EP0042033A1 - Agent de désulfuration - Google Patents

Agent de désulfuration Download PDF

Info

Publication number: EP0042033A1
Authority: EP; European Patent Office
Prior art keywords: diamide lime; diamide; lime; calcium carbide; desulfurization
Prior art date: 1980-06-18
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

EP81101764A

Other languages

German (de)

English (en)

Other versions

EP0042033B1 (fr

Inventor

Alfred Dr. Freissmuth

Werner Dr. Gmöhling

Walter Meichsner

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.)

Evonik Operations GmbH

Original Assignee

SKW Trostberg AG

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.)

1980-06-18

Filing date

1981-03-10

Publication date

1981-12-23

1981-03-10 Application filed by SKW Trostberg AG filed Critical SKW Trostberg AG

1981-03-10 Priority to AT81101764T priority Critical patent/ATE13694T1/de

1981-12-23 Publication of EP0042033A1 publication Critical patent/EP0042033A1/fr

1985-06-05 Application granted granted Critical

1985-06-05 Publication of EP0042033B1 publication Critical patent/EP0042033B1/fr

Status Expired legal-status Critical Current

Links

235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 46
OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims abstract description 46
235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 46
239000004571 lime Substances 0.000 claims abstract description 46
239000003795 chemical substances by application Substances 0.000 claims abstract description 29
239000005997 Calcium carbide Substances 0.000 claims abstract description 22
CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims abstract description 22
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
229910052799 carbon Inorganic materials 0.000 claims abstract description 16
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
238000005188 flotation Methods 0.000 claims abstract description 5
229910052742 iron Inorganic materials 0.000 claims abstract description 5
239000000203 mixture Substances 0.000 claims description 29
238000006477 desulfuration reaction Methods 0.000 claims description 18
230000023556 desulfurization Effects 0.000 claims description 18
230000003009 desulfurizing effect Effects 0.000 claims description 14
229910000805 Pig iron Inorganic materials 0.000 claims description 8
239000000155 melt Substances 0.000 abstract description 4
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 16
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
229910000019 calcium carbonate Inorganic materials 0.000 description 8
239000002245 particle Substances 0.000 description 8
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
239000000377 silicon dioxide Substances 0.000 description 5
235000012239 silicon dioxide Nutrition 0.000 description 5
230000000694 effects Effects 0.000 description 4
239000012535 impurity Substances 0.000 description 4
TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
229910052717 sulfur Inorganic materials 0.000 description 4
239000011593 sulfur Substances 0.000 description 4
239000000654 additive Substances 0.000 description 3
AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
239000000920 calcium hydroxide Substances 0.000 description 3
229910001861 calcium hydroxide Inorganic materials 0.000 description 3
BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
239000000292 calcium oxide Substances 0.000 description 3
ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
239000001569 carbon dioxide Substances 0.000 description 3
229910002092 carbon dioxide Inorganic materials 0.000 description 3
239000003245 coal Substances 0.000 description 3
239000010439 graphite Substances 0.000 description 3
229910002804 graphite Inorganic materials 0.000 description 3
238000007792 addition Methods 0.000 description 2
239000007788 liquid Substances 0.000 description 2
238000000034 method Methods 0.000 description 2
MVXMNHYVCLMLDD-UHFFFAOYSA-N 4-methoxynaphthalene-1-carbaldehyde Chemical compound C1=CC=C2C(OC)=CC=C(C=O)C2=C1 MVXMNHYVCLMLDD-UHFFFAOYSA-N 0.000 description 1
OYPRJOBELJOOCE-IGMARMGPSA-N Calcium-40 Chemical compound [40Ca] OYPRJOBELJOOCE-IGMARMGPSA-N 0.000 description 1
OYPRJOBELJOOCE-BKFZFHPZSA-N Calcium-45 Chemical compound [45Ca] OYPRJOBELJOOCE-BKFZFHPZSA-N 0.000 description 1
229910001018 Cast iron Inorganic materials 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
239000013543 active substance Substances 0.000 description 1
RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
239000003830 anthracite Substances 0.000 description 1
238000007664 blowing Methods 0.000 description 1
239000002008 calcined petroleum coke Substances 0.000 description 1
QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
239000000428 dust Substances 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000002006 petroleum coke Substances 0.000 description 1
-1 pig iron Chemical compound 0.000 description 1
238000012216 screening Methods 0.000 description 1
239000002893 slag Substances 0.000 description 1
239000010959 steel Substances 0.000 description 1
239000000161 steel melt Substances 0.000 description 1
239000000725 suspension Substances 0.000 description 1
239000002699 waste material 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising

Definitions

this object is achieved by a desulfurization agent based on calcium carbide and.
Diamide lime characterized in that it contains a diamide lime aftertreated by flotation or wind sifting.
Diamide lime is essentially a mixture of calcium carbonate and carbon. Such mixtures occur, for example, in the case of dicyandiamide products, in the course of which aqueous calcium cyanamide suspensions are treated with carbon dioxide, and then contain about 70 to 85% calcium carbonate and about 8 to 12% carbon in addition to impurities, in particular iron oxide, aluminum oxide and silicon dioxide.
the precipitated diamide lime is either subjected to flotation or else first dried and then subjected to an air screening process.
the flotation and the wind sifting can be carried out in a known manner and with the usual equipment (see, for example, Ullmann's Encyklo ubendie der Technischen Chemie, Verlag Chemie, Weinheim, 4th edition, volume 2, pages 110 to 142 and 57 to 69).
the post-treated diamide lime contains about 17 to 36% CO 2 corresponding to 38 to 82% calcium carbonate, 18 to 55% free carbon and about 5 to 10% residual impurities such as calcium oxide, calcium hydroxide, iron oxide, aluminum oxide and silicon dioxide .
a post-treated diamide lime can also be mixed with an untreated diamide lime, for example in a weight ratio of 50/50, and this "waste" can be used to produce the mixture according to the invention.
a diamide lime with 18 to 40%, in particular 25 to 30%, free carbon is preferably used.
Such diamide lime has, for example, the following analytical values: 25 to 30% free carbon, 28 to 30% CO 2 corresponding to 64 to 68% calcium carbonate, and 5 to 10% calcium oxide, calcium hydroxide and impurities such as iron oxide, aluminum oxide and silicon dioxide.
the aftertreatment enriches in particular the carbon content, the calcium carbonate particles adhering to the carbon and the very fine content of the diamide lime. While the untreated diamide lime has an average particle size of approx. 35 ⁇ m, where 10%> approx. 75 ⁇ m and 10% ⁇ approx. 10 ⁇ m, these data have been shifted to significantly smaller particle sizes for the after-treated diamide lime: the average particle size of an after-treated diamide lime with about 40% carbon is only 5 ⁇ m, with 10% above about 15 ⁇ m and 10% below about 2 ⁇ m. Depending on the intensity of the after-treatment, these values can be shifted up or down.
the desulfurization mixtures according to the invention are prepared by combining calcium carbide with the dried post-treated diamide lime together in a mill, e.g. in a tube mill, ground.
the grinding process in particular the duration of the grinding, is of course of great importance for the production of a mixture which is optimal with regard to flowability and desulfurization.
the minimum grinding time is usually about 5 minutes, and the time required to achieve optimal results is usually between 10 and 30 minutes.
the mixture according to the invention can also contain other conventional additives, such as e.g. finely divided silicon dioxide to further improve the flowability, or else additions of carbon, e.g. in the form of fatty, hard or flame coal, anthracite, and in particular in the form of graphite.
additives such as e.g. finely divided silicon dioxide to further improve the flowability, or else additions of carbon, e.g. in the form of fatty, hard or flame coal, anthracite, and in particular in the form of graphite.
the application therefore also relates to the use of the agents according to the invention for the desulfurization of molten iron, such as pig iron, cast iron and steel melts.
the post-treated diamide lime used in mixture 4) has the following analysis values: 25% free carbon, 30% CO 2 corresponding to 68% calcium carbonate and 7% calcium oxide, calcium hydroxide and impurities such as iron oxide, aluminum oxide and silicon dioxide. Average particle size 15 ⁇ m, 10%> 35 ⁇ m, 10% ⁇ 5 ⁇ m.,

