In this study, a novel process for the extraction of heavy metal Ba and Sr from waste CRT panel glass and synchronous preparation of high silica glass powder was developed by glass phase separation. CRT panel glass was first remelted with B₂O₃ under air atmosphere to produce alkali borosilicate glass. During the phase separation process, the glass separated into two interconnected phases which were B₂O₃-rich phase and SiO₂-rich phase. Most of BaO, SrO and other metal oxides including Na₂O, K₂O, Al₂O₃ and CaO were mainly concentrated in the B₂O₃-rich phase. The interconnected B₂O₃-rich phase can be completely leached out by 5mol/L HNO₃ at 90 ℃. The remaining SiO₂-rich phase was porous glasses consisting almost entirely of silica. The maximum Ba and Sr removal rates were 98.84% and 99.38% and high silica glass powder (SiO₂ purity > 90 wt%) was obtained by setting the temperature, B₂O₃ added amount and holding time at 1000–1100 ℃, 20 - 30% and 30 mins, respectively. Thus this study developed an potential economical process for detoxification and reclamation of waste heavy metal glasses.

在这项研究中，通过玻璃相分离，开发了一种从废CRT平板玻璃中提取重金属Ba和Sr并同步制备高硅玻璃粉的新方法。首先在空气气氛下用B ₂ O _3将CRT平板玻璃重熔，以生产碱金属硼硅酸盐玻璃。在相分离过程中，玻璃分离成两个相互连接的相，即富含B ₂ O _3的相和富含SiO _2的相。BaO，SrO和其他金属氧化物（包括Na ₂ O，K ₂ O，Al ₂ O ₃和CaO）的大部分主要集中在B ₂ O _3中。丰富的阶段。5mol / L HNO ₃在90℃时可以完全浸出相互连通的富含B ₂ O _3的相。剩余的富含SiO _2的相是几乎完全由二氧化硅组成的多孔玻璃。通过设定温度，B ₂ O _3的添加量和保持时间在1000–1100℃，20的条件下，最大的Ba和Sr去除率分别为98.84％和99.38％，并且获得了高二氧化硅玻璃粉（SiO ₂纯度> 90 wt％）。-分别为30％和30分钟。因此，这项研究开发了一种潜在的经济方法，用于对废重金属玻璃进行排毒和回收。