“硫酸盐化—脱硫—甲基磺酸酸浸”回收废铅酸电池成套浸出工艺研究

Study on the Complete Set of Leaching Process for Recovery Waste Lead-Acid Battery by“Sulfation-Desulfurization-Methylsulfonic Acid Leaching”

缺乏经济环保的成套浸出工艺是湿法铅回收技术产业化的重要阻碍。为了解决现有湿法铅回收技术高产废、除杂难的问题,提出了基于“硫酸盐化—脱硫—甲基磺酸酸浸”的创新成套浸出工艺。通过使用SEM、XRD与XPS对每段工艺产物进行表征,对所提出的成套浸出工艺中各步骤的反应机理进行了初步推断。在对该成套浸出工艺的各个环节进行试验优化后,铅的回收率最高可达96.2%。ICP-OES表征结果初步表明,本浸出工艺能有效去除铅膏杂质,物料衡算结论则从理论上证明可实现较低产废。本工艺所得甲基磺酸铅产品应用领域广泛,综合来看,较现有再生铅浸出工艺更具有产业化的潜力。

The lack of economically and environmentally friendly complete leaching processes poses a significant obstacle to the industrialization of hydrometallurgical lead recycling technologies.In order to address the challenges associated with high waste production and impurity removal in existing hydrometallurgical lead recycling methods,an innovative complete leaching process based on“sulfurization-desulfurization-methanesulfonic acid leaching”was proposed.By using SEM,XRD,and XPS to characterize the products of each stage,the reaction mechanism of each step in the proposed complete set of leaching process was preliminarily inferred.The lead recovery rate is as high as 96.2%after the test optimization of various stages of the complete set leaching process.The preliminary results of ICP-OES characterization show that the leaching process can effectively remove impurities from the lead paste,and the results of material balance calculations prove theoretically that it can reduce waste production.The lead methanesulfonate product obtained from this process exhibits broad potential applications,and on the whole,it has more industrialization potential than the existing lead recovery processes.