CN1227266A - Deoxidizing agent for converter steel-making - Google Patents
Deoxidizing agent for converter steel-making Download PDFInfo
- Publication number
- CN1227266A CN1227266A CN 99100131 CN99100131A CN1227266A CN 1227266 A CN1227266 A CN 1227266A CN 99100131 CN99100131 CN 99100131 CN 99100131 A CN99100131 A CN 99100131A CN 1227266 A CN1227266 A CN 1227266A
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- China
- Prior art keywords
- steel
- making
- deoxidizing agent
- reductor
- converter steel
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The deoxidizing agent for steel smelting in converter may be used to reduce oxygen content and inclusion in steel, eliminate harmful components, improve the mechanical property and quality, save material and raise output.It is a mixture of the components with 5-40 mm granularity in weight percentage of: Si 2-10, Ca 40-65, C18-30, P 0.003-0.01, S 0.005-0.02 and RO the rest.
Description
The invention belongs to a kind of preparation method of deoxidizing agent for converter steel-making.
Converter current steel-making has ferrosilicon, ferromanganese, silicomanganese with reductor, is weak reductor, produces SiO
2, MnS is mingled with ferrosilicon, aluminium has stronger deoxidizing capacity, but contains more AL in the steel
2O
3Not only influenced the mechanical property of steel and surface quality but also can cause water gap of steel teeming ladle to stop up, sial barium produces AL equally
2O
3Be mingled with, the silico-calcium effect better but the quiet steel of aluminium can't use, and cost an arm and a leg.
Chinese patent CN1049377 discloses a kind of deoxidising agent for manufacture of steel with converters, is made up of Ca, Si, C, and its effect is to improve steel, makes that impurity descends in the steel, but because of it contains SiC, is not suitable for to contain the lower steel grade of C, Si amount.
The objective of the invention is to improve the steel of different varieties steel, reduce cost simultaneously.Improve steel and comprise the minimizing inclusion, remove objectionable constituent, improve and improve the mechanical property of steel, reducing cost comprises the saving alloy material, reduces waste product, reduces iron and steel stock consumption, improves lumber recovery.
The present invention is achieved in that reductor is by the following raw material of granularity 5-40mm and the mixture (weight percent) of ratio: Si 2-10, and Ca 40-65, C 18-30, p 0.003-0.01, S 0.005-0.02, surplus is RO.
Drop into reductor of the present invention in the tapping process in ladle, tapping connects the conventional element such as Mn that adds again in ladle, has gone out behind the steel routinely hello aluminum steel in molten steel.
Compare with background technology, the invention has the beneficial effects as follows:
1, the present invention is applied widely, is not only applicable to contain in the higher steel of C, Si, is applicable to that also containing the lower steel grade of C, Si amount uses.
2, calcic of the present invention is higher, and processing and fabricating is simple, and price is lower, has obvious deoxidization effect.
3, use reductor of the present invention to add in the molten steel, all the other technologies are constant, and ladle oxygen molten steel decided at the higher level but not officially announced oxygen level≤30ppm makes that oxygen level obviously reduces in the steel.
4, alloy recovery is generally improved, but make the alloy consumption reduce instead of part aluminium, reduce the cost of steel.
5, use reductor of the present invention to make steel teeming ladle, connect and annotate the solution of middle water containing opening blockage problem, help the raising of output, quality.
Even lingering section slag in 6 ladles, the reductibility slag can not produce harm to the negative water of tapping next time, has improved the pollution of the residual slag of ladle in the past to molten steel.
7, molten steel there is stirring action, but exclusive segment gas and inclusion floating.
Be further described below in conjunction with embodiment.
Embodiment 1:
Be used to produce general carbon steel, highquality carbon steel, structural alloy steel, reductor are following raw material and the mixture of weight percent: the Si 9.8 of granularity 5-40mm, and Ca 45, and C 20, and p 0.006, and S 0.010, and surplus is RO.
Embodiment 2:
Be used to produce the quiet steel of aluminium, weldering bottle steel, reductor is following raw material and the mixture of weight percent: the Si 2 of a matter 5-40mm, and Ca 60, and C 28, and p 0.006, and S 0.010, and surplus is RO.
Embodiment 3:
Be used to produce medium carbon structural alloy steel, reductor is following raw material and the mixture of weight percent: the Si 3.5 of a matter 5-40mm, and Ca 50, and C 20, and p 0.008, and S 0.015, and surplus is RO.
Embodiment 4:
Be used to produce low medium carbon structural alloy steel, weathering steel, reductor are following raw material and the mixture of weight percent: the Si 4 of a matter 5-40mm, and Ca 55, and C 25, and p 0.007, and S 0.014, and surplus is RO.
Claims (1)
1, a kind of deoxidizing agent for converter steel-making is characterized in that it is the following raw material of granularity 5-40mm and the mixture (weight percent) of ratio: Si 2-10, and Ca 40-65, C 18-30, p 0.003-0.01, S 0.005-0.02, surplus is RO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100131 CN1227266A (en) | 1999-01-15 | 1999-01-15 | Deoxidizing agent for converter steel-making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100131 CN1227266A (en) | 1999-01-15 | 1999-01-15 | Deoxidizing agent for converter steel-making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1227266A true CN1227266A (en) | 1999-09-01 |
Family
ID=5269812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100131 Pending CN1227266A (en) | 1999-01-15 | 1999-01-15 | Deoxidizing agent for converter steel-making |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1227266A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001073139A3 (en) * | 2000-03-27 | 2002-05-23 | Newland Bart G | Compositions and two-stage methods for the deoxidation of molten steel |
-
1999
- 1999-01-15 CN CN 99100131 patent/CN1227266A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001073139A3 (en) * | 2000-03-27 | 2002-05-23 | Newland Bart G | Compositions and two-stage methods for the deoxidation of molten steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |