CN110735018A - Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization - Google Patents
Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization Download PDFInfo
- Publication number
- CN110735018A CN110735018A CN201911008825.7A CN201911008825A CN110735018A CN 110735018 A CN110735018 A CN 110735018A CN 201911008825 A CN201911008825 A CN 201911008825A CN 110735018 A CN110735018 A CN 110735018A
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- stirring
- carbon steel
- electrode
- refining
- 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
Images
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
- C21C7/064—Dephosphorising; Desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a method for producing low-carbon steel by rapid desulfurization of an LF furnace, which comprises the following steps of S1, performing weak stirring by using bottom-blown argon at the beginning of refining in the LF furnace, simultaneously performing electrode-reduction heating, and performing steps when the temperature of molten steel reaches 1550-1650 ℃, S2, performing strong stirring by using the bottom-blown argon, performing rapid desulfurization by adopting a weak-strong-weak-strong stirring mode, and preventing recarburization by adopting a reduced electrode heating-electrode-extraction desulfurization-reduced electrode heating-extraction desulfurization mode, wherein the mode does not change the original slag components, and the stirring intensity and the desulfurization thermodynamics are cooperatively matched to perform rapid desulfurization by changing the slag system, only the electrode lifting condition and the bottom-blowing parameter are changed, so that a good desulfurization effect is achieved, the recarburization is reduced to the maximum extent, the original slag components are not changed, the refining period of the LF furnace is shortened, and the product quality is improved.
Description
Technical Field
The invention belongs to the technical field of thick plate steelmaking, and particularly relates to a method for producing low-carbon steel by quickly desulfurizing LF furnaces.
Background
With the continuous progress of the steel industry technology, the continuous casting technology is continuously developed, the yield of high-quality steel is increased to meet the requirements of various types of markets, particularly the requirements of low-carbon and low-sulfur steel types are increased, for example, acid-resistant pipeline steel, steel plants which can produce finished products with the S content of less than 0.0015% in China are mostly realized by combining KR desulfurization and LF furnace desulfurization, KR desulfurization can remove the S content of molten iron to be below 0.0010%, the molten iron enters the LF furnace to be about 0.0050% as usual, low-S steel types can be stably produced by combining LF furnace desulfurization, when molten iron pretreatment is spray desulfurization, the effect is not as good as KR desulfurization, but the economy is high, the spray desulfurization can be removed to be as low as high as 0.0%, the difficulty of realizing 0.0010% after desulfurization is very high, the desulfurization time is long, the LF furnace is mainly used for desulfurization in the temperature rise, and the reaction is severe in the desulfurization process, so that the production of low-carbon and low-carbon content of the low-carbon steel is often caused by the LF furnace, the production of the low-carbon steel is very difficult, particularly, the requirement that.
In order to prevent recarburization in the process of rapid desulfurization, not change the components of original slag, shorten the refining period of an LF furnace and improve the product quality, methods for producing low-carbon steel by rapid desulfurization of the LF furnace are urgently needed, and therefore, methods for producing low-carbon steel by rapid desulfurization of the LF furnace are provided.
Disclosure of Invention
The invention aims to provide methods for producing low-carbon steel by quickly desulfurizing an LF (ladle furnace) so as to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme that the method for producing the low-carbon steel by quickly desulfurizing LF furnaces comprises the following steps:
s1, when refining in an LF furnace is started, bottom blowing argon is used for weak stirring, meanwhile, electrodes are reduced for heating, and when the temperature of molten steel reaches 1550-1650 ℃, the next steps are carried out;
s2, strongly stirring by using bottom-blown argon, simultaneously extracting an electrode for desulfurization, and carrying out the next steps when the stirring time is within the range of 6min-10 min;
s3, weakly stirring by using bottom blowing argon again, reducing the electrode to heat, and carrying out the next steps when the temperature of molten steel reaches more than 1600 ℃;
s4, strongly stirring the mixture again by using bottom-blown argon, and simultaneously extracting the electrodes for desulfurization, wherein the stirring time is 3-5 min;
and S5, finishing rapid desulfurization to produce low-carbon steel.
The method is preferably carried out in step , wherein before refining, magnesium-sprayed molten iron is adopted for pretreatment, the mass percent of S in molten steel is reduced to 0.0050-0.0080%, and the mass percent of C in molten steel tapped from a converter is 0.020-0.035%.
In step , it is preferable that in S1, when the LF furnace refining is started, 1000-1200kg of slag is added, and the flow rate of bottom-blown argon is controlled to be 300NL/min-500 NL/min.
