CN102839292A - Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy - Google Patents
Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy Download PDFInfo
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 34
- -1 Aluminum iron Chemical compound 0.000 title claims abstract description 32
- 239000010936 titanium Substances 0.000 title claims abstract description 32
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 31
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910000655 Killed steel Inorganic materials 0.000 title claims abstract description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 17
- 239000010703 silicon Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- 229910000640 Fe alloy Inorganic materials 0.000 title abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 67
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052742 iron Inorganic materials 0.000 claims abstract description 37
- 239000012535 impurity Substances 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011574 phosphorus Substances 0.000 claims abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 5
- 239000004411 aluminium Substances 0.000 claims description 51
- 239000002893 slag Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000005864 Sulphur Substances 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 7
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L Calcium fluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 238000007792 addition Methods 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910000967 As alloy Inorganic materials 0.000 claims description 2
- REHXRBDMVPYGJX-UHFFFAOYSA-H Sodium hexafluoroaluminate Chemical compound [Na+].[Na+].[Na+].F[Al-3](F)(F)(F)(F)F REHXRBDMVPYGJX-UHFFFAOYSA-H 0.000 claims description 2
- 238000009847 ladle furnace Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 17
- 239000000956 alloy Substances 0.000 abstract description 17
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 41
- 239000010959 steel Substances 0.000 description 41
- 238000007254 oxidation reaction Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000006392 deoxygenation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 229910018619 Si-Fe Inorganic materials 0.000 description 4
- 229910008289 Si—Fe Inorganic materials 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001965 increased Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003245 working Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 229910000460 iron oxide Inorganic materials 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Abstract
The invention belongs to the technical field of metallurgy and particularly relates to an aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and a manufacturing method of the aluminum iron alloy. The alloy contains aluminum, iron, silicon and impurities, and is characterized in that the alloy comprises the following components by weight percentage: 20%-30% of aluminum, 45%-55% of silicon, 22%-28% of iron and the balance of impurities. The impurities comprise the components by weight percentage: less than 0.008% of carbon, less than 0.02% of phosphorus, less than 0.02% of sulfur, less than 0.05% of copper, less than 0.005% of titanium, less than 1.0% of manganese and less than 0.05% of nitrogen. The manufacturing method comprises the steps of burdening, melting and casting. The alloy has the advantages of ultra-low titanium content, ultra-low carbon content, low impurity content and the like, and particularly meets the requirement of the aluminum iron killed steel on the ultra-low titanium and ultra-low carbon contents of a deoxidier.
Description
Technical field
The invention belongs to technical field of smelting, be specifically related to a kind of high Alsimin of ultralow titanium Ultra-low carbon that is applicable to the aluminium-silicon killed steel deoxidation and preparation method thereof.
Background technology
In recent years, purity has become aluminium-silicon killed steels such as important directions, especially an electrical steel improving the steel products quality, bearing steel, spring steel.As everyone knows, non-metallic inclusion can have a negative impact to various performances, work-ing life and the surface quality of steel in the molten steel, thereby the content of non-metallic inclusion has become an important research direction in the control molten steel.And the generation of non-metallic inclusion and reductor have confidential relation in the molten steel.The deoxidation products of reductor and impurities are the main sources of non-metallic inclusion in the molten steel.
Because Ti and O, N element have stronger avidity, the three is easy to form compound in the steel-making, generates microinclusions TiO
XWith TiN etc.These microinclusions can cause continous casting sprue dross or mold knot fish, and then influence all kinds of performances of steel.Therefore, the aluminium-silicon killed steel that inclusion content is had a particular requirement has proposed strict requirement to the Ti amount that contains of reductor, hopes to be less than or equal to 100ppm even 50ppm.
When reality was smelted aluminium-silicon killed steel, the composition of stokehold steel was qualified, but after adding reductor, carbon content and impurity have just risen, particularly carbon content.Major cause is exactly that general aluminium-silicon killed steel has passed through RH stove carbonization treatment before final deoxygenation, and carbon content is below 100ppm, if the end-deoxidizer carbon content surpasses 0.01%, and will be to molten steel recarburization.So the carbon content to end-deoxidizer has also proposed increasingly high requirement.In like manner along with the lifting of stokehold steel quality, the qualification of foreign matter contents such as other sulphur, phosphorus, copper is also more and more stricter.
