CN107058867A - A kind of energy saving transformer iron core high Si pure iron and its production method - Google Patents
A kind of energy saving transformer iron core high Si pure iron and its production method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C21—METALLURGY OF IRON
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- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- 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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- 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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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/06—Making ferrous alloys by melting using master alloys
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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Abstract
The invention provides a kind of energy saving transformer iron core high Si pure iron and its production method, the chemical composition and weight/mass percentage composition of the high Si pure iron are as follows：C≤0.006%, Si：1.80~2.20%, Mn≤0.060%, P≤0.010%, S：0.006%, Alt≤0.004%, Ti≤0.003%, O≤0.006%, N≤0.005%, Ni≤0.020%, Cr≤0.030%, Cu≤0.020%, remaining is Fe and inevitable impurity, and production method includes molten iron pretreatment, converter smelting, the refining of LF stoves, RH stoves decarburized alloy, continuous casting working procedure.The production method of the present invention avoids the melting of user's later stage and adds metallic silicon, reduces more impurity elements and enters in steel, improves the electromagnetic performance of energy saving transformer iron core, meets user to cost reduction, the demand of increased quality.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to a kind of energy saving transformer iron core with high Si pure iron and its
Production method.
Background technology
Energy saving transformer belongs to the energy-saving product for substituting silicon steel transformer purposes, and iron core is used as main group of transformer
Into one of part, can the quality of its performance will directly influence transformer run to economic and reliable.Magnetic induction intensity is high, iron loss
Low is its important characteristic, and magnetic induction intensity represents the magnetizability of material, and the magnetic induction intensity of iron core is higher, exciting curent
（That is no-load current）Lower, copper loss and iron loss are all reduced, and can save electric energy.The magnetostriction of high magnetic strength iron core is low simultaneously, can be with
The noise of transformer is substantially reduced, environmental pollution is reduced.
Needed in the iron core production of general transformer using pure iron as raw material.Turn to ensure the performance of transformer, improving electric power
Efficiency is changed, downstream producer proposes higher requirement to pure iron as raw material composition, and S, P element will be lacked, and oxygen element is low, field trash will be waited less
Deng.And the resistivity and maximum permeability of iron, reduction coercivity, core loss can be improved by adding silicon（Iron loss）And magnetic aging, because
, it is necessary to continuously add substantial amounts of Si elements in pure iron as raw material in this follow-up smelting process, but it can bring miscellaneous to high Si iron core
The problem of prime element is raised.
Therefore need domestic steel mill's exploitation new material badly and meet its needs, the need for we are according to user, to subsequent user
Smelting technology analyzed, and from composition, Control and Inclusion Removal, technique process coordinate in terms of to steel grade production set
Meter optimization.Pure iron steel grade technique typically uses the technique of converter-RH stoves-continuous casting, and Xing Gang reasonably organizes work according to existing equipment
Skill route, employs the process route of converter-LF stoves-RH stoves-continuous casting blooms, and the high Si pure iron as raw material bloom of exploitation is kept away
Exempt from user subsequently to add too many Si elements and cause electromagnetic performance to decline, meet the use requirement of down-stream enterprise.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of energy saving transformer iron core high Si pure iron and its producer
Method, this method production high Si pure iron of Ultra-low carbon, meets user to reducing the demand of energy saving transformer iron core melting impurity content.
In order to solve the above technical problems, the present invention provides a kind of energy saving transformer iron core high Si pure iron, the high Si
The chemical composition and weight/mass percentage composition of pure iron are as follows：C≤0.006%, Si：1.80~2.20%, Mn≤0.060%, P≤
0.010%, S：0.006%, Alt≤0.004%, Ti≤0.003%, O≤0.006%, N≤0.005%, Ni≤0.020%, Cr≤
0.030%, Cu≤0.020%, remaining is Fe and inevitable impurity.
