Lead recovery and high silica glass powder synthesis from waste CRT funnel glasses through carbon thermal reduction enhanced glass phase separation process
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- 作者：Mingfei Xinga ; b ; Zegang Fub ; Yaping Wangc ; wangyp326@163.com" class="auth_mail" title="E-mail the corresponding author ; Jingyu Wangb ; Zhiyuan Zhangd
- 关键词：Hazardous waste ; CRT funnel glass ; Carbon-thermal reduction ; Glass phase separation ; Lead recovery
- 刊名：Journal of Hazardous Materials
- 出版年：2017
- 出版时间：15 January 2017
- 年：2017
- 卷：322
- 期：part_PB
- 页码：479-487
- 全文大小：5542 K
文摘
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CRT funnel glass was remelted with B2O3 in reducing atmosphere.
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A part of PbO was reduced into Pb and detached from the glass phase.
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The rest of PbO and other metal oxides were mainly concentrated in the B2O3 phase.
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PbO enriched in the interconnected B2O3 phase can be completely leached out by HNO3.
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High silica glass powder(SiO2 purity >95%) was obtained after the leaching process.