CN101906510A - Steelmaking aluminum calcium ferrum deoxidizer and preparation method thereof - Google Patents
Steelmaking aluminum calcium ferrum deoxidizer and preparation method thereof Download PDFInfo
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- CN101906510A CN101906510A CN 201010254240 CN201010254240A CN101906510A CN 101906510 A CN101906510 A CN 101906510A CN 201010254240 CN201010254240 CN 201010254240 CN 201010254240 A CN201010254240 A CN 201010254240A CN 101906510 A CN101906510 A CN 101906510A
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Abstract
The invention belongs to the technical field and particularly relates to steelmaking aluminum calcium ferrum deoxidizer. The deoxidizer is a spherical composition formed by combining metal aluminum powder, metal calcium powder, metal ferrum powder, and the like. Because of the components, shapes and pelletized shape of the composition, the deoxidizer has the following characteristics: the metal aluminum powder, the metal calcium powder and the metal ferrum powder are pressed into balls with simple preparation method; the finished product has high intensity, can be used directly in a high-order bunker in a steel plant, has large weight ratio with strong reduction ability, has strong steel liquid deoxidizing capacity and is low in the total oxygen content of steel liquid; the deoxidization outputs are accumulated and grown together and can rise rapidly; the impurity in steel is reduced and can be denatured; and the mobility of steel liquid during casting is good.
Description
Technical field
The invention belongs to metallurgical technology field, relate to and utilize metallic aluminium powder, metallic calcium powder and metal iron powder compacting balling-up.In converter, electric furnace steel tapping process or add in the refining processs such as RH, LF, molten steel is carried out deoxidation.
Background technology
Metallic aluminium generally uses in converter or electrosmelting tapping process as a kind of deep deoxidation agent, and its good deoxy performance has obtained everybody approval, and present used aluminium deoxidizer has metal aluminium ingot, ferro-aluminum etc., but the Al that produces after its deoxidation
2O
3Solid inclusion can be present in the molten steel in a large number, is difficult for come-up, if in smelting technology after this not with its removal, nozzle clogging in the time of not only can causing continuous casting, and can reduce the mechanical property and the machinability of Finished Steel.In order to eliminate Al in the molten steel
2O
3The defective that inclusion causes feeds CaSi cored-wire or calcium line in recent years in ladle before continuous casting of molten steel, make Al in the molten steel
2O
3Solid inclusion becomes 12CaO7Al under the effect of calcium metal
2O
3Float on the liquid phase in the slag of top, or make Al
2O
3Irregular inclusion modification is a nodule.But the calcium line utilization ratio is low and cost is high, and the CaSi alloy wire is same with high costs and can cause molten steel to increase Si.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of aluminum-calcium-iron deoxidizer used for steel making is provided, this reductor is the composition of the ball shape that constituted by pulvis such as metallic aluminium powder, metallic calcium powder and metal iron powders, the moiety of said composition and shape size thereof, and shape after the balling-up, make this reductor in use thoroughly avoid the deficiencies in the prior art.
The object of the invention realizes being finished by following technical scheme:
A kind of aluminum-calcium-iron deoxidizer used for steel making, it is characterized in that described aluminum calcium ferrum deoxidizer is made up of metallic aluminium powder, metallic calcium powder and metal iron powder, wherein the shared weight percent of metallic aluminium powder is 38% – 62%, shared weight percent 6% – 20% of metallic calcium powder, and all the other are metal iron powder.
Can contain additive in the described aluminum calcium ferrum deoxidizer, this additive accounts for the 5%-15% of described aluminum calcium ferrum deoxidizer gross weight, and described additive is the combination of a kind of in barium powder, silica flour, rare earth material, the magnesium powder or at least two kinds.
The granularity of described metallic aluminium powder, metallic calcium powder, metal iron powder is not more than 6mm.
The described weight percent that also can contain is no more than 3% water-insoluble binding agent, and this binding agent is the combination of a kind of in resene, pitch, paraffin, the rosin or at least two kinds.
The shape of described aluminum calcium ferrum deoxidizer is the spherule after the compression moulding.
A kind of preparation method of aluminum-calcium-iron deoxidizer used for steel making is characterized in that, the metallic aluminium powder, metallic calcium powder and the metal iron powder that a certain amount of granularity are not more than 6mm mix, and behind abundant stirring and evenly mixing, is pressed into spherule.
Advantage of the present invention is: metallic aluminium powder, metallic calcium powder and metal iron powder compacting balling-up, and the preparation method is easy; The product intensity height directly enters steel mill's high hopper and uses; Finished product possesses strong reducing power than great, and is strong to the deoxidation of molten steel ability, compares with similar reductor, and the molten steel total oxygen content is low; Deoxidation products is built up mutually and is grown up, and come-up is fast; Inclusion content of steel reduces, and can make inclusion modification simultaneously; Good fluidity during molten steel casting.
Embodiment
By the following examples feature of the present invention and other correlated characteristic are described in further detail, so that technician's of the same trade understanding:
Embodiment 1:
(table 1)
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~2 | 38 |
| Metallic calcium powder | 0~2 | 6 |
| Metal iron powder | 0~2 | 56 |
With raw material by said components and granularity compacting balling-up after, balling ratio reaches 100%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 99%, smooth in appearance, highly polished.
(table 2)
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~4 | 38 |
| Metallic calcium powder | 0~4 | 6 |
| Metal iron powder | 0~4 | 56 |
With raw material by said components and granularity compacting balling-up after, balling ratio reaches 98%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 96%, smooth in appearance, highly polished.
(table 3)
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 38 |
| Metallic calcium powder | 0~6 | 6 |
| Metal iron powder | 0~6 | 56 |
With raw material by said components and granularity compacting balling-up after, balling ratio is greater than 95%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 95%, outward appearance is brighter and cleaner.
After said components compacting balling-up, deoxidation when being used for the AOD tapping, deoxidation is used when smelting ferritic stainless steel in certain steel mill, press the adding of 2.2kg/t molten steel after, the gained result is as follows:
Add after the reductor deoxidation of the present invention that oxygen level is 69ppm in the molten steel, compare with former reductor, oxygen level has reduced 11ppm in the molten steel.Site environment is pollution-free.
In the test of above-mentioned adding reductor, the reductor that we have selected the pulvis of above-mentioned three kinds of size ranges to suppress respectively carries out above-mentioned test, and the result shows, in deoxidation process, product of the present invention after the compacting balling-up, wherein the globule size of component is not seen notable difference to deoxidation effect.
Embodiment 2:
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 45 |
| Metallic calcium powder | 0~6 | 15 |
| Metal iron powder | 0~6 | 40 |
After said components compacting balling-up, deoxidation when being used for the AOD tapping, deoxidation is used when smelting ferritic stainless steel in certain steel mill, press the adding of 2.2kg/t molten steel after, the gained result is as follows:
Add after the reductor deoxidation of the present invention that oxygen level is 65ppm in the molten steel, compare with former reductor, oxygen level has reduced 15ppm in the molten steel.Site environment is pollution-free.
Embodiment 3:
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 50 |
| Metallic calcium powder | 0~6 | 15 |
| Metal iron powder | 0~6 | 35 |
After said components compacting balling-up, deoxidation when being used for the AOD tapping, deoxidation is used when smelting ferritic stainless steel in certain steel mill, press the adding of 2.2kg/t molten steel after, the gained result is as follows:
Add after the reductor deoxidation of the present invention that oxygen level is 64ppm in the molten steel, compare with former reductor, oxygen level has reduced 16ppm in the molten steel.Site environment is pollution-free.
Embodiment 4:
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 62 |
| Metallic calcium powder | 0~6 | 20 |
| Metal iron powder | 0~6 | 18 |
After said components compacting balling-up, deoxidation when being used for the AOD tapping, deoxidation is used when smelting ferritic stainless steel in certain steel mill, press the adding of 2.2kg/t molten steel after, the gained result is as follows:
Add after the reductor deoxidation of the present invention that oxygen level is 60ppm in the molten steel, compare with former reductor, oxygen level has reduced 20ppm in the molten steel.Site environment is pollution-free.
The present invention uses in the process of ladle in converter or electric furnace steel tapping, directly joins in the ladle to mix towards deoxidation with molten steel.
The present invention almost is applicable to all aluminium killed steels.Also can add the steel grade that combinations a kind of or at least two kinds in barium powder, silica flour, rare earth material, the magnesium powder are used to have particular requirement in the present invention, as rare earth steel etc.Also can adopt binding agents such as adding non-water-soluble resin class, pitch, paraffin, rosin in the present invention compacting balling-up (to reduce production costs) to be used for, as straight carbon steel etc. to the less demanding steel grade of molten steel purity.
Claims (6)
1. aluminum-calcium-iron deoxidizer used for steel making, it is characterized in that described aluminum calcium ferrum deoxidizer is made up of metallic aluminium powder, metallic calcium powder and metal iron powder, wherein the shared weight percent of metallic aluminium powder is 38% – 62%, shared weight percent 6% – 20% of metallic calcium powder, and all the other are metal iron powder.
2. a kind of aluminum-calcium-iron deoxidizer used for steel making according to claim 1, it is characterized in that to contain additive in the described aluminum calcium ferrum deoxidizer, this additive accounts for the 5%-15% of described aluminum calcium ferrum deoxidizer gross weight, and described additive is the combination of a kind of in barium powder, silica flour, rare earth material, the magnesium powder or at least two kinds.
3. a kind of aluminum-calcium-iron deoxidizer used for steel making according to claim 1 is characterized in that the granularity of described metallic aluminium powder, metallic calcium powder, metal iron powder is not more than 6mm.
4. a kind of aluminum-calcium-iron deoxidizer used for steel making according to claim 1, it is characterized in that also can containing in the described aluminum calcium ferrum deoxidizer weight percent and be no more than 3% water-insoluble binding agent, this binding agent is the combination of a kind of in resene, pitch, paraffin, the rosin or at least two kinds.
5. a kind of aluminum-calcium-iron deoxidizer used for steel making according to claim 1, the shape that it is characterized in that described aluminum calcium ferrum deoxidizer is the spherule after the compression moulding.
6. the preparation method of an aluminum-calcium-iron deoxidizer used for steel making is characterized in that, the metallic aluminium powder, metallic calcium powder and the metal iron powder that a certain amount of granularity are not more than 6mm mix, and behind abundant stirring and evenly mixing, is pressed into spherule.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010254240 CN101906510A (en) | 2010-08-16 | 2010-08-16 | Steelmaking aluminum calcium ferrum deoxidizer and preparation method thereof |
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| CN 201010254240 CN101906510A (en) | 2010-08-16 | 2010-08-16 | Steelmaking aluminum calcium ferrum deoxidizer and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851444A (en) * | 2011-06-28 | 2013-01-02 | 宝山钢铁股份有限公司 | Aluminum calcium composite deoxidizer |
| CN109022681A (en) * | 2018-07-20 | 2018-12-18 | 首钢集团有限公司 | A method of being handled by calcium alfer reduces Submerged Nozzle Clogging Course |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260453A (en) * | 2008-01-22 | 2008-09-10 | 谢华 | Calcium aluminum pressing block used for steel-smelting desoxidant and preparation method thereof |
| CN101696464A (en) * | 2009-10-16 | 2010-04-21 | 谢廷声 | Calcium iron pressing block for liquid steel refining and preparation method thereof |
-
2010
- 2010-08-16 CN CN 201010254240 patent/CN101906510A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260453A (en) * | 2008-01-22 | 2008-09-10 | 谢华 | Calcium aluminum pressing block used for steel-smelting desoxidant and preparation method thereof |
| CN101696464A (en) * | 2009-10-16 | 2010-04-21 | 谢廷声 | Calcium iron pressing block for liquid steel refining and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851444A (en) * | 2011-06-28 | 2013-01-02 | 宝山钢铁股份有限公司 | Aluminum calcium composite deoxidizer |
| CN109022681A (en) * | 2018-07-20 | 2018-12-18 | 首钢集团有限公司 | A method of being handled by calcium alfer reduces Submerged Nozzle Clogging Course |
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Address after: Baoshan District Shidongkou 200942 Shanghai Road No. 1 Applicant after: Shanghai Shengbao Metallurgical Technology Co., Ltd. Address before: Baoshan District Shidongkou 200942 Shanghai Road No. 1 Applicant before: Shanghai Shengbao Iron & Steel Metallurgical Furance Charge Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI SHENGBAO IRON + STEEL METALLURGICAL FURANCE CHARGE CO. LTD. TO: SHANGHAI SHENGBAO METALLURGICAL TECHNOLOGY CO., LTD. |
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Application publication date: 20101208 |