CN110218843A - A kind of molten steel wash heat purification device and purification method - Google Patents
A kind of molten steel wash heat purification device and purification method Download PDFInfo
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- CN110218843A CN110218843A CN201910398091.1A CN201910398091A CN110218843A CN 110218843 A CN110218843 A CN 110218843A CN 201910398091 A CN201910398091 A CN 201910398091A CN 110218843 A CN110218843 A CN 110218843A
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- molten steel
- slag
- container containing
- wash heat
- purification device
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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
- C21C7/072—Treatment with gases
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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
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
Abstract
The present invention discloses a kind of molten steel slag purification device and purification method, for there are the high erosion refining slags of low melting point during wash heat effect is undesirable and wash heat the technological difficulties such as to have very strong erosion to molten steel container containing liner and not be available during current molten steel wash heat, the invention proposes a kind of molten steel wash heat purification device and application methods, purpose is to solve technological difficulties existing in the prior art, the refining slag for making the high erosion of low melting point favorably remove field trash in molten steel is used to purified treatment molten steel, to reinforce the wash heat clean-up effect of wash heat, exploitation for high added value steel grade creates conditions.
Description
Technical field
The invention belongs to field of iron and steel smelting, more particularly to a kind of molten steel slag purification device and purification method.
Background technique
Due to the presence of non-metallic inclusion, the mechanical properties such as the serious intensity for affecting steel, plasticity make high-performance steel
The exploitation of kind is restricted.In order to utmostly remove the non-metallic inclusion in molten steel, French engineer P in 1933
Pemin proposes the slag charge centainly while tapping with the addition of steel stream with desulfurizing agent, deoxidier and slag modification agent, carries out steel
The mixed punching of slag, good dynamics condition caused by the mixed punching of handy steel slag promote desulfurization reaction of Salmon-Saxl sufficiently to expand slag steel response area
It carries out, achievees the effect that cleaning molten steel.Since wash heat is mingled with removal molten steel, effect is obvious, this technology is also each up to now
Steel mill is used.Since the technology is that slag charge is added in tapping process, increase slag interface contact by the impact of steel stream,
It is adsorbed to the field trash in molten steel in slag, to complete molten steel purifying purpose.Its clean-up effect and steel slag contact surface connect
The time is touched, slag charge state has direct relation in contact process, it is not difficult to find out that steel slag contact surface is bigger, time of contact is longer, contact
Slag is that liquid is more conducive to molten steel purifying in the process.In order to reach such metallurgical effect, opened in electroslag remelting process
Have issued the Al containing 30%2O3With 70% CaF2" pseudo-ginseng slag ", but due to CaF a large amount of in slag2Have to refractory material extremely strong
Erosion, there is presently no what refractory materials can resist the slag etch, and this slag system can be used only in electroslag remelting at this stage
Copper crystallizer in.But electroslag remelting production efficiency is low, and processing steel amount is limited, is not able to satisfy mass production requirement, in order to incite somebody to action
The slag system needs a kind of auxiliary device on high-volume purification molten steel.
Summary of the invention
For during current molten steel wash heat, there are the high erosions of low melting point during wash heat effect is undesirable and wash heat
Refining slag has very strong erosion to molten steel container containing liner and the technological difficulties such as is not available, and the invention proposes one kind
Molten steel wash heat purification device and application method, it is therefore intended that solve technological difficulties existing in the prior art, soak low melting point height
The refining slag that corrosion favorably removes field trash in molten steel is used to purified treatment molten steel to reinforce the wash heat clean-up effect of wash heat
The exploitation of high added value steel grade creates conditions.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of molten steel slag purification device, it is characterised in that: including heating system, molten steel container containing, cooling system, electromagnetism
Stirring system, tapping system and bottom blowing system；The heating system includes power supply, anode, cathode, rise fall of electrodes frame and driving
Device；The molten steel container containing includes that shell, liner flame retardant coating and consumption lining, the consumption lining contact refining slag and two
Person's ingredient is identical, is equipped with cooling system in the consumption lining, the cooling system include be arranged in it is cold inside consumption lining
But pipe and coupled cooling medium upstream end and cooling medium outlet side；It is equipped in the outside of molten steel container containing by electromagnetism
The lower part of consumption lining is arranged in the electromagnetic stirring system of blender composition, position；The bottom of molten steel container containing is equipped with bottom blowing
System and tapping system, the bottom blowing system includes air brick；The tapping system includes tapping channel and slide plate.
The described consumption liner with a thickness of 400~700mm, be highly 1000~2000mm, ingredient and melt cinder ingredient
It is identical.
The cooling tube is spiral shape cooling tube.
The magnetic stirrer is distributed in the outside of molten steel container containing in a spiral manner.
Corner dimension between the connecting line and consumption liner descender line of magnetic stirrer is 10~30 °.
The technical parameter of magnetic stirrer is as follows: voltage be 450~600V, electric current be 600~900A, frequency be 3~
10Hz, power are 300~500kW, and stirring mode is alternating and continuous two kinds of auger modes.
A kind of purification method of molten steel slag purification device, it is characterised in that include the following steps:
Molten steel to be processed is encased in molten steel container containing by step 1), and charge weight control is in the consumption of molten steel identity distance
Substrate is along 100~300mm；
The cathode of heating and anode are passed through hydraulic driver simultaneously and transferred in molten steel container containing by step 2), and
The lower end surface of electrode is adjusted to away from 300~500mm of molten steel face；
Step 3) is blown into nitrogen into cooling tube by cooling medium upstream end, is discharged by cooling medium outlet side, nitrogen
The pressure of gas is controlled in 0.3~0.6MPa；
Step 4) is first put into 1/4~1/2 refining slag in molten steel container containing, then through air brick into molten steel
It is blown into argon gas, argon flow control is melted this part refining slag using the heat of molten steel in 400~1000NL/min, to
Argon flow all after fusing, is adjusted to 50~100NL/min by refining slag, and is started heating system and passed through heating electrode pair
Refining slag is heated；
Remaining refining slag is added continuously in molten steel container containing by step 5) with the speed of 300~500kg/min,
Start magnetic stirrer simultaneously and screw mixing is implemented to slag interface；The voltage of magnetic stirrer is first controlled in 500~600V,
Electric current is in 800~900A, and frequency is in 3~5Hz, and power is in 450~500Kw, using alternately spiral electromagnetic stirring mode processing
15~25 minutes；The voltage of magnetic stirrer is then controlled in 450~500V, electric current in 600~800A, frequency in 5~10Hz,
In 300~400Kw, handled using continuously spiral mode of electromagnetic stirring to wash heat is terminated power；
After step 6) wash heat, magnetic stirrer is closed, while the argon flow of air brick is adjusted to 60NL/min
Hereinafter, and heating electrode is proposed, the wash heat purification run to 3~5min of molten steel calmness completion molten steel.
The present invention can get following the utility model has the advantages that molten steel 1) can be made to sufficiently achieve wash heat effect, the cleanliness of molten steel
Horizontal more current steel treatment can improve 50~80%, create conditions for the exploitation of high added value steel grade；2) can will have
Very strong erosion refining slag is on directly processing molten steel, it is not necessary to worry etch of the melt cinder to molten steel container containing liner；3)
Consumption liner is identical as melt cinder ingredient, and the fluctuation of melt cinder performance indexes will not be generated because of liner consumption, makes refining process
It is more steady；4) it is equipped with cooling tube in consumption liner, cooling processing can be carried out to liner, the etch for alleviating liner disappears
Consumption；5) can be achieved heating compensation is carried out to molten steel, prevent molten steel temperature drop during wash heat excessive and influence next procedure into
Row.
Detailed description of the invention
Fig. 1 is a kind of its schematic diagram of molten steel wash heat purification device；
Fig. 2 is magnetic stirrer arrangement top view；
Fig. 3 is magnetic stirrer arrangement schematic diagram after the expansion of molten steel container containing outer layer；
Wherein, 1- power supply, 2- consumption lining, 3- cooling tube, 4- liner flame retardant coating, 5- air brick, 6- tapping channel, 7- are sliding
Plate, 8- shell, 9- molten steel, 10- refining slag, 11- driving device, 12- magnetic stirrer, 13- cooling medium outlet side；14- electricity
Pole crane, 15- cathode；16- anode, 17- cooling medium upstream end.
