Method of adding stmp to a gypsum slurry

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 24/00 (2006.01) B28C 5/00 (2006.01) C01F 11/46 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2667438

The disclosure relates to a method for effectively and efficiently adding sodium trimetaphosphate to a gypsum slurry. In one exemplary embodiment, the sodium trimetaphosphate is added at the same time as foam is added to the gypsum slurry through the foam waterline. In another exemplary embodiment, the sodium trimetaphosphate is added at the same time as additional water is added to the gypsum slurry through the gauging waterline. The sodium trimetaphospahte can be added to either or both waterlines in its dry form or in a diluted solution.

La présente invention concerne un procédé d'addition efficace de trimétaphosphate de sodium dans une boue de gypse. Dans un mode de réalisation à titre d'exemple, le trimétaphosphate de sodium est ajouté pendant l'addition d'une mousse dans la boue de gypse à travers la conduite de la mousse. Dans un autre mode de réalisation à titre d'exemple, le trimétaphosphate de sodium est ajouté pendant l'addition d'eau additionnelle dans la boue de gypse à travers la conduite de mesure du débit. Le trimétaphosphate de sodium peut être ajouté à travers une conduite ou les deux sous sa forme sèche ou dans une solution diluée.

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