CN104419798A - Method for pre-desiliconizing molten iron by utilizing CAS-OB refining furnace - Google Patents
Method for pre-desiliconizing molten iron by utilizing CAS-OB refining furnace Download PDFInfo
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- CN104419798A CN104419798A CN201310398268.0A CN201310398268A CN104419798A CN 104419798 A CN104419798 A CN 104419798A CN 201310398268 A CN201310398268 A CN 201310398268A CN 104419798 A CN104419798 A CN 104419798A
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- molten iron
- desiliconization
- refining furnace
- cas
- spray gun
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000007670 refining Methods 0.000 title claims abstract description 26
- 238000009850 CAS-OB (composition adjustment by sealed argon bubbling with oxygen blowing) Methods 0.000 title claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011449 brick Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 4
- 239000003570 air Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 12
- 229910052710 silicon Inorganic materials 0.000 abstract description 10
- 239000010703 silicon Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007598 dipping method Methods 0.000 abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 101100373011 Drosophila melanogaster wapl gene Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 210000004483 pasc Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for pre-desiliconizing molten iron by utilizing a CAS-OB refining furnace, which is used for desiliconizing the molten iron by utilizing the existing CAS-OB refining furnace of a steel plant to provide low-silicon molten iron for a converter or an electric furnace, and comprises the following specific processes: adopting a special high-temperature-resistant magnesia carbon brick hot-metal ladle for desiliconization, firstly carrying out slag skimming treatment on molten iron, blowing oxygen or air by using a spray gun above a dipping cover of a refining furnace, and controlling the flow to be 5-10Nm3And h.t, stopping blowing by the top spray gun when the slag layer reaches 30-80mm, opening a bottom blowing gas valve for blowing and stirring, wherein the gas flow is as follows: 80-100 Nm3H is used as the reference value. After the slag layer is discharged, the cover is lowered, and oxygen is blown in by a spray gun above the dipping cover or the air flow is controlled to be 5-10Nm3And h.t, conveying the molten iron to a slagging-off position for slagging-off treatment. The invention utilizes the original refining furnace of a factory to desiliconize the molten iron, saves the problems of large equipment investment cost and occupied space, and realizes the production of low-silicon molten iron with high efficiency and low cost.
Description
Technical field
The invention belongs to hot metal in steelmaking preconditioning technique field, in particular, provide a kind of method utilizing CAS-OB refining furnace to produce hot metal containing low silicon.
Background technology
Desiliconization of hot metal process is an important step of hot metal pretreatment, and molten iron silicon content is high by bringing adverse consequences to the normal running of converter, increases steel-making cost.Reduce silicone content in molten iron and can alleviate the smelting burden of converter, reduce lime consumption, realize less-slag operation; Promote that dephosphorisation reaction carried out in advance at the blowing initial stage, contributing to the raising of converter dephosphorization rate, creating conditions for realizing high-efficiency steel-smelting.Facts have proved, when hot metal desiliconization process makes silicon content of hot metal be removed to less than 0.2% by more than 0.6%, steelmaking process lime consumption can drop to 15 ~ 20kg/ ton steel by 40 ~ 50kg/ ton steel, and refractory consumption rate reduces 30 ~ 40%, visible remarkable in economical benefits.Converter adopts hot metal containing low silicon to smelt, a series of benefit can be brought to converter operation, reduce slag making materials consumption, reduce the excessive and splash of slag, reduce slag to the erosion of furnace lining, furnace life improves, and improves manganese amount more than molten steel recovery rate and molten steel, the duration of blast of converter shortens, and productivity and steel quality improve; Reduce to natural discharge, environmental quality is improved.Therefore hot metal desiliconization has huge economic implications and social effect.