In the present invention, it is preferable that in step , when strong stirring is performed using bottom-blown argon gas in S2, the flow rate of bottom-blown argon gas is controlled to 2500NL/min to 3500 NL/min.
In the step , it is preferable that 300kg to 500kg of slag is added before the bottom-blown argon gas is used for the weak stirring in S3, and the flow rate of the bottom-blown argon gas is controlled to 300NL/min to 500NL/min when the bottom-blown argon gas is used for the weak stirring.
In the present invention, it is preferable that in step , when strong stirring is performed using bottom-blown argon gas in S4, the flow rate of bottom-blown argon gas is controlled to 2500NL/min to 3500 NL/min.
In the present invention, it is preferable that in step , the state of argon bottom-blown is observed while stirring with bottom-blown argon.
It is preferable that the method further comprises detecting the temperature of the molten steel during the electrode-lowering heating and the electrode-raising desulfurization.
The invention is preferably carried out in the step , wherein refining slag is taken for inspection after times of heating.
It is preferable that the refining slag has good fluidity when the color is white slag.
Compared with the prior art, the method for producing the low-carbon steel by quickly desulfurizing the LF furnaces has the following advantages:
the method comprises the following steps of performing rapid desulfurization by adopting a weak-strong-weak-strong stirring mode, and preventing recarburization by adopting a reduced electrode heating-electrode extracting desulfurization-reduced electrode heating-electrode extracting desulfurization mode, wherein the mode does not change the components of the original slag, and the dynamic conditions of desulfurization are changed: according to the invention, the slag system is not changed, only the electrode lifting condition and bottom blowing parameters are changed, so that a good desulfurization effect is achieved, the recarburization is reduced to the maximum extent, the original slag components are not changed, the refining period of the LF furnace is shortened, and the product quality is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only partial embodiments , rather than complete embodiments.
Example
The invention provides a method for producing low-carbon steel by quickly desulfurizing LF furnaces shown in figure 1, which comprises the following steps:
s1, when refining in the LF furnace is started, bottom blowing argon is used for weak stirring, meanwhile, electrodes are reduced for heating, and when the temperature of molten steel reaches 1550 ℃, the next steps are carried out;
s2, strongly stirring by using bottom blowing argon, simultaneously extracting an electrode for desulfurization, and carrying out the next steps when the stirring time is 6 min;
s3, weakly stirring by using bottom blowing argon again, reducing the electrode to heat, and carrying out the next steps when the temperature of molten steel reaches more than 1600 ℃;
s4, strongly stirring the mixture by using bottom blowing argon again, and simultaneously extracting the electrodes for desulfurization, wherein the stirring time is 3 min;
and S5, finishing rapid desulfurization to produce low-carbon steel.
The invention specifically comprises the following steps: before the refining is started, magnesium-sprayed molten iron is pretreated, the mass percent of S in molten steel is reduced to 0.0050%, and the mass percent of C in molten steel tapped by a converter is 0.020%.
By adopting the scheme and adopting the magnesium-sprayed molten iron pretreatment, the mass percent of S in molten steel can be reduced to 0.0050%, and the mass percent of C in molten steel tapped from the converter is 0.020%, so that the molten steel can be refined at the later stage conveniently.
The invention specifically comprises the following steps: in S1, when LF furnace refining was started, 1000kg of slag was charged and the flow rate of bottom-blown argon gas was controlled to 300 NL/min.
By adopting the scheme, the flow of the bottom blowing argon can be determined so as to carry out weak stirring work.
The invention specifically comprises the following steps: in S2, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 2500NL/m i n.
By adopting the scheme, the flow of the bottom blowing argon can be determined so as to carry out strong stirring work and ensure the thermodynamic condition of desulfurization.
The invention specifically comprises the following steps: in S3, 300kg of slag was added before the bottom-blown argon gas was used for the low-intensity stirring, and when the bottom-blown argon gas was used for the low-intensity stirring, the flow rate of the bottom-blown argon gas was controlled to 300 NL/min.
By adopting the scheme, the flow of the bottom blowing argon can be determined so as to carry out weak stirring work.
The invention specifically comprises the following steps: in S4, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 2500 NL/min.
By adopting the scheme, the flow of the bottom blowing argon can be determined so as to carry out strong stirring work and ensure the thermodynamic condition of desulfurization.
The invention specifically comprises the following steps: while stirring with bottom-blown argon, the state of bottom-blown argon was observed.
By adopting the scheme, the normal operation of argon bottom blowing can be ensured, and the refining effect is ensured.
The invention specifically comprises the following steps: and detecting the temperature of the molten steel during electrode lowering heating and electrode lifting desulphurization.
By adopting the scheme, the electrode can be lowered and heated or the electrode can be lifted and desulfurized according to the temperature of the molten steel.
The invention is characterized in that refining slag is taken for inspection after times of heating.
By adopting the scheme, the state of the refining slag can be checked.
The invention specifically comprises the following steps: and observing the state of the refining slag in the refining process, wherein the white slag is in color, and the fluidity is good.
By adopting the scheme, the condition of the refining slag can be determined.
The working principle is as follows: firstly, when LF furnace refining starts, 1000kg of slag is added, the flow rate of bottom-blown argon is controlled to be 300NL/min, an electrode is lowered to heat up to 1550 ℃ so as to ensure the thermodynamic condition of desulfurization, the electrode is lifted, a ladle cover is lowered, the flow rate of bottom-blown argon is controlled to be 2500NL/min, strong stirring is carried out, the molten steel is ensured to be turned over greatly in a ladle, and good dynamic conditions are created for desulfurization; after strong stirring for 6min, wherein the content of S can reach below 20ppm, adding 300kg of slag again, controlling the flow of bottom-blown argon to be 300NL/min, lowering the electrode again, and heating to a temperature above 1600 ℃; and lifting the electrode and carrying out strong stirring desulfurization again for 3-5 min, wherein the flow of bottom-blown argon is controlled to be 2500NL/min, the content of S can be controlled to be below 0.0010 percent and can be as low as 0.0005 percent.
Example two
The invention also provides a method for producing low-carbon steel by quick desulfurization in the LF furnace shown in the figure 1, which is different from the embodiment and comprises the following steps:
s1, when refining in the LF furnace is started, bottom blowing argon is used for weak stirring, meanwhile, electrodes are lowered for heating, and when the temperature of molten steel reaches 1600 ℃, the next steps are carried out;
s2, strongly stirring by using bottom blowing argon, simultaneously extracting an electrode for desulfurization, and carrying out the next steps when the stirring time is within an 8min interval;
s3, weakly stirring by using bottom blowing argon again, reducing the electrode to heat, and carrying out the next steps when the temperature of molten steel reaches more than 1600 ℃;
s4, strongly stirring the mixture by using bottom blowing argon again, and simultaneously extracting the electrodes for desulfurization, wherein the stirring time is 4 min;
and S5, finishing rapid desulfurization to produce low-carbon steel.
Before the refining is started, preprocessing magnesium-sprayed molten iron is adopted, the mass percent of S in the molten steel is reduced to 0.00650%, and the mass percent of C in the molten steel tapped by the converter is 0.028%.
At S1, when LF furnace refining was started, 1100kg of slag was charged and the flow rate of bottom-blown argon gas was controlled to 400 NL/min.
In S2, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 3000 NL/min.
In S3, 400kg of slag was added before the bottom-blown argon gas was used for the low-intensity stirring, and when the bottom-blown argon gas was used for the low-intensity stirring, the flow rate of the bottom-blown argon gas was controlled to 400 NL/min.
In S4, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 3000 NL/min.
The working principle is as follows: firstly, when LF furnace refining starts, 1100kg of slag is added, the flow rate of bottom-blown argon is controlled to be 400NL/min, an electrode is lowered and heated to 1600 ℃ to ensure the thermodynamic condition of desulfurization, the electrode is lifted and a ladle cover is lowered, the flow rate of bottom-blown argon is controlled to be 3000NL/min for strong stirring, the molten steel is ensured to be turned over greatly in a ladle, and good dynamic conditions are created for desulfurization; after strong stirring for 8min, the content of S can reach below 20ppm, adding 400kg of slag again, controlling the flow of bottom-blown argon to be 400NL/min, lowering the electrode again, and heating to a temperature above 1600 ℃; and lifting the electrode, and carrying out strong stirring desulfurization again for 4min, wherein the flow rate of bottom-blown argon is controlled to be 3000NL/min, and the content of S can be controlled to be below 0.0010 percent and as low as 0.0005 percent. According to the invention, the slag system is not changed, only the lifting condition of the electrode and the bottom blowing parameters are changed, so that a good desulfurization effect is achieved, the recarburization is reduced to the maximum extent, the components of the original slag are not changed, the refining period of the LF furnace is shortened, and the product quality is improved.
