Manufacturing Method of Pelletizied Adsorbent for Waste Water Treatment Using Highly Unburned Carbon Fly Ash

摘要

PURPOSE: A method for manufacturing an adsorbent pellet for wastewater treatment by using highly unburned carbon fly ash is provided to recycle highly unburned carbon fly ash generated from thermoelectric power plants as byproduct. CONSTITUTION: The method for manufacturing an adsorbent pellet comprises the steps of blending 60-70 wt.% of raw material, 15-20 wt.% of coal tar pitch with a softening point of higher than 85C, 2-3 wt.% of pitch solvent material, 2-3 wt.% of binder, 4-6 wt.% of catalyst and 8-12 wt.% of water; mixing above mixture for 30-60 minutes at 50-60C; pelletization of above mixture; carbonization of prepared pellet in the temperature range of 550 to 650C for 30-90 minutes as supplying nitrogen in an amount of 10 to 30 mL/min in rotary kiln; supplying hot steam that is preheated to the temperature range of 150 to 220C in an amount of 1g-hot steam/hrg-coal; and slowly cooling the pellet as supplying nitrogen gas in an amount of 10 to 30 mL/min.