CN101906509A - Steel-making aluminum-calcium-iron deoxidizer and preparation method - Google Patents
Steel-making aluminum-calcium-iron deoxidizer and preparation method Download PDFInfo
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- CN101906509A CN101906509A CN 201010254239 CN201010254239A CN101906509A CN 101906509 A CN101906509 A CN 101906509A CN 201010254239 CN201010254239 CN 201010254239 CN 201010254239 A CN201010254239 A CN 201010254239A CN 101906509 A CN101906509 A CN 101906509A
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- calcium
- powder
- deoxidizer
- aluminum
- iron
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Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to a steel-making aluminum-calcium-iron deoxidizer. The deoxidizer is a ball-shaped composition comprising powder, such as aluminum metal powder, calcium metal powder, iron metal powder and the like. Due to the components, the shapes and sizes of the components, and the shape of the composition formed after balling, the deoxidizer has the characteristics that: the aluminum metal powder, the calcium metal powder and the iron metal powder are pressed into balls, so a preparation method is simple and convenient; the finished products have strong strength, and are directly fed into a head bunker of a steel mill for use; the deoxidizer has high rate of finished products, high reducing capacity, high molten steel deoxidizing capacity, and molten steel total oxygen content lower than that obtained by like deoxidizers; deoxidizing products grow up in a mutual coalescence way, and fast float upwards; the impurity content of the steel is reduced, and simultaneously impurities can be denatured; and the molten steel has high flowability in casting.
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, feeding CaSi cored-wire or calcium line in continuous casting of molten steel forward direction ladle make Al in the molten steel in recent years
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 combined composition 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 58% – 80%, shared weight percent 15% – 30% 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 | 58 |
| Metallic calcium powder | 0~2 | 30 |
| Metal iron powder | 0~2 | 12 |
With raw material by said components and granularity compacting balling-up after, balling ratio is greater than 98%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 100%, smooth in appearance, highly polished.
(table 2)
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~4 | 58 |
| Metallic calcium powder | 0~4 | 30 |
| Metal iron powder | 0~4 | 12 |
With raw material by said components and granularity compacting balling-up after, balling ratio is greater than 96%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 98%, smooth in appearance, highly polished.
(table 3)
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 58 |
| Metallic calcium powder | 0~6 | 30 |
| Metal iron powder | 0~6 | 12 |
With raw material by said components and granularity compacting balling-up after, balling ratio is greater than 90%, 2m is high freely drop down onto the cement flooring greater than 10mm account for 96%, outward appearance is brighter and cleaner.
After said components compacting balling-up, in the RH refining process, use when smelting IF steel in certain steel mill, press the adding of 0.5kg/t molten steel after, the gained result is as follows:
Add that the molten steel oxygen level is 38ppm after the reductor deoxidation of the present invention.Compare with former reductor, the molten steel oxygen level has reduced 8ppm, and site environment is pollution-free.Fluidity molten steel is good, and continous casting sprue does not have dross.
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 | 65 |
| Metallic calcium powder | 0~6 | 15 |
| Metal iron powder | 0~6 | 20 |
After said components compacting balling-up, in the RH refining process, use when smelting IF steel in certain steel mill, press the adding of 0.5kg/t molten steel after, the gained result is as follows:
Add that the molten steel oxygen level is 35ppm after the reductor deoxidation of the present invention.Compare with former reductor, the molten steel oxygen level has reduced 11ppm, and site environment is pollution-free.Fluidity molten steel is good, and continous casting sprue does not have dross.
Embodiment 3:
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 70 |
| Metallic calcium powder | 0~6 | 18 |
| Metal iron powder | 0~6 | 12 |
After said components compacting balling-up, in the RH refining process, use when smelting IF steel in certain steel mill, press the adding of 0.5kg/t molten steel after, the gained result is as follows:
Add that the molten steel oxygen level is 33ppm after the reductor deoxidation of the present invention.Compare with former reductor, the molten steel oxygen level has reduced 13ppm, and site environment is pollution-free.Fluidity molten steel is good, and continous casting sprue does not have dross.
Embodiment 4:
| Feed composition | Granularity (mm) | %(weight) |
| Metallic aluminium powder | 0~6 | 80 |
| Metallic calcium powder | 0~6 | 10 |
| Metal iron powder | 0~6 | 10 |
After said components compacting balling-up, in the RH refining process, use when smelting IF steel in certain steel mill, press the adding of 0.5kg/t molten steel after, the gained result is as follows:
Add that the molten steel oxygen level is 29ppm after the reductor deoxidation of the present invention.Compare with former reductor, the molten steel oxygen level has reduced 17ppm, and site environment is pollution-free.Fluidity molten steel is good, and continous casting sprue does not have dross.
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 58% – 80%, shared weight percent 15% – 30% 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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| CN201010254239.3A CN101906509B (en) | 2010-08-16 | 2010-08-16 | A kind of aluminum-calcium-iron deoxidizer used for steel making and preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981332A (en) * | 2014-04-08 | 2014-08-13 | 河南鹏钰集团有限公司 | Aluminum-barium wire and production process thereof |
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 |
-
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- 2010-08-16 CN CN201010254239.3A patent/CN101906509B/en active Active
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 |
|---|---|---|---|---|
| CN103981332A (en) * | 2014-04-08 | 2014-08-13 | 河南鹏钰集团有限公司 | Aluminum-barium wire and production process thereof |
| CN103981332B (en) * | 2014-04-08 | 2016-04-13 | 河南鹏钰集团有限公司 | A kind of aluminium barium line and production technique thereof |
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| CN101906509B (en) | 2016-04-13 |
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