EP0097993A1 - Procédé pour la fabrication d'un alliage aluminium-silicium à partir de leucite - Google Patents
Procédé pour la fabrication d'un alliage aluminium-silicium à partir de leucite Download PDFInfo
- Publication number
- EP0097993A1 EP0097993A1 EP83200887A EP83200887A EP0097993A1 EP 0097993 A1 EP0097993 A1 EP 0097993A1 EP 83200887 A EP83200887 A EP 83200887A EP 83200887 A EP83200887 A EP 83200887A EP 0097993 A1 EP0097993 A1 EP 0097993A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxides
- aluminium
- alkaline
- producing
- alloy
- Prior art date
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 title abstract 2
- 229910052907 leucite Inorganic materials 0.000 title description 3
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 5
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 238000006722 reduction reaction Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 5
- 229910000676 Si alloy Inorganic materials 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 abstract description 5
- 239000000571 coke Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/22—Remelting metals with heating by wave energy or particle radiation
- C22B9/226—Remelting metals with heating by wave energy or particle radiation by electric discharge, e.g. plasma
-
- 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
- C22B21/00—Obtaining aluminium
- C22B21/02—Obtaining aluminium with reducing
-
- 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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/005—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys using plasma jets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
Definitions
- This invention relates to a process for producing an Al-Si alloy from concentrates containing the corresponding oxides, even if chemically combined with each other in the form of alumino-silicates.
- a large number of processes have been developed during the last 50 years fro recovering alumina and alkalies, including experiments in pilot plants and sometimes on an industrial scale.
- the chemical-physical energy necessary to break the formation bond of leucite or Al and Si oxides is provided both by direct reduction with the carbon and by the energy associated with the Al-Si solution in liquid phase, which subtracts Si and Al as they become formed, thus lowering the activity of the reaction products.
- the alkaline oxides contained in the silico-aluminous concentrates are recovered separately.
- the present invention relates to a process for producing a metal alloy from the metal oxides either in individual form or chemically combined with each other, by reducing the oxides by means of a carbon-based reducing agent in the presence of a plasma arc burner in a shaft reactor filled with reducing material of suitable size, and is characterised in that the individual or chemically combined oxides are oxides essentially of aluminium and silicon, with oxides of alkaline and/or alkaline earth metals, the reduction reaction taking place at a temperature exceeding 2000°C, the product obtained being an alloy of aluminium and silicon.
- the alkaline and/or alkaline earth metal oxides are separated at the top of the shaft reactor.
- a shaft reactor 1 is filled with a reducing agent 2, preferably coke.
- a blast furnace charger 3 is mounted at the top of the reactor 1, directly above the reactor itself, and is arranged to be continuously filled with coke to a predetermined level.
- two level indicators 5, 6 are installed, to interact with filling members, not shown.
- the material to be treated containing silicon and aluminium oxide, is fed through the inlet 9 either alone or in combination with the reducing material, which may also be fed through 10.
- tapping means 13 for the slag there is also a plasma arc burner 11 with a feed pipe 12, and on the base of the reactor 1 there are mounted tapping means 13 for the slag, and tapping means 14 for the liquid metal.
- the material to be treated is subjected to air blasting in the reaction zone of the reactor 1, where together with the reducing agent it becomes rapidly heated and reacts to form the liquid and gaseous reduction products.
- the liquid products consist of an Al + Si alloy, and slag deriving from slagging agents either added separately during the operation or mixed with the material containing the metal oxides, a certain quantity of ash originating from the reducing agent also being produced.
- the gaseous product consists of unreacted alkaline oxides and reduction gas, of which the composition depends on the reducing agent used.
- the liquid reduction products are collected on the base of the shaft and can be discharged through the tapping holes 13, 14, whereas the gaseous products, essentially alkaline oxides, rise upwards through the shaft and are extracted through the pipe 7.
- the coke in the shaft forms a permeable layer, through which the reaction products pass respectively towards the base and towards the top of the shaft, and in this respect the coke has the following purposes:
- reaction gas which leaves the shaft is made to pass through the condenser 8, in which it is separated, and the metal oxides contained in it are condensed and discharged from 15.
