CN106399641A - RH rapid decarbonization and molten steel temperature drop reduction method - Google Patents
RH rapid decarbonization and molten steel temperature drop reduction method Download PDFInfo
- Publication number
- CN106399641A CN106399641A CN201610973985.5A CN201610973985A CN106399641A CN 106399641 A CN106399641 A CN 106399641A CN 201610973985 A CN201610973985 A CN 201610973985A CN 106399641 A CN106399641 A CN 106399641A
- Authority
- CN
- China
- Prior art keywords
- decarburization
- temperature drop
- content
- station
- oxygen blast
- 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.)
- Granted
Links
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
- C21C7/10—Handling in a vacuum
-
- 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
- C21C7/068—Decarburising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses an RH rapid decarbonization and molten steel temperature drop reduction method and belongs to the technical field of ferrous metallurgy. The RH rapid decarbonization and molten steel temperature drop reduction method comprises the steps that high carbon drawing operation is carried out through a converter smelting end point; after steel tapping of a converter, RH refining is started, and oxygen blowing is started to conduct forced decarbonization at the early stage of RH refining; after completion of forced decarbonization, oxygen blowing is continued at the secondary combustion stage, the oxygen blowing flow at the secondary combustion stage is distributed in a stepped mode according to different RH completion C contents, and temperature drop compensation is conducted through heat release of CO gas generated from combustion. By means of the method, the carbon content can be removed to 0.0015% or below, and meanwhile, the temperature from RH completion to RH heat release temperature drop is controlled within 15 DEG C.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, particularly to the side of a kind of quick decarburization of RH and minimizing temperature drop
Method.
Background technology
With the fast development of auto industry, current low-carbon (LC) and ultralow carbon cold-rolled steel plate demand increase year by year.Domestic smelting
The main technique that low-carbon (LC) and ultralow carbon cold-rolled steel plate are taken is Converter vacuum circulation refining furnace refine (RH refine) continuous casting, with
As a example ultra-low-carbon steel, RH refinery practice great majority adopt nature decarbonization process, and [C] is removed to 15～below 20ppm, and decarburization is tied
Al, Ti alloying is added after bundle.Domestic steel mill is during smelting low carbon and ultralow carbon cold-rolled steel plate at present, and generally existing and turned
, the problems such as cycle length of standing, RH temperature drop are big, these problems directly result in Tapping Temperature of Bof height and then make for stove outlet temperature height, RH
Obtain converter terminal dissolved oxygen and slag TFe content is high, control for follow-up cleanliness factor and be negatively affected.And between these problems
There is the logical relation of inherence again：RH directly results in RH refining process temperature drop greatly in station cycle length, and RH refining process is big
Temperature drop will may require that high converter terminal temperature is made up.And the important step affecting RH in the station cycle is RH refine
The decarbonization rate of journey, decarbonization rate height means that cycle is short, RH temperature drop are few, and final converter terminal temperature is low.How fast using RH
Fast decarburization reduces temperature drop simultaneously and is becoming the significant challenge that RH refine faces.
Content of the invention
It is an object of the invention to provide a kind of quick decarburization of RH and the method reducing temperature drop, solve prior art
Present in RH refining process decarbonization rate is low, RH temperature drop is big technical problem.
For solving above-mentioned technical problem, the invention provides following technical scheme：
A kind of quick decarburization of RH and the method reducing temperature drop, including：
Converter smelting endpoint carries out catch carbon practice；
RH refine is entered, RH refine early stage starts oxygen blast and carries out forcing decarburization after converter tapping；
After forcing decarburization to terminate, the entrance second-time burning stage proceeds oxygen blast, the oxygen blast flow root in second-time burning stage
Assume ladder distribution according to RH C content difference of arriving at a station, the CO gas heat release that generates by burning carries out temperature drop compensation.
Further, described converter smelting endpoint carries out catch carbon practice, including：Control endpoint carbon content of converter 0.06
～0.08%.
Further, described pressure decarburization and two stages of second-time burning adopt identical rifle position.
Further, described RH refine early stage start oxygen blast carry out force decarburization be specially：When RH vacuum reaches
Oxygen blast is proceeded by during 180mbar.
