US3400818A - Froth flotation - Google Patents

Froth flotation Download PDF

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Publication number
US3400818A
US3400818A US579717A US57971766A US3400818A US 3400818 A US3400818 A US 3400818A US 579717 A US579717 A US 579717A US 57971766 A US57971766 A US 57971766A US 3400818 A US3400818 A US 3400818A
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United States
Prior art keywords
slurry
vortex
tank
froth
air
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.)
Expired - Lifetime
Application number
US579717A
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English (en)
Inventor
Tarjan Gusztav
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Simonacco Ltd
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Simonacco Ltd
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Publication date
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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
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1418—Flotation machines using centrifugal forces
    • 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
    • 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
    • B03D1/1456—Feed mechanisms for the slurry
    • 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
    • B03D1/1462—Discharge mechanisms for the froth
    • 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
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
    • 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
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/75—Flowing liquid aspirates gas

Definitions

  • the invention provides apparatus adapted for use in material separation by froth flotation comprising a container in which separation takes place in the operation of the apparatus, and a vortex inducer unit; the arrangement being such that in the operation of the apparatus a slurry of material to be separated is fed to the unit and a vortex is induced in the slurry which is then discharged from the unit to the container.
  • the invention also provides apparatus adapted for use in material separation by froth flotation comprising a container in which separation takes place in the operation of the apparatus, and a vortex inducer unit mounted in the container; the arrangement being such that in the operation of the apparatus the container contains a slurry of material being separated, a slurry of material to be separated is fed to the unit and a vortex is induced in the slurry which vortex acts to disperse air in the slurry which is then discharged from the unit to the container below the liquid level in the container.
  • the invention also provides apparatus adapted for use in material separation by froth flotation comprising a container in which separation takes place in the operation of the apparatus, and a plurality of separate slurry flow systems each of which comprises a vortex inducer unit mounted in the container; the arrangement being such that in the operation of the apparatus the container contains a slurry of material being separated, a slurry of raw material to be separated is fed to the vortex inducer unit of one system and a vortex is induced in the slurry which is then discharged from an outlet of the unit to the container, and slurry from the container is fed to the vortex inducer unit of the other system and a vortex is induced in said slurry which is then discharged from an outlet of the unit to the container.
  • the invention also provides apparatus adapted for use in material separation by froth flotation comprising a container in which separation takes place in the operation of the apparatus, and a plurality of separate slurry flow systems each of which comprises a vortex inducer unit mounted in the container; the arrangement being such that in the operation of the apparatus the container contains a slurry of material being separated, a slurry of raw material .to be separated is fed to the vortex inducer unit of one system and a vortex is induced in the slurry which vortex acts to disperse air in the slurry which is then discharged from an outlet of the unit to the container, and slurry from the container is: fed to the vortex inducer unit of the other system and a vortex is induced in the slurry which vortex acts to disperse air in the slurry which is then discharged from an outlet. of the unit to the container.
  • the invention also provides a vortex inducer unit adapted for use in apparatus as set out in any one of the last preceding four paragraphs comprising a vortex chamber, a slurry inlet leading into the vortex chamber and a slurry outlet leading from the vortex chamber.
  • FIGURE 1 shows a diagrammatic side view of the apparatus
  • FIGURE 2 shows an end view corresponding to FIG- URE 1;
  • FIGURE 3 shows a side view of a vortex inducer unit of the apparatus
  • FIGURE 4 shows a plan view corresponding to FIG- URE 3.
  • FIGURE 5 shows a flow diagram of a modified form of the apparatus.
  • the apparatus is adapted for use in material separation by froth flotation; the material comprises, for example, coal and dirt, or a metallic ore.
  • the apparatus comprises a tank 20 in which separation takes place in the operation of the apparatus and which contains a body of slurry of material being separated, a plurality of generally submerged vortex inducer units 5, 18 mounted in the tank 20, two pumps 2, 15 and a feed tank 1; flow through the tank 20 in the operation of the apparatus is continuous and generally from left to right (FIGURE 1).
  • the apparatus comprises two separate slurry flow systems and the units 5 form part of a first system and the units 18 form part of the other, second, system.
  • an aqueous slurry of raw material to be separated enters the feed tank 1 and is pumped by the pump 2 along a line 3 which leads into feed conduits 4 of the units 5.
  • Frothing reagent and air are also supplied to the units 5; the units 5 act to emulsify the reagent in the slurry and disperse air in the slurry, froth being formed which rises to the top of the slurry in the tank 20 together with material rich in hydrophobic particles.
  • Slurry is recycled from a lower portion of tank 20 along a line 11 the inlet of which is located generally underneath the units 5 adjacent the units 5; the line 11 and thus its inlet are adjustable both vertically and longitudinally and also transversely; the line 11 leads through an adjustable valve 12 into the line 3 upstream of the pump 2.
  • Slurry feed for the units 18 is withdrawn from the lower portion of the tank 20 into a line 13 extending into the tank 20 and the inlet of which is located to right (FIG- URE 1) of the inlet of the line 11, and generally underneath the units 18 adjacent the units 18; the line 13 and thus its inlet are adjustable both vertically and longitudinally and also transversely; the line 13 leads through an adjustable valve 14 into the pump 15 which pumps the slurry along a line 16 which leads into feed conduits 17 of the units 18.
  • Frothing reagent and air are also supplied to the units 13; the units 18 act to emulsify the reagent and disperse air, froth being formed which rises to the top of the slurry in the tank 21 together with material rich in hydrophobic particles. The richness in hydrophobic particles of the material rising with the froth apparently decreases from left to right along the tank 2t).
  • the apparatus also comprises chutes 8, 9 to either side (FIGURE 2) of the tank and paddle wheels 7 arranged to rotate to deliver froth together with the material rich in hydrophobic particles into chutes 8, 9, the chutes 8 overlying the chutes
  • a Said froth together with said material is delivered into the chutes 8, generally to the left of the units 18 and passes from the chutes 8 to a dewatering device (not shown) of known type where the froth is separated from the material rich in hydrophobic particles; said material then leaves the dewatering device as the product of the apparatus.
  • Froth together with the material rich in hydrophobic particles is delivered into the chutes 9, to the right of the units 5 and is recycled into the line 3 upstream of the pump 2 through a line 10.
  • a slurry of tailings efiiuent which is rich in hydrophilic particles leaves the tank 20 through a line 19a which leads from the bottom of the tank 20; tailings efiiuent slurry also leaves the tank over a weir plate 22, which controls the level in the tank 20, and then through a line 1% which follows the weir plate 22.
  • Each vortex inducer unit 5, 18 (FIGURES 3 and 4) comprises a vertical circular cylindrical inner wall 29 which extends downwardly to a downwardly converging frustoconical inner wall which terminates in a lower circular axial orifice 28; the upper end of the cylindrical wall 29 is closed by a horizontal circular wall 46; the walls 29, 30, provide an inner vortex chamber 43 and the orifice 28 provides a slurry outlet leading from the chamber 4-3.
  • Surrounding the walls 29, 30, 49 are similar, outer, walls 31, 33, 42 respectively; a generally annular chamber 44 is thus provided surrounding the chamber 43 and an axial annular outlet orifice 46 is provided surrounding the orifice 28.
  • the feed conduit 4 or 17 of the vortex inducer unit terminates in a horizontal tangential inlet 23 which leads through the walls 31, 29 into the chamber 43; an injector nozzle 24 is provided in the inlet 23 and the injector nozzle 24 terminates flush with the wall 29.
