EP0723828A1 - Ein Stahlstranggussform deckendes Giesspulver, insbesondere für Stahl mit sehr niedrigem Kohlenstoffgehalt - Google Patents

Ein Stahlstranggussform deckendes Giesspulver, insbesondere für Stahl mit sehr niedrigem Kohlenstoffgehalt Download PDF

Info

Publication number: EP0723828A1
Authority: EP; European Patent Office
Prior art keywords: powder; nitride; free; steel; carbon
Prior art date: 1995-01-27
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.): Granted

Application number

EP96400191A

Other languages

English (en)

French (fr)

Other versions

EP0723828B1 (de

Inventor

Bernard Debiesme

Jean-Paul Radot

Denis Coulombet

Claude Lefebvre

Yves Roux

Corinne Damerval

Jean-Noel Pontoire

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Sollac SA

Denain Anzin Metallurgie DAMet SAS

Original Assignee

DENAIN-ANZIN MINERAUX

Denain Anzin Mineraux Refractaire Ceramique DAMREC SA

Sollac SA

Lorraine de Laminage Continu SA SOLLAC

Priority date (The priority date 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 date listed.)

1995-01-27

Filing date

1996-01-26

Publication date

1996-07-31

1996-01-26 Application filed by DENAIN-ANZIN MINERAUX, Denain Anzin Mineraux Refractaire Ceramique DAMREC SA, Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical DENAIN-ANZIN MINERAUX