Further, described blowing oxygen quantity and the RH forcing decarburization arrives at a station C content and the RH O content that arrives at a station meets following relation：Y
=-0.15*M+2000*N+29；
Wherein, Y represents blowing oxygen quantity, m3；M represents RH and arrives at a station O content, ppm；N represents RH and arrives at a station the weight/mass percentage composition of C.
Further, the oxygen blast flow in described second-time burning stage according to RH arrive at a station C content difference present (900～
1200)-(500～800)-(200～500)-(0～300) Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
Further, RH is carried out by methods described and process 15min, RH terminates C content and arrives at a station for less than 0.0015%, RH
Break air temperature fall to RH to control within 15 DEG C.
Further, methods described be applied to smelt final finished carbon content mass fraction require below 0.0060%
Steel grade.
Further, methods described is applied to 100-300 ton RH refining furnace.
The one or more technical schemes providing in the embodiment of the present invention, at least have the following technical effect that or advantage：
The quick decarburization of RH providing in the embodiment of the present invention and the method reducing temperature drop, by taking converter smelting eventually
Point carries out catch carbon practice, obtains higher endpoint carbon content thus forcing decarburization to create conditions for RH；Enter after converter tapping
RH refine, RH refine early stage starts oxygen blast and carries out forcing decarburization, and oxygen decarburization opportunity is shifted to an earlier date thus reaching the quick decarburization of early stage
Purpose；Force after decarburization terminates, entering the second-time burning stage proceeds oxygen blast, the oxygen blast flow in second-time burning stage according to
RH C content difference of arriving at a station assumes ladder distribution, and the CO gas heat release that generates by burning carries out temperature drop compensation.So, solve
The technical problem that present in prior art RH refining process decarbonization rate is low, RH temperature drop is big, so obtain RH can be
Carbon content is taken off to less than 0.0015% in 15min, RH arrives at a station and breaks air temperature fall to RH and control the technology within 15 DEG C to imitate simultaneously
Really.
Specific embodiment
The embodiment of the present invention passes through the method providing a kind of quick decarburization of RH and reducing temperature drop, solves prior art
Present in RH refining process decarbonization rate is low, RH temperature drop is big technical problem；RH decarbonization rate can be effectively improved, drop simultaneously
Low RH temperature losses of the process.
For solving above-mentioned technical problem, embodiment of the present invention general thought is as follows：
A kind of quick decarburization of RH and the method reducing temperature drop are provided, including：
Converter smelting endpoint carries out catch carbon practice；
RH refine is entered, RH refine early stage starts oxygen blast and carries out forcing decarburization after converter tapping；
After forcing decarburization to terminate, the entrance second-time burning stage proceeds oxygen blast, the oxygen blast flow root in second-time burning stage
Assume ladder distribution according to RH C content difference of arriving at a station, the CO gas heat release that generates by burning carries out temperature drop compensation.
By the above as can be seen that carrying out catch carbon practice by taking converter smelting endpoint, obtain higher end
Point carbon content is thus force decarburization to create conditions for RH；RH refine is entered, RH refine early stage starts oxygen blast and carries out after converter tapping
Force decarburization, oxygen decarburization opportunity is shifted to an earlier date thus reaching the purpose of the quick decarburization of early stage；After forcing decarburization to terminate, enter secondary
Combustion phases proceeds oxygen blast, and the oxygen blast flow in second-time burning stage assumes ladder distribution according to RH C content difference of arriving at a station, and leads to
Cross the CO gas heat release that burning generates carrying out temperature drop compensation.So, solve RH refining process present in prior art to take off
The technical problem that carbon speed is low, RH temperature drop is big.
Using said method, following technique effect can be obtained：RH can take off carbon content to 0.0015% in 15min
Hereinafter, simultaneously RH arrive at a station to RH break air temperature fall control within 15 DEG C.
In order to be better understood from technique scheme, below by specific embodiment, technical solution of the present invention is done detailed
Illustrate it should be understood that the specific features in the embodiment of the present invention and embodiment are to technical solution of the present invention specifically
Bright, rather than the restriction to technical solution of the present invention, the skill in the case of not conflicting, in the embodiment of the present invention and embodiment
Art feature can be combined with each other.