Present stage, steel mill mostly adopted pure aluminum and ferroaluminium to the aluminium-silicon killed steel deoxidation.Aluminium is a kind of strong reductor, but less owing to aluminium density in the melting deoxidation process, the buoyancy in molten steel is bigger; It is inner to be difficult for getting into molten steel; Most of in molten steel surface oxidation scaling loss, had a strong impact on it utilization ratio, increased the consumption of aluminium, improved production cost; Waste bauxite resource, be unfavorable for improving the economic benefit of steel mill.And the density of ferro-aluminum is big, is easy to go deep into molten steel inside, improves the yield of aluminium.Therefore, ferro-aluminum is to substitute the optimal selection that fine aluminium carries out deoxidation.Because after the deoxidation of aluminium-silicon killed steel liquid process RH stove, the amount of carrying out deep deoxidation (final deoxygenation) through adding ferro-aluminum reductor is considerably less, so the consumption of reductor is also few.And the concentration of aluminium is high in the ferroaluminium, and the ferro-aluminum amount that adds so is just few, also just is not easy in a large amount of molten steel, to be uniformly distributed with, and causes deoxidation effect poor, and the aluminium utilization ratio is low, and inclusion is many.So the content to aluminium in the ferro-aluminum need not be very high, and hope that the content of iron improves as far as possible, obtain bigger alloy density and more alloy addition, make alloy more deeply to be absorbed by the molten steel fusing more uniformly.The content of aluminium neither be low more good more, otherwise the ferroaluminium add-on increases severely the cost increase.According to the production practice of steel mill, about 20% ferroaluminium is the deoxidation demand that density or input amount all are fit to aluminium-silicon killed steel very much.Because the content of the aluminium in the ferroaluminium is 30% when following, density significantly improves, and broken unusual difficulty can't not satisfy the grade requirement of steel mill and do not carry out fragmentation.So the general aluminium content of commercially available iron alloy is all greater than 40%.Experiment finds that the silicon of introducing content 4-7% in the ferroaluminium can significantly improve the fragility of alloy, makes fragmentation be easy to carry out.And silicon can't pollute molten steel as the element that certainly exists of aluminium-silicon killed steel, and obviously AL-Si-Fe alloy is more suitable for the final deoxygenation in aluminium-silicon killed steel.
At present, the working method of commercially available ferroaluminium is mainly remelting process.This type of remelting process generally adopts intermediate frequency or main frequency furnace fusing molten steel, progressively drops into cold aluminium ingot in the stove then, and molten back slag making is to the greatest extent stirred slagging-off and come out of the stove.The shortcoming of this method is: 1, the aluminium burn out rate is high, generally more than 2.5%; 2, tap to tap time long, the furnace lining fouling is serious, alloy inclusions content is high; 3, energy consumption is high.Liquid steel temperature is between 1500-1600 ℃, and the fusing point of aluminium is about 660 ℃, and cold aluminium ingot gets into molten iron can only swim in the liquid level fusing, causes the scaling loss of aluminium to increase.And the mode of the aluminium ingot that progressively adds is consuming time, causes tap to tap time long, and the ferro-aluminum oxidation seriously causes slag fouling on furnace lining, significantly increases the inclusion in the alloy simultaneously.The heat that the ferro-aluminum reaction generates can not make full use of, and tap to tap time is long, and energy consumption is obviously higher, and cost rises.
Patent 94111237.3 " being used for ferroaluminium of aluminium killed steel deoxidation and preparation method thereof " adopts intermediate frequency not have the iron core induction furnace to carry out steel scrap and synthesize composition Al40-50%, C＜0.05%, Cu＜0.04%, Si≤2.0%, Fe 48-58% with the aluminium ingot remelting; Patent 03118606.8 ferroaluminium and the preparation method of molten steel final deoxygenation " be used for make steel " adopts intermediate frequency not have the iron core induction furnace to carry out steel scrap and synthesize with the aluminium ingot remelting; Carry out impurity simultaneously and handle, composition is Al40-44%, C＜0.05%; P＜0.08%; S≤0.05%, Si≤1.0%, Fe 54-59%.Patent 200510046795.0 " be used for making steel the trace carbon of end-deoxidizer, low-phosphorous, doctor negative ferroaluminium " adopts electric furnace to carry out remelting production too, and composition is Al60～64%, Si≤1.5%, P≤0.025%, S≤0.025%, C≤0.03%, iron surplus.Patent 200510017089.3 " technology for manufacturing aluminium silicon iron alloy " and patent 200610051148.3 " working method of the direct melting aluminium of the hot stove in a kind of ore deposit, silicon, iron alloy " all adopt the ore deposit raw material production, all do not mention the composition and the impurity of product.
