CN108359769A - A kind of method and device carrying out deoxidation alloying with silicon oxide-containing material - Google Patents
A kind of method and device carrying out deoxidation alloying with silicon oxide-containing material Download PDFInfo
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- CN108359769A CN108359769A CN201810147741.0A CN201810147741A CN108359769A CN 108359769 A CN108359769 A CN 108359769A CN 201810147741 A CN201810147741 A CN 201810147741A CN 108359769 A CN108359769 A CN 108359769A
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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
- C21C7/06—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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/33—Silicon
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
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Abstract
Silica fusion electrolysis is restored and completes deoxygenation of liquid steel alloying by a kind of method and device carrying out deoxidation alloying with silicon oxide-containing material of the present invention, this method application electric field.I.e. after pneumatic steelmaking, appropriate silicon oxide-containing material is added into slag, using molten steel as cathode, apply a DC electric field by being placed between the inert anode in slag and cathode, carry out the fusion electrolysis reduction reaction of silica, Si reduction in silica is entered into molten steel and achievees the purpose that deoxidation alloying, and the oxygen in silica is then discharged into air by the way that anode reaction occurs with inert anode in the form of oxygen.The present invention can be such that silica fusion electrolysis restores, and can also increase the elemental silicon of certain content to molten steel while superfluous free oxygen in completing removing molten steel.Device is constituted simply, easy to operate, completes cost-efficiently deoxidation alloying purpose using silica, CO may be implemented2Zero-emission achievees the purpose that low-carbon environment-friendly, social and economic benefits are huge.
Description
Technical field
The present invention relates to iron and steel smelting technology field more particularly to a kind of carrying out deoxidation alloying with silicon oxide-containing material
Method and device.
Background technology
Deoxidation alloying is one of the basic task of steel-making.Oxygen top-blown converter is supplied oxygen from oxygen rifle into molten steel, can not be kept away
The meeting exempted from makes endpoint molten steel contain superfluous oxygen.And oxygen either with gaseous state, dissolving oxygen condition, still in the form of an oxide
There are the quality that steel can be all reduced in steel.So after converter smelting deoxidation alloying operation must be carried out to molten steel, it will
Superfluous oxygen removal in molten steel.Currently, most steel mills all use simple deoxidation alloying process, i.e., in converter smelting
Deoxidation alloying is carried out to addition ferrosilicon, ferromanganese, fero-manganesesilicon, aluminium ingot etc. in molten steel after end, the recovery rate of alloy is relatively low, closes
Gold consumption is larger, and steel-making cost is higher.Under the Market Situation of current rigorous, enterprises are taped the latent power the weight just detracted at one
Want means.In production technology, how to accomplish that low cost, high-efficiency reform are that an iron and steel enterprise is stood on not in market competition
The necessary condition on the ground lost.Therefore, deoxidation cost how is reduced, realizes economical steel-making, is that steel-making worker pursues always
Target.
