CN107217124A - The smelting process and its production technology of a kind of electrical sheet - Google Patents
The smelting process and its production technology of a kind of electrical sheet Download PDFInfo
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- CN107217124A CN107217124A CN201710389666.4A CN201710389666A CN107217124A CN 107217124 A CN107217124 A CN 107217124A CN 201710389666 A CN201710389666 A CN 201710389666A CN 107217124 A CN107217124 A CN 107217124A
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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
- C21C7/10—Handling in a vacuum
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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
-
- 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
- C21C7/068—Decarburising
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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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- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of smelting process of electrical sheet and its production technology, belong to net steel smelting technical field.The molten steel of the present invention is transported to RH refinery practices after the completion of converter smelting, and recyclegas flow is 100 300Nm3/h；RH refining latter stages add cleanser into molten steel, wherein controlling the electrical sheet target component to be：C≤0.003%, Si：0.7~1.0%, Mn：0.2~0.3%, P≤0.03%, S≤0.005%, described cleanser include active principle and bonding component, and active principle and the mass ratio for binding component are (5~10)：1.The present invention by being pre-processed in molten iron, converter smelting, RH refinery practices, and adding in cleanser, molten steel that remaining inclusion size is smaller, be evenly distributed into molten steel, remaining field trash passes through denaturation treatment substantially, the clean-up effect of molten steel is improved, electrician's steel cleanness is improved.
Description
Technical field
The invention belongs to clean steel technical field of smelting, a kind of smelting process more specifically to electrical sheet and its
Production technology.
Background technology
With the development of society, the continuous improvement of human demand, people propose higher requirement to ferrous materials, with electricity
Exemplified by work steel, electrical sheet electric power, electronics and the indispensable important soft magnetic alloy of war industry are also the maximum metal work(of yield
Energy material, is mainly used as the iron core of various motors, generator and transformer.
" Iron ＆ Steel Material of New Generation " is characterized in that Ultra-fine Grained, high-cleanness and height are uniform (high homogeneous), its R＆D target be
Manufacturing cost does not increase substantially, less with alloy resource and the energy, and intensity is doubled and made under the conditions of plasticity and toughness are not reduced substantially
Be doubled with the life-span.The performance of steel depends primarily on the chemical composition and tissue of steel.The presence of steel inclusion, destroys steel matrix
Continuity, the inhomogeneities of the tissue of steel is caused, to the ductility of steel, intensity, toughness, fatigue behaviour, finish, corrosion-resistant
Performance, welding performance and electromagnetic performance can all have a huge impact.Nozzle clogging, mouth of a river knot can be also caused in casting process
Production and slab quality of the knurl to casting process have a great impact.Therefore various countries steel research person puts into larger energy and is directed to
The research that steel inclusion is removed, also achieves huge achievement in terms of research in terms of field trash.
The presence of steel inclusion, destroys the continuity of steel matrix, causes the inhomogeneities of the tissue of steel, steel is prolonged
Malleability, intensity, toughness, fatigue behaviour, finish, decay resistance, welding performance and electromagnetic performance can all produce very big
Influence.Nozzle clogging can be also caused in casting process, production and slab quality of the nozzle clogging to casting process have very big shadow
Ring.Therefore various countries steel research person puts into the research that larger energy is directed to steel inclusion removal, is studied in terms of field trash
Aspect also achieves huge achievement.The removal to field trash typically has two aspects both at home and abroad：One is Countermeasures, and two are
Processing is modified to field trash.Technology controlling and process is by optimizing the technique of steel in process of production, being mingled with so as to reduce in steel
The content of thing.The quantity of slag under the oxygen content of reduction converter terminal, reduction, carries out ladle in refining process in converter steelmaking process
The content of steel inclusion is reduced in Argon, casting process using molding casting.In addition, steel mill is constantly changing always both at home and abroad
Enter and processing is modified to field trash, to improve the cleanliness factor of steel；But, cleanser is to molten steel purifying during RH is refined
Effect is limited, and urgent need develops a kind of method of use agent for purifying molten steel refining liquid steel.
Through retrieval, Publication No. CN103642989A patent of invention proposes a kind of agent for purifying molten steel (applying date：
2013-11-21), the parts by weight of each component are respectively：CaO：57~63 parts, Al2O3：31~36 parts, SiO2：5~10 parts,
CaF2：6~8 parts, MAI：4~11 parts, 3~40 parts of deoxidier.The invention improves the mobility of clinker, purifies to a certain extent
Molten steel, reduces inclusion content in molten steel, but this scheme of the invention is not modified place to the field trash in RH refining process
Reason, and the fusing point of microinclusions in steel can not be reduced during refining, it is impossible to promote well the growing up of field trash,
Float, remove, be unfavorable for further improving the quality of product made from steel.