The embodiment of the present invention provides a kind of quick decarburization of RH and the method reducing temperature drop, is mainly used in smelting final one-tenth
The mass fraction of product carbon content requires steel grade below 0.0060% it is adaptable to 100-300 ton RH refining furnace, methods described bag
Include：
Converter smelting endpoint carries out catch carbon practice；
RH refine is entered, RH refine early stage starts oxygen blast and carries out forcing decarburization after converter tapping；
After forcing decarburization to terminate, the entrance second-time burning stage proceeds oxygen blast, the oxygen blast flow root in second-time burning stage
Assume ladder distribution according to RH C content difference of arriving at a station, the CO gas heat release that generates by burning carries out temperature drop compensation.
In the embodiment of the present invention, converter smelting endpoint carries out catch carbon practice, including：Endpoint carbon content of converter is controlled to exist
0.06～0.08%.
In the embodiment of the present invention, RH oxygen blast process is divided into pressure decarburization and two stages of second-time burning, and adopts identical
Rifle position.
In the embodiment of the present invention, RH refine early stage starts oxygen blast and carries out forcing decarburization to be specially：When RH vacuum reaches
Oxygen blast is proceeded by during 180mbar.Select vacuum to reach to proceed by oxygen blast during 180mbar and be because when vacuum is excessive
Molten steel fails fully to circulate, and will avoid the quick decarburizing phase of early stage when vacuum is too small it is impossible to reach quick decarburization
Effect.
In the embodiment of the present invention, force blowing oxygen quantity and the RH of decarburization to arrive at a station C content and the RH O content that arrives at a station meets such as ShiShimonoseki
System：Y=-0.15*M+2000*N+29；
Wherein, Y represents blowing oxygen quantity, m3；M represents RH and arrives at a station O content, ppm；N represents the arrive at a station percent mass of C of RH and contains
Amount, %.
Decarburization blowing oxygen quantity is forced to be to terminate oxygen content designed by 190ppm according to decarburization, and in view of dissolved oxygen in molten steel
Increase and finally determine, ensure that the blowing oxygen quantity needed for carbon burning, thus abundant decarburization.
In the embodiment of the present invention, the oxygen blast flow in second-time burning stage according to RH arrive at a station C content difference present (900～
1200)-(500～800)-(200～500)-(0～300) Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
The oxygen blast uninterrupted in each stage is different and different according to RH C content of arriving at a station, when RH arrive at a station C content high when, right
The CO amount height that should produce is it is therefore desirable to bigger oxygen blast flow CO is burnt.For example：When RH C content of arriving at a station is
When 0.04%, now second-time burning oxygen blast flow is generally according to 900-500-200-60Nm3The stepped distribution of/h；When RH arrives at a station C
When content is 0.06%, now second-time burning oxygen blast flow is generally according to 1200-800-500-300Nm3The stepped distribution of/h.Blow
The oxygen time, mainly according to waste gas curve, needs the time of burning CO to be about 160s, oxygen blast flow is stepped according to four-stage
Distribution, each phases-time is 40s.Overlong time, leads to ladder few, bad with waste gas curves, and the time is too short, in reality
In production, oxygen rifle operation is not easily controlled.
By the above as can be seen that the embodiment of the present invention is primarily present with the difference of traditional RH decarbonizing process with lower section
Face：1) converter smelting endpoint carries out catch carbon practice, and terminal C content controls 0.06～0.08%, and the traditional handicraft that compares is eventually
Point carbon content is high, is that RH forces decarburization to create conditions；2) RH refining process is divided into pressure decarburization and two ranks of second-time burning
Section, RH refine early stage vacuum reaches and starts oxygen blast during 180mbar, RH pressure oxygen decarburization opportunity is shifted to an earlier date, makes full use of RH
Force the feature that decarburization early stage oxygen content is the rate controlling link of decarburization, carry out quick decarburization；3) decarburization oxygen blast is forced to terminate laggard
Enter the second-time burning stage, oxygen blast is proceeded using step's flux according to RH C content of arriving at a station, with the follow-up CO producing putting of burning
Heat is to compensate temperature drop.