The distinctive mechanics of silicon and physicochemical characteristics become the basic material of support human social development.From at we
Face is considered, and silica is undoubtedly predecessor prepared by most economical extensive silicon, thus it is to be based on that existing silicon is industrially prepared
Carbon thermal reduction silica, the opposite chemical inertness based on oxide, carbothermic method prepare silicon and generally require very high temperature
It spends to ensure the quick and complete progress of reduction (reaction temperature that carbothermic method prepares silicon is generally carried out at l700 DEG C or more).Such as
This high reaction temperature inevitably brings a large amount of heat loss, thus carbothermic method prepare silicon energy efficiency it is not high
(about 30%).For in terms of the environment and resource, carbothermic method consumes a large amount of carbon-based material, and a large amount of forests is caused to be destroyed
With a large amount of carbon emission.In terms of about 10,000,000 t of total output of whole world metallic silicons in 2009 and ferrosilicon, prepared using carbon thermal reduction
Silicon can discharge about 62,000,000 t of carbon dioxide；And about 10,000,000 t of charcoal is consumed, 6,250,000 hm of forest is about needed2。
Different with traditional carbothermic method, electrochemistry metallurgical process, as energy carrier, is effectively prevented from using electronics
The introducing of impurity (carbon and other nonmetallic).Importantly, electronics itself is the energy carrier of green, do not bring additional
Carbon emission.The existing a large amount of electric energy infrastructure of human society, and come from green regenerative energy sources (solar energy, wind energy, underground heat
Can, tide energy and nuclear energy etc.) installed capacity of the electric energy in power grid constantly rise, therefore electrochemistry metallurgical process is expectable
It is more green semiconductor manufacturing process.And the activity of electronics accurately can easily be regulated and controled by adjusting electrode potential, therefore
Theoretically it is obtained to can be transferred through electrochemical process for all metals, semiconductor and alloy.In practical electrolytic process, electronically active regulation and control
The limit be limited by the electrochemical window of electrolyte.Traditional aqueous is since electrochemical window is relatively narrow, only a small number of elements
It can prepare on a large scale in aqueous solution (such as nickel, cobalt, lead and zinc etc.).Inorganic fused salt has very as a kind of ion conductor
The ability of wide electrochemical window and stronger dissolved compound, therefore be the electrolyte of ideal electrochemistry metallurgy.Fused salt electricity
The advantages of chemical metallurgy, is embodied in the immense success of Aluminium Industry (using fused salt electrodeposition process).
Containing SiO2Slag can also regard a kind of fused salt mixt as, that just inspires our to introduce the method for electrochemistry and passes
It unites in smelting process, applies suitable electric field between slag and molten steel system, you can reach and utilize SiO2Carry out deoxygenation of liquid steel
The green low cost process of alloying can be substantially reduced energy consumption, mitigate carrying capacity of environment, can also significantly reduce production cost,
With good social and economic effects.
The Chinese invention patent " method for using ferro-silico-manganese deoxidation alloying " of Publication No. CN102653811A, relates to
And a kind of method using ferro-silico-manganese deoxidation alloying, this approach includes the following steps：The dissolving in converter is detected first
Then oxygen content adds when the dissolved oxygen content in converter arrives 600-1300ppm by blowing as converter terminal into ladle
Add ferro-silico-manganese, stops addition ferro-silico-manganese when the dissolved oxygen content in ladle reaches 100-300ppm, recycle and feed
Silk machine inputs aluminum steel into ladle, stops input aluminum steel when the dissolved oxygen content in ladle reaches 15-35ppm, as smelts
Steel grade.This method is used using the silicon contained by ferro-silico-manganese in the content removal molten steel of high-solubility oxygen containing elemental silicon
Deoxidation alloying after ferrosilicon or silicon alloy are made steel operates, and the Technical Economy is bad.
The Chinese invention patent " Silicomanganese efficient absorption alloy ball and preparation method thereof " of Publication No. CN103131820A, relates to
And a kind of Silicomanganese efficient absorption alloy ball, it is to be mixed by silicomangan, ferrosilicon, manganese ore, high alumina cement, binder, and be made
Grain size is the alloying pellet of 20~50mm, and the alloys such as traditional ferrosilicon, high carbon ferromanganese, silicomanganese used are replaced with this alloying pellet, can
Ton steel cost is set to be remarkably decreased, it, which can not only be improved, increases silicon, increases manganese efficiency, improves alloy recovery, and can replace biography completely
The alloys such as ferrosilicon, high carbon ferromanganese, the silicomanganese that system uses, deoxygenation is quick, and alloying speed is fast.This silicomanganese efficient absorption is closed
A certain amount of high alumina cement and binder are additionally added in gold goal in addition to silicomangan, is increased to smelting system in steelmaking process
Impurity, polluted molten steel, and application prospect is bad.
A kind of Chinese invention patent " side for improving semi-steel making Si yield of alloy of Publication No. CN103993124A
Method " is related to a kind of method improving semi-steel making Si yield of alloy, and the method includes being added after being blended into half steel in converter
Slag making materials carry out converter smelting, then carry out converter smelting endpoint control and tap, and in tapping process, ferrosilicon is added to institute
It states half steel and carries out increasing silicon, which is characterized in that the slag making materials include ferrosilicon, active lime and dolomitic lime, the slag making material
The addition of material makes slag basicity for 3-4, and the addition of ferrosilicon is 4-6kg/ tons of steel in the slag making materials.Using the present invention
The method of offer can realize highcasting speed tapping, effectively reduce terminal oxygen activity, to effectively improve Si yield of alloy.This
Silicon alloy method belongs to the conventional method for carrying out alloying using the alloy containing elemental silicon, and technical economic benefit is bad.
