CN106834591B - A kind of smelting process of copper clad steel - Google Patents
A kind of smelting process of copper clad steel Download PDFInfo
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- CN106834591B CN106834591B CN201710059628.2A CN201710059628A CN106834591B CN 106834591 B CN106834591 B CN 106834591B CN 201710059628 A CN201710059628 A CN 201710059628A CN 106834591 B CN106834591 B CN 106834591B
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- smelting
- copper clad
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- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of smelting processes of copper clad steel, and smelting process successively includes BOF smelting-LF refining-continuous small-billet casting process.BOF smelts control decarburization intensity and tapping temperature, terminal [C]≤0.040%, T=1620~1680 DEG C, slag-stopping tapping；LF refining control slag composition and it is quiet stir the time, (FeO+MnO)≤1.0% is quiet to stir the time >=10min, top of the slag deoxidation and feeds Calcium treatment；Billet continuous casting controls pouring temperature and electromagnetic agitation technique, and liquid fluctuating and drawing speed are stablized in T=1560~1620 DEG C.The smelting process of copper clad steel through the invention has simplified copper clad steel smelting procedure by each accurate control for smelting link, omits pre- desulfurization and vacuum processing, keeps improving production efficiency while product quality and reduces cost, improves competitiveness.
Description
Technical field
The invention belongs to steelmaking technical fields, and in particular to a kind of smelting process of copper clad steel.
Background technique
Copper clad steel is a kind of the steel of NEW TYPE OF COMPOSITE conducting wire can be made in copper coating.This copper clad steel conducting wire utilizes height
The skin effect of frequency signal, the electric conductivity in high-frequency area signal transmitting field are close with the copper conductor of circular section therefore wide
It is general to apply in multiple fields such as electric power, traffic, communication and electronics industries, such as the center conductor of communication cable, the screen of communication cable
Cover litzendraht wire, the lead-foot-line of electronic component, the ground line of twisted wire shape and electric railway route etc..Copper clad steel conducting wire has weight
The advantages such as amount is light, intensity is high, manufacturing cost is low, especially have great meaning on saving rare copper resource.
Patent CN102268595B discloses the production method of copper clad steel, mainly by the control to steel rolling process,
Solves the problems, such as the hardening of easy processing existing for copper-clad steel wire rod.The copper clad steel that cold-forming property is excellent, conductivity is high is provided to produce
Product.Patent CN100403456C discloses copper-cladded iron alloy composite conductor and preparation method thereof, mainly passes through wire drawing machine multi-pass
Wire drawing die drawing makes copper, ferroalloy interface become compound wire by metallurgical bonding.Patent CN100510112C discloses short stream
Journey super low carbon steel ultra-low sulphur smelting control method, using KR desulfurization-converter-RH powder injection desulphurization-continuous casting process, by technique mistake
The optimal control of design parameter is in journey to obtain the ultra-low-carbon steel for meeting super-low sulfur requirement.Patent CN102134629B is disclosed
The smelting process of a kind of low silicon, ultralow-sulfur steel mainly passes through molten iron " complete three is de- " pretreatment-decarburization converter smelting-LF refining work
Skill produces low silicon, ultralow-sulfur steel.Guarantee the low silicon low-sulfur of molten steel by the desiliconization pretreatment of KR desulfurization pretreatment, dephosphorization converter.
Summary of the invention
The present invention provides a kind of smelting process of copper clad steel, by smelting the process matching of link, has simplified copper clad steel smelting
Process is refined, pre- desulfurization and vacuum processing are omitted, keep improving production efficiency while product quality and reduces cost, is improved competing
Strive power.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of smelting process of copper clad steel, including BOF smelting-LF refining-continuous small-billet casting process, specific as follows:
(1) during BOF smelts, terminal [C]≤0.040%, outlet temperature is 1620~1680 DEG C, slag-stopping tapping, when tapping
Ladle bottom blowing argon gas simultaneously controls argon pressure；
(2) in LF refining, whole process micro-pressure operation controls slag composition, and top of the slag addition aluminum steel quickly makes white slag, preceding
Phase molten steel adds enough disposable deoxidations of aluminium alloy, and Calcium treatment is carried out after refining treatment is complete, and molten steel guarantee is quiet to stir the time；
(3) in continuous small-billet casting, whole process argon gas protective casting controls the matching of pouring temperature and drawing speed, in
Between non-carbon residue feather edge coverture, crystallizer low carbon protective slag, can be used electromagnetic agitation.