- the remaining gas consisting mainly of carbon monoxide and gaseous hydrogen, leaves the condenser at 16 and can be used for various purposes.
- the material containing a leucite concentrate had the following composition: (in terms of its main elements)
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Silicon Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83200887T ATE22932T1 (de) | 1982-06-22 | 1983-06-17 | Verfahren zur herstellung von aluminiumsiliziumlegierungen aus leuzit. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2197682 | 1982-06-22 | ||
| IT21976/82A IT1152984B (it) | 1982-06-22 | 1982-06-22 | Procedimento per la produzione di una lega alluminio silicio da concentrati contenenti gli ossidi corrispondenti anche chimicamente tra loro e/o con altri ossidi metallici |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0097993A1 true EP0097993A1 (fr) | 1984-01-11 |
| EP0097993B1 EP0097993B1 (fr) | 1986-10-15 |
Family
ID=11189648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83200887A Expired EP0097993B1 (fr) | 1982-06-22 | 1983-06-17 | Procédé pour la fabrication d'un alliage aluminium-silicium à partir de leucite |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0097993B1 (fr) |
| AT (1) | ATE22932T1 (fr) |
| DE (1) | DE3366969D1 (fr) |
| ES (1) | ES523705A0 (fr) |
| IT (1) | IT1152984B (fr) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735654A (en) * | 1986-12-24 | 1988-04-05 | Aluminum Company Of America | Process for reduction of metal compounds by reaction with alkaline earth metal aluminide |
| WO1988002409A1 (fr) * | 1986-09-29 | 1988-04-07 | Vsesojuzny Nauchno-Issledovatelsky I Proektny Inst | Procede pour produire un alliage d'alumino-silicium contenant 2-22 pour cent en poids de silicium |
| US4765831A (en) * | 1986-12-24 | 1988-08-23 | Aluminum Company Of America | Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen stripping agent |
| US4765832A (en) * | 1986-12-24 | 1988-08-23 | Aluminum Company Of America | Process for carbothermic production of calcium aluminide using slag containing calcium aluminate |
| US4769067A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of an alkaline earth metal aluminide such as calcium aluminide and recycling of reactant byproducts |
| US4769069A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with halide stripping agent |
| US4769068A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with sulfurous stripping agent |
| US4770696A (en) * | 1986-12-24 | 1988-09-13 | Aluminum Company Of America | Process for carbothermic production of calcium aluminide using calcium carbide |
| US4812168A (en) * | 1986-12-24 | 1989-03-14 | Aluminum Company Of America | Process for carbothermic production of alkaline earth metal aluminide and recovery of same |
| GB2228014A (en) * | 1988-12-08 | 1990-08-15 | Plasma Energy Corp | Recovery of free aluminum from aluminum dross using plasma energy without use of a salt flux |
| CN104674031A (zh) * | 2015-03-02 | 2015-06-03 | 天津立中合金集团有限公司 | 铝合金熔炼过程中工业硅的新型加入方法 |
| WO2024162687A1 (fr) * | 2023-01-30 | 2024-08-08 | 부산대학교 산학협력단 | Matériau composite à matrice d'aluminium possédant une structure à gradient fonctionnel ayant une distribution régulée de nitrure d'aluminium et son procédé de préparation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365185A (en) * | 1963-01-31 | 1968-01-23 | Boliden Ab | Production of metals from pulverulent materials by flash smelting in an electrically heated furnace |
| FR2329753A1 (fr) * | 1975-11-03 | 1977-05-27 | Bethlehem Steel Corp | Procede de reduction de minerais |
| FR2330772A1 (fr) * | 1975-11-07 | 1977-06-03 | Reynolds Metals Co | Perfectionnements aux procedes pour la production de l'aluminium |
| FR2372900A1 (fr) * | 1976-12-06 | 1978-06-30 | Aluminum Co Of America | Procede de production d'alliages d'aluminium et de silicium par reduction carbothermique |
| FR2396253A1 (fr) * | 1977-07-01 | 1979-01-26 | Southwire Co | Four a cuve verticale et a arc de plasma |
