Dewatering of aqueous suspensions

Details Dewatering of aqueous suspensions Dewatering of aqueous suspensions

B - Operations, Transporting

01

D

B01D 21/01 (2006.01) C02F 1/56 (2006.01) C02F 11/14 (2006.01) C08L 101/02 (2006.01)

Patent

CA 2223855

Belt pressing or other pressure dewatering of a high solids mineral suspension is facilitated by flocculating the suspension by mixing into the suspension anionic flocculant having IV at least 5 dl/g and a minor amount of a cationic flocculant which generally has IV at least 4 dl/g. The flocculants are normally such that counterionic precipitation occurs.

On facilite la pression à la bande, ou autre procédé de déshydratation par pression, d'une suspension minérale à teneur élevée en solides en déclenchant la floculation de la suspension au moyen de l'introduction dans la suspension, afin d'obtenir un mélange, d'un floculant anionique, dont la viscosité intrinsèque IV est d'au moins 5dl/g, et d'une quantité mineure d'un floculant cationique, dont la viscosité intrinsèque IV est généralement d'au moins 4dl/g. Ces floculants sont de nature à provoquer une précipitation de contre-ions.

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