Abstract: Recycling of the lead-acid battery is an important section for lead-acid battery industry, and green technologies with low energy consumption and pollutants emission are in urgent demand. At present, the traditional process of paste pre-desulfurization rate is unstable and standard, resulting in low temperature melting cannot be carried out. To solve the problem, this paper presents a new pre-desulphurization process of the damped lead paste based on "Surface Update" mode "Surface update" mode is to add particles as grinding media, which grinds reaction particles in the reactor in high speed rotation and instantly damage the product of the lead carbonate layer in order to achieve the surface of the reaction particles update. Thus, we constructed the experiment system and studied the desulfurization performance of the sodium carbonate. Results showed that the process can maintain the sulfur content of lead paste under 0.3% at the optimum reaction conditions, i.e., stirring rate 60r/min, temperature 50℃, the slurry concentration 30%-60%, the molar ratio n(Na₂CO₃):n(PbSO₄)=1.1:1, and reaction time 40 min.

Key words: damped lead paste, desulphurization, surface update

摘要： 铅酸电池的回收是铅酸蓄电池行业的一个重要部分,并且绿色技术与低能耗和污染物排放是迫切需求的。目前,传统工艺铅膏预脱硫率无法稳定达标,致使低温熔炼无法进行。为了解决问题,本文提出铅膏预脱硫"表面更新"模式,添加粒子作为研磨介质,反应浆液与粒子在反应器内高速旋转,对反应颗粒进行研磨,即时破坏产物碳酸铅包裹层,实现反应颗粒表面更新。由此构建了实验系统,研究了碳酸钠在表面更新实验系统中的铅膏脱硫性能。实验表明,在转速60r/min、温度50℃、浆液浓度30%~60%、摩尔比n(Na₂CO₃):n(PbSO₄)=1.1:1条件下,反应40min,铅膏含硫率<0.3%。

关键词: 废铅膏, 脱硫, 表面更新