CN1030617C - Al-Fe alloy using for aluminum steel deoxidation and method for prepn. of same - Google Patents
Al-Fe alloy using for aluminum steel deoxidation and method for prepn. of same Download PDFInfo
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- CN1030617C CN1030617C CN 94111237 CN94111237A CN1030617C CN 1030617 C CN1030617 C CN 1030617C CN 94111237 CN94111237 CN 94111237 CN 94111237 A CN94111237 A CN 94111237A CN 1030617 C CN1030617 C CN 1030617C
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- aluminium
- aluminum
- deoxidation
- ferroaluminium
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 87
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910000831 Steel Inorganic materials 0.000 title claims description 42
- 239000010959 steel Substances 0.000 title claims description 42
- 238000000034 method Methods 0.000 title description 20
- 229910045601 alloy Inorganic materials 0.000 title description 10
- 239000000956 alloy Substances 0.000 title description 10
- 229910018084 Al-Fe Inorganic materials 0.000 title 1
- 229910018192 Al—Fe Inorganic materials 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910000655 Killed steel Inorganic materials 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims description 60
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 9
- 238000005261 decarburization Methods 0.000 claims description 8
- 230000002829 reductive effect Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 235000013980 iron oxide Nutrition 0.000 claims description 7
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 claims description 7
- 235000002639 sodium chloride Nutrition 0.000 claims description 7
- 239000011780 sodium chloride Substances 0.000 claims description 7
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000010436 fluorite Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 206010044565 Tremor Diseases 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 1
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010079 rubber tapping Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 abstract 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 238000006253 efflorescence Methods 0.000 description 7
- 206010037844 rash Diseases 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 241001062472 Stokellia anisodon Species 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000006392 deoxygenation reaction Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- -1 silicon-aluminum-barium-strontium-iron Chemical compound 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides an aluminium-iron alloy used for aluminum killed steel deoxidization, and a preparation method thereof. The aluminium-iron alloy is prepared from the components of the proportion by weight: 40 to 50% of aluminum, 48 to 58% of iron, and impurity as the rest. The preparation method comprises the steps of proportioning, smelting and casting; the smelting having seven steps is carried out according to the sequence of aluminum feeding, oxidizing agent adding, reducing agent adding, alkaline slagging agent adding, aluminum feeding, stirring, slag removal and blast furnace tapping. The present invention has the characteristics of simple and convenient preparation method, no pulverization of products, strong deoxidizing capacity, low price, good economic and utilization effect, aluminum resource saving, etc.
Description
The invention belongs to the master alloy category of iron or steel, particularly the killed steel deoxidation is used, and especially is applicable to carbon aluminium-killed steel molten steel final deoxygenation alloy technology.
As everyone knows, have the killed steel steel grade of high ductibility, high stampability, especially be suitable for making the low charcoal aluminium killed steel steel grade of cold rolled sheet, all metallic elements such as silicon and manganese are considered as objectionable constituent and strict control.Thereby the molten steel final deoxygenation of this class steel grade is still adopting and is following fine aluminium deoxidization technique for a long time at present.And because this class steel grade is to contain more aluminium element with it to come its crystal grain of refinement, thereby it is more to produce the consumption aluminium amount of this class steel grade.Really, aluminium is a kind of strong reductor and alloying agents, but the density owing to aluminium in the melting deoxidation process is less, buoyancy in molten steel is bigger, is difficult for entering molten steel inside, and major part is closed and scaling loss with airborne oxidation, this just had a strong impact on it utilization ratio, increased the consumption of aluminium, improve production cost, wasted bauxite resource, be unfavorable for improving the economic benefit of steel-making enterprise.So people carry out the research of composite deoxidant, provided and " silicon-aluminum-barium-strontium-iron alloy " by 92111900.3 as Chinese patent application number; 92107299.6 " Al-Mn-Fe composite deoxidizers " that provided number are provided Chinese patent application; " steel-deoxidizing and interfused alloy " that the USSR (Union of Soviet Socialist Republics) application number is provided for " master alloy " that SU543683 provided and USSR (Union of Soviet Socialist Republics) application number SU418549 or the like.Take a broad view of existing this class reductor,, use and be not suitable for the aluminium killed steel deoxidation of molten steel because of in its composition, all containing more silicon or manganese.For this reason, people have carried out the applied research of ferroaluminium reductor again.In practice, it is found that this ferroaluminium, when its aluminium content greater than 30%, just powder extremely easily (being referred to as meaning " efflorescence ") thus lose practicality.And work as its aluminum content less than 40%, then its deoxidizing capacity and use economic benefit are just poor.Because the reason of above-mentioned two aspects, the application of ferroaluminium in killed steel molten steel final deoxygenation fails to realize always.
