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废铅膏的成分和理化性质复杂，回收利用困难，其中高价态PbO2的还原更是废铅膏回收处理过程的关键难题。研究了在常温下，用葡萄糖-硫酸体系使废铅膏中的PbO2转化为PbSO4的还原硫酸化反应，考察了硫酸浓度、葡萄糖过量系数、液固体积质量比和反应时间对废铅膏还原硫酸化过程的影响。结果表明：取废铅膏5 g,在硫酸浓度85%、葡萄糖过量系数为3、液固体积质量比3/1、反应时间3 h的最佳反应条件下，PbO2还原率为91.88%,PbSO4质量分数为92.52%。该体系可将废铅膏中多种复杂成分还原硫酸化得到较高纯度的PbSO4产物，绿色高效，方便废铅膏的后续回收处理。
Abstract：The composition and physicochemical properties of waste lead paste are complex, and its recycling and utilization are difficult.Among them, the reduction of high-valent PbO2 is a key problem in the recycling and treatment process of waste lead paste.The reduction sulfation reaction of converting PbO2 in waste lead paste to PbSO4 using the glucose-sulfuric acid system at room temperature was studied.The effects of sulfuric acid concentration, glucose excess coefficient, liquid volume to solid mass ratio and reaction time on the reduction sulfation process of waste lead paste were investigated.The results show that under the optimal reaction conditions of waste lead paste of 5 g, sulfuric acid concentration of 85%,excess coefficient of glucose of 3,liquid volume to solid mass ratio of 3/1,and reaction time of 3 h, the reduction rate of PbO2 is 91.88% and the mass fraction of PbSO4 is 92.52%.The system can reduce and sulfate various complex components in waste lead paste to obtain PbSO4 products of higher purity.It is green and efficient, and convenient for the subsequent recycling and treatment of waste lead paste.
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基本信息:
DOI：10.13355/j.cnki.sfyj.2025.05.012
中图分类号:X705;TQ134.33
引用信息:
[1]潘媚媚,黄魁,董海丽等.葡萄糖-硫酸体系对废铅膏的还原硫酸化研究[J].湿法冶金,2025,44(05):666-671+691.DOI:10.13355/j.cnki.sfyj.2025.05.012.
基金信息:
国家自然科学基金资助项目(21767003)