Processing

Please wait...

Settings

Settings

1. WO2000043317 - RHEOLOGY MODIFICATION OF SETTLED SOLIDS IN MINERAL PROCESSING

Publication Number WO/2000/043317
Publication Date 27.07.2000
International Application No. PCT/US1999/028855
International Filing Date 06.12.1999
Chapter 2 Demand Filed 02.08.2000
IPC
B01F 7/16 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
7Mixers with rotary stirring devices in fixed receptacles; Kneaders
16with stirrers rotating about a vertical axis
B01F 15/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
15Accessories for mixers
02Feed or discharge mechanisms
C01F 7/06 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE EARTH METALS
7Compounds of aluminium
02Aluminium oxide; Aluminium hydroxide; Aluminates
04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
06by treating aluminous minerals with alkali hydroxide
CPC
B01F 15/0203
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
15Accessories for mixers ; ; Auxiliary operations or auxiliary devices; Parts or details of general application
02Feed or discharge mechanisms
0201Feed mechanisms
0203for feeding fluids
B01F 7/165
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
7Mixers with rotary stirring devices in fixed receptacles ; , i.e. movement of the receptacle not being meant to effect the mixing
16with stirrers rotating about a substantially vertical axis
165Pan-type mixers, i.e. mixers in which the stirring elements move along the bottom of a pan-shaped receptacle
C01F 7/0653
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
7Compounds of aluminium
02Aluminium oxide; Aluminium hydroxide; Aluminates
04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
06by treating aluminous minerals ; or waste-like raw materials; with alkali hydroxide ; , e.g. leaching of bauxite according to the Bayer process
0646Separation of the insoluble residue, e.g. red mud
0653characterised by the flocculant added to the slurry
C01F 7/066
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
7Compounds of aluminium
02Aluminium oxide; Aluminium hydroxide; Aluminates
04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
06by treating aluminous minerals ; or waste-like raw materials; with alkali hydroxide ; , e.g. leaching of bauxite according to the Bayer process
066Treatment of the separated residue
Applicants
  • NALCO CHEMICAL COMPANY [US/US]; One Nalco Center Naperville, IL 60563-1198, US
Inventors
  • BARHAM, Scott, Lewis; AU
  • HENDERSON, Raymond, Leslie; AU
Agents
  • KEEFER, Timothy, J.; Wildman, Harrold, Allen & Dixon 225 West Wacker Drive Chicago, IL 60606-1229, US
Priority Data
09/233,61819.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) RHEOLOGY MODIFICATION OF SETTLED SOLIDS IN MINERAL PROCESSING
(FR) MODIFICATION RHEOLOGIQUE DU DECANTAT DANS LE TRAITEMENT DES MINERAUX
Abstract
(EN)
The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a viscosity modifier to the settled mud and in front of the rake blade by pumping the viscosity modifier down the rake arm to the area in front of the rake blade. The method also includes an improved rake mechanism that includes a means for delivering viscosity modifier to the settled mud and in front of the rake blade. The present invention also includes a method of increasing the rate of consolidation of flocculated solids in a slurry.
(FR)
L'invention concerne un procédé permettant de réduire la viscosité du décantat ou de la sousverse d'un épaississeur à râteau, ce qui permet de réduire le couple nécessaire pour passer la lame du râteau sur le décantat. Ce procédé consiste à amener un modificateur de viscosité sur le décantat et devant la lame du râteau en faisant descendre ce modificateur de viscosité le long du bras du râteau jusqu'à une zone située devant la lame du râteau. Par ailleurs, ce procédé comprend un mécanisme de râteau amélioré pourvu d'un dispositif amenant le modificateur de viscosité jusqu'au décantat et devant la lame du râteau. L'invention concerne également un procédé permettant d'augmenter la vitesse de consolidation des floculats dans une suspension épaisse.
Also published as
ZA200105625
Latest bibliographic data on file with the International Bureau