EP0343378A1 - Procédé pour l'élaboration, à partir de leurs oxydes, de métaux tels que le titane, le zirconium, le chrome, le samarium ou le néodyme - Google Patents

Procédé pour l'élaboration, à partir de leurs oxydes, de métaux tels que le titane, le zirconium, le chrome, le samarium ou le néodyme Download PDF

Info

Publication number: EP0343378A1
Authority: EP; European Patent Office
Prior art keywords: metal; alkaline earth; melt; earth metal; halide
Prior art date: 1988-05-24
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP89107119A

Other languages

German (de)

English (en)

Inventor

Alok Dr. Choudhury

Gerhard Dr. Brückmann

Harald Scholz

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.)

Balzers und Leybold Deutschland Holding AG

Original Assignee

Leybold 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.)

1988-05-24

Filing date

1989-04-20

Publication date

1989-11-29

1989-04-20 Application filed by Leybold AG filed Critical Leybold AG

1989-11-29 Publication of EP0343378A1 publication Critical patent/EP0343378A1/fr

Status Withdrawn legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 26
229910052719 titanium Inorganic materials 0.000 title claims abstract description 21
230000008569 process Effects 0.000 title claims abstract description 12
229910052779 Neodymium Inorganic materials 0.000 title claims abstract description 4
229910052772 Samarium Inorganic materials 0.000 title claims abstract description 4
229910052804 chromium Inorganic materials 0.000 title claims abstract description 4
229910052726 zirconium Inorganic materials 0.000 title claims description 4
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title abstract description 24
239000010936 titanium Substances 0.000 title abstract description 23
239000011651 chromium Substances 0.000 title abstract description 4
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract description 3
QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 title abstract 2
KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 title abstract 2
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 title description 2
229910052751 metal Inorganic materials 0.000 claims abstract description 24
239000002184 metal Substances 0.000 claims abstract description 24
230000009467 reduction Effects 0.000 claims abstract description 18
229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 17
150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 17
239000000155 melt Substances 0.000 claims abstract description 14
229910001615 alkaline earth metal halide Inorganic materials 0.000 claims abstract description 12
239000000203 mixture Substances 0.000 claims abstract description 10
229910044991 metal oxide Inorganic materials 0.000 claims abstract description 9
150000004706 metal oxides Chemical class 0.000 claims abstract description 9
150000001875 compounds Chemical class 0.000 claims abstract 2
229910001092 metal group alloy Inorganic materials 0.000 claims description 12
238000002844 melting Methods 0.000 claims description 11
230000008018 melting Effects 0.000 claims description 11
150000002739 metals Chemical class 0.000 claims description 10
WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 9
229910001634 calcium fluoride Inorganic materials 0.000 claims description 9
239000007788 liquid Substances 0.000 claims description 7
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
239000001301 oxygen Substances 0.000 claims description 6
229910052760 oxygen Inorganic materials 0.000 claims description 6
239000007789 gas Substances 0.000 claims description 5
238000000926 separation method Methods 0.000 claims description 4
150000004820 halides Chemical class 0.000 claims description 3
KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 2
239000007795 chemical reaction product Substances 0.000 claims 2
VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 abstract 1
239000002893 slag Substances 0.000 description 18
GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 14
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 13
239000011575 calcium Substances 0.000 description 13
OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 13
229910052791 calcium Inorganic materials 0.000 description 12
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
229910052802 copper Inorganic materials 0.000 description 10
239000010949 copper Substances 0.000 description 10
XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
239000011777 magnesium Substances 0.000 description 6
238000006243 chemical reaction Methods 0.000 description 5
238000004519 manufacturing process Methods 0.000 description 5
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
238000001816 cooling Methods 0.000 description 4
QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 4
229910052749 magnesium Inorganic materials 0.000 description 4
XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 4
229910052786 argon Inorganic materials 0.000 description 3
229910052788 barium Inorganic materials 0.000 description 3
DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
238000001704 evaporation Methods 0.000 description 3
230000008020 evaporation Effects 0.000 description 3
239000000843 powder Substances 0.000 description 3
239000011734 sodium Substances 0.000 description 3
229910003074 TiCl4 Inorganic materials 0.000 description 2
229910001632 barium fluoride Inorganic materials 0.000 description 2
239000003638 chemical reducing agent Substances 0.000 description 2
239000010436 fluorite Substances 0.000 description 2
238000010438 heat treatment Methods 0.000 description 2
229910001629 magnesium chloride Inorganic materials 0.000 description 2
229910001635 magnesium fluoride Inorganic materials 0.000 description 2
239000013528 metallic particle Substances 0.000 description 2
239000002245 particle Substances 0.000 description 2
239000012071 phase Substances 0.000 description 2
230000001681 protective effect Effects 0.000 description 2
239000011780 sodium chloride Substances 0.000 description 2
-1 titanium Chemical class 0.000 description 2
238000005292 vacuum distillation Methods 0.000 description 2
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 description 1
230000008901 benefit Effects 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
229910000423 chromium oxide Inorganic materials 0.000 description 1
238000005056 compaction Methods 0.000 description 1
230000008878 coupling Effects 0.000 description 1
238000010168 coupling process Methods 0.000 description 1
238000005859 coupling reaction Methods 0.000 description 1
239000013078 crystal Substances 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
238000010894 electron beam technology Methods 0.000 description 1
238000005516 engineering process Methods 0.000 description 1
238000002474 experimental method Methods 0.000 description 1
239000010439 graphite Substances 0.000 description 1
229910002804 graphite Inorganic materials 0.000 description 1
230000006698 induction Effects 0.000 description 1
230000001939 inductive effect Effects 0.000 description 1
238000009776 industrial production Methods 0.000 description 1
238000011835 investigation Methods 0.000 description 1
ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
238000002156 mixing Methods 0.000 description 1
230000009257 reactivity Effects 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000007790 solid phase Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1263—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction
- C22B34/1268—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction using alkali or alkaline-earth metals or amalgams
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/14—Obtaining zirconium or hafnium
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals

Definitions

the invention relates to a method according to the preamble of claim 1 or 2.
a method for direct reduction is known for example from DE-AS 20 34 385.
the metal oxides to be reduced, the slag components and the metal acting as a reducing agent are mixed as a powder, and the powder mixture is partially melted in a water-cooled induction crucible. Since the required inductive coupling can only take place on the metallic component of the mixture, the process only starts up slowly.
the reducing agent (Ca) must be added in excess.
the metallic titanium in this reaction is present in the solid phase in small particles, so that after the separation, a vacuum distillation to remove excess alkaline earth metal requires a compaction of the titanium particles with subsequent, possibly two, remelting. For this reason, the process could not assert itself in terms of production technology.
Titanium oxide (TiO2) melts at 1825 ° C. Reduction of the titanium oxide melt at a temperature above 1825 ° C, e.g. with calcium, is not possible because calcium already evaporates at a temperature of 1484 ° C and is no longer available for the reduction.
the invention is therefore based on the object of specifying a method of the type described in the introduction in which alkaline earth metals can be used economically for direct reduction of the oxides in order to be able to produce the metals and metal alloys concerned on an industrial scale.
the slag melt formed from said metal oxides and the alkaline earth metal halide has, depending on the mixing ratio, a substantially lower melting point than the pure metal oxides.
alkaline earth metals such as magnesium or barium can also be used for the purpose of the invention. It is advisable to replace the fluorspar (CaF2) contained in the slag, which is particularly suitable for calcium, in whole or in part by the corresponding fluoride, such as MgF2 or BaF2. If the slag does not contain magnesium fluoride or barium fluoride, magnesium or barium must be added together with calcium. Since all alkaline earth metals are soluble in the liquid calcium, the evaporation losses of these elements are significantly smaller.
the reduction takes place, for example, for the production of titanium in a liquid slag phase by setting a slag temperature which is above the melting point of titanium, ie at 1675 ° C.
the titanium remains liquid. Due to the difference in density, the liquid titanium is inevitably separated from the Slag phase. The liquid titanium can then be poured into blocks.
the slag temperature can be set as desired in all three of the furnaces mentioned above by appropriate energy supply. With a sensible design of the melting furnace, the reduction of the oxides in the slag and the removal of the metal melt can be carried out continuously.
the conditions in the characterizing part of claim 1 or 2, according to which the separation is to take place at a temperature above the melting point of the metal to be obtained can be accomplished in two ways.
metals such as Ti, Zr and Cr, whose melting point is above the reaction temperature, heating is necessary.
metals such as Nd and Sm, the melting point of which is below the reaction temperature, heating is unnecessary.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Life Sciences & Earth Sciences (AREA)
Environmental & Geological Engineering (AREA)
General Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Manufacture And Refinement Of Metals (AREA)

EP89107119A 1988-05-24 1989-04-20 Procédé pour l'élaboration, à partir de leurs oxydes, de métaux tels que le titane, le zirconium, le chrome, le samarium ou le néodyme Withdrawn EP0343378A1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3817553		1988-05-24
DE19883817553 DE3817553A1 (de)	1988-05-24	1988-05-24	Verfahren zum herstellen von titan und zirkonium

Publications (1)

Publication Number	Publication Date
EP0343378A1 true EP0343378A1 (fr)	1989-11-29

Family

ID=6354986

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89107119A Withdrawn EP0343378A1 (fr)	1988-05-24	1989-04-20	Procédé pour l'élaboration, à partir de leurs oxydes, de métaux tels que le titane, le zirconium, le chrome, le samarium ou le néodyme

