CN104498669A - High deoxidation rate aluminum silicon manganese compound deoxidizer - Google Patents
High deoxidation rate aluminum silicon manganese compound deoxidizer Download PDFInfo
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- CN104498669A CN104498669A CN201410684201.8A CN201410684201A CN104498669A CN 104498669 A CN104498669 A CN 104498669A CN 201410684201 A CN201410684201 A CN 201410684201A CN 104498669 A CN104498669 A CN 104498669A
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- deoxidizer
- aluminium
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- reductor
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Abstract
The invention provides a high deoxidation rate aluminum silicon manganese compound deoxidizer composed of silicon, manganese and aluminum, and the deoxidizer comprises 30%-45% by mass of silicon, 35%-56% by mass of manganese and 10%-21% by mass of aluminum. The invention also provides a preparation method of the compound deoxidizer, and the method is as follows: weighing the silicon, manganese and aluminum according to the mass percentage, then adding the silicon, manganese and aluminum into an electric furnace to smelt in the electric furnace at the smelting temperature of 1420-1550 DEG C, then discharging, and casting into a massive deoxidizer ingot. The compound deoxidizer not only can be equal to pure aluminum in deoxidation capability, and to be more important, the compound deoxidizer can change inclusion type, reduces inclusion melting point, and has high density.
Description
Technical field
The invention belongs to field of metallurgy, particularly relate to a kind of complex deoxidizer for steelmaking, specifically a kind of aluminium Composite silicomanganese deoxidizer of high DNA vaccine.
Background technology
In current stainless steel smelting, end-deoxidizer used is mostly the reductor of Fe-Si-Al composite deoxidant, fine aluminium reductor or alkali metal containing, as Al-Si-Ca alloy etc.
Stainless steel adopts containing the high reductor deoxidation of Al, can produce a large amount of Al in molten steel
2o
3, aluminate, aluminium chromium and aluminum-spinel inclusion, these firmly crisp indeformable inclusiones shorten stainless steel fatigue lifetime, reduces the major cause of fatigue strength and surface quality.Adopt the high aluminium deoxidizer that contains to carry out final deoxygenation, owing to reducing insufficient or deficiency of time, cause reduzate to have little time to float, affect Molten Steel Cleanliness, steel quality (level of inclusions) can be made not meet product technology requirement.Meanwhile, the high aluminium deoxidizer that contains is adopted to carry out final deoxygenation, usually can because of Al in casting process
2o
3, CaOAl
2o
3, MgOAl
2o
3and CaS assembles at the mouth of a river, and produce nozzle clogging, even if still like this through the carbon aluminium-killed steel of Calcium treatment.This not only affects casting sequence and continuous casting productivity, affects lumber recovery and production cost, also easily causes the surface imperfection of strand and cold rolled sheet.Large quantifier elimination shows, the nozzle clogging in stainless steel, aluminium killed steel casting process is all relevant with the remaining aluminum amount in molten steel.Reduce the important measures that the residual aluminium of molten steel is minimizing and prevention of immersed nozzle clogging.
For the composite deoxidant of the such as alkali metal containing such as Al-Si-Ca, its deoxidizing capacity is very strong, but basic metal is too easily oxidized, and in the preparation of reductor, the recovery rate of element is very low, raw material consumption is too large, and alkali metal containing reductor is easy to absorb the moisture in air and efflorescence.
Adopt Al-Si binary reductor, density is low, and not easily sink to molten steel inside, therefore deoxidation effectiveness is lower.
Summary of the invention
For above-mentioned technical problem of the prior art, the invention provides a kind of aluminium Composite silicomanganese deoxidizer of high DNA vaccine, the aluminium Composite silicomanganese deoxidizer of described this high DNA vaccine solves the low technical problem of reductor deoxidation effectiveness of the prior art.
The aluminium Composite silicomanganese deoxidizer of a kind of high DNA vaccine of the present invention, be made up of silicon, manganese and aluminium, in described reductor, the mass percent of described silicon is 30% ~ 45%, the mass percent of described manganese is 35% ~ 56%, and the mass percent of described aluminium is 10% ~ 21%.
