制铁株式会社 | Smelting method of aluminium killed steel for steel sheet |
| US6053960A (en) * | 1997-12-30 | 2000-04-25 | Minerals Technologies, Inc. | Method of manufacture of cored wire for treating molten metal |
| JP2006183103A (en) * | 2004-12-28 | 2006-07-13 | Jfe Steel Kk | Method for melting low carbon aluminum-killed steel |
| CN102443680A (en) * | 2011-12-07 | 2012-05-09 | 鞍钢股份有限公司 | Method for preventing flocculation flow of first tank of aluminum killed steel produced by medium-thin slab continuous casting machine |
| CN102534118A (en) * | 2011-12-07 | 2012-07-04 | 鞍钢股份有限公司 | Method for reducing flocculation flow of low-silicon aluminum killed steel |
-
2017
- 2017-06-12 CN CN201710438820.2A patent/CN109022680B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137065A (en) * | 1994-10-18 | 1996-12-04 | 川崎制铁株式会社 | Smelting method of aluminium killed steel for steel sheet |
| US6053960A (en) * | 1997-12-30 | 2000-04-25 | Minerals Technologies, Inc. | Method of manufacture of cored wire for treating molten metal |
| JP2006183103A (en) * | 2004-12-28 | 2006-07-13 | Jfe Steel Kk | Method for melting low carbon aluminum-killed steel |
| CN102443680A (en) * | 2011-12-07 | 2012-05-09 | 鞍钢股份有限公司 | Method for preventing flocculation flow of first tank of aluminum killed steel produced by medium-thin slab continuous casting machine |
| CN102534118A (en) * | 2011-12-07 | 2012-07-04 | 鞍钢股份有限公司 | Method for reducing flocculation flow of low-silicon aluminum killed steel |
Non-Patent Citations (1)
| Title |
|---|
| 赵云珠: "《薄板低碳铝镇静钢生产工艺的优化》", 《本钢技术》 * |
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| Publication number | Publication date |
|---|---|
| CN109022680B (en) | 2020-05-29 |
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