The said ferroaluminium of above patent or AL-Si-Fe alloy and preparation method thereof all can't satisfy the requirement of aluminium-silicon killed steel to composition, titanium content, carbon content and the foreign matter content of reductor.
Summary of the invention
To the problems referred to above, the object of the present invention is to provide a kind of deoxidation effect good, the high Alsimin of ultralow titanium, Ultra-low carbon, low impurity content and the novel method of making above-mentioned alloy are to solve existing technical deficiency.At 45-55%, and impurity is low, is specially adapted to aluminium-silicon killed steels such as electrical steel, bearing steel, spring steel at 20-30%, silicone content for aluminium content among the present invention.
In order to achieve the above object, technical scheme of the present invention is:
Be used for the high Alsimin of ultralow titanium Ultra-low carbon of aluminium-silicon killed steel deoxidation, it contains aluminium, iron, silicon and impurity, it is characterized in that percentage composition by weight (%): aluminium 20-30; Silicon 45-55; Iron 22-28, impurity are surplus.
As further improvement of the present invention: comprise copper, phosphorus, sulphur, carbon, titanium, manganese and nitrogen in the said impurity, percentage composition by weight (%): carbon < 0.008; Phosphorus < 0.02; Sulphur < 0.02; Copper < 0.05; Titanium < 0.005; Manganese < 1.0; Nitrogen < 0.05.
Make the method for the high Alsimin of above-mentioned ultralow titanium Ultra-low carbon, it comprises successively:
(1), batching: selecting iron, raffinal and Pure Silicon Metal for use is raw material;
(2), melting: (a) pure iron fusing:, in pure iron liquid, drop into the Pure Silicon Metal deoxidation and regulate content as alloy addition with the puron fusing;
(b) fine aluminium is put into ladle furnace and carry out preheating, the control aluminum ingot temperature is at 100-300 ℃;
(c) the iron liquid after handling among the step a is poured into described in the step b in the ladle, and mixed fusing;
(d) slag making slagging-off;
(3), casting.
In order to guarantee that product reaches the purpose of ultralow titanium, Ultra-low carbon, low impurity content; In the controlled scope of cost; Titanium, carbon source and other foreign matter content that strict control raw material is introduced are more than the Al99.50 at the trade mark of raffinal described in the selecting materials of step (1); (%) calculating by weight percentage in the said iron: < 0.2, < 0.04, < 0.04, < 0.04, < 0.005, < 1.0, < 0.05, surplus is an iron to nitrogen to manganese to titanium to copper to sulphur to phosphorus to carbon; The trade mark of said Pure Silicon Metal is more than the Si-1.
As further improvement of the present invention, improve the efficient of smelting, the fusing of iron adopts intermediate frequency or main frequency furnace to carry out in the step (a).
In order further to reduce foreign matter content in the product; Said slag making slagging-off is meant that employing carries out slag making by the slag former of fluorite powder 20% and sodium aluminum fluoride 30% and Industrial Salt (NaCl) 50% weight percent in the step (a); Then slag is dragged for to the greatest extent characteristics such as said slag former has and is prone to form first slag, and molten slag is fast; Reduce energy consumption and production costs, when increasing the benefit, promoted the alloy quality.
Innovation part of the present invention is:
1, for the degree of depth final deoxygenation of aluminium-silicon killed steel the high silicon iron alloy that a kind of density is moderate, aluminium content is low reductor is provided.In low ferroaluminium, introduce silicon, solved the broken difficult problem of low ferroaluminium.Ferro-aluminum silicon alloy of the present invention has been broken through the lower limit of aluminium content 40% in the conventional aluminum iron alloy, reaches 20 ~ 30% scope, has improved the density of reductor, has reduced the content of aluminium.The deep enough molten steel of density ambassador's reductor ability thoroughly absorbs, and improves the utilization ratio of aluminium.The low come-up that has reduced aluminium of aluminium content has been accelerated the absorption of aluminium, has improved deoxidation speed, avoids high concentration of aluminium reductor add-on few, the shortcoming of skewness.
