WO1986003142A1 - Perfectionnement apporte a la separation et a la recuperation de solides a partir de liquides les contenant et faisant appel au procede de flottation ionique, et moyen pour la mise en oeuvre de ce perfectionnement - Google Patents
Perfectionnement apporte a la separation et a la recuperation de solides a partir de liquides les contenant et faisant appel au procede de flottation ionique, et moyen pour la mise en oeuvre de ce perfectionnement Download PDFInfo
- Publication number
- WO1986003142A1 WO1986003142A1 PCT/FR1985/000163 FR8500163W WO8603142A1 WO 1986003142 A1 WO1986003142 A1 WO 1986003142A1 FR 8500163 W FR8500163 W FR 8500163W WO 8603142 A1 WO8603142 A1 WO 8603142A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solid
- recovery
- improvement
- flotation
- liquid
- Prior art date
Links
- 238000005188 flotation Methods 0.000 title claims abstract description 39
- 239000007787 solid Substances 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 13
- 230000006872 improvement Effects 0.000 title claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 11
- 238000009825 accumulation Methods 0.000 claims abstract description 3
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 claims abstract 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 17
- 229910052793 cadmium Inorganic materials 0.000 claims description 16
- 229910052770 Uranium Inorganic materials 0.000 claims description 15
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 15
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 12
- 239000007791 liquid phase Substances 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 14
- 239000002244 precipitate Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 230000008030 elimination Effects 0.000 description 6
- 238000003379 elimination reaction Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 241000555745 Sciuridae Species 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- -1 alkyl xanthate Chemical compound 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229960001950 benzethonium chloride Drugs 0.000 description 1
- UREZNYTWGJKWBI-UHFFFAOYSA-M benzethonium chloride Chemical compound [Cl-].C1=CC(C(C)(C)CC(C)(C)C)=CC=C1OCCOCC[N+](C)(C)CC1=CC=CC=C1 UREZNYTWGJKWBI-UHFFFAOYSA-M 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- RBNPZEHAODHBPZ-UHFFFAOYSA-M dihydroxyaluminium Chemical compound O.O.NCC(=O)O[Al] RBNPZEHAODHBPZ-UHFFFAOYSA-M 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- ZKDDJTYSFCWVGS-UHFFFAOYSA-M sodium;diethoxy-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Na+].CCOP([S-])(=S)OCC ZKDDJTYSFCWVGS-UHFFFAOYSA-M 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229910000384 uranyl sulfate Inorganic materials 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
- B03D1/1475—Flotation tanks having means for discharging the pulp, e.g. as a bleed stream
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/24—Pneumatic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/911—Cumulative poison
- Y10S210/912—Heavy metal
Definitions
- the present invention relates to an improvement brought about in the separation and the recovery of solids from liquids containing them and using the ion flotation process.
- the invention also relates to the means for implementing this improvement.
- Ion flotation is a known technique aimed at eliminating certain ions, in particular metal cations, from a solution containing them.
- This technique consists in introducing into the solution to be treated, a surfactant, called a collector, the role of which is to complex and insolubilize the ion which one wishes to separate and to entrain, within this liquid, in an upward movement, said complex on the surface of this liquid and to recover it on this surface.
- the present invention aims to overcome these drawbacks and to provide a simple and economical method and means allowing:
- the Applicant has unexpectedly found that by subjecting a fraction of the liquid to be treated containing the solid to be recovered to a process consisting in admitting this fraction into a device adapted to lower its pressure, in bringing the resulting flow into contact with a gas admitted into this flow at very high speed and at low incidence, in bringing the two fluids together under conditions of expansion for make a fine emulsion and take up said emulsion by raising the pressure while maintaining the resulting pressure at a level lower than that corresponding to the initial pressure of the admitted liquid, and injecting said emulsion into a volume of the liquid to be treated, we obtained on the surface of this volume, and in a quiet zone, an accumulation of the desired solid practically free from the initial liquid phase.
- liquid to be treated is meant any suspension of the "collector-ion" precipitate in the liquid phase.
- the ability of the solid to float is not altered by modification, for example of its particle size, neither during its passage through the device nor by untimely turbulence within the liquid mass. .
- the Applicant has found that the system applies particularly well when the liquid to be treated is a concentrated solution of a mineral acid such as for example phosphoric acid; the yield expressed as a percentage of the quantity of solid separated in a single operation turns out to be at least 307. in the case of the phosphoric medium.
