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A platform for research: civil engineering, architecture and urbanism
Phosphogypsum immersion cleaning agent and phosphogypsum harmless treatment method
The invention discloses an immersion cleaning agent for ardealite and a harmless treatment method for ardealite. The immersion cleaning agent is prepared from inorganic acid, organic acid and butyl acetate according to a certain proportion. The harmless treatment method of the phosphogypsum comprises the following steps: S1, uniformly mixing fresh dry-discharged phosphogypsum with water to prepare phosphogypsum slurry; s2, carrying out immersion cleaning treatment on the ardealite slurry by using an immersion cleaning agent, and after immersion cleaning is completed, concentrating and dehydrating to obtain immersion-cleaned ardealite; s3, carrying out screening and friction water washing on the immersion-washed ardealite; s4, carrying out dehydration treatment on the phosphogypsum concentrated slurry subjected to friction and water washing, so as to obtain water-washed phosphogypsum; s5, carrying out oxidation treatment on the washed ardealite by using an oxidizing agent to obtain whitened ardealite; and S6, carrying out acid-base neutralization treatment on the whitened ardealite by using quick lime to obtain harmless high-purity high-whiteness regenerated gypsum. According to the method, only soluble fluorine, phosphorus, organic matters and other impurities in the phosphogypsum are effectively removed, eutectic phosphorus in the phosphogypsum can be deeply removed, and meanwhile, the whiteness of the regenerated gypsum is increased.
本发明公开了一种磷石膏的浸洗剂和一种磷石膏的无害化处理方法，所述的浸洗剂由无机酸、有机酸和乙酸丁酯按照一定配比组成。所述的磷石膏的无害化处理方法为：S1、取新鲜干排磷石膏与水混合均匀，调制成磷石膏浆；S2、将磷石膏浆用浸洗剂进行浸洗处理，浸洗完成后浓缩脱水，得到浸洗磷石膏；S3、将浸洗磷石膏进行筛分和摩擦水洗；S4、将摩擦水洗后的磷石膏浓缩浆进行脱水处理，得到水洗磷石膏；S5、将水洗磷石膏中用氧化剂进行氧化处理，得到增白磷石膏；S6、将增白磷石膏用生石灰进行酸碱中和处理，得到无害化高纯度高白度的再生石膏。该方法仅有效去除磷石膏中的可溶性氟、磷和有机物等杂质，还可深度去除其中的共晶磷，同时增加再生石膏白度。
Phosphogypsum immersion cleaning agent and phosphogypsum harmless treatment method
The invention discloses an immersion cleaning agent for ardealite and a harmless treatment method for ardealite. The immersion cleaning agent is prepared from inorganic acid, organic acid and butyl acetate according to a certain proportion. The harmless treatment method of the phosphogypsum comprises the following steps: S1, uniformly mixing fresh dry-discharged phosphogypsum with water to prepare phosphogypsum slurry; s2, carrying out immersion cleaning treatment on the ardealite slurry by using an immersion cleaning agent, and after immersion cleaning is completed, concentrating and dehydrating to obtain immersion-cleaned ardealite; s3, carrying out screening and friction water washing on the immersion-washed ardealite; s4, carrying out dehydration treatment on the phosphogypsum concentrated slurry subjected to friction and water washing, so as to obtain water-washed phosphogypsum; s5, carrying out oxidation treatment on the washed ardealite by using an oxidizing agent to obtain whitened ardealite; and S6, carrying out acid-base neutralization treatment on the whitened ardealite by using quick lime to obtain harmless high-purity high-whiteness regenerated gypsum. According to the method, only soluble fluorine, phosphorus, organic matters and other impurities in the phosphogypsum are effectively removed, eutectic phosphorus in the phosphogypsum can be deeply removed, and meanwhile, the whiteness of the regenerated gypsum is increased.
本发明公开了一种磷石膏的浸洗剂和一种磷石膏的无害化处理方法，所述的浸洗剂由无机酸、有机酸和乙酸丁酯按照一定配比组成。所述的磷石膏的无害化处理方法为：S1、取新鲜干排磷石膏与水混合均匀，调制成磷石膏浆；S2、将磷石膏浆用浸洗剂进行浸洗处理，浸洗完成后浓缩脱水，得到浸洗磷石膏；S3、将浸洗磷石膏进行筛分和摩擦水洗；S4、将摩擦水洗后的磷石膏浓缩浆进行脱水处理，得到水洗磷石膏；S5、将水洗磷石膏中用氧化剂进行氧化处理，得到增白磷石膏；S6、将增白磷石膏用生石灰进行酸碱中和处理，得到无害化高纯度高白度的再生石膏。该方法仅有效去除磷石膏中的可溶性氟、磷和有机物等杂质，还可深度去除其中的共晶磷，同时增加再生石膏白度。
Phosphogypsum immersion cleaning agent and phosphogypsum harmless treatment method
一种磷石膏的浸洗剂和一种磷石膏的无害化处理方法
ZHANG JUNQING (author) / TAN HAO (author) / JIANG GONGXIN (author) / ZHANG CHANGWEN (author) / WANG KAI (author) / WANG CHEN (author)
2023-04-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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