Country Status (5)

Country	Link
EP (1)	EP0343378A1 (fr)
JP (1)	JPH0225526A (fr)
CN (1)	CN1037929A (fr)
BR (1)	BR8902373A (fr)
DE (1)	DE3817553A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN101550494B (zh) *	2008-03-31	2011-06-08	北京有色金属研究总院	一种制备稀土金属的方法
CN101624659B (zh) *	2009-01-06	2011-06-15	李健民	制备低含氧金属锆的方法
CN104120288B (zh) *	2014-07-21	2016-01-20	东北大学	一种直接热还原连续制备金属钐的方法
CN104152695B (zh) *	2014-07-21	2016-06-22	东北大学	一种直接热还原连续制备金属铥的方法
CN105907960B (zh) *	2016-04-22	2018-08-21	王树立	铅精矿和锌阳极泥联合资源化处理的方法
CN111575743A (zh) *	2020-05-26	2020-08-25	中国恩菲工程技术有限公司	生产金属铅的方法
WO2022108007A1 (fr) *	2020-11-17	2022-05-27	주식회사 케이에스엠테크놀로지	Procédé et système de réduction pour un oxyde métallique à point de fusion élevé à l'aide d'électrolytes à base de fluorure

Citations (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH111823A (fr) *	1923-02-12	1925-09-16	Westinghouse Lamp Co	Procédé pour l'obtention de métaux à point de fusion élevé en partant de leurs oxydes.
US1738669A (en) *	1927-11-09	1929-12-10	Westinghouse Lamp Co	Method of reducing rare refractory-metal oxides
US2537068A (en) *	1946-11-26	1951-01-09	Westinghouse Electric Corp	Manufacture of zirconium
FR1112441A (fr) *	1953-09-23	1956-03-14	Ethyl Corp	Perfectionnements relatifs à la préparation des métaux réfractaires
GB795162A (en) *	1955-07-20	1958-05-21	Electro Chimie Metal	Improvements in or relating to the production of metals
GB798750A (en) *	1955-04-01	1958-07-23	Dominion Magnesium Ltd	Improvements in the purification or production of titanium
US2904428A (en) *	1954-09-22	1959-09-15	Chicago Dev Corp	Method of reducing titanium oxide
FR2119174A6 (en) *	1970-12-23	1972-08-04	Commissariat Energie Atomique	Recovery of high melting metals from oxides directly - using a magnesium and a fluoride slag
US3721549A (en) *	1969-07-11	1973-03-20	Commissariat A I En Atomique	Preparation of metal ingots from the corresponding metal oxides
EP0170372A1 (fr) *	1984-07-03	1986-02-05	General Motors Corporation	Réduction métallothermique d'oxydes de terres rares par du calcium métallique
EP0170373A1 (fr) *	1984-07-03	1986-02-05	General Motors Corporation	Réduction métallothermique d'oxydes de terres rares
EP0238185A1 (fr) *	1986-03-18	1987-09-23	General Motors Corporation	Réduction métallothermique de chlorures de terres rares
EP0265413A2 (fr) *	1986-08-19	1988-04-27	Treibacher Chemische Werke Aktiengesellschaft	Procédé pour la fabrication de métaux du groupe des terres rares et des alliages contenant des terres rares

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE441640C (de) *		1927-03-09	Westinghouse Lamp Co	Ausscheiden von Metallen aus ihren Metallverbindungen

1988
- 1988-05-24 DE DE19883817553 patent/DE3817553A1/de not_active Withdrawn
1989
- 1989-04-20 EP EP89107119A patent/EP0343378A1/fr not_active Withdrawn
- 1989-05-24 CN CN 89103617 patent/CN1037929A/zh active Pending
- 1989-05-24 JP JP12903589A patent/JPH0225526A/ja active Pending
- 1989-05-24 BR BR898902373A patent/BR8902373A/pt not_active Application Discontinuation

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH111823A (fr) *	1923-02-12	1925-09-16	Westinghouse Lamp Co	Procédé pour l'obtention de métaux à point de fusion élevé en partant de leurs oxydes.
US1738669A (en) *	1927-11-09	1929-12-10	Westinghouse Lamp Co	Method of reducing rare refractory-metal oxides
US2537068A (en) *	1946-11-26	1951-01-09	Westinghouse Electric Corp	Manufacture of zirconium
FR1112441A (fr) *	1953-09-23	1956-03-14	Ethyl Corp	Perfectionnements relatifs à la préparation des métaux réfractaires
US2904428A (en) *	1954-09-22	1959-09-15	Chicago Dev Corp	Method of reducing titanium oxide
GB798750A (en) *	1955-04-01	1958-07-23	Dominion Magnesium Ltd	Improvements in the purification or production of titanium
GB795162A (en) *	1955-07-20	1958-05-21	Electro Chimie Metal	Improvements in or relating to the production of metals
US3721549A (en) *	1969-07-11	1973-03-20	Commissariat A I En Atomique	Preparation of metal ingots from the corresponding metal oxides
FR2119174A6 (en) *	1970-12-23	1972-08-04	Commissariat Energie Atomique	Recovery of high melting metals from oxides directly - using a magnesium and a fluoride slag
EP0170372A1 (fr) *	1984-07-03	1986-02-05	General Motors Corporation	Réduction métallothermique d'oxydes de terres rares par du calcium métallique
EP0170373A1 (fr) *	1984-07-03	1986-02-05	General Motors Corporation	Réduction métallothermique d'oxydes de terres rares
EP0238185A1 (fr) *	1986-03-18	1987-09-23	General Motors Corporation	Réduction métallothermique de chlorures de terres rares
EP0265413A2 (fr) *	1986-08-19	1988-04-27	Treibacher Chemische Werke Aktiengesellschaft	Procédé pour la fabrication de métaux du groupe des terres rares et des alliages contenant des terres rares

Also Published As

Publication number	Publication date
JPH0225526A (ja)	1990-01-29
DE3817553A1 (de)	1989-11-30
CN1037929A (zh)	1989-12-13
BR8902373A (pt)	1990-01-16

Legal Events

Date	Code	Title	Description
1989-10-14	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
1989-11-29	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): DE FR GB IT SE
1990-11-23	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1991-01-09	18D	Application deemed to be withdrawn	Effective date: 19900530

Publication	Publication Date	Title
EP0479757B1 (fr)	1994-11-30	Procédé et dispositif pour la fabrication d'alliages à base de titane-aluminium
DE69216171T2 (de)	1997-06-19	Methode zum Schmelzen von Titanaluminid-Legierungen
DE2731521A1 (de)	1978-04-06	Verfahren zur herstellung von ferromolybdaenlegierungen
DE3822616C2 (de)	1997-05-07	Entfernung von Lithiumnitrid aus Lithiummetall
DE2137996A1 (de)	1972-02-10	Verfahren zum Eintragen eines festen Metalls in eine Metallschmelze
EP0343378A1 (fr)	1989-11-29	Procédé pour l'élaboration, à partir de leurs oxydes, de métaux tels que le titane, le zirconium, le chrome, le samarium ou le néodyme
DE3635194A1 (de)	1987-05-14	Vorlegierung fuer die herstellung einer titanbasislegierung und verfahren zur herstellung der vorlegierung
DE3129563C2 (fr)	1988-11-03
DE2529230A1 (de)	1976-01-29	Verfahren zur herstellung von siliciden reaktiver metalle
EP0249050B1 (fr)	1991-07-24	Procédé de refusion sous laitier électroconducteur de métaux en particulier de métaux contenant des éléments d'alliage à haute affinité pour l'oxygène
DE2305478A1 (de)	1975-12-04	Verfahren zum herstellen dispersionsverstaerkter metalle oder metalllegierungen
DE2309748C3 (de)	1979-10-04	Zusatzmittel zum Reinigen von Stahlschmelzen
DE1758005B2 (de)	1976-11-11	Schweissmittel fuer das verdeckte lichtbogenschweissen
DE2406652B2 (de)	1976-04-29	Aufschweiss-flussmittel
EP0583670B1 (fr)	1997-10-08	Amalgame pour réactions métallothermiques
DE2460003A1 (de)	1975-07-03	Verfahren zum veraendern der physischen eigenschaften und/oder der chemischen zusammensetzung einer metallegierung
DE2303668B2 (de)	1978-05-24	Zubereitungen zur Behandlung von geschmolzenem Stahl
DE2145912C3 (de)	1973-10-18	Verfahren zur Herstellung von Aluminium
DE2321466C3 (de)	1979-06-28	Verfahren zum Erschmelzen von schwerschmelzbaren Metallen und Legierungen
DE2225763A1 (de)	1972-12-07	Verfahren und Vorrichtung zur Gewinnung von Metallen in massiver Form aus den Oxiden
DE1758746C (de)	1973-08-16	Startertablette fur das Elektro schlackenumschmelz verfahren
DE2259107C2 (de)	1983-05-26	Molybdän-Aluminium-Titan-Vorlegierung
DE678536C (de)	1939-07-20	Verfahren zur Raffination von Aluminium oder Aluminiumlegierungen
DE1758455C3 (de)	1976-08-05	Verfahren zum Frischen von legierten kohlenstoffhaltigen Eisenschmelzen
DE2658504C2 (de)	1986-04-30	Verfahren zum Herstellen einer Legierung