  • the walls 29, 30, 40, 31, 33, 42 are made of abrasion resistant material, e.g., cast basalt, synthetic plastics or rubber.
  • a line 26 leads from the atmosphere into the inlet 23 and comprises a horizontal end portion 27 which terminates adjacent a mouth 59 of the nozzle 24.
  • Two. lines 32 lead from the atmosphere through the wall 42 into the chamber 44.
  • the vortex inducer unit comprises a tube 25 comprising an upper end in communication with the atmosphere and a lower vertical end portion 48 which extends upwardly towards the orifice 28 and is co-axial with the orifice 28; the end portion 48 has an open end facing the orifice 28.
  • slurry is fed continuously into the chamber 43 through the inlet 23 air being sucked in with the slurry from the line 26 by the action of the nozzle 24. It appears that a vortex is induced in the slurry in the chamber 43 and disperses air into fine bubbles dispersed in the slurry; the mixture of slurry and air is discharged at high speed from the orifice 28 below the liquid level in the tank 20 back into a lower portion of the body of slurry in the tank 20; also air is sucked through the lines 32, chamber 44 and orifice 46 by the mixture leaving the orifice 28, and air is sucked through the line 25.
  • the frothing reagent is fed through the line 25. It appears that the slurry leaving the vortex inducer units acts to agitate and mix the slurry in the tank 20.
  • a set of three vortex inducer units of a first flow system are connected to a feed line 130 in parallel and a group of nine vortex inducer units 118 of a second flow system are connected to a feed line 116 in parallel, being arranged in three sets of three; the units of each set of three vortex inducer units 165, 118 are at the same longitudinal position in a tank 112, but the four sets are arranged at different longitudinal positions along the tank 112; otherwise the modified form of the apparatus resembles the apparatus described with reference to FIGURES 1 to 4.
  • Tailings effluent from the line 19a is recycled to the line 3;
  • Froth flotation apparatus comprising a container enclosing a single space for receiving a slurry of material being separated, a plurality of separate flow systems each of which comprises, mounted in the container, static means for inducing a vortex in said slurry to disperse air therein, said static means having discharge means for then discharging said aerated slurry into said single space, means for supplying air to said vortex inducing means for dispersal in said slurry by said vortex, means for feeding a slurry of raw material to be separated from a source external of said tank directly into the vortex inducing means of at least one system, and pump and conduit means in each said flow system for feeding slurry from the container into the respective vortex inducing means of each said flow system, said conduit means having inlet means located in the lower portion of said container below and adjacent said discharge means of said respective vortex inducing means.
  • said static means comprises a vortex inducer unit, said unit comprising means forming a vortex chamber, a slurry inlet leading into the vortex chamber and a slurry outlet leading from the vortex chamber, the air supplying means leading into the inlet.
  • said static means comprises a vortex inducer unit, said unit comprising means forming a vortex chamber, a slurry inlet leading into the vortex chamber, and a slurry outlet leading from the vortex chamber, the air supplying means comprising a tube having an open end facing the slurry outlet of the vortex chamber and in communication with the atmosphere at its other end.
  • Froth flotation apparatus comprising a container adapted to contain a slurry of material being separated, a plurality of separate flow systems each of which comprises, mounted in the container, static means for inducing a vortex in a slurry of material to be separated to disperse air in the slurry and for then discharging said slurry to the container, means for supplying air to said vortex inducing means for dispersal in said slurry by said vortex, means for feeding a slurry of raw material to be separated into the vortex inducing means of at least one system, and means for feeding slurry from the container into the vortex inducing means of at least one other system, said static means comprising a vortex inducing unit, said unit comprising means forming a vortex chamber, a slurry inlet leading into the vortex chamber and an axial slurry outlet orifice leading from the vortex chamber, the air supplying means forming an annular chamber surrounding the vortex chamber and having an axial annular outlet orifice surrounding

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  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
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US579717A 1965-09-28 1966-09-15 Froth flotation Expired - Lifetime US3400818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUTA000866 1965-09-28

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US3400818A true US3400818A (en) 1968-09-10

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US (1) US3400818A (enrdf_load_stackoverflow)
BE (1) BE679910A (enrdf_load_stackoverflow)
DE (1) DE1296582B (enrdf_load_stackoverflow)
ES (1) ES331446A1 (enrdf_load_stackoverflow)
GB (1) GB1144463A (enrdf_load_stackoverflow)
SE (1) SE309760B (enrdf_load_stackoverflow)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647066A (en) * 1969-06-13 1972-03-07 Galigher Co Flotation machine and system utilizing impeller-type aeration units
US3677525A (en) * 1969-12-31 1972-07-18 Sonic Dev Corp Pressure wave atomizing apparatus
US3799511A (en) * 1971-02-09 1974-03-26 Electrolux Ab Method of forming a solution of gas and liquid introducing such solution into a body of liquid
US4212730A (en) * 1978-03-17 1980-07-15 Brooks George C Apparatus for separating and classifying diverse, liquid-suspended solids
US4220612A (en) * 1979-04-23 1980-09-02 Envirotech Corporation Flotation cell feed duct
US4226706A (en) * 1979-08-09 1980-10-07 Envirotech Corporation Dispersed air flotation machine
US4252780A (en) * 1978-05-11 1981-02-24 Wacker-Chemitronic Gesellschaft Fur Elektronik Grundstoffe Mbh Process for working up hydrolyzable and/or water-soluble compounds
US4347126A (en) * 1981-01-29 1982-08-31 Gulf & Western Manufacturing Company Apparatus and method for flotation separation utilizing a spray nozzle
US4347127A (en) * 1981-01-29 1982-08-31 Gulf & Western Manufacturing Company Apparatus and method for froth flotation separation of the components of a slurry
US4406664A (en) * 1980-01-22 1983-09-27 Gulf & Western Industries, Inc. Process for the enhanced separation of impurities from coal and coal products produced therefrom
US4412843A (en) * 1980-01-22 1983-11-01 Gulf & Western Industries, Inc. Beneficiated coal, coal mixtures and processes for the production thereof
US4436617A (en) 1982-07-22 1984-03-13 Cocal, Inc. Froth flotation ore beneficiation process utilizing enhanced gasification and flow techniques
EP0090234A3 (en) * 1982-03-31 1985-06-26 J.M. Voith Gmbh Injector for a flotation apparatus
US4526585A (en) * 1981-05-28 1985-07-02 The Standard Oil Company Beneficiated coal, coal mixtures and processes for the production thereof
US4564369A (en) * 1981-05-28 1986-01-14 The Standard Oil Company Apparatus for the enhanced separation of impurities from coal
US4606822A (en) * 1984-11-01 1986-08-19 Miller Francis G Vortex chamber aerator
US4613430A (en) * 1984-01-30 1986-09-23 Miller Francis G Froth flotation separation method and apparatus
US4613431A (en) * 1984-01-30 1986-09-23 Miller Francis G Froth flotation separation apparatus
US4639340A (en) * 1984-01-24 1987-01-27 The Boc Group Plc Dissolving gas in a liquid
US4664680A (en) * 1986-04-07 1987-05-12 Atec Inc. Method and system for enriching oxygen content of water
US4738783A (en) * 1986-07-03 1988-04-19 Kazutoyo Sugihara Flotation cyclone device
US4766001A (en) * 1986-04-15 1988-08-23 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for treating a food liquid with a gas
US4867918A (en) * 1987-12-30 1989-09-19 Union Carbide Corporation Gas dispersion process and system
US4931225A (en) * 1987-12-30 1990-06-05 Union Carbide Industrial Gases Technology Corporation Method and apparatus for dispersing a gas into a liquid
US5049320A (en) * 1990-07-03 1991-09-17 International Environmental Systems, Inc. Gas dissolving system and method
US5059309A (en) * 1990-06-21 1991-10-22 The United States Of America As Represented By The Secretary Of The Interior Ultrasonic flotation system
US5102104A (en) * 1990-03-05 1992-04-07 U.S. Gold Corporation Biological conversion apparatus
AU625526B2 (en) * 1990-09-19 1992-07-16 Yakutsky Nauchno-Issledovatelsky I Proektny Institut Almazodobyvajuschei Promyshlennosti Flotation machine
AU625648B2 (en) * 1990-09-19 1992-07-16 Yakutsky Nauchno-isseldovatelsky I Proektny Institut Almazododyvajuschei Promyshlennosti Flotation machine
US5143543A (en) * 1991-08-23 1992-09-01 U.S. Gold Corporation Biological conversion method
US5240600A (en) * 1990-07-03 1993-08-31 International Environmental Systems, Inc., Usa Water and wastewater treatment system
US5350543A (en) * 1992-05-14 1994-09-27 Spradley William E Method and apparatus for aerating an aqueous solution
US6562240B1 (en) * 1997-08-29 2003-05-13 Separation Technologies Group Pty. Ltd. Mixing apparatus
US6565070B2 (en) 1991-12-02 2003-05-20 Robin John Batterham Reactor
US20030209471A1 (en) * 2002-03-27 2003-11-13 Helmuth Gabl Device for separating solids from liquids by means of flotation
US6763947B1 (en) * 2003-10-27 2004-07-20 George C. Brooks Flotation separation apparatus and infuser therefor
US20090065957A1 (en) * 2005-04-15 2009-03-12 Chien-Pei Mao Integrated fuel injection and mixing systems for fuel reformers and methods of using the same
CN115193591A (zh) * 2022-09-14 2022-10-18 北矿机电科技有限责任公司 环保型浮选系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2966457D1 (en) * 1979-01-10 1984-01-12 Chevron Res Staged froth flotation with intermediate recycle
DE3242058A1 (de) * 1982-11-13 1984-05-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und vorrichtung zur aufbereitung von feinstkohle
DE3245847C1 (de) * 1982-12-10 1984-11-08 E. & M. Lamort S.A., Vitry-le-François, Marne Vorrichtung zum Flottieren von Suspensionen
RU2187381C1 (ru) * 2001-06-04 2002-08-20 Иркутский государственный технический университет Аэратор

