CN104004883B - A kind of LF stoves are precisely controlled molten steel sulfur content method - Google Patents
A kind of LF stoves are precisely controlled molten steel sulfur content method Download PDFInfo
- Publication number
- CN104004883B CN104004883B CN201410258852.0A CN201410258852A CN104004883B CN 104004883 B CN104004883 B CN 104004883B CN 201410258852 A CN201410258852 A CN 201410258852A CN 104004883 B CN104004883 B CN 104004883B
- Authority
- CN
- China
- Prior art keywords
- sulphur
- finished product
- product target
- steel
- slag
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Molten steel sulfur content method is precisely controlled the present invention relates to a kind of LF stoves, molten steel is contained using ladle of the cleaning without slag bottom and steel bottom, steel-making tapping sulphur control mainly adjusts tapping sulphur in (finished product target sulphur 0.002%)~(finished product target sulphur+0.040%) in the whole LF stoves refining process control top basicity of slag of ladle.It is an advantage of the invention that：LF stoves are not taken under conditions of addition sulfide, and low cost is smelted into the control of steel grade finished product sulfur content in (finished product target sulphur 0.002%)~(finished product target sulphur+0.040%)；Production cost is reduced, production efficiency is improved.
Description
Technical field
The invention belongs to metallurgical technology field, more particularly to a kind of it is precisely controlled the behaviour that molten steel sulfur content is not less than a certain value
Make method.
Background technology
LF stoves (Ladle Furnace) are ladle refining furnace, are external refining equipments main during steel is produced.Smelting
During most of steel grades, it is desirable to which the sulfur content in steel is more low better, it is mainly in refining LF stoves and makes basic slag, with refining process
Sulfur content is gradually reduced in steel.Also some steel grades wish that the sulfur content in steel is both not higher than a certain value, less less than a certain value,
The target sulphur content of steel grade is controlled in narrower scope.This is difficult to control sulfur content stabilization in steel to exist using conventional refining route
Near a certain value.For sulfur content control is being not less than into a certain desired value, usually it is forced to take latter stage to feed ferrous sulfide line
Mode increase sulphur, cost is higher.
The content of the invention
To overcome the deficiencies in the prior art, molten steel sulfur content side is precisely controlled it is an object of the invention to provide a kind of LF stoves
Method, LF stoves are not taken under conditions of addition sulfide, realize that low cost is smelted and are precisely controlled steel grade finished product sulfur content.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of LF stoves are precisely controlled molten steel sulfur content method, and molten steel is contained using ladle of the cleaning without slag bottom and steel bottom,
Steel-making tapping sulphur control specifically includes following steps in (finished product target sulphur -0.002%)~(finished product target sulphur+0.040%)：
If 1) steel-making tapping sulphur=(finished product target sulphur -0.002%)~finished product target sulphur, the whole LF stoves of ladle are refined
Process top basicity of slag control range is：Push up basicity of slag≤1.0；
If 2) steel-making tapping sulphur ＞ finished products target sulphur~finished product target sulphur+0.002%, by the whole refining process top of ladle
Basicity of slag control range is：It is 1.0~1.2 to push up basicity of slag；
If 3) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), mid-early stage top basicity of slag control will be refined in ladle
Sulfur content in molten steel is removed to finished product target sulphur in 1.8-7.0, and in mid-early stage, while in mid-early stage by other members in molten steel
Plain composition adjustment is qualified, if into the initial sulphur of refining furnace scope for (finished product target sulphur+0.002%)~(finished product target sulphur+
0.010%), basicity of slag will be pushed up in ladle in the refining later stage and is adjusted to 1.2~1.5；If being into the initial sulphur scope of refining furnace
(finished product target sulphur+0.010%)~(finished product target sulphur+0.020%), will push up basicity of slag in the refining later stage and is adjusted in ladle
1.5~1.8；If into the initial sulphur ＞ of refining furnace (finished product target sulphur+0.020%), slag alkali will be pushed up in ladle in the refining later stage
Degree is adjusted to 1.8~2.2；
If 4) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), the refining later stage is according to step 3) adjustment top basicity of slag
Afterwards, maximum BOTTOM ARGON BLOWING amount ensures that molten steel face is exposed maximum no more than 1/6th of the gross area；
5) if steel grade needs refining latter stage feeding calcium line to be handled, the silicon-calcium wire of 1m/ tons of molten steel is often fed, before line feeding
Sulfur content be added to items mark sulphur+0.001%.
Compared with prior art, the beneficial effects of the invention are as follows：
LF stoves are not taken under conditions of addition sulfide, and low cost is smelted into the control of steel grade finished product sulfur content (into items
Mark sulphur -0.002%)~(finished product target sulphur+0.040%)；Production cost is reduced, production efficiency is improved.
Embodiment
The present invention is described in detail below, it should be noted that the implementation of the present invention is not limited to following embodiment party
Formula.
