CN1067110C - 在电炉内熔炼的不锈钢上产生发泡炉渣的方法 - Google Patents
在电炉内熔炼的不锈钢上产生发泡炉渣的方法 Download PDFInfo
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- slag
- stainless steel
- powder
- carbon
- oxide
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Links
- 239000002893 slag Substances 0.000 title claims abstract description 40
- 239000010935 stainless steel Substances 0.000 title claims abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 14
- 238000005187 foaming Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract 5
- 239000000843 powder Substances 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 11
- 150000004706 metal oxides Chemical group 0.000 claims abstract description 11
- 229910052799 carbon Chemical group 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910000464 lead oxide Inorganic materials 0.000 claims description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 9
- 229960001296 zinc oxide Drugs 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 235000021190 leftovers Nutrition 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
- C21C2005/366—Foam slags
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2300/00—Process aspects
- C21C2300/02—Foam creation
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/961—Treating flue dust to obtain metal other than by consolidation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Powder Metallurgy (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
一种在电炉内熔炼的不锈钢上产生发泡炉渣的方法，特点在于：
-向所说的炉渣内引入一种粉末，在其组成中含有至少一种金属氧化物和碳，
-在所说的粉末中存在的至少一种氧化物通过与碳进行的反应被还原，在炉渣中形成气泡，所说的气泡基本由气态形式的金属氧化物中的金属和一氧化碳组成，炉渣中存在的气泡使炉渣以温度的泡沫的形式存在。
Description
本发明涉及一种在电炉内熔炼的不锈钢上产生发泡炉渣的方法。
在电炉内熔炼不锈钢的领域内，通过在电极和炉内的装料之间产生电弧，使炉内装料的铁渣、下脚料和铁基合金转变成金属液。
钢的生产容易产生灰尘等残余产物，通常用收尘器回收，其中约90％以球团的方式重新送入电炉内进行回收，其余10％含有太多的氧化锌，目前是储存起来。熔炼后除去炉渣。
在熔炼非不锈钢的领域内，炉渣发泡的原理是基于所用的炉渣内的氧化铁的还原。通过向炉内注入碳粉进行氧化铁的还原，这种还原反应产生一氧化碳。一氧化碳的气泡被限制在熔融的炉渣内使炉渣发泡，从而增大其体积。泡沫形式的炉渣涂敷在电极的端部，防护耐火材料受到的电辐射，这使得在电极消耗、电消耗和耐火材料消耗方面得到节约。
在熔炼不锈钢的情况下，炉渣不能足够地富含氧化铁，因此，在生产非不锈钢中采用的炉渣发泡的原理不再适用。
本发明的目的是提供一种在电炉内的熔融不锈钢上产生可以控制的稳定的发泡炉渣的方法，即通过使炉渣改性在所说的炉渣内产生发泡作用。
本发明的主题是提供一种在电炉内熔炼的不锈钢上产生发泡炉渣的方法，特点在于：
-向炉渣内引入一种粉末，其组成中含有至少一种金属氧化物和碳，
-粉末中存在的至少一种氧化物通过与碳反应被还原，在炉渣中形成基本由气态形式的金属氧化物的金属和一氧化碳组成的气泡，炉渣中存在的气泡使炉渣以稳定的泡沫形式存在。
本发明的其它特点是：
-所说的金属氧化物是易挥发元素的氧化物，
-所说的金属氧化物选自氧化锌和氧化铅，
-至少一部分粉末来自用电炉生产所说的钢产生的灰尘，
-通过干流体的喷射引入所说的粉末，
-所说的流体选自氮气和氩气。
下面的描述将使本发明更好地被理解。
本发明涉及一种在电炉内生产的不锈钢上产生发泡炉渣的方法。
根据本发明，以粉末的形式向生产不锈钢的电炉内和炉渣内引入一种金属氧化物和碳，金属氧化物通过与碳进行的还原反应，一方面形成金属氧化物的金属元素的气体，另一方面，形成一氧化碳，由这些气体产生包裹在炉渣内的气泡，使炉渣以稳定的泡沫的形式存在。
根据本发明，所说的粉末在其组成中含有氧化锌。所说的粉末由高锌含量的电炉灰组成，这种高锌含量的电炉灰是在钢厂中回收所说的炉灰时，由于ZnO的逐渐富集而产生的。
高锌含量的电炉灰的适用使得使用来自不锈钢生产的副产品成为可能。优选地使用的氧化锌中的锌元素参与气泡的形成，因为锌在所说的炉渣的温度下以气态存在。
氧化锌被碳还原得到气态的锌和一氧化碳，根据反应：
这两种物质都会引起炉渣的发泡。
在应用实施例中，通过喷射器向电炉内喷射500～1000kg高锌含量的粉末。为了避免由于空气中水分的影响产生爆炸的危险，喷射的流体优选的是氮气。
