用Na_2S外循环工艺从废CRT含铅玻璃中回收铅的试验研究

Experimental Study on the Lead Recovery from Waste CRT Glass by Circulation Process of Outside Na2S

废CRT含铅玻璃在高温下的熔融反应过程,可分为硫化铅的沉淀和硫化铅的还原两个工艺阶段,这两个工艺分别在不同的熔炼炉中进行。首先用硫化钠在熔融条件下将含铅玻璃中的铅组分沉淀成硫化铅,然后再采用加碱熔炼的方法将回收到的硫化铅冶炼成金属铅和硫化钠,人工收集获得的硫化钠作为下一个作业循环的硫化剂。研究了硫化钠加入量对硫化铅沉淀率以及温度、保温时间、碳粉、碳酸钠的加入量对金属铅的回收率的影响。

Waste CRT glass mehed reaction at high temperature, divided into the two process stage of lead sulfide precipitation and lead sulfide reduction, separately in different melting furnace. First used sodium sulfide under the condition of the molten lead in leaded glass components reaction precipitation into lead sulfide, and then adopt the method of alkaline smelting recovery to the smelting of lead sulfide into metal lead and sodium sul- phide, artificial collection of sodium sulfide as the next operation cycle of vulcanizing agent. The amount of sodi- um sulphide was studied in lead sulfide precipitation rate, temperature, holding time and the amount of carbon powder, sodium carbonate affect the recovery rate of metallic lead.