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US2767965A (en) * 1950-11-03 1956-10-23 Mining Process & Patent Co Dual pumping agitation
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US2931502A (en) * 1956-07-02 1960-04-05 Saskatchewan Potash Method for flotation concentration in coarse size range
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US2020850A (en) * 1933-12-15 1935-11-12 New Jersey Zinc Co Apparatus for mixing liquids and gases
US2142207A (en) * 1935-10-29 1939-01-03 Colorado Fuel & Iron Corp Flotation process
US2350943A (en) * 1940-03-02 1944-06-06 Galigher Company Countercurrent froth flow flotation system
US2653801A (en) * 1950-10-13 1953-09-29 Stamicarbon Process and apparatus for dispersing a substance in a liquid
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US2883169A (en) * 1955-04-29 1959-04-21 Mining Process & Patent Co Aerating apparatus for flotation pulps
US2931502A (en) * 1956-07-02 1960-04-05 Saskatchewan Potash Method for flotation concentration in coarse size range
US3050188A (en) * 1959-03-12 1962-08-21 Voith Gmbh J M Flotation machine
GB965706A (en) * 1961-11-13 1964-08-06 Heyl & Patterson Froth flotation process and apparatus
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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647066A (en) * 1969-06-13 1972-03-07 Galigher Co Flotation machine and system utilizing impeller-type aeration units
US3677525A (en) * 1969-12-31 1972-07-18 Sonic Dev Corp Pressure wave atomizing apparatus
US3799511A (en) * 1971-02-09 1974-03-26 Electrolux Ab Method of forming a solution of gas and liquid introducing such solution into a body of liquid
US4212730A (en) * 1978-03-17 1980-07-15 Brooks George C Apparatus for separating and classifying diverse, liquid-suspended solids
US4252780A (en) * 1978-05-11 1981-02-24 Wacker-Chemitronic Gesellschaft Fur Elektronik Grundstoffe Mbh Process for working up hydrolyzable and/or water-soluble compounds
US4220612A (en) * 1979-04-23 1980-09-02 Envirotech Corporation Flotation cell feed duct
US4226706A (en) * 1979-08-09 1980-10-07 Envirotech Corporation Dispersed air flotation machine
US4412843A (en) * 1980-01-22 1983-11-01 Gulf & Western Industries, Inc. Beneficiated coal, coal mixtures and processes for the production thereof
US4406664A (en) * 1980-01-22 1983-09-27 Gulf & Western Industries, Inc. Process for the enhanced separation of impurities from coal and coal products produced therefrom
US4347126A (en) * 1981-01-29 1982-08-31 Gulf & Western Manufacturing Company Apparatus and method for flotation separation utilizing a spray nozzle
US4347127A (en) * 1981-01-29 1982-08-31 Gulf & Western Manufacturing Company Apparatus and method for froth flotation separation of the components of a slurry
US4564369A (en) * 1981-05-28 1986-01-14 The Standard Oil Company Apparatus for the enhanced separation of impurities from coal
US4526585A (en) * 1981-05-28 1985-07-02 The Standard Oil Company Beneficiated coal, coal mixtures and processes for the production thereof
EP0090234A3 (en) * 1982-03-31 1985-06-26 J.M. Voith Gmbh Injector for a flotation apparatus
US4436617A (en) 1982-07-22 1984-03-13 Cocal, Inc. Froth flotation ore beneficiation process utilizing enhanced gasification and flow techniques
US4639340A (en) * 1984-01-24 1987-01-27 The Boc Group Plc Dissolving gas in a liquid
US4613430A (en) * 1984-01-30 1986-09-23 Miller Francis G Froth flotation separation method and apparatus
US4613431A (en) * 1984-01-30 1986-09-23 Miller Francis G Froth flotation separation apparatus
US4606822A (en) * 1984-11-01 1986-08-19 Miller Francis G Vortex chamber aerator
US4664680A (en) * 1986-04-07 1987-05-12 Atec Inc. Method and system for enriching oxygen content of water
US4766001A (en) * 1986-04-15 1988-08-23 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for treating a food liquid with a gas
US4738783A (en) * 1986-07-03 1988-04-19 Kazutoyo Sugihara Flotation cyclone device
US4931225A (en) * 1987-12-30 1990-06-05 Union Carbide Industrial Gases Technology Corporation Method and apparatus for dispersing a gas into a liquid
US4867918A (en) * 1987-12-30 1989-09-19 Union Carbide Corporation Gas dispersion process and system
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Also Published As

Publication number Publication date
DE1296582B (de) 1969-06-04
ES331446A1 (es) 1967-11-01
SE309760B (enrdf_load_stackoverflow) 1969-04-08
BE679910A (enrdf_load_stackoverflow) 1966-10-03
GB1144463A (en) 1969-03-05

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