Further, in the smelting process BOF smelting process of the copper clad steel, ladle bottom blowing argon gas when tapping, early period pressure
Power controls 0.5~1.0Mpa, and the later period is adjusted to 0.2~0.5Mpa.
Further, during the smelting process LF refining of the copper clad steel, slag composition are as follows: (FeO+MnO)≤
1.0%, (CaO)/(SiO2) it is 8.0~12.0, SiO2≤ 5%.
Further, during the smelting process LF refining of the copper clad steel, the disposable deoxidation of molten steel, Al 0.020~
0.060%, Ca 0.0015%~0.0025% after Calcium treatment, it is quiet to stir the time >=10min.
Further, in the smelting process billet in continuous casting process of the copper clad steel, pouring temperature is 1560~1620 DEG C,
Drawing speed is controlled in 2.4~2.8m/min.
Compared with prior art, the present invention at least has the following beneficial effects:
The smelting process of copper clad steel is short route smelting in the present invention, only includes BOF smelting-LF refining-billet continuous casting；
BOF tapping promotes the residual oxygen in molten steel sufficiently to react with carbon using argon gas stirring；The quick deoxidation of LF refining, the low silicon clinker of high alkalinity
Desulfurization rapidly, reduces the carburetting and nitrogen pick-up of refining process, and Calcium treatment and quiet stir make field trash sufficiently float；Continuous casting process control
Pouring temperature and drawing speed promote inclusion floating and avoid nozzle blocking.The present invention has simplified copper clad steel smelting procedure, saves
Slightly pre- desulfurization and vacuum processing keep improving production efficiency while product quality and reduce cost, improve competitiveness.
Specific embodiment
Embodiment 1
It is BOF smelting-LF refining-continuous small-billet casting process that the short route of copper clad steel, which smelts process,.It is specific as follows:
(1) during BOF smelts, terminal [C]=0.035%, T=1624 DEG C of terminal, slag-stopping tapping, molten steel P=0.010%, S
=0.022%；Ladle bottom blowing argon gas when tapping, pressure early period are 0.8Mpa, later period 0.4Mpa, are stirred by argon gas and promote steel
Residual oxygen in water is sufficiently reacted with carbon, molten steel C=0.021%.
(2) in LF refining, whole process micro-pressure operation；Clinker (FeO+MnO)=0.86%, (CaO)/(SiO2)=
11.3 SiO2=4.72%.Top of the slag addition aluminum steel quickly makes white slag, and molten steel early period adds enough disposable deoxidations of aluminium alloy, Al
=0.026%, Calcium treatment is carried out after refining treatment is complete, Ca=0.0017% is quiet to stir the time=12min, it is ensured that field trash is abundant
It floats.
(3) in continuous small-billet casting, whole process argon gas protective casting controls T=1579 DEG C of pouring temperature, drawing speed control
System is in 2.7m/min；Tundish carbon-free covering agent, crystallizer low carbon protective slag, further increase slab using electromagnetic agitation
Quality.
Impurity element in final molten steel is C=0.033%, Si=0.04%, P=0.010%, S=0.005%, T
[O]=0.0026%, [N]=0.0035%.Wire rod is rolled into using the small billet that this method produces, meets the quality of copper clad steel
It is required that being finally drawn intoSteel wire.
Embodiment 2
It is BOF smelting-LF refining-continuous small-billet casting process that the short route of copper clad steel, which smelts process,.It is specific as follows:
(1) during BOF smelts, terminal [C]=0.031%, T=1671 DEG C of terminal, slag-stopping tapping, molten steel P=0.009%, S
=0.028%；Ladle bottom blowing argon gas when tapping, pressure early period are 0.7Mpa, later period 0.5Mpa, are stirred by argon gas and promote steel
Residual oxygen in water is sufficiently reacted with carbon, molten steel C=0.019%.
(2) in LF refining, whole process micro-pressure operation；Clinker (FeO+MnO)=0.78%, (CaO)/(SiO2)=
9.8, SiO2=4.45%.Top of the slag addition aluminum steel quickly makes white slag, and molten steel early period adds enough disposable deoxidations of aluminium alloy, Al=
0.042%, carry out Calcium treatment after refining treatment is complete, Ca=0.0022% is quiet to stir the time=11min, it is ensured that field trash sufficiently on
It is floating.
