CN1284868C - Preparation method of composite deoxidizer-silicon-aluminum-barium-calcium-manganese-iron alloy for steelmaking - Google Patents
Preparation method of composite deoxidizer-silicon-aluminum-barium-calcium-manganese-iron alloy for steelmaking Download PDFInfo
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- CN1284868C CN1284868C CN 200510046386 CN200510046386A CN1284868C CN 1284868 C CN1284868 C CN 1284868C CN 200510046386 CN200510046386 CN 200510046386 CN 200510046386 A CN200510046386 A CN 200510046386A CN 1284868 C CN1284868 C CN 1284868C
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000009628 steelmaking Methods 0.000 title abstract description 11
- 239000002131 composite material Substances 0.000 title abstract description 10
- 229910000640 Fe alloy Inorganic materials 0.000 title abstract 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011575 calcium Substances 0.000 claims abstract description 27
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 229910000600 Ba alloy Inorganic materials 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000004411 aluminium Substances 0.000 claims description 24
- 229910052791 calcium Inorganic materials 0.000 claims description 14
- 229910052788 barium Inorganic materials 0.000 claims description 11
- 239000011572 manganese Substances 0.000 claims description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 5
- 235000019580 granularity Nutrition 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- -1 silicon-aluminum-barium-calcium-manganese-iron Chemical compound 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 3
- 239000010962 carbon steel Substances 0.000 abstract description 3
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229910000882 Ca alloy Inorganic materials 0.000 abstract 1
- 229910000616 Ferromanganese Inorganic materials 0.000 abstract 1
- 229910000746 Structural steel Inorganic materials 0.000 abstract 1
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 abstract 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 238000006253 efflorescence Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010037844 rash Diseases 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical compound [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a composite deoxidizer for steelmaking, namely a silicon-aluminum-barium-calcium-manganese-iron alloy and a preparation method thereof, belonging to the technical field of steelmaking. The composite deoxidizer for steelmaking comprises the following chemical components in percentage by weight: 10-35% of Si, 5-15% of Al, 4-14% of Ba, 4-14% of Ca, 2-10% of Mn, and the balance of Fe and inevitable impurities. The preparation method comprises the following steps: the method comprises the steps of adopting an intermediate frequency furnace or a power frequency furnace, putting scrap steel and 3/2 aluminum ingots into a furnace bottom according to a certain proportion, then adding silicon-barium alloy, silicon-calcium alloy, medium-carbon ferromanganese and ferrosilicon alloy, adding the rest aluminum ingots after all the scrap steel and the aluminum ingots are melted, fully stirring and melting the aluminum ingots, and discharging the aluminum ingots out of the furnace to obtain the compound deoxidizer-silicon-aluminum-barium-calcium-manganese-iron alloy for steelmaking with required chemical components. The deoxidizer has a high specific gravity (3.5-4.5 g/cm)3) The composite deoxidizer has low melting point (1050-1200 ℃), fine and hard crystallization, and can effectively improve the comprehensive performance of steel when being used for smelting low-alloy structural steel and carbon steel.
Description
Technical field
The invention belongs to steelmaking technical field, particularly a kind of complex deoxidizer for steelmaking-Si-Al-Ba-Ca manganeseirom and preparation method thereof.
Background technology
The process of steel-making is to make molten iron carry out decarburization and remove the process of detrimental impurity such as phosphorus, sulphur with oxygen blast or the method that adds oxygenant.The carrying out of this process, though the pig iron is smelt steel, [O] content in the steel has increased.Particularly as the IF steel, reach 0.02～0.03% for making the carbon amount, the oxygen in the steel will be increased to 0.08～0.1%.[O] generally exists with the form of [FeO] and oxide compound thereof in molten steel, before the cast strand as can not in time purge, the fatigue characteristic of steel, processing characteristics, ductility, toughness, welding property, anti-HIC performance, corrosion resistance nature etc. all there is remarkable influence.Therefore, need to add some alloying elements stronger than iron (reductor) and carry out deoxidation with oxygen combining power.For many years, the industrial aluminium that always uses comes deoxidation, and aluminium is the very strong metal of a kind of deoxidizing capacity, deoxidation products Al
2O
3Come-up is fast, is easy to remove.But Al
2O
3Be mingled with for indeformable, performance impact to some steel is bigger, as super deep-draw autobody sheet and DI jar steel plate (oxygen level is lower than 0.003%), radial drawn wire and bridge suspension cable with drawn wire (oxygen level is lower than 0.002%) etc., because these steel are very low to the content requirement of aluminium, so should not use aluminium deoxidation, therefore, people begin other alloys on probation and come deoxidation, as: aluminium-manganese-iron, aluminium-manganese-titanium, aluminium-manganese-silicon, silicon-calcium-barium, silicon-barium-aluminium or the like.These alloys have his own strong points, and shortage is respectively arranged.The aluminium content that has still very high (30～40%), the crystal grain thinning that has is not ideal enough.The easy efflorescence that has, desulfurization, dephosphorization effect difference etc., and most of reductor manufacturer uses is the hot stove production in ore deposit, because the ore deposit disposable production cost of hot stove is lower, but the composition of alloy is difficult to precise control, does not often reach the effect of anticipation.