The present invention also provides a kind of above-mentioned energy saving transformer iron core production method of high Si pure iron, the production method
Including molten iron pretreatment, converter smelting, the refining of LF stoves, RH stoves decarburized alloy, continuous casting working procedure；The continuous casting working procedure, continuous casting is big
Square billet chemical composition and weight percentage are：C≤0.006%, Si：1.80~2.20%, Mn≤0.060%, P≤0.010%, S：
0.006%, Alt≤0.004%, Ti≤0.003%, O≤0.006%, N≤0.005%, Ni≤0.020%, Cr≤0.030%, Cu≤
0.020%, remaining is Fe and inevitable impurity.
S≤0.006% in hot metal pre process procedures of the present invention, pretreatment desulfurizing, control molten steel.
Converter smelting process of the present invention, converter smelting early stage uses deslagging technique, outwells the oxidizing slag containing high P, Mn；
Later stage draws technique of re-blowing, control molten steel C≤0.06%, liquid steel temperature≤1620 DEG C using high.
Converter smelting process of the present invention, tapping uses slide plate pushing off the slag, the lower quantity of slag of control, tapping Control for Oxygen Content≤
800ppm, pre-deoxidation is carried out using aluminium block, and aluminium block addition is 0.5-1.0kg/ tons of steel.
LF stoves refining procedure of the present invention, Oxygen Content in Liquid Steel≤500ppm after control is entered the station, is warming up to 1640~1660
DEG C, ladle bottom uses argon gas strong mixing.
LF stoves refining procedure of the present invention, heating finish progress determine oxygen operation, close Ladle Bottom blow, to the top of the slag on add
Enter refining ladle slag modifier+aluminum shot and carry out top slag transformation of the way operation, after reaction, dip in slag specimen observation clinker color, the green glass of finishing slag
FeO≤5.0% in glass slag or Transparent color, slag；The chemical composition and weight/mass percentage composition of refining ladle slag modifier be：CaO：20
~28%, Al2O3：23~30%, SiO2：2~8%, S：0~0.15%, P：0~0.05%, Al：37~43%.
RH stoves decarburized alloy chemical industry sequence of the present invention, LF stoves tapping molten steel is transported to RH stoves and carries out Decarburization Operation, after entering the station
Determine oxygen；Decarburization is carried out using OB techniques, OB uses full pumping application of vacuum, vacuum degree control≤100pa after starting；OB terminates
Afterwards, control decarburization circulation time >=8min, decarburization determines oxygen after terminating.
RH stoves decarburized alloy chemical industry sequence of the present invention, after decarburization terminates, adds micro- ferro-silicon-aluminium and carries out deoxidation alloying, plus
Enter amount for 30kg/ tons, molten steel dissolved oxygen content control≤30ppm, circulation 3-5min is pressed again, keep soft blow 4-6min.
Continuous casting working procedure of the present invention, after molten steel RH is leaving from station, upper conticaster is cast into 325mm × 280mm blooms, big bag
Protected using long nozzle, crystallizer carries out whole process protection cast using submersed nozzle, tundish temperature is controlled in 1540-1560
DEG C, pulling rate 0.7m/min, stopper argon blowing rate is in 50~80NL/h.
The mentality of designing of the present invention：
1. in order that user, which is saved in later stage fusion process, adds metallic silicon, it is to avoid more impurity elements enter in steel, carry
The high electromagnetic performance of energy saving transformer iron core, the present invention adds Si contents in pure iron as raw material steel, and si content can reach
1.80-2.20%, has reached cost reduction, the purpose of increased quality of down-stream enterprise's production energy saving transformer iron core.
2. employ molten iron pretreatment, converter deslagging, slide plate pushing off the slag, molten steel final deoxidizing to reduce impurity element in steel
Using micro- ferro-silicon-aluminium, the technological measure such as dissolved oxygen in higher steel, it is therefore an objective to go out pure high Si using above-mentioned technique productions pure
Iron square billet, meeting user reduces the demand of energy saving transformer iron core melting impurity content.