Present invention also offers the preparation method of the aluminium Composite silicomanganese deoxidizer of above-mentioned high DNA vaccine, take silicon, manganese and aluminium according to mass percent, then silicon, manganese and aluminium are added in electric furnace, melting in electric furnace, smelting temperature is 1420 ~ 1550 DEG C, then comes out of the stove, and casts block reductor ingot and uses.
The invention solves and use high aluminium content reductor to after the deoxidation of the steel grade such as stainless steel and aluminium killed steel at present, the nozzle clogging problem produced in casting process.In order to alleviate the degree of nozzle clogging, the way usually taked reduces the content of aluminium in composite deoxidant, but low aluminium composite deoxidant has reduction in deoxidation effect.Composite deoxidant of the present invention, can not only be suitable with fine aluminium deoxidation on deoxidizing capacity, the more important thing is and can also change inclusion type, reduce inclusion melting point.Meanwhile, reductor also has higher density.
Self-existent pure Al is not produced in molten steel after low aluminium ensure that stainless steel and aluminium killed steel deoxidation
2o
3, reduce the fusing point of deoxidation products, the final castability improving molten steel simultaneously, reduce and eliminate casting process nozzle clogging and nozzle clogging, improve casting sequence and the continuous casting productivity of continuous casting, improve continuous casting material-forming rate, improve inherence and the surface quality of strand.
The deoxidation effect of Si-Mn-Al reductor of the present invention is compared with pure Al deoxidation effect, and difference is little.This reductor density is roughly 4600-6400 kg/m
3, highdensity reductor easily immerses in molten steel, and in process heavy at the fast speed, the oxygen directly and in molten steel inside reacts, and deaeration time shortens greatly.Deoxidation products does not have independent pure Al
2o
3, be complex compound, fusing point is low, and granularity is large, easy agglomeration and eliminatings of floating, and can effectively reduce inclusion content, alleviate nozzle clogging degree, the purity of raising molten steel.Reductor fusing point of the present invention is low, is easy to fusing after input, adds density comparatively greatly, can sink to molten steel rapidly, and melt rapidly and complete deoxygenation.Reductor of the present invention is at room temperature deposited and efflorescence is not occurred, and is convenient to store and transport.
The present invention compares with prior art, and its technical progress is significant.The present invention, alleviating under the nozzle clogging degree prerequisite in steelmaking process, ensure that the deoxidizing capacity of reductor, changes the type of deoxidation products simultaneously, improve the density of reductor, improve the efficiency of deoxidation.Si-Mn-Al reductor of the present invention not only can be used for stainless final deoxygenation, and also can be used for other carbon aluminium-killed steels and the Si killed steel of avoiding nozzle clogging, be widely used prospect.
Embodiment
Embodiment 1
Prepared according to the methods of the invention go out Si-Mn-Al composite deoxidant composition 42.07%Si-37.85%Mn-20.08% Al, other elements restriction as shown in table 1.
Other elemental compositions restriction in table 1 reductor
The present invention is using industrial silicon and commercial-purity aluminium, manganese metal as raw material, and the raw material added needed for calculating according to configuration requirement, melting in electric furnace, smelting temperature is 1420 ~ 1550 DEG C, then comes out of the stove, and needs according to user the block reductor ingot casting different lumpiness.In the deoxidation process of stainless steel and aluminium killed steel, this reductor is directly dropped into molten steel, complete deoxidation process.Input amount determines according to the initial oxygen content in molten steel and molten steel amount.Add-on is generally 0.5-2 kg/t molten steel.
Embodiment 2
Prepared according to the methods of the invention go out Si-Mn-Al composite deoxidant composition 42.07%Si, 37.85%Mn, 20.08% Al, other elements restriction as shown in table 1.
Preparation method is with embodiment 1.
Embodiment 3
Prepared according to the methods of the invention go out Si-Mn-Al composite deoxidant composition 34.08%Si, 50.92%Mn, 15.00% Al, other elements restriction as shown in table 1.
Preparation method is with embodiment 1.
Table 2 result of this reductor to 304 stainless steel deoxidations
At the reductor that above-mentioned three compositions of use for laboratory divide, add-on is 3.5 kg/t of molten steel amount, as shown in table 2 to 304 stainless steel deoxidation results.Also list in table 2 and make the contrast and experiment of reductor to 304 stainless steel deoxidations with the pure Al measured and pure Si.
