Industrial separation method for removing fluoride hazardous waste in secondary aluminum ash through volatilization and condensation

The invention discloses an industrial separation method for removing fluoride in secondary aluminum ash through volatilization and condensation, which comprises the following steps of: quickly heating by virtue of secondary aluminum ash suspension gas-solid two-phase heat exchange, enriching volatil...

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Hauptverfasser: SUN WENBO, BIAN JINHUI, SHI DONGMEI, CHEN JIANJUN, QIAN YUEJIN, XIONG FEI, LI XIANHUI, YANG JUNRUI, WANG QINGFENG, CHANG JIJIN
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses an industrial separation method for removing fluoride in secondary aluminum ash through volatilization and condensation, which comprises the following steps of: quickly heating by virtue of secondary aluminum ash suspension gas-solid two-phase heat exchange, enriching volatile salts and fluoride in the secondary aluminum ash, classifying and collecting the volatile salts and fluoride in the secondary aluminum ash, calcining at high temperature and the like. Volatile salts and fluoride dangerous wastes in the secondary aluminum ash are enriched by adopting a suspension state gas-solid two-phase heat exchange rapid heating and volatilization-condensation method, non-dangerous volatile salts and dangerous salts are collected and treated in a classified manner through bypass ventilation, and the fluoride in the non-dangerous volatile salts and dangerous salts is completely volatilized through high-temperature calcination; the method has the characteristics of low production cost, less envi