LF stoves are precisely controlled molten steel sulfur content method, and molten steel, steel-making are contained using ladle of the cleaning without slag bottom and steel bottom
Sulphur control tap in (finished product target sulphur -0.002%)~(finished product target sulphur+0.040%), following steps are specifically included：
If 1) steel-making tapping sulphur=(finished product target sulphur -0.002%)~finished product target sulphur, the whole LF stoves of ladle are refined
Process top basicity of slag control range is：Push up basicity of slag≤1.0；
If 2) steel-making tapping sulphur ＞ finished products target sulphur~finished product target sulphur+0.002%, by the whole refining process top of ladle
Basicity of slag control range is：It is 1.0~1.2 to push up basicity of slag；
If 3) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), mid-early stage top basicity of slag control will be refined in ladle
Sulfur content in molten steel is removed to finished product target sulphur in 1.8-7.0, and in mid-early stage, while in mid-early stage by other members in molten steel
Plain composition adjustment is qualified, if into the initial sulphur of refining furnace scope for (finished product target sulphur+0.002%)~(finished product target sulphur+
0.010%), basicity of slag will be pushed up in ladle in the refining later stage and is adjusted to 1.2~1.5；If being into the initial sulphur scope of refining furnace
(finished product target sulphur+0.010%)~(finished product target sulphur+0.020%), will push up basicity of slag in the refining later stage and is adjusted in ladle
1.5~1.8；If into the initial sulphur ＞ of refining furnace (finished product target sulphur+0.020%), slag alkali will be pushed up in ladle in the refining later stage
Degree is adjusted to 1.8~2.2；
If 4) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), the refining later stage is according to step 3) adjustment top basicity of slag
Afterwards, maximum BOTTOM ARGON BLOWING amount ensures that molten steel face is exposed maximum no more than 1/6th of the gross area；
5) if steel grade needs refining latter stage feeding calcium line to be handled, the silicon-calcium wire of 1m/ tons of molten steel is often fed, before line feeding
Sulfur content be added to items mark sulphur+0.001%.
Embodiment：
ER70S-G welding wire steels are produced, molten steel, steel-making tapping sulphur control are contained using ladle of the cleaning without slag bottom and steel bottom
In finished product target sulphur~(finished product target sulphur+0.010%), following steps are specifically included：
If 1) steel-making tapping sulphur is (finished product target sulphur -0.002%)~finished product target sulphur, the whole LF stoves of ladle are refined
The basicity of slag control of process top is in 0.8~＜ 1.0.
If 2) steel-making tapping sulphur ＞ finished product targets sulphur~(finished product target sulphur+0.002%), by the whole refining process of ladle
Basicity of slag control is pushed up 1.1.
If 3) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), mid-early stage top basicity of slag control will be refined in ladle
Sulfur content in molten steel is removed to finished product target sulphur in 1.8-4.0, and in mid-early stage, while in mid-early stage by other members in molten steel
Plain composition adjustment is qualified, if into the initial sulphur of refining furnace (finished product target sulphur+0.002%)~(finished product target sulphur+
0.010%), basicity of slag will be pushed up in ladle in the refining later stage and is adjusted to 1.3~1.4；If being into the initial sulphur scope of refining furnace
(finished product target sulphur+0.010%)~(finished product target sulphur+0.020%), will push up basicity of slag in the refining later stage and is adjusted in ladle
1.5~1.6；If into the initial sulphur ＞ of refining furnace (finished product target sulphur+0.020%), slag alkali will be pushed up in ladle in the refining later stage
Degree is adjusted to 1.8~2.0.
If 4) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), the refining later stage is according to step 3) adjustment top basicity of slag
Afterwards, maximum BOTTOM ARGON BLOWING amount ensures that molten steel face is exposed maximum no more than 1/8th of the gross area.
5) if steel grade needs refining latter stage feeding calcium line to be handled (process can reduce sulfur content), 1m/ tons are often fed
The silicon-calcium wire of molten steel, items mark sulphur+0.001% is added to by the sulfur content before line feeding.
The present invention realize LF stoves do not take addition sulfide under conditions of, by low cost smelt steel grade finished product sulfur content control
System is in (finished product target sulphur -0.002%)~(finished product target sulphur+0.040%)；Production cost is reduced, production efficiency is improved.
Claims (1)
1. a kind of LF stoves are precisely controlled molten steel sulfur content method, it is characterised in that use the clean ladle without slag bottom and steel bottom
Molten steel is contained, steel-making tapping sulphur control is specifically included in (finished product target sulphur -0.002%)~(finished product target sulphur+0.040%)
Following steps：
If 1) steel-making tapping sulphur=(finished product target sulphur -0.002%)~finished product target sulphur, by the whole LF stoves refining process of ladle
Pushing up basicity of slag control range is：Push up basicity of slag≤1.0；
If 2) steel-making tapping sulphur ＞ finished products target sulphur~finished product target sulphur+0.002%, by the whole refining process top slag alkali of ladle
Spending control range is：It is 1.0~1.2 to push up basicity of slag；
If 3) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), mid-early stage top basicity of slag control will be refined in ladle and is existed
1.8-7.0, and sulfur content in molten steel is removed to finished product target sulphur in mid-early stage, while in mid-early stage by other elements in molten steel
Composition adjustment is qualified, if into the initial sulphur of refining furnace scope for (finished product target sulphur+0.002%)~(finished product target sulphur+
0.010%), basicity of slag will be pushed up in ladle in the refining later stage and is adjusted to 1.2~1.5；If being into the initial sulphur scope of refining furnace
(finished product target sulphur+0.010%)~(finished product target sulphur+0.020%), will push up basicity of slag in the refining later stage and is adjusted in ladle
1.5~1.8；If into the initial sulphur ＞ of refining furnace (finished product target sulphur+0.020%), slag alkali will be pushed up in ladle in the refining later stage
Degree is adjusted to 1.8~2.2；
If 4) steel-making tapping sulphur ＞ (finished product target sulphur+0.002%), the refining later stage is according to step 3) adjust after the basicity of slag of top, most
Big BOTTOM ARGON BLOWING amount ensures that molten steel face is exposed maximum no more than 1/6th of the gross area；
5) if steel grade needs refining latter stage feeding calcium line to be handled, the silicon-calcium wire of 1m/ tons of molten steel is often fed, by the sulphur before line feeding
Content is added to items mark sulphur+0.001%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258852.0A CN104004883B (en) | 2014-06-12 | 2014-06-12 | A kind of LF stoves are precisely controlled molten steel sulfur content method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258852.0A CN104004883B (en) | 2014-06-12 | 2014-06-12 | A kind of LF stoves are precisely controlled molten steel sulfur content method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104004883A CN104004883A (en) | 2014-08-27 |
| CN104004883B true CN104004883B (en) | 2017-08-11 |
Family
ID=51365789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410258852.0A Active CN104004883B (en) | 2014-06-12 | 2014-06-12 | A kind of LF stoves are precisely controlled molten steel sulfur content method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104004883B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319132B (en) * | 2015-06-26 | 2018-02-27 | 鞍钢股份有限公司 | A kind of method of sulfur content in control steel |
| CN114941053A (en) * | 2022-05-20 | 2022-08-26 | 武汉钢铁有限公司 | Method for inhibiting resulfurization of molten steel tank by flushing acidic slag |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212633A (en) * | 1999-01-28 | 2000-08-02 | Kawasaki Steel Corp | Desulfurization of molten steel in ladle refining |
| CN102534120A (en) * | 2012-02-29 | 2012-07-04 | 首钢总公司 | Smelting process for production of super-low sulphur steel |
| CN103361542B (en) * | 2013-07-23 | 2015-03-25 | 湖南华菱涟源钢铁有限公司 | Wheel steel smelting process |
| CN103451364A (en) * | 2013-08-21 | 2013-12-18 | 番禺珠江钢管（连云港）有限公司 | LF (low-frequency) furnace deep-desulfurization method suitable for ultra-low sulfur pipeline steel |
-
2014
- 2014-06-12 CN CN201410258852.0A patent/CN104004883B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104004883A (en) | 2014-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103572001B (en) | Method for controlling alkalinity of ultra-low-sulfur steel LF (ladle furnace) slag | |
| CN102676727B (en) | Process for controlling smelting silicon content of low-silicon steel | |
| CN104611502B (en) | A kind of sulfur-bearing Series Gear steel smelting technique in aluminum | |
| CN104278130A (en) | Process of quickly regulating alkalinity of LF (ladle furnace) slag | |
| CN105420446A (en) | Light treatment smelting method for ladle furnace (LF) | |
| CN103215410B (en) | A kind of method improved containing Nb, Ti steel cleanness | |
| CN103397146A (en) | Production method of pipeline steel | |
| CN103614513A (en) | Calcium treatment method under special steelmaking process | |
| CN105420445A (en) | Method for smelting coarse-grained steel | |
| CN103060523B (en) | Smelting method for non-magnetic stainless steel | |
| CN104263880B (en) | A kind of stainless steel smelting method adapting to high phosphorus raw material | |
| CN103088244A (en) | Ferromanganese alloy and preparation method thereof | |
| CN104004883B (en) | A kind of LF stoves are precisely controlled molten steel sulfur content method | |
| CN104946852A (en) | Efficient desulfuration method for heavy rail steel | |
| CN103205522A (en) | Method for smelting plain carbon steel from semi-steel | |
| CN104046923B (en) | The X80 pipe line steel smelted under half steel condition and production technique thereof | |
| CN102876851B (en) | Method for improving calcium yield of RH vacuum furnace | |
| CN103911480A (en) | Deoxidation production technology for smelting H08MnA steel | |
| CN102051434B (en) | Method for smelting silicon steel | |
| CN106319132B (en) | A kind of method of sulfur content in control steel | |
| CN106498112B (en) | A kind of method for smelting welding wire steel H08B | |
| CN105506212B (en) | A kind of high alumina Multiphase Steel and its smelting process | |
| CN105112662A (en) | Method for preparing high-silicon silicon-manganese alloy | |
| CN204185511U (en) | A kind of stainless steel smelting device adapting to high phosphorus raw material | |
| CN106282473B (en) | A kind of anti-wadding stream method of small billet low-silicon steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |