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Method for synergistically recycling non-ferrous metals from household garbage incineration fly ash and furnace slag
The invention discloses a method for synergistically recycling non-ferrous metals from household garbage incineration fly ash and furnace slag. The method comprises the steps that grading pretreatment is carried out on the fly ash through the difference of chlorine contents and forms in different particle components of the fly ash to obtain fine-particle fly ash and coarse-particle fly ash, and iron removal pretreatment is carried out on the furnace slag to obtain non-iron-containing slag; the coarse-particle fly ash is separately granulated, the non-iron-containing slag is uniformly mixed with the fine-particle fly ash and granulated; a mixture of the non-iron-containing slag and the fine-particle fly ash is heated and melted in different regions, flue gas particles in a low-temperature region and a medium-temperature region are respectively recycled, then the coarse-particle fly ash is added in a high-temperature region, and flue gas particles in the high-temperature region is recycled to obtain particles containing different metal chlorides. According to the method for synergistically recycling the non-ferrous metals from the household garbage incineration fly ash and the furnace slag, the non-ferrous metals in the fly ash and the furnace slag are recycled through high-temperature melting treatment of the fly ash and the furnace slag, and products such as zinc chloride, lead chloride and cadmium chloride are obtained and can be sold as primary metal raw materials, so that high-value utilization of the fly ash and the furnace slag is achieved.
本发明公开了一种生活垃圾焚烧飞灰与炉渣协同回收非铁金属的方法，其包括：利用飞灰不同颗粒组分中氯含量及形态的差异，将飞灰进行分级预处理获得细颗粒飞灰和粗颗粒飞灰，将炉渣进行除铁预处理获得非含铁炉渣；粗颗粒飞灰单独进行造粒，将非含铁炉渣与细颗粒飞灰混匀并造粒；非含铁炉渣与细颗粒飞灰的混合物进行分区加热熔融并分别回收低温区及中温区的烟气颗粒物，然后在高温区加入粗颗粒飞灰并回收高温区的烟气颗粒物，得到含有不同金属氯化物的颗粒物。本发明通过飞灰与炉渣的高温熔融处理回收飞灰和炉渣中的非铁金属，得到氯化锌、氯化铅和氯化镉等产品，可作为初级金属原料出售，实现飞灰和炉渣的高值化利用。
Method for synergistically recycling non-ferrous metals from household garbage incineration fly ash and furnace slag
The invention discloses a method for synergistically recycling non-ferrous metals from household garbage incineration fly ash and furnace slag. The method comprises the steps that grading pretreatment is carried out on the fly ash through the difference of chlorine contents and forms in different particle components of the fly ash to obtain fine-particle fly ash and coarse-particle fly ash, and iron removal pretreatment is carried out on the furnace slag to obtain non-iron-containing slag; the coarse-particle fly ash is separately granulated, the non-iron-containing slag is uniformly mixed with the fine-particle fly ash and granulated; a mixture of the non-iron-containing slag and the fine-particle fly ash is heated and melted in different regions, flue gas particles in a low-temperature region and a medium-temperature region are respectively recycled, then the coarse-particle fly ash is added in a high-temperature region, and flue gas particles in the high-temperature region is recycled to obtain particles containing different metal chlorides. According to the method for synergistically recycling the non-ferrous metals from the household garbage incineration fly ash and the furnace slag, the non-ferrous metals in the fly ash and the furnace slag are recycled through high-temperature melting treatment of the fly ash and the furnace slag, and products such as zinc chloride, lead chloride and cadmium chloride are obtained and can be sold as primary metal raw materials, so that high-value utilization of the fly ash and the furnace slag is achieved.
本发明公开了一种生活垃圾焚烧飞灰与炉渣协同回收非铁金属的方法，其包括：利用飞灰不同颗粒组分中氯含量及形态的差异，将飞灰进行分级预处理获得细颗粒飞灰和粗颗粒飞灰，将炉渣进行除铁预处理获得非含铁炉渣；粗颗粒飞灰单独进行造粒，将非含铁炉渣与细颗粒飞灰混匀并造粒；非含铁炉渣与细颗粒飞灰的混合物进行分区加热熔融并分别回收低温区及中温区的烟气颗粒物，然后在高温区加入粗颗粒飞灰并回收高温区的烟气颗粒物，得到含有不同金属氯化物的颗粒物。本发明通过飞灰与炉渣的高温熔融处理回收飞灰和炉渣中的非铁金属，得到氯化锌、氯化铅和氯化镉等产品，可作为初级金属原料出售，实现飞灰和炉渣的高值化利用。
Method for synergistically recycling non-ferrous metals from household garbage incineration fly ash and furnace slag
一种生活垃圾焚烧飞灰与炉渣协同回收非铁金属的方法
DU BING (author) / DONG JIAN (author) / ZHANG HENG (author) / DAI XIAODONG (author) / GE YAJUN (author) / HE JUN (author) / PENG SHUJING (author) / YANG JINBING (author) / ZHANG ZHENG (author) / WEI YIRAN (author)
2021-04-23
Patent
Electronic Resource
Chinese
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