根据本发明，生产不锈钢的碱性炉渣的组成为：35％～40％的SiO2、40％～45％的CaO、5％的Cr2O3、5％的Al2O3、其余的由少量的MnO和MgO以及少于1％的FeO构成。这种炉渣实际上不合氧化铁。
由于氧化锌被碳还原以及所得的气体，发现碱性炉渣的厚度增大，达到了几十厘米，所说的炉渣以泡沫的形式涂敷在供电电极上。得到的发泡的炉渣是可以控制的并且是稳定的。
Claims (4)
1、在电炉内熔炼的不锈钢上产生发泡炉渣的方法，特点在于：
-向所说的炉渣内引入一种粉末，其组成中含有至少一种选自氧化锌和氧化铅的金属氧化物和碳，
-在所说的粉末中存在的至少一种氧化物通过与碳进行的反应被还原在所说的炉渣内形成气泡，所说的气泡基本由气态形式的所说的金属氧化物中的金属和一氧化碳组成，在所说的炉渣中存在的气泡使炉渣以稳定的泡沫的形式存在。
2、根据权利要求1的方法，特点在于至少一部分粉末来自通过电炉生产所说的钢产生的灰尘。
3、根据权利要求1或2的方法，特点在于所说的粉末通过干流体的喷射引入。
4、根据权利要求3的方法，特点在于所说的流体选自氮气和氩气。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9611120A FR2753205B1 (fr) | 1996-09-12 | 1996-09-12 | Procede pour realiser un laitier moussant au-dessus d'un acier inoxydable en fusion dans un four electrique |
| FR9611120 | 1996-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180751A CN1180751A (zh) | 1998-05-06 |
| CN1067110C true CN1067110C (zh) | 2001-06-13 |
Family
ID=9495675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97118425A Expired - Fee Related CN1067110C (zh) | 1996-09-12 | 1997-09-11 | 在电炉内熔炼的不锈钢上产生发泡炉渣的方法 |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US6228137B1 (zh) |
| EP (1) | EP0829545B1 (zh) |
| JP (1) | JPH1088223A (zh) |
| KR (1) | KR100262876B1 (zh) |
| CN (1) | CN1067110C (zh) |
| AT (1) | ATE203280T1 (zh) |
| AU (1) | AU719924B2 (zh) |
| BR (1) | BR9704689A (zh) |
| CA (1) | CA2210505A1 (zh) |
| DE (1) | DE69705685T2 (zh) |
| ES (1) | ES2158468T3 (zh) |
| FR (1) | FR2753205B1 (zh) |
| ID (1) | ID19645A (zh) |
| TW (1) | TW357195B (zh) |
| ZA (1) | ZA978124B (zh) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2780070B1 (fr) * | 1998-06-22 | 2001-06-08 | Elf Antar France | Procede de moussage d'un laitier recouvrant un bain d'acier en fusion |
| SE512757C2 (sv) * | 1998-09-03 | 2000-05-08 | Uddeholm Technology Ab | Tillsats av dopingmedel vid tillverkning av stål i ljusbågsugn, dopingmedlet samt användning av detta |
| KR100382311B1 (ko) * | 1998-09-28 | 2003-07-22 | 주식회사 포스코 | 분체탄소취입에의한스테인레스강슬래그중의유가금속회수방법 |
| KR100404281B1 (ko) * | 1999-08-12 | 2003-11-03 | 주식회사 포스코 | 스테인레스 제강 슬래그의 포밍방법 |
| NO311226B1 (no) * | 1999-10-18 | 2001-10-29 | Norsk Hydro As | Skumming av slagg |
| SE517296C2 (sv) * | 2000-02-17 | 2002-05-21 | Uddeholm Technology Ab | Sätt vid tillverkning av stål i ljusbågsugn under användande av granulerat tackjärn |
| SE0201453D0 (sv) * | 2002-05-10 | 2002-05-10 | Luossavaara Kiirunavaara Ab | Method to improve iron production rate in a blast furnace |
| DE10323505A1 (de) | 2003-05-24 | 2004-12-09 | Sms Demag Ag | Verfahren zur Erzeugung einer Schaumschlacke auf hochchromhaltigen Schmelzen in einem Elektroofen |
| NZ554303A (en) * | 2004-09-03 | 2010-08-27 | Newsouth Innovations Pty Ltd | Production of ferro-alloys with charge of un-agglomerated polymer |
