DRY PREPARATION METHOD OF A-TYPE ZEOLITE FOR WASTEWATER TREATMENT USING FLY ASH CONTAINING HIGHLY UNBURNED CARBON

摘要

PURPOSE: A dry preparation method of A-type zeolite for wastewater adsorbent using fly ash containing highly unburned carbon is provided. CONSTITUTION: The preparation method comprises: mixing 100 wt.% of fly ash or furnace slag with 10-50 wt.% of CaO and Na2CO3 in their mole ratio of 0.3-4 and carrying out hydrothermal reaction by heating at 20-200°C for 1-8 hours; and putting into molds, drying for 7 hours at room temperature or drying and reacting at 50-200°C for more than 24 hours in order to prepare molded A-type zeolite for treatment of polluted and wastewater.