FACTORS AFFECTING SILICA CONTENT OF ALUMINIUM HYDROXIDE PRODUCT IN CARBONIZATION PROCESS

摘要

The regularity of the carbonization process in alumina production has been summarized by thepattern recognition and regression.A mathematical model has been proposed to describe thefactors affecting the silica content of aluminium hydroxide product.The high concentration ofaluminate ions in solution will produce aluminium hydroxide with low content of SiO₂ underthe condition of Al₂O₃/SiO₂ ratio kept unchanged.This was confirmed by certain scaleexperiments.