3. adding substantial amounts of micro- ferro-silicon-aluminium in the RH stove later stages, Alloying Treatment is carried out, high Si molten steel has been obtained, simultaneously
Other elements are not changed significantly.
4. being Al elements in reduction steel, continuous casting is carried out using the technique of half boiling steel containing oxygen more than needed in molten steel, is this
The transformation of the way of top slag has been carried out in LF, RH, it is to avoid wadding stream and bubble phenomenon that square billet casting with oxygen molten steel is produced.
5. in order to ensure the extremely low level of Al, Ti element in steel, therefore employ and deposited in incomplete deoxidation mode, steel
Oxygen is being partly dissolved, steel grade Al, Ti content is balanced, while without using micro- aluminium silicon containing Al, Ti during molten steel final deoxidizing
Iron, it is to avoid the rise of Al, Ti content in steel.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the invention provides energy saving transformer iron core use
The production method of high Si pure iron, using molten iron pretreatment desulfurizing, converter decarburization, LF desulfurization heating, the deep decarburizations of RH and alloying, is obtained
Arrive that carbon content is extremely low, the element such as S, P, Al, Ti, O, C, Mn is in relatively low content range, the higher pure iron production of Si compositions
Product.2nd, avoid the melting of user's later stage and add metallic silicon, reduce more impurity elements and enter in steel, improve energy-saving change
The electromagnetic performance of depressor iron core, meets user to cost reduction, the demand of increased quality.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
High Si pure iron chemical composition and weight percentage are：C：0.006%, Si：2.20%, Mn：0.060%, P：0.010%, S：
0.006%, Alt：0.004%, Ti：0.003%, O：0.006%, N：0.005%, Ni：0.020%, Cr：0.030%, Cu：0.020%,
Remaining is Fe and inevitable impurity.
The production method of the high Si pure iron square billet of the present embodiment includes molten iron pretreatment, converter smelting, LF stoves are refined, RH stoves take off
Carbon alloy, continuous casting working procedure, are comprised the following steps that：
1）Molten iron is pre-processed：Molten iron pretreatment desulfurizing, enters stove molten iron S：0.006%.
2）Converter smelting：80 tons of converter heat size, uses deslagging technique in converter smelting early stage, 1/2 is poured out after slag chargeization is good
Slag, continues to smelt；Later stage draws technique of re-blowing using high, and molten steel tapping uses slide plate pushing off the slag, the lower quantity of slag of control, Oxygen Content in Liquid Steel
800ppm, adds 0.5kg/ tons of steel of aluminium block and carries out pre-deoxidation, 1620 DEG C of molten steel tapping temperature, terminal composition：C：0.060%, Si：
0.002%, Mn：0.04%, S：0.006%, P：0.009%.
3）LF stoves are refined：After LF enters the station, Oxygen Content in Liquid Steel 500ppm is warming up to 1660 DEG C, ladle bottom is strong using argon gas
Stirring；Heating finishes progress and determines oxygen operation, and closes Ladle Bottom air blowing, is sprinkled into refining ladle slag modifier+aluminum shot to the top of the slag and enters
The slag transformation of the way operation of row top, after reaction, dips in slag specimen finishing slag for green glass slag, FeO is 5.0% in slag.Refining ladle slag modifier
Chemical composition and weight/mass percentage composition are：CaO：28%, Al2O3：30%, SiO2：8%, S：0.15%, P：0.05%, Al：43%.
4）RH decarburized alloys：The tapping molten steel of LF stoves is transported to RH stoves and carries out Decarburization Operation, and oxygen is determined after entering the station；Using OB works
Skill carries out decarburization, and OB uses full pumping application of vacuum, vacuum degree control 100pa after starting；After OB terminates, decarburization circulation time
8min, decarburization terminates to determine oxygen；After decarburization terminates, add the micro- ferro-silicon-aluminiums of 2400kg and carry out deoxidation alloying, measure molten steel dissolved oxygen
30ppm；Pressed again after circulation 3min, soft blow time 5min.