EXAMPLE III
The invention also provides a method for producing low-carbon steel by quick desulfurization in the LF furnace shown in the figure 1, which is different from the embodiment and comprises the following steps:
s1, when refining in the LF furnace is started, bottom blowing argon is used for weak stirring, meanwhile, the electrode is lowered for heating, and when the temperature of molten steel reaches 1650 ℃, the next steps are carried out;
s2, strongly stirring by using bottom blowing argon, simultaneously extracting an electrode for desulfurization, and carrying out the next steps when the stirring time is within a 10min interval;
s3, weakly stirring by using bottom blowing argon again, reducing the electrode to heat, and carrying out the next steps when the temperature of molten steel reaches more than 1600 ℃;
s4, strongly stirring the mixture by using bottom blowing argon again, and simultaneously extracting the electrodes for desulfurization, wherein the stirring time is 5 min;
and S5, finishing rapid desulfurization to produce low-carbon steel.
Before the refining is started, preprocessing the molten iron by spraying magnesium, wherein the mass percent of S in the molten steel is reduced to 0.0080%, and the mass percent of C in the molten steel tapped from the converter is 0.035%.
In S1, when LF furnace refining was started, 1200kg of slag was charged and the flow rate of bottom-blown argon gas was controlled to 500 NL/min.
In S2, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 3500 NL/min.
In S3, 500kg of slag was added before the mixture was weakly stirred with bottom-blown argon gas, and when the mixture was weakly stirred with bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 500 NL/min.
In S4, when strong stirring was performed using bottom-blown argon gas, the flow rate of bottom-blown argon gas was controlled to 3500 NL/min.
The working principle is as follows: firstly, when LF furnace refining starts, 1200kg of slag is added, the flow rate of bottom-blown argon is controlled to be 500NL/min, the electrode is lowered and the temperature is raised to 1650 ℃ to ensure the thermodynamic condition of desulfurization, at the moment, the electrode is lifted and the ladle cover is lowered, the flow rate of bottom-blown argon is controlled to be 3500NL/min, strong stirring is carried out, the molten steel is ensured to be turned over greatly in a ladle, and good dynamic conditions are created for desulfurization; after strong stirring for 6min-10min, the S content can reach below 20ppm, 500kg of slag is added again, the flow of bottom-blown argon is controlled to be 500NL/min, the electrode is lowered again, and the temperature is raised to above 1600 ℃; and lifting the electrode, carrying out strong stirring desulfurization again for 5min, controlling the flow of bottom blowing argon to be 3500NL/min, and controlling the content of S to be below 0.0010 percent and as low as 0.0005 percent. According to the invention, the slag system is not changed, only the lifting condition of the electrode and the bottom blowing parameters are changed, so that a good desulfurization effect is achieved, the recarburization is reduced to the maximum extent, the components of the original slag are not changed, the refining period of the LF furnace is shortened, and the product quality is improved.
Example four
The invention also provides a method for producing low-carbon steel by quick desulfurization in the LF furnace shown in figure 1, which is different from the embodiment in that:
the pretreatment of the magnesium-sprayed molten iron is carried out to remove the S content to 0.0060 percent and the converter tapping C content is 0.030 percent; when the LF furnace is refined, 1000kg of slag is added, the flow of bottom-blown argon is controlled to be 300NL/min, the electrode is lowered and heated to 1600 ℃ to ensure the thermodynamic condition of desulfurization, the electrode is lifted and the ladle cover is lowered, the flow of bottom-blown argon is controlled to be 3000NL/min for strong stirring, the molten steel is ensured to be turned over greatly in the ladle, and a good dynamic condition is created for desulfurization; after strong stirring for 8min, the content of S is 0.0018%, 300kg of slag is added again, the flow of bottom-blown argon is controlled to be 300NL/min, the electrode is lowered again, and the temperature is raised to more than 1600 ℃; the electrode was lifted up and desulfurization was carried out again for 3min with vigorous stirring, and the flow rate of bottom-blown argon gas was controlled to 3000 NL/min. The final S content is below 0.008 percent, the C content is 0.038 percent, and the refining period is reduced to 41min from the original 48 min.