| EP0058922A1 (fr) * | 1981-02-23 | 1982-09-01 | ALLUMINIO ITALIA S.p.A. | Procédé métallurgique de traitement de minerais silico-alumino-alcalins, en particulier de minerais leucitiques |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661561A (en) * | 1970-08-03 | 1972-05-09 | Ethyl Corp | Method of making aluminum-silicon alloys |
-
1982
- 1982-06-22 IT IT21976/82A patent/IT1152984B/it active
-
1983
- 1983-06-17 DE DE8383200887T patent/DE3366969D1/de not_active Expired
- 1983-06-17 AT AT83200887T patent/ATE22932T1/de not_active IP Right Cessation
- 1983-06-17 EP EP83200887A patent/EP0097993B1/fr not_active Expired
- 1983-06-21 ES ES523705A patent/ES523705A0/es active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365185A (en) * | 1963-01-31 | 1968-01-23 | Boliden Ab | Production of metals from pulverulent materials by flash smelting in an electrically heated furnace |
| FR2329753A1 (fr) * | 1975-11-03 | 1977-05-27 | Bethlehem Steel Corp | Procede de reduction de minerais |
| FR2330772A1 (fr) * | 1975-11-07 | 1977-06-03 | Reynolds Metals Co | Perfectionnements aux procedes pour la production de l'aluminium |
| FR2372900A1 (fr) * | 1976-12-06 | 1978-06-30 | Aluminum Co Of America | Procede de production d'alliages d'aluminium et de silicium par reduction carbothermique |
| FR2396253A1 (fr) * | 1977-07-01 | 1979-01-26 | Southwire Co | Four a cuve verticale et a arc de plasma |
| EP0058922A1 (fr) * | 1981-02-23 | 1982-09-01 | ALLUMINIO ITALIA S.p.A. | Procédé métallurgique de traitement de minerais silico-alumino-alcalins, en particulier de minerais leucitiques |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU584771B2 (en) * | 1986-09-29 | 1989-06-01 | Vsesojuzny Nauchno-Issledovatelsky I Proektny Institut Aljuminievoi, Magnievoi I Elektrodnoi Promyshlennosti | Method of obtaining aluminosilicon alloy containing 2-22 per cent by weight of silicon |
| WO1988002409A1 (fr) * | 1986-09-29 | 1988-04-07 | Vsesojuzny Nauchno-Issledovatelsky I Proektny Inst | Procede pour produire un alliage d'alumino-silicium contenant 2-22 pour cent en poids de silicium |
| US4765832A (en) * | 1986-12-24 | 1988-08-23 | Aluminum Company Of America | Process for carbothermic production of calcium aluminide using slag containing calcium aluminate |
| US4735654A (en) * | 1986-12-24 | 1988-04-05 | Aluminum Company Of America | Process for reduction of metal compounds by reaction with alkaline earth metal aluminide |
| US4769067A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of an alkaline earth metal aluminide such as calcium aluminide and recycling of reactant byproducts |
| US4769069A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with halide stripping agent |
| US4769068A (en) * | 1986-12-24 | 1988-09-06 | Aluminum Company Of America | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with sulfurous stripping agent |
| US4770696A (en) * | 1986-12-24 | 1988-09-13 | Aluminum Company Of America | Process for carbothermic production of calcium aluminide using calcium carbide |
| US4812168A (en) * | 1986-12-24 | 1989-03-14 | Aluminum Company Of America | Process for carbothermic production of alkaline earth metal aluminide and recovery of same |
| US4765831A (en) * | 1986-12-24 | 1988-08-23 | Aluminum Company Of America | Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen stripping agent |
| GB2228014A (en) * | 1988-12-08 | 1990-08-15 | Plasma Energy Corp | Recovery of free aluminum from aluminum dross using plasma energy without use of a salt flux |
| GB2228014B (en) * | 1988-12-08 | 1993-11-24 | Plasma Energy Corp | Recovery of free aluminum from aluminum dross using plasma energy without use of a salt flux |
| CN104674031A (zh) * | 2015-03-02 | 2015-06-03 | 天津立中合金集团有限公司 | 铝合金熔炼过程中工业硅的新型加入方法 |
| WO2024162687A1 (fr) * | 2023-01-30 | 2024-08-08 | 부산대학교 산학협력단 | Matériau composite à matrice d'aluminium possédant une structure à gradient fonctionnel ayant une distribution régulée de nitrure d'aluminium et son procédé de préparation |
Also Published As
| Publication number | Publication date |
|---|---|
| ES8501006A1 (es) | 1984-11-01 |
| ATE22932T1 (de) | 1986-11-15 |
| IT1152984B (it) | 1987-01-14 |
| ES523705A0 (es) | 1984-11-01 |
| EP0097993B1 (fr) | 1986-10-15 |
| IT8221976A0 (it) | 1982-06-22 |
