CN106967917A - The control method of FeV80 alloy carbon contents - Google Patents
The control method of FeV80 alloy carbon contents Download PDFInfo
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- CN106967917A CN106967917A CN201710293274.8A CN201710293274A CN106967917A CN 106967917 A CN106967917 A CN 106967917A CN 201710293274 A CN201710293274 A CN 201710293274A CN 106967917 A CN106967917 A CN 106967917A
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- fev80
- carbon content
- decarburizer
- control method
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
- C22C27/025—Alloys based on vanadium, niobium, or tantalum alloys based on vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention belongs to field of metallurgy, and in particular to a kind of control method of FeV80 alloys carbon content.The technical problems to be solved by the invention are to provide a kind of control method of FeV80 alloys carbon content, comprise the following steps：By raw material V2O5, aluminum shot, abrasive grit and lime mix, add in stove smelt in batches, smelted per batch and go out primary slag after terminating, finished until whole raw materials enter stove and smelted, the mixing slag gold in stove is poured into ingot mould, it is cooling, broken；Smelt or the process of coming out of the stove need to add decarburizer.Raw materials for metallurgy is added in smelting body of heater by the inventive method according to different proportion is by stages secondary, by controlling alloy inclusions source, adjusting process technology, adding the means such as special decarburizer, effectively reduce alloy carbon content, alloy finished product qualification rate can not only be improved, additionally it is possible to meet specific demand of the client for low-carbon vanadium iron.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to the control method of FeV80 alloy carbon contents.
Background technology
The vanadium micro-alloying intermediate alloy being most widely used as current steel and iron industry, traditional vanadium iron smelts master
If straight tube stove one-step method vanadium iron smelting process or many phase method smelting processes of stove of tumbling by raw material of barium oxide, using metal
The reducing agents such as aluminium, ferrosilicon to barium oxide carry out high temperature thermal reduction, react generation vanadium metal rapidly with molten metal iron solid solution
Sedimentation.According to GB/T4139-2004 vanadium iron national standards, according to difference of the reduction process with iron/content of vanadium and impurity content,
8 different vanadium iron trades mark can be obtained.FeV80 alloy products are high compared with FeV50 due to content of vanadium, to obtain identical impurity group
Into FeV80 alloys, its preparation process is naturally also just high compared with FeV50 to the grade requirement of raw materials for metallurgy.Carbon is used as FeV80 alloys
In main nonmetallic inclusion, its number, which directly affects the quality of alloy product and its is added to as intermediate alloy, made steel
To the influence of carbon content of molten steel in journey, the content of carbon in FeV80 alloy finished products is controlled, FeV80 economy can not only be improved
Value, moreover it is possible to meet alloy and prepare specific demand of the enterprise for downstream client.Mainly wrap in the source of aluminothermic process smelting ferrovanadium carbon
Include raw material (barium oxide, abrasive grit, aluminum shot), electrode, additive (lime, fluorite) and the resistance to material of furnace lining (magnesia brick, magnesia carbon brick).Cause
How this, control source and the course control method for use of carbon, and the control to alloy carbon content is particularly important.
Patent CN 100457949 provides a kind of control method of carbon content in ultralow carbon high strength high toughness steel, calm using half
Molten steel oxygen activity is maintained at 0.0080~0.0150%, carbon content and is maintained at less than 0.10% before steel, application of vacuum, and vacuum is protected
Hold in below 300Pa, utilize reaction between carbon and oxygen decarburization.The carbon content of high-strength and high-toughness steel, technique letter are controlled using the method for the present invention
Single, cost is low, easy to operate, carbon content is easy to control；Patent CN 103627839A provide a kind of semi-steel making carbon content control side
Method and Semi-steel making method, the carborundum of 1.5~6.0kg/ (t half steels) ferrosilicon and 1.0~5.0kg/ (t half steels) is added to
In ladle；Then half steel is blended into converter, lower rifle oxygen blast simultaneously adds related slag making materials and alloy by blowing requirement, treats steel
Coolant-temperature gage, which reaches, proposes oxygen rifle after requirement, stop blowing, and the invention can shorten the slag formation time at initial stage, improve liquid steel temperature；
Patent 201510740668.4 discloses a kind of sintering method of control sintered metal product carbon oxygen content, and methods described is to burn
Product to be sintered is placed in and can be sintered in the closed system that surrounds of metallic plate of oxygen uptake during knot, this method drops significantly
The carbon oxygen content of low product, it is ensured that the good comprehensive mechanical property of product.
In terms of technology disclosed above, conventional metallurgical process (particularly steelmaking process) is for different smelting stage carbon contents
Control have many technological reserve and solution, related process comparative maturity, but for high temperature vanadium-base alloy impurity into
Divide control technology, and not disclosed report.
The content of the invention
The invention provides a kind of control method of FeV80 alloys carbon content, this method is on the basis of existing alloy production
On, carry out material composition control and add the means such as decarburizer so that FeV80 alloy carbon content controls below 0.09%, into
Product qualification rate is significantly improved.
