METHOD TO SPREAD A PULP FOR ITS NATURAL DRYING

摘要

Method to spread a pulp of which the solid fraction has a d80 lower than 100 micrometers, for its natural drying. The method is characterized in that it comprises the following consecutive steps: a) adjustment of the proportion of solid material of the pulp to a value comprised between 2 and 25 %; b) addition and mixture of a flocculant to the pulp, the dose of flocculant being comprised between 2 thirds and 98 % of the optimum dose required to flocculate such a pulp; c) spreading at the open air in a basin of which the edges are permeable and of which the bottom has a gradient lower than 5 per thousand, said spreading being carried out within a time delay from 1 to 20 minutes after the addition and mixing of said flocculant.