Using said method, following technique effect can be obtained：RH can take off carbon content to 0.0015% in 15min
Hereinafter, simultaneously RH arrive at a station to RH break air temperature fall control within 15 DEG C.
For a more detailed description to the present invention by the following examples.These embodiments are only optimal embodiment party to the present invention
The description of formula, does not have any restriction to the scope of the present invention.
Following examples carry out refine using 210 tons of RH refining furnaces.
Embodiment 1
1) converter smelting endpoint carries out catch carbon practice, and endpoint carbon content of converter 0.06%, is that RH forces decarburization to be created
Condition.
2) RH oxygen blast process is divided into pressure decarburization and two stages of second-time burning, all using 6.6m rifle position.
3) RH arrives at a station 1624 DEG C of temperature, and C content of arriving at a station is 0.04%, and the O content that arrives at a station is 400ppm, when RH vacuum reaches
Start oxygen blast, oxygen blast flow is 2000Nm during 180mbar3/ h, blowing oxygen quantity is 49m3.
4) decarburization is forced to enter the second-time burning stage after terminating, second-time burning is divided into 4 stages, and oxygen blast flow is according to 900-
500-200-100Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
5) RH end temp is 1610 DEG C, and during RH process time 15min, it is 0.0012% that RH terminates C content.
Embodiment 2
1) converter smelting endpoint carries out catch carbon practice, and endpoint carbon content of converter is 0.07%, is that RH forces decarburization to be created
Condition.
2) RH oxygen blast process is divided into pressure decarburization and two stages of second-time burning, all using 6.6m rifle position.
3) RH arrives at a station 1621 DEG C of temperature, and C content of arriving at a station is 0.05%, and the O content that arrives at a station is 400ppm, when RH vacuum reaches
Start oxygen blast, oxygen blast flow is 2000Nm during 180mbar3/ h, blowing oxygen quantity is 69m3.
4) force decarburization to enter the second-time burning stage after terminating, second-time burning is divided into 4 stages, oxygen blast flow according to
1000-600-300-200Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
5) RH end temp is 1608 DEG C, and during RH process time 15min, it is 0.0013% that RH terminates C content.
Embodiment 3
1) converter smelting endpoint carries out catch carbon practice, and endpoint carbon content of converter is 0.08%, is that RH forces decarburization to be created
Condition.
2) RH oxygen blast process is divided into pressure decarburization and two stages of second-time burning, all using 6.6m rifle position.
3) RH arrives at a station temperature for 1619 DEG C, and C content of arriving at a station is 0.06%, and the O content that arrives at a station is 400ppm, when RH vacuum reaches
Start oxygen blast, oxygen blast flow is 2000Nm during to 180mbar3/ h, blowing oxygen quantity is 88m3.
4) force decarburization to enter the second-time burning stage after terminating, second-time burning is divided into 4 stages, oxygen blast flow according to
1100-700-400-300Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
5) RH end temp is 1609 DEG C, and during RH process time 15min, it is 0.0015% that RH terminates C content.
The one or more technical schemes providing in the embodiment of the present invention, at least have the following technical effect that or advantage：
The quick decarburization of RH providing in the embodiment of the present invention and the method reducing temperature drop, by taking converter smelting eventually
Point carries out catch carbon practice, obtains higher endpoint carbon content thus forcing decarburization to create conditions for RH；Enter after converter tapping
RH refine, RH refine early stage starts oxygen blast and carries out forcing decarburization, and oxygen decarburization opportunity is shifted to an earlier date thus reaching the quick decarburization of early stage
Purpose；Force after decarburization terminates, entering the second-time burning stage proceeds oxygen blast, the oxygen blast flow in second-time burning stage according to
RH C content difference of arriving at a station assumes ladder distribution, and the CO gas heat release that generates by burning carries out temperature drop compensation.So, solve
The technical problem that present in prior art RH refining process decarbonization rate is low, RH temperature drop is big, so obtain RH can be
Carbon content is taken off to less than 0.0015% in 15min, RH arrives at a station and breaks air temperature fall to RH and control the technology within 15 DEG C to imitate simultaneously
Really.
