EP1598114A1 - Procédé de séparation de silice et d'olivine dans un mélange en contenant et dispositif de mise en oeuvre de ce procédé - Google Patents
Procédé de séparation de silice et d'olivine dans un mélange en contenant et dispositif de mise en oeuvre de ce procédé Download PDFInfo
- Publication number
- EP1598114A1 EP1598114A1 EP05290795A EP05290795A EP1598114A1 EP 1598114 A1 EP1598114 A1 EP 1598114A1 EP 05290795 A EP05290795 A EP 05290795A EP 05290795 A EP05290795 A EP 05290795A EP 1598114 A1 EP1598114 A1 EP 1598114A1
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- European Patent Office
- Prior art keywords
- mixture
- silica
- olivine
- magnetic
- particles
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
- B03C3/30—Plant or installations without electricity supply, e.g. using electrets in which electrostatic charge is generated by passage of the gases, i.e. tribo-electricity
Definitions
- the present invention relates to a method of separation of silica and olivine in a mixture of container.
- the present invention also relates to a device for implementing this method.
- the invention relates to a recycling process of a mixture containing silica and olivine from the manufacture of parts metal molding.
- particles or a mixture of particles are used to form the temporary rigid structure serving as a mold and intended to receive the metal fusion.
- the piece obtained is extracted from the mold by a stall consisting of separating the particles from the room metal obtained.
- the silica has many advantages. Indeed, this guy sand has an abundance of significant deposits, its extraction is easy, its refractoriness is sufficient since its melting temperature is close to 1700 ° C and its cost price is low.
- the silica can react chemically and / or thermally with certain metals at the level of the interface with the metal used which limits its use.
- chromite and olivine can be used as sand on contact of steel, called sand of contact, the sand allowing fill the rest of the mold, called sand filling, which may be silica.
- olivine For the manufacture of this type of metal parts, the use of olivine as contact sand has certain advantages since its cost is lower than that of chromite, olivine does not have any constraints on the rejects contrary to chromite which can lead to the formation of Cr VI , and the fineness of the grain of olivine makes it possible to manufacture parts with properties of improved surfaces.
- the object of the invention is therefore mainly to separation process of olivine and silica into a mixture containing it for the purpose of recycling.
- the mixture containing silica and olivine 1 may be derived from the operation of stalling performed during the manufacture of parts metal molding and contains between 5 and 40% olivine, silica and particles strongly magnetic such as iron oxide particles.
- the mixture enriched with silica 3 can be used as filling sand.
- the rebalanced mixture olivine and silica 4 contains approximately 50% silica and 50% olivine.
- the treatment step 6 of the process of the invention consists of subject the rebalanced mixture to olivine and silica 4 at a temperature above 400 ° C.
- the heat treatment step 6 consists in treating the rebalanced mixture with olivine and in silica 4 in a fluidized bed furnace 25 to a temperature of approximately 650 ° C.
- the mixture rebalanced to olivine and silica 4 be cooled to a temperature of less than 50 ° C.
- the regenerated mixture of silica 11 can be used as hanging sand and mixing regenerated to olivine 9 contains more than 90% olivine and can be used as contact sand.
- the mixture of silica and olivine obtained in step (c2) can undergo again the second step of magnetic sorting 8.
- the first sorting machine magnetic 13, the heat treatment chamber 25 and the second sorting machine 33 are arranged in this order and in series.
- the first magnetic sorting machine 13 may comprise a first magnetic separator 16 set to separate the strongly magnetic particles 12 from mixture containing olivine and silica 1 and a second magnetic separator 21 to separate, from mixture depleted in strongly magnetic particles 12, the strongly magnetic residual particles 12 and obtain a mixture enriched with silica 3 and a mixture rebalanced to olivine and silica 4.
- the first 16 and second 21 Magnetic separators are constituted by first 16 and second 21 magnetized metal drums in rotation on which the mixture to be separated 1, 19 circulates at an appropriate speed and by one or more shutters adjustable inclination 20, 23, 24 arranged downstream of the drums 16,21 so as to separate the different jets from sand thrown by drums 16,21 and corresponding respectively to strongly magnetic particles 5, mixture enriched with silica 3 and the rebalanced mixture olivine and silica 4.
- a flap 20 can be arranged in downstream of the first magnetic drum 16 so as to separate of the mixture containing olivine and silica 1 strongly magnetic particles 5.
- two shutters can be arranged downstream of the second drum 21 so as to separate selectively, from the mixture depleted in strongly magnetic particles 19, the strongly magnetic residual particles 5, the mixture enriched in silica 3, and the mixture rebalanced in olivine and silica 4.
- the treatment chamber thermal 25 is constituted by a fluidized bed furnace wherein the rebalanced mixture of olivine and silica 4 progresses in the furnace by fluidization to a temperature of about 650 ° C.
- a cooler 32 is disposed in downstream of the oven and allows to bring the rebalanced mixture in olivine and silica 4 at a lower temperature at 50 ° C.
- the second sorting machine magnetic 33 may comprise a first separator magnetic 36 set to separate the particles strongly 12 of the mixture resulting from the heat treatment 7 and a second magnetic separator 41 set to separate, from this mixture depleted in particles strongly magnetic 39, strongly magnetic particles residuals 12, the regenerated mixture of silica 11, the regenerated mixture of olivine 9 and a mixture of olivine and of silica 10.
- the first and second separators 36,41 are first 36 and second 41 metal drums magnetized in rotation on which mixture to be separated 7.39 circulates at a speed appropriate and by one or more tilt flaps adjustable 40, 43, 44, 45 arranged downstream of the drums 36,41 so as to separate the different jets of sand projected by drums 36,41 and corresponding respectively to strongly magnetic particles 12, to the regenerated mixture of silica 11, to the regenerated mixture olivine 9 and the mixture of olivine and silica 10.
- a flap 40 may be disposed downstream of this first drum magnet 36 being adjusted to separate, from mixture resulting from the heat treatment 7 circulating on the first drum, strongly magnetic particles 12.
- three flaps 43, 44, 45 may be disposed downstream thereof second drum 41 being adjusted to separate selectively from the particulate depleted mixture magnetic devices 39 traveling on the second drum 41, the strongly magnetic residual particles 12, the regenerated mixture of silica 11, the regenerated mixture olivine 9 and the mixture of olivine and silica 10.
- the device of the invention can include means for the mixture of olivine and silica 10 be introduced back into the second magnetic sorting machine 33.
- the sand consisting of a mixture of about 85% silica, 15% olivine and iron oxide particles and metal particles from the casting in small quantities, is screened and sieved to remove scrap or pieces of agglomerated sand.
- the sand is sent by pneumatic transport to a silo buffer.
- the sand from the shake operation 1 undergoes a first step of magnetic sort 2 at the end of which are separated a mixture regenerated enriched silica 3 containing about 85% of silica that is used as filling sand for the manufacture of a metal part, a mixture rebalanced to olivine and silica 4 containing about 50% olivine and 50% silica intended to undergo the stage subsequent heat treatment and particles strongly magnetic 5 which are eliminated from the circuit.
- the mixture enriched in silica represents about 60% rebalanced the mass of sand 1
- the regenerated mixture of olivine and silica represents about 30% of the mass of sand 1 and the strongly magnetic particles about 10%.
- Rebalanced mixture of olivine and silica 4 then undergoes a heat treatment step 6 at a temperature of about 650 ° C followed by cooling to a temperature below 50 ° C.
- This heat treatment step 6 allows in particular to obtain a physical dissociation of the grains of silica and olivine which may have agglomerated the presence of the chemical components used during the molding operation such as resins for example.
- the rebalanced mixture of olivine and silica 7 obtained at the end of the heat treatment step 6 then undergoes a second step of magnetic sorting 8 to the outcome of which is separated a regenerated mixture silica 11 containing more than 70% silica that is directed to a storage silo for reuse as hanging sand, a regenerated mixture of olivine 9 containing more than 90% olivine and which may be reused as contact sand during manufacture of a new metal part, particles strongly magnetic 12 which are eliminated from the circuit and a mixture of olivine and silica 10 which undergoes the second step of magnetic sorting 8.
- the regenerated mixture silica represents about 10% by weight of the mass of sand 1
- the regenerated mixture of olivine represents about 15% by weight of the mass of sand 1
- the strongly magnetic particles about 0.5%
- the mixture of olivine and silica about 8.5%.
- the shakeout sand 1 undergone, during the first stage of magnetic sorting 2 put implemented by the first magnetic sorting machine 13, a first step of magnetic separation 14 followed a second magnetic separation step 15.