The object of the present invention is to provide a kind of deoxidizing capacity stronger, the lower aluminum content of price greater than efflorescence phase of 40% (comprising 40%) more than 6 months, be applicable to the especially ferroaluminium and preparation method thereof of aluminium killed steel molten steel final deoxygenation of killed steel, to solve the deficiencies in the prior art.
Aluminium content why can efflorescence greater than 30% ferroaluminium, and its mechanism is had different versions.The present inventor finds that the efflorescence of ferro-aluminum is relevant with silicon with its contained carbon in the years of researches practice.On the one hand, the carbon in the alloy, aluminium and oxide compound thereof and airborne water, hydrogen, nitrogen reaction, and under the katalysis of aluminium, transform and generate the Ammonia material; Aluminum oxide is then had an effect with airborne water, transforms into aluminium hydroxide.On the other hand, because the aluminium silicon binding substances in the alloy (or claiming aluminum silicon alloy) fusing point minimum (being about 577 ℃), thereby its final set in the alloy monolithic process of setting, and remain between crystal boundary, because this aluminium silicon binding substances is a kind of low strength material, strength of joint reduces between the alloy crystal boundary thereby make.Because above understanding, the present invention has taked the technical scheme of strict control carbon and silicone content, in the hope of prolonging the atomizing time that product of the present invention takes place significantly.
Realize the ferroaluminium composition that purpose of the present invention adopts, it includes aluminium, iron, carbon, silicon, copper and other impurity, and it is (%) that its weight percent is formed:
Aluminium 40～50
Iron 48～5 8
Carbon＜0.05;
Silicon＜2;
Copper＜0.04;
Other impurity surplus.
A kind of typical weight percentage composition of the present invention is (%):
Aluminium 44.5～46.5;
Iron 51.5～53.5;
Carbon＜0.03;
Silicon＜0.4;
Copper＜0.04;
Other impurity surplus.
Preparation method of the present invention comprises (1) batching--(2) melting--(3) cast successively.Said (1) batching and (3) are cast for ordinary method, and said (2) melting 7 steps are in the following order carried out:
(1) component drops into process furnace to the steel material by weight.Melt.
(2) add oxygenant.Carry out decarburization, desiliconization.
(3) add reductive agent.Carry out deoxidation, reducing iron oxides.
(4) add the alkaline slag former of forming by fluorite powder 30% and industrial table salt (NaCl) 70% weight percent, carry out slag making.
(5) component drops into the aluminium material by weight.
(6) stir and tremble, remove the gred.
(7) come out of the stove.
The solidification cooling of the liquation of said casting in mold be best＞and 120 ℃/second.
Said oxygenant is a ferric oxide, or air, or pure oxygen.
Said reductive agent is a ferrosilicon, or ferro-silicon-aluminium, or ferro-aluminum, or fine aluminium.
When preparation method of the present invention adopts ferric oxide to carry out decarburization, desiliconization, then its (2) melting 6 steps are in the following order carried out:
(1) ferric oxide of steel material is dropped into together adds hot melting furnace, melt and decarburization, desiliconization;
(2) add reductive agent, carry out deoxidation, reducing iron oxides;
(3) add the alkaline slag former of forming by fluorite powder 30% and industrial table salt 70% weight percent, carry out slag making;
(4) drop into the aluminium material;
(5) stir, remove the gred.
(6) come out of the stove.
The solidification cooling of the liquation of said casting in mold be best＞and 120 ℃/second.
The ferroaluminium of aluminum content more than 40% (weight percent) that adopts preparation method of the present invention to produce through Shanghai Baoshan Iron ﹠ Steel Group Corp. practical probation, confirms that its " efflorescence " phase is more than 6 months.
