Wet-grinding gypsum with polycarboxylates

Details Wet-grinding gypsum with polycarboxylates Wet-grinding gypsum with polycarboxylates

2011-01-04

2011-01-04

Francis, Faye (Department: 3725)

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

C241S021000

Reexamination Certificate

active

07861955

ABSTRACT:
The process of the present invention includes obtaining a feed material having an initial median particle size. A solution of a polycarboxylate dispersant in water is formed, then the feed material is added to the solution to form a slurry. The slurry is wet-ground to reduce the median particle size of the feed material. Optionally, the total amount of polycarboxylate dispersant is divided into a plurality of doses that are added periodically over the total grinding time.

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