EXAMPLE five
The invention also provides a method for producing low-carbon steel by quick desulfurization in the LF furnace shown in figure 1, which is different from the embodiment in that:
the molten iron is sprayed with magnesium, the content of S is reduced to 0.0050 percent, and the content of C in converter tapping is 0.035 percent; when the LF furnace is refined, 1200kg of slag is added, the flow of bottom blowing argon is controlled to be 400NL/min, and the electrodes are reduced to heat up to 1600 ℃ so as to ensure the thermodynamic condition of desulfurization. At the moment, the electrode is lifted, the ladle cover is lowered, the flow of bottom-blown argon is controlled to be 3200NL/min, strong stirring is carried out, the molten steel is enabled to be turned over greatly in the ladle, and good dynamic conditions are created for desulfurization; after strong stirring for 9min, the content of S is 0.0013%, 300kg of slag is added again, the flow of bottom-blown argon is controlled to be 300NL/min, the electrode is lowered again, and the temperature is raised to more than 1600 ℃; the electrode was lifted up and desulfurization was carried out again for 3min with vigorous stirring, and the flow rate of bottom-blown argon gas was controlled to 3000 NL/min. The final S content is 0.006%, the C content is 0.042%, and the refining period is reduced to 43min from the original 52 min.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises the series of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While the preferred embodiments of the invention have been described, the invention is not limited thereto
It is therefore intended that the appended claims be interpreted as including the preferred embodiment as well as all such alterations and modifications as fall within the scope of the invention, since the basic inventive concepts will be readily apparent to those skilled in the art from .
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1, method for producing low-carbon steel by LF furnace fast desulfurization, which is characterized by comprising the following steps:
s1, when refining in an LF furnace is started, bottom blowing argon is used for weak stirring, meanwhile, electrodes are reduced for heating, and when the temperature of molten steel reaches 1550-1650 ℃, the next steps are carried out;
s2, strongly stirring by using bottom-blown argon, simultaneously extracting an electrode for desulfurization, and carrying out the next steps when the stirring time is within the range of 6min-10 min;
s3, weakly stirring by using bottom blowing argon again, reducing the electrode to heat, and carrying out the next steps when the temperature of molten steel reaches more than 1600 ℃;
s4, strongly stirring the mixture again by using bottom-blown argon, and simultaneously extracting the electrodes for desulfurization, wherein the stirring time is 3-5 min;
and S5, finishing rapid desulfurization to produce low-carbon steel.
2. The method for producing low-carbon steel by quickly desulfurizing kinds of LF furnaces, as recited in claim 1, wherein the mass percentage of S in molten steel is reduced to 0.0050% -0.0080% by pretreating with magnesium-sprayed molten iron before refining, and the mass percentage of C in molten steel tapped from a converter is 0.020% -0.035%.
3. The method for producing low-carbon steel by quickly desulfurizing kinds of LF furnaces as recited in claim 1, wherein in S1, at the beginning of LF furnace refining, 1000-1200kg slag charge is added, and the flow rate of bottom-blown argon gas is controlled to be 300NL/min-500 NL/min.
4. The method for producing low carbon steel by rapid desulfurization in kinds of LF furnaces, as recited in claim 1, wherein the amount of bottom-blown argon gas is controlled to be 2500NL/min to 3500NL/min when strong stirring is performed using bottom-blown argon gas in S2.
5. The method for producing low carbon steel by rapid desulfurization in kinds of LF furnaces, as recited in claim 1, wherein in S3, 300kg-500kg of slag was added before the mild agitation by bottom-blown argon gas was used, and the flow rate of bottom-blown argon gas was controlled to be 300NL/min-500NL/min when the mild agitation by bottom-blown argon gas was used.
6. The method for producing low carbon steel by rapid desulfurization in kinds of LF furnaces, as recited in claim 1, wherein the amount of bottom-blown argon gas is controlled to be 2500NL/min to 3500NL/min when strong stirring is performed using bottom-blown argon gas in S4.
7. The method for producing low carbon steel by rapidly desulfurizing kinds of LF furnaces in accordance with claim 1, wherein the state of argon bottom blowing is observed while stirring with bottom blowing argon.
8. The method for producing low-carbon steel by rapidly desulfurizing in kinds of LF furnaces, as recited in claim 1, wherein the temperature of molten steel is detected during the electrode-lowering heating and the electrode-raising desulfurizing.
9. The method for producing low-carbon steel by rapidly desulfurizing kinds of LF furnaces as claimed in claim 1, wherein the refining slag is taken out and examined after times of heating for refining.