2, adopted brand-new melting method among the present invention: iron liquid is poured into mixed melting in the ladle of preliminary drying aluminium ingot.Wash away solid-state aluminium ingot on the one hand a large amount of pure iron water short period of time, mixed melting has avoided high temperature aluminium ingot or aluminium liquid to be exposed to airborne oxidization burning loss for a long time rapidly; The scaling loss that greatly reduces aluminium is few, and the yield of aluminium can reach more than 99.5%, on the other hand because in fusion process; Molten iron has cut off contacting of aluminium ingot and air, and originally aluminum ingot temperature is controlled at 100-300 ℃, and preliminary drying can not produce oxidation; Greatly reduce the degree of oxidation on aluminium ingot surface, obviously reduced the content of oxidation foreign material, and whole process ferro-aluminum fuses the just heat of balance aluminium ingot fusing absorption of liberated heat; Made full use of the reaction heat of iron aluminium, energy consumption obviously descends.The outer blended work simplification of stove of the present invention production process, avoided furnace high-temperature ferroaluminium oxidization burning loss to cause the serious phenomenon of furnace lining slagging scorification.Stove mixes the method for producing the ferro-aluminum silicon alloy outward, has improved utilization ratio and the work-ing life of molten iron with intermediate frequency furnace or main frequency furnace, has stablized the aluminium content of alloy simultaneously.
3, the present invention to the final deoxygenation of aluminium-silicon killed steel, proposes high Alsimin impurity component and meets the requirement of ultralow titanium ultralow-carbon especially.The aluminium-silicon killed steel that is used for producing high-grade steel grades such as electrical steel, bearing steel, spring steel has proposed higher requirement to the content of titanium, content, impurity and the non-metallic inclusion level of carbon.After this type of steel was planted through furnaceman RH, the carbon containing of molten steel, titaniferous, impurity and non-metallic inclusion water article had all reached quite purified degree, and the purity of end-deoxidizer also must adapt with it, otherwise molten steel will be contaminated.The present invention is through the raw materials for production of strict preferred AL-Si-Fe alloy, thereby assurance obtains ultralow titanium, Ultra-low carbon, low impurity, the low pure reductor that is mingled with.
Figure of description
Fig. 1 is a production scheme of the present invention.
Embodiment
Embodiment 1, and is as shown in the figure:
Processing condition adopt 2t intermediate frequency coreless induction process furnace, power 500kw, standard capacity 1500kg; One of the Sweet natural gas heating mantles of 50kw; 1.5t one of preliminary drying ladle.
(1) batching:
The 259kg steel scrap (C:0.15%, P:0.035%, S:0.022%, Cu:0.031%, Ti:0.0050%, manganese: 0.4%, nitrogen: 0.03%)
524 ㎏ Pure Silicon Metals (Si:99.3%, C:0.01%, P:0.010%, S:0.010%, Ti:0.0015%)
259kg aluminium ingot (Al:99.7%)
(2) melting:
1) 259 ㎏ aluminium ingots add in the Sweet natural gas heating ladle, are warming up to 150 ℃.
2) steel scrap adds the intermediate frequency furnace fusing that gas permeable brick is equipped with in the bottom, molten upper back covering slag CaO:16kg to the greatest extent, Al2O3:3.6kg, SiO2:1.5kg; CaF2:8.4kg, open the bottom the argon gas valve, blowing argon gas in stove, simultaneously from top in stove oxygen blast gas; Argon gas feeds iron liquid is fully stirred, with the rising of furnace temperature, and the abundant oxidation of titanium, carbon in the iron liquid; Drag for the slag on most iron liquid surface, obtain carbon: 0.008%, titanium: 0.001% purified iron liquid.
3) carrying out deoxidation in the 524kg Pure Silicon Metal adding molten steel, reducing iron oxides, alloying simultaneously.
4) pour into iron silicon alloy liquid and fill in the aluminium ingot ladle that heats, fully stir.
5) add slag charge.The mix slag former of 0.5kg fluorite powder, carry out slag making with 0.75 ㎏ ice crystal and 1.25kg industrial table salt (NaCl).Drag for the slag after the most processing.
(3) casting.Its processing condition are: adopt the cast alloy iron mould, AL-Si-Fe alloy liquid injects finishing fragmentation behind the naturally cooling in the mould.
