CN1858267A - Molten steel composite refining agent - Google Patents
Molten steel composite refining agent Download PDFInfo
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- CN1858267A CN1858267A CN 200610054339 CN200610054339A CN1858267A CN 1858267 A CN1858267 A CN 1858267A CN 200610054339 CN200610054339 CN 200610054339 CN 200610054339 A CN200610054339 A CN 200610054339A CN 1858267 A CN1858267 A CN 1858267A
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- refining agent
- molten steel
- deoxidizing
- alloy
- proportioning
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Abstract
The composite molten steel refining agent consists of deoxidizing alloy and refining agent base material in the weight ratio of 0.75-3 to 1. The deoxidizing alloy consists of Ca 8-18%, Si 35-45%, Ba 7- 17%, Al 10-25% and C 15-35%; and the refining agent base material consists of CaO 50-65%, Al2O3 30-45%, SiO 6-22% and MgO 5-10%. The composite molten steel refining agent of the present invention may be used as the pre-deoxidizing agent or cinder pushing modifier, can avoid the formation of SiO2, AL2O3 and other high smelting point solid deoxidizing products, and is favorable to the formation of low smelting point composite compounds. The present invention has high deoxidizing effect, low deoxidizing cost, and no fluorine content resulting in environment friendship.
Description
Technical field
The present invention relates to the auxiliary interpolation material that uses in a kind of metallurgy industry steelmaking process, the molten steel composite refining agent that uses as pre-deoxidant or top slag modifier that especially when tapping, in ladle, adds.
Background technology
Along with being extensive use of of raising, especially high-performance that steel quality is required, high quality steel, the subsidiary material in the steelmaking process are had higher requirement.This invention molten steel composite refining agent is the novel metallurgical subsidiary material that integrate refining function such as molten steel, slag deoxidation, absorption are mingled with.When tapping, in ladle, add, can play the alloy desoxydatoin.On the ladle top of the slag, add, can effectively change the quality problems that the slag oxidation height brings under the converter slag deoxidation, upgrading under converter, the electric furnace.
This invention is compared with traditional reductor, top slag modifier and application art thereof, because deoxidation products Al
2O
3, SiO
2With the base-material in the refining agent, formed low-melting compound, reduced the activity of deoxidation products, help effective utilization of deoxidant element.Under a spot of alloying element condition, can obtain high efficiency deoxidation effect, reduced the deoxidation cost.Refining agent is owing to the existence of refining base-material, and polymerizing power is strong, to sulfide inclusion, nitride inclusion, oxide inclusion, particularly SiO
2, Al
2O
3Be mingled with and have strong adsorptive power function.This invention does not contain free CaO, calcium carbide CaC
2Etc. easy moisture absorption material, storage time is long, and no flue dust flies upward in the use.Not fluorine-containing, help environment protection.The refining agent These characteristics is that traditional SiAlBa, SiCaBa composite alloy reductor, other refining agent is not available.Being called " high-performance refining agent ", number of patent application as name is 02123885.5 the disclosed technical scheme of Chinese invention patent application documents, is made up of calcium carbide powder, magnesium powder, aluminium powder and ferrosilicon powder; It is 200410083014.0 the disclosed technical scheme of Chinese invention patent application documents that another name is called " composite refiner for metallurgy ", number of patent application, contains silicocalcium, Si-Ba alloy, calcium carbide etc., does not possess above-mentioned advantage.In addition, some refining agent includes diamond stone CaF
2Composition is unfavorable for environment protection.The price comparison of some refining agent own is expensive, can not effectively reduce smelting cost.
Summary of the invention
The present invention is directed to the deficiency of existing refining agent, a kind of composite refiner of being made up of deoxygenated alloy and scouring agent base-material is provided.
Technical scheme of the present invention: a kind of molten steel composite refining agent is characterized in that: be made up of deoxygenated alloy and refining agent base-material, deoxygenated alloy is made up of Ca, Si, Ba, Al, C; The proportioning of deoxygenated alloy is as follows: Ca8～18%, Si35～45%, Ba7～17%, Al10～25%, C15～35%; The refining agent base-material is by CaO, AL
2O
3, SiO
2, MgO forms, the proportioning of refining agent base-material is as follows: CaO50～65%, Al
2O
330～45%, SiO
22～6%, MgO5～10%.The ratio range of deoxygenated alloy and refining agent base-material is as follows, deoxygenated alloy: the refining agent base-material is 0.75～3: 1.
Molten steel composite refining agent of the present invention with respect to prior art, has following characteristics:
1, the reductor of being made up of multiple alloying element in the composite refiner helps preventing high-melting-point pure substance SiO
2, AL
2O
3Etc. the formation of solid phase deoxidation products, make it form low-melting complex chemical compound; And the fusing point of the scouring agent base-material in the composite refiner is lower, and its fusing point is 1370-1400 ℃, and low-melting scouring agent is fused into liquid state very soon when contacting with high-temperature molten steel, and liquid scouring agent density is light, in floating-upward process with deoxidation products SiO
2, AL
2O
3During gathering, will generate low-melting C
17A
7(1450 ℃ of fusing points) and low melting point eutectic thing C
2SC
12A
7-CA (1335 ℃ of fusing points) has strengthened the come-up of deoxidation products and has got rid of, and has realized the purpose of purification of molten steel.
Owing to low-melting compound of deoxidation products SiO2, AL2O3 etc. and scouring agent formation, reduced the activity of deoxidation products, help effective utilization of deoxidant element.So, under a spot of alloying element condition, can obtain high efficiency deoxidation effect, reduced the deoxidation cost.
The CO gas that carbon in the scouring agent produces in deoxidation process becomes the stirring gas in molten bath, has strengthened tapping process deoxidation dynamic conditions, and the polymerization that helps deoxidation products is got rid of.This composite refiner has efficient deoxidation, purification is mingled with function.
2, composite refiner is owing to there is the low melting point scouring agent of a certain amount of strong reductor and high basicity, after finishing, in the slag of top, add fashionable in tapping, can be effectively to the ladle top slag upgrading, reduce its oxidisability, and the top slag behind the upgrading is keeping that good thawing performance is arranged under the higher alkalisation, come-ups such as deoxidation products is mingled with have very strong adsorptive power.Ladle slag behind the upgrading belongs to the CaO-AL of low (FeO)
2O
3-SiO
2The ternary slag system, this basicity of slag height, fusing point are low, a little less than the oxidisability.
3, refining agent belongs to reduction, basic slag system, slag not only has low oxidisability after by upgrading, and kept higher alkalisation, and not only avoided the oxidisability top slag quality problems that direct oxidation brings to molten steel, also prevented SiO under the low basicity simultaneously effectively
2To the indirect oxidation of molten steel, help the raising of acid-soluble aluminum content in the steel; Guarantee that simultaneously the top slag has certain alkalescence useful to preventing rephosphorization.
4, applied widely: except Ultra-low carbon, low-silicon steel, can be used for all straight carbon steels and, low alloy steel.
5, the used alkaline base-material of composite refiner does not contain CaO, CaC
2Etc. easy moisture absorption material, storage time is long; Not fluorine-containing in the proportioning (mainly is CaF
2), help environment protection.
Embodiment
Molten steel composite refining agent of the present invention is made up of multiple deoxygenated alloy and refining agent base-material, and deoxygenated alloy is made up of Ca, Si, Ba, Al, C; The proportioning of deoxygenated alloy is as follows: Ca8～18%, Si35～45%, Ba7～17%, Al10～25%, C15～35%; The refining agent base-material is made up of following material, CaO, AL
2O
3, SiO
2, MgO, the proportioning of each component is as follows: CaO50～65%, Al
2O
330～45%, SiO
22～6%, MgO5～10%.The ratio range of deoxygenated alloy and refining agent base-material is as follows, deoxygenated alloy: the refining agent base-material is 0.75～3: 1, and the shared weight ratio of deoxygenated alloy is generally 40-80%.
The production technique of molten steel composite refining agent of the present invention:
Deoxygenated alloy: broken, granularity 1～5mm.
Refining agent base-material: fritting, fragmentation.Granularity 1～5mm.
Finished product: deoxygenated alloy and refining agent base-material are according to aforementioned proportion mixing and stirring, high pressure briquetting, granularity 5～15mm, waterproof packing.In finished product, the shared weight ratio of deoxygenated alloy is generally 40-80%.Components such as the Ca in the deoxygenated alloy, Si, Ba, Al, C, purity is higher, can satisfy requirement of the present invention.
It optimizes proportioning ():
The proportioning of deoxygenated alloy is as follows: Ca11%, Si38%, Ba10%, Al16%, C25%;
The proportioning of refining agent base-material is as follows: CaO53%, Al
2O
338%, SiO
24%, MgO5%.
Deoxygenated alloy: refining agent base-material=1.5: 1
It optimizes proportioning (two):
The proportioning of deoxidant element is as follows: Ca18%, Si35%, Ba15%, Al10%, C22%;
The proportioning of refining agent base-material is as follows: CaO60%, Al
2O
330%, SiO
22%, MgO8%.
Deoxygenated alloy: refining agent base-material=3: 1
It optimizes proportioning (three):
The proportioning of deoxidant element is as follows: Ca8%, Si45%, Ba7%, Al25%, C15%;
The proportioning of refining agent base-material is as follows: CaO50%, Al
2O
334%, SiO
26%, MgO10%.
Deoxygenated alloy: refining agent base-material=0.8: 1
Molten steel composite refining agent of the present invention can be used as pre-deoxidant or top slag modifier and uses; Should be in converter, electric furnace steel tapping process as pre-deoxidant, utilize its mix towards the time good dynamic conditions add in the ladle, replace the equivalent alloy, as Si-Al-Ba etc., molten steel is carried out pre-deoxidation, add-on: 1.5Kg/ ton steel.Should after having gone out steel, add in the ladle slag to the slag upgrading add-on 0.5-0.75Kg/ ton steel as top slag modifier.
Show that through experimental result adopt the deoxidation of 1.5Kg/ ton steel composite refiner, 0.6Kg/ ton steel composite refiner upgrading slag can be realized liquid steel pre-deoxidizing, before the argon [O]
DLess than 70PPm, behind the argon [O]
DLess than 20PPm.((FeO)+(MnO) is less than 5% target call for steel slag modification.Comprehensive deoxidation, upgrading effect are better than single with alloy deoxygenation conditions such as Si-Al-Ba.
Composite refiner deoxidation of the present invention, upgrading effect stability.No flue dust flies upward in the use, and bag is interior, top of the slag reacting balance, and the slag attitude is loose, and fusing is good, the not conglomeration of ladle liquid level.
Because deoxidation, upgrading are respond well, yield of alloy such as silicon, manganese improve, and comprehensive cost is lower than the alloy reductor.
Composite refiner of the present invention be utilized alloying element effectively be used to realize efficient deoxidation effect.Under a spot of alloying element condition, can obtain high efficiency deoxidation effect, reduced the deoxidation cost.Therefore simultaneously, be furnished with the refining agent that SiO2, AL2O3 deoxidation products is had strong adsorptive power in the composite refiner, be used for that inclusion is had strict demand, it is more favourable particularly AL2O3 to be mingled with deoxidation, the upgrading of high-carbon hard wire steel etc. of requirement.
Claims (3)
1, a kind of molten steel composite refining agent is characterized in that: be made up of deoxygenated alloy and refining agent base-material, deoxygenated alloy is made up of Ca, Si, Ba, Al, C; The proportioning of deoxygenated alloy is as follows: Ca8～18%, Si35～45%, Ba7～17%, Al10～25%, C15～35%;
The refining agent base-material is by CaO, AL
2O
3, SiO
2, MgO forms, the proportioning of refining agent base-material is as follows: CaO50～65%, Al
2O
330～45%, SiO
22～6%, MgO5～10%;
Deoxygenated alloy: refining agent base-material=0.75～3: 1.
2, molten steel composite refining agent according to claim 1 is characterized in that: the proportioning of described deoxygenated alloy is as follows: Ca11%, Si38%, Ba10%, Al16%, C25%; The proportioning of described refining agent base-material is as follows: CaO53%, Al
2O
338%, SiO
24%, MgO5%; Deoxygenated alloy: refining agent base-material=1.5: 1.
3, molten steel composite refining agent according to claim 1 is characterized in that: the proportioning of described deoxygenated alloy is as follows: Ca18%, Si35%, Ba15%, Al10%, C22%; The proportioning of described refining agent base-material is as follows: CaO60%, Al
2O
330%, SiO
22%, MgO8%; Deoxygenated alloy: refining agent base-material=3: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100543395A CN100371464C (en) | 2006-06-02 | 2006-06-02 | Molten steel composite refining agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100543395A CN100371464C (en) | 2006-06-02 | 2006-06-02 | Molten steel composite refining agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1858267A true CN1858267A (en) | 2006-11-08 |
| CN100371464C CN100371464C (en) | 2008-02-27 |
Family
ID=37297224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100543395A Expired - Fee Related CN100371464C (en) | 2006-06-02 | 2006-06-02 | Molten steel composite refining agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371464C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011059A (en) * | 2010-12-29 | 2011-04-13 | 重庆大学 | Smelting technological process of low-silicon low-manganese ultrapure rotor steel |
| CN102146518A (en) * | 2011-04-02 | 2011-08-10 | 钢铁研究总院 | Refining agent for atmosphere protected electro-slag re-melting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2118209B (en) * | 1982-02-12 | 1986-06-04 | Showa Denko Kk | Refining agent of molten metal and methods for producing the same |
| JPH0696734B2 (en) * | 1990-04-09 | 1994-11-30 | 住友金属工業株式会社 | Method for producing clean steel with excellent resistance to hydrogen-induced cracking |
| JPH0633132A (en) * | 1992-07-17 | 1994-02-08 | Sumitomo Metal Ind Ltd | Method for deoxidizing molten steel |
| CN1179055C (en) * | 2000-04-29 | 2004-12-08 | 幸超 | Slag modifier for refining molten steel |
| CN1363692A (en) * | 2001-01-10 | 2002-08-14 | 张海军 | Composite Si-Ca-Ba-Mg deoxidizing agent and its preparing process |
-
2006
- 2006-06-02 CN CNB2006100543395A patent/CN100371464C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011059A (en) * | 2010-12-29 | 2011-04-13 | 重庆大学 | Smelting technological process of low-silicon low-manganese ultrapure rotor steel |
| CN102011059B (en) * | 2010-12-29 | 2012-04-18 | 重庆大学 | Smelting technological process of low-silicon low-manganese ultrapure rotor steel |
| CN102146518A (en) * | 2011-04-02 | 2011-08-10 | 钢铁研究总院 | Refining agent for atmosphere protected electro-slag re-melting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100371464C (en) | 2008-02-27 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20080227 Termination date: 20100602 |