C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
C01D 3/14 (2006.01) C01D 3/08 (2006.01)
Patent
CA 2285680
The invention concerns a method for enriching raw salt, whereby the salt is ground (2), then cooled (7-18) in an aqueous solution saturated with sodium chloride to a temperature lower than the transition temperature of anhydrous sodium chloride and dehydrate sodium chloride; then collecting a powder gruel (9) containing sodium chloride crystals and subjecting the powder to size grading fractionating (10) from which a fine grading fraction (12) and a coarse grading fraction (11) comprising enriched salt are collected.
Procédé d'enrichissement de sel brut, selon lequel on soumet le sel brut à un broyage (2), puis à un refroidissement (7-18) dans une solution aqueuse saturée de chlorure de sodium à une température inférieure à la température de transition du chlorure de sodium anhydre et du chlorure de sodium dihydraté, on recueille, à l'issue du refroidissement, un brouet d'une poudre (9) comprenant des cristaux de chlorure de sodium et on soumet la poudre à un fractionnement granulométrique (10) duquel on recueille une fraction granulométrique fine (12) et une fraction granulométrique grossière (11) comprenant le sel enrichi.
Robic
Solvay (societe Anonyme)
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