Beryllium flotation process

Details Beryllium flotation process Beryllium flotation process

B - Operations, Transporting

03

D

361/20

B03D 1/02 (2006.01) B03D 1/002 (2006.01) B03D 1/004 (2006.01) B03D 1/008 (2006.01)

Patent

CA 1287415

TITLE: A BERYLLIUM FLOTATION PROCESS ABSTRACT A process and reagents are described for separating beryllium silicate concentrates by flotation from oxidic minerals. The process is especially suitable for the separation of phenacite and bertrandite present in ores with complex gangue compositions. The ore is ground and subjected to acid pretreatment, then conditioned by the addition of pH modifier, alkali fluoride activator and a depressant containing sodium hexametaphosphate and carboxymethyl cellulose, or hexametaphosphate and quebracho. The conditioned ore is thereafter treated with a tall oil fatty acid-based collector mixture, of general formula C17H31-35COOH; which also contains cresylic acid, kerosene and a branched short-chained aliphatic alcohol, such as methyl-iso-butyl carbinol. Mercapto acetic acid and alkali metal hydrogen sulphide may also be added in the second and third stages of conditioning, respectively, for increasing selectivity. The mineral concentration process includes conventional rougher and cleaner flotation steps. Yttrium and rare earth oxides, if present will be retained in the tailings.

517640

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