(3) in continuous small-billet casting, whole process argon gas protective casting controls T=1574 DEG C of pouring temperature, drawing speed control
System is in 2.4m/min；Tundish carbon-free covering agent, crystallizer low carbon protective slag, further increase slab using electromagnetic agitation
Quality.
Impurity element in final molten steel is C=0.039%, Si=0.03%, P=0.009%, S=0.006%, T
[O]=0.0028%, [N]=0.0029%.Wire rod is rolled into using the small billet that this method produces, meets the quality of copper clad steel
It is required that being finally drawn intoSteel wire.
Embodiment 3
It is BOF smelting-LF refining-continuous small-billet casting process that the short route of copper clad steel, which smelts process,.It is specific as follows:
(1) during BOF smelts, terminal [C]=0.030%, T=1655 DEG C of terminal, slag-stopping tapping, molten steel P=0.009%, S
=0.028%；Ladle bottom blowing argon gas when tapping, pressure early period are 0.7Mpa, later period 0.5Mpa, are stirred by argon gas and promote steel
Residual oxygen in water is sufficiently reacted with carbon, molten steel C=0.019%.
(2) in LF refining, whole process micro-pressure operation；Clinker (FeO+MnO)=0.82%, (CaO)/(SiO2)=
10.5 SiO2=4.79%.Top of the slag addition aluminum steel quickly makes white slag, and molten steel early period adds enough disposable deoxidations of aluminium alloy, Al
=0.032%, Calcium treatment is carried out after refining treatment is complete, Ca=0.0021% is quiet to stir the time=12min, it is ensured that field trash is abundant
It floats.
(3) in continuous small-billet casting, whole process argon gas protective casting controls T=1574 DEG C of pouring temperature, drawing speed control
System is in 2.8m/min；Tundish carbon-free covering agent, crystallizer low carbon protective slag do not use electromagnetic agitation.
Impurity element in final molten steel is C=0.039%, Si=0.04%, P=0.010%, S=0.007%, T
[O]=0.0031%, [N]=0.0026%.Wire rod is rolled into using the small billet that this method produces, meets the quality of copper clad steel
It is required that being finally drawn intoSteel wire.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At method, fall within the scope of protection required by the present invention.
Claims (5)
1. a kind of smelting process of copper clad steel, it is characterised in that: including BOF smelting-LF refining-continuous small-billet casting process, specifically
It is as follows:
(1) during BOF smelts, terminal [C]≤0.040%, outlet temperature is 1620~1680 DEG C, slag-stopping tapping, ladle when tapping
Argon bottom-blowing simultaneously controls argon pressure；
(2) in LF refining, whole process micro-pressure operation controls slag composition, and top of the slag addition aluminum steel quickly makes white slag, early period steel
Water adds enough disposable deoxidations of aluminium alloy, and Calcium treatment is carried out after refining treatment is complete, and molten steel guarantee is quiet to stir the time；
(3) in continuous small-billet casting, whole process argon gas protective casting controls the matching of pouring temperature and drawing speed, tundish
With carbon-free covering agent, crystallizer low carbon protective slag, electromagnetic agitation can be used.
2. the smelting process of copper clad steel according to claim 1, it is characterised in that: in the BOF smelting process, when tapping
Ladle bottom blowing argon gas, pressure early period control 0.5~1.0Mpa, and the later period is adjusted to 0.2~0.5Mpa.
3. the smelting process of copper clad steel according to claim 1, it is characterised in that: during the LF refining, clinker at
It is divided into: (FeO+MnO)≤1.0%, (CaO)/(SiO2) it is 8.0~12.0, SiO2≤ 5%.
4. the smelting process of copper clad steel according to claim 1, it is characterised in that: during the LF refining, molten steel one
Secondary property deoxidation, Al 0.020~0.060%, Ca 0.0015%~0.0025% after Calcium treatment are quiet to stir the time >=10min.
5. the smelting process of copper clad steel according to claim 1, it is characterised in that: in the billet in continuous casting process, pour
Infusing temperature is 1560~1620 DEG C, and drawing speed is controlled in 2.4~2.8m/min.
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| CN106011639A (en) * | 2016-05-23 | 2016-10-12 | 唐山钢铁集团有限责任公司 | Method for producing low-alloy peritectic steel by conventional slab continuous casting machine |
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| CN106011639A (en) * | 2016-05-23 | 2016-10-12 | 唐山钢铁集团有限责任公司 | Method for producing low-alloy peritectic steel by conventional slab continuous casting machine |
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