一种废旧石英坩埚的高效回收方法
By separating and purifying waste quartz crucibles using laser irradiation and wet acid leaching technology, the problem of recycling waste quartz crucibles has been solved, enabling the production of high-efficiency, high-purity recycled quartz powder, which is suitable for the comprehensive recycling and utilization of photovoltaic solid waste resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KUNMING UNIV OF SCI & TECH
- Filing Date
- 2024-01-10
- Publication Date
- 2026-07-17
AI Technical Summary
Waste quartz crucibles are difficult to recycle efficiently, mainly because the inner and outer walls contain quartz layers and the middle layer of quartz glass, which are difficult to separate. In addition, the crucibles are heavily contaminated with impurities, resulting in low recycling efficiency and low product purity, making them unsuitable for use as high-value products.
Laser irradiation is used to separate the cristobalite layer on the surface of waste quartz crucibles. Combined with wet acid leaching technology, the impurities are diffused to the surface of the amorphous silica layer by the heating effect of laser irradiation. The impurities are then removed by acid washing, achieving efficient separation and purification.
This method improves the purity and recycling efficiency of quartz glass, yields high-purity recycled quartz powder products, is highly adaptable, and is easy to scale up for production, thus achieving efficient recycling and high-value utilization of waste quartz crucibles.