Desiliconization of hot metal method mainly contains several method: document 1(" dephosphorization of molten iron industrial analysis research ", Zhang Fei tiger etc., industry heating, 41st volume the 4th phase, 55-51 page), disclose a kind of desiliconization of hot metal method, enumerate domestic " Taiyuan Iron and Steel Co. " in literary composition and establish molten iron " three de-station " and desiliconization, dephosphorization, desulfurization process can be carried out to molten iron." three de-stations ", although can realize desiliconization of hot metal, its deficiency is need be many with equipment, and investment is large, floor space is large, complex process, heat waste are large.As document 2(" commerical test of wash heat method desiliconization of hot metal ", Zhang Jiexin etc., steel-making, the 28th volume the 2nd phase, 44-47 page), disclose a kind of wash heat desiliconization of hot metal method, the method drops into without the need to extras, drop into desiliconization agent and can realize desiliconization of hot metal, but its weak point is by process of tapping a blast furnace, desiliconization rate is low, and desiliconization rate is only 52.69%; Desiliconization agent consumption is high, and desiliconization agent consumption is at more than 30kg/t; Desiliconization process easily produces foamy slag, controls bad foamy slag and easily overflows.As document 3(" Liquid Iron Pretreatment Technology present status and prospect ", Pan Xiulan etc., world steel, the 6th phase in 2010,34-36 page), disclose the method for some desiliconization of hot metal: blast furnace discharge yard casting house, fish torpedo ladle and iron ladle pre-desiliconizing adopt winding-up Fe
2o
3, and the method for a small amount of CaO flux carries out desiliconization of hot metal, can play certain desiliconization effect, but all there are some problems, as needs drop into blowing device, bring cost and spatial arrangement problem, add desiliconization agent in addition and also can bring the problem that hot metal temperature drop is large, bring adverse consequences to lower road technique.Therefore also there is corresponding problem in above-mentioned desilication method, can not meet demand that is efficient, low cost steel-making, so the desiliconization of hot metal method requiring study new.
The ultimate principle of CAS-OB refining furnace is under ladle bottom blowing hydrogen stirs the condition of molten steel, the operations such as the deoxidation of molten steel, alloying and intensification are completed in impregnating cover inside, solve the stirring of traditional Argon and cause the Molten Steel over-oxidation problem that molten steel is exposed, slag causes, there is unique advantage in molten steel heating, alloying and removal of inclusions.But because molten iron carbon content is higher, during the oxygen blast desiliconization of CAS-OB refining furnace, do not adopt a set of special technical process, easily produce splash accident, therefore, the unmanned CAS-OB refining furnace that adopts carries out desiliconization of hot metal treatment technology so far.In addition, common iron ladle adopts the refractory brick that refractoriness is lower usually, and the high temperature produced during oxygen blast desiliconization is by Eroded refractory brick, and this is also the factor that restriction CAS-OB refining furnace carries out desiliconization of hot metal process.
Summary of the invention
The object of the invention is to, disclose a kind of method utilizing CAS-OB refining furnace hot metal desiliconization, application CAS-OB refining furnace carries out desiliconization process to molten iron, overcomes the problem existing for current desiliconization of hot metal method.Avoid building the extra auxiliary equipments such as molten iron " three de-stations " and can desiliconization of hot metal be realized.By bottom blown gas deslagging, carry out oxygen blast after falling cover or air carries out desiliconization process to molten iron, owing to not needing additional desiliconization agent, hot metal temperature drop problem can be avoided can to prevent again the splash that formation causes of foamy slag to overflow slag problem.Therefore can save large number quipments input cost and avoid complicated operational process of craft, realize efficient, low cost production hot metal containing low silicon.
The present invention is based on conventional smelting technology, less to normal Influence of production, when not increasing equipment investment, utilize the existing CAS-OB refining furnace of steelworks to carry out desiliconization process to molten iron, for converter or electric furnace provide hot metal containing low silicon.
Concrete technology is as follows:
1) the resistant to elevated temperatures magnesia carbon brick iron ladle adopting desiliconization special, is transported to molten iron position of skimming, first takes off Slag treatment to molten iron.After having skimmed, thermometric sampling is carried out to molten iron.
2) molten iron is transported to CAS-OB refining furnace station, utilize the spray gun above CAS-OB refining furnace impregnating cover to be blown into the one of oxygen or air, gas flow controls at 5-10Nm
3/ h t.
3) due to can slag blanket be formed on molten iron surface after silicon oxidation in molten iron, when slag blanket reaches 30-80mm, stop top lance blowing, open bottom blown gas valve and carry out air blowing stirring, gas flow: 80-100 Nm
3/ h.
4) slag blanket falls cover after arranging, and now leaching cover is interior without slag or few slag, and continue to adopt the spray gun above impregnating cover to be blown into the one of oxygen or air, gas flow controls at 5-10Nm
3/ h t.
5), after desiliconization process completes, rise impregnating cover and spray gun, molten iron is transported to position of skimming, Slag treatment is taken off to molten iron.