Specific embodiment
It is illustrated combined with specific embodiments below:
A kind of molten steel wash heat purification device is respectively by power supply heating system, molten steel container containing, cooling system, electromagnetic agitation
System, tapping system and bottom blowing system are constituted.Wherein, power supply heating system is by power supply 1, anode 16, cathode 15, rise fall of electrodes
Frame 14 and fluid pressure drive device 11 form.Molten steel container containing is made of shell 8, liner flame retardant coating 4, consumption lining 2, wherein disappearing
Consume liner with a thickness of 500mm, be highly 1200mm.It is equipped with cooling system in consumption liner layer, which is disappeared by being arranged in
The spiral shape cooling tube 3 and coupled cooling medium upstream end 17 and outlet side 13 consumed inside lining is constituted.In order to improve
The interface reaction kinetics condition of molten steel 9 and melt cinder 10 inside container, under the outside and consumption lining of molten steel container containing
Portion's corresponding position is equipped with the electromagnetic stirring system being made of the magnetic stirrer 12 of spiral point distribution.Magnetic stirrer 12 is in level
The projector distance in face is in be equally spaced, after the expansion of molten steel container containing outer layer, in the connecting line and consumption of magnetic stirrer
Lining descender line between be in angle Β size be 15 °, magnetic stirrer, technical parameter it is as follows: voltage 500V, electric current are
700A, frequency 5Hz, power 400kW, stirring mode are alternating and continuous two kinds of auger modes.
A kind of purification method of molten steel wash heat purification device is as follows:
Molten steel 9 to be processed is encased in molten steel container containing by step 1, and charge weight control is in the consumption of molten steel identity distance
2 bottoms are served as a contrast along 200mm；
The cathode 15 of heating and anode 16 are transferred to molten steel container containing by fluid pressure drive device 11 simultaneously by step 2
In the middle, and by the lower end surface of electrode it is adjusted to away from the 350mm of molten steel face；
Step 3 is blown into nitrogen into spiral shape cooling tube 3, and the pressure of nitrogen is controlled in 0.4MPa；
Step 4 is first put into 1/4 refining slag in molten steel container containing, is then blown by air brick 5 into molten steel 9
Argon gas, argon flow control are melted this part refining slag using the heat of molten steel, slag charge to be refined is complete in 600NL/min
After portion's fusing, argon flow is adjusted to 70NL/min, and startup power supply heating system carries out refining slag by heating electrode
Heating；
Remaining refining slag is added continuously in molten steel container containing by step 5 with the speed of 350kg/min, is opened simultaneously
Dynamic magnetic stirrer implements screw mixing to slag interface.Voltage control exists in 550V, current control in 850A, frequency control
3Hz, power control are handled 20 minutes in 460kW, stirring mode using alternately spiral electromagnetic stirring mode.Then blender
Voltage control is in 460V, and current control is in 600A, and frequency control is in 6Hz, and power control is in 300kW, and stirring mode is using continuous
Spiral electromagnetic stirring mode.
After step 6 wash heat, magnetic stirrer is closed, while the argon flow of air brick 5 is adjusted to 30NL/min,
And propose heating electrode, the wash heat purification run of molten steel is completed to molten steel calmness 3min.
Claims (7)
1. a kind of molten steel slag purification device, it is characterised in that: stirred including heating system, molten steel container containing, cooling system, electromagnetism
Mix system, tapping system and bottom blowing system；The heating system includes power supply, anode, cathode, rise fall of electrodes frame and driving dress
It sets；The molten steel container containing includes that shell, liner flame retardant coating and consumption lining, the consumption lining contact refining slag and the two
Ingredient is identical, and cooling system is equipped in the consumption lining, and the cooling system includes the cooling being arranged in inside consumption lining
Pipe and coupled cooling medium upstream end and cooling medium outlet side；It is equipped in the outside of molten steel container containing and is stirred by electromagnetism
The electromagnetic stirring system of device composition is mixed, the lower part of consumption lining is arranged in position；The bottom of molten steel container containing is equipped with bottom blowing system
System and tapping system, the bottom blowing system includes air brick；The tapping system includes tapping channel and slide plate.
2. a kind of molten steel slag purification device according to claim 1, it is characterised in that: the described consumption liner with a thickness of
400~700mm is highly 1000~2000mm, and ingredient is identical as melt cinder ingredient.
3. a kind of molten steel slag purification device according to claim 1, it is characterised in that: the cooling tube is cooling for spiral shape
Pipe.
4. a kind of molten steel slag purification device according to claim 1, it is characterised in that: the magnetic stirrer is with spiral
Mode is distributed in the outside of molten steel container containing.
5. a kind of molten steel slag purification device according to claim 1, it is characterised in that: the connection of the magnetic stirrer
Angle between line and consumption liner descender line is 10~30 °.
6. a kind of molten steel slag purification device according to claim 1, it is characterised in that: the magnetic stirrer voltage is
450~600V, electric current are 600~900A, and frequency is 3~10Hz, and power is 300~500kW, and stirring mode is alternately and continuous
Two kinds of auger modes.
7. a kind of purification method using molten steel slag purification device described in claim 1-6, it is characterised in that include the following steps:
Molten steel to be processed is encased in molten steel container containing by step 1), charge weight control substrate in molten steel identity distance consumes
Along 100~300mm；
The cathode of heating and anode are passed through driving device simultaneously and transferred in molten steel container containing by step 2), and by electrode
Lower end surface be adjusted to away from 300~500mm of molten steel face；
Step 3) is blown into nitrogen into cooling tube by cooling medium upstream end, is discharged by cooling medium outlet side, nitrogen
Pressure is controlled in 0.3~0.6MPa；
Step 4) is first put into 1/4~1/2 refining slag in molten steel container containing, is then blown by air brick into molten steel
Argon gas, argon flow control is melted this part refining slag using the heat of molten steel in 400~1000NL/min, to be refined
Argon flow all after fusing, is adjusted to 50~100NL/min by slag charge, and starts heating system by heating electrode to refining
Slag is heated；
Remaining refining slag is added continuously in molten steel container containing by step 5) with the speed of 300~500kg/min, simultaneously
Start magnetic stirrer and screw mixing is implemented to slag interface；The voltage of magnetic stirrer is first controlled in 500~600V, electric current
In 800~900A, frequency in 3~5Hz, power in 450~500Kw, using alternately spiral electromagnetic stirring mode processing 15~
25 minutes；The voltage of magnetic stirrer is then controlled in 450~500V, electric current is in 600~800A, and frequency is in 5~10Hz, power
In 300~400Kw, being handled using continuously spiral mode of electromagnetic stirring to wash heat is terminated；
After step 6) wash heat, close magnetic stirrer, at the same the argon flow of air brick is adjusted to 60NL/min hereinafter,
And propose heating electrode, the wash heat purification run of molten steel is completed to 3~5min of molten steel calmness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910398091.1A CN110218843A (en) | 2019-05-14 | 2019-05-14 | A kind of molten steel wash heat purification device and purification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910398091.1A CN110218843A (en) | 2019-05-14 | 2019-05-14 | A kind of molten steel wash heat purification device and purification method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335722A (en) * | 1986-07-31 | 1988-02-16 | Nippon Steel Corp | Metal bath stirring type molten metal treating apparatus |
| CN1501984A (en) * | 2001-04-02 | 2004-06-02 | Ŧ�ƶ��� | Ladle refining of steel |
| CN101302570A (en) * | 2008-06-18 | 2008-11-12 | 中国科学院金属研究所 | Secondary refining method of 10 to 30 tons bottom breakout ladle |
| CN201545899U (en) * | 2009-11-25 | 2010-08-11 | 南昌市南方连铸工程有限责任公司 | High-function electroslag induction furnace |
| CN104388689A (en) * | 2014-11-28 | 2015-03-04 | 中国科学院金属研究所 | Method and device for casting electromagnetic compound control electroslag remelting fine grains |
| CN207655875U (en) * | 2017-12-14 | 2018-07-27 | 鞍钢股份有限公司 | A kind of efficient electroslag wash heat device |
-
2019
- 2019-05-14 CN CN201910398091.1A patent/CN110218843A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335722A (en) * | 1986-07-31 | 1988-02-16 | Nippon Steel Corp | Metal bath stirring type molten metal treating apparatus |
| CN1501984A (en) * | 2001-04-02 | 2004-06-02 | Ŧ�ƶ��� | Ladle refining of steel |
| CN101302570A (en) * | 2008-06-18 | 2008-11-12 | 中国科学院金属研究所 | Secondary refining method of 10 to 30 tons bottom breakout ladle |
| CN201545899U (en) * | 2009-11-25 | 2010-08-11 | 南昌市南方连铸工程有限责任公司 | High-function electroslag induction furnace |
| CN104388689A (en) * | 2014-11-28 | 2015-03-04 | 中国科学院金属研究所 | Method and device for casting electromagnetic compound control electroslag remelting fine grains |
| CN207655875U (en) * | 2017-12-14 | 2018-07-27 | 鞍钢股份有限公司 | A kind of efficient electroslag wash heat device |
Non-Patent Citations (1)
| Title |
|---|
| 郭庆涛 等: "《新型螺旋电磁搅拌技术研究》", 《第三届全国电磁冶金与强磁场材料学会议》 * |
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