The invention discloses a
fly ash multi-stage recycling treatment device. The
fly ash multi-stage recycling treatment device comprises a first-section
rotary kiln, a second-section
rotary kiln, a
crystallization device, a first high-temperature dust remover and a
waste gas treatment device, wherein the
tail parts of the first-section
rotary kiln and the second-section rotary
kiln are provided withan exhaust port and a
discharge port correspondingly; the exhaust port of the first-section rotary
kiln communicates with an air inlet of the first high-temperature dust remover; the exhaust port ofthe first high-temperature dust remover communicates with the
waste gas treatment device; a dust
discharge port of the first high-temperature dust remover communicates with a collecting device; the
discharge port of the first-section rotary
kiln communicates with a feeding port of the second-section rotary kiln; and the exhaust port of the second-section rotary kiln communicates with the
crystallization device. The invention further provides a
fly ash multi-stage recycling treatment process. According to the fly ash multi-stage recycling treatment device and process,
chlorine salt and a smallamount of heavy
metal are separated from light fly ash through a two-stage
combustion process, the
chlorine salt and the small amount of heavy
metal can also be used as industrial salt after being treated by a subsequent process in the later period, the separated light fly ash is subjected to dust removal through the high-temperature dust remover, then dust is collected and used for producing light bricks, and secondary pollutants are basically not generated.