CN1153217A - Production process for Al-Mn-Si compound deoxidizer - Google Patents
Production process for Al-Mn-Si compound deoxidizer Download PDFInfo
- Publication number
- CN1153217A CN1153217A CN 95113630 CN95113630A CN1153217A CN 1153217 A CN1153217 A CN 1153217A CN 95113630 CN95113630 CN 95113630 CN 95113630 A CN95113630 A CN 95113630A CN 1153217 A CN1153217 A CN 1153217A
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- mother alloy
- production process
- steel
- compound deoxidizer
- ferrosilicon
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- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A compound Al-Mn-Si deoxidant as additive used in smelting steel is prepared through smelting poor manganese ore in DC electric furnace to obtain Si-Mn alloy, putting the Si-Mn alloy in DC ladle furnace, addition of ferrosilicon, waste steel and aluminium, and refining, and features low P content, not dusting, and proper components. If it is used in smelting steel, the impurities in steel can be reduced and the nature of said impurities can be controlled.
Description
The taking off of usefulness that the present invention relates to make steel supported agent or additive, particularly contains the iron alloy of elements such as aluminium, manganese, silicon.
Present stage steel-making is generally adopted single silicon, manganese, aluminium with taking off foster agent, and these single elements are made the weak effect of reductor, smelts that the nonmetallic inclusionsin steel that is many, steel is bad.In recent years, many new reductors have appearred in various places, as＜＜Fe--Al--Si〉(Si18--32%, Al48--52%, the Fe surplus),＜＜Fe--Ba--Al--Si〉〉 (Al=35%), though these reductor deoxidation effects increase, the aluminium consumption is big, and when the aluminium consumption is excessive, there are crackle and pore, Chinese patent in the surface of Finished Steel " multiple combined deoxidizing agent; additive ", and (publication number: 1082117) provide a kind of silicon Al-Mn alloy, it is to adopt remelting process, smelting temperature generally is controlled at about 1600 ℃, or adopting the hot method in ore deposit, temperature is controlled at about 1700 ℃, produces Ulmal.
The objective of the invention is to adopt two-step approach, utilize poor manganese ore to produce silicomanganese product--mother alloy earlier, add other elements such as aluminium again, be refined into Al-Mn-Si compound deoxidizer through direct current furnace.
Realize that technical scheme of the present invention is as follows:
A, utilize poor manganese ore and add silica, coke, lime and it is smelted into silicomanganese, be mother alloy, wherein contain manganese 55--65%, siliceous 15--30% in the mother alloy Chemical Composition through direct current furnace,
B, again the mother alloy of gained among a is put into DC ladle furnace, and insert auxiliary material: ferrosilicon, steel scrap, aluminium ingot, dephosphorizing agent, slag making material, air release agent, refining then, its mother alloy and auxiliary material are 65-85: 10-25: 10-25: 4-7: 2-5: 10-20: 0.5-2 according to the proportioning of above-mentioned order, so promptly get the alleged Al-Mn-Si compound deoxidizer of the present invention
Advantage of the present invention is: product is low-phosphorous, composition suitably, not efflorescence, in steel-making, use the present invention, can reduce the steel inclusion total amount, and may command inclusion character.
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is a process flow sheet of the present invention.
Manufacture craft is as follows:
1), utilize poor manganese ore and add ferrosilicon (silicon content 60-75%), silicomanganese (mother alloy) smelted into it by coke, lime in the 1800KVA electric furnace.
2), choose auxiliary material:
Ferrosilicon: with FeSi75-B or FeSi65, its Chemical Composition meets GB2772-87.
Aluminium: the aluminium ingot of choosing Al＞99%, Cu＜0.02%.
Steel scrap: can select straight carbon steel crop scrap stock for use, not allow with shavings, car bits, pig scrap and steel alloy steel scrap.
Dephosphorizing agent: use Ca24Si60, its Chemical Composition meets GB3419-82, also available ferrosilicon, silicon barium aluminium, silicon magnesium.
Slag making material: be the mixture of lime, fluorite, wherein lime: with Ca＞88%, P＜0.02%, granularity 5--15m/m, fluorite: Chemical Composition requires to reach its CaF of first grade standard＞95% of YB325-81, SiO＜4.7%, S＜0.1%, P＜0.06%, granularity 1-15m/m
Air release agent: be the mixture of salt and sodium aluminum fluoride or oryolite, wherein salt: industrial table salt, the sodium aluminum fluoride granularity is＜2m/m.
3), after the 1800KVA electrosmelting goes out mother alloy, through calm, skim, weighing, be blended into refining furnace by the submarine gate again.
4) with addition of ferrosilicon (warming in advance), refining 10 minutes, temperature is controlled at about 1350 ℃.The slag making material divides and is blended in the stove for three times, and three times the amount of being blended into is respectively 3/7,3/7,4/7.
5), dephosphorization:
After the concise end, add dephosphorizing agent again, and it is pressed into prevents scaling loss in the slag charge, the dephosphorization time was grasped at 15--20 minute.
6), composition is adjusted in refining:
The aluminium block baking is added in the furnace hearth later, and temperature is controlled at about 1350 ℃, waits to melt back refining 1 minute, adds the steel scrap of warming again.
7), the degassing:
After treating scrap melting, add air release agent (salt, sodium aluminum fluoride), refining 3 minutes starts blower fan gas is taken away, and temperature is controlled at about 1300 ℃, after the degassing finishes, has a power failure and comes out of the stove immediately.
Above-mentioned when refining the proportioning of mother alloy and ferrosilicon, steel scrap, aluminium ingot, dephosphorizing agent, slag making material, air release agent be: 70: 15: 15: 6: 30: 15: 1
Claims (3)
1, a kind of production process for Al-Mn-Si compound deoxidizer is characterized in that:
A, utilize poor manganese ore and add silica, coke, lime and it is smelted into silicomanganese, be mother alloy, wherein contain manganese 55--65%, siliceous 15--30% in the mother alloy Chemical Composition through direct current furnace,
B, again the mother alloy of gained among a is put into DC ladle furnace, and insert auxiliary material: ferrosilicon, steel scrap, aluminium ingot, dephosphorizing agent, slag making material, air release agent, refining then, its mother alloy and auxiliary material according to the proportioning of above-mentioned order are: 65-85: 10-25: 10-25: 4-7: 2-5: 10-20: 0.5-2
Promptly get the alleged Al-Mn-Si compound deoxidizer of the present invention.
2, a kind of production process for Al-Mn-Si compound deoxidizer described in claim 1 is characterized in that: described slag making material is the mixture of lime and fluorite, and divides three addings before adding dephosphorizing agent, and its additional proportion is 3/7,3/7,4/7.
3, a kind of production process for Al-Mn-Si compound deoxidizer described in claim 1 is characterized in that: described aluminium, ferrosilicon, steel scrap will heat through overbaking before adding DC ladle furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95113630 CN1153217A (en) | 1995-12-27 | 1995-12-27 | Production process for Al-Mn-Si compound deoxidizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95113630 CN1153217A (en) | 1995-12-27 | 1995-12-27 | Production process for Al-Mn-Si compound deoxidizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153217A true CN1153217A (en) | 1997-07-02 |
Family
ID=5080018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95113630 Pending CN1153217A (en) | 1995-12-27 | 1995-12-27 | Production process for Al-Mn-Si compound deoxidizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153217A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059717C (en) * | 1997-09-23 | 2000-12-20 | 宝山钢铁(集团)公司 | Apparatus for electrolysis deoxidation of solid electrolyte |
| 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 |
| CN103131820A (en) * | 2013-02-20 | 2013-06-05 | 河南鹏钰集团有限公司 | Silicomanganese efficient absorption alloy ball and preparation method thereof |
| CN106350638A (en) * | 2015-07-24 | 2017-01-25 | 谢廷声 | Alloy deoxidizer for steelmaking and preparation method |
-
1995
- 1995-12-27 CN CN 95113630 patent/CN1153217A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059717C (en) * | 1997-09-23 | 2000-12-20 | 宝山钢铁(集团)公司 | Apparatus for electrolysis deoxidation of solid electrolyte |
| 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 |
| CN103131820A (en) * | 2013-02-20 | 2013-06-05 | 河南鹏钰集团有限公司 | Silicomanganese efficient absorption alloy ball and preparation method thereof |
| CN106350638A (en) * | 2015-07-24 | 2017-01-25 | 谢廷声 | Alloy deoxidizer for steelmaking and preparation method |
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