- a mineral acid such as for example phosphoric acid
- the invention provides a recycling circuit in the system allowing total recovery of the desired solid.
- a pre-treatment tank for the solution to be treated this pre-treatment consisting in introducing into it a surfactant (collector) so as to form a suspension, this medium being maintained under stirring by means of an agitator 2 of any known type, and in 5 a flotation cell supplied with this suspension by any suitable means.
- This cell is then made to pass through a non-turbulent ascenti ⁇ nnel current intended to convey the solid towards the surface of the suspension, this current being obtained in the following way: by means of a pump 3, the medium coming from the tank 1 in an apparatus 4 of the type which is the subject, for example, of French patent 2,484,862 and comprising from upstream to downstream, a converging conduit for supplying said medium, a gas injection stage produced so that this gas be admitted at very high speed under a relatively low incidence; this injection stage is immediately followed by an expansion stage constituted by an enclosure whose walls are non-converging which opens into a clearly divergent zone in communication, possibly, with an enclosure for recovering and / or recycling the gas.
- the device 4 is shown placed at the base of the cell 5. It can just as advantageously be placed above the latter.
- a population of stable, fine, numerous bubbles is obtained which is capable of transporting the solid contained in cell 5 to the surface 5a of the liquid phase.
- This solid collects on this surface practically free of entrained liquid; it is recovered by any suitable means at 6 to be sent to a storage bin 7.
- the liquid medium is returned, via line 8, to the device 4 by the circuit designated by the references 9-10-11 , possibly using a pump 3a.
- the liquid medium is recovered in the recovery tank 12.
- the method and the device according to the invention are particularly advantageous for the recovery of elements such as uranium, zirconium. cadmium, arsenic, rare earths, etc. contained in wet phosphoric acid with minimum entrainment of said acid.
- Example 1 the method and the device according to the invention can be applied to a flotation cell of the type described in French patent 2,354,820 previously cited.
- a flotation cell of the type described in French patent 2,354,820 previously cited.
- Such a cell in which the original gas ejector is replaced by a device according to the invention can then operate under clearly different and more economical conditions than those for which it is designed.
- the following examples will better illustrate the scope and interest of the invention: Example 1
- the precipitation is carried out as in Example 1 by carrying out a pre-reduction of the uranium (before the introduction of the collector into the acid).
- the conditions of flotation of the precipitate are the same as in Example 2 with an R ratio equal to 4.2.
- the effectiveness of the device for the flotation of the precipitate is also excellent, of the order of 90% after one pass and 98% after recycling the acid solution for 5 minutes.
- the uranium content eliminated by this implementation of the process is thus greater than 85% after one pass and equal to 95% after 5 minutes of recycling.
- the acid treated is a wet industrial phosphoric acid containing 30% P 2 O 5 and containing approximately 40 mg / l as Cd and 115 mg / l as uranium.
- the flotation equipment used is commercial pilot equipment (WEMCO Depurator type) with four in-line cells of approximately 30 liters each; the device (4) of the appended figure is then positioned vertically above the liquid phase loaded with solid circulating in the cell, the outlet of the device being located below the surface of the liquid; the tests were carried out with only two of the cells. These two cells were equipped with the device according to the invention to replace the original ejector.