According to the batching of present embodiment and the ferroaluminium of melting method gained thereof, its weight percentage is: aluminium: 25.01%, and silicon: 50.11%, iron: 24.8%; Copper: 0.003%, phosphorus: 0.006%, sulphur: 0.001%, carbon: 0.004%; Titanium: 0.0012%, manganese: 0.5%, nitrogen: 0.023.
Claims (8)
1. high Alsimin of ultralow titanium Ultra-low carbon that is used for the aluminium-silicon killed steel deoxidation, it contains aluminium, iron, silicon and impurity, it is characterized in that percentage composition by weight (%): aluminium 20-30; Silicon 45-55; Iron 22-28, impurity are surplus.
2. the high Alsimin of ultralow titanium Ultra-low carbon according to claim 1 is characterized in that: comprise copper, phosphorus, sulphur, carbon, titanium, manganese and nitrogen in the said impurity, percentage composition by weight (%): carbon < 0.008; Phosphorus < 0.02; Sulphur < 0.02; Copper < 0.05; Titanium < 0.005; Manganese < 1.0; Nitrogen < 0.05.
3. method for preparing the high Alsimin of ultralow according to claim 1 or claim 2 titanium Ultra-low carbon, it comprises successively:
(1), batching: selecting iron, raffinal and Pure Silicon Metal for use is raw material;
(2), melting:
(a) pure iron fusing:, in pure iron liquid, drop into the Pure Silicon Metal deoxidation and regulate content as alloy addition with the iron fusing;
(b) fine aluminium is put into ladle furnace and carry out preheating, the control aluminum ingot temperature is at 100-300 ℃;
(c) the iron liquid after handling among the step a is poured into described in the step b in the ladle, and mixed fusing;
(d) slag making slagging-off;
(3), casting.
4. preparation method according to claim 3 is characterized in that: the trade mark of raffinal is more than the Al99.50 described in the step (1).
5. preparation method according to claim 3 is characterized in that: (%) calculating by weight percentage in the said iron in the step (1): < 0.2, < 0.04, < 0.04, < 0.04, < 0.005, < 1.0, < 0.05, surplus is an iron to nitrogen to manganese to titanium to copper to sulphur to phosphorus to carbon.
6. preparation method according to claim 3 is characterized in that: the trade mark of said Pure Silicon Metal is more than the Si-1 in the step (1).
7. preparation method according to claim 3 is characterized in that: the fusing of iron adopts intermediate frequency or main frequency furnace to carry out in the step (a).
8.
preparation method according to claim 3; It is characterized in that: said slag making slagging-off is meant that employing carries out slag making by the slag former of fluorite powder 20% and sodium aluminum fluoride 30% and Industrial Salt (NaCl) 50% weight percent in the step (d), slag is dragged for use up then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210346033 CN102839292A (en) | 2012-07-30 | 2012-09-18 | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210264986 | 2012-07-30 | ||
| CN201210264986.4 | 2012-07-30 | ||
| CN 201210346033 CN102839292A (en) | 2012-07-30 | 2012-09-18 | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289708A (en) * | 2014-09-19 | 2015-01-21 | 杨晓进 | Aluminum iron alloy powder material and method for reducing and degrading nitrate or chlorine disinfection by-products in water with same |
| CN105499526A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Method for reducing total oxygen content of aluminium-killed steel continuous cast first slab |
| WO2016155873A1 (en) | 2015-03-30 | 2016-10-06 | Megalloy Ag | Method for production of iron-silicon-aluminum alloys and their use |
| 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 |
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2012
- 2012-09-18 CN CN 201210346033 patent/CN102839292A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289708A (en) * | 2014-09-19 | 2015-01-21 | 杨晓进 | Aluminum iron alloy powder material and method for reducing and degrading nitrate or chlorine disinfection by-products in water with same |
| CN105499526A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Method for reducing total oxygen content of aluminium-killed steel continuous cast first slab |
| WO2016155873A1 (en) | 2015-03-30 | 2016-10-06 | Megalloy Ag | Method for production of iron-silicon-aluminum alloys and their use |
| CN107429306A (en) * | 2015-03-30 | 2017-12-01 | 梅格阿洛依股份公司 | Production method of sendust and application thereof |
| 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 |
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Application publication date: 20121226 |