One of embodiments of the invention:
Processing condition adopt 0.51 intermediate frequency not have the iron core induction heater, power 250KW, standard capacity 500Kg.
(1) batching: every stove is measured by norm and is 500Kg, and the prescription of getting pure material is:
Steel scrap 292Kg (yield is 98% in melting)
Aluminium A
0208Kg (yield is 96% in melting)
(2) melting:
The first step drops into the steel material.292Kg steel scrap (light and thin type) is dropped into process furnace, be warming up to 1580 ℃, scrap melting.
Second step added ferric oxide, the 4.5Kg ferric oxide was dropped in the molten steel of process furnace, carried out decarburization, desiliconization, and the content of carbon is reduced to below 0.07%, and the content of silicon is reduced to below 0.03%.
The 3rd step added ferrosilicon, and the city of 2Kg is dropped in the process furnace molten steel for the 75# ferrosilicon, carried out deoxidation, reducing iron oxides.About 2～5 minutes of time.
In the 4th step, add slag charge.The mixed-alkali slag charge of the fluorite powder of 0.6Kg (60 order) and 1.4kg dehydration industrial table salt (NaCl) is dropped into process furnace.Carry out slag making.
In the 5th step, drop into the aluminium material.In the molten steel in the 208Kg of preheating aluminium material (aluminium ingot) drops into process furnace.
In the 6th step, stir.Fully stir with artificial, it is mixed that aluminium, iron are stirred, and drag for removing dross.
The 7th goes on foot, treats etc. to come out of the stove at once when furnace temperature drops to 1350 ℃, prepares cast (after in fact dropping into the aluminium material, furnace temperature promptly descends voluntarily).
(3) casting.Its processing condition are: mold adopts the cast alloy iron mould, and its weight is 7.5 times that the ferroaluminium liquation injects weight, and mold die cavity shape is the cone-shaped blind hole of platform of diameter 25mm, high 30mm.Adopt non-open type casting (promptly adding die cap).After the ferroaluminium liquation injects, inside and outside 6 seconds in the kind are, solidify (its speed of cooling is greater than 120 ℃/second) fully.Thereafter to be cooled to below 300 ℃, cool off in air even if unpack.
According to the batching of present embodiment and the ferroaluminium of melting method gained thereof, its weight percent aluminum content is 41～42%, carbon content＜0.03%, silicon content＜0.4%.
Two of embodiments of the invention.
In smelt stage, the first step and second step are merged, promptly ferric oxide and steel scrap are dropped in the process furnace simultaneously and melt.Other is all as one of embodiment.
Three of embodiments of the invention.
In second step of smelt stage, employing is blown air and is carried out decarburization, desiliconization (not adding ferric oxide) in the process furnace molten steel.Other is all as one of embodiment.
Four of the embodiment of the invention.
In second step of this smelt stage, decarburization, desiliconization (not adding ferric oxide) are carried out in employing oxygen blast in the process furnace molten steel.Other is all as one of embodiment.
Five of the embodiment of the invention.
In the 3rd step of smelt stage, adopt in the process furnace molten steel, to add and enter the market for ferro-silicon-aluminium 1.5Kg, carry out deoxidation, reducing iron oxides (not adding ferrosilicon).Other is all as one of embodiment.
Six of the embodiment of the invention.
In smelt stage the 3rd step, adopt that to add aluminum content in the process furnace molten steel be that 45% ferro-aluminum 1.5Kg carries out deoxidation, reducing iron oxides (not adding ferrosilicon).Other is all as one of embodiment.
Other embodiments of the invention need only the weight percent compositing range adjustment batching that provides by the present invention, and the above embodiments are carried out various combination, just can realize more a plurality of different embodiment.
Experimental example of the present invention:
Adopt ferroaluminium of the present invention, replace the fine aluminium deoxidation to produce the aluminium killed steel in-use testing in steel-making converter subsidiary factory of Shanghai Baoshan Iron ﹠ Steel Group Corp..
Test conditions and method are:
(1) material condition:
A) the ferro-aluminum composition is (weight percent):
Aluminium 45.01
Silicon 0.56
Carbon 0.032
Phosphorus 0.007
Sulphur 0.005
Copper 0.02
Iron surplus
B) visual appearance: lumpiness is 10～50mm, sees that from section composition is even, not efflorescence.
(2) operational condition:
The time of the production of test heat and simultaneous test heat, the steel grade of production, operational conditions such as the adding method of the method for melting and aluminium and ferro-aluminum are basic identical, and [T, the A of containing in the ladle of tapping back
1] measure as the foundation of calculating the aluminium recovery rate.
Under above-mentioned essentially identical operational condition, add fine aluminium and add the respectively simultaneous test of 26 heats of ferroaluminium deoxidation through 1 wheat harvesting period, its result is as follows:
1, the average aluminium recovery rate of ferro-aluminum is 22.11%, and the average aluminium recovery rate of fine aluminium is 14.8%.The recovery rate of ferro-aluminum is apparently higher than fine aluminium, and its increase rate is 49.39%.
2, ferro-aluminum is 1.49: 1 with the use ratio of fine aluminium.
3, duration of test is never found molten steel boiling, deoxidation bad phenomenon after adding ferro-aluminum.The stokehold workman is generally reflected and well especially under utmost point low-carbon (LC) situation, is preferred using ferro-aluminum, can reduce ladle sample bad phenomenon.
4, it is obviously lower than using fine aluminium to use cost of the present invention.At present, unit price of the present invention is 8.3 yuan/kilogram, and the fine aluminium unit price is 12 yuan/kilogram, and the unit price of block aluminium through after the processing that is used for deoxidation is 13.5 yuan/kilogram.
The use of pressing ferro-aluminum and aluminium was determined the required add-on of deoxidation than 1.49: 1.With the required fine aluminium of fine aluminium deoxidation is the 1.92Kg/t steel, then needs 2.86Kg/t steel (amounting to fine aluminium 1.29Kg/t steel) with the ferro-aluminum that contains aluminium 45%.
The ton steel cost that uses deoxidation of the present invention is than the ton steel cost that the uses the fine aluminium deoxidation 2.18 yuan/t steel that can descend.
(13.5 yuan/kilogram * 19.2 kilograms)-(8.3 yuan/kilogram * 2.86 kilograms)
=2.18 yuan/t steel
Produce 4,000,000 tons of AP killed steel in 1993 according to Baosteel and calculate, use annual cost-saved 8,720,000 yuan (do not comprise and add the output of steel that is increased behind the ferro-aluminum) of the present invention.
5, use the present invention can save a large amount of bauxite resources.
Ton steel joint aluminium: 1.92-1.29=0.63 kilogram.
Produced 4,000,000 tons of AP killed steel in 1993 according to Baosteel and calculate, use and to save 252 tons of bauxite resources the whole year of the present invention.
It is easy to be reliable to experiment showed, that the present invention has the preparation method, the product storage period Long, be difficult for efflorescence, deoxidizing capacity is stronger, and price is low, uses the good in economic efficiency spy of grade The point. And can save a large amount of aluminium data.
Claims (6)
1, a kind of ferroaluminium that is used for the aluminium killed steel deoxidation, it contains aluminium, iron, carbon, silicon, copper and other impurity, it is characterized in that it is (%) that weight percent is formed:
Aluminium 40～50;
Iron 48～58;
Carbon＜0.05;
Silicon＜2;
Copper＜0.04;
The impurity surplus.
2, the ferroaluminium that is used for the aluminium killed steel deoxidation as claimed in claim 1 is characterized in that it is (%) that weight percent is formed:
Aluminium 44.5～46.5;
Iron 51.5～53.5;
Carbon＜0.03;
Silicon＜0.4;
Copper＜0.04;
Other impurity surplus.
3, the preparation method who is used for the ferroaluminium of aluminium killed steel deoxidation as claimed in claim 1, it comprises batching, melting, casting successively, it is characterized in that:
Said melting 7 steps are in the following order carried out:
Steel material input is added hot melting furnace, melts;
Add oxygenant, carry out decarburization, desiliconization;
Add reductive agent, carry out deoxidation, reducing iron oxides;
The alkaline slag former that adding is made up of fluorite powder 30% and industrial table salt 70% weight percent carries out slag making;
Drop into the aluminium material;
Stir, remove the gred;
Come out of the stove;
The solidification cooling of ferro-aluminum liquation in mold of said casting is greater than 120 ℃/second.
