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1. WO1985000021 - COLUMN FROTH FLOTATION

Publication Number WO/1985/000021
Publication Date 03.01.1985
International Application No. PCT/US1984/000926
International Filing Date 13.06.1984
IPC
B03D 1/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
02Froth-flotation processes
B03D 1/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
14Flotation machines
24pneumatic
CPC
B03D 1/02
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
02Froth-flotation processes
B03D 1/082
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
08Subsequent treatment of concentrated product
082of the froth product, e.g. washing
B03D 1/1481
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
14Flotation machines
1481with a plurality of parallel plates
B03D 1/24
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION 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
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
14Flotation machines
24Pneumatic
Applicants
  • BOARD OF CONTROL OF MICHIGAN TECHNOLOGICAL UNIVERS [US]/[US]
Inventors
  • YANG, David, C.
Agents
  • GEMIGNANI, Joseph, A.
Priority Data
504,79316.06.1983US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COLUMN FROTH FLOTATION
(FR) COLONNE DE FLOTTATION PAR ECUMAGE
Abstract
(EN)
The froth floatation device (10) includes a floatation column (12) partially filled with packing (24) which defines a large number of small flow passages extending in a circuitous pattern between the upper (14) and lower portions (16) of the column. A conditioned aqueous pulp of mineral ore, such as iron ore is introduced into the midzone of the column (12) through a pulp inlet (18). A pressurized inert gas such as air is introduced into the bottom of the column (12) through a gas inlet (22) and is forced upwardly through the flow passages in the packing (24). As the air flows upwardly through these flow passages, it is broken into fine bubbles which intimately contact the floatable particles (e.g. iron oxide) in the aqueous pulp and forms a froth concentrate (25) or float fraction which overflows from the top of the column (12) through an outlet (28). Wash water is introduced into the top of the column (12) through a water inlet (20) and flows through flow passages in the packing countercurrently to the float fraction to scrub entrainable non-floatable particles (e.g. gangue) from the froth concentrate (25). A tailing fraction (33) containing non-floatable particles is withdrawn from the bottom of the column (12) through an outlet (34).
(FR)
Le dispositif de flottation par écumage (10) comprend une colonne de flottation (12) partiellement remplie d'une garniture (24) qui définit un grand nombre de petits passages d'écoulement ayant la configuration d'un circuit entre les parties supérieure (14) et inférieure (16) de la colonne. Une pulpe aqueuse conditionnée de minerai, tel que du minerai de fer, est introduite dans la zone médiane de la colonne (12) au travers d'un orifice d'introduction de pulpe (18). Un gaz inerte sous pression, tel que de l'air, est introduit au fond de la colonne (12) au travers d'un orifice d'admission de gaz (22) et s'écoule de force vers le haut au travers des passages d'écoulement dans la garniture (24). Au fur et à mesure que l'air s'écoule vers le haut au travers de ces passages d'écoulement, il est séparé en de fines bulles qui entrent en contact étroit avec les particules flottables (par exemple l'oxyde de fer) dans la pulpe aqueuse pour former un concentré d'écume (25) ou fraction flottante qui déborde du sommet de la colonne (12) au travers d'un orifice de sortie (28). De l'eau de lavage est introduite par le sommet de la colonne (12) au travers d'un orifice d'admission d'eau (20) et s'écoule au travers des passages d'écoulement dans la garniture à contre-courant par rapport à la fraction flottante pour laver les particules non flottantes entraînables (par exemple la gangue) du concentré d'écume (25). Une fraction de queue (33) contenant des particules non flottantes est extraite du fond de la colonne (12) au travers d'un orifice de sortie (34).
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