| DE102006004532B4 (de) * | 2006-02-01 | 2014-10-09 | Sms Siemag Aktiengesellschaft | Verfahren zur Erzeugung einer Schaumschlacke in einer metallischen Schmelze |
| DE102007006529A1 (de) * | 2007-02-09 | 2008-08-14 | Sms Demag Ag | Verfahren und Reduktion einer hochchromhaltigen Schlacke in einem Elektrolichtbogenofen |
| DE102007050478A1 (de) | 2007-10-23 | 2009-04-30 | Sms Demag Ag | Verfahren zur Rostfreistahlerzeugung mit Direktreduktionsöfen für Ferrochrom und Ferronickel auf der Primärseite eines Konverters |
| DE102008028011A1 (de) | 2008-06-09 | 2009-12-10 | Sms Siemag Aktiengesellschaft | Verfahren zur Erzeugung einer Schaumschlacke auf austenitischen Rostfreischmelzen in einem Elektrolichtbogenofen |
| DE102008032975A1 (de) * | 2008-07-07 | 2010-01-14 | Sms Siemag Aktiengesellschaft | Verfahren zur Erzeugung von Schaumschlacke |
| DE102009020494A1 (de) | 2009-05-08 | 2010-11-11 | Sms Siemag Ag | Verfahren zum Schlackeschäumen einer Nichtrostfrei-Stahlschmelze in einem Elektrolichtbogenofen |
| DE102010004983A1 (de) * | 2010-01-19 | 2011-07-21 | SMS Siemag Aktiengesellschaft, 40237 | Verfahren zur Schaumschlackenerzeugung einer Rostfreischmelze in einem Konverter |
| CN102162020B (zh) * | 2010-02-23 | 2013-05-15 | 宝山钢铁股份有限公司 | 一种电炉冶炼不锈钢用发泡剂及其使用方法 |
| DE102010022692A1 (de) | 2010-03-17 | 2011-09-22 | Sms Siemag Ag | Brikett zur Erzeugung eines Schaumschlacke-Effekts bei der EAF-Technologie der Edelstahlherstellung |
| EP2695953B1 (en) * | 2011-03-31 | 2019-08-14 | Hitachi Metals, Ltd. | Method for adding zinc to molten steel and process for producing zinc-containing steel |
| JP6322065B2 (ja) * | 2014-06-23 | 2018-05-09 | 日本冶金工業株式会社 | ステンレス鋼の製造方法 |
| JP6620781B2 (ja) * | 2017-05-15 | 2019-12-18 | Ｊｆｅスチール株式会社 | ダストの溶融還元方法及び再利用方法 |
| KR102249920B1 (ko) | 2018-09-27 | 2021-05-07 | 주식회사 포스코 | 방향성 전기강판 및 그의 제조방법 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4528035A (en) * | 1984-05-21 | 1985-07-09 | Metro Materials Corporation | Composition and process to create foaming slag cover for molten steel |
| US5395420A (en) * | 1993-11-30 | 1995-03-07 | Centro Sviluppo Materiali S.P.A. | Process for using foamed slag in stainless steel production |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US655508A (en) * | 1898-06-30 | 1900-08-07 | Micheal Mcnalley | Bit. |
| JPS531618A (en) * | 1976-06-28 | 1978-01-09 | Nisshin Steel Co Ltd | Sedative for slag bubbling and converter process using same |
| US4913732A (en) * | 1988-05-19 | 1990-04-03 | Nkk Corporation | Method for smelting reduction in electric furnace |
| DE3931392A1 (de) * | 1989-09-20 | 1991-03-28 | Fuchs Systemtechnik Gmbh | Verfahren und vorrichtung zum zumindest zeitweise gleichzeitigen beaufschlagen einer metallschmelze mit einem gas und feinkoernigen feststoffen |
| DE4211164C2 (de) * | 1992-03-31 | 1995-02-16 | Mannesmann Ag | Verfahren und Vorrichtung zum Behandeln von riesel- oder fließfähigem Material |
| DE4303751C1 (de) * | 1993-02-09 | 1994-09-08 | Intracon Sarl | Verfahren zur Wiederverwertung von Filterstäuben |
| BE1007960A6 (fr) * | 1994-01-13 | 1995-11-28 | Centre Rech Metallurgique | Procede d'elaboration d'acier dans un four a arc. |
-
1996
- 1996-09-12 FR FR9611120A patent/FR2753205B1/fr not_active Expired - Fee Related
-
1997
- 1997-08-19 AU AU34247/97A patent/AU719924B2/en not_active Ceased
- 1997-08-20 TW TW086111897A patent/TW357195B/zh active
- 1997-08-21 AT AT97401961T patent/ATE203280T1/de not_active IP Right Cessation
- 1997-08-21 DE DE69705685T patent/DE69705685T2/de not_active Expired - Fee Related
- 1997-08-21 EP EP97401961A patent/EP0829545B1/fr not_active Revoked
- 1997-08-21 ES ES97401961T patent/ES2158468T3/es not_active Expired - Lifetime
- 1997-08-25 CA CA002210505A patent/CA2210505A1/fr not_active Abandoned
- 1997-08-29 KR KR1019970043184A patent/KR100262876B1/ko not_active Expired - Fee Related
- 1997-09-03 ID IDP973070A patent/ID19645A/id unknown
- 1997-09-09 JP JP9260899A patent/JPH1088223A/ja not_active Abandoned
- 1997-09-10 ZA ZA9708124A patent/ZA978124B/xx unknown
- 1997-09-11 CN CN97118425A patent/CN1067110C/zh not_active Expired - Fee Related
- 1997-09-11 BR BR9704689A patent/BR9704689A/pt not_active IP Right Cessation
- 1997-09-12 US US08/928,500 patent/US6228137B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4528035A (en) * | 1984-05-21 | 1985-07-09 | Metro Materials Corporation | Composition and process to create foaming slag cover for molten steel |
| US5395420A (en) * | 1993-11-30 | 1995-03-07 | Centro Sviluppo Materiali S.P.A. | Process for using foamed slag in stainless steel production |
Also Published As
| Publication number | Publication date |
|---|---|
| ID19645A (id) | 1998-07-23 |
| ES2158468T3 (es) | 2001-09-01 |
| EP0829545B1 (fr) | 2001-07-18 |
| FR2753205A1 (fr) | 1998-03-13 |
| CN1180751A (zh) | 1998-05-06 |
| FR2753205B1 (fr) | 1998-12-04 |
| CA2210505A1 (fr) | 1998-03-12 |
| ATE203280T1 (de) | 2001-08-15 |
| US6228137B1 (en) | 2001-05-08 |
| JPH1088223A (ja) | 1998-04-07 |
| DE69705685D1 (de) | 2001-08-23 |
| EP0829545A1 (fr) | 1998-03-18 |
| AU3424797A (en) | 1998-03-19 |
| ZA978124B (en) | 1998-03-03 |
| TW357195B (en) | 1999-05-01 |
| AU719924B2 (en) | 2000-05-18 |
| DE69705685T2 (de) | 2001-11-22 |
| KR19980024214A (ko) | 1998-07-06 |
| MX9706898A (es) | 1998-07-31 |
| KR100262876B1 (ko) | 2000-08-01 |
| BR9704689A (pt) | 1998-12-29 |
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