CN103741020A - Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent - Google Patents
Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent Download PDFInfo
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- CN103741020A CN103741020A CN201310755242.7A CN201310755242A CN103741020A CN 103741020 A CN103741020 A CN 103741020A CN 201310755242 A CN201310755242 A CN 201310755242A CN 103741020 A CN103741020 A CN 103741020A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a preparation method of a magnesium-aluminum-iron alloy for a desulfurizing and deoxidizing agent. An induction furnace is adopted for smelting, and the method comprises the following steps: adding 30% of the total aluminum to the bottom of the induction furnace; putting all magnesium ingots into the induction furnace; adding the rest aluminum blocks, and adding all metal iron or waste steel; heating until the metal iron or waste steel, aluminum blocks and magnesium ingots are all molten; and adding calcium oxide and a yttrium-iron alloy, and discharging and casting. The alloy can be used as a final desulfurizing and deoxidizing agent for the molten steel and is convenient to use by directly feeding into the molten steel. Since the alloy has higher specific gravity and melting point than elementary magnesium and pure aluminum, the alloy stays longer in the molten steel in deoxidization, the utilization rate is higher, and the cost is lower.
Description
Technical field
The invention belongs to metal material field, refer in field of steel-making for desulfating and deoxidation agent magnesia-alumina-ferroalloy preparation method.
Background technology
Now also more and more higher to requirements such as steel grade purity, uniformity coefficient, grain fineness, require to reduce production costs simultaneously, the over-all properties of steel also increases thereupon.Fine aluminium plays tranquillizer effect in deoxidation process, and aluminium and affinity for oxygen are very strong, and deoxidation efficiency is high, by people's widespread use.But, use fine aluminium or ferroaluminium deoxidation all to have some shortcomings, from physics aspect, aluminium fusing point is low, and density ratio molten steel density is little, in molten steel, easily floats, and scaling loss is larger, and than composite alloy deoxidation, fine aluminium deoxidation utilization ratio is low; From chemical aspect, one, the deoxidation products aluminium sesquioxide in steel is chain, the chain more aluminium sesquioxide particle on long-chain is more intensive, and its plasticity-is very poor, thereby affects the mechanical property of steel; Two, aluminium sesquioxide fusing point, between 2020 ℃～2050 ℃, easily condenses into willow when pouring molten steel, stops up the mouth of a river, is unfavorable for molten steel casting; Three, the reaction product of aluminium deoxidation and remain in the aluminium in steel, often causes the creep brittleness of high temperature steel, reduces the hot strength of steel.So use fine aluminium or ferro-aluminum, do the more and more difficult demand that meets deoxidation in steel making of reductor.
Summary of the invention
The present invention seeks to the magnesia-alumina-ferroalloy that development and operation is easy, fast simple and the magnesium rate of recovery is high, and can meet under commercial production conditions, produce magnesia-alumina-ferroalloy.
The present invention is achieved by the following technical solutions:
A kind of desulfating and deoxidation agent by magnesia-alumina-ferroalloy preparation method is:
Batching be the magnesium of 5-10% by weight percentage, the calcium of the aluminium of 40-50%, 3-5%, the yttrium of 0.001-0.003%, surplus is that iron is prepared burden;
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
The invention has the beneficial effects as follows:
This kind of alloy can be used as the whole desulfating and deoxidation agent of molten steel, easy to use, directly drops in molten steel.Because proportion, the fusing point of alloy ratio simple substance magnesium and fine aluminium are large, the time stopping in molten steel during alloy deoxidation is longer, and utilization ratio is higher, and cost is also low.
Embodiment
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, it forms be the magnesium of 5-10% by weight percentage, the calcium of the aluminium of 40-50%, 3-5%, the yttrium of 0.001-0.003%, surplus is iron.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
Its preparation method is:
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Embodiment 1
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 10% magnesium, 50% aluminium, 5% calcium, 0.003% yttrium by weight percentage, surplus is iron.
Embodiment 2
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 5% magnesium, 40% aluminium, 3% calcium, 0.001% yttrium by weight percentage, surplus is iron.
Embodiment 3
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 8% magnesium, 42% aluminium, 3.5% calcium, 0.0015% yttrium by weight percentage, surplus is iron.
Claims (2)
1. a desulfating and deoxidation agent magnesia-alumina-ferroalloy preparation method, is characterized in that:
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
2. desulfating and deoxidation agent magnesia-alumina-ferroalloy preparation method according to claim 1, is characterized in that: yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310755242.7A CN103741020A (en) | 2013-12-27 | 2013-12-27 | Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310755242.7A CN103741020A (en) | 2013-12-27 | 2013-12-27 | Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent |
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| CN103741020A true CN103741020A (en) | 2014-04-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710583A (en) * | 2013-12-27 | 2014-04-09 | 姚芸 | Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof |
| CN111411193A (en) * | 2020-05-18 | 2020-07-14 | 鞍钢实业集团有限公司冶金资源再生利用分公司 | Efficient and environment-friendly KR desulfurizer and preparation method thereof |
| CN114686737A (en) * | 2022-04-09 | 2022-07-01 | 五台云海镁业有限公司 | High-quality magnesium-based master alloy and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| CN101418365A (en) * | 2008-11-13 | 2009-04-29 | 北京科技大学 | Magnesia-alumina-ferroalloy and preparation method thereof |
| CN101435005A (en) * | 2007-11-15 | 2009-05-20 | 杨军 | Low silicon aluminum-iron alloy |
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2013
- 2013-12-27 CN CN201310755242.7A patent/CN103741020A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| CN101435005A (en) * | 2007-11-15 | 2009-05-20 | 杨军 | Low silicon aluminum-iron alloy |
| CN101418365A (en) * | 2008-11-13 | 2009-04-29 | 北京科技大学 | Magnesia-alumina-ferroalloy and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710583A (en) * | 2013-12-27 | 2014-04-09 | 姚芸 | Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof |
| CN111411193A (en) * | 2020-05-18 | 2020-07-14 | 鞍钢实业集团有限公司冶金资源再生利用分公司 | Efficient and environment-friendly KR desulfurizer and preparation method thereof |
| CN111411193B (en) * | 2020-05-18 | 2022-05-10 | 鞍钢实业集团有限公司冶金资源再生利用分公司 | Efficient and environment-friendly KR desulfurizer and preparation method thereof |
| CN114686737A (en) * | 2022-04-09 | 2022-07-01 | 五台云海镁业有限公司 | High-quality magnesium-based master alloy and production method thereof |
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Application publication date: 20140423 |