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (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)
Treating Waste Gases (AREA)
Processing Of Solid Wastes (AREA)
Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Filtering Of Dispersed Particles In Gases (AREA)
Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Treatment Of Steel In Its Molten State (AREA)

EP81101764A 1980-06-18 1981-03-10 Agent de désulfuration Expired EP0042033B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT81101764T ATE13694T1 (de)	1980-06-18	1981-03-10	Entschwefelungsmittel.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19803022752 DE3022752A1 (de)	1980-06-18	1980-06-18	Entschwefelungsmittel
DE3022752		1980-06-18

Publications (2)

Publication Number	Publication Date
EP0042033A1 true EP0042033A1 (fr)	1981-12-23
EP0042033B1 EP0042033B1 (fr)	1985-06-05

Family

ID=6104856

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP81101764A Expired EP0042033B1 (fr)	1980-06-18	1981-03-10	Agent de désulfuration

Country Status (7)

Country	Link
US (1)	US4430118A (fr)
EP (1)	EP0042033B1 (fr)
JP (1)	JPS5726116A (fr)
AT (1)	ATE13694T1 (fr)
CA (1)	CA1161650A (fr)
DE (2)	DE3022752A1 (fr)
ES (1)	ES501368A0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0226994A1 (fr) *	1985-12-17	1987-07-01	SKW Trostberg Aktiengesellschaft	Agent de désulfuration d'une fonte liquide ainsi que procédé de fabrication
EP0279894A1 (fr) *	1987-02-13	1988-08-31	Cyanamid Canada Inc.	Méthode de désulfuration du fer
EP0110508B1 (fr) *	1982-09-22	1988-11-09	Kawasaki Steel Corporation	Procédé pour la désulfuration de la fonte en fusion par injection

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS58204119A (ja) *	1982-05-25	1983-11-28	Nippon Carbide Ind Co Ltd	融鉄の脱硫剤
JPS6169911A (ja) *	1985-09-06	1986-04-10	Kawasaki Steel Corp	融鉄の脱硫剤及びその製法
US5002733A (en) *	1989-07-26	1991-03-26	American Alloys, Inc.	Silicon alloys containing calcium and method of making same
JPH0731691Y2 (ja) *	1992-03-16	1995-07-26	俊雄今中	ワッペン
DE19724913A1 (de) *	1997-06-12	1998-12-17	Almamet Gmbh	Mittel zur fluorfreien Behandlung von Stahlschmelzen in der Gießpfanne, Verfahren zu seiner Herstellung und seine Verwendung
JP4133318B2 (ja) *	2000-06-14	2008-08-13	Ｊｆｅミネラル株式会社	再生脱硫剤の製造方法及び低硫溶銑の製造方法
US6989040B2 (en) *	2002-10-30	2006-01-24	Gerald Zebrowski	Reclaimed magnesium desulfurization agent

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1758250B1 (de) *	1968-04-29	1971-10-28	Sueddeutsche Kalkstickstoff	Mittel zum Entschwefeln von Eisenschmelzen
DE2741588A1 (de) *	1977-09-15	1979-03-29	Sueddeutsche Kalkstickstoff	Mittel zum entschwefeln von eisenschmelzen
DE2835872A1 (de) *	1978-08-16	1980-02-28	Sueddeutsche Kalkstickstoff	Verfahren zur verminderung der staubund flammenbelaestigung bei der handhabung der schlacken nach der roheisenentschwefelung und hierfuer geeignetes entschwefelungsgemisch
FR2432550A1 (fr) *	1978-08-04	1980-02-29	Sueddeutsche Kalkstickstoff	Procede pour la fabrication d'un melange de desulfuration pulverulent facilement fluidifiable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS56163213A (en)	1980-05-20	1981-12-15	Nippon Carbide Ind Co Ltd	Desulfurizer powder composition for molten iron

1980
- 1980-06-18 DE DE19803022752 patent/DE3022752A1/de not_active Withdrawn
1981
- 1981-02-24 CA CA000371639A patent/CA1161650A/fr not_active Expired
- 1981-03-10 EP EP81101764A patent/EP0042033B1/fr not_active Expired
- 1981-03-10 DE DE8181101764T patent/DE3170808D1/de not_active Expired
- 1981-03-10 AT AT81101764T patent/ATE13694T1/de not_active IP Right Cessation
- 1981-04-14 ES ES501368A patent/ES501368A0/es active Granted
- 1981-06-10 JP JP8833081A patent/JPS5726116A/ja active Pending
1982
- 1982-09-29 US US06/427,110 patent/US4430118A/en not_active Expired - Fee Related

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1758250B1 (de) *	1968-04-29	1971-10-28	Sueddeutsche Kalkstickstoff	Mittel zum Entschwefeln von Eisenschmelzen
DE2741588A1 (de) *	1977-09-15	1979-03-29	Sueddeutsche Kalkstickstoff	Mittel zum entschwefeln von eisenschmelzen
FR2432550A1 (fr) *	1978-08-04	1980-02-29	Sueddeutsche Kalkstickstoff	Procede pour la fabrication d'un melange de desulfuration pulverulent facilement fluidifiable
DE2835872A1 (de) *	1978-08-16	1980-02-28	Sueddeutsche Kalkstickstoff	Verfahren zur verminderung der staubund flammenbelaestigung bei der handhabung der schlacken nach der roheisenentschwefelung und hierfuer geeignetes entschwefelungsgemisch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0110508B1 (fr) *	1982-09-22	1988-11-09	Kawasaki Steel Corporation	Procédé pour la désulfuration de la fonte en fusion par injection
EP0226994A1 (fr) *	1985-12-17	1987-07-01	SKW Trostberg Aktiengesellschaft	Agent de désulfuration d'une fonte liquide ainsi que procédé de fabrication
EP0279894A1 (fr) *	1987-02-13	1988-08-31	Cyanamid Canada Inc.	Méthode de désulfuration du fer

Also Published As

Publication number	Publication date
DE3022752A1 (de)	1982-01-14
JPS5726116A (en)	1982-02-12
ES8305047A1 (es)	1983-04-01
EP0042033B1 (fr)	1985-06-05
US4430118A (en)	1984-02-07
ES501368A0 (es)	1983-04-01
DE3170808D1 (de)	1985-07-11
CA1161650A (fr)	1984-02-07
ATE13694T1 (de)	1985-06-15

Legal Events

Date	Code	Title	Description
1981-10-23	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
1981-12-23	AK	Designated contracting states	Designated state(s): AT BE DE FR GB LU NL SE
1982-06-09	17P	Request for examination filed	Effective date: 19820324
1985-04-05	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1985-06-05	AK	Designated contracting states	Designated state(s): AT BE DE FR GB LU NL SE
1985-06-05	REF	Corresponds to:	Ref document number: 13694 Country of ref document: AT Date of ref document: 19850615 Kind code of ref document: T
1985-07-11	REF	Corresponds to:	Ref document number: 3170808 Country of ref document: DE Date of ref document: 19850711
1985-09-20	ET	Fr: translation filed
1986-03-10	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: AT Effective date: 19860310
1986-03-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19860331 Ref country code: BE Effective date: 19860331
1986-05-12	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1986-05-12	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1986-07-02	26N	No opposition filed
1986-09-30	BERE	Be: lapsed	Owner name: SKW TROSTBERG A.G. Effective date: 19860331
1986-10-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19861001
1986-12-16	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee
1988-03-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Effective date: 19880311
1988-11-18	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19881118
1988-11-30	GBPC	Gb: european patent ceased through non-payment of renewal fee
1988-11-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19881130
1988-12-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19881201
1989-01-27	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
1995-01-31	EUG	Se: european patent has lapsed	Ref document number: 81101764.9 Effective date: 19881205