In addition, innovation and creation is entitled：The molten steel scavenger and production method (application number of a kind of composite sphere form：
201410715201.X the applying date：2014-11-28), molten steel scavenger takes the form of a kind of composite sphere, composite sphere by
Pelletizing core and shell are constituted, and pelletizing core is metal material, shell is carbonate, and pelletizing core is main by silicon, manganese, the alloyed powder of aluminium
Mixture is constituted, and shell is mainly by calcium carbonate, magnesium carbonate, sodium carbonate, calcium oxide, one kind of magnesia or mixed no more than three kinds
Compound is constituted.Present invention reduction entire oxygen content in the steel content, improves steel product quality, it is impossible to promote well the growing up, float of field trash,
Remove, the field trash during particularly refining is modified processing, and can not reduce micro- in steel during the refining
The fusing point of thin field trash, is unfavorable for further improving the quality of product made from steel.
The content of the invention
1. the invention technical problem to be solved
It is an object of the invention to overcome in the prior art, the problem of cleanliness factor that existing electrician smelts is poor there is provided
The smelting process and its production technology of a kind of electrical sheet；
The smelting process of a kind of electrical sheet provided, by after the completion of converter smelting, being transported to RH refinery practices, RH essences
Refining latter stage adds cleanser into molten steel, can improve the clean-up effect of molten steel, can improve the cleanliness factor of electrical sheet；Further
Ground, the mating reaction of active principle and bonding component, can improve the clean-up effect of molten steel, further, can promote folder
Debris is grown up, floated, removes, and then improves molten steel cleanness；
The production technology of a kind of electrical sheet provided, by after the completion of converter smelting, being transported to RH refinery practices, RH essences
Refining latter stage adds cleanser into molten steel, and protection is carried out during pouring and is poured, the quality of strand can be improved, reduction is mingled with
The generation of thing, can improve the cleanliness factor of electrical sheet.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
A kind of smelting process of electrical sheet of the present invention, controls during converter smelting the terminal molten steel component to be：C：
0.03%~0.05%, P≤0.02%, S≤0.003%, O≤600ppm；Molten steel is transported to RH essences after the completion of converter smelting
Sweetening process, RH vacuum≤67Pa, recyclegas flow is 100-300Nm3/h；RH refining latter stages add purification into molten steel
Agent, wherein controlling the electrical sheet target component to be：C≤0.003%, Si：0.7~1.0%, Mn：0.2~0.3%, P≤0.03%,
S≤0.005%, RH refinings terminate to complete electrician's steel smelting.
Preferably, specific smelting process is：
S100, molten iron pretreatment
S≤0.003%, molten iron temperature >=1350 DEG C before desiliconization are controlled when molten iron is pre-processed；
S200, converter smelting
Converter terminal molten steel is met：C:0.03%~0.05%, P≤0.02%, S≤0.003%, O≤600ppm, converter
Tapping temperature is 1630~1650 DEG C, and tapping process uses slag-stopping tapping, it is ensured that thickness of slag layer≤80mm；
S300, RH are refined
During RH is refined, deoxidier and alloy regulation molten steel component are added into molten steel, RH refines latter stage to molten steel
Middle addition cleanser, adds agent for purifying molten steel Posterior circle and stirs 4~6min, RH refinings terminate to complete electrician's steel smelting.
Preferably, in S200, converter steelmaking process, stove molten iron temperature >=1250 DEG C are entered, using the useless of low-sulfur low phosphorus content
Steel, S≤0.003%, P≤0.02% enters stove scrap ratio≤10%.
Preferably, in S300, RH refining process, recyclegas flow is 100-200Nm during carbonization treatment3At/h, decarburization
The time of reason is 10min, and carbonization treatment Posterior circle gas flow is 200-300Nm3/h。
Preferably, described cleanser includes the mass ratio of active principle and bonding component, active principle and bonding component
For (5~10)：1；Described active principle includes metallic aluminium, pulverized limestone, carborundum powder, titanium dioxide and biomass；Described
Adhesive component includes kaolin and sulfonated phenol formaldehyde resin.
Preferably, the active principle of cleanser also includes graphite powder, red beautiful soil and magnesium-manganese alloy.
Preferably, the active principle of cleanser is constituted according to following mass parts：50~70 parts of metallic aluminium, pulverized limestone 20~40
Part, 0~30 part of graphite powder, 5~20 parts of titanium dioxide, 5~15 parts of carborundum powder, 2~4 parts of biomass, red beautiful 0~1 part of soil, magnesium
0-2 parts of manganese alloy.
Preferably, the cleanser is form of spherical particles, and particle diameter is 5~10mm.
A kind of production technology of electrical sheet of the present invention, it is characterised in that：Using the smelting process smelting of above-mentioned electrical sheet
Refining obtains electrical sheet；Molten steel is poured, opens and long nozzle blowing argon casting is carried out when pouring, Argon pressure 0.1-0.2MPa,
Crystallizer protecting residue uses low-carbon and low-sulphur crystallizer protecting residue.
Preferably, the out-station temperature of electrical sheet is 1550~1560 DEG C when RH is refined.