1996-07-31 Publication of EP0723828A1 publication Critical patent/EP0723828A1/de

2000-05-24 Application granted granted Critical

2000-05-24 Publication of EP0723828B1 publication Critical patent/EP0723828B1/de

2016-01-26 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

239000000843 powder Substances 0.000 title claims abstract description 64
229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
239000010959 steel Substances 0.000 title claims abstract description 14
238000009749 continuous casting Methods 0.000 title claims description 5
229910000975 Carbon steel Inorganic materials 0.000 title description 3
150000004767 nitrides Chemical class 0.000 claims abstract description 25
238000000889 atomisation Methods 0.000 claims abstract description 8
239000008187 granular material Substances 0.000 claims abstract description 8
229910052710 silicon Inorganic materials 0.000 claims abstract description 8
229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
229910052804 chromium Inorganic materials 0.000 claims abstract description 4
229910052742 iron Inorganic materials 0.000 claims abstract description 4
229910052726 zirconium Inorganic materials 0.000 claims abstract description 4
229910052796 boron Inorganic materials 0.000 claims abstract description 3
229910052719 titanium Inorganic materials 0.000 claims abstract description 3
229910052799 carbon Inorganic materials 0.000 claims description 30
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
239000002245 particle Substances 0.000 claims description 11
229910052581 Si3N4 Inorganic materials 0.000 claims description 8
HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
239000011651 chromium Substances 0.000 claims description 4
239000010703 silicon Substances 0.000 claims description 4
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
-1 chromium nitrides Chemical class 0.000 claims description 2
239000010936 titanium Substances 0.000 claims description 2
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
239000000314 lubricant Substances 0.000 abstract description 2
229910052748 manganese Inorganic materials 0.000 abstract description 2
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
229910052751 metal Inorganic materials 0.000 description 7
238000007792 addition Methods 0.000 description 6
238000002844 melting Methods 0.000 description 6
230000008018 melting Effects 0.000 description 6
239000002184 metal Substances 0.000 description 6
239000000203 mixture Substances 0.000 description 6
239000007788 liquid Substances 0.000 description 5
CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
229910052757 nitrogen Inorganic materials 0.000 description 4
238000005266 casting Methods 0.000 description 3
150000001875 compounds Chemical class 0.000 description 3
229910001338 liquidmetal Inorganic materials 0.000 description 3
238000000034 method Methods 0.000 description 3
229910052582 BN Inorganic materials 0.000 description 2
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
239000000654 additive Substances 0.000 description 2
150000004649 carbonic acid derivatives Chemical class 0.000 description 2
239000000470 constituent Substances 0.000 description 2
238000009826 distribution Methods 0.000 description 2
239000010419 fine particle Substances 0.000 description 2
230000004927 fusion Effects 0.000 description 2
230000001050 lubricating effect Effects 0.000 description 2
239000000395 magnesium oxide Substances 0.000 description 2
239000000463 material Substances 0.000 description 2
238000011084 recovery Methods 0.000 description 2
239000000779 smoke Substances 0.000 description 2
229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
235000008733 Citrus aurantifolia Nutrition 0.000 description 1
229910001208 Crucible steel Inorganic materials 0.000 description 1
229910004298 SiO 2 Inorganic materials 0.000 description 1
235000011941 Tilia x europaea Nutrition 0.000 description 1
BLOIXGFLXPCOGW-UHFFFAOYSA-N [Ti].[Sn] Chemical compound [Ti].[Sn] BLOIXGFLXPCOGW-UHFFFAOYSA-N 0.000 description 1
239000002671 adjuvant Substances 0.000 description 1
230000002411 adverse Effects 0.000 description 1
239000003570 air Substances 0.000 description 1
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
239000012080 ambient air Substances 0.000 description 1
229910052791 calcium Inorganic materials 0.000 description 1
239000011575 calcium Substances 0.000 description 1
150000001721 carbon Chemical class 0.000 description 1
239000003638 chemical reducing agent Substances 0.000 description 1
230000000295 complement effect Effects 0.000 description 1
238000001816 cooling Methods 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
230000007812 deficiency Effects 0.000 description 1
239000006185 dispersion Substances 0.000 description 1
238000007580 dry-mixing Methods 0.000 description 1
238000000605 extraction Methods 0.000 description 1
238000001125 extrusion Methods 0.000 description 1
230000002349 favourable effect Effects 0.000 description 1
239000010436 fluorite Substances 0.000 description 1
239000010439 graphite Substances 0.000 description 1
229910002804 graphite Inorganic materials 0.000 description 1
238000000227 grinding Methods 0.000 description 1
238000009434 installation Methods 0.000 description 1
239000004571 lime Substances 0.000 description 1
238000005461 lubrication Methods 0.000 description 1
238000012423 maintenance Methods 0.000 description 1
239000011572 manganese Substances 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000003595 mist Substances 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
238000005453 pelletization Methods 0.000 description 1
230000005855 radiation Effects 0.000 description 1
239000002994 raw material Substances 0.000 description 1
238000010405 reoxidation reaction Methods 0.000 description 1
239000000377 silicon dioxide Substances 0.000 description 1
239000002893 slag Substances 0.000 description 1
239000011734 sodium Substances 0.000 description 1
KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
229910001948 sodium oxide Inorganic materials 0.000 description 1
238000007711 solidification Methods 0.000 description 1
230000008023 solidification Effects 0.000 description 1
238000005507 spraying Methods 0.000 description 1
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
238000005303 weighing Methods 0.000 description 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal

Definitions

the invention relates to the continuous casting of steel. More specifically, it relates to the field of slag or covering powders which are deposited on the surface of the liquid steel present in the continuous casting ingot mold, with the aim of preventing reoxidation by ambient air and cooling. by radiation of the metal, to capture the non-metallic inclusions which have settled, and to ensure the lubrication of the walls of the ingot mold during the extraction of the cast product.
these covering powders are composed of a base powder comprising in particular oxides such as silica, lime, alumina, magnesia, and various additives. Among these, mention may be made of sodium oxide, fluorspar, carbonates, etc. They are deposited on the surface of the liquid steel in the mold to form a layer a few cm thick. In the vicinity of the powder-metal interface, the powder becomes liquid, which allows it to infiltrate between the wall of the mold and the skin during solidification of the cast product, and thus play its role as a lubricant. As the powder is consumed, it is renewed manually or using automatic devices, such as that described in the document FR2635029.
the powder does not have a too fine particle size, in order to limit the risks of clogging of the pipes which bring it into the mold.
powders are used, the particles of which consist of hollow spheres of relatively coarse average particle size (greater than 100 ⁇ m) produced by atomization. Even if, strictly speaking, these materials can no longer be entirely described as pulverulent, they will also be designated in the remainder of the text by the term "powder", as practitioners usually do.
free carbon is mixed with its constituents, for example in the form of graphite or smoke black.
the contents of free carbon are generally of the order of a few% by weight. It is found that part of this carbon passes from the powder into the liquid metal, which therefore sees its carbon content increase. In the most common cases, this increase is not a problem for the quality of the cast product.
ultra-low carbon steels that is to say less than 50 ppm, or even less.
nitride content is between 2 and 10% by weight of the powder. This content must therefore be relatively high for such a carbon-free powder to find properties equivalent to those of the usual carbonaceous powders. But the presence of nitride in large quantities may cause a significant uptake of nitrogen by the cast steel.
the object of the invention is to provide steelmakers, in particular those who pour steels with ultra-low carbon and possibly nitrogen content, covering powders which do not cause re-carburations and unhealthy renitrurations of the metal, while preserving satisfactory lubricating properties and a reasonable cost.
the subject of the invention is a powder for covering a mold for the continuous casting of steel, in particular ultra-low carbon steel, of the type comprising a base powder and particles of at least a metal nitride, characterized in that its free carbon content (% C free ) is between 0 and 1% by weight, in that it is produced by atomization, and in that it is in the form of granules diameter between 20 and 800 ⁇ m.
the invention consists in using as a compound ensuring the regulation of the melting speed of the powder, no longer carbon alone or a nitride alone at high contents, but a mixture of carbon and one or several metallic nitrides, in particular silicon nitride, or possibly one or more nitrides, but always with relatively low contents. This is made possible by the fact that the powder is produced by an atomization process.
One of the essential conditions for a covering powder to be able to play its role satisfactorily is that the particles which ensure the regulation of its melting speed are distributed therein in a homogeneous manner.
the inventors have found that with the powders according to the prior art containing nitrides and free of carbon, manufactured by conventional processes, such as compacting, pelletizing, grinding, extrusion, and which have a relatively fine particle size (300 ⁇ m maximum and generally 45 ⁇ m on average), this homogeneity could not be guaranteed. It was then necessary to compensate for its deficiencies by adding more nitrides than would have been necessary in theory. We were thus sure that any fraction of the powder would have a sufficient nitride content to give it an at least acceptable melting speed.
the principle of this process, applied to the powders according to the invention is as follows. We first carry out a weighing and dry mixing of the main raw materials of the powder. Then the mixture is introduced into a dispersion tank with a certain percentage of water and atomizing additives to form a pulp called slip. The nitrides, and optionally the free carbon entering into the composition of the powder according to the invention are added during this step, together with the atomization adjuvants. This slip is introduced into a transfer tank, then pulverized in an atomization tower. by a high pressure pump. The mist thus obtained is dried in a stream of air at 600 ° C, and the sprayed droplets become granules, around which the particles of carbon and nitride are distributed homogeneously.
the average diameter of the granules must preferably be of the order of 300 to 500 ⁇ m, and the powder intended to be added to the ingot mold will only be used for the granules whose diameter is between 20 and 800 ⁇ m.
Another advantage of this spraying is that the granules are, due to their size, perfectly suitable for being added to the ingot mold by means of automatic devices.
the metal nitrides which can be used alone or as a mixture in the powders according to the invention are essentially the boron nitrides BN, silicon Si 3 N 4 , aluminum AlN, titanium TiN, manganese MnN, zirconium ZrN, iron Fe 4 N, of chromium Cr 2 N. It appears however that, among these compounds, it is silicon nitride which generally has the most favorable properties in terms of cost and performance. In particular, the passage of its metallic element in liquid steel during the decomposition of the powder has, in the majority of use cases, only an insignificant metallurgical influence, which would not always be the case, for example, for boron nitride.
the particles of silicon nitride added to the other components of the powder preferably have an average diameter less than or equal to 5 ⁇ m and a specific surface of 2.5 to 3.5 g / m 2 .
these covering powders according to the invention is in no way limited to the casting of steels with ultra-low carbon content: they can be used for the casting of other types of steels.
other components intended to fulfill particular functions such as reducing agents (aluminum, silico-calcium, etc.), in the since their presence does not adversely affect the lubricating capacities of the powder.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Continuous Casting (AREA)
Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Powder Metallurgy (AREA)
Treatment Of Steel In Its Molten State (AREA)
Paper (AREA)
Mold Materials And Core Materials (AREA)

