| 摘要 |
An apparatus and process for removing unburned carbon in fly ash. The apparatus includes a stainless steel heating chamber (18) in a range from 800 to 1200 degrees F. The fly ash is introduced at one end (20) of the heating chamber (18) and moved slowly to an opposite end by a screw auger (52). The auger (52) mixes the fly ash with oxygen. The oxygen is introduced at spaced apart heating areas (62, 68, 74, 80) along the length of the heating chamber (18). The oxygen accelerates the heating and burning of the unwanted carbon in the fly ash. The amount of oxygen introduced into the heating chamber (18) is under computer control (32) to regulate the temperature in the heating chamber (18) and the heating of the fly ash. The heating chamber is also used to preheat untreated fly ash received through a preheating chamber (16) before it is introduced into the heating chamber (18).
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