A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of cemented filling body based on phosphogypsum pretreatment
The invention discloses a cemented filling body preparation method based on phosphogypsum pretreatment, and particularly relates to the technical field of phosphogypsum application. The method comprises the following steps: selecting phosphogypsum subjected to sufficient filter pressing in a phosphoric acid production process; taking NaOH, adding a small amount of deionized water to dissolve, cooling to room temperature, and adding deionized water to dilute the NaOH solution; adding an APAM flocculating agent into deionized water to prepare an APAM solution; mixing ardealite with the diluted NaOH solution, and adding an APAM solution to realize separation of supernate and high-concentration ardealite slurry; after standing is finished, calcium hydroxide is added to adjust the pH of supernate to be alkalescent, and then the supernate is subjected to filtering, drying and flotation processes; and adding a certain amount of deionized water and ordinary Portland cement, and uniformly stirring to obtain the required homogeneous cemented filling slurry. By adopting the technical scheme of the invention, the problem that the phosphogypsum in the existing cemented filling body pollutes underground water is solved, and the application prospect of the phosphogypsum in the filling field is further widened.
本发明专利公开了一种基于磷石膏预处理的胶结充填体制备方法，具体涉及磷石膏应用技术领域。如下步骤：选取磷酸生产过程中经充分压滤后的磷石膏；取NaOH加少量去离子水溶解，冷却至室温后加去离子水将NaOH溶液稀释；取APAM絮凝剂加入去离子水制备成APAM溶液；将磷石膏与稀释后的NaOH溶液进行混合，加入APAM溶液实现上清液与高浓度磷石膏浆体分离；静置结束后，加入氢氧化钙调解上清液pH至弱碱性后，对上清液进行过滤、烘干、浮选工艺；加入一定量去离子水、普通硅酸盐水泥，搅拌均匀后即为所需均质胶结充填料浆。采用本发明技术方案解决了现有的胶结充填体中磷石膏存在污染地下水的问题，进一步拓宽了磷石膏在充填领域的应用前景。
Preparation method of cemented filling body based on phosphogypsum pretreatment
The invention discloses a cemented filling body preparation method based on phosphogypsum pretreatment, and particularly relates to the technical field of phosphogypsum application. The method comprises the following steps: selecting phosphogypsum subjected to sufficient filter pressing in a phosphoric acid production process; taking NaOH, adding a small amount of deionized water to dissolve, cooling to room temperature, and adding deionized water to dilute the NaOH solution; adding an APAM flocculating agent into deionized water to prepare an APAM solution; mixing ardealite with the diluted NaOH solution, and adding an APAM solution to realize separation of supernate and high-concentration ardealite slurry; after standing is finished, calcium hydroxide is added to adjust the pH of supernate to be alkalescent, and then the supernate is subjected to filtering, drying and flotation processes; and adding a certain amount of deionized water and ordinary Portland cement, and uniformly stirring to obtain the required homogeneous cemented filling slurry. By adopting the technical scheme of the invention, the problem that the phosphogypsum in the existing cemented filling body pollutes underground water is solved, and the application prospect of the phosphogypsum in the filling field is further widened.
本发明专利公开了一种基于磷石膏预处理的胶结充填体制备方法，具体涉及磷石膏应用技术领域。如下步骤：选取磷酸生产过程中经充分压滤后的磷石膏；取NaOH加少量去离子水溶解，冷却至室温后加去离子水将NaOH溶液稀释；取APAM絮凝剂加入去离子水制备成APAM溶液；将磷石膏与稀释后的NaOH溶液进行混合，加入APAM溶液实现上清液与高浓度磷石膏浆体分离；静置结束后，加入氢氧化钙调解上清液pH至弱碱性后，对上清液进行过滤、烘干、浮选工艺；加入一定量去离子水、普通硅酸盐水泥，搅拌均匀后即为所需均质胶结充填料浆。采用本发明技术方案解决了现有的胶结充填体中磷石膏存在污染地下水的问题，进一步拓宽了磷石膏在充填领域的应用前景。
Preparation method of cemented filling body based on phosphogypsum pretreatment
一种基于磷石膏预处理的胶结充填体制备方法
CHEN QIUSONG (author) / WU AIXIANG (author) / RUAN ZHU'EN (author) / WANG DAOLIN (author)
2024-12-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Anhydrous gypsum novel mortar phosphogypsum cemented filling body and preparation method thereof
| European Patent Office | 2024
| European Patent Office | 2020
| European Patent Office | 2022
Preparation method of coal-based solid waste cemented filling body
| European Patent Office | 2024