METHOD FOR PARTICLE SIZE DISTRIBUTION CONTROL IN A BAYER CIRCUIT DECOMPOSITION CHAIN, COMPRISING AN AGGLOMERATION PHASE

摘要

the invention concerns a method forperforming - ecomposition in an americantype on the quality of the bayer circuitparticle size grading is monitored by measuringthe screen size of the flowing undersize at.hydrate, comprising: a) a preparation stepwhich consists in establishing a relationship rbetween the screen undersize at x1 m andthe screen undersize at x2 m, wherein x1 isstrictly less than 2, and deducing therefromtriggering levels on the screen undersize at x1m; (b) the performing right of the process.consists, besides the daily measurement of thescreen undersize at 2 mm, in the daily educationthe screen size of the flowing undersize at x1hydrate and triggering a corrective actionthe suspension and the head and decompositionthe value of the screen undersize measured atx1 m reaches one of the triggering.established during the preliminary step andregularly updated.the decomposition of a driving circuit in which bayer's american stylethe size of the hydrate is used asby measuring the hydrate from x2 or turnover, comprising: (a)a preparation stage, in order to establish a relationship.r between to x1 or x2 and to m, where x1 is strictlyless than x2 and triggers on the derivedturning to x1 m; (b) the conduct of the process itself, that is,in addition to the daily to x2 m, ain daily to hydrate, and especially in the capitalinitiation of remedial action on the head suspensionwhen the measured value of the decay data is from x1the triggers, which had been prepared in the course of phasepreliminary and has been regularly updated.