Summary of the invention
The purpose of this invention is to provide a kind of with silicon, aluminium, barium, calcium, manganeseirom a kind of complex deoxidizer for steelmaking-Si-Al-Ba-Ca manganeseirom that to be main raw material produce with addition of steel scrap and preparation method thereof.
According to complex deoxidizer for steelmaking of the present invention-Si-Al-Ba-Ca manganeseirom, its Chemical Composition (weight %) is: Si 10～35%, and Al 5～15%, and Ba 4～14%, and Ca 4～14%, and Mn 2～10%, and surplus is Fe and unavoidable impurities.
Described alloy composition (weight %) is: Si 32%, and Al 10%, and Ba 9%, and Ca 9%, and Mn 6.5%, and all the other are iron.
The preparation method of complex deoxidizer for steelmaking of the present invention-Si-Al-Ba-Ca manganeseirom is:
A) take by weighing following proportion raw material:
5～10 kilograms of siliceous 75% ferro-silicons, 10～13 kilograms of industrial aluminium ingots that contain aluminium 95～98%, 25～38 kilograms of the Si-Ba alloys of siliceous 30～50%, barium 25～30%, 25～38 kilograms of the silicocalcium of siliceous 30～50%, calcium 25～30%, contain 10～20 kilograms of 8～10 kilograms of the mid-carbon fe-mns of manganese 75～78% and steel scraps, various alloy granularities are 20～50mm.
B) preparation method:
Adopt intermediate frequency furnace or main frequency furnace, at first get the steel scrap of said ratio and the aluminium ingot of whole alumiunum amount 2/3 and put into furnace bottom, add Si-Ba alloy, silicocalcium, mid-carbon fe-mn, ferro-silicon then, carry out heating and melting, treat to add the industrial aluminium ingot of residue again after all fusings, through fully coming out of the stove after stirring, the fusion, can make the Si-Al-Ba-Ca manganeseirom of required chemical ingredients.
Silicon in the composite deoxidant provided by the invention and aluminium are a kind of stronger oxyphilic elements, and barium is a kind of active alkaline-earth metal, oxygen and sulphur are had very big avidity, and the impurity ability is strong in the removal steel, and the deoxidation products of formation, inclusion are easy to float to enter in the slag in the fused molten steel remove.Simultaneously because the existence of barium, reduced the vapour pressure of calcium, make the solubleness of calcium increase greatly, calcium makes number one in deoxidant element, and also very strong with the avidity of sulphur, so approaching, calcium can improve deoxidation effect, also can play desulfidation, thereby can make the inclusion modification in the steel, very favourable to improving comprehensive properties of rolled steel.In addition, calcium also makes deoxidation products form more low-melting calcium-aluminate, and come-up is removed easily in molten steel, and nozzle clogging when avoiding pouring molten steel is very favourable to continuous casting.The effect of manganese mainly is to prevent the efflorescence of si-al-ba-fe and spontaneous combustion, and the proportion of Mn is bigger simultaneously, is beneficial to reductor and sinks to molten steel, reduces scaling loss.Therefore, the present invention has than great (3.5～4.5g/cm
3), fusing point low (1050～1200 ℃), advantage such as crystallization is careful, hard is especially used this composite deoxidant when smelting structural low and carbon steel, can improve comprehensive properties of rolled steel effectively.
Embodiment
Further specify the specific embodiment of the present invention below in conjunction with embodiment.
According to complex deoxidizer for steelmaking of the present invention-Si-Al-Ba-Ca manganeseirom, its Chemical Composition (weight %) is:
Si 10～35%, and Al 5～15%, and Ba 4～14%, and Ca 4～14%, and Mn 2～10%, and surplus is Fe and unavoidable impurities.
The preparation method of complex deoxidizer for steelmaking of the present invention-Si-Al-Ba-Ca manganeseirom is:
A) take by weighing following proportion raw material:
5～10 kilograms of siliceous 75% ferro-silicons, 10～13 kilograms of industrial aluminium ingots that contain aluminium 95～98%, 25～38 kilograms of the Si-Ba alloys of siliceous 30～50%, barium 25～30%, 25～38 kilograms of the silicocalcium of siliceous 30～50%, calcium 25～30%, contain 10～20 kilograms of 8～10 kilograms of the mid-carbon fe-mns of manganese 75～78% and steel scraps, various alloy granularities are 20～50mm.
B) preparation method:
Adopt intermediate frequency furnace or main frequency furnace, at first get the steel scrap of said ratio and the aluminium ingot of total industrial aluminium ingot amount 2/3 and put into furnace bottom, add Si-Ba alloy, silicocalcium, mid-carbon fe-mn, ferro-silicon then, carry out heating and melting, treat to add the industrial aluminium ingot of residue again after all fusings, through fully coming out of the stove after stirring, the fusion, can make the composite deoxidant-Si-Al-Ba-Ca manganeseirom of required chemical ingredients.
Embodiment 1:
Described alloy composition (weight %) is: Si 32%, and Al 10%, and Ba 9%, and Ca 9%, Mn6.5%, and all the other are iron, and various alloy granularities are 20～50mm, and various alloy granularities are 20～50mm.
Its preparation method is:
Press silicocalcium (Ca28%, Si 50%) 33 kilograms, (Ba 27% for Si-Ba alloy, Si 46%) 35 kilograms, 9 kilograms of mid-carbon fe-mns (Mn 77%), 11 kilograms of industrial aluminium ingots that contain aluminium 95～98%, 12 kilograms of ratio batchings of steel scrap, add fusion in 1.5 tons of main frequency furnaces, at first the steel scrap and industrial aluminium ingot 2/3 ratio of aforementioned proportion are put into furnace bottom, add Si-Ba alloy then, silicocalcium, mid-carbon fe-mn, ferro-silicon carries out heating and melting, treats to add the industrial aluminium ingot of residue again after all fusings, through fully stirring, tapping casting after the fusion, further be crushed to 20～50mm after the cooling, promptly make Chemical Composition (weight %) and be: Si 32%, and Al 10%, Ba 9%, Ca 9%, and Mn 6.5%, and all the other are the composite deoxidant-Si-Al-Ba-Ca manganeseirom of iron.
This composite deoxidant crystallization is careful, hard, fusing point is low (1050～1200 ℃), proportion 3.5～4.5g/cm
3With structural low and carbon steel that this composite deoxidant is smelted, [O] in the steel can reach below the 35ppm; [S] content can reach below 0.03%, and grain fineness number reaches more than 85% more than 10 grades, and mechanical property obviously improves, and tensile strength is than improving 30～70MPa with other reductors; The section elongation improves 3～5%.
Claims (1)
1, the preparation method of a kind of complex deoxidizer for steelmaking-Si-Al-Ba-Ca manganeseirom is characterized in that:
A) take by weighing following proportion raw material:
5～10 kilograms of siliceous 75% ferro-silicons, 10～13 kilograms of industrial aluminium ingots that contain aluminium 95～98%, 25～38 kilograms of the Si-Ba alloys of siliceous 30～50%, barium 25～30%, 25～38 kilograms of the silicocalcium of siliceous 30～50%, calcium 25～30%, contain 10～20 kilograms of 8～10 kilograms of the mid-carbon fe-mns of manganese 75～78% and steel scraps, various alloy granularities are 20～50mm
B) preparation method:
Adopt intermediate frequency furnace or main frequency furnace, at first get the steel scrap of said ratio and the aluminium ingot of whole alumiunum amount 2/3 and put into furnace bottom, add Si-Ba alloy, silicocalcium, mid-carbon fe-mn, ferro-silicon then, carry out heating and melting, treat to add the industrial aluminium ingot of residue again after all fusings, through fully stirring, all coming out of the stove after the fusion, can make the complex deoxidizer for steelmaking-Si-Al-Ba-Ca manganeseirom of required chemical ingredients.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046386 CN1284868C (en) | 2005-05-07 | 2005-05-07 | Preparation method of composite deoxidizer-silicon-aluminum-barium-calcium-manganese-iron alloy for steelmaking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046386 CN1284868C (en) | 2005-05-07 | 2005-05-07 | Preparation method of composite deoxidizer-silicon-aluminum-barium-calcium-manganese-iron alloy for steelmaking |
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|---|---|
| CN1693486A CN1693486A (en) | 2005-11-09 |
| CN1284868C true CN1284868C (en) | 2006-11-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102344992A (en) * | 2011-07-08 | 2012-02-08 | 南阳汉冶特钢有限公司 | Composite deoxidizer used in steelmaking and use method thereof |
| CN113249549B (en) * | 2021-05-18 | 2023-01-31 | 鞍钢实业集团有限公司冶金资源再生利用分公司 | Aluminum-manganese-calcium-barium-magnesium-iron alloy for steelmaking and manufacturing method thereof |
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