废铅膏湿法脱硫工艺和利用技术研究进展

总结了近年来国内外废铅蓄电池回收的工艺特点,重点对铅膏湿法脱硫工艺及利用技术进行了综述,整体分为固-液、固-固两大脱硫技术体系,对比分析了现有技术特色与不足;从湿法预脱硫反应机理及其模型评述了湿法脱硫工艺的关键控制因素,探讨了脱硫过程中由产物层包覆引起的反应不彻底的问题;针对此问题,分析并且肯定了剪切、碰撞、研磨等机械强化方式对传质过程的促进作用,在此基础上,提出了边磨边浸出式强化脱硫的工艺发展方向。

Research Progress of Wet Desulfurization Process and Utilization Technology of Waste Lead Paste

Technological characteristics of waste lead batterie recycling in recent years were briefly described from domestic and global aspect. Lead paste wet desulfurization process and utilization technology of current study were main summarized. The existing methods can be divided into solid-liquid and solid-solid desulfurization technology systems. Characteristics and shortcomings of the existing technologies were compared and analyzed. Key control factors of wet desulfurization process were reviewed from reaction mechanism and model of wet pre-desulfurization. The incomplete reaction caused by product layer coating during desulfurization process was discussed. In response to this problem, shear, collision, grinding and other mechanical strengthening methods were analyzed and confirmed due to their contribution of promoting mass transfer process. On this basis, outlook of grinding-leaching enhanced desulfurization was drawn.