The present invention solves the technical scheme of above-mentioned technical problem, comprises the following steps：By raw material V2O5, aluminum shot, abrasive grit and stone
Ash is mixed, and is smelted in batches in addition stove, is smelted per batch and is gone out primary slag after terminating, and is finished until whole raw materials enter stove smelting,
Mixing slag gold in stove is poured into ingot mould, is cooled down, is crushed；Smelt or the process of coming out of the stove need to add decarburizer.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, the decarburizer is FeO or Fe2O3。
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, when decarburizer be FeO when, its addition be 10~
100kg/t FeV80；When decarburizer is Fe2O3When, its addition is 10~60kg/t FeV80.FeV80 herein is according to raw material
Addition theoretical calculation obtain.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, the smelting or the process of coming out of the stove need to add decarburizer
Specially：Decarburizer mixes addition with last batch raw material and smelted；Or decarburizer is added without in smelting process, but
Directly decarburizer is laid in ingot mould bottom, then mixing slag gold is cast on decarburizer.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, the decarburizer is laid in ingot mould bottom, needs volume
Electric furnace is heated again outside, 5~15min of heat time, temperature control is at 1850~1900 DEG C, then again by mixing slag
Gold, which is cast in, to be laid on the decarburizer of ingot mould bottom.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, lining material matter is magnesia brick, magnesium in the smelting furnace body
Brick thickness is 30~80cm, and the carbon content of magnesia liner is below 1.0%.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, the raw materials for metallurgy V2O5, Fe, Al, in lime
Carbon content is respectively 0.10%, 1.00%, 0.20%, less than 2.00%.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, raw material V2O5, aluminum shot, abrasive grit, the quality of lime match somebody with somebody
Plus ratio is the ︰ 0.5~2.5 of 10 ︰, 5~12 ︰ 1~1.3.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, content of vanadium is less than 1.2% in every batch metallurgical slag
Terminate to smelt.
It is preferred that, in the control method of above-mentioned FeV80 alloys carbon content, amount of slag is the 75~85% of total quantity of slag.
It is relatively low that the inventive method has finally given carbon content by the means such as material composition control and addition decarburizer
FeV80 alloys, with convenient, fast, easy-operating advantage；With it, FeV80 alloy carbon contents exceeding standard rate reduction by 93%
More than, and the element such as Al, Si, S is also preferably removed in alloy, A grades of product rates of alloy improve more than 40%.
Embodiment
The method for controlling FeV80 alloy carbon contents, comprises the following steps：By raw material V2O5, aluminum shot, abrasive grit and lime mix,
Add in stove and smelt in batches, primary slag is gone out after the completion of being smelted per batch, requirement is mixed in last batch raw materials for metallurgy
Decarburizer add together in smelting furnace smelt, smelting terminate after, slag gold is poured into ingot mould, slow cooling to less than 800 DEG C, tear open stove,
It is water cooling, broken；Or by raw material V2O5, aluminum shot, abrasive grit and lime mix, add in stove smelt in batches, smelted per batch
After the completion of go out primary slag, after smelting terminates, slag gold is poured into tiling has in the ingot mould of decarburizer, heating and thermal insulation, and then slow cooling is extremely
Less than 800 DEG C, tear stove, water cooling open, crush.
For the selection of decarburizer in the inventive method, the oxidation removal for being mainly based upon C is theoretical, need to add to smelting process
Enter oxidant.The most frequently used oxidant of current metallurgy industry includes O2, high price compound and high volence metal ion.Although O2With very
Strong oxidisability, and it is with low cost, but the oxidation and decarbonization process using it as oxidant does not possess the condition of selective oxidation,
The oxidational losses of main alloying component can be caused, and the addition of the high price compound such as Mn/Cl/Cr can cause system to introduce newly miscellaneous
Matter；Final choice metal oxide is as oxidant, with reference to alloy and slag oxidisability power and the golden main component of slag, final choosing
Ferriferous oxide is selected as decarburizer.For the control of decarburization agent content, mainly in view of mistake in ferriferous oxide and metal alloy
After the reaction of surplus metal Al, Si element, then carry out decarburizing reaction.Its upper limit controlling value is alloy aluminium content and silicone content is composition
Criterion of acceptability is limited, and lower limit is the addition for removing alloy C when alloy Al/Si contents are 0 completely.Decarburizer is used as when using FeO
When be 10~100kg/t FeV80, when using Fe2O3It is 10~60kg/t FeV80 as during decarburizer.
The embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Comparative example
With 8t V2O5The smelting of three phases is carried out for raw material, is during which slagged tap twice.Raw materials for metallurgy V2O5, Fe, Al, the carbon of lime contains
Amount is respectively 0.01%, 0.95%, 0.13% and 1.92%.Without any decarburizer, conventional smelting, total conduction time are carried out
95min.After the smelting of three phases terminates, TV contents are that 1.35%, FeV80 alloys V content is 80.14% in slag, and alloy carbon content is
0.29%, it is 96.5% that vanadium iron, which smelts yield,.
