摘要
以NH4HCO3+NH3·H2O为脱硫转化剂,对废铅酸电池铅膏进行碳酸化处理。考察了转化剂用量、液固比、转化时间、转化温度等因素对铅膏脱硫率和铅回收率的影响,并确定了最佳反应条件。结果表明:在NH4HCO3+NH3·H2O用量为理论用量的2倍、液固质量比为5∶1、转化时间为2 h、转化温度为室温时,铅膏脱硫率最高可达99.5%;不同实验条件下脱硫后的铅膏中铅的含量变化不是很大,均在30%(质量分数)左右,与原始铅膏含铅率(71.87%)相比相差很大,铅回收率小于50%。通过对转化前后铅膏试样的XRD分析,表明铅膏脱硫率可达99%以上。
Lead paste generated from spent lead acid battery has been converted to lead carbonate using NH4HCO3＋NH3·H2O as the desulfurization conversion agents.Effects of the dosage of conversion reagents ,liquid-solid ratio,conversion tempera-ture, and conversion time on desulfurization rate and lead recovery were investigated, and the optimal conditions were con-firmed.The results showed that the desulfurization rate of lead paste was up to 99.5% under the conditions that the dosage of NH4HCO3＋NH3·H2O was 2 times of theoretical value ,liquid-solid mass ratio was 5：1, conversion temperature was at room temperature, and conversion time was 2 h.Under different experimental conditions,the change of the content of lead in desulfurized paste was not obvious, all about 30% （mass fraction ）, far from the content of lead in the starting lead paste which was 71.87%, so the recovery rate of lead was less than 50%.Meanwhile ,the desulfurized paste and the starting lead paste were analyzed by XRD, and the results also showed that the desulfurization rate of lead paste could reach more than 99%.
出处
《无机盐工业》
CAS
北大核心
2014年第2期57-60,共4页
Inorganic Chemicals Industry
基金
湖北省自然科学基金资助项目(2012FFB04906)