6) after having skimmed, carry out thermometric sampling, if desiliconization amount reaches requirement, qualified molten iron is winched to next process by available overhead traveling crane.
If desiliconization amount does not reach requirement can repeat desiliconization operation by repeating step 2-6.
Slag treatment of taking off in above-mentioned steps 1 is to ensure that spray gun is blown into oxygen or a kind of of air fully can react with the silicon in molten iron, improves desilication efficiency.
In step 3, when slag blanket reaches 30-80mm, stopping spray gun blowing, is to prevent splash and excessive slag.Bottom blown gas can be the one of argon gas or nitrogen.
In step 4, falling cover is to ensure oxygen or air pasc reaction in without slag environment and molten iron, not only can ensureing desilication efficiency but also splash and excessive slag can be avoided to produce.
In step 5, carry out taking off slag operation, object is in order to avoid desiliconization slag is brought into next procedure, brings adverse consequences to next procedure.
The present invention carries out desiliconization process owing to adopting CAS-OB refining furnace to molten iron, can, when not increasing equipment investment, utilize the original refining furnace of factory to carry out desiliconization to molten iron, has saved the problem that a large amount of equipment investment costs and place take.By bottom blown gas deslagging, oxygen blast gas is carried out or air carries out desiliconization process to molten iron after falling cover, owing to not needing additional desiliconization agent, hot metal temperature drop problem can be avoided can to prevent again the splash that formation causes of foamy slag to overflow slag problem, realize efficient, low cost production hot metal containing low silicon.
Embodiment:
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1:
1) adopt desiliconization Special iron water pot, molten iron is transported to position of skimming, first Slag treatment is taken off to molten iron.After having skimmed, thermometric sampling is carried out to molten iron.Actual measurement molten iron temperature is 1313 DEG C, and silicone content is 0.67%.
2) molten iron is transported to CAS-OB refining furnace station, utilize the spray gun above CAS-OB refining furnace impregnating cover to be blown into oxygen, gas flow controls at 6Nm
3/ h t.
3) when slag blanket reaches 40mm, stop spray gun blowing, open bottom blown gas valve and carry out nitrogen blowing stirring, gas flow: 90 Nm
3/ h.
4) slag blanket falls cover after arranging, and continues to adopt the spray gun above impregnating cover to be blown into oxygen, and gas flow controls at 5Nm
3/ h t.
5), after desiliconization process completes, rise impregnating cover and spray gun, molten iron is transported to position of skimming, Slag treatment is taken off to molten iron.
6) after having skimmed, carry out thermometric sampling, actual measurement molten iron temperature is 1346 DEG C, and silicone content is 0.19%.Desiliconization amount meets the requirements, and with overhead traveling crane, qualified molten iron is winched to next process.
The visible not only desiliconization effect of result is obvious, and molten iron temperature no decline rising 33 DEG C on the contrary.Molten iron temperature loss is turn avoid while realizing desiliconization.
Embodiment 2:
1) adopt desiliconization Special iron water pot, molten iron is transported to position of skimming, first Slag treatment is taken off to molten iron.After having skimmed, thermometric sampling is carried out to molten iron.Actual measurement molten iron temperature is 1345 DEG C, and silicone content is 0.64%.
2) molten iron is transported to CAS-OB refining furnace station, utilize the spray gun above CAS-OB refining furnace impregnating cover to be blown into air, gas flow controls at 8Nm
3/ h t.
3) when slag blanket reaches 50mm, stop spray gun blowing, open bottom blown gas valve and carry out blowing argon gas stirring, gas flow: 95 Nm
3/ h.
4) slag blanket falls cover after arranging, and continues to adopt the spray gun above impregnating cover to be blown into air, and gas flow controls at 9Nm
3/ h t.
5), after desiliconization process completes, rise impregnating cover and spray gun, molten iron is transported to position of skimming, Slag treatment is taken off to molten iron.
6) after having skimmed, carry out thermometric sampling, actual measurement molten iron temperature is 1369 DEG C, and silicone content is 0.21%.Desiliconization amount meets the requirements, and with overhead traveling crane, qualified molten iron is winched to next process.
The visible not only desiliconization effect of result is obvious, and molten iron temperature no decline rising 24 DEG C on the contrary.Molten iron temperature loss is turn avoid while realizing desiliconization.