10. The method for producing low carbon steel by rapidly desulfurizing kinds of LF furnaces, as recited in claim 1, wherein the state of the refining slag is observed during the refining process, and the fluidity is good when the color is white slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008825.7A CN110735018A (en) | 2019-10-22 | 2019-10-22 | Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008825.7A CN110735018A (en) | 2019-10-22 | 2019-10-22 | Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110735018A true CN110735018A (en) | 2020-01-31 |
Family
ID=69270854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911008825.7A Pending CN110735018A (en) | 2019-10-22 | 2019-10-22 | Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110735018A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343678A (en) * | 2008-08-20 | 2009-01-14 | 秦皇岛首秦金属材料有限公司 | Carbureting prevention processing method for quiet steel smelting LF stove |
| CN102002554A (en) * | 2009-08-28 | 2011-04-06 | 宝山钢铁股份有限公司 | Rapid desulfurization refining method for ladle furnace |
| CN103233096A (en) * | 2013-04-25 | 2013-08-07 | 武汉钢铁(集团)公司 | Low-carbon deep-desulfurization refining method of LF (ladle refining) furnace |
| CN105648147A (en) * | 2014-12-05 | 2016-06-08 | 重庆永林机械设备有限公司 | 30MnSi refining technology |
-
2019
- 2019-10-22 CN CN201911008825.7A patent/CN110735018A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343678A (en) * | 2008-08-20 | 2009-01-14 | 秦皇岛首秦金属材料有限公司 | Carbureting prevention processing method for quiet steel smelting LF stove |
| CN102002554A (en) * | 2009-08-28 | 2011-04-06 | 宝山钢铁股份有限公司 | Rapid desulfurization refining method for ladle furnace |
| CN103233096A (en) * | 2013-04-25 | 2013-08-07 | 武汉钢铁(集团)公司 | Low-carbon deep-desulfurization refining method of LF (ladle refining) furnace |
| CN105648147A (en) * | 2014-12-05 | 2016-06-08 | 重庆永林机械设备有限公司 | 30MnSi refining technology |
Non-Patent Citations (1)
| Title |
|---|
| 朱苗勇等: "《现代冶金工艺学-钢铁冶金卷（第2版）》", 31 December 2016, 冶金工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020093710A1 (en) | High-purity acid-resistant pipeline steel smelting process | |
| CN103937926B (en) | A kind of production method of ultra low-carbon steel ultra low oxygen content molten steel | |
| CN110093479B (en) | Bottom blowing CO2Method for smelting stainless steel | |
| CN103194564B (en) | Process for producing ultra-low phosphorus steel | |
| CN102943145B (en) | Converter smelting method of ultra-low phosphorus steel | |
| CN106435084B (en) | A kind of smelting process of Ultra Low-oxygen medium and high carbon steel | |
| CN100510112C (en) | Short-flow super low carbon steel ultra-low sulphur smelting control method | |
| CN107236894B (en) | A kind of method for making steel of low-sulfur, low titanium Aluminum steel | |
| CN102399942A (en) | Method of ultra-low-carbon steel dephosphorization outside furnace | |
| CN111621621B (en) | Control method of Mn in molten steel in RH vacuum treatment process | |
| CN104120352A (en) | 34CrMo4 gas cylinder steel and production method thereof | |
| CN105861781B (en) | A kind of method of refining of Si killed steel through ANS OB techniques | |
| CN107034421B (en) | Highly corrosion resistant high tensile reinforcement and its converter manufacturing method | |
| CN103361460A (en) | Production method for effectively controlling gas content in beam blank | |
| CN105063269B (en) | The Slag modification method of rail steel | |
| CN103160648B (en) | Method of smelting ultra-low carbon steel in LF (Ladle Furnace) | |
| CN110735018A (en) | Method for producing low-carbon steel by LF (ladle furnace) rapid desulfurization | |
| CN109593907B (en) | Method for smelting low-phosphorus steel | |
| KR101123035B1 (en) | Method and device for producing stainless steel without using a supply of electrical energy, based on pig-iron that has been pre-treated in a ddd installation | |
| CN101586174A (en) | Steel two-slag purifying method for ultra-cleaning welding | |
| CN113913580B (en) | Production method of ultralow-carbon low-aluminum structural molten steel | |
| CN103667875A (en) | Preparation method of low-carbon acid-resistant pipeline steel | |
| CN103966387A (en) | Method for making steel by adopting semisteel | |
| CN106834610A (en) | A kind of high-strength micro alloyed steel multistage combination control nitrogen method | |
| CN110484693B (en) | Low-cost RH decarburization dephosphorization method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200131 |
|
| RJ01 | Rejection of invention patent application after publication |