CN101798617A - Stainless steel dephosphorization carburant - Google Patents
Stainless steel dephosphorization carburant Download PDFInfo
- Publication number
- CN101798617A CN101798617A CN201010133668A CN201010133668A CN101798617A CN 101798617 A CN101798617 A CN 101798617A CN 201010133668 A CN201010133668 A CN 201010133668A CN 201010133668 A CN201010133668 A CN 201010133668A CN 101798617 A CN101798617 A CN 101798617A
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- CN
- China
- Prior art keywords
- stainless steel
- parts
- carburant
- dephosphorization
- aod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses stainless steel dephosphorization carburant, aiming at solving the problems of large lime consumption of an AOD (Argon Oxygen Decarburization) furnace, reduced service life of the AOD furnace and high cost due to deoxygenation by using silicon-aluminum deoxidant during stainless steel smelting in the AOD furnace. The stainless steel dephosphorization carburant comprises the following components in parts by weight: 3-8 parts of metal calcium, 8-19 parts of ferrochrome powder, 0-5 parts of aluminum powder, 73-89 parts of powdered clean coal and 3-8 parts of binder. By using the ferrochrome and the calcium to carry out deoxygenation, the invention completes molten steel carburetion and simultaneously reduces ferrochrome consumption under the condition of not using ferrosilicon and aluminum; and through the use of the stainless steel dephosphorization carburant, the consumption of ferrosilicon, coke, lime and fluorite can be saved during the stainless steel smelting in the AOD furnace, and meanwhile, the ferrochrome consumption of the AOD is saved, thereby meeting the requirements of reducing the cost of the stainless steel.
Description
Technical field
The present invention relates to the stainless steel smelting technology, be specifically related to a kind of stainless steel dephosphorization carburant.
Background technology
At present, when smelting stainless steel, the following operational path of general employing:
Molten iron → converter → dephosphorization molten steel → AOD stove → continuous casting
The carbon content of molten iron is about 4.0%, smelts dephosphorization in converter, need be blown into a large amount of oxygen, and in dephosphorization, the carbon content of molten steel is reduced to 0.03%～0.10%:
P+O
2＝P
2O
5 C+O＝CO
C+O
2＝CO
2
It (is 800～1000ppm) that a large amount of oxygen levels is arranged in the dephosphorization molten steel like this, and the dephosphorization molten steel is when entering AOD stove smelting stainless steel, the existence of oxygen can have influence on the calculating of AOD stove ferrosilicon when reduction period, therefore need carry out deoxidation to the converter dephosphorization molten steel, conventional convertor deacidification adopts material siliceous, aluminium element to carry out deoxidation, and is as follows:
Si+2[O]＝SiO
2
2Al+3[O]＝Al
2O
3
AOD stove smelting stainless steel needs certain temperature, is by adding ferrosilicon and coke provides heat at present, but can not carry out carburetting to the dephosphorization molten steel fully when adding coke, and the coke utilization ratio is low.
Si+O
2＝SiO2 ΔH
φ＝-817682(KJ·Kg/mol)
C+O
2＝CO
2 ΔH
φ＝-418072(KJ·Kg/mol)
No matter be that the dephosphorization molten steel uses ferrosilicon, aluminium deoxidation, still add ferrosilicon and carry out additional heat that the oxidation products that generates after two kinds of element oxidations need consume a large amount of lime, to satisfy the basicity of arts demand at the AOD stove.
(SiO
2)+(CaO)＝(2CaO·SiO
2)
(Al
2O
3)+3(CaO)＝(3CaO·Al
2O
3)
After adding large quantities of lime, the quantity of slag of AOD stove smelting stainless steel increases, and the quantity of slag of present situation is 35～40 tons, has reduced the recovery rate of chromium, increases the consumption of AOD reduction ferrosilicon simultaneously, the life-span of having reduced the AOD stove.
In sum, when the AOD stove uses converter dephosphorization molten steel smelting stainless steel, need certain carbon content that heat is provided, should reduce silicon, aluminium with and oxidation products SiO2, Al
2O
3, the consumption of ferrosilicon when reducing lime consumption and reduction period.
Under this background, the invention stainless steel dephosphorization carburant carries out deoxidation, carburetting to the dephosphorization molten steel, satisfies the processing requirement of AOD stove smelting stainless steel.
Summary of the invention
The present invention uses silicon, aluminium deoxidizer to carry out deoxidation and AOD stove to add ferrosilicon and carry out additional heat in order to have solved the dephosphorization molten steel, use silicon, aluminium deoxidation and additional heat to make all and need consume large quantities of lime, cost height not only, and can cause the reduction of AOD stove big with the ferrosilicon consumption, reduced the life-span of AOD stove, reduced the recovery rate of chromium, and provide a kind of stainless steel dephosphorization carburant, act on the dephosphorization molten steel, carry out deoxidation and improve carbon content, to reduce AOD stove ferrosilicon consumption when the reduction period, reduce lime consumption, reach the purpose that reduces the stainless steel cost.
The present invention is achieved by the following technical solutions:
Stainless steel dephosphorization carburant, its component are calcium metal, ferrochrome powder, aluminium powder, powdery cleaned coal, binding agent, and the parts by weight of each component are:
Calcium metal 3～8 ferrochrome powder 8～19
Aluminium powder 0～5 powdery cleaned coal 73～89
Binding agent 3～8.
Further, described binding agent is a pellet binder.
The present invention utilizes calcium, chromium to carry out deoxidation, utilizes cleaned coal to carry out carburetting, and the content of silicon and aluminium in the reduction dephosphorization molten steel in use, adds in the converter molten steel and reacts, to satisfy AOD stove smelting stainless steel processing requirement, its deoxidation principle:
Ca+[O]＝CaO
2Cr+3[O]＝Cr
2O
3
2Al+3[O]＝Al
2O
3
Stainless steel dephosphorization carburant of the present invention is compared test, and when smelting 170 tons of stainless steels, a kind of technology is used stainless steel dephosphorization carburant, promptly improve technology, a kind of stainless steel dephosphorization carburant that do not use, i.e. common process, various process datas contrasts are as shown in the table:
Improve the purpose that technology has not only reached dephosphorization carburetting, and the market price of the various raw materials of reference, calculate for 6500 yuan/ton according to 580 yuan/ton in price lime, 380 yuan/ton in fluorite, 2010 yuan/ton in coke, 6200 yuan/ton of ferrosilicon, dephosphorization carburant, shown in last table, total input cost can reduce by 1180 yuan, and preliminary corresponding ton steel reduces about 10 yuan/ton.The raising of chromium recovery rate simultaneously, tap to tap time shorten, and AOD furnace life (AOD furnace life whole nation best level 200 times is generally the life-span 120～130 times) improves, and comprehensive cost can reduce about 50 yuan/ton.
The present invention compared with prior art has the following advantages:
The present invention uses ferrochrome and calcium to carry out deoxidation, reduced the usage quantity of silicon, aluminum; The described stainless steel dephosphorization carburant of the application of the invention when AOD stove smelting stainless steel, can be saved the consumption of ferrosilicon, coke, lime and fluorite, and AOD is provided work-ing life, improves the recovery rate of chromium simultaneously, has reached the needs that reduce the stainless steel cost.
Embodiment
Embodiment 1
Get calcium metal 30Kg, ferrochrome powder 80Kg, aluminium powder 50Kg, powdery cleaned coal 730Kg stirs, and with high-strength agglomerates of sintered pellets binding agent 30Kg, is pressed into bulk behind the mixing, is finished product.
Embodiment 2
Get calcium metal 80Kg, ferrochrome powder 130Kg, aluminium powder 30Kg, powdery cleaned coal 800Kg stirs, and with high-strength agglomerates of sintered pellets binding agent 50Kg, is pressed into bulk behind the mixing, is finished product.
Embodiment 3
Get calcium metal 50Kg, ferrochrome powder 190Kg, powdery cleaned coal 890Kg stirs, and with high-strength agglomerates of sintered pellets binding agent 40Kg, is pressed into bulk behind the mixing, is finished product.
Claims (2)
1. a stainless steel dephosphorization carburant is characterized in that component is a calcium metal, ferrochrome powder, aluminium powder, powdery cleaned coal, binding agent, and the parts by weight of each component are:
Calcium metal 3～8 ferrochrome powder 8～19
Aluminium powder 0～5 powdery cleaned coal 73～89
Binding agent 3～8.
2. according to stainless steel dephosphorization carburant shown in the claim 1, it is characterized in that described binding agent is a pellet binder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133668A CN101798617A (en) | 2010-03-24 | 2010-03-24 | Stainless steel dephosphorization carburant |
| CN2010102595210A CN101892349A (en) | 2010-03-24 | 2010-08-23 | Stainless steel dephosphorized carburant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133668A CN101798617A (en) | 2010-03-24 | 2010-03-24 | Stainless steel dephosphorization carburant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101798617A true CN101798617A (en) | 2010-08-11 |
Family
ID=42594461
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010133668A Pending CN101798617A (en) | 2010-03-24 | 2010-03-24 | Stainless steel dephosphorization carburant |
| CN2010102595210A Pending CN101892349A (en) | 2010-03-24 | 2010-08-23 | Stainless steel dephosphorized carburant |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102595210A Pending CN101892349A (en) | 2010-03-24 | 2010-08-23 | Stainless steel dephosphorized carburant |
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|---|---|
| CN (2) | CN101798617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868247A (en) * | 2017-03-21 | 2017-06-20 | 山东南山铝业股份有限公司 | A kind of carburetting ball used for casting pre-roasting anode, its preparation method and phosphorous pig iron carbon increasing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628692A (en) * | 2019-01-28 | 2019-04-16 | 江苏嘉耐高温材料有限公司 | Dedicated carburant of Refining Clean Steel in ASEA-SKF and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212408C (en) * | 2003-09-04 | 2005-07-27 | 吴光亮 | Carburant for steel-making and producing process and method of using thereof |
| CN1632135A (en) * | 2004-11-11 | 2005-06-29 | 杨俊表 | Use of cleaned coal or semi coke in preparation of coal base carburant |
| CN1288256C (en) * | 2005-04-11 | 2006-12-06 | 上海盛宝钢铁冶金炉料有限公司 | Carburant for manganese-carbon alloy |
-
2010
- 2010-03-24 CN CN201010133668A patent/CN101798617A/en active Pending
- 2010-08-23 CN CN2010102595210A patent/CN101892349A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868247A (en) * | 2017-03-21 | 2017-06-20 | 山东南山铝业股份有限公司 | A kind of carburetting ball used for casting pre-roasting anode, its preparation method and phosphorous pig iron carbon increasing method |
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| Publication number | Publication date |
|---|---|
| CN101892349A (en) | 2010-11-24 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20100811 |