一种磷石膏渗滤液除氟剂的制备方法及应用
By preparing a defluorinating agent with a porous calcium oxide structure and combining it with the adsorption properties of cerium oxide, the problem of fluorosilicate scaling in phosphogypsum leachate was solved, achieving efficient defluorination and phosphorus resource recovery, reducing the fluoride content in phosphogypsum leachate, and mitigating scaling in the membrane system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YIDU XINGFA CHEMICAL CO LTD
- Filing Date
- 2024-06-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for treating phosphogypsum leachate suffer from fluorosilicate scaling problems. Furthermore, traditional methods have low defluorination efficiency under acidic conditions, resulting in difficult sludge production and significant waste of phosphorus resources. Therefore, it is necessary to develop a method that can efficiently remove fluoride under acidic conditions while reducing the leaching of harmful elements and alleviating scaling in the membrane system.
Using raw materials such as phosphogypsum, phosphate tailings, ammonium carbonate, and cerium sulfate, a defluorinating agent is prepared through wet grinding and calcination. An activator and potassium 3-sulfonopropyl methacrylate are added to form a porous calcium oxide structure. Combined with the adsorption properties of cerium oxide, efficient defluorination and phosphorus recovery are achieved.
It achieves efficient fluoride removal under acidic conditions, reduces phosphorus loss, decreases sludge production, extends the cleaning frequency of the membrane system, improves the recovery rate of phosphorus resources, and reduces fluorosilicate scaling.