Wet grinding method for crude phosphate rock

Details Wet grinding method for crude phosphate rock Wet grinding method for crude phosphate rock

1977-09-19

1978-09-12

Custer, Jr., Granville Y.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 21, 423167, B02C 2318

Patent

active

041131843

ABSTRACT:
This application discloses a method of wet grinding crude phosphate rock containing clay minerals and the like impurities. The procedures of the invention produce a rock slurry of enhanced fluidity and a desired degree of economy; and the principles of the invention may be applied to rock slurries after size-reduction. The method of the invention contemplates introducing coarsely sized, crude phosphate rock with component clay minerals or the like into a grinding mill together with a suitable quantity of water and with an amount of a calcium-free alkaline amendment or additive material which is adequate to establish and maintain a pH of at least about 8.5 in the mixture.

REFERENCES:
patent: 2571866 (1951-10-01), Greene
patent: 2843456 (1958-07-01), Porter
patent: 3113838 (1963-12-01), Perri et al.
patent: 3204877 (1965-09-01), Barr et al.
patent: 4042666 (1977-08-01), Rice et al.
patent: 4044107 (1977-08-01), Houghtaling

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