TREATMENT OF COAL ASH

摘要

PURPOSE: To efficiently separate the unburnt carbon component in coal ash. CONSTITUTION: In this flotation treatment of coal ash provided with both a hydrophobicity providing stage for providing the unburnt carbon component in the coal ash with hydrophobicity by adding a coagulating agent to an aqueous slurry of the coal ash and a flotation stage for generating air bubbles in the aqueous slurry by adding a foaming agent to the slurry and floating the unburnt carbon component through sticking it to the air bubbles, coarse particles are removed beforehand from coal ash to be treated and then the resulting coal free of coarse particles is subjected to the treatment.