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Utilization method of waste incineration fly ash and iron tailings
The invention belongs to the field of solid waste recycling, and particularly relates to a utilization method of waste incineration fly ash and iron tailings. The invention relates to a utilization method of waste incineration fly ash and iron tailings. The utilization method comprises the following steps: mixing the waste incineration fly ash and the finely ground iron tailings, and then carrying out smelting reduction reaction to respectively prepare an iron alloy, a geopolymer material block and secondary fly ash. According to the method, the waste incineration fly ash and the iron tailings are subjected to high-temperature synergistic treatment, heavy metal oxides in the fly ash and iron oxides in the iron tailings are reduced into metal iron and heavy metal respectively, the ferro-philic heavy metal and the metal iron form an alloy, the iron grade in the iron alloy can reach 95% or above, and the recovery rate reaches 90% or above; volatile heavy metals are subjected to a chlorination reaction and enter secondary fly ash; meanwhile, an amorphous geopolymer material mainly comprising a silica tetrahedron and an alumina tetrahedron is also obtained. The method not only realizes detoxification of the waste incineration fly ash, but also realizes high-value resource utilization of the waste incineration fly ash and the iron tailings.
本发明属于固体废物资源化领域，尤其涉及一种垃圾焚烧飞灰和铁尾矿的利用方法。一种垃圾焚烧飞灰和铁尾矿的利用方法，包括以下步骤：将垃圾焚烧飞灰与细磨后的铁尾矿混合后进行熔融还原反应分别制得铁合金、地聚物材料块体和二次飞灰。本发明将垃圾焚烧飞灰和铁尾矿高温协同处理，飞灰中的重金属氧化物、铁尾矿中的铁氧化物分别被还原为金属铁及重金属，亲铁性重金属与金属铁形成合金，铁合金中铁品位可达95%以上，回收率达到90%以上；挥发性重金属发生氯化反应，进入二次飞灰；同时，还得到了以硅氧四面体和铝氧四面体为主的非晶态地聚物材料。本发明不仅实现了垃圾焚烧飞灰的解毒，同时实现了垃圾焚烧飞灰和铁尾矿的高值资源化利用。
Utilization method of waste incineration fly ash and iron tailings
The invention belongs to the field of solid waste recycling, and particularly relates to a utilization method of waste incineration fly ash and iron tailings. The invention relates to a utilization method of waste incineration fly ash and iron tailings. The utilization method comprises the following steps: mixing the waste incineration fly ash and the finely ground iron tailings, and then carrying out smelting reduction reaction to respectively prepare an iron alloy, a geopolymer material block and secondary fly ash. According to the method, the waste incineration fly ash and the iron tailings are subjected to high-temperature synergistic treatment, heavy metal oxides in the fly ash and iron oxides in the iron tailings are reduced into metal iron and heavy metal respectively, the ferro-philic heavy metal and the metal iron form an alloy, the iron grade in the iron alloy can reach 95% or above, and the recovery rate reaches 90% or above; volatile heavy metals are subjected to a chlorination reaction and enter secondary fly ash; meanwhile, an amorphous geopolymer material mainly comprising a silica tetrahedron and an alumina tetrahedron is also obtained. The method not only realizes detoxification of the waste incineration fly ash, but also realizes high-value resource utilization of the waste incineration fly ash and the iron tailings.
本发明属于固体废物资源化领域，尤其涉及一种垃圾焚烧飞灰和铁尾矿的利用方法。一种垃圾焚烧飞灰和铁尾矿的利用方法，包括以下步骤：将垃圾焚烧飞灰与细磨后的铁尾矿混合后进行熔融还原反应分别制得铁合金、地聚物材料块体和二次飞灰。本发明将垃圾焚烧飞灰和铁尾矿高温协同处理，飞灰中的重金属氧化物、铁尾矿中的铁氧化物分别被还原为金属铁及重金属，亲铁性重金属与金属铁形成合金，铁合金中铁品位可达95%以上，回收率达到90%以上；挥发性重金属发生氯化反应，进入二次飞灰；同时，还得到了以硅氧四面体和铝氧四面体为主的非晶态地聚物材料。本发明不仅实现了垃圾焚烧飞灰的解毒，同时实现了垃圾焚烧飞灰和铁尾矿的高值资源化利用。
Utilization method of waste incineration fly ash and iron tailings
一种垃圾焚烧飞灰和铁尾矿的利用方法
LI QUANMING (author) / GENG CHAO (author) / CHEN CHENG (author) / ZHANG HONG (author) / DUAN ZHIJIE (author) / WANG YUKAI (author)
2024-08-16
Patent
Electronic Resource
Chinese
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