| DE3366969D1 (en) | 1986-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0097993A1 (fr) | Procédé pour la fabrication d'un alliage aluminium-silicium à partir de leucite | |
| CN110129583B (zh) | 火法炼锌系统 | |
| CA1147558A (fr) | Methode de recuperation de metaux volatils contenus dans des oxydes metalliques | |
| AU598237B2 (en) | Recovery of values from antimony ores and concentrates | |
| WO1998036102A1 (fr) | Raffinage de minerais contenant du sulfure de zinc | |
| CN106591592A (zh) | 一种富冶熔炼炉及处理多金属复杂金铜矿的处理工艺 | |
| EP0126810A1 (fr) | Procédé de réduction carbothermique de l'alumine | |
| PL139606B1 (en) | Method reclaiming metals from molten slag | |
| CN111411230A (zh) | 悬浮熔炼电热还原炉和冶炼锌精矿的方法 | |
| US4409021A (en) | Slag decarbonization with a phase inversion | |
| CA1159261A (fr) | Methode et appareillage pour la recuperation pyrometallurique du cuivre | |
| EP3554998B1 (fr) | Procédé de production de silicium de qualité commerciale | |
| US4865643A (en) | Smelting process for making elemental silicon and alloys thereof, and apparatus therefor | |
| US4699653A (en) | Thermal production of magnesium | |
| EP0557312B1 (fr) | Distillation par sulfidisation directe de zinc | |
| US4519836A (en) | Method of processing lead sulphide or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof | |
| US2066665A (en) | Process for the treatment of ores containing iron | |
| EP0038124B1 (fr) | Procédé permettant une séparation à basse température et sans pollution par le SO2 du plomb à partir d'un matériau contenant du sulfure de plomb | |
| US4514221A (en) | Method of smelting zinc by injection smelting | |
| NO146995B (no) | Fremgangsmaate ved smelteutvinning av bly og soelv fra bly-soelvrester. | |
| CN219776324U (zh) | 冶炼装置 | |
| EP0196800A1 (fr) | Production de plomb à partir de déchets | |
| US5104096A (en) | Smelting apparatus for making elemental silicon and alloys thereof | |
| CA1275174C (fr) | Production du plomb secondaire | |
| US3836357A (en) | Direct reduction process for production of aluminium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| AK | Designated contracting states |
Designated state(s): AT BE DE FR GB LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19840703 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE FR GB LU NL SE |
|
| REF | Corresponds to: |
Ref document number: 22932 Country of ref document: AT Date of ref document: 19861115 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 3366969 Country of ref document: DE Date of ref document: 19861120 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| NLS | Nl: assignments of ep-patents |
Owner name: AGIP S.P.A. TE MILAAN, ITALIE. |
|
| NLS | Nl: assignments of ep-patents |
Owner name: NUOVA SAMIM S.P.A. TE MILAAN, ITALIE. |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19940518 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19940607 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19940608 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19940610 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19940622 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19940627 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19940630 Year of fee payment: 12 Ref country code: LU Payment date: 19940630 Year of fee payment: 12 |
|
| EPTA | Lu: last paid annual fee | ||
| EAL | Se: european patent in force in sweden |
Ref document number: 83200887.4 |
|
| 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: 19950617 Ref country code: GB Effective date: 19950617 Ref country code: AT Effective date: 19950617 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19950618 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19950630 |
|
| BERE | Be: lapsed |
Owner name: NUOVA SAMIM S.P.A. Effective date: 19950630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19960101 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19950617 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19960229 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19960101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19960301 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 83200887.4 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |