Comminution of materials

Details Comminution of materials Comminution of materials

1979-07-24

1981-07-14

Goldberg, Howard N.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 24, B02C 2318

Patent

active

042782082

ABSTRACT:
A method of comminuting a solid material comprising calcium carbonate to obtain a product containing at least 60% by weight of particles smaller than 2 microns equivalent spherical diameter is disclosed. The method comprises forming an aqueous suspension of the solid material which has a solids content of up to 50% by weight and contains a dispersing agent, comminuting the solid material in the suspension by agitating the suspension in admixture with a particulate grinding medium, separating from the suspension thereby obtained an aqueous suspension containing comminuted solid material, classifying the latter suspension to obtain an aqueous suspension of a fine product which contains at least 60% by weight of particles smaller than 2 microns equivalent spherical diameter, flocculating the fine product by means of an electrolyte having a multivalent cation, and dewatering the aqueous suspension containing the comminuted and flocculated fine product.

REFERENCES:
patent: 3097801 (1963-07-01), Duke
patent: 3253791 (1966-05-01), Cohn et al.
patent: 3604634 (1971-09-01), Windle
patent: 3754712 (1973-08-01), Cecil
patent: 3934825 (1976-01-01), Delfosse et al.
patent: 3989195 (1976-11-01), Falcon-Steward

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