It should be noted last that, above specific embodiment only in order to technical scheme to be described and unrestricted,
Although being described in detail to the present invention with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent, without deviating from the spirit and scope of technical solution of the present invention, it all should be covered
In the middle of scope of the presently claimed invention.
Claims (9)
1. a kind of quick decarburization of RH and reduce temperature drop method it is characterised in that including：
Converter smelting endpoint carries out catch carbon practice；
RH refine is entered, RH refine early stage starts oxygen blast and carries out forcing decarburization after converter tapping；
After forcing decarburization to terminate, the entrance second-time burning stage proceeds oxygen blast, and the oxygen blast flow in second-time burning stage is according to RH
C content of arriving at a station difference assumes ladder distribution, and the CO gas heat release generating by burning carries out temperature drop compensation.
2. the quick decarburization of RH as claimed in claim 1 and the method that reduces temperature drop are it is characterised in that described converter smelting
Terminal carries out catch carbon practice, including：Control endpoint carbon content of converter 0.06～0.08%.
3. the quick decarburization of RH as claimed in claim 1 and the method that reduces temperature drop are it is characterised in that described pressure decarburization
Adopt identical rifle position with two stages of second-time burning.
4. the quick decarburization of RH as claimed in claim 1 and reduce the method for temperature drop it is characterised in that before described RH refine
Phase starts oxygen blast and carries out forcing decarburization to be specially：Proceed by oxygen blast when RH vacuum reaches 180mbar.
5. the quick decarburization of the RH as described in claim 1 or 4 and reduce the method for temperature drop it is characterised in that described pressure
The blowing oxygen quantity of decarburization and RH arrive at a station C content and RH arrives at a station, and O content meets following relation：Y=-0.15*M+2000*N+29；
Wherein, Y represents blowing oxygen quantity, m3；M represents RH and arrives at a station O content, ppm；N represents RH and arrives at a station the weight/mass percentage composition of C.
6. the quick decarburization of RH as claimed in claim 1 and the method that reduces temperature drop are it is characterised in that described second-time burning
The oxygen blast flow in stage according to RH arrive at a station C content difference present (900～1200)-(500～800)-(200～500)-(0～
300)Nm3The stepped distribution of/h, each stage oxygen blow duration is 40s.
7. the quick decarburization of RH as claimed in claim 1 and reduce temperature drop method it is characterised in that passing through methods described
Carry out RH process 15min, RH terminate C content be less than 0.0015%, RH arrive at a station to RH break air temperature drop control within 15 DEG C.
8. the quick decarburization of RH as claimed in claim 1 and reduce temperature drop method it is characterised in that methods described is suitable for
Require the steel grade below 0.0060% in the mass fraction smelting final finished carbon content.
9. the quick decarburization of RH as claimed in claim 1 and reduce temperature drop method it is characterised in that methods described is suitable for
In 100-300 ton RH refining furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610973985.5A CN106399641B (en) | 2016-10-28 | 2016-10-28 | A kind of method RH quick decarburization and reduce temperature drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610973985.5A CN106399641B (en) | 2016-10-28 | 2016-10-28 | A kind of method RH quick decarburization and reduce temperature drop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106399641A true CN106399641A (en) | 2017-02-15 |
| CN106399641B CN106399641B (en) | 2018-09-28 |
Family
ID=58015012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610973985.5A Active CN106399641B (en) | 2016-10-28 | 2016-10-28 | A kind of method RH quick decarburization and reduce temperature drop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106399641B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112011670A (en) * | 2020-08-20 | 2020-12-01 | 邯郸钢铁集团有限责任公司 | Method for increasing RH refining decarburization rate of ultra-low carbon steel and side blowing device |
| CN113025784A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | Smelting method of ultra-low carbon steel for automobile |