Invention content
The object of the present invention is to provide a kind of method and device carrying out deoxidation alloying with silicon oxide-containing material, this method
Silica fusion electrolysis is restored using electric field and completes deoxygenation of liquid steel alloying.It is a kind of completely new Green Silicon deoxidation alloying skill
Art.Realize inexpensive green manufacturing, CO2Zero-emission, reaches energy-saving and environment-friendly purpose, and social and economic benefits are huge.
In order to achieve the above object, the present invention is realized using following technical scheme：
Slag ionic theory shows that molten oxide is a kind of electrolyte with ionic conductivity, it contains anion
Or anion radical (such as oxonium ion and conclusion have the anion radical of oxonium ion) and cation etc..The theory of molten oxide point
Voltage value is solved, can be measured by the potential of corresponding primary battery, can also be calculated and be acquired by thermodynamic data.Its principle is：
Compound decomposes required electric energy and is numerically equal to its free energy of formation at constant pressure, but symbol is on the contrary, i.e.：
△GT θ=-nFET θ
In formula, ET θTheoretical decomposition voltage under-standard state, V；F-Faraday constant, 96487C/mol electronics；n—
Receiving and losing electrons number in reaction equation；△GT θReaction normal free energy change value under-constant pressure, J/mol.It is computed SiO2Decompose electricity
Pressure is 1.49V.
By electrochemical principle it is found that melting compound (applying direct current electric field, electricity under conditions of certain electrochemical reaction
Pole) electroreduction reaction can occur, accordingly, the electric field force suitable for molten silicon peroxide breaks down can be selected, enable it that electricity occurs
Reduction reaction is solved, sees reaction equation (1).
Si4++ 4e=Si(L) (1)
If anode selection is inert material, anode is not involved in cell reaction, obtains O2, and generated in cathode interface single
The reaction equation of matter Si, electrolytic reduction process is：
SiO2(L)=Si(L)+O2(g) (2)
Following reaction can be specifically decomposed into：
Si4++ 4e=Si(L)(cathode reaction)
2O2-=O2(g)+ 4e (anode reaction)
The present invention is exactly to utilize this principle, applies one surely by being placed in the anode in slag and being placed between the cathode in molten steel
Fixed DC electric field is reacted to make fused silica that electroreduction occur, and produces elemental silicon and oxygen, elemental silicon directly dissolve in steel
Liquid achievees the purpose that deoxidation alloying.
A method of deoxidation alloying being carried out with silicon oxide-containing material, this method is that the material of silicon oxide-containing is added to melt
In slag, apply a DC electric field by being placed in the inert anode in slag and being placed between the cathode in molten steel, it is anti-to carry out electrochemistry
It answers, by silica electroreduction, the silicon after reduction enters molten steel, and the oxygen in silica with inert anode then by occurring anode
Reaction is discharged into air in the form of oxygen.
Include the following steps：
1) tapping process controls：Converter slag-resisting is tapped, and lime, silicon oxide-containing material is added to molten steel in tapping process, in vain
The addition of ash and silicon oxide-containing material is by respective CaO and SiO in this two kinds of materials2Content is added, and makes this two kinds of material adductions
CaO afterwards and SiO2Weight ratio be CaO/SiO2=0.5~1.5, material overall control is added in 5~20Kg/ tons of steel.
2) electroreduction reaction controlling：Ladle is transported to electrolysis processing station, using cell reaction control device to slag
Molten steel system applies electric field and carries out cell reaction control, and specific control process is as follows：Anode is placed in ladle in slag first,
Anode position in slag is controlled, avoids contacting with molten steel；Cathode is placed in molten steel；Anode passes through conducting wire and DC power supply
Anode connection, cathode are connected by the cathode of conducting wire and DC power supply, then apply direct current from DC power supply to anode and cathode
Electric field carries out cell reaction.
