CN101054615A - Silicon-calcium-ferrum alloy - Google Patents
Silicon-calcium-ferrum alloy Download PDFInfo
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- CN101054615A CN101054615A CN 200710110483 CN200710110483A CN101054615A CN 101054615 A CN101054615 A CN 101054615A CN 200710110483 CN200710110483 CN 200710110483 CN 200710110483 A CN200710110483 A CN 200710110483A CN 101054615 A CN101054615 A CN 101054615A
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Abstract
The invention provides a Si-Ca-Fe alloy, with the components of Si: 40-45%, Ca: 10-15%, Fe: 40-45% and unavoidable impurities for the rest. The alloy density in the invention is above 4g/cm3 because the Ca content is low and iron content is high. The alloy is suitable for steel liquid deoxidizing agent. Also, the alloy can exist in the steel liquid relatively longer compared with the regular Si-Ca-Fe alloy for its bigger specific gravity, which can sufficiently deoxidize the calcium of the alloy in the invention, without burning on the surface of the liquid steel.
Description
Technical field
The present invention relates to silicon-calcium-iron alloy, specifically, relate to a kind of silicon-calcium-iron alloy that is specially adapted to steel-deoxidizing.
Background technology
Silicon-calcium-alloy is used as steel making deoxidant because of its good deoxidizing capacity always, and especially when smelting the high-quality steel, this alloy almost is indispensable.Be to guarantee and improve the deoxidizing capacity of silicon-calcium-alloy, various technological standards have particularly been made strict regulation to the content of calcium to the content of the silicon in calcium-silicon alloy, calcium, but do not impose any restrictions for the content of iron wherein.Follow-up study since silicon-calcium-alloy comes out mainly concentrates on and how to produce the higher silicon-calcium of calcium contents-alloy, because generally believe that in the industry the content of calcium in silicon-calcium-alloy is high more, then its deoxidizing capacity is just strong more.But true really not so, use the high silicon-calcium-alloy of calcic might not access the ideal deoxidation effect, tracing it to its cause is, the less (2.4g/cm of the proportion of silicon-calcium that calcic is high-alloy
3).When being added on this silicon-calcium-alloy in the molten steel during deoxidation, it floats easily, and part silicon-calcium-alloy floats on the molten steel face as a result, causes wherein calcium by the oxidation of airborne oxygen institute, burning.In fact this part calcium do not play the effect of reductor.In light of this situation, the present technique field waits in expectation always and heavy novel silicon-calcium alloy occurs.
Summary of the invention
For eliminating the deficiencies in the prior art, the invention provides a kind of silicon-calcium-iron alloy, it contains: Si:40-45%, Ca:10-15%, Fe:40-45% and unavoidable impurities.
Calcium contents in silicon-calcium of the present invention-iron alloy obviously reduces than the calcium contents in existing silicon-calcium alloy, but such calcium contents has been enough to guarantee to make steel deoxidation well;
The silicon of contained 40-45% further strengthens the deoxidizing capacity of described calcium in the above-mentioned alloy;
In alloy of the present invention, iron is confirmed as necessary component.The content of iron is defined as 40-45% in order that the proportion that improves this alloy to 4g/cm
3More than, so that its unlikely too fast come-up in back in being added on molten steel, but stay for a long time in the molten steel rather than, so just can improve the utilization ratio of calcium by the oxidation of airborne oxygen institute.
Silicon-calcium of the present invention-iron alloy can be smelted with conventional ore deposit heat furnace method, but will increase the consumption of steel cuttings in the furnace charge, reduces the consumption of lime simultaneously, so just can reduce the calcium contents in this alloy, increases iron level wherein.Concrete distribution belongs to those skilled in the art's general knowledge, so repeat no more in the present invention.
The also available induction furnace production of above-mentioned alloy is promptly with getting final product with addition of an amount of steel scrap after the silicon-calcium alloy fusing of induction furnace with routine again.
Further specify the present invention below in conjunction with embodiment.
Embodiment
Embodiment 1
Main raw material(s) is: silica, steel cuttings, lime, blue carbon, its ratio of steel scrap are: 200: 35: 55: 145: 60.Smelt carrying out routine in silica, steel cuttings, lime, the hot stove in adding ore deposit, blue carbon mixing back.After tapping a blast furnace steel scrap is added hot metal ladle, obtain the following alloy of composition after the fusing: Si:42.5%, Ca:11.2%, Fe:44.1%, its proportion are 4.3g/cm
3
Embodiment 2
Must be used for the 900A steel-deoxidizing in the alloy of embodiment 1.The molten steel amount is 100 tons, and the consumption of this alloy is 80 kilograms.In deoxidation process, do not see the white smoke of calcium incendiary spark and calcium oxide on the liquid level in ladle.T[O in the steel after the deoxidation] be 18PPm.
Comparative Examples 1
Make steel-deoxidizing with the condition identical, but the composition of the deoxygenated alloy that uses is with embodiment:
Si:63%, Ca:32%, Fe:4.8%; Proportion 2.38g/cm
3
In deoxidation process, in ladle, see spark and smog that the calcium burning produces on the liquid level.Steel T[O after the deoxidation] be (25) PPm.
Claims (1)
1. silicon-calcium-ferrum alloy as steel making deoxidant is a benchmark in the weight of this alloy, and this alloy contains:
Si:40-45%, Ca:10-15%, Fe:40-45% and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710110483 CN101054615A (en) | 2007-06-07 | 2007-06-07 | Silicon-calcium-ferrum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710110483 CN101054615A (en) | 2007-06-07 | 2007-06-07 | Silicon-calcium-ferrum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101054615A true CN101054615A (en) | 2007-10-17 |
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ID=38794668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710110483 Pending CN101054615A (en) | 2007-06-07 | 2007-06-07 | Silicon-calcium-ferrum alloy |
Country Status (1)
| Country | Link |
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| CN (1) | CN101054615A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
-
2007
- 2007-06-07 CN CN 200710110483 patent/CN101054615A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
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