CN1024928C - Composite deoxidiser of Al-Mn-Fe - Google Patents
Composite deoxidiser of Al-Mn-Fe Download PDFInfo
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- CN1024928C CN1024928C CN 92107299 CN92107299A CN1024928C CN 1024928 C CN1024928 C CN 1024928C CN 92107299 CN92107299 CN 92107299 CN 92107299 A CN92107299 A CN 92107299A CN 1024928 C CN1024928 C CN 1024928C
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- steel
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- deoxidizing
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Abstract
The present invention discloses a composite Al-Mn-Fe deoxidizing agent used for the final deoxidization of the molten effervescing steel. The composite Al-Mn-Fe deoxidizing agent is prepared from the components by the following weight percentage: 20 to 26 of Al, 30 to 35 of Mn, 38 to 48 of Fe and balance of other impurities. Compared with pure Al deoxidizing agents, the composite Al-Mn-Fe deoxidizing agent has the advantages of strong deoxidizing capacity, low cost, good use economic benefit, etc., and a large quantity of Al resources can be saved.
Description
The invention belongs to the master alloy category of iron or steel, particularly rimming steel molten steel final deoxygenation alloy technology.
At present, the output of domestic rimming steel shared share in the ultimate production of steel is bigger, and the final deoxygenation of rimming steel molten steel generally adopts the fine aluminium deoxidization technique.Really, aluminium is a kind of strong reductor, but after aluminum strip added molten steel, oxidation was fused on the top layer at once, produces the intensive exothermic phenomenon, and makes the aluminum strip in the fusion coat the aluminium sesquioxide (Al of last layer fusing point up to 2050 ℃ immediately
2O
3), because the mixture viscosity of this metal oxide is very big, seriously hindered the continuation fusion (although the aluminium in its duricrust melts) of aluminum strip, further increased original density with regard to less (2.7g/cm
2) the buoyancy of aluminum strip, thereby influenced its deoxidizing capacity, increased the consumption of aluminium, improved the cost of rimming steel, be unfavorable for improving the economic benefit of steel-making enterprise.So people carry out the research of composite deoxidant, but according to the retrieval, at home, still find no production application and relevant report thereof to the present; Abroad, the Soviet Union discloses two relevant therewith patents, and the title of first patent is " master alloy ", and application number is SU543683.This patent is to be the ferrous alloy of main component with aluminium, silicon.Everybody is familiar with, although this AL-Si-Fe alloy it also be a kind of composite deoxidant, it is applicable to killed steel.The title of second patent is " steel-deoxidizing and an interfused alloy ", and application number is SU418549.The aluminium that this patent provides, manganese content are all very high, and for example the upper content limit of manganese reaches 77%, are limited to 40% under it, also contain more rare earth metal, and its upper limit is up to 10%.Everybody is familiar with, and the deoxidizing capacity of manganese is very weak, and it is the deoxidizing capacity of reinforced aluminum when deoxidation just.Because aluminium, the high-content of manganese and the adding of rare earth metal, to exist preparation technology more tired for this patent obviously, and price is than problems such as height.It is applicable to the fusion of special steel deoxidation and steel, and its main application is a preparation electrode flux (coating).
The object of the present invention is to provide a kind of deoxidizing capacity stronger, price is lower, uses the good in economic efficiency Al-Mn-Fe composite deoxidizer that is exclusively used in rimming steel molten steel final deoxygenation.
It includes aluminium, manganese, iron and other impurity the present invention, and said impurity comprises carbon, silicon, phosphorus, sulphur, copper etc., and it is (%) that its weight percent is formed:
Aluminium 20～26,
Manganese 30～35,
Iron 38～48,
The impurity surplus.
The content of the said impurity of the present invention in the gross weight percentage composition is (%):
Carbon is not more than 4,
Silicon is not more than 2,
Phosphorus is not more than 0.3,
Sulphur is not more than 0.05,
Copper is not more than 0.50.
A kind of typical weight percentage composition of the present invention is:
Aluminium 21.00,
Manganese 34.90,
Carbon 0.50,
Silicon 0.60,
Phosphorus 0.09,
Sulphur 0.013,
Copper 0.066,
Iron surplus.
The technological process of production of the present invention is as follows:
(1) casting → (6) inspection after construction → (7), chemical analysis → (5), batching → (3) smelting → (4) stokehold, the inspection of raw and process materials → (2) packing warehouse-in.
One of production example of the present invention: only the batching in the above-listed technological process of production (2), smelting (3) and casting (5) are further described at this, all the other flow processs are ordinary method.
Batching (2): every stove is measured 100kg by norm
The prescription of getting pure material is:
Aluminium A
025Kg,
Mid-carbon fe-mn 43.5Kg(manganese content is 78%),
Steel scrap 31.5Kg.
Smelt (3); Processing condition and smelting program are as follows:
A) adopt medium-frequency induction furnace, magnesia crucible,
B) feed intake: drop into steel scrap earlier, intensification power 80KW～100KW,
C) treat scrap melting after, add ferromanganese in three batches, treat that ferromanganese all melts after, power is reduced to 20KW～30KW,
D) aluminium is added rapidly after, fusing power rises to 80KW and kept 1～2 minute, make its abundant consolute that stirs after, power is reduced to 20KW and is dragged for removing dross.
Pouring (5): after the on-the-spot sample analysis composition is qualified, pour in the mold, air cooling is to normal temperature after the demoulding.Require the light face not have major defect, no inclusion.Its substance is 0.6～1.2Kg, and it is shaped as circular or microscler bulk.If be cast into the annular bulk, then help further improving the deoxidizing capacity of time spent.
Embodiment: adopt the present invention-Al-Mn-Fe composite deoxidizer, carry out the production in-use testing in the second steel-making subsidiary factory of Shanghai iron and steel one factory.At duration of test, its 104 stoves of taking a sample, wherein, 71 stoves are deoxidations of the present invention of usefulness, add-on is the 0.53Kg/t steel, amounts to fine aluminium 0.13Kg/t steel; 33 stoves are fine aluminium reductors of usefulness, and add-on is the 0.48Kg/t steel.Contrast and experiment shows:
1, deoxidation effect of the present invention improves 19.4% than fine aluminium.
2, it is lower than using fine aluminium to use cost of the present invention.At present, unit price of the present invention is 6.7 yuan/Kg, and fine aluminium is 9.3 yuan/Kg.
Use the ton steel cost of deoxidation of the present invention to be
6.7 * 0.53=3.55(unit/t steel)
Use the ton steel cost of fine aluminium deoxidation to be
9.3 * 0.48=4.46(unit/t steel)
Use deoxidation of the present invention than using fine aluminium deoxidation cost to drop to
4.46-3.55=0.91(unit/t steel)
Produce 600000 tons of rimming steels per year with this factory and calculate, year cost descends and can reach
0.91 ten thousand yuan/year of * 600000=54.6()
3, use the present invention can save a large amount of bauxite resources.
Ton steel joint aluminium
0.48-0.13=0.35(kg/t steel)
Spring Festival holidays aluminium 0.35 * 600000=210(ton)
It is strong to experiment showed, that the present invention has a deoxidizing capacity, and price is low, uses advantages such as good in economic efficiency, and can save a large amount of bauxite resources.
Claims (1)
1, a kind of Al-Mn-Fe composite deoxidizer is specially adapted to rimming steel molten steel final deoxygenation, and it includes aluminium, manganese, iron and other impurity, and said other impurity comprises carbon, silicon, phosphorus, sulphur, copper etc., it is characterized in that it is (%) that weight percent is formed:
Aluminium 20～26,
Manganese 30～35,
Iron 38～48,
The impurity surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107299 CN1024928C (en) | 1992-02-26 | 1992-02-26 | Composite deoxidiser of Al-Mn-Fe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107299 CN1024928C (en) | 1992-02-26 | 1992-02-26 | Composite deoxidiser of Al-Mn-Fe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1075753A CN1075753A (en) | 1993-09-01 |
| CN1024928C true CN1024928C (en) | 1994-06-08 |
Family
ID=4942794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107299 Expired - Lifetime CN1024928C (en) | 1992-02-26 | 1992-02-26 | Composite deoxidiser of Al-Mn-Fe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024928C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059931C (en) * | 1998-10-22 | 2000-12-27 | 谢廷声 | Additive-aluminium-manganese-titanium alloy used for steelmaking final deoxygenation and low-alloy steel |
| CN101899603B (en) * | 2009-06-01 | 2012-05-23 | 上海申江锻造有限公司 | Method for preparing stainless steel |
| CN110331317A (en) * | 2019-07-03 | 2019-10-15 | 江苏正达炉料有限公司 | A kind of alumal and preparation method thereof |
-
1992
- 1992-02-26 CN CN 92107299 patent/CN1024928C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1075753A (en) | 1993-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C56 | Change in the name or address of the patentee |
Owner name: WUJIN CITY WUFAN ALUMINUM ALLOY CO., LTD. Free format text: FORMER NAME OR ADDRESS: WUJIN ALUMINIUM ALLOY ASSOCIATED FACTORY |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Wufan Alloy Aluminium Co., Ltd., Wujin Patentee before: Wujin Aluminium Alloy Associated Factory |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHANGZHOU WUFAN ALLOY CO., LTD. Free format text: FORMER NAME OR ADDRESS: WUJIN CITY WUFAN ALUMINUM ALLOY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: North Xiang Jiang Village 213023 Jiangsu city of Changzhou Province Patentee after: Changzhou Wufan Alloy Co., Ltd. Address before: 213023 Jiangsu city of Changzhou province. Patentee before: Wufan Alloy Aluminium Co., Ltd., Wujin |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120226 Granted publication date: 19940608 |