一种从磷石膏洗涤水中分步回收磷酸根、氟离子和硫酸根的方法
The process of 'phosphate preferential precipitation-fluoride ion induced crystallization-sulfate directional precipitation' has solved the problem of multi-component ions in phosphogypsum washing water, achieving efficient recovery and resource utilization, and achieving the goal of high purity and low energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot efficiently recover phosphate, fluoride, and sulfate ions from phosphogypsum washing water, leading to resource waste and environmental pollution. Furthermore, existing separation technologies suffer from ion interference and high energy consumption.
A three-step process of 'phosphate preferential precipitation-fluoride ion induced crystallization-sulfate directional precipitation' is adopted, combined with pH gradient control and seed crystal enhancement. By precisely controlling the reaction conditions and reagent dosage, the efficient separation and resource utilization of multiple components are achieved.
The recovery rates of phosphate, fluoride and sulfate ions reached 98.2%, 95.7% and 96.8% respectively, and the product purity reached 97%, 96% and 98%, respectively. This reduced energy consumption and reagent consumption, and achieved the effect of deep purification and resource utilization of wastewater.
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Figure CN120553897B_ABST