EP96400191A 1995-01-27 1996-01-26 Ein Stahlstranggussform deckendes Giesspulver, insbesondere für Stahl mit sehr niedrigem Kohlenstoffgehalt Expired - Lifetime EP0723828B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9500915A FR2729875A1 (fr)	1995-01-27	1995-01-27	Poudre de couverture de lingotiere de coulee continue de l'acier, notamment d'aciers a tres basse teneur en carbone
FR9500915		1995-01-27

Publications (2)

Publication Number	Publication Date
EP0723828A1 true EP0723828A1 (de)	1996-07-31
EP0723828B1 EP0723828B1 (de)	2000-05-24

Family

ID=9475537

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP96400191A Expired - Lifetime EP0723828B1 (de)	1995-01-27	1996-01-26	Ein Stahlstranggussform deckendes Giesspulver, insbesondere für Stahl mit sehr niedrigem Kohlenstoffgehalt

Country Status (11)

Country	Link
US (2)	US5876482A (de)
EP (1)	EP0723828B1 (de)
JP (1)	JPH09510923A (de)
KR (1)	KR100349589B1 (de)
AT (1)	ATE193234T1 (de)
CA (1)	CA2186447A1 (de)
DE (1)	DE69608473T2 (de)
ES (1)	ES2146844T3 (de)
FR (1)	FR2729875A1 (de)
TW (1)	TW295558B (de)
WO (1)	WO1996022850A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1602425A1 (de) *	2004-05-29	2005-12-07	Stefanie Heller	Isolierende Granulate für Metallstranggiessen und deren Herstellungsverfahren
CN103817301A (zh) *	2014-02-27	2014-05-28	西峡龙成冶金材料有限公司	一种用于超低碳钢的连铸结晶器保护渣

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2729875A1 (fr) *	1995-01-27	1996-08-02	Lorraine Laminage	Poudre de couverture de lingotiere de coulee continue de l'acier, notamment d'aciers a tres basse teneur en carbone
ATE345888T1 (de) *	1998-07-21	2006-12-15	Shinagawa Refractories Co	Giesspulver zum stranggiessen von dünnbrammen und stranggiessverfahren
EP3392220A1 (de)	2007-11-29	2018-10-24	Corning Incorporated	Brille mit verbesserter zähigkeit und kratzfestigkeit
EP2407563A1 (de) *	2010-07-13	2012-01-18	Denain Anzin Métallurgie D.A.MET	Abdeckpulver für flüssigen Stahl, und sein Herstellungsverfahren
DE102013106832A1 (de) *	2013-06-28	2014-12-31	S & B Industrial Minerals Gmbh	Verfahren zur Herstellung von Granulaten
JP6398299B2 (ja) *	2014-05-09	2018-10-03	新日鐵住金株式会社	鋼の連続鋳造パウダー及び連続鋳造方法
CN117259702A (zh) *	2023-09-26	2023-12-22	西峡龙成冶金材料有限公司	奥氏体304不锈钢方坯连铸用结晶器保护渣及其应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2314000A1 (fr) *	1975-06-13	1977-01-07	Nippon Steel Corp	Poudre de coulee exempte de carbone pour coulee en lingots et coulee continue
JPS55128526A (en) *	1979-03-29	1980-10-04	Nippon Kokan Kk <Nkk>	Casting mold additive for continuously casting steel
GB2201108A (en) *	1987-02-12	1988-08-24	Shinagawa Refractor Co Ltd	Mould additive for continuous casting of steel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS51147432A (en) *	1975-06-13	1976-12-17	Nippon Steel Corp	Powder additive for making ingot and for continuous casting
FR2729875A1 (fr) *	1995-01-27	1996-08-02	Lorraine Laminage	Poudre de couverture de lingotiere de coulee continue de l'acier, notamment d'aciers a tres basse teneur en carbone