Claims (1)
1. utilize a method for CAS-OB refining furnace hot metal desiliconization, it is characterized in that, adopt conventional smelting technology, utilize CAS-OB refining furnace to carry out desiliconization process to molten iron, concrete technology is as follows:
1) the resistant to elevated temperatures magnesia carbon brick iron ladle adopting desiliconization special, is transported to molten iron position of skimming, first takes off Slag treatment to molten iron, carry out thermometric sampling to molten iron;
2) molten iron is transported to CAS-OB refining furnace station, utilize the spray gun above CAS-OB refining furnace impregnating cover to be blown into the one of oxygen or air, gas flow controls at 5-10Nm
3/ h t;
3) when slag blanket reaches 30-80mm, stop top lance blowing, open bottom blown gas valve and carry out air blowing stirring, bottom blown gas is the one of argon gas or nitrogen, gas flow: 80-100 Nm
3/ h;
4) slag blanket arranges rear decline impregnating cover, continues to adopt the spray gun above impregnating cover to be blown into the one of oxygen or air, and gas flow controls at 5-10Nm
3/ h t;
5), after desiliconization process completes, rise impregnating cover and spray gun, molten iron is transported to position of skimming, Slag treatment is taken off to molten iron;
6) after having skimmed, carry out thermometric sampling, if desiliconization amount reaches requirement, with overhead traveling crane, qualified molten iron is winched to next process;
If desiliconization amount does not reach requirement repeating step 2-6 repeat desiliconization operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398268.0A CN104419798B (en) | 2013-09-05 | 2013-09-05 | Method for pre-desiliconizing molten iron by utilizing CAS-OB refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398268.0A CN104419798B (en) | 2013-09-05 | 2013-09-05 | Method for pre-desiliconizing molten iron by utilizing CAS-OB refining furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104419798A true CN104419798A (en) | 2015-03-18 |
| CN104419798B CN104419798B (en) | 2017-02-22 |
Family
ID=52969919
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310398268.0A Active CN104419798B (en) | 2013-09-05 | 2013-09-05 | Method for pre-desiliconizing molten iron by utilizing CAS-OB refining furnace |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176192A (en) * | 2020-09-24 | 2021-01-05 | 衢州华友钴新材料有限公司 | Deep desiliconization and demagging method for low-silicon low-magnesium impurity alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394165A (en) * | 1981-08-19 | 1983-07-19 | Nippon Steel Corporation | Method of preliminary desiliconization of molten iron by injecting gaseous oxygen |
| JP4196997B2 (en) * | 2006-02-24 | 2008-12-17 | 住友金属工業株式会社 | Hot metal processing method |
| CN101376916A (en) * | 2008-09-29 | 2009-03-04 | 山西太钢不锈钢股份有限公司 | Pretreatment method of dephosphorization, desiliconization and desophorization for hot metal |
| CN101389774A (en) * | 2006-02-27 | 2009-03-18 | 杰富意钢铁株式会社 | Blowing lance for refining, blowing lance apparatus for refining, method of desiliconizing of molten iron, and method of pretreatment of molten iron |
-
2013
- 2013-09-05 CN CN201310398268.0A patent/CN104419798B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394165A (en) * | 1981-08-19 | 1983-07-19 | Nippon Steel Corporation | Method of preliminary desiliconization of molten iron by injecting gaseous oxygen |
| JP4196997B2 (en) * | 2006-02-24 | 2008-12-17 | 住友金属工業株式会社 | Hot metal processing method |
| CN101389774A (en) * | 2006-02-27 | 2009-03-18 | 杰富意钢铁株式会社 | Blowing lance for refining, blowing lance apparatus for refining, method of desiliconizing of molten iron, and method of pretreatment of molten iron |
| CN101376916A (en) * | 2008-09-29 | 2009-03-04 | 山西太钢不锈钢股份有限公司 | Pretreatment method of dephosphorization, desiliconization and desophorization for hot metal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176192A (en) * | 2020-09-24 | 2021-01-05 | 衢州华友钴新材料有限公司 | Deep desiliconization and demagging method for low-silicon low-magnesium impurity alloy |
| CN112176192B (en) * | 2020-09-24 | 2022-06-10 | 衢州华友钴新材料有限公司 | Deep desiliconization and demagging method for low-silicon low-magnesium impurity alloy |
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| CN104419798B (en) | 2017-02-22 |
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