5) continuous casting：After molten steel RH is leaving from station, upper large square bland continuous-casting machine is cast into 325mm × 280mm blooms, and big bag is using length
The mouth of a river is protected, and crystallizer carries out whole process protection cast, 1560 DEG C of tundish temperature, pulling rate 0.7m/min, plug using submersed nozzle
Rod argon blowing rate obtains continuous casting blooms in 80NL/h；Continuous casting blooms chemical composition and weight percentage are：C：0.006%,
Si：2.20%, Mn：0.060%, P：0.010%, S：0.006%, Alt：0.004%, Ti：0.003%, O：0.006%, N：0.005%,
Ni：0.020%, Cr：0.030%, Cu：0.020%, remaining is Fe and inevitable impurity.
Embodiment 2
High Si pure iron chemical composition and weight percentage are：C：0.005%, Si：1.80%, Mn：0.050%, P：0.008%, S：
0.005%, Alt：0.003%, Ti：0.003%, O：0.005%, N：0.004%, Ni：0.015%, Cr：0.018%, Cu：0.017%,
Remaining is Fe and inevitable impurity.
The production method of the high Si pure iron square billet of the present embodiment includes molten iron pretreatment, converter smelting, LF stoves are refined, RH stoves take off
Carbon alloy, continuous casting working procedure, are comprised the following steps that：
1）Molten iron is pre-processed：Molten iron pretreatment desulfurizing, enters stove molten iron S：0.005%.
2）Converter smelting：80 tons of converter heat size, uses deslagging technique in converter smelting early stage, 1/2 is poured out after slag chargeization is good
Slag, continues to smelt；Later stage draws technique of re-blowing using high, and molten steel tapping uses slide plate pushing off the slag, the lower quantity of slag of control, Oxygen Content in Liquid Steel
700ppm, adds 0.6kg/ tons of steel of aluminium block and carries out pre-deoxidation, 1618 DEG C of molten steel tapping temperature, terminal composition：C：0.045%, Si：
0.003%, Mn：0.05%, S：0.005%, P：0.008%.
3）LF stoves are refined：After LF enters the station, Oxygen Content in Liquid Steel 450ppm is warming up to 1640 DEG C, ladle bottom is strong using argon gas
Stirring；Heating finishes progress and determines oxygen operation, and closes Ladle Bottom air blowing, is sprinkled into refining ladle slag modifier+aluminum shot to the top of the slag and enters
The slag transformation of the way operation of row top, after reaction, dips in slag specimen finishing slag for green glass slag, FeO is 4.0% in slag.Refining ladle slag modifier
Chemical composition and weight/mass percentage composition are：CaO：20%, Al2O3：23%, SiO2：2%, S：0%, P：0%, Al：37%.
4）RH decarburized alloys：The tapping molten steel of LF stoves is transported to RH stoves and carries out Decarburization Operation, and oxygen is determined after entering the station；Using OB works
Skill carries out decarburization, and OB uses full pumping application of vacuum, vacuum degree control 90pa after starting；After OB terminates, decarburization circulation time
10min, decarburization terminates to determine oxygen；After decarburization terminates, add the micro- ferro-silicon-aluminiums of 2400kg and carry out deoxidation alloying, measure molten steel dissolved oxygen
25ppm；Pressed again after circulation 5min, soft blow time 6min.
5) continuous casting：After molten steel RH is leaving from station, upper large square bland continuous-casting machine is cast into 325mm × 280mm blooms, and big bag is using length
The mouth of a river is protected, and crystallizer carries out whole process protection cast, 1540 DEG C of tundish temperature, pulling rate 0.7m/min, plug using submersed nozzle
Rod argon blowing rate obtains continuous casting blooms in 50NL/h；Continuous casting blooms chemical composition and weight percentage are：C：0.005%,
Si：1.80%, Mn：0.050%, P：0.008%, S：0.005%, Alt：0.003%, Ti：0.003%, O：0.005%, N：0.004%,
Ni：0.015%, Cr：0.018%, Cu：0.017%, remaining is Fe and inevitable impurity.