The direct current power source voltage control is 100A~2000A in 1.5~5V, output current I, and can be in slag and sun
Pole reaction interface generates 200A/m2~4000A/m2Current density.
The silicon oxide-containing material is SiO2Weight percent content is more than 35%, CaO weight percent contents and is less than
50% compound or mixture.
A kind of cell reaction control device that the method carrying out deoxidation alloying with silicon oxide-containing material uses, including direct current
Power control, cathode lifting device, anode, cathode lifting device, cathode, ladle；The side of the ladle is provided with sun
Pole lifting gear, is equipped with anode on cathode lifting device, and anode is inserted in the slag in ladle by cathode lifting device；
The other side of ladle is provided with cathode lifting device, and cathode is equipped on cathode lifting device, and cathode lifting device inserts cathode
Enter in molten steel ladle；Anode and cathode connects DC power control device by conducting wire.
The cathode is inside and outside two layers of composite construction, outer layer be high temperature resistant, resistance to slag corrosion insulating materials, it is internal
Shape for high temperature resistant conductive material, the cathode is cylinder.
The anode is refractory metal ceramics or refractory metal, and shape is cylinder or tablet, and anode quantity is one
More than a.
Cathode outer layer is refractory ceramics or high temperature resistant cement, and cathode internal is graphite, cermet or refractory metal.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of method and device carrying out deoxidation alloying with silicon oxide-containing material, this method application electric field melt silica
Melt electroreduction and completes deoxygenation of liquid steel alloying.I.e. after pneumatic steelmaking, appropriate silicon oxide-containing material is added into slag,
Using molten steel as cathode, applies a DC electric field by being placed between the inert anode in slag and cathode, carry out the melting of silica
Electroreduction reacts, and the Si reduction in silica is entered molten steel and achievees the purpose that deoxidation alloying, and the oxygen in silica is then
Air is discharged into the form of oxygen by the way that anode reaction occurs with inert anode.
Carry out the reduction of silica fusion electrolysis using the present invention and complete deoxidation alloying, oxidation can be made by technique
Silicon fusion electrolysis restores, and can also increase the simple substance of certain content to molten steel while superfluous free oxygen in completing removing molten steel
Silicon.Compared with other deoxidation alloying technologies and equipment, apparatus of the present invention constitute it is simple, it is easy to operate, utilize silica, that is, complete
At cost-efficiently deoxidation alloying purpose, it is a kind of green deoxidation alloying technology of completely new low cost, may be implemented
CO2Zero-emission achievees the purpose that low-carbon environment-friendly, social and economic benefits are huge.
Description of the drawings
Fig. 1 is the structural schematic diagram of the cell reaction control device of the present invention.
In figure：1- cathode lifting devices, 2- anodes, 3- slags, 4- molten steel, 5- ladles, 6- cathode lifting devices, 7- are cloudy
Pole, 8- DC power control devices.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
See Fig. 1, a method of deoxidation alloying being carried out with silicon oxide-containing material, this method is by suitable silicon oxide-containing
Material be added in slag (molten slag), apply one by being placed in the inert anode in slag and being placed between the cathode in molten steel
DC electric field is electrochemically reacted, and by silica electroreduction, the silicon after reduction enters molten steel, and the oxygen in silica is then
Air is discharged into the form of oxygen by the way that anode reaction occurs with inert anode.
Include the following steps：
1) tapping process controls：Converter slag-resisting is tapped, and lime, silicon oxide-containing material is added to molten steel in tapping process, in vain
The addition of ash and silicon oxide-containing material is by respective CaO and SiO in this two kinds of materials2Content is added in right amount, makes this two kinds of materials
CaO after adduction and SiO2Weight ratio be CaO/SiO2=0.5~1.5, if CaO/SiO in silicon oxide-containing material2It conforms to
It asks, does not then have to add lime, material overall control is added in 5~20Kg/ tons of steel.
2) electroreduction reaction controlling：Ladle is transported to electrolysis processing station, using cell reaction control device to slag
Molten steel system applies electric field and carries out cell reaction control, and specific control process is as follows：Anode 2 is placed in slag 3 in ladle first
In, the position in slag 3 of anode 2 is controlled, avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4；Anode 2 by conducting wire with
DC power supply anode connection, cathode 7 by the cathode of conducting wire and DC power supply connect, then from DC power supply to anode 2 with
Cathode 7 applies DC electric field and carries out cell reaction.
The direct current power source voltage control is 100A~2000A in 1.5~5V, output current I, and can be in slag and sun
Pole reaction interface generates 200A/m2~4000A/m2Current density.
The silicon oxide-containing material is SiO2Weight percent content is more than 35%, CaO weight percent contents and is less than
50% compound or mixture.
A kind of cell reaction control device that the method carrying out deoxidation alloying with silicon oxide-containing material uses, including direct current
Power control 8, cathode lifting device 1, anode 2, cathode lifting device 6, cathode 7, ladle 5；The side of the ladle 5 is set
It is equipped with cathode lifting device 1, anode 2 is installed on cathode lifting device 1, anode 2 is inserted in ladle by cathode lifting device 1
In slag 3 in 5；The other side of ladle 5 is provided with cathode lifting device 6, and cathode 7, cathode are equipped on cathode lifting device 6
Cathode 7 is inserted in ladle 5 in molten steel 4 by lifting gear 6；Anode 2 connects DC power control device with cathode 7 by conducting wire
8。
The cathode 7 is inside and outside two layers of composite construction, outer layer be high temperature resistant, resistance to slag corrosion insulating materials, it is interior
Portion is high temperature resistant conductive material, and the shape of the cathode 7 is cylinder.
The anode 2 is refractory metal ceramics or refractory metal, and shape is cylinder or tablet, and anode quantity is one
More than a.
7 outer layer of cathode is refractory ceramics or high temperature resistant cement, and 7 inside of cathode is graphite, cermet or high temperature resistant gold
Belong to.
The output power maximum 100KVA of DC power control device, it is 0~50V, output current 0 that can provide voltage
~2000A.Lime is conventional metallurgical lime.
Embodiment 1：
Referring to Fig. 1, cell reaction control device include cathode lifting device 1, anode 2, ladle 5, cathode lifting device 6,
Cathode 7 and DC power control device 8.5 upper left position of ladle is provided with a cathode lifting device 1；The anode lifting
Refractory metal molybdenum ceramic anode 2 is installed, quantity is 4, and anode 2 is inserted in slag 3 on device 1；Cathode lifting device 1
The depth that slag 3 can be inserted into anode 2 is adjusted, and ensures that anode 2 and slag 3 contact and the contact of molten steel 4 of getting along well；On ladle 5
The square other side is provided with a cathode lifting device 6, and cathode 7 is equipped on the cathode lifting device 6, and cathode 7 is multiple inside and outside two layers
The cylinder of structure is closed, it is graphite rod that outer layer covers, which have high temperature resistant cement, inside,；Cathode 7 is inserted in molten steel 4；Cathode lifts
The lifting travel of cathode 7 can be adjusted in device 6, ensure that cathode 7 passes through slag 3 and molten steel 4 to contact and can adjust cathode 7
Depth in molten steel 4；Anode 2 and cathode 7 are connected to positive and negative on DC power control device 8 by conducting wire
Pole.
Silicon oxide-containing material used in the present embodiment is river sand, and ingredient is as shown in table 1；
1 river sand main chemical compositions wt% of table
Granule lime ingredient used in the present embodiment is as shown in table 2.
2 granule lime main chemical compositions wt% of table
Anode is refractory metal molybdenum ceramics, and shape is cylinder, and appearance and size is Φ 300mm × 1000mm；
Cathode is the cylinder of inside and outside two layer composite structure, and outer layer covers have the high temperature resistant cement protective layer of thickness 30mm, interior
Portion is high purity graphite material, diameter of phi 200mm；Cathode overall dimensions are Φ 260mm × 1500mm.
