Method for naturally drying mineral pulps

Details Method for naturally drying mineral pulps Method for naturally drying mineral pulps

C - Chemistry, Metallurgy

02

F

362/46

C02F 11/14 (2006.01) B01D 24/20 (2006.01) B01D 37/03 (2006.01)

Patent

CA 1188435

ABSTRACT OF THE DISCLOSURE A method of spreading a pulp for the purpose of drying it naturally, the pulp having a solid fraction which has a d80 of less than 100 microns. This method comprises the following steps: a) adjusting the level of solids of the pulp to between 2 and 25%; b) adding a flocculating agent to the pulp and mixing it with same, the amount of said flocculating agent being between two thirds and 98% of the optimum required for the flocculation of said pulp; and c) spreading the mixture of pulp and flocculating agent, in the open air, in a bed the sides of which are permeable, and the bottom of which has a slope of less than 5 meters per 1000 meters, said spreading taking place 1 to 20 minutes after the adding and mixing of the flocculating agent.

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