Recovering lead from cathode ray tube funnel glass by mechano-chemical extraction in alkaline solution
Recovering lead from cathode ray tube funnel glass by mechano-chemical extraction in alkaline solution
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DOI：
10.1177/0734242x13484188
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发表时间：
2013-04
影响因子：
3.9
通讯作者：
Chenglong Zhang;Jingwei Wang;J. Bai;J. Guan;Wen-jing Wu;Cuixiang Guo
中科院分区：
文献类型：
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作者：
Chenglong Zhang;Jingwei Wang;J. Bai;J. Guan;Wen-jing Wu;Cuixiang Guo
本研究评估了在强碱性溶液中使用球磨机中的机械活化从阴极射线管（CRT）漏斗玻璃中提取铅（Pb）的效率，因为内部结构中形成的化学破碎和缺陷将有助于活化的Pb玻璃的容易溶解。机械活化和化学浸出工艺在单一操作中的组合（机械-化学浸出）比机械活化和随后的化学浸出更有效。CRT漏斗玻璃中超过97%的铅可以用搅拌球磨机浸出工艺在5 M氢氧化钠中在70°C下提取。作为活化介质的不锈钢球的直径为5 mm，球与原料的质量比为25：1。浸出液经电积可得到纯度为97%的铅粉。可将贫Pb溶液再循环到浸出步骤中。固体浸出渣除铅后可用于制备泡沫玻璃。因此，提出了一种在碱性溶液中湿法回收阴极射线管漏斗玻璃中铅的新工艺。
This study evaluates the efficiency of lead (Pb) extraction from cathode ray tube (CRT) funnel glass in strongly alkaline solution using mechanical activation in a ball mill as the chemical breakage and defects formed in the inner structures will contribute to the easy dissolution of the activated Pb glass. The combination of mechanical activation and a chemical leaching process in a single operation (mechano-chemical leaching) is more effective than the mechanical activation and subsequent chemical leaching. More than 97% of Pb in the CRT funnel glass can be extracted with a stirring ball mill leaching process in 5 M sodium hydroxide at 70°C. The diameter of the stainless steel balls as the activation medium is 5 mm; the mass ratio of ball to raw materials is 25:1. Pb powder with a purity of 97% can be obtained by electrowinning from the leaching solution. The Pb-depleted solution can be recycled into the leaching step. After Pb is removed, the solid leaching residues can be used for preparation of foam glass. Thus, a novel hydrometallurgical process for recovering Pb from CRT funnel glass in alkaline solution is proposed.