Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Phosphogypsum treatment method
The invention belongs to a phosphogypsum treatment method. The phosphogypsum treatment method comprises the following steps: (1) pre-treating: ageing phosphogypsum until the content of attached water is 8-10%; (2) combination reaction: adding a modifying agent into the aged phosphogypsum, stirring until the reaction is complete, wherein the weight ratio of the modifying agent to the phosphogypsum is (1-8): 100, the modifying agent is a mixture of lime and a cinerite mixed material, and the weight ratio of the lime to the cinerite mixed material is 1: (1.5-4); (3) drying: drying the phosphogypsum at 360-450 DEG C after the combination reaction until the content of attached water of the phosphogypsum is lower than 2%; and (4) calcining: calcining the dried phosphogypsum at 200-240 DEG C for 6-12 minutes. Granules of the phosphogypsum are more uniform by ageing, and due to the modification of the modifying agent, the acidity of the phosphogypsum is reduced, and the contents of water-soluble fluorine and water-soluble phosphorus are decreased; and then, the phosphogypsum is changed into building phosphogypsum with good performance by drying and calcining.
Phosphogypsum treatment method
The invention belongs to a phosphogypsum treatment method. The phosphogypsum treatment method comprises the following steps: (1) pre-treating: ageing phosphogypsum until the content of attached water is 8-10%; (2) combination reaction: adding a modifying agent into the aged phosphogypsum, stirring until the reaction is complete, wherein the weight ratio of the modifying agent to the phosphogypsum is (1-8): 100, the modifying agent is a mixture of lime and a cinerite mixed material, and the weight ratio of the lime to the cinerite mixed material is 1: (1.5-4); (3) drying: drying the phosphogypsum at 360-450 DEG C after the combination reaction until the content of attached water of the phosphogypsum is lower than 2%; and (4) calcining: calcining the dried phosphogypsum at 200-240 DEG C for 6-12 minutes. Granules of the phosphogypsum are more uniform by ageing, and due to the modification of the modifying agent, the acidity of the phosphogypsum is reduced, and the contents of water-soluble fluorine and water-soluble phosphorus are decreased; and then, the phosphogypsum is changed into building phosphogypsum with good performance by drying and calcining.
Phosphogypsum treatment method
XIE GUOGANG (Autor:in) / LIU YONGXU (Autor:in) / LIU YONGJIE (Autor:in) / LIU XIANGYONG (Autor:in) / ZHAO JIANXIN (Autor:in) / GU XIAOFENG (Autor:in) / ZHAO YUN (Autor:in) / WANG XIAOMING (Autor:in)
20.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
Phosphogypsum immersion cleaning agent and phosphogypsum harmless treatment method
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2020