Publication	Publication Date	Title
DE60120156T2 (de)	2006-11-02	Verfahren und vorrichtung zur herstellung von entschwefelungsmitteln für heisse metalle
DE2440205A1 (de)	1975-03-27	Verfahren zur herabsetzung des schwefelgehalts von geschmolzenem eisen
EP0226994A1 (fr)	1987-07-01	Agent de désulfuration d'une fonte liquide ainsi que procédé de fabrication
DE2615699C2 (de)	1985-11-14	Verfahren zum Aufhellen von natürlichem calcitischen Mineral
EP0042033B1 (fr)	1985-06-05	Agent de désulfuration
DE3004973C2 (de)	1987-10-01	Injektions-Entschwefelungsmittel
EP0061012B1 (fr)	1984-09-05	Procédé pour la fabrication d'agents de désulfuration de fonte et d'acier fondus
DE3446609C2 (fr)	1989-03-30
DE3118288C2 (fr)	1992-01-02
DE2716840A1 (de)	1977-10-20	Behandelte basische konverterschlacke und verfahren zur behandlung von basischer konverterschlacke
DE2612500C3 (de)	1978-04-20	Reduktionsmittel für die Stahlherstellung
DE2913207A1 (de)	1979-10-11	Kalkhaltiges mittel zum behandeln von eisenschmelzen
EP0031552B1 (fr)	1984-11-21	Agent de désulfuration et procédé pour sa fabrication
DE2920353A1 (de)	1980-11-27	Verfahren zur herstellung von entschweflungsmitteln fuer roheisen- oder stahlschmelzen
EP0387580A1 (fr)	1990-09-19	Agent et procédé de désulfuration de métaux en fusion
EP0038417A1 (fr)	1981-10-28	Agent de désulfuration
EP0031534B1 (fr)	1984-08-22	Procédé pour la fabrication d'agents de désulfuration de fonte ou d'acier fondus
DE19857733A1 (de)	2000-06-21	Entschwefelungsmittel
DE3544563C2 (de)	1998-07-16	Mittel zur Entschwefelung von geschmolzenem Eisen
DE3544562C2 (de)	1998-07-30	Feinkörniges Mittel zur Entschwefelung von Eisenschmelzen
DE69025981T2 (de)	1996-10-10	Entschwefelungsmittel
DE3101168C2 (de)	1984-07-26	"Verfahren zur Herstellung von Aufkohlungsmitteln mit erhöhter Auflösungsgeschwindigkeit"
DE2236160C3 (de)	1975-10-09	Mittel zur Entschwefelung von flüssigem Roheisen und Verfahren zu seiner Herstellung
DE3733480C1 (de)	1989-01-19	Verfahren zur Verringerung des Kornzerfalls
DE1583268B1 (de)	1971-08-05	Mittel zur Entschwefelung von fluessigem Eisen auf der Basis von technischem Kalkstickstoff und Verfahren zur Entschwefelung von Eisen

EP0042033A1 - Agent de désulfuration - Google Patents

Info

Links

Classifications

Definitions

Landscapes

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6104856

Family Applications (1)

Country Status (7)

Cited By (3)

Families Citing this family (7)

Citations (4)

Family Cites Families (1)

Patent Citations (4)

Cited By (3)

Also Published As

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