- the first step of magnetic separation 14 is to recover some of the particles strongly magnetic materials such as iron oxide particles and metal particles from the casting finding in the shaking sand 1 in order to facilitate the second magnetic separation step 15.
- a first separation machine magnet 16 is constituted by a first drum in rotation 16 having a metal casing to inside which magnets are arranged permanent rare earths.
- the shaking sand 1 is brought to the first rotating drum 16 by a vibrating mat 17 surmounted a squeegee adjustable in height 18 allowing to spread the sand evenly over the carpet 17.
- the sand 1 is then driven by the drum 16 and the different components of sand 1 are, under the combined influence of their magnetic properties respective centrifugal force from the drum 16 in rotation and the effect of gravity, projected downstream drum in the form of sand jets according to different inclinations.
- the inclination of the flap 20 is adjusted so as to recover a maximum of strongly magnetic particles.
- the mixture depleted in strongly magnetic particles 19 is brought up to a second rotating drum 21 by a vibrating belt 22.
- Two adjustable tilt flaps 23 and 24 are disposed downstream of the second drum in rotation so to recover strongly magnetic particles residuals 5, a mixture enriched in silica containing about 85% silica and a first rebalanced mixture olivine and silica 4 containing about 50% silica and 50% olivine.
- the presence of the first drum 16 is preferable to prevent clogging of the second drum 21 and to obtain optimal separation at the level of second drum 21.
- the rebalanced mixture in olivine and silica 4 is directed to the enclosure of heat treatment consisting of a bed oven fluidized 25 well known to those skilled in the art.
- the fluidized bed furnace mainly comprises a metal enclosure thermally insulated by a refractory lining 26, caissons of fluidization 27, burner ramps consisting of perforated tubes equipped with injectors 28 and burners pilots 29 intended to ignite the air-gas mixture used in ramps and the standby of installation.
- the fumes from combustion are directed in an afterburner chamber 30 in which a gas burner will bring them to a temperature of about 800 ° C to destroy the toxic compounds.
- Rebalanced mixture of olivine and silica 4 is introduced into the oven via a tube vibrating 30a for dosing the flow of the mixture injected.
- This mixture 4 is then suspended and stirred thanks to the fluidization boxes 27.
- the ramps of burners then ensure the burning of resins coating the sand grains contained in the mixture 4 suspended in the oven at a temperature about 650 ° C.
- the sand progresses in the oven during a time of treatment that the person skilled in the art can determine and who is preferably between 10 minutes and two hours then the sand is discharged to a cooler 32 by overflow.
- the cooler 32 consists of two boxes not shown comprising a tubular exchanger not represented fed by water itself cooled in a cooling tower.
- the cooler 32 also has a bed not shown fluidized which ensures the mixing of the sand in the cooling boxes.
- the temperature maximum of the rebalanced mixture of olivine and silica 7 is about 40 ° C and this mixture 7 is evacuated by overflow.
- the rebalanced mixture olivine and silica 7 from the operation of heat treatment 6 undergoes the second sorting step magnetic 8 implemented by a second machine of magnetic sorting 33.
- the mixture 4 undergoes a first step of magnetic separation 34 followed by a second step of magnetic separation 35.
- the first step of magnetic separation 34 is to recover the particles strongly 12 to facilitate the second step of magnetic separation 35.
- a first separation machine magnetic device 36 is constituted by a first drum in rotation comprising a metal casing to inside which magnets are arranged permanent rare earths.
- the rebalanced mixture of olivine and silica 7 is brought to the first rotating drum 36 by a vibrating carpet 37 surmounted by a squeegee adjustable in height 38 to distribute evenly the sand on the carpet 37.
- the mixture 7 is driven by the drum 36 and a adjustable tilt flap 40 disposed downstream of the drum 36 makes it possible to recover the particles strongly magnetic 12 and a particulate depleted mixture strongly metallic 39.
- This mixture 39 is brought to a second drum rotating power 41 by a vibrating belt 42.
- Three adjustable tilt flaps 43, 44 and 45 are arranged downstream of the second rotating drum 41 in order to recover strongly magnetic particles residual 12, the regenerated mixture of silica 11 containing more than 70% silica and may be used as hanging sand, the mixture of silica and of olivine 10 to undergo again the second magnetic sorting step 33 and mixing regenerated to olivine 9 containing more than 90% olivine.
- This regenerated mixture of olivine 9 can then be used as contact sand to make a piece metal requiring contact sand as sand other than silica.
- the power magnets of the two drums 36, 41 is preferably greater than that of the magnets arranged in these two drums 16, 21 of the first sorting machine 13.
- the separation process of the invention can in particular to apply to the manufacture of large cast steel dimensions such as the hearts of tracks most often made in a 13% steel manganese.
- the present invention is not limited to the modes described above and in particular, the person skilled in the art will be able to implement any machine of magnetic separation to achieve the first 2 and second 8 stages of magnetic sorting and everything heat treatment device to carry to a temperature above 400 ° C the rebalanced mixture olivine and silica 4 from the first stage of magnetic sorting 2.
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- Silicon Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Processing Of Solid Wastes (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
Description
- le mélange enrichi en silice 3, et
- le mélange rééquilibré en silice et en olivine 4.
- le mélange régénéré en silice 11,
- le mélange régénéré en olivine 9, et
- le mélange d'olivine et de silice 10.
- une machine de tri magnétique 13, 33, et
- une enceinte de traitement thermique 25.
- une première machine de tri magnétique 13,
- une enceinte de traitement thermique 26, et
- une deuxième machine de tri magnétique 33.
- la figure 1 est un organigramme illustrant les principales étapes du procédé de l'invention,
- la figure 2 représente schématiquement les principaux constituants de la première machine de tri,
- la figure 3 représente schématiquement le four à lit fluidisé utilisé pour le traitement thermique, et
- la figure 4 représente schématiquement les principaux constituants de la deuxième machine de tri.
Claims (28)
- Procédé de séparation de silice et d'olivine dans un mélange en contenant (1), ledit procédé comportant au moins les étapes suivantes :a. une étape de tri magnétique (2,8); etb. une étape de traitement thermique (6),
- Procédé selon la revendication 1, comportant au moins les étapes suivantes :a. une première étape de tri magnétique (2) dudit mélange (1) de laquelle il résulte notamment un mélange rééquilibré en olivine et en silice (4) et un mélange enrichi en silice (3);b. une étape de traitement thermique (6) du mélange rééquilibré en olivine et en silice (4) issu de l'étape (a) ; etc. une deuxième étape de tri magnétique (8) du mélange (7) issu de l'étape (b) de laquelle il résulte notamment un mélange régénéré en olivine (9) et un mélange régénéré en silice (11).
- Procédé selon l'une quelconque des revendications précédentes, comportant au moins, dans l'ordre, les étapes suivantes :a. la première étape de tri magnétique (2);b. l'étape de traitement thermique (6) du premier mélange rééquilibré en olivine et en silice (4) obtenu à l'étape (a) ; etc. la deuxième étape de tri magnétique (8) du mélange (7) obtenu à l'étape (b).
- Procédé selon l'une quelconque des revendications précédentes, dans lequel le mélange contenant de la silice et de l'olivine (1) est issu de l'opération de décochage effectuée lors de la fabrication de pièces métalliques par moulage et contient entre 5 et 40% d'olivine, de la silice et des particules fortement magnétiques telles que des particules d'oxyde de fer.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel la première étape de tri magnétique (2) comporte au moins les étapes suivantes :(a1) une première étape de séparation magnétique (14) pour isoler des particules fortement magnétiques (5) du mélange contenant de l'olivine et de la silice (1); et(a2) une seconde étape de séparation magnétique (15) du mélange appauvri en particules fortement magnétiques (19) obtenu à l'étape (a1) pour éliminer les particules fortement magnétiques résiduelles (5) et obtenir :le mélange enrichi en silice (3), etle mélange rééquilibré en olivine et en silice (4).
- Procédé selon l'une quelconque des revendications précédentes, dans lequel le mélange enrichi en silice (3) est recyclé et utilisé comme sable de remplissage.
- Procédé selon l'une quelconque des revendications 4 à 6, dans lequel le mélange rééquilibré en olivine et en silice (4) contient approximativement 50% de silice et 50% d'olivine.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel l'étape de traitement thermique (6) consiste à soumettre le mélange rééquilibré en olivine et en silice (4) à une température supérieure à 400 °C.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel l'étape de traitement thermique (6) consiste à traiter le mélange rééquilibré en olivine et en silice (4) dans un four à lit fluidisé (25) à une température d'approximativement 650°C.