Embodiment 1
With 8t V2O5The smelting of three phases is carried out for raw material, is slagged tap twice.Raw materials for metallurgy V2O5, Fe, Al, the carbon content point of lime
Wei 0.01%, 0.06%, 0.13% and 0.33%.Carry out conventional smelting, total conduction time 88min.After the smelting of three phases terminates,
TV contents are 1.30% in slag, and it is 96.8% that vanadium iron, which smelts yield, and alloy carbon content is 0.15%.
Embodiment 2
With 8t V2O5The smelting of three phases is carried out for raw material, is slagged tap twice.Raw materials for metallurgy V2O5, Fe, Al, the carbon content point of lime
Wei 0.01%, 0.06%, 0.13% and 0.33%.Decarburizer FeO 480kg, total conduction time are mixed into third phase mixed ingredients
95min (be powered 7min outside casting forehead).After smelting terminates, TV contents are 1.32% in slag, and it is 96.6% that vanadium iron, which smelts yield,
Alloy carbon content is 0.08%.
Embodiment 3
With 3t V2O5Smelted for raw material according to one-step technology, slag iron goes out together after the completion of smelting, raw materials for metallurgy V2O5、
Fe, Al, the carbon content of lime are respectively 0.01%, 0.06%, 0.15% and 0.36%.Add decarburizer FeO 100kg tilings
In pouring ingot mould bottom, total conduction time 25min.After smelting terminates, TV contents are 1.36% in slag, and vanadium iron smelts yield and is
96.3%, alloy carbon content is 0.07%.
Embodiment 4
With 8t V2O5The smelting of three phases is carried out for raw material, is slagged tap twice.Raw materials for metallurgy V2O5, Fe, Al, the carbon content point of lime
Wei 0.01%, 0.06%, 0.11% and 0.37%.Decarburizer Fe is mixed into third phase mixed ingredients2O3320kg, when being always powered
Between 96min (casting forehead outside be powered 8min).After smelting terminates, TV contents are 1.31% in slag, and vanadium iron smelts yield and is
96.5%, alloy carbon content is 0.07%.
Embodiment 5
With 8t V2O5The smelting of three phases is carried out for raw material, is slagged tap twice.Raw materials for metallurgy V2O5, Fe, Al, the carbon content point of lime
Wei 0.01%, 0.05%, 0.15% and 0.41%.Decarburizer Fe is mixed into third phase mixed ingredients2O360kg, total conduction time
95min.After smelting terminates, TV contents are 1.29% in slag, and it is 96.7% that vanadium iron, which smelts yield, and alloy carbon content is 0.06%.
Claims (10)
1.FeV80 the control method of alloy carbon content, it is characterised in that：Comprise the following steps：By raw material V2O5, aluminum shot, abrasive grit and
Lime is mixed, and adds in stove smelt in batches, is smelted per batch and is gone out primary slag after terminating, smelted until whole raw materials enter stove
Finish, the mixing slag gold in stove is poured into ingot mould, cool down, crush；Smelt or the process of coming out of the stove need to add decarburizer.
2. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：The decarburizer is FeO
Or Fe2O3。
3. the control method of FeV80 alloys carbon content according to claim 2, it is characterised in that：When decarburizer is FeO
When, its addition is 10~100kg/t FeV80；When decarburizer is Fe2O3When, its addition is 10~60kg/t FeV80.
4. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：The smelting is come out of the stove
Process need to add decarburizer：Decarburizer mixes addition with last batch raw material and smelted；Or in smelting process
Decarburizer is added without, but directly decarburizer is laid in ingot mould bottom, then mixing slag gold is cast on decarburizer.
5. the control method of FeV80 alloys carbon content according to claim 4, it is characterised in that：The decarburizer tiling
In ingot mould bottom, need additionally to heat electric furnace again, 5~15min of heat time, temperature control is 1850~1900
DEG C, then mixing slag gold is cast in again and is laid on the decarburizer of ingot mould bottom.
6. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：In the smelting furnace body
Lining material matter is magnesia brick, and magnesia brick thickness is 30~80cm, and the carbon content of magnesia liner is below 1.0%.
7. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：The raw materials for metallurgy
V2O5, Fe, Al, the carbon content in lime is respectively 0.10%, 1.00%, 0.20%, less than 2.00%.
8. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：Raw material V2O5, aluminum shot, iron
Grain, the quality of lime are the ︰ 0.5~2.5 of 10 ︰, 5~12 ︰ 1~1.3 with addition of ratio.
9. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：Per in batch metallurgical slag
Content of vanadium terminates less than 1.2% for smelting.
10. the control method of FeV80 alloys carbon content according to claim 1, it is characterised in that：Amount of slag is total quantity of slag
75~85%.
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| CN104532105A (en) * | 2015-01-04 | 2015-04-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium by rollover furnace through electro-aluminothermic process |
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2017
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| CN1343794A (en) * | 2000-09-21 | 2002-04-10 | 攀枝花攀宏钒制品有限公司 | V2O3 electro-aluminothermic process for smelting FeV |
| CN1786227A (en) * | 2005-12-02 | 2006-06-14 | 攀枝花慧泰金属新材料有限公司 | Method of directly smelting vanadium alloy steel or vanadium titanium alloy steel using vanadium containing pig iron or sponge iron |
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Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee before: CHENGDU ADVANCED METAL MATERIAL INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |