Process for the treatment of fly ashes in order to remove the calcium sulphite therefrom

摘要

According to this process, the fly ashes are oxidised. This oxidation can be carried out using hydrogen peroxide having a concentration of 10 to 298 volumes, preferably in a hydrogen peroxide/ash ratio by mass in the region of the stoichiometric ratio, or by sparging oxygen into an aqueous ash suspension. <IMAGE>