From table 2 result, composite deoxidant prepared by the present invention, although Al content is very low, lower than 21%, the deoxidizing capacity of its deoxidizing capacity and pure Al reductor is more or less the same, more much higher than pure Si reductor deoxidizing capacity.
Claims (2)
1. the aluminium Composite silicomanganese deoxidizer of a high DNA vaccine, it is characterized in that: be made up of silicon, manganese and aluminium, in described reductor, the mass percent of described silicon is 30% ~ 45%, the mass percent of described manganese is 35% ~ 56%, and the mass percent of described aluminium is 10% ~ 21%.
2. the preparation method of the aluminium Composite silicomanganese deoxidizer of a kind of high DNA vaccine according to claim 1, it is characterized in that: take silicon, manganese and aluminium according to mass percent, then silicon, manganese and aluminium are added in electric furnace, melting in electric furnace, smelting temperature is 1420 ~ 1550 DEG C, then come out of the stove, cast block reductor ingot and use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684201.8A CN104498669A (en) | 2014-11-25 | 2014-11-25 | High deoxidation rate aluminum silicon manganese compound deoxidizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684201.8A CN104498669A (en) | 2014-11-25 | 2014-11-25 | High deoxidation rate aluminum silicon manganese compound deoxidizer |
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| CN104498669A true CN104498669A (en) | 2015-04-08 |
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| CN201410684201.8A Pending CN104498669A (en) | 2014-11-25 | 2014-11-25 | High deoxidation rate aluminum silicon manganese compound deoxidizer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913011A1 (en) * | 1978-04-03 | 1979-10-11 | Centre Rech Metallurgique | Deoxidation of mild killed steel - forming spessartite which may be decanted by simultaneously adding cpds. of manganese, silicon and aluminium |
| JPS5518545A (en) * | 1978-07-25 | 1980-02-08 | Natl Res Inst For Metals | Deoxidizing alloy for molten steel |
| CN1082117A (en) * | 1993-03-29 | 1994-02-16 | 黄春林 | Strong multicomponent deoxidant, additive |
| US6077326A (en) * | 1997-07-01 | 2000-06-20 | Rock Creek Aluminum | Steel additive for processing molten steel |
| CN1320709A (en) * | 2001-03-06 | 2001-11-07 | 江苏江南铁合金有限公司 | Al-Si-Mn alloy for deoxidizing molten steel and as alloy additive and its preparing process |
| CN1382822A (en) * | 2002-04-03 | 2002-12-04 | 常州格贝尔合金有限公司 | Al-Si-Mn alloy and its preparing process |
| CN1814815A (en) * | 2006-02-25 | 2006-08-09 | 李永毅 | Silicon-manganese-aluminium briquet |
-
2014
- 2014-11-25 CN CN201410684201.8A patent/CN104498669A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913011A1 (en) * | 1978-04-03 | 1979-10-11 | Centre Rech Metallurgique | Deoxidation of mild killed steel - forming spessartite which may be decanted by simultaneously adding cpds. of manganese, silicon and aluminium |
| JPS5518545A (en) * | 1978-07-25 | 1980-02-08 | Natl Res Inst For Metals | Deoxidizing alloy for molten steel |
| CN1082117A (en) * | 1993-03-29 | 1994-02-16 | 黄春林 | Strong multicomponent deoxidant, additive |
| US6077326A (en) * | 1997-07-01 | 2000-06-20 | Rock Creek Aluminum | Steel additive for processing molten steel |
| CN1320709A (en) * | 2001-03-06 | 2001-11-07 | 江苏江南铁合金有限公司 | Al-Si-Mn alloy for deoxidizing molten steel and as alloy additive and its preparing process |
| CN1382822A (en) * | 2002-04-03 | 2002-12-04 | 常州格贝尔合金有限公司 | Al-Si-Mn alloy and its preparing process |
| CN1814815A (en) * | 2006-02-25 | 2006-08-09 | 李永毅 | Silicon-manganese-aluminium briquet |
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Application publication date: 20150408 |
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