| CN113073174A (en) * | 2020-01-06 | 2021-07-06 | 兰州理工大学 | Method for reducing steel slag adhesion in ultra-low carbon steel smelting process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0741824A (en) * | 1991-08-21 | 1995-02-10 | Kawasaki Steel Corp | Production of high cleanliness steel |
| CN102719593A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Method for smelting ultra-low carbon steel |
| CN103509912A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Method for controlling temperature rise in secondary combustion of vacuum refining exhaust gas |
| CN106048138A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Unkilled steel RH smelting method and temperature compensation method |
-
2016
- 2016-10-28 CN CN201610973985.5A patent/CN106399641B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0741824A (en) * | 1991-08-21 | 1995-02-10 | Kawasaki Steel Corp | Production of high cleanliness steel |
| CN102719593A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Method for smelting ultra-low carbon steel |
| CN103509912A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Method for controlling temperature rise in secondary combustion of vacuum refining exhaust gas |
| CN106048138A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Unkilled steel RH smelting method and temperature compensation method |
Non-Patent Citations (1)
| Title |
|---|
| 贺庆 等: "RH生产超低碳钢的脱碳速率及工艺优化", 《钢铁研究学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073174A (en) * | 2020-01-06 | 2021-07-06 | 兰州理工大学 | Method for reducing steel slag adhesion in ultra-low carbon steel smelting process |
| CN113073174B (en) * | 2020-01-06 | 2022-02-18 | 兰州理工大学 | Method for reducing steel slag adhesion in ultra-low carbon steel smelting process |
| CN112011670A (en) * | 2020-08-20 | 2020-12-01 | 邯郸钢铁集团有限责任公司 | Method for increasing RH refining decarburization rate of ultra-low carbon steel and side blowing device |
| CN113025784A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | Smelting method of ultra-low carbon steel for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106399641B (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102330021B (en) | Full production process of low-temperature oriented silicon steel | |
| CN102212643B (en) | Converter less-slag smelting process | |
| CN108568503B (en) | Method for accurately controlling carbon content of molten steel in 600MPa dual-phase steel tundish | |
| CN108998613B (en) | Method for controlling free oxygen in ultra-low carbon low aluminum steel | |
| CN104975136B (en) | A kind of control method of inclusion in heavy rail thing | |
| CN103243263B (en) | High-cleanliness low-carbon and low-silicon welding steel wire and preparation method of same | |
| CN106399641A (en) | RH rapid decarbonization and molten steel temperature drop reduction method | |
| CN109628697B (en) | High-carbon dephosphorization method for smelting medium-high carbon steel grade in converter | |
| CN109022675B (en) | Energy supply method by using chemical energy for smelting of full-scrap steel electric arc furnace | |
| CN106702069A (en) | Method for producing low phosphorus, low sulfur and ultra-low carbon steel | |
| CN101126113A (en) | Revolving furnace smelt method for high-carbon low-phosphorus steel | |
| CN102051444B (en) | Desulfurizing method of ladle refining furnace and desulfurizing method used for slab-grade steel | |
| CN104946844B (en) | The method of refining of rail steel | |
| CN105063269B (en) | The Slag modification method of rail steel | |
| CN107675069B (en) | Using CO2+O2The method that potassium steel in manganese smelting is protected in decarburization is realized in mixed gas blowing | |
| CN107502704B (en) | Method for reducing alumina inclusions in semisteel steelmaking casting blank | |
| CN103911490A (en) | Method for adding nitrogen to ultra-low carbon enamel molten steel | |
| CN104109727A (en) | Method for smelting low-phosphorous steel by using semisteel through converter | |
| CN107955858A (en) | A kind of production method of ultra-low-carbon steel SAE1006 | |
| CN103773916A (en) | Method for smelting weather resistant steel through high-phosphorus-content steel discharging by converter | |
| CN114657311A (en) | Operation method for directly smelting variety steel by duplex semisteel | |
| CN104946854B (en) | Steel smelting method | |
| CN103667875A (en) | Preparation method of low-carbon acid-resistant pipeline steel | |
| CN110004268B (en) | Method for producing low-carbon killed steel by carbon deoxidation process under normal pressure | |
| CN106591530A (en) | Production method for low-silicon and low-phosphorus-and-sulfur weld wire 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 | ||
| CB02 | Change of applicant information |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant before: Capital Iron & Steel General Company |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |