环境工程学报2017，Vol.11Issue(5)：3036-3042,7.DOI:10.12030/j.cjee.201607129
CRT锥玻璃碳热还原强化玻璃分相脱铅
Lead recovery from CRT funnel glass through carbon thermal reduction enhanced glass phase separation process
摘要
Abstract
In this study,toxic lead was removed from cathode-ray-tube funnel glass and synchronous preparation of high silica glass powder was developed using a carbon-thermal-reduction enhanced glass-phase-separation process.Part of the PbO contained in the funnel glass was reduced to metallic Pb and extracted from the glass.The remaining unreduced PbO was mainly concentrated in the interconnected pore network of the B2O3 phase.Most of the metallic Pb phase and B2O3 were leached out using 5 mol · L-1 HNO3.The optimum temperature,amount of added B2O3,and holding time for the process were 1 000 ℃,20％,and 30 min,respectively.The lead removal rate was 99.80％ and porous SiO2 (purity ＞ 95％) was obtained.The prepared high-silica glass powder could be used as a catalyst carrier or adsorbent,or be re-melted to form high-silica glass as the ideal substitute for quartz glass due to its novel properties of thermal stability and excellent light transmission.Therefore,this work resulted in development of a practical and economical process for detoxification and recycling of waste lead-containing glass.关键词
电子废弃物/含铅玻璃/碳热还原/玻璃分相/高硅氧玻璃Key words
electronic waste/lead containing glass/carbon thermal reduction/glass phase separation/high silica glass分类
资源环境引用本文复制引用
邢明飞,王净宇,张永慧,张东晖,付泽刚,张志远..CRT锥玻璃碳热还原强化玻璃分相脱铅[J].环境工程学报,2017,11(5):3036-3042,7.基金项目
国家自然科学基金资助项目(51508165) （51508165）
河南省高校矿山环境保护与生态修复省级重点实验室培育基地开放基金资助项目(KF2014-02) （KF2014-02）
河南省教育厅科学技术研究重点项目基础研究(13140055) （13140055）