3. beneficial effect
The technical scheme provided using the present invention, compared with existing known technology, with following remarkable result：
(1) the terminal molten steel component is controlled to be during the smelting process of a kind of electrical sheet of the invention, converter smelting：C：
0.03%~0.05%, P≤0.02%, S≤0.003%, O≤600ppm；Molten steel is transported to RH essences after the completion of converter smelting
Sweetening process, RH vacuum≤67Pa, recyclegas flow is 100-300Nm3/h；RH refining latter stages add purification into molten steel
Agent, wherein controlling the electrical sheet target component to be：C≤0.003%, Si：0.7~1.0%, Mn：0.2~0.3%, P≤0.03%,
S≤0.005%, by being pre-processed in molten iron, converter smelting, RH refinery practice, and adds cleanser into molten steel, improves
The clean-up effect of molten steel, improves electrician's steel cleanness；
(2) a kind of smelting process of electrical sheet of the invention, cleanser can promote steel inclusion removing and will not be right
Molten steel produces secondary pollution, and remaining inclusion size is smaller in the molten steel after the processing of this cleanser, be evenly distributed, and remaining
Field trash substantially pass through denaturation treatment, by active principle and bonding component mating reaction, the net of molten steel can be improved
Change effect；
(3) under the smelting process of a kind of electrical sheet of the invention, cleanser each component collective effect, reduce in molten steel
Oxidisability, can effectively facilitate field trash removing and inclusion conditioning in molten steel, high-melting-point field trash can be to low melting point inclususions
Thing changes, and is conducive to the removal of field trash, and remaining field trash passes through denaturation treatment, will not produce shadow to steel product performance
Ring, so as to improve the quality of molten steel；
(4) (FeO+MnO) in the smelting process of a kind of electrical sheet of the invention, refining slag reacts what is produced with cleanser
Fe and Mn enters molten steel, Al by slag interface2O3、SiO2Slag absorption is refined, so as to reduce oxidation of the refining slag to molten steel.
In clean steel smelting process, carborundum can react with the dissolved oxygen and oxide in molten steel, oxygen content in reduction molten steel, and
The CO gases that reaction is produced reduce the generation of solid-oxide, and CO gases float to remove further to be promoted to the stirring action of molten steel
The floating for having entered field trash is removed；
(5) a kind of smelting process of electrical sheet of the invention, the addition of cleanser can aoxidize most solid tufted
Aluminium, which is mingled with, to be become the calcium aluminates of low melting point richness CaO low melting points and is mingled with, and reduces dystectic tufted Al in steel2O3The content being mingled with,
And then by high-melting-point fragility Al2O3It is mingled with the field trash by modified generation low melting point, promotes inclusion floating, and easily aggregation
The MnS that grows up, which is mingled with, to be partly or entirely modified to tiny CaS and is mingled with, so that cleaning molten steel；
(6) production technology of a kind of electrical sheet of the invention, work is refined by after the completion of converter smelting, being transported to RH
Skill, RH refining latter stages add cleanser into molten steel, and protection is carried out during pouring and is poured, the quality of strand is improved, subtracts
The generation of few field trash, can improve the cleanliness factor of electrical sheet.
Brief description of the drawings
Fig. 1 is the scanning electron microscopic picture for the steel sample for being not added with cleanser；
Fig. 2 is the scanning electron microscopic picture of the steel sample of embodiments of the invention 1；
Fig. 3 is the scanning electron microscopic picture of the steel sample of embodiments of the invention 2；
Fig. 4 is the scanning electron microscopic picture of the steel sample of embodiments of the invention 4；
Fig. 5 is a kind of flow chart of the smelting process of electrical sheet of the present invention.
Embodiment
Hereafter the detailed description to the exemplary embodiment of the present invention with reference to accompanying drawing, one of accompanying drawing formation description
Point, show enforceable exemplary embodiment of the invention as example in the figure.Other embodiment can be achieved when understanding
And can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to embodiments of the invention
More detailed description be not limited to required the scope of the present invention, and just to be illustrated and do not limit
Description to the features of the present invention and feature, to propose the best mode for performing the present invention, and is sufficient so that people in the art
Member can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment can be more fully understood with reference to accompanying drawing, wherein the present invention
Element and feature are identified by reference.
Embodiment 1
As shown in figure 5, a kind of smelting process of electrical sheet of the present embodiment, specific step is as follows：
S100, molten iron pretreatment
Rate >=95% of skimming is controlled, S≤0.003%, molten iron temperature >=1350 DEG C before desiliconization are controlled when molten iron is pre-processed；This
The rate of skimming of embodiment is 96%, and molten iron controls S when pre-processing：0.003%, molten iron temperature is 1360 DEG C before desiliconization；
S200, converter smelting
Enter stove molten iron temperature >=1250 DEG C, the present embodiment is 1280 DEG C, using the steel scrap of low-sulfur low phosphorus content, S≤
0.003%, P≤0.02%, enter stove scrap ratio≤10%, and it into stove scrap ratio is 9% that the present embodiment, which is,.Smelting process whole process is low to blow
Argon gas or nitrogen, the present embodiment are argon gas, add deoxidier and carry out deoxidation, converter terminal molten steel is met：C:0.03%~
0.05%, P≤0.02%, S≤0.003%, O≤600ppm, Tapping Temperature of Bof are 1630~1650 DEG C, and tapping process is used
Slag-stopping tapping, it is ensured that thickness of slag layer≤80mm；The present embodiment converter terminal molten steel is met：C：0.04%, P：0.02%, S：
0.003%, O：500ppm, Tapping Temperature of Bof is 1640 DEG C, and tapping process uses slag-stopping tapping, it is ensured that thickness of slag layer is
75mm；
S300, RH are refined
RH before processings require vacuum tank temperature >=1300 DEG C, and vacuum equipment must be intact, and vacuum can reach below 67Pa
It can smelt.RH enters the station 1610~1630 DEG C of molten steel temperature, RH vacuum≤67Pa, and the present embodiment RH molten steel temperatures that enter the station are
1620 DEG C, RH vacuum is 60Pa；Recyclegas flow is 100-300Nm3/ h, circulating air when concrete operations are carbonization treatment
Body flow is 100-200Nm3/ h, the time of carbonization treatment is 10min, and carbonization treatment Posterior circle gas flow is 200-300Nm3/
h；During RH is refined, add deoxidier and alloy regulation molten steel component into molten steel, described deoxidier for aluminum shot or
The mixture of ferrosilicon, or both；The present embodiment use for aluminum shot；Alloy is metal alloy, and the present embodiment is manganeisen,
Added alloy must carry out baking processing in advance, and baking time is more than 30min.RH refining latter stages add purification into molten steel
Agent, the addition of cleanser is the 0.5-1.5% of quality of molten steel, and the present embodiment is 1%；Wherein control electrical sheet target component
For：C≤0.003%, Si：0.7~1.0%, Mn：0.2~0.3%, P≤0.03%, S≤0.005%, RH refine end
Into electrician's steel smelting.Add agent for purifying molten steel Posterior circle and stir 4~6min, the present embodiment is 5min, and RH refinings terminate to complete
Electrician's steel smelting, wherein the present embodiment control electrical sheet target component to be C：0.0025%, Si：0.8%, Mn：0.25%, P：
0.025%, S：0.0025%.
The cleanser used is graininess, and cleanser is form of spherical particles, and particle diameter is 5~10mm；Cleanser includes
The mass ratio of active principle and bonding component, active principle and bonding component is (5~10)：1, the present embodiment preferably 8:1, effectively
Component include metallic aluminium, pulverized limestone, carborundum powder, titanium dioxide and biomass, active principle press following mass parts metallic aluminium
50~70 parts, 20~40 parts of pulverized limestone, 5~20 parts of titanium dioxide, 5~15 parts of carborundum powder, 2~4 parts of biomass, the present embodiment
Choosing：Metallic aluminium 60kg, pulverized limestone 30kg, titanium dioxide 18kg, carborundum powder 15kg, biomass 3kg.
It is worth noting that：Each component in active principle is powdery, and granularity≤0.1mm, i.e. metallic aluminium, lime
Powder, titanium dioxide, carborundum powder are powdery, and granularity≤0.1mm of metallic aluminium, pulverized limestone, titanium dioxide, biomass, carbonization
Granularity≤0.05mm of silica flour.It is worth noting that：The biomass of the present embodiment be agriculture and forestry production process in remove grain, fruit
During the lignocellulosics such as stalk, trees in addition, farming industry leftover bits and pieces, agriculture and forestry organic waste material and Animal husbandry production
Fowl and animal excrement and discarded object.
Al content in the metallic aluminium of the present embodiment is more than 92%, and the present embodiment is 93%；The lime of the present embodiment is work
Property lime, its be 1100 DEG C of calcining heat obtain crystal grain is small, the lime that porosity is high, bulk density is small, and this implementation
The activity degree for the lime that example is used is in 330ml/4N-HCl.Carborundum powder is by silicon with carbon with the nonmetallic of Covalent bonding together
Carbide.The adhesive component of the present embodiment includes kaolin and sulfonated phenol formaldehyde resin, and adhesive component is constituted by following mass parts：It is high
60~80 parts of ridge soil, 20~40 parts of sulfonated phenol formaldehyde resin；The present embodiment is selected：Kaolin 70kg, sulfonated phenol formaldehyde resin 30kg.
Cleanser may be as follows to the reaction mechanism of molten steel purifying：Refine (FeO+MnO) content in latter stage refining slag general
1~3%, when FeO, MnO content in slag are higher, non-metallic inclusion will be produced, be unfavorable for improving the cleanliness factor of molten steel.
In clean steel smelting process, to reduce (FeO+MnO) and the generation of alloying element oxidation reaction in molten steel in refining, therefore have
The oxidisability of necessary further reduction refining slag.Cleanser is added in molten steel, following reaction can occur in molten steel for cleanser：
Al+3/2 (FeO)=1/2 (Al2O3)+3/2[Fe]
Al+3/2 (MnO)=1/2 (Al2O3)+3/2[Mn]
SiC+3 (FeO)=SiO2+CO↑+3[Fe]
SiC+3 [O]=SiO2+CO↑+3[Fe]
3(TiO2)+C=[Ti3O5]+CO
(FeO+MnO) in refining slag reacts the Fe produced with cleanser and Mn enters molten steel, Al by slag interface2O3、
SiO2Slag absorption is refined, so as to reduce oxidation of the refining slag to molten steel.In clean steel smelting process, carborundum can with molten steel
Dissolved oxygen and oxide react, reduction molten steel in oxygen content, and reaction produce CO gases reducing solid-oxide
Generation, CO gases, which float, to be removed the floating that field trash is further promoted to the stirring action of molten steel and removes.Moreover, in slag
Oxide promote at high temperature and oxidizing biomass and sulfonated phenol formaldehyde resin decompose generation H2、CH4, CO, and biomass reverse Ying Su
Degree is rapid, promotes the progress of subsequent reactions, improves the efficiency of reaction；H2、CH4[O] in slag can be reacted, so that directly
[O] content in molten steel is reduced, oxygen content is reduced to below 30ppm, and reduces the generation of deoxidation type inclusion, generation
Gas is stirred to molten steel, and forms small vacuum chamber in molten steel, so as to promote the floating of field trash, improves molten steel
Cleanliness factor；And the sulfonated phenol formaldehyde resin in adhesion component can improve molten steel in accelerator of the later stage as agitation of molten steel
Clean-up effect.And can be with TiO in biomass2Reaction, the Ti that above-mentioned reaction is produced3O5It is the atom of stable big ionic radius
Group, can adsorb other field trashes, and easily floating is refined slag Adsorption.In addition, the present invention by using pulverized limestone to folder
Debris carries out denaturation treatment, and pulverized limestone is more more stable than calcium metal at a temperature of steel-making, and do not allow it is volatile, do not decompose, and not
It can produce due to molten steel nitrogen pick-up caused by blowing process, can still keep total after deoxidation in the case where original molten steel oxygen gesture is very high
Oxygen content is relatively low.
The addition of pulverized limestone can make most solid tufted alumina inclusions become the aluminic acids of low melting point richness CaO low melting points
Calcium is mingled with, and reduces dystectic tufted Al in steel2O3The content being mingled with, and then by high-melting-point fragility Al2O3It is mingled with by modification
Generate the field trash of low melting point, promote inclusion floating, and easy agglomeration MnS is mingled with partly or entirely be modified to it is tiny
CaS is mingled with, so that cleaning molten steel, improves steel product quality.The scavenger metal aluminium of the present invention, carborundum powder, biomass can drop
Oxidisability in low molten steel and slag, and the gas that carborundum powder, biomass reverse should be generated is stirred to molten steel, promotes molten steel
In inclusion floating, promote steel inclusion float up to slag interface, at the same time cleanser enters to the field trash in molten steel
Row is modified, under cleanser each component collective effect of the present invention, is reduced the oxidisability in molten steel of knowing clearly, can be effectively facilitated molten steel
Middle field trash removing and inclusion conditioning, modified field trash turn into multilayered sphere, and field trash is tiny and is evenly distributed, high
Melting point inclusions can change to lower melting point inclusion, be conducive to the removal of field trash, and the molten steel in the presence of Gas Stirring
Middle remaining inclusion size is smaller, be evenly distributed, and the field trash of remaining passes through denaturation treatment substantially, will not be to steel product
Performance produces influence, so as to improve the quality of molten steel；Scanning electron microscopic picture after the cooling of steel sample is as shown in Figure 2.
The scanning electron microscopic picture of the present embodiment steel sample is as shown in Fig. 2 compared to the ESEM for the steel sample for being not added with cleanser
Picture is as shown in Figure 1；Further analysis is found, as shown in figure 1, the size of field trash is larger, and is not used in the steel of cleanser
The amount of inclusions is more, and field trash type is mainly dystectic tufted Al2O3It is mingled with.As shown in Fig. 2 at through agent for purifying molten steel
The amount of inclusions after reason in steel is less, and inclusion size is smaller.Experimental study shows the steel after being handled using agent for purifying molten steel
Middle inclusion content is significantly reduced, and steel inclusion is denatured, and the clean-up effect of molten steel is obvious.Using the net of embodiment 1
Remaining inclusion size is smaller in molten steel after agent processing, be evenly distributed, and the field trash of remaining passes through at denaturation substantially
Reason, will not produce influence to steel product performance.
The preparation method of the cleanser of the present embodiment, is comprised the following steps that：
Step one：Prepare bonding component
Kaolin 70kg and sulfonated phenol formaldehyde resin 30kg are weighed by mass parts to dry in drying box, are being stirred after the completion of drying
15~20min of mixing in machine is mixed, the present embodiment is 18min, it is well mixed to obtain binding component；
Step 2：Prepare active principle
Metallic aluminium 60kg, pulverized limestone 30kg, titanium dioxide 18kg, carborundum powder 15kg and biomass are weighed by mass parts
3kg is dried in drying box, stirs 25~30min in stirrer for mixing after the completion of drying, the present embodiment is 30min, mixing
Uniformly obtain active principle；
Step 3：Cleanser compound
Bonding component is added in the mixer of active principle, and active principle and the mass ratio of bonding component are 8:1,
Mixing completion is purified agent compound；
Step 4：Granulation
Cleanser compound is added in pelletizer, and is sprayed water into cleanser compound, cleanser compound roller press
In the presence of tool power, the bonding of cleanser compound, granulation obtain granular cleanser, and filter out particle diameter with round-hole mesh
For 5~10mm cleanser；The grain diameter of cleanser is 5~10mm, improves contact, mixing of the cleanser particle with molten steel
Effect, improves the kinetics of cleanser and molten steel, then will be incubated 1h at cleanser in confined conditions 70 DEG C；Then
Cleanser particle is dried to obtain cleanser in drying box, cleanser is sealed stand-by after cooling.The CaO during granulation
Modifying process is carried out to biomass, and then improves the intensity of cleanser particle, it is to avoid granule atomization, and biomass is in high temperature bar
Part is in the decomposition of the biomass under the promotion of metallic element, and carborundum powder, biomass and metallic aluminium collective effect reduce molten steel
In oxygen content, produce gas and accelerate the progress of reaction, carborundum powder, biomass can further produce gas and promote field trash
Float, pulverized limestone, carborundum powder, titanium dioxide improve the dynamic conditions for being mingled with refining process and floating and removing, and to folder
Debris is modified or adsorbed, so as to promote the inclusion floating in molten steel, further promotes the removal of field trash, subtracts
The content of few nonmetallic inclusionsin steel, improves the quality of molten steel.
A kind of production technology of electrical sheet of the present invention, is smelted using the smelting process of above-mentioned electrical sheet and obtains electrician
Steel, the out-station temperature of electrical sheet is 1550~1560 DEG C when RH is refined；Molten steel is poured, cast section be 230mm ×
1100mm, opens progress long nozzle blowing argon casting, Argon pressure 0.1-0.2MPa when pouring, the present embodiment is 0.15MPa, crystallization
Device covering slag uses low-carbon and low-sulphur crystallizer protecting residue.The cleanser of the present invention removes to field trash in molten steel and will not be secondary
The research of molten steel is polluted, the remaining inclusion size in the molten steel removed by the present invention is smaller, be evenly distributed, and the folder of remaining
Debris passes through denaturation treatment substantially, will not produce influence to steel part performance, and by whole process control, so as to improve
Produce the cleanliness factor and quality of electrical sheet.
Embodiment 2
The substance be the same as Example 1 of the present embodiment, difference is：Cleanser is graininess, and cleanser is spherical
Graininess, particle diameter is 5~10mm；Cleanser includes the matter of active principle and bonding component, active principle and bonding component
Amount is than being (5~10)：1, the present embodiment preferably 5:1.
Active principle in the present embodiment cleanser also includes graphite powder, red beautiful soil and magnesium-manganese alloy；Active principle according to
Following mass parts composition, 50~70 parts of metallic aluminium, 20~40 parts of pulverized limestone, 0~30 part of graphite powder, 5~20 parts of titanium dioxide, carbon
5~15 parts of SiClx powder, 2~4 parts of biomass, red beautiful 0~1 part of soil, 0-2 parts of magnesium-manganese alloy；The present embodiment is metallic aluminium 50kg, stone
Ashes 20kg, graphite powder 10kg, titanium dioxide 5kg, carborundum powder 5kg, biomass 4kg, red jade soil 1kg, magnesium-manganese alloy 2kg.
Cleanser particle is dried to obtain cleanser in drying box, cleanser is sealed stand-by after cooling.Steel sample is swept
Electron microscopic picture is retouched as shown in figure 3, compared to the scanning electron microscopic picture (as shown in Figure 1) for the steel sample for being not added with cleanser, using implementation
Remaining inclusion size is smaller in molten steel after the cleanser processing of example 2, be evenly distributed, and will not produce shadow to steel product performance
Ring.
The present invention further increases deoxidation effect, and this is probably due to metallic aluminium, graphite powder, biomass, carborundum, red
Beautiful soil and magnesium-manganese alloy powder collective effect promote the removing of the oxygen in molten steel, and on the one hand magnesium-manganese alloy powder has preferable deoxidation
Effect, and magnesium-manganese alloy powder further promotes the progress deoxidation of the materials such as metallic aluminium, biomass and carborundum, and graphite
The gas of powder, biomass and carborundum powder reaction generation is stirred to molten steel, the reaction production of red beautiful soil and titanium dioxide jointly
Thing is adsorbed to field trash, promotes the floating of field trash, and then improves the quality of molten steel.