- Procédé selon la revendication 9, dans lequel le mélange rééquilibré en olivine et en silice (4) est refroidi à une température inférieure à 50°C.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel la deuxième étape de tri magnétique (8) comporte au moins les étapes suivantes :(c1) une première étape de séparation magnétique (34) pour séparer les particules fortement magnétiques (12) du mélange (7) issu de l'étape de traitement thermique (6); et(c2) une deuxième étape de séparation magnétique (35) du mélange appauvri en particules fortement magnétiques (39) obtenu à l'étape (c1) pour éliminer les particules fortement magnétiques résiduelles (12) et obtenir :le mélange régénéré en silice (11),le mélange régénéré en olivine (9), etle mélange d'olivine et de silice (10).
- Procédé selon la revendication 11, dans lequel le mélange régénéré en silice (11) peut être utilisé comme sable d'accrochage.
- Procédé selon l'une des revendications précédentes, caractérisé en ce que le mélange régénéré en olivine (9) contient plus de 90% d'olivine et peut être utilisé comme sable de contact.
- Procédé selon l'une quelconque des revendications 12 et 13, dans lequel le mélange de silice et d'olivine (10) obtenu à l'étape (c2) subit de nouveau la deuxième étape de tri magnétique (8).
- Dispositif pour séparer la silice de l'olivine dans un mélange (1) en contenant, comprenant au moins:une machine de tri magnétique (13, 33), etune enceinte de traitement thermique (25).
- Dispositif selon la revendication 15, comprenant au moins :une première machine de tri magnétique (13),une enceinte de traitement thermique (26), etune deuxième machine de tri magnétique (33).
- Dispositif selon la revendication 16, dans lequel la première machine de tri magnétique (13), l'enceinte de traitement thermique (25) et la deuxième machine de tri (33) sont disposées dans cet ordre et en série.
- Dispositif selon l'une quelconque des revendications 16 et 17, dans lequel la première machine de tri magnétique (13) comporte un premier séparateur magnétique (16) réglé pour séparer les particules fortement magnétiques (12) du mélange contenant de l'olivine et de la silice (1) et un deuxième séparateur magnétique (21) pour séparer, du mélange appauvri en particules fortement magnétiques (12), les particules fortement magnétiques résiduelles (12) et obtenir un mélange enrichi en silice (3) et un mélange rééquilibré en olivine et en silice (4).
- Dispositif selon la revendication 18, dans lequel les premier (16) et second (21) séparateurs magnétiques sont constitués par des premier (16) et second (21) tambours métalliques aimantés en rotation sur lesquels le mélange à séparer (1, 19) circule à une vitesse appropriée et par un ou plusieurs volets d'inclinaison réglable (20, 23, 24) disposés en aval des tambours (16,21) de façon à séparer les différents jets de sable projetés par les tambours (16,21) et correspondants respectivement aux particules fortement magnétiques (5), au mélange enrichi en silice (3) et au mélange rééquilibré en olivine et en silice (4).
- Dispositif selon la revendication 19, dans lequel un volet (20) est disposé en aval du premier tambour magnétique (16) et est disposé de façon à séparer du mélange contenant de l'olivine et de la silice (1) les particules fortement magnétiques (5).
- Dispositif selon l'une quelconque des revendications 19 et 20, dans lequel deux volets sont disposés en aval du deuxième tambour (21) et sont disposés de façon à séparer sélectivement, du mélange appauvri en particules fortement magnétiques (19), les particules fortement magnétiques résiduelles (5), le mélange enrichi en silice (3), et le mélange rééquilibré en olivine et en silice (4).
- Dispositif selon l'une quelconque des revendications 15 à 21, dans lequel l'enceinte de traitement thermique (25) est constituée par un four à lit fluidisé dans lequel le mélange rééquilibré en olivine et du silice (4) progresse dans le four par la fluidisation à une température d'environ 650°C.
- Dispositif selon la revendication 22, comprenant un refroidisseur (32) disposé en aval du four permettant de porter le mélange rééquilibré en olivine et en silice (4) à une température inférieure à 50°C.
- Dispositif selon l'une quelconque des revendications 16 à 23, dans lequel la seconde machine de tri magnétique (33) comporte un premier séparateur magnétique (36) réglé pour séparer les particules fortement magnétiques (12) du mélange issu du traitement thermique (7) et un deuxième séparateur magnétique (41) réglé pour séparer, de ce mélange appauvri en particules fortement magnétiques (39), les particules fortement magnétiques résiduelles (12), le mélange régénéré en silice (11), le mélange régénéré en olivine (9) et un mélange d'olivine et de silice (10).
- Dispositif selon l'une quelconque des revendications 18 à 24, dans lequel les premier et second séparateurs magnétiques (36,41) sont constitués par des premier (36) et second (41) tambours métalliques aimantés en rotation sur lesquels le mélange à séparer (7,39) circule à une vitesse appropriée et par un plusieurs volets d'inclinaison réglable (40, 43, 44, 45) disposés en aval des tambours (36,41) de façon à séparer les différents jets de sable projetés par les tambours (36,41) et correspondants respectivement aux particules fortement magnétiques (12), au mélange régénéré en silice (11), au mélange régénéré en olivine (9) et au mélange d'olivine et de silice (10).
- Dispositif selon la revendication 25 dans lequel un volet (40) est disposé en aval du premier tambour magnétique (36) et est réglé de façon à séparer du mélange issu du traitement thermique (7) circulant sur le premier tambour les particules fortement magnétiques (12).
- Dispositif selon l'une quelconque des revendications 25 et 26, dans lequel trois volets (43, 44, 45) sont disposés en aval du deuxième tambour (41) et sont réglés de façon à séparer sélectivement du mélange appauvri en particules fortement magnétiques (39) circulant sur le deuxième tambour (41) les particules fortement magnétiques résiduelles (12), le mélange régénéré en silice (11), le mélange régénéré en olivine (9) et le mélange d'olivine et de silice (10).
- Dispositif selon l'une quelconque des revendications 24 à 27, comportant des moyens pour que le mélange d'olivine et de silice (10) soit introduit de nouveau dans la deuxième machine de tri magnétique (33).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0405413A FR2870467B1 (fr) | 2004-05-18 | 2004-05-18 | Procede de separation de silice et d'olivine dans un melange en contenant et dispositif de mise en oeuvre de ce procede |
FR0405413 | 2004-05-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1598114A1 true EP1598114A1 (fr) | 2005-11-23 |
EP1598114B1 EP1598114B1 (fr) | 2009-06-24 |
Family
ID=34942103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05290795A Not-in-force EP1598114B1 (fr) | 2004-05-18 | 2005-04-11 | Procédé de séparation de silice et d'olivine dans un mélange en contenant et dispositif de mise en oeuvre de ce procédé |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1598114B1 (fr) |
AT (1) | ATE434489T1 (fr) |
DE (1) | DE602005015055D1 (fr) |
FR (1) | FR2870467B1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB650223A (en) * | 1948-04-19 | 1951-02-21 | John Conrad Arnold | Production of magnesia |
GB2078703A (en) * | 1980-06-27 | 1982-01-13 | Steirische Magnesit Ind Ag | Producing active silica |
WO2002048036A1 (fr) * | 2000-11-02 | 2002-06-20 | Silica Tech Ans | Extraction de composes de silice et de magnesium a partir d'olivine |
-
2004
- 2004-05-18 FR FR0405413A patent/FR2870467B1/fr not_active Expired - Fee Related
-
2005
- 2005-04-11 DE DE602005015055T patent/DE602005015055D1/de not_active Expired - Fee Related
- 2005-04-11 AT AT05290795T patent/ATE434489T1/de not_active IP Right Cessation
- 2005-04-11 EP EP05290795A patent/EP1598114B1/fr not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB650223A (en) * | 1948-04-19 | 1951-02-21 | John Conrad Arnold | Production of magnesia |
GB2078703A (en) * | 1980-06-27 | 1982-01-13 | Steirische Magnesit Ind Ag | Producing active silica |
WO2002048036A1 (fr) * | 2000-11-02 | 2002-06-20 | Silica Tech Ans | Extraction de composes de silice et de magnesium a partir d'olivine |
Also Published As
Publication number | Publication date |
---|---|
FR2870467A1 (fr) | 2005-11-25 |
EP1598114B1 (fr) | 2009-06-24 |
DE602005015055D1 (de) | 2009-08-06 |
ATE434489T1 (de) | 2009-07-15 |
FR2870467B1 (fr) | 2006-07-21 |
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