CN104087720A - Aluminum base alloy for steelmaking and preparation method thereof - Google Patents
Aluminum base alloy for steelmaking and preparation method thereof Download PDFInfo
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- CN104087720A CN104087720A CN201410338367.4A CN201410338367A CN104087720A CN 104087720 A CN104087720 A CN 104087720A CN 201410338367 A CN201410338367 A CN 201410338367A CN 104087720 A CN104087720 A CN 104087720A
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Abstract
The invention discloses an aluminum-based calcium-magnesium alloy for steelmaking. A preparation method of the aluminum-based calcium-magnesium alloy comprises the following step: by taking metals aluminum, calcium and magnesium as raw materials, preparing the aluminum-based calcium-magnesium alloy through a remelting process. The aluminum-based alloy is an aluminum-calcium-magnesium alloy in which aluminum serves as a principle component, calcium serves as an auxiliary material and the amount of magnesium is small. The alloy comprises the following components: 70-95 percent of aluminum and the balance of calcium, magnesium and inevitable impurities. According to the aluminum-calcium-magnesium alloy, magnesium and calcium are proportioned according to a certain ratio. The aluminum-based aluminum-calcium-magnesium alloy is used for steelmaking, and has a good deoxidization effect and an excellent desulfurization effect. The alloy is high in deoxidization speed in molten steel, the deoxidization product is low-melting-point calcium aluminate and is easy to float and remove, the fluidity of the molten steel and nozzle clogging are improved, and smooth continuous casting and rolling is guaranteed.
Description
Technical field
The present invention relates to a kind of aluminum base alloy and preparation method for making steel, belong to metallurgical material technology.
Background technology
Aluminium, calcium, magnesium etc. are the strong deoxidization desulfuration elements of steel-making.They are made to alloy is good deoxidization desulfuration agent for making steel.
The technical scheme of preparing at present aluminium calcium-magnesium alloy is many.The aluminium calcium-magnesium alloy of one class iron content.As: aluminium calcium iron, magnalium iron, aluminium Ca, Mg and Fe. this class alloy, for increasing the proportion of alloy, contains iron in alloy.When making, because fusing point is different, the fusing point of iron is more than 1500 ℃, and the low 860 ℃ of just burnings below of the fusing point of aluminium, calcium, magnesium and burning-point are difficult to form alloy, and calcium and magnesium scaling loss are large, increase the cost of alloy.
One class is calcic >=30%(mass percent, as follows) kalzium metal or the aluminium calcium-magnesium alloy of high calcium.In this class alloy, calcic is high, and vapour pressure is large, and for making steel, scaling loss is large, and utilization ratio is low.
Another kind of is in raffinal calcium alloy, aluminum magnesium alloy, aluminium calcium-magnesium alloy, require impurity C, S, P ≈ O, Si≤1%, selecting such raw material must be also aluminium, magnesium and the calcium etc. of high Pure, production cost is high. and make in addition in alloy process, also having unavoidably these impurity and enter alloy, be difficult to production high purity alloys.High purity alloys also exceeds the impurity standard (C≤0.5%, S and P≤0.03%, Si≤2%) of alloy for steel-making.Produce aluminium calcium-magnesium alloy and do not contain or contain less iron (Fe≤5%), aluminium, calcium, magnesium proportioning science, utilization ratio is high, and production cost is low, and meeting the needed aluminium calcium-magnesium alloy of deoxidation in steel making desulfurization is object of the present invention.
Summary of the invention
The quality proportioning of aluminium base aluminium calcium-magnesium alloy of the present invention, it is to take Al as the main 70%-95% that accounts for alloy total amount, more than be to be calcium and magnesium and inevitable impurity.Mg：Ca≈1：2-6。In impurity, contain C≤0.5%, S≤0.03%, P≤0.02%, Si≤2%, Fe≤5% etc.
In aluminium base aluminium calcium-magnesium alloy, be to take aluminium as main, calcium is auxiliary alloy, for deoxidation in steel making, not only deoxidizing capacity is strong, and deoxidation products easily generates the bits of low melting point (1400 ℃ of left and right) calcium aluminate, easily floating and removal. change traditional steelmaking aluminum deoxidation and produce high-melting-point aluminium sesquioxide, in steel, generate new inclusion, must carry out modifying process with calcium.Aluminium in alloy is greater than 70%, and in restriction alloy, calcium contents is less than 20%, and remainder is magnesium and impurity, prevents that alloy from, because high calcium causes vapour pressure greatly and the high problem of burn out rate, improving alloy utilization ratio.
Magnesium calcium in aluminium calcium-magnesium alloy is than being 1:2-6, and magnesium, calcium is strong desulfurization element all, but magnesium sweetening power is better than calcium, and the sulphur in magnesium and molten steel easily generates magnesium sulfide slagging. with magnesium, can first deviate from residual sulphur in molten steel like this, the deoxidizing capacity of protection calcium aluminium.By such alloying constituent proportioning, the product that is conducive to the deoxidation of aluminium calcium generates the calcium aluminate of low melting point, slagging floating and removal.Improve fluidity molten steel and nozzle clogging, assurance continuous casting and rolling is carried out smoothly simultaneously.Aluminium base aluminium calcium-magnesium alloy is the strong deoxidization desulfuration agent of the steel grades such as aluminium killed steel, high quality steel, special steel, high temperature steel.
Preparation method of the present invention is: take metallic aluminium (standard aluminum or secondary aluminum), calcium metal (electrolysis calcium or go back protocalcium), MAGNESIUM METAL is raw material, by proportioning remelting in smelting furnace, makes aluminium calcium-magnesium alloy.Aluminium base aluminium calcium-magnesium alloy is produced easy, and raw materials for production scaling loss is few, reduces production costs.Due to this alloy melting point low (800 ℃ of left and right), in molten steel, deoxidization desulfuration is swift in response, deoxidization desulfuration reaches Schwellenwert.
The iron containing in alloy is by starting material and produces Work tool and bring into.
Aluminium base aluminium calcium-magnesium alloy need to can be made into different shape according to steel-making, as: square, nahlock, line segment, line etc.
Embodiment
below by specific embodiment explanation the present invention.
Embodiment 1
Ratio of components: aluminium (Al98%) 100kg, go back protocalcium (Ca96%) 20kg, MAGNESIUM METAL (Mg99%) 5kg, in throwing smelting furnace, melting is 45 minutes, the moulding of coming out of the stove.Chemical examination alloying constituent: Al 75%, Ca 16%, Mg 4%.Impurity: C 0.3%, S 0.02%, P 0.01%, Si 1.5%, Fe 3.0%.
Embodiment 2
Ratio of components: aluminium ingot 100kg, goes back protocalcium 10kg, magnesium ingot 3kg.Remelted alloy changes into minute: Al 85.2%, Ca 8.4%, Mg 2.5%.Impurity: C 0.3%, S 0.02%, P 0.01%, Si 1.2%, Fe 2.1%.
Embodiment 3
Ratio of components: aluminium ingot 100kg, electrolysis calcium 5kg, MAGNESIUM METAL 2kg.Remelted alloy composition: Al 90.6%, Ca 4.4%, Mg 1.5%.Impurity: C 0.2%, S 0.02%, P 0.01%, Si 1.4%, Fe 1.8%.This alloy is suitable for aluminum steel processed (wire rod), and in alloy, containing magnesium > 5%, line hardness processed is large, and feeding wire machine is difficult to use.
Embodiment 4
Certain steel mill produces Cr
3si steel, with the aluminium calcium-magnesium alloy of example 1, ton steel adds 2.5kg, O content 15ppm in steel, S, P be < 0.03%.Other indexs all reach GB requirement.Ton steel reduces production costs 2 yuan, and fluidity molten steel is good, mouth of a river non-nodulating, and continuous casting and rolling is smooth.
Claims (3)
1. for aluminum base alloy and its technical characterictic of preparation method of making steel, be: use For Remelting Metals legal system for aluminium base aluminium calcium-magnesium alloy.
2. in aluminium calcium-magnesium alloy, aluminium accounts for alloy total mass per-cent 70%-95%, and surplus is calcium and magnesium and inevitable impurity.
3. in aluminium calcium-magnesium alloy, magnesium is 1:2-6 with the ratio of calcium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410338367.4A CN104087720A (en) | 2014-07-16 | 2014-07-16 | Aluminum base alloy for steelmaking and preparation method thereof |
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| CN201410338367.4A CN104087720A (en) | 2014-07-16 | 2014-07-16 | Aluminum base alloy for steelmaking and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151721A (en) * | 2020-03-05 | 2020-05-15 | 谢应凯 | Method for preparing molten steel purifying agent |
| CN112501477A (en) * | 2020-11-06 | 2021-03-16 | 郭鸿鼎 | Micro-carbon low-sulfur high-aluminum iron-free aluminum-magnesium-calcium alloy deoxidizer and preparation method and application thereof |
| CN113652577A (en) * | 2021-07-06 | 2021-11-16 | 福建祥鑫股份有限公司 | AL-Ca alloy and manufacturing method thereof |
| CN115449671A (en) * | 2022-09-07 | 2022-12-09 | 谢应凯 | Preparation method of steelmaking refining modifier |
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| DE2447918A1 (en) * | 1974-10-08 | 1976-04-29 | Gammal Tarek Prof Dr Ing El | Refining of steel - by using an alloy of calcium, aluminium and magnesium free of oxide |
| HU194947B (en) * | 1984-10-19 | 1988-03-28 | Vasipari Kutato Fejleszto | Desulphurizing alloy containing magnesium foriron r iron-base melts |
| CN1831148A (en) * | 2005-10-26 | 2006-09-13 | 李兴有 | Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking |
| CN1974796A (en) * | 2006-12-20 | 2007-06-06 | 陈恩泽 | Composite deoxidant-Al-Mg-Ca-Fe alloy and its prepn |
| CN101121952A (en) * | 2007-10-10 | 2008-02-13 | 本溪冶炼集团有限公司 | Micro-carbon, low-silicon, low-phosphor and low-sulphur aluminum-magnesium-calcium-iron alloy used for smelting steel and deoxidizing |
| CN102605143A (en) * | 2011-01-25 | 2012-07-25 | 宝山钢铁股份有限公司 | Aluminum-magnesium-calcium alloy and application thereof in controlling stainless steel impurities |
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2014
- 2014-07-16 CN CN201410338367.4A patent/CN104087720A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| DE2447918A1 (en) * | 1974-10-08 | 1976-04-29 | Gammal Tarek Prof Dr Ing El | Refining of steel - by using an alloy of calcium, aluminium and magnesium free of oxide |
| HU194947B (en) * | 1984-10-19 | 1988-03-28 | Vasipari Kutato Fejleszto | Desulphurizing alloy containing magnesium foriron r iron-base melts |
| CN1831148A (en) * | 2005-10-26 | 2006-09-13 | 李兴有 | Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking |
| CN1974796A (en) * | 2006-12-20 | 2007-06-06 | 陈恩泽 | Composite deoxidant-Al-Mg-Ca-Fe alloy and its prepn |
| CN101121952A (en) * | 2007-10-10 | 2008-02-13 | 本溪冶炼集团有限公司 | Micro-carbon, low-silicon, low-phosphor and low-sulphur aluminum-magnesium-calcium-iron alloy used for smelting steel and deoxidizing |
| CN102605143A (en) * | 2011-01-25 | 2012-07-25 | 宝山钢铁股份有限公司 | Aluminum-magnesium-calcium alloy and application thereof in controlling stainless steel impurities |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151721A (en) * | 2020-03-05 | 2020-05-15 | 谢应凯 | Method for preparing molten steel purifying agent |
| CN112501477A (en) * | 2020-11-06 | 2021-03-16 | 郭鸿鼎 | Micro-carbon low-sulfur high-aluminum iron-free aluminum-magnesium-calcium alloy deoxidizer and preparation method and application thereof |
| CN113652577A (en) * | 2021-07-06 | 2021-11-16 | 福建祥鑫股份有限公司 | AL-Ca alloy and manufacturing method thereof |
| CN113652577B (en) * | 2021-07-06 | 2022-06-10 | 福建祥鑫新材料科技有限公司 | AL-Ca alloy and manufacturing method thereof |
| CN115449671A (en) * | 2022-09-07 | 2022-12-09 | 谢应凯 | Preparation method of steelmaking refining modifier |
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Application publication date: 20141008 Assignee: Benxi Yuxin furnace charge Co., Ltd. Assignor: Xie Tingsheng Contract record no.: 2015990000475 Denomination of invention: Aluminum base alloy for steelmaking and preparation method thereof License type: Common License Record date: 20150617 |
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Application publication date: 20141008 Assignee: Benxi Jincheng furnace charge Co., Ltd. Assignor: Xie Tingsheng Contract record no.: 2015990000524 Denomination of invention: Aluminum base alloy for steelmaking and preparation method thereof License type: Common License Record date: 20150702 |
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