4, the preparation method who is used for the ferroaluminium of aluminium killed steel deoxidation as claimed in claim 1, it comprises batching, melting, casting successively, it is characterized in that said melting 6 steps in the following order carry out:
Steel material and ferric oxide dropped into together add hot melting furnace, melt and decarburization, desiliconization;
Add reductive agent, carry out deoxidation, reducing iron oxides;
The alkaline slag former that adding is made up of fluorite powder 30% and industrial table salt 70% weight percent carries out slag making;
Drop into the aluminium material;
Stir and tremble, remove the gred;
Come out of the stove;
The solidification cooling of ferro-aluminum liquation in mold of said casting is greater than 120 ℃/second.
5, the preparation method of ferroaluminium according to claim 3 is characterized in that said oxygenant, is ferric oxide, or air, or oxygen.
6, according to the preparation method of claim 3 or 4 described ferroaluminiums, it is characterized in that said reductive agent, is ferrosilicon, or ferro-silicon-aluminium, or ferro-aluminum, or fine aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111237 CN1030617C (en) | 1994-02-02 | 1994-02-02 | Al-Fe alloy using for aluminum steel deoxidation and method for prepn. of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111237 CN1030617C (en) | 1994-02-02 | 1994-02-02 | Al-Fe alloy using for aluminum steel deoxidation and method for prepn. of same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093413A CN1093413A (en) | 1994-10-12 |
| CN1030617C true CN1030617C (en) | 1996-01-03 |
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| CN 94111237 Expired - Lifetime CN1030617C (en) | 1994-02-02 | 1994-02-02 | Al-Fe alloy using for aluminum steel deoxidation and method for prepn. of same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100357454C (en) * | 2005-07-01 | 2007-12-26 | 本溪冶炼集团有限公司 | Ferro-aluminium alloy with low carbon, low phosphor and low sulphur content for final deoxidizer in steelmaking |
| CN102888491A (en) * | 2011-07-18 | 2013-01-23 | 江苏正达炉料有限公司 | Preparation method of composite medium aluminium |
| CN102352454B (en) * | 2011-08-31 | 2013-06-19 | 江苏江南铁合金有限公司 | Al-Fe alloy with low H, N and O element contents and preparation method thereof |
| CN103695724B (en) * | 2013-12-13 | 2015-10-28 | 江苏正达炉料有限公司 | A kind of preparation technology of aluminum iron alloy wire |
| CN105734201B (en) * | 2016-04-01 | 2018-05-25 | 武汉宏钢晟科技发展有限公司 | A kind of alfer, preparation method and the usage |
| CN105671412A (en) * | 2016-04-01 | 2016-06-15 | 广东韶钢工程技术有限公司 | Production process for aluminum iron alloy for steelmaking deoxygenation |
| CN107267813A (en) * | 2017-05-22 | 2017-10-20 | 江苏江南铁合金有限公司 | Aluminium ingot production alfer preparation method is converted in molten steel punching |
| CN108823356A (en) * | 2018-06-15 | 2018-11-16 | 甘肃东兴铝业有限公司 | A kind of production method of deoxidation alfer |
| CN108929934B (en) * | 2018-07-03 | 2020-05-26 | 北京北冶功能材料有限公司 | Decarburization smelting method of iron-nickel alloy reclaimed material |
| CN111218541A (en) * | 2020-03-04 | 2020-06-02 | 湛江申翰科技实业有限公司 | High-strength spherical composite deoxidizer and preparation method thereof |
| CN111663058B (en) * | 2020-06-28 | 2021-06-01 | 沈阳航空航天大学 | Fe-Al alloy used as aluminum alloy additive and preparation method and application thereof |
| CN115707785A (en) * | 2022-12-01 | 2023-02-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Smelting process for producing square billet aluminum killed steel by slagging-off before LF (ladle furnace) refining |
-
1994
- 1994-02-02 CN CN 94111237 patent/CN1030617C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093413A (en) | 1994-10-12 |
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