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Melting separation treatment method for heavy metal in waste incineration fly ash
The invention relates to a melting separation treatment method for heavy metal in waste incineration fly ash, and belongs to the technical field of hazardous waste treatment and resource recycling. The waste incineration fly ash is subjected to water washing and acid pickling dechlorination, and a magnetic adsorbent prepared from iron-rich copper slag is used for adsorbing heavy metal ions in fly ash water washing liquid and acid washing liquid; and then the magnetic adsorbent adsorbed with the heavy metal ions obtained through recovery is mixed with the solid slag to be subjected to high-temperature melting treatment, and iron alloy and molten slag are obtained. According to the technical scheme, magnetite and fayalite contained in the iron-rich copper slag are used for preparing the magnetic adsorbent, the magnetic adsorbent capable of recycling and adsorbing heavy metal ions can be directly mixed with the solid slag for melting through an external magnetic field, and the adsorbed heavy metal ions and heavy metal contained in the magnetic adsorbent are effectively recycled. The treatment method is simple to operate, wastes are treated by wastes, the cost is relatively low, and the heavy metals in the iron-rich copper slag and the fly ash are effectively recovered.
本发明涉及一种垃圾焚烧飞灰重金属的熔融分离处理方法，属于危险废物处理处置与资源化回收技术领域，将垃圾焚烧飞灰先进行水洗和酸洗脱氯，利用富铁铜渣制成的磁性吸附剂吸附飞灰水洗液和酸洗液中的重金属离子，再通过外加磁场回收，然后将回收得到的吸附有重金属离子的磁性吸附剂与固渣混合进行高温熔融处理，得到铁合金和熔渣。本发明技术方案中，利用富铁铜渣中含有磁铁矿和铁橄榄石制成磁性吸附剂，通过外加磁场即可回收，吸附重金属离子的磁性吸附剂直接与固渣混合进行熔融，使得吸附的重金属离子以及磁性吸附剂本身含有的重金属均得到有效回收。这种处理方法操作简单，以废治废，不仅成本较低，富铁铜渣和飞灰中的重金属均得到有效回收。
Melting separation treatment method for heavy metal in waste incineration fly ash
The invention relates to a melting separation treatment method for heavy metal in waste incineration fly ash, and belongs to the technical field of hazardous waste treatment and resource recycling. The waste incineration fly ash is subjected to water washing and acid pickling dechlorination, and a magnetic adsorbent prepared from iron-rich copper slag is used for adsorbing heavy metal ions in fly ash water washing liquid and acid washing liquid; and then the magnetic adsorbent adsorbed with the heavy metal ions obtained through recovery is mixed with the solid slag to be subjected to high-temperature melting treatment, and iron alloy and molten slag are obtained. According to the technical scheme, magnetite and fayalite contained in the iron-rich copper slag are used for preparing the magnetic adsorbent, the magnetic adsorbent capable of recycling and adsorbing heavy metal ions can be directly mixed with the solid slag for melting through an external magnetic field, and the adsorbed heavy metal ions and heavy metal contained in the magnetic adsorbent are effectively recycled. The treatment method is simple to operate, wastes are treated by wastes, the cost is relatively low, and the heavy metals in the iron-rich copper slag and the fly ash are effectively recovered.
本发明涉及一种垃圾焚烧飞灰重金属的熔融分离处理方法，属于危险废物处理处置与资源化回收技术领域，将垃圾焚烧飞灰先进行水洗和酸洗脱氯，利用富铁铜渣制成的磁性吸附剂吸附飞灰水洗液和酸洗液中的重金属离子，再通过外加磁场回收，然后将回收得到的吸附有重金属离子的磁性吸附剂与固渣混合进行高温熔融处理，得到铁合金和熔渣。本发明技术方案中，利用富铁铜渣中含有磁铁矿和铁橄榄石制成磁性吸附剂，通过外加磁场即可回收，吸附重金属离子的磁性吸附剂直接与固渣混合进行熔融，使得吸附的重金属离子以及磁性吸附剂本身含有的重金属均得到有效回收。这种处理方法操作简单，以废治废，不仅成本较低，富铁铜渣和飞灰中的重金属均得到有效回收。
Melting separation treatment method for heavy metal in waste incineration fly ash
一种垃圾焚烧飞灰重金属的熔融分离处理方法
ZHANG YU (author) / CHEN LIDONG (author) / ZHANG JINBIN (author)
2024-05-31
Patent
Electronic Resource
Chinese
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