- the flotation conditions are as follows at the device (4):
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8585903006T DE3572604D1 (en) | 1984-11-30 | 1985-06-19 | Separation and recovery of solids from liquids using the ionic flotation process |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8418301A FR2574002B1 (fr) | 1984-11-30 | 1984-11-30 | Perfectionnement apporte a la separation et a la recuperation de solides a partir de liquides les contenant et faisant appel au procede de flottation ionique, et moyen pour la mise en oeuvre de ce perfectionnement |
| FR84/18301 | 1984-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1986003142A1 true WO1986003142A1 (fr) | 1986-06-05 |
Family
ID=9310119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1985/000163 WO1986003142A1 (fr) | 1984-11-30 | 1985-06-19 | Perfectionnement apporte a la separation et a la recuperation de solides a partir de liquides les contenant et faisant appel au procede de flottation ionique, et moyen pour la mise en oeuvre de ce perfectionnement |
Country Status (8)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0325976A3 (de) * | 1988-01-23 | 1991-06-26 | Allmineral Aufbereitungstechnik Gmbh & Co. Kg | Pneumatische Flotationszelle |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281339A (en) * | 1989-06-08 | 1994-01-25 | Ici Australia Operations Proprietary Limited | Removal of contaminants |
| US5320759A (en) * | 1992-06-11 | 1994-06-14 | Hazen Research, Inc. | Selective recovery of heavy metals using xanthates |
| US5244492A (en) * | 1992-06-26 | 1993-09-14 | Ppg Industries, Inc. | Process for recovery of metallic mercury from contaminated mercury-containing soil |
| US5820752A (en) * | 1995-08-10 | 1998-10-13 | Prestone Products Corporation | Methods and apparatus for recycling used antifreeze/coolant |
| US6890431B1 (en) * | 2000-02-18 | 2005-05-10 | The F. B. Leopold Co., Inc. | Buoyant media flotation |
| US6398968B1 (en) * | 2000-02-25 | 2002-06-04 | Watermark Technologies, Llc | Methods for pressure stabilized removal of contaminants from solution |
| US6562241B1 (en) * | 2000-11-10 | 2003-05-13 | Watermark Technologies, Llc | Methods for negative atmospheric pressure removal of arsenic and other metals |
| DE202010009140U1 (de) | 2010-06-16 | 2010-10-21 | Juan Valdivia Gmbh | Anordnung zur Erzeugung von Luftblasen in Flüssigkeiten |
| FR3146604A1 (fr) * | 2023-03-16 | 2024-09-20 | Universite Mohammed VI Polytechnique | Procédé de traitement de l’acide phosphorique par flottation ionique |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117082A (en) * | 1958-08-21 | 1964-01-07 | Pfaudler Permutit Inc | Flotation system |
| AT342528B (de) * | 1976-09-01 | 1978-04-10 | Envirotech Corp | Flotationsverfahren |
| EP0004953A2 (de) * | 1978-04-19 | 1979-10-31 | Klaus Prof. Dr. Heckmann | Verfahren und Vorrichtung zur selektiven Trennung des Urans von seinen Begleitmetallen und zu seiner Gewinnung |
| WO1980000423A1 (en) * | 1978-08-21 | 1980-03-20 | Feldmuehle Ag | Method and device for cleaning suspension fibres |
| GB2072650A (en) * | 1980-03-27 | 1981-10-07 | Universal Ges Yur Errichtung V | Method and device for converting and separating substances contained dissolved or in a carrier liquid |
| EP0037513A1 (de) * | 1980-04-09 | 1981-10-14 | Feldmühle Aktiengesellschaft | Flotationsvorrichtung zum Deinken von Faserstoffsuspensionen |
| FR2484862A1 (fr) * | 1980-06-18 | 1981-12-24 | Inst Nat Rech Chimique | Procede et dispositif pour le transfert de gaz dans un liquide applicable en particulier au traitement des eaux, en biotechnologie et dans l'industrie chimique |
| EP0059227A1 (de) * | 1981-02-26 | 1982-09-08 | Agfa-Gevaert AG | Flotationsverfahren zur kontinuierlichen Wiedergewinnung von Silber oder Silberverbindungen aus Lösungen oder Dispersionen |
| EP0099804A2 (fr) * | 1982-07-16 | 1984-02-01 | Association dite: INSTITUT MONDIAL DU PHOSPHATE | Perfectionnements apportés aux procédés de séparation de métaux contenus dans des milieux hyperacides, par flottation ionique |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE342528C (de) * | 1920-10-27 | 1921-10-19 | Walter Ortmann | Haekelschiffchen |
| US2793185A (en) * | 1952-12-17 | 1957-05-21 | Albrektsson John Oscar Georg | Method and apparatus for introduction of gas into water to be treated by flotation |
| US3179252A (en) * | 1961-01-06 | 1965-04-20 | Eimco Corp | Apparatus for flotation |
| US3243046A (en) * | 1962-12-01 | 1966-03-29 | Ebara Infilco | Floatation apparatus |
| US4160737A (en) * | 1973-12-22 | 1979-07-10 | Pielkenrood-Vinitex B.V. | Flotation and plate separation device |
| US3966598A (en) * | 1975-02-24 | 1976-06-29 | Tenco Hydro/Aerosciences, Inc. | Circular dissolved gas flotation system |
| JPS52116643A (en) * | 1976-03-26 | 1977-09-30 | Stanley Electric Co Ltd | Process for producing pressure water generating fine foam |
| US4094783A (en) * | 1977-09-29 | 1978-06-13 | Jackson George F | Centrifugal flotation separator |
| US4263148A (en) * | 1979-04-09 | 1981-04-21 | Earth Sciences, Inc. | Process for removing humic matter from phosphoric acid solutions |
| DE3008476A1 (de) * | 1980-03-05 | 1981-09-17 | Bayer Ag, 5090 Leverkusen | Verfahren zur flotation und verwendung von trichterduesen zur flotation |
| FR2557090B1 (fr) * | 1983-12-23 | 1986-04-11 | Pechiney Uranium | Procede de purification de l'acide phosphorique de voie humide par elimination du cadmium |
-
1984
- 1984-11-30 FR FR8418301A patent/FR2574002B1/fr not_active Expired
-
1985
- 1985-06-18 MA MA20685A patent/MA20458A1/fr unknown
- 1985-06-19 US US06/893,330 patent/US4844873A/en not_active Expired - Fee Related
- 1985-06-19 EP EP85903006A patent/EP0203076B1/fr not_active Expired
- 1985-06-19 JP JP60502741A patent/JPS62500918A/ja active Granted
- 1985-06-19 DE DE8585903006T patent/DE3572604D1/de not_active Expired
- 1985-06-19 WO PCT/FR1985/000163 patent/WO1986003142A1/fr active IP Right Grant
-
1986
- 1986-07-30 OA OA58913A patent/OA08372A/xx unknown
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117082A (en) * | 1958-08-21 | 1964-01-07 | Pfaudler Permutit Inc | Flotation system |
| AT342528B (de) * | 1976-09-01 | 1978-04-10 | Envirotech Corp | Flotationsverfahren |
| EP0004953A2 (de) * | 1978-04-19 | 1979-10-31 | Klaus Prof. Dr. Heckmann | Verfahren und Vorrichtung zur selektiven Trennung des Urans von seinen Begleitmetallen und zu seiner Gewinnung |
| WO1980000423A1 (en) * | 1978-08-21 | 1980-03-20 | Feldmuehle Ag | Method and device for cleaning suspension fibres |
| GB2072650A (en) * | 1980-03-27 | 1981-10-07 | Universal Ges Yur Errichtung V | Method and device for converting and separating substances contained dissolved or in a carrier liquid |
| EP0037513A1 (de) * | 1980-04-09 | 1981-10-14 | Feldmühle Aktiengesellschaft | Flotationsvorrichtung zum Deinken von Faserstoffsuspensionen |
| FR2484862A1 (fr) * | 1980-06-18 | 1981-12-24 | Inst Nat Rech Chimique | Procede et dispositif pour le transfert de gaz dans un liquide applicable en particulier au traitement des eaux, en biotechnologie et dans l'industrie chimique |
| EP0059227A1 (de) * | 1981-02-26 | 1982-09-08 | Agfa-Gevaert AG | Flotationsverfahren zur kontinuierlichen Wiedergewinnung von Silber oder Silberverbindungen aus Lösungen oder Dispersionen |
| EP0099804A2 (fr) * | 1982-07-16 | 1984-02-01 | Association dite: INSTITUT MONDIAL DU PHOSPHATE | Perfectionnements apportés aux procédés de séparation de métaux contenus dans des milieux hyperacides, par flottation ionique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0325976A3 (de) * | 1988-01-23 | 1991-06-26 | Allmineral Aufbereitungstechnik Gmbh & Co. Kg | Pneumatische Flotationszelle |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2574002B1 (fr) | 1987-02-27 |
| MA20458A1 (fr) | 1985-12-31 |
| JPS62500918A (ja) | 1987-04-16 |
| FR2574002A1 (fr) | 1986-06-06 |
| EP0203076A1 (fr) | 1986-12-03 |
| OA08372A (fr) | 1988-02-29 |
| JPH0242545B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1990-09-25 |
| US4844873A (en) | 1989-07-04 |
| DE3572604D1 (en) | 1989-10-05 |
| EP0203076B1 (fr) | 1989-08-30 |
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