关键词: 废铅膏, 脱硫, 表面更新

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