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
102 tons of converter molten steel weight, smelting endpoint C content are 0.036% (weight percent), and terminal oxygen content is 0.071% (weight
Percentage), 1702 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and granule lime and river is added to molten steel in tapping process
Sand, granule lime addition are 10Kg/ tons of steel, and the addition of river sand is 10Kg/ tons of steel, and addition material total amount is 20Kg/ tons of steel；
CaO/SiO after this two kinds of material adductions2=1.04 (weight percent ratios).
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in ladle 5 in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4
In；Anode 2 is connected by the anode of conducting wire and DC power supply, and cathode 7 is connected by the cathode of conducting wire and DC power supply, then by
DC power supply applies DC electric field to anode 2 and cathode 7 and carries out cell reaction, and direct current power source voltage is controlled in 5V, output current I
For 1800~2000A, and 3600~4000A/m can be generated in slag 3 and 2 reaction interface of anode2Current density is (due to electrolysis
Molten steel includes that slag is slightly sprung up in the process, therefore electrode also has small size variation with slag contacts interface, cause current density be
It is fluctuated within the scope of this).Implementation result is as shown in table 5.
Embodiment 2：
The present embodiment electrolysis special Reaction Control Assembly is the same as embodiment 1.
Silicon oxide-containing material used in the present embodiment is wollastonite, and ingredient is as shown in table 3；
3 wollastonite main chemical compositions wt% of table
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
101 tons of converter molten steel weight, smelting endpoint C content are 0.071%, and molten steel terminal oxygen content is 0.035% (weight percent),
1697 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and wollastonite is added to molten steel in tapping process；Wollastonite addition is
8Kg/ tons of steel；Due to CaO/SiO in wollastonite2=0.9, it meets the requirements, does not then have to add granule lime.
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in ladle 5 in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4
In；Anode 2 is connected by the anode of conducting wire and DC power supply, and cathode 7 is connected by the cathode of conducting wire and DC power supply, then by
DC power supply applies DC electric field to anode 2 and cathode 7 and carries out cell reaction, and direct current power source voltage control is in 2.3V, output electricity
Stream I is 800~1100A, and can generate 1600~2200A/m in slag and anode reaction interface2Current density is (due to electrolysis
Molten steel includes that slag is slightly sprung up in the process, therefore electrode also has small size variation with slag contacts interface, cause current density be
It is fluctuated within the scope of this).Implementation result is as shown in table 5.
Embodiment 3：
The present embodiment electrolysis special Reaction Control Assembly is the same as embodiment 1.
Silicon oxide-containing material used in the present embodiment is high slag, and ingredient is as shown in table 4；
4 high slag main chemical compositions wt% of table
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
103 tons of converter molten steel weight, smelting endpoint C content are 0.064%, and molten steel terminal oxygen content is 0.045% (weight percent),
1707 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and high slag, addition 15Kg/ is added to molten steel in tapping process
Ton steel；Due to CaO/SiO in high slag2=1.1, it meets the requirements, does not then have to add granule lime.
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4；Anode 2
It is connected by the anode of conducting wire and DC power supply, cathode 7 is connected by the cathode of conducting wire and DC power supply, then by DC power supply
Apply DC electric field to anode 2 and cathode 7 and carry out cell reaction, direct current power source voltage control is 800 in 3.8V, output current I
~1000A, and 1600~2000A/m can be generated in slag 3 and 2 reaction interface of anode2Current density is (due in electrolytic process
Molten steel includes that slag is slightly sprung up, therefore electrode also has small size variation with slag contacts interface, and it is in this range to lead to current density
Interior fluctuation).Implementation result is as shown in table 5
Embodiment 4：
The present embodiment electrolysis special Reaction Control Assembly is the same as embodiment 1.
Silicon oxide-containing material used in the present embodiment is river sand, and ingredient is shown in Table 1.
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
99 tons of converter molten steel weight, smelting endpoint C content are 0.085%, and molten steel terminal oxygen content is 0.030%, (weight percent),
1685 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and granule lime is added to molten steel in tapping process and river sand, granule are white
Grey addition is 4Kg/ tons of steel, and the addition of river sand is 8Kg/ tons of steel, and addition material total amount is 12Kg/ tons of steel；This two kinds of materials
CaO/SiO after adduction2=0.52 (weight percent ratio).
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4；Anode 2
It is connected by the anode of conducting wire and DC power supply, cathode 7 is connected by the cathode of conducting wire and DC power supply, then by DC power supply
Apply DC electric field to anode 2 and cathode 7 and carry out cell reaction, direct current power source voltage control is 300 in 1.5V, output current I
~500A, and 600~1000A/m can be generated in slag 3 and 2 reaction interface of anode2Current density is (due to steel in electrolytic process
Liquid includes that slag is slightly sprung up, therefore electrode also has small size variation with slag contacts interface, and it is within this range to lead to current density
Fluctuation).Implementation result is as shown in table 5
Embodiment 5：
The present embodiment electrolysis special Reaction Control Assembly is the same as embodiment 1.
Silicon oxide-containing material used in the present embodiment is river sand and wollastonite, wherein river sand at as shown in table 1, wollastonite at
Divide as shown in table 3.
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
105 tons of converter molten steel weight, smelting endpoint C content are 0.10%, and molten steel terminal oxygen content is 0.023% (weight percent),
1692 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and river sand and wollastonite is added to molten steel in tapping process.River sand is added
Amount is 1Kg/ tons of steel；The addition of wollastonite is 4Kg/ tons of steel, and addition material total amount is 5Kg/ tons of steel；After this two kinds of material adductions
CaO/SiO2=0.73 (weight percent ratio).
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4；Anode 2
It is connected by the anode of conducting wire and DC power supply, cathode 7 is connected by the cathode of conducting wire and DC power supply, then by DC power supply
Apply DC electric field to anode 2 and cathode 7 and carry out cell reaction, direct current power source voltage control is 100 in 1.8V, output current I
~200A, and 200~400A/m can be generated in slag 3 and 2 reaction interface of anode2Current density is (due to steel in electrolytic process
Liquid includes that slag is slightly sprung up, therefore electrode also has small size variation with slag contacts interface, and it is within this range to lead to current density
Fluctuation).Implementation result is as shown in table 5.
Embodiment 6：
The present embodiment electrolysis special Reaction Control Assembly is the same as embodiment 1.
Silicon oxide-containing material used in the present embodiment is high slag, and ingredient is shown in Table 4.
On 100t ladles deoxidation alloying operation is carried out using this electrolysis special reaction controlling.Overall control technique is：
106 tons of converter molten steel weight, smelting endpoint C content are 0.041%, and molten steel terminal oxygen content is 0.069% (weight percent),
1712 DEG C of smelting endpoint molten steel temperature；Converter slag-resisting is tapped, and high slag and granule lime, Gao Rong is added to molten steel in tapping process
Slag addition is 8.5Kg/ tons of steel, and granule lime addition is 1.5Kg/ tons of steel；Addition material total amount is 10Kg/ tons of steel；This two
CaO/SiO after kind material adduction2=1.50 (weight percent ratios).
Electric field is applied to slag molten steel system using cell reaction control device and carries out cell reaction control.First by anode
2 are placed in slag 3, and control anode 2 position in slag 3 avoids contacting with molten steel 4；Cathode 7 is placed in molten steel 4；Anode 2
It is connected by the anode of conducting wire and DC power supply, cathode 7 is connected by the cathode of conducting wire and DC power supply, then by DC power supply
Apply DC electric field to anode 2 and cathode 7 and carry out cell reaction, direct current power source voltage control is 1300 in 4.2V, output current I
~1500A, and 2600~3000A/m can be generated in slag 3 and 2 reaction interface of anode2Current density is (due in electrolytic process
Molten steel includes that slag is slightly sprung up, therefore electrode also has small size variation with slag contacts interface, and it is in this range to lead to current density
Interior fluctuation).Implementation result is as shown in table 5
5 silicon oxide-containing slag fusion electrolysis deoxidation alloying implementation result of table
Claims (8)
1. a kind of method carrying out deoxidation alloying with silicon oxide-containing material, which is characterized in that this method is by silicon oxide-containing
Material is added in slag, applies a DC electric field by being placed in the inert anode in slag and being placed between the cathode in molten steel, into
Row electrochemical reaction, by silica electroreduction, the silicon after reduction enters molten steel, and the oxygen in silica is then by positive with inertia
Pole is occurred anode reaction and is discharged into air in the form of oxygen.
2. a kind of method carrying out deoxidation alloying with silicon oxide-containing material according to claim 1, which is characterized in that packet
Include following steps：
1) tapping process controls：Converter slag-resisting is tapped, and is added lime, silicon oxide-containing material to molten steel in tapping process, lime and
The addition of silicon oxide-containing material presses respective CaO and SiO in this two kinds of materials2Content is added, after making this two kinds of material adductions
CaO and SiO2Weight ratio be CaO/SiO2=0.5~1.5, material overall control is added in 5~20Kg/ tons of steel；
2) electroreduction reaction controlling：Ladle is transported to electrolysis processing station, using cell reaction control device to slag molten steel
System applies electric field and carries out cell reaction control, and specific control process is as follows：Anode is placed in ladle in slag first, is controlled
Anode position in slag avoids contacting with molten steel；Cathode is placed in molten steel；The anode that anode passes through conducting wire and DC power supply
Connection, cathode are connected by the cathode of conducting wire and DC power supply, then apply DC electric field from DC power supply to anode and cathode
Carry out cell reaction.
3. a kind of method carrying out deoxidation alloying with silicon oxide-containing material according to claim 2, which is characterized in that institute
It is 100A~2000A that direct current power source voltage control, which is stated, in 1.5~5V, output current I, and can be in slag and anode reaction interface
Generate 200A/m2~4000A/m2Current density.
4. a kind of method carrying out deoxidation alloying with silicon oxide-containing material according to claim 2, which is characterized in that institute
The silicon oxide-containing material stated is SiO2Weight percent content is more than the chemical combination that 35%, CaO weight percent contents are less than 50%
Object or mixture.
5. it is a kind of claim 1-4 its any one of as described in the method for carrying out deoxidation alloying with silicon oxide-containing material adopt
Cell reaction control device, which is characterized in that including DC power control device, cathode lifting device, anode, cathode liter
Falling unit, cathode, ladle；The side of the ladle is provided with cathode lifting device, and anode is equipped on cathode lifting device,
Anode is inserted in the slag in ladle by cathode lifting device；The other side of ladle is provided with cathode lifting device, cathode liter
Cathode is installed, cathode is inserted in molten steel ladle by cathode lifting device on falling unit；Anode and cathode is connected by conducting wire
Connect DC power control device.
6. cell reaction control device according to claim 5, which is characterized in that the cathode is to answer for inside and outside two layers
Close structure, outer layer be high temperature resistant, resistance to slag corrosion insulating materials, inside be high temperature resistant conductive material, the shape of the cathode
For cylinder.
7. cell reaction control device according to claim 5, which is characterized in that the anode is made pottery for refractory metal
Porcelain or refractory metal, shape are cylinder or tablet, and anode quantity is more than one.
8. cell reaction control device according to claim 6, which is characterized in that cathode outer layer is refractory ceramics or resistance to
High-temperature cement, cathode internal are graphite, cermet or refractory metal.
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| CN102912081A (en) * | 2012-10-23 | 2013-02-06 | 鞍钢股份有限公司 | Method for processing molten steel and improving cleanliness of steel by aid of external electric field |
| CN203807569U (en) * | 2014-04-11 | 2014-09-03 | 鞍钢股份有限公司 | Electrolytic reaction control device for degrading slag oxidability |
| CN104975132A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method of reducing oxidability of furnace slag with application of electric field |
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2018
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| CN102912081A (en) * | 2012-10-23 | 2013-02-06 | 鞍钢股份有限公司 | Method for processing molten steel and improving cleanliness of steel by aid of external electric field |
| CN104975132A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method of reducing oxidability of furnace slag with application of electric field |
| CN203807569U (en) * | 2014-04-11 | 2014-09-03 | 鞍钢股份有限公司 | Electrolytic reaction control device for degrading slag oxidability |
| CN206328424U (en) * | 2016-05-19 | 2017-07-14 | 海城市欣锐铸件有限公司 | A kind of extra electric field tundish slag device for deoxidizing |
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