Embodiment 3
High Si pure iron chemical composition and weight percentage are：C：0.004%, Si：2.00%, Mn：0.035%, P：0.008%, S：
0.005%, Alt：0.003%, Ti：0.002%, O：0.004%, N：0.004%, Ni：0.010%, Cr：0.015%, Cu：0.010%,
Remaining is Fe and inevitable impurity.
The production method of the high Si pure iron square billet of the present embodiment includes molten iron pretreatment, converter smelting, LF stoves are refined, RH stoves take off
Carbon alloy, continuous casting working procedure, are comprised the following steps that：
1）Molten iron is pre-processed：Molten iron pretreatment desulfurizing, enters stove molten iron S：0.005%.
2）Converter smelting：80 tons of converter heat size, uses deslagging technique in converter smelting early stage, 1/2 is poured out after slag chargeization is good
Slag, continues to smelt；Later stage draws technique of re-blowing using high, and molten steel tapping uses slide plate pushing off the slag, the lower quantity of slag of control, Oxygen Content in Liquid Steel
800ppm, adds 1.0kg/ tons of steel of aluminium block and carries out pre-deoxidation, 1610 DEG C of molten steel tapping temperature, terminal composition：C：0.040%, Si：
0.003%, Mn：0.05%, S：0.005%, P：0.007%.
3）LF stoves are refined：After LF enters the station, Oxygen Content in Liquid Steel 480ppm is warming up to 1650 DEG C, ladle bottom is strong using argon gas
Stirring；Heating finishes progress and determines oxygen operation, and closes Ladle Bottom air blowing, is sprinkled into refining ladle slag modifier+aluminum shot to the top of the slag and enters
The slag transformation of the way operation of row top, after reaction, dips in slag specimen finishing slag for green glass slag, FeO is 2.0% in slag.Refining ladle slag modifier
Chemical composition and weight/mass percentage composition are：CaO：23%, Al2O3：25%, SiO2：4%, S：0.07%, P：0.02%, Al：38%.
4）RH decarburized alloys：The tapping molten steel of LF stoves is transported to RH stoves and carries out Decarburization Operation, and oxygen is determined after entering the station；Using OB works
Skill carries out decarburization, and OB uses full pumping application of vacuum, vacuum degree control 80pa after starting；After OB terminates, decarburization circulation time
11min, decarburization terminates to determine oxygen；After decarburization terminates, add the micro- ferro-silicon-aluminiums of 2400kg and carry out deoxidation alloying, measure molten steel dissolved oxygen
18ppm；Pressed again after circulation 4min, soft blow time 4min.
5) continuous casting：After molten steel RH is leaving from station, upper large square bland continuous-casting machine is cast into 325mm × 280mm blooms, and big bag is using length
The mouth of a river is protected, and crystallizer carries out whole process protection cast, 1550 DEG C of tundish temperature, pulling rate 0.7m/min, plug using submersed nozzle
Rod argon blowing rate obtains continuous casting blooms in 65NL/h；Continuous casting blooms chemical composition and weight percentage are：C：0.004%,
Si：2.00%, Mn：0.035%, P：0.008%, S：0.005%, Alt：0.003%, Ti：0.002%, O：0.004%, N：0.004%,
Ni：0.010%, Cr：0.015%, Cu：0.010%, remaining is Fe and inevitable impurity.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
1. a kind of energy saving transformer iron core is with high Si pure iron, it is characterised in that the chemical composition and quality of the high Si pure iron
Percentage composition is as follows：C≤0.006%, Si：1.80~2.20%, Mn≤0.060%, P≤0.010%, S：0.006%, Alt≤
0.004%, Ti≤0.003%, O≤0.006%, N≤0.005%, Ni≤0.020%, Cr≤0.030%, Cu≤0.020%, remaining is
Fe and inevitable impurity.
2. the production method based on the high Si pure iron of a kind of energy saving transformer iron core described in claim 1, it is characterised in that
The production method includes molten iron pretreatment, converter smelting, the refining of LF stoves, RH stoves decarburized alloy, continuous casting working procedure；The continuous casting
Process, continuous casting blooms chemical composition and weight percentage are：C≤0.006%, Si：1.80~2.20%, Mn≤0.060%, P
≤ 0.010%, S：0.006%, Alt≤0.004%, Ti≤0.003%, O≤0.006%, N≤0.005%, Ni≤0.020%, Cr≤
0.030%, Cu≤0.020%, remaining is Fe and inevitable impurity.
3. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 1, it is characterised in that
S≤0.006% in the hot metal pre process procedures, pretreatment desulfurizing, control molten steel.
4. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 1, it is characterised in that
The converter smelting process, converter smelting early stage uses deslagging technique, outwells the oxidizing slag containing high P, Mn；Later stage is mended using high draw
Blow moulding, control molten steel C≤0.06%, liquid steel temperature≤1620 DEG C.
5. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the converter smelting process, tapping uses slide plate pushing off the slag, the lower quantity of slag of control, tapping Control for Oxygen Content≤
800ppm, pre-deoxidation is carried out using aluminium block, and aluminium block addition is 0.5-1.0kg/ tons of steel.
6. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the LF stoves refining procedure, Oxygen Content in Liquid Steel≤500ppm after control is entered the station, are warming up to 1640~1660 DEG C,
Ladle bottom uses argon gas strong mixing.
7. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the LF stoves refining procedure, heating finishes progress and determine oxygen operation, closes Ladle Bottom and blows, to the top of the slag on addition
Refining ladle slag modifier+aluminum shot carries out top slag transformation of the way operation, after reaction, dips in slag specimen observation clinker color, finishing slag green glass
FeO≤5.0% in slag or Transparent color, slag；The main chemical compositions and weight/mass percentage composition of refining ladle slag modifier are：CaO：
20~28%, Al2O3：23~30%, SiO2：2~8%, S：0~0.15%, P：0~0.05%, Al：37~43%.
8. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the RH stoves decarburized alloy chemical industry sequence, LF stoves tapping molten steel is transported to RH stoves and carries out Decarburization Operation, it is fixed after entering the station
Oxygen；Decarburization is carried out using OB techniques, OB uses full pumping application of vacuum, vacuum degree control≤100pa after starting；After OB terminates,
Decarburization circulation time >=8min is controlled, decarburization determines oxygen after terminating.
9. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the RH stoves decarburized alloy chemical industry sequence, after decarburization terminates, adds micro- ferro-silicon-aluminium and carries out deoxidation alloying, add
Measure as 30kg/ tons, molten steel dissolved oxygen content control≤30ppm, circulation 3-5min is pressed again, keep soft blow 4-6min.
10. a kind of production method of the high Si pure iron of energy saving transformer iron core according to claim 2-4 any one,
Characterized in that, the continuous casting working procedure, after molten steel RH is leaving from station, upper conticaster is cast into 325mm × 280mm blooms, and big bag is adopted
Protected with long nozzle, crystallizer carries out whole process protection cast using submersed nozzle, tundish temperature is controlled at 1540-1560 DEG C,
Pulling rate 0.7m/min, stopper argon blowing rate is in 50~80NL/h.
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| CN108559905A (en) * | 2018-03-09 | 2018-09-21 | 邢台钢铁有限责任公司 | High amorphized silicon pure iron as raw material and its production method |
| CN115433868A (en) * | 2022-09-15 | 2022-12-06 | 山西太钢不锈钢股份有限公司 | Ultra-pure Fe-Si intermediate alloy for amorphous industry and manufacturing method thereof |
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