1995
- 1995-01-27 FR FR9500915A patent/FR2729875A1/fr active Granted
1996
- 1996-01-26 ES ES96400191T patent/ES2146844T3/es not_active Expired - Lifetime
- 1996-01-26 EP EP96400191A patent/EP0723828B1/de not_active Expired - Lifetime
- 1996-01-26 CA CA002186447A patent/CA2186447A1/fr not_active Withdrawn
- 1996-01-26 US US08/716,430 patent/US5876482A/en not_active Expired - Fee Related
- 1996-01-26 DE DE69608473T patent/DE69608473T2/de not_active Expired - Fee Related
- 1996-01-26 KR KR1019960705155A patent/KR100349589B1/ko not_active Expired - Fee Related
- 1996-01-26 AT AT96400191T patent/ATE193234T1/de not_active IP Right Cessation
- 1996-01-26 JP JP8522689A patent/JPH09510923A/ja active Pending
- 1996-01-26 WO PCT/FR1996/000134 patent/WO1996022850A1/fr not_active Ceased
- 1996-03-14 TW TW085103059A patent/TW295558B/zh active
1998
- 1998-10-13 US US09/170,090 patent/US6328781B1/en not_active Expired - Fee Related

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2314000A1 (fr) *	1975-06-13	1977-01-07	Nippon Steel Corp	Poudre de coulee exempte de carbone pour coulee en lingots et coulee continue
JPS55128526A (en) *	1979-03-29	1980-10-04	Nippon Kokan Kk <Nkk>	Casting mold additive for continuously casting steel
GB2201108A (en) *	1987-02-12	1988-08-24	Shinagawa Refractor Co Ltd	Mould additive for continuous casting of steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 190 (C - 037) 26 December 1980 (1980-12-26) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1602425A1 (de) *	2004-05-29	2005-12-07	Stefanie Heller	Isolierende Granulate für Metallstranggiessen und deren Herstellungsverfahren
CN103817301A (zh) *	2014-02-27	2014-05-28	西峡龙成冶金材料有限公司	一种用于超低碳钢的连铸结晶器保护渣
CN103817301B (zh) *	2014-02-27	2016-01-27	西峡龙成冶金材料有限公司	一种用于超低碳钢的连铸结晶器保护渣

Also Published As

Publication number	Publication date
US6328781B1 (en)	2001-12-11
US5876482A (en)	1999-03-02
EP0723828B1 (de)	2000-05-24
FR2729875B1 (de)	1997-02-21
JPH09510923A (ja)	1997-11-04
ES2146844T3 (es)	2000-08-16
CA2186447A1 (fr)	1996-08-01
DE69608473T2 (de)	2000-09-28
TW295558B (de)	1997-01-11
ATE193234T1 (de)	2000-06-15
KR970701603A (ko)	1997-04-12
DE69608473D1 (de)	2000-06-29
FR2729875A1 (fr)	1996-08-02
WO1996022850A1 (fr)	1996-08-01
KR100349589B1 (ko)	2002-11-13

Legal Events

Date	Code	Title	Description
1996-06-14	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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2000-04-07	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2000-05-03	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: DENAIN-ANZIN MINERAUX Owner name: SOLLAC
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