(东北大学 冶金学院，沈阳 110819)
摘 要: 采用X射线衍射和原子吸收光谱法研究向高铅渣添加废弃阴极射线管显示器含铅玻璃回收玻璃中铅的可行性，探讨还原煤用量、还原温度、还原时间和钙硅比对铅、锌回收率的影响，分析还原渣的物相变化以及玻璃加入量对还原渣熔融特性和黏度的影响。结果表明：通过该方法可有效地将玻璃中的铅回收，适宜的含铅玻璃加入量为10%~20%(质量分数)。最佳熔炼条件如下：碳氧比0.8、还原温度1230 ℃、还原时间70 min、钙硅比0.7。在此条件下，铅回收率可达96%以上，锌回收率达到83%以上。还原渣中的物相主要为铁氧化物、黄长石和橄榄石。玻璃的加入会使渣的熔点降低，液相比例升高，同时使渣的黏度增加，渣中铅含量升高。
关键字: 含铅玻璃；高铅渣；还原熔炼；铅回收；Factsage软件
（School of Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:The feasibility of lead extraction from waste cathode ray tubes (CRTs) funnel glass by introducing lead glass high lead slag was investigated by X-ray diffraction and atomic absorption spectroscopy. The influences of carbon addition, reducing temperature, reducing time and Ca-Si mass ratio on Pb and Zn recoveries were determined. Also, the phase changes of the residue, the effects of glass addition on the melting behavior and the viscosity of the slag were studied. The results show that the proposed method is an effective approach for extracting lead from funnel glass. The suitable glass addition is 10%-20% (mass fraction), and the optimum conditions are mole ratio C and O of 0.8, reducing temperature 1230 ℃, reducing time 70 min and Ca-Si mass ratio of 0.7. Under these conditions, Pb and Zn recovery rates reach up to 96% and 83%, respectively. The main phases of the residue are iron oxide, melilite and olivine. Meanwhile, the melting point of the slag can be lowered by the addition of funnel glass, resulting in the increase of the liquid phase ratio in the slag. However, it can also cause an increase of the slag viscosity, thereby, increasing the lead content in slag.
Key words: lead glass; high lead slag; reduction smelting; lead recovery; Factsage software