Embodiment 3
The substance be the same as Example 1 of the present embodiment, difference is：The bonding component of cleanser also include starch and
Kaolin, bonding component is constituted according to following mass parts：60~80 parts of kaolin, 20~40 parts of sulfonated phenol formaldehyde resin, starch 0-
10 parts, 0-5 parts of oil-sand.The present embodiment is constituted according to following quality：Kaolin 80kg, sulfonated phenol formaldehyde resin 40kg, starch 5kg,
Oil-sand 2kg, the basic be the same as Example 1 of testing result of steel sample.Bind the work that starch and oil-sand in component play bonding in early stage
With simultaneously the later stage, it can participate in the deoxygenation in molten steel, and produce gas, so as to promote the floating of field trash, also improve
Deoxidation effectiveness.
Embodiment 4
The substance be the same as Example 2 of the present embodiment, difference is：Cleanser is graininess, and cleanser is spherical
Graininess, particle diameter is 5~10mm；Cleanser includes the matter of active principle and bonding component, active principle and bonding component
Amount is than being (5~10)：1, the present embodiment preferably 10:1.
Active principle in the present embodiment cleanser also includes urea, and described urea is graininess；The present embodiment is gold
Category aluminium 70kg, pulverized limestone 40kg, graphite powder 30kg, titanium dioxide 20kg, carborundum powder 15kg, biomass 2kg, red jade soil 1kg,
Magnesium-manganese alloy 1kg, urea 0.2kg.
Cleanser is added in stove in refining latter stage, the scanning electron microscopic picture of steel sample is as shown in figure 4, in molten steel after processing
Remaining inclusion size is smaller, be evenly distributed, and the field trash of remaining passes through denaturation treatment substantially, will not be to steel product
Influence can be produced.The present invention further increases deoxidation effect, and this is probably due to metallic aluminium, graphite powder, biomass, carbonization
Silicon, Chi Yutu, magnesium-manganese alloy powder and urea collective effect promote the removing of the oxygen in molten steel, and on the one hand magnesium-manganese alloy powder has
Preferable deoxidation effect, and magnesium-manganese alloy powder further promotes the materials such as metallic aluminium, biomass and carborundum and taken off
Oxygen, and the gas of graphite powder, biomass and carborundum powder reaction generation is stirred to molten steel, particularly urea meeting when heated
The rapid Ammonia material decomposed in generation analyte, analyte has stronger reproducibility, improves deoxidation effect, and reaction production
The gas that thing is produced is stirred to molten steel, promotes the floating of field trash.
Embodiment 5
The substance be the same as Example 2 of the present embodiment, difference is：Cleanser is graininess, and cleanser is spherical
Graininess, particle diameter is 5~10mm；Cleanser includes the matter of active principle and bonding component, active principle and bonding component
Amount is than being (5~10)：1, the present embodiment preferably 9:1.Active principle in the present embodiment cleanser also includes peat, the present embodiment
For metallic aluminium 70kg, pulverized limestone 40kg, graphite powder 30kg, titanium dioxide 20kg, carborundum powder 15kg, biomass 2kg, Chi Yutu
1kg, magnesium-manganese alloy 1kg, peat 1kg；The basic be the same as Example 2 of testing result of steel sample.
Using the cleanser of the present invention, in steel-making refining process, metallic aluminium, graphite powder, biomass, carbon in cleanser
SiClx, Chi Yutu, magnesium-manganese alloy powder and peat collective effect promote the removing of the oxygen in molten steel, and on the one hand magnesium-manganese alloy powder has
There is preferable deoxidation effect, and magnesium-manganese alloy powder further promotes the progress of the materials such as metallic aluminium, biomass and carborundum
Deoxidation, and graphite powder, biomass and carborundum powder reaction generation gas molten steel is stirred, improve deoxidation effect；This
Field trash removing and inclusion conditioning can be effectively facilitated in molten steel outside, modified field trash turns into multilayered sphere, it is tiny and
It is evenly distributed, high-melting-point field trash can change to lower melting point inclusion, is conducive to the molten steel after the removal of field trash, and processing
Middle remaining inclusion size is smaller, be evenly distributed, and the field trash of remaining passes through denaturation treatment substantially, will not be to steel product
Performance produces influence；In addition, the gas that reaction product is produced is stirred to molten steel, the floating of field trash is promoted.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
Various modifications and variations are carried out in the case of from the scope of the present invention being defined by the following claims.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
Fall into the scope of the present invention described here.In addition, background technology is intended to illustrate the Development Status and meaning of this technology,
It is not intended to limit the application field of the present invention or the application and the present invention.
Although more specifically, have been described herein the present invention exemplary embodiment, the invention is not limited in
These embodiments, but including those skilled in the art according to above detailed description it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.In claim
Restriction can widely be explained according to the language used in claim, and be not limited in foregoing detailed description or in reality
The example described during this application is applied, these examples are considered as nonexcludability.For example, in the present invention, term is " preferably
Ground " not exclusively, preferably, here it means that " but be not restricted to that ".It is in office where method or process claims
In any step for enumerating can perform and be not limited to the order proposed in claim in any order.Therefore, it is of the invention
Scope only should be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai
It is determined that.
Claims (10)
1. a kind of smelting process of electrical sheet, it is characterised in that control the terminal molten steel component to be during converter smelting：C：
0.03%~0.05%, P≤0.02%, S≤0.003%, O≤600ppm；Molten steel is transported to RH essences after the completion of converter smelting
Sweetening process, RH vacuum≤67Pa, recyclegas flow is 100-300Nm3/h；RH refining latter stages add purification into molten steel
Agent, wherein controlling the electrical sheet target component to be：C≤0.003%, Si：0.7~1.0%, Mn：0.2~0.3%, P≤0.03%,
S≤0.005%, RH refinings terminate to complete electrician's steel smelting.
2. a kind of smelting process of electrical sheet according to claim 1, it is characterised in that：Specifically smelting process is：
S100, molten iron pretreatment
S≤0.003%, molten iron temperature >=1350 DEG C before desiliconization are controlled when molten iron is pre-processed；
S200, converter smelting
Converter terminal molten steel is met：C:0.03%~0.05%, P≤0.02%, S≤0.003%, O≤600ppm, converter tapping
Temperature is 1630~1650 DEG C, and tapping process uses slag-stopping tapping, it is ensured that thickness of slag layer≤80mm；
S300, RH are refined
During RH is refined, deoxidier and alloy regulation molten steel component are added into molten steel, RH refining latter stages add into molten steel
Enter cleanser, add agent for purifying molten steel Posterior circle and stir 4~6min, RH refinings terminate to complete electrician's steel smelting.
3. a kind of smelting process of electrical sheet according to claim 2, it is characterised in that：In S200, converter steelmaking process,
Enter stove molten iron temperature >=1250 DEG C, using the steel scrap of low-sulfur low phosphorus content, S≤0.003%, P≤0.02%, enter stove scrap ratio≤
10%.
4. a kind of smelting process of electrical sheet according to claim 2, it is characterised in that：In S300, RH refining process, take off
Recyclegas flow is 100-200Nm during carbon processing3/ h, the time of carbonization treatment is 10min, carbonization treatment Posterior circle gas stream
Measure as 200-300Nm3/h。
5. a kind of smelting process of electrical sheet according to claim any one of 1-4, it is characterised in that：Described cleanser
Including active principle and bonding component, the mass ratio of active principle and bonding component is (5~10)：1；Described active principle bag
Include metallic aluminium, pulverized limestone, carborundum powder, titanium dioxide and biomass；Described adhesive component includes kaolin and sulfonated phenolic
Resin.
6. a kind of smelting process of electrical sheet according to claim 5, it is characterised in that：The active principle of cleanser is also wrapped
Include graphite powder, red beautiful soil and magnesium-manganese alloy.
7. a kind of smelting process of electrical sheet according to claim 6, it is characterised in that：The active principle of cleanser according to
Following mass parts composition：50~70 parts of metallic aluminium, 20~40 parts of pulverized limestone, 0~30 part of graphite powder, 5~20 parts of titanium dioxide, carbon
5~15 parts of SiClx powder, 2~4 parts of biomass, red beautiful 0~1 part of soil, 0-2 parts of magnesium-manganese alloy.
8. a kind of smelting process of electrical sheet according to claim 6 or 7, it is characterised in that：The cleanser is spherical
Graininess, particle diameter is 5~10mm.
9. a kind of production technology of electrical sheet, it is characterised in that：Using the smelting of the electrical sheet described in claim any one of 1-8
Method, which is smelted, obtains electrical sheet；Molten steel is poured, progress long nozzle blowing argon casting, Argon pressure 0.1- when pouring is opened
0.2MPa, crystallizer protecting residue uses low-carbon and low-sulphur crystallizer protecting residue.
10. a kind of production technology of electrical sheet according to claim 9, it is characterised in that：Electrical sheet goes out when RH is refined
Temperature of standing is 1550~1560 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113072384A (en) * | 2021-03-29 | 2021-07-06 | 安徽工业大学 | Novel oxide metallurgy process |
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| CN102051434A (en) * | 2010-12-31 | 2011-05-11 | 本钢板材股份有限公司 | Method for smelting silicon steel |
| CN103468907A (en) * | 2013-09-18 | 2013-12-25 | 济钢集团有限公司 | Method for producing cold-rolled non-oriented electrical steel based on ASP (AnGang Strip Production) medium thin slab continuous casting and rolling process |
| CN103509906A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Smelting method of non-oriented electrical steel plate with excellent magnetism |
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| CN1616686A (en) * | 2003-11-10 | 2005-05-18 | 勾子践 | Slag making agent of aluminium an calcium substance |
| CN102051434A (en) * | 2010-12-31 | 2011-05-11 | 本钢板材股份有限公司 | Method for smelting silicon steel |
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