从废 CRT 漏斗玻璃中通过高温熔融法回收铅。
Lead recovery from waste CRT funnel glass by high-temperature melting process.
机构信息
School of Management, Tianjin University of Technology, Tianjin, China; School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, China.
School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, China.
出版信息
J Hazard Mater. 2018 Feb 5;343:220-226. doi: 10.1016/j.jhazmat.2017.09.034. Epub 2017 Sep 21.
In this research, a novel and effective process for waste CRT funnel glass treatment was developed. The key to this process is removal of lead from the CRT funnel glass by high-temperature melting process. Sodium carbonate powder was used as a fusion agent, sodium sulfide serves as a catalytic agent and carbon powder acts as reducing agent. Experimental results showed that lead recovery rate increased with an increase in the amount of added sodium carbonate, sodium sulfide, carbonate, temperature and holding time initially, and then reached a stable value. The maximum lead recovery rate was approximately 94%, when the optimum adding amount of sodium carbonate, sodium sulfide, carbonate, temperature and holding time were 25%, 8%, 3.6%, 1200°C and 120min, respectively. In the high-temperature melting process, lead silicate in the funnel glass was firstly reduced, and then removed. The glass slag can be made into sodium and potassium silicate by hydrolysis process. This study proposed a practical and economical process for recovery of lead and utilization of waste glass slag.
本研究开发了一种新颖有效的 CRT 漏斗玻璃废物处理方法。该工艺的关键是通过高温熔融工艺去除 CRT 漏斗玻璃中的铅。碳酸钠粉末用作熔剂，硫化钠用作催化剂，碳粉用作还原剂。实验结果表明，铅的回收率最初随碳酸钠、硫化钠、碳酸盐、温度和保温时间的增加而增加，然后达到稳定值。当碳酸钠、硫化钠、碳酸盐、温度和保温时间的最佳添加量分别为 25%、8%、3.6%、1200°C 和 120min 时，铅的最大回收率约为 94%。在高温熔融过程中，漏斗玻璃中的硅酸铅首先被还原，然后被去除。玻璃渣可以通过水解工艺制成硅酸钠和钾硅酸钠。本研究